Lab test report

Transcript

Lab test report

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LABORTEC
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65128 PESCARA - Via Raiale, 11O/B - Zona Ind.le Ovest
Tel. 085.432151 - Fax 085.51931
Partita Iva: 00226480689
http://www.labortec.it
- R.E.A. PE n. 47408
- Registro
Imprese
di Pescara
- e-mail: [email protected]
Experimental sector:
Section
Civil Engineering
Materials
Identification of Client:
NORDIMPIANTI SYSTEM S.R.L.
Via Piaggio, 19/A - Zona Industriale
66013 Chieti
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Works Reference:
Preliminary Production of a Prototype for the
Verification of the Production Plant.
Description of Specimens:
N° 2 Pre-stressed Concrete Elements named
"LOCRETE ELEMENT":
- Type A: 6 t pre-stressing
- Type B: 7 t pre-stressing
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Request of Client:
Description:
Load Tests on Prototypes of Prefabricated
Components
ACI 318M/9S
Technical
Specification
".Locrete
L=5.9m Load Test" issued by Locrete
International
Pty Ltd, on date 08
November 2005
Reference Norm:
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Identification of Document:
TEST REPORT N° R/052/0372
Date of issue:
28 december 2005
Sheet:
1/28
Enclosed Documents:
II
Accettazione:
A/OS17b/02/0S of OSthOctober 2005
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LABORTEC
TEST REPORT N°: R/052/0372
Date of issue: 28th december 2005
Page 2 of28
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65128 PESCARA - Via Raiale, 11O/B - Zona Ind. Ie Ovest
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SUMMARY
1-
Introduction
20
22
10
11
13
19
4638
pag. 28
pag.
pag.
pag.
pag.
pag.
2 - Documents and Reference Norms
3-
Description of Specimens
3.1 - Preparation and Seasoning of Specimens
4 - Description of Equipment and Instrumentation
4.1 - Loading Device
4.2 - Deflection Measuring Devices
5 - Description
..,
and Specifications of Test
6 - Acceptance Criteria of Test Results
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7 - Test Results
7.1 - Tests on beam identified as "Specimen A"
7.1.1 - Compression Test of the Concrete Topping Cast
7.2 -Stating Loading Test of Beam
7.1.3 - Discussion of Test Results
7.2 - Tests
7.2.1 7.2.2 7.1.3 -
on beam identified as "Specimen B"
Compression Test of the Concrete Topping Cast
Static Loading Test of Beam
Discussion of Test Results
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Enclosed Document I - Photographic Documentation
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Enclosed Document
Load Test"
II - Technical Specification
"Locrete L=5.9m
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1 - INTRODUCTION
Static load tests on two pre-stressed
concrete beams,
type "LOCRETE
ELEMENT", identified as "Specimen A" and "Specimen B" with pre-stressing force
respectively of6.0 t and 7.0 t have been carried out in a period between 10th November
and 14th December 2005. The customer was NORDIMPIANTI SYSTEM S.R.L.
The scope of the tests was to determine the mechanical behaviour of the
structures being tested under loads in accordance with the specifications of the norm
ACI 318M/95 reproduced in the Enclosed Document II of this Report.
2 - REFERENCE
DOCUMENTS
AND NORMS
Norm ACI 318M/95;
Technical
Specification
"Locrete L=5.9m Load Test", issued by Locrete
International Pty Ltd, on date 8th November 2005;
3 - DESCRIPTION
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OF SPECIMENS
The structural elements under test are pre-stressed concrete beams with a length
of 6.0 m. and a polygonal section. The reinforcing is a cable of 3/8 inches formed by 7
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strands, each with diameter 3.0 mm. in the centre of the cross section as shown in
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reinforceMent
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Figure 1: Typical cross section of the beam
Two beams have been tested, identified as "Specimen A" and "Specimen B",
which differ only in the pre-stressing force as follows:
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- Specimen A:
Pre-stressing Force = 6.0 t;
- Specimen B:
Pre-stressing Force = 7.0 t;
3.1 - Preparation and seasoning of specimens
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In
compliance
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the requests
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above-mentioned technical
specifications, the beams have been prepared by means of a completion casting with
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dimensions shown in figure 2 made with a concrete of class Rck = 50 MPa, prepared
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with cement type CEM R 52,5.
