This procedure is established to stipulate for each step of test, inspection, report and assessment work of concrete mix designs at Song Hau 1 Thermal Power Plant project. It applies to all types of fresh concrete that will be used for PHC pile production (onshore part)
Trang 10 23/02/2016 FOR CONSTRUCTION T.V.SON T.Q.KHUONG T.V.DUNG
HA NOI CONSTRUCTION CORPORATION
VIỆN KHOA HỌC CÔNG NGHỆ XÂY DỰNG (IBST)
VIỆN CHUYÊN