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Ply wood shutter
Pl~n concrete cast K500
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In order to determine the mechanical characteristics of the concrete casting, nr.
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6 cubic specimens have been prepared with dimensions 150 x 150 x 150 mm, to verify
the correspondence of the mechanical characteristics of the concrete with the requests
of the above-mentioned technical specifications which estabilish a class of resistance
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The load tests on the prefabricated elements, prepared as described, have been
carried out after a maturing period of at least 28 days and
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minimum compression strength of the concrete.
after verification of the
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4 - DESCRIPTION
4.1-Loading
OF EQUIPMENT
AND INSTRUMENTATION
device
The supports of the prefabricated elements, each with length of cm 600, have
been placed at a distance of cm 590 and have been realized with a smooth steel bar of
mm 16 diameter.
The test loading loading has been obtained with two 25 t oleodynamic jacks
ENERP AC with 50mm maximum extension. The jacks, connected in parallel to a
Hydraulic
circuit, are equipped with spherical joints to assure perfectly vertical
loading. A load cell HBM with 2.0 kN maximum loading has been placed on top of
one of the two jacks and connected to an
electronic acquisition device of HBM
manufacture, with calibration expiring on 06/04/2006, to measure the applied load.
The 4 concentrated loads, realized by means of the two jacks, have been placed
at distances of 147.5 cm from one another and at a minimum distance from the
centerline of the beam of 73.75 cm. A metallic structure has been placed between the
jacks and the beam to distribute the load of the jacks.
The loads have been applied on the beam by means of smooth steel bars with 16
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mm. diameter, with a layer of neoprene in between.
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Nr. 5 HBM linear deflection electronic transducers, with sensitivity 0.01 mm
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and placed with the sensor in contact with the beam and connected to an HBM
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electronic acquisition device, have been used to measure the deflection of the beam.
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Referring to the identification numbers of the channels of the acquisition unit,
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the deflecton transducers have been disposed as follows:
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Ch 1: Linear displacement transducer with the vertical axis in correspondence with
one of the supports and feeling device touching the soffit of the beam to
measure the vertical deflection of the support;
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Ch 2: Linear displacement transducer placed with horizontal axis and feeling device
touching the pre-stressing cable at one end of the beam to measure the sliding
of the cable;
Ch 3: Linear displacement transducer with the vertical axis corresponding to the other
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support and feeling device touching the soffit of the beam to measure the
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vertical deflection of the support;
Ch 4: Linear displacement transducer placed with horizontal axis and feeling device
touching the pre-stressing cable at the othe end of the beam to measure the
sliding of the cable;
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Ch 5: Linear displacement transducer with vertical axis corresponding to the
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centerline of the beam and feeling device touching the soffit of the beam to
measure the maximum vertical deflection of the beam;
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measure the load transmitted by the oleodynamic jacks.
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The layout of test with loads and of the displacement transducers position is
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shown in figure 3.
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oleodynamic jack
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data acquisition
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force transducer
Figure 3: Layout ofthe test with position of loads and of displacement tranducers
5 - DESCRIPTION AND SPECIFICATIONS OF TEST
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The tests have been carried out in accordance with the prescriptions of the
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technical specifications called "Locrete L=5.9m Load Test", applying to the beams
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four identical loads, placed as described, each of a maximum value of 82 kg, as
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indicated in the aforesaid technical specifications.
These maximum loads have been realized applying a load of 164 kg, equal to
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1069 N increased to 1620 N in correspondence with each of the two oleodynamic
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jacks. The maximum applied load in correspondence with the jack includes the weight
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of the jack and that of the metallic structure distributing the load, estimed to be 150 N.
Thus the maximum load applied to each jack through the oleodynamic circuit
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The loads have been applied in steps to obtain a complete loading and
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unloading cycle as follows:
ttLABORTEC
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- e-mail: infolabortec@labortec"it
Step 0: Beam perfectly unloaded, that is without even the jacks and the
load distributing structure;
Instantaneous reading of the zero.
Step 1: 255 N load applied to each jack plus the weight of the jack and
that of the metallic distributing structure, that is 150 N, adding up
to 405 N for each jack;
Instantaneous reading of displacements.
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Step 4: 1470 N load applied to each jack, plus the weight of the jack and
N for each jack, left in place for 24 hours;
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Instantaneous reading of displacements and reading after 24 hours
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from the application of the maximum load;
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that of the distributing structure, that is 150 N, adding up to 405 N
for each jack;
Step 0: Beam perfectly unloaded, that is without even the jacks and the
load distributing structure;
Instantaneous reading of displacements and reading after 24 hours
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since the complete removal of all loads.
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6 - ACCEPTANCE
CRITERIA
OF TEST RESULTS
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According to the prescriptions of the test specifications identified
as "Locrete
L=5,9 m Load Test", the results are considered to be acceptable if at least one of the
following criteria is satisfied:
A) The maximum displacement measured at the centerline of the beam after 24
hours of uninterrupted
application of the maximum test loading must be
equal to or less than 10.55 mm and the beam being tested must not show
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any cracking;
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B) If the conditions of point A) are not satisfied, the maximum residual
displacement after 24 hours since the complete removal of the loading must
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be smaller than 25% of the maximum displacement under maximum load
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C) If neither the conditions of point A) nor those of point B) are satisfied, the
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test must be repeated after at least 72 hours from the conclusion of the first
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test and the residual displacement after 24 hours since the complete removal
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of the load must be less than 20% of the displacement under maximum load
and no cracking must be detected in the beam being tested.
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BEAM TYPE "LOCRETE" IDENTIFIED AS "SPECIMEN A"
COMPRESSION TEST OF THE CONCRETE TOPPING CAST
Identification of the specimen
Description of the specimen:
N° 6 cubic samples of the concrete used in
the topping cast of the pre-stressed beam type
"LOCRETE
ELEMENT"
identified
as
"Specimen A"
Class of Resistance:
Date of casting:
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Rck 50 MPa
10 th October 2005
Test method:
UNI EN 12390-3
Test Equipment
Press Controls
Conditions of test:
Ambient temperature and humidity
Date of test:
18h October 2005 and 9th november 2005
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RESULTS OF THE TESTS
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Compression after 7 days
mm
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Date
Mass
Area
**MPa
Dimensions
43.3
7.505
1(*)
18/10/05
42.7
7.485
noof
22500
150
150 collapse
150
R.:
oftest
7.490
Straigh.
Identification
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*1) bipyramidal; 2) bipyramidal flaking; 3) slanted flanking; 4) crushingo
**
1 Mpa
= IN
/ mm2
Page 12 of28
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mm
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Mass
Dimensions
**MPa
Date
Area
18/10/05
18110/05
58.6
59.1
58.1
7.560
7.525
7.590
1(*)
22500
R.:
150
150 collapse
150
Identification
Straigh.
oftest
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*1) bipyramidal; 2) bipyramidal flaking; 3) slanted flanking; 4) crushing.
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The Technician in charge
(Dott. Ing. Antonio Filippone)
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LABORTEC
TEST REPORT N°: R/OS2/0372
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r-r--
- R.E.A. PE no 47408
- Registro
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BEAM TYPE "LOCRETE" IDENTIFIED AS "SPECIMEN A"
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STATIC LOAD TEST NR. 1
Identification of the specimen:
Descriptionof the specimen:
N° 1 pre-stressed concrete beam, type
"LOCRETE
ELEMENT'
identified
as
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"Specimen A"
Sampling method:
Date of receipt:
Date of casting:
Care of the customer
Specimen labelled "Specimen A", with 6 t
pre-stressing
5th October 2005
10th October 2005 topped with concrete cast
10 cm thick
Test method:
Technical Specification "Locrete L=5,9 m
Load Test" issued by Locrete International
Pty Ltd, on date 08th november 2005
Test Equipment:
- nr. 2 ENERP ACK oleodynamic jacks
- nr. 1 2kN HBM load cell
- nr. 5 LTD displacement transducers
Test Conditions:
Date of the Test:
Start on 10th november 2005
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TEST RESULTS
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Instantaneous net displacement under maximum loading
Maximum net displacement after 24 hours and 8
minutes since the application of maximum loading
- Net residual displacement at unloading after 24 hours
and 20 minutes since complete removal of loading:
8.80
14.62
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(Dott. Ing. Antonio FiliRPone)
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The Director of theLaboratory
(Dott{ Afc~·Ylrffrio
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,fillgelini)
05
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LABORTEC
Page 15 of28
s.r.1.
TeI.085.432151-Fax085.51931
http://www.lahortec.it
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LABORTEC
TEST REPORT N°: R1052/0372
Page 16 of28
s.r.1.
Tel. 085.432151 - Fax 085.51931
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BEAM TYPE "LOCRETE"
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A"
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IDENTIFIED
Descriptionofthe specimen:
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Sampling method:
Date of receipt:
Date of casting:
"LOCRETE
ELEMENT"
identified
as
"Specimen A"
Care of the customer
Specimen labelled "Specimen A", with 6 t
pre-stressing
5th October 2005
10th October 2005 topped with concrete cast
10 cm thick
Test method:
Technical Specification "Locrete L=5,9 m
Test Equipment:
- nr. 1 2kN HBM load cell
- nr. 5 LTD displacement transducers
Test Conditions:
Date of the Test:
Start on 14th november 2005
TEST RESULTS
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Instantaneous net displacement under maximum loading
Maximum net displacement after 23 hours and 29
minutes since the application of maximum loading
- Net residual displacement at unloading after 24 hours
and 23 minutes since complete removal of loading:
8.63
10.36
1.09
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IItr LABORTEC
Page 17 of28
s.r.l.
Tel. 085.432151 - Fax 085.51931
- R.E.A. PE n. 47408
- Registro
tmprese
di Pescara
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LABORTEC
Page 18 of28
s.r.1.
Tel. 085.432151 -Fax085.51931
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LABORTEC
Page 19 of28
s.r.1.
Tel. 085.432151 - Fax 085.51931
r-r--
- REA.
PE no 47408
- Registro
Imprese
di Pescara
- e-mail: infolabortec@labortecoit
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The compression test on samples of the concrete of the topping cast on the
beam identified as "Specimen A" has had a positive outcome, as the resistance values
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of compression Rc meet the requirements of an acceptance control of type A, because
both the following expressions are verified:
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Rm = 58.6 > Rck + 3.5 Mpa = 53.5 MPa
Rl = 58.1 > Rck - 3.5 MPa = 46.5 MPa
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hours has been 14.62 mm, that is more than the acceptable limit of 10.50 mm and the
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residual net displacement after 24 hours since the removal of the load, equal of 7.02
mm, has been more than 25% than the maximum net displacement. Therefore the
acceptance criteria A) and B) described in chapter 6 have not been met.
The static load test nr 2 on the beam identified as "Specimen A", has had a
positive outcome, as the residual net displacement since the removal of the load has
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been 1.09 mm, that is less than 10.36 mm or 20% of the maximum net displacement
under maximum load after 24 hours. Therefore the acceptance criterion C), described
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stressing cable have been detected.
LABORTEC
Page 20 of 28
s.r.1.
TeI.085.432151-Fax085.51931
r-r--
BEAM TYPE "LOCRETE" IDENTIFIED AS "SPECIMEN B"
C')
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COMPRESSION TEST OF THE CONCRETE TOPPING CAST
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Class of Resistance:
Date of Casting :
N° 6 cubic samples of the concrete used in
the topping cast on the pre-stressed concrete
beam
type
"LOCRETE
ELEMENT"
identified as "Specimen B".
Rck 50 MPa
31 st october 2005
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Test Method:
UNI EN 12390-3
Test Equipment:
Controls Press
Test Conditions:
Ambient Temperature and Humidity
Date of the test:
08th
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**MPa
Mass
Date
Dimensions
Area
41.6
7.475
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08/11/05
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41.8
7.480
22500
150
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**
I Mpa
= IN
/ mm2
Itr LABORTEC
Page 21 of28
s.r.l.
Tel. 085.432151 - Fax 085.51931
Partita IV3: 00226480689
r-r--
- R.E.A, PE n, 47408
- Registro
Imprese
di Pescara
(')
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C;
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mm
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**MPa
Date
Mass
Area
Dimensions
01/12/05
58.2
57.9
57.8
7.505
7.485
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LABORTEC
TEST REPORT N°: R1052/0372
Page 22 of 28
s.r.1.
Tel. 085.432151 - Fax 085.51931
http://wwwolabortecoit - e-mail: [email protected]
BEAM TYPE "LOCRETE"
IDENTIFIED
AS "SPECIMEN
B"
Sampling Method:
Identification of the Specimen
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Q;
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Date of receipt :
Data di casting:
<D
c:
"LOCRETE
ELEMENT"
identified
as
"Specimen B"
Care of the Customer
Specimen labelled "Specimen B", with 7 t
pre-stressing
05th october 2005
31th October 2005, concrete topping cast 10
cm thick on beam
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0.
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Method of testing:
Technical Specification "Locrete L=5.9m
Test Equipment:
- nr. 1 2 kN HBM load cell
- nr. 5 LTD displacements transducers
Test Conditions:
Date of the Test:
Start 06th dicember 2005
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Net Instantaneous Displacement under Maximum Load
Net Maximum Displacement after 25 hours
and 16 minutes since maximum loading
- Net Residual Displacement at unloading after 24 hours
and 12 minutes since complete removal of loading
8.62
12.34
4.27
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The Director oftheLaboratory
(Dort. lng. Antonio Filipwne)
(Dort( Afep., Yi~&iniRAngelini)
AJ
LABORTEC
Page 23 of 28
s.r.1.
Tel. 085.432151 - Fax 085.51931
Partita Iva: 00226480689 - REA. PE n. 47408 - Registro Imprese di Pescara
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december
Cable
2005
Support
Cable
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4.34
6.39
2.14
6.51
8.85
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8.73
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.
IItr LABORTEC
TEST REPORT N°: R/OS2/0372
Page 24 of 28
s.r.l.
65128 PESCARA - Via Raiale, 11 O/B - Zona Ind.le Ovest
Tel. 085.432151 -Fax085.51931
Beam "Specimen B" - Test nr. 1
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LABORTEC
Page 25 of28
s.r.l.
Tel. 085.432151 - Fax 085.51931
""C')
BEAM TYPE "LOCRETE"
CD
IDENTIFIED
AS "SPECIMEN
B"
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"LOCRETE
ELEMENT"
identified
as
"Specimen B"
Care of the Customer
Specimen labelled "Specimen B", with 7 t
pre-stressing
05th october 2005
31th October 5, concrete topping cast 10 cm
thick on beam
Method of testing:
Technical Specification "Locrete L=5.9m
Test Equipment:
- nr. 1 2 kN HBM load cell
- nr. 5 LTD displacements transducers
Test Conditions:
Date of the test:
Start 12 th dicember 2005
TEST RESULTS
4° Load Step
Ch5
(mm)
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Net Instantaneous Displacement under Maximum Load
Maximum Net Displacement after 24 hours and 23 minutes
since the application of maximum load
- Net Residual Displacement at unloading after 24 hours
and 22 minutes since the complete removal of the loading
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(Dott. lng. Antonio Fil~ppone)
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LABORTEC
Page 26 of28
s.r.1.
Tel. 085.432151 - Fax 085.51931
- R.E.A. PE n. 47408 - Registro Imprese di Pescara
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Date of issue:
Page 27 of28
s.r.l.
28th
december 2005
Tel. 085.432151 - Fax 085.51931
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Page 28 of 28
Tel. 085.432151 - Fax 085.51931
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The Compression Test on the concrete samples from the topping casting on the
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beam identified as "Specimen B" has had a positive outcome since the values of the
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of an acceptance
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control of type "A", because they verify both the expressions:
Rm = 58.0 > Rck + 3.5 MPa = 53.5 MPa
Rl =57.8 > Rck - 3.5 MPa = 46.5 MPa
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The static load test nr 1 on the beam identified as "Specimen B" has had a
negative outcome since the maximum net displacement under maximum load after 24
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the residual net displacement after 24 hours since the removal of the load is 4.27mm,
that is more than 25% of the maximum net displacement. Therefore the acceptance
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criteria A) and B) described in chapter 6 have not been satisfied.
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positive outcome since the net residual displacements after 24 hours since the removal
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under maximum load after 24 hours, that is 9.31 mm. Then the acceptance criterion C)
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During the static load test no cracking and no sliding of the pre-stressing cable
has been detected on the beam under test..
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PHOTOGRAPHIC
DOCUMENTATION
- BEAM "SPECIMEN A"
I
Photograph 02: Preparation of the static load test
LABORTEC
s.r.1.
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Partita (va: 00226480689 - R.E.A. PE n. 47408 - Registro (mprese di Pescara
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PHOTOGRAPHIC
DOCUMENTATION
- BEAM "SPECIMEN B"
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LABORTEC
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....
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Civil Engineering
Materials
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""<'1
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- R.EoA. PE no 47408
- Registro
Imprese
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Section
Civil Engineering
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66013 Chieti
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Enclosed Document II
Technical Specification "Locrete L=5.9m Load Test"
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LOCRETE INTERNATIONAL Ptv Ltd.
LOCRETE SLAB - ELEMENT L = 5.9m
LOAD TEST
LOCRETE INTERNATIONAL
Pty Ltd.
LOCRETE L = 5.9m - LOAD TEST
TABLE OF CONTENTS
1
INTRODUCTION
2
PROCEDURE SUMMARY
3
LOAD TEST PROCEDURE - METHOD STATEMENT
5
LOAD TEST ACCEPTANCE
CRITERIA
6
SECTION PROPERTIES CALCULATION
10
STRESS CALCULATION
12
ALLOWABLE
STRESSES
13
TEST LOAD INTENSITY CALCULATION
Client
Locrete International Ply Ltd. Job No.
Project
Subject
Locrete Test
Locrete L=5.9m - LOAD TEST
____
----
Prepared by
Checked by
!M.!M.
V. V.
Page
Date
Date
1
8th
Nov. 2005
--8th Nov. 2005
INTRODUCTION
DESCRIPTION:
Locrete element L=5.9m have been
elements with 100mm structural topping.
designed
as pre-caste
pre-stressed
As per the Client's request, Locrete element shall be tested, verifying the element
structural adequacy.
The Scope of this report is the Locrete L=5.9m Load Test procedure and
the acceptance of obtained results.
GENERAL ASSUMPTIONS
REFERRED CODES:
ACI318M/95,
PC I manual
U BC/94
d.
4FI;C
Client
Project
Subject
___
':~crete International ~ty ~~d._Job No.
Locrete
Locrete
Test
L=5.9m·
LOAD
~~L..
_____
.__.
Prepared by
!M!M
Checked by
V. V.
Page
Date
Date
1
--8iii-N-;;~:2005----
-srh Nov. 2005
PROCEDURE SUMMARY
Following the Building Code Requirements for Structural Concrete AC1318M/95, a pre-cast
element to be made composite with cast in place concrete shall be permitted to be tested in
flexure as a pre-cast element alone, as stated in article 16.10. The value of Test Load shall
be calculated following the condition that the stresses in bottom fiber induced in pre-cast
element alone, during the Load Test, shall correspond to the stress in composite member
under the Test Load required by Code article 20.3.2:
TEST LOAD = 0.85 ( 1.40 DL + 1.70 LL)
The Load Test procedure and element strength evaluation
Chapter 20 of above mentioned Code.
shall be in accordance
with
Presented Load Test procedure may be summarized as follows:
1. The Locrete L=5.9m shall be subject of the Load Test with topping poured. Only one
element shall be tested.
2. At the time of performing the Load Test the min. age of concrete shall be 28 days.
3. Required value of Test Load is q Test = 55.575 tim' with equivalent two concentrate load of
P1=164 kg (as shown on sketch last page for load test requirements of the excel file).
4. The Load Test shall be in accordance with enclosed Method Statement.
5. Expected deflections under the Test Load are in range of 13.55 mm. Since The
Acceptance Criteria is allowing 10.50mm the residual deflection shall govern.
d.
4FEC
-------
-ErhPage
-Date
Nov.
Date 2005
Client
V.V.
Locrete
Checked
Test
by Ltd. Job No.
tf' Locrete
Nov.
Prepared
2005
L=5.9m
• LOAD
by TEST
!M!M
Locrete
International
Ply
:1
~ __
... ·_·M.
___
.W__
:
w
METHOD STATEMENT FOR FFTT1 SLAB LOAD TEST
(Ref. ACI 318M/95, art. 16.10 and 20.)
1. GENERAL
1.1 The Load Test shall be performed on pre-cast element with topping poured. No more
than 1 NOS. slabs shall be loaded during the load test.
1.2 Examine the supporting
structural drawings.
2. MEASURING INSTRUMENTS
condition of the Locrete and verify compliance
with relevant
INSTALLATION
2.1 Verify that all instruments to be used are well calibrated (by available documents
additional calibration tests).
or
2.2 The point with characteristic deflection to be measured has to be at the midspan of the
element.
2.3 Record the initial, "zero" readings immediately prior to Test Load application, forming the
datum for deflection measurements.
3. TEST LOAD APPLICATION
3.1 Verify the density of material to be used as a Test Load and determine overall depth of
intill considering the required Test Load of 55.575 kg/m' or two concentrate force
P1=164 kg as shown on sketch (page ).
3.2 Apply Test Load in four equal increments, avoiding shock to the structure and arching of
used material.
3.3 Verify the uniformity of the load and take the readings for each load increment.
4. TEST LOAD REMOVAL
4.1 Applied Test Load shall be kept in position at least for 24 hours.
4.2 Take additional reading prior to remove the Test Load as deflection 6max representing
the base value for the Load Test Acceptance Criteria.
4.3 Remove the Test Load immediately after the reading is taken.
d.
4FI!C
Client
Project
Subject
,:::,!_C?~!!,~_!!~~~!!!,~!!,!n~_'_~.~~t!.~
__Job No.
_________________
!:-ocr:.e.~! Test
Locrete
L=5.9m - LOAD TEST
..Prepared by
Checked by
______________
Page
fMfM_--- Date
-_.~-~.~
_-_
V. V.
Date
...
..
..
_~....•.
~_ ~
..
1
__ _--8th Nov. 2005
_
_
_._-_._.
..
----iJth--,.io-:v.-200S--
5. INSPECTION OF OBTAINED LOAD TEST RESULTS
5.1 In case the reading from section 4.2 satisfies the Acceptance Criteria (L1max~10.50mm)
and no evidence of element failure is present, obtained results shall be considered
satisfactory.
5.2 In case the reading for L1max
does not satisfy the Acceptance Criteria (L1max>10.50mm)
additional reading shall be recorded 24 hours after the Test Load removal, representing
the value L1rmax
for residual deflection.
5.3 The Load Test results shall be acceptable if (L1r max~ L1max/4) giving the min 75 %
deflection recovery in addition to absence of any evidence of element failure.
6. REPEATED LOAD TEST
6.1 If the results are not complying to the Acceptance Criteria the Load Test shall be
repeated not earlier than 72 hours after the initial Test Load removal.
6.2 Repeated Load Test shall fully comply to sections 3, 4 and 5 from this Method
Statement.
6.3 Final residual deflection recorded during the repeated Load Test must show min 80 % of
deflection recovery in order to be considered satisfactory.
d.
4FI;C
. :.
_--------
-Nov.
Page
8th
Locrete
Nov.
Test
2005
£Ih
V.V.
2005
!M9;t
Date
Client
Date
: International
1Prepared
by TEST
Locrete
L=5.9m
Checked
- LOAD
by No.
_!:-ocrete
Ply
Ltd.
Job
ACCEPTANCE
......
_.__·._.......
__._H....
._ ••_MH .....
••• _
••••_
•••••• _____
:
CRITERIA FOR LOAD TEST
(Ref. AC1318M/95 art. 20.5)
The results obtained by test load shall be considered acceptable under following conditions:
>-
There is no evidence of element failure
The failure of the element is indicated by:
spalling of concrete
crashing of concrete in compression zone
any cracks induced by shear force
>-
Measured deflections shall satisfy one of the following conditions:
1) Maximum recorded deflection
~max ~
~max
L2/(20 OOOh)= 10.5 mm
where
- element length
L = 5.9 m
h = 0.165 m - element depth
2) Maximum recorded residual deflection
~rmax ~ ~max
/4
~r max after
removal of load
(min 75% of deflection recovery is required)
In case none of above conditions is satisfied Load Test shall be repeated not
earlier than 72 hours after load removal. The new acceptance criteria, if no
evidence of failure appears, shall be the residual deflection value as follows:
~rmax ~ ~fmax
/5
(min 80% of deflection recovery is required)
where ~f max is the maximum
deflection
recorded with new "zero"
readings taken before the repeated Load Test.
•••••
AFEC

Lab test report

Transcript

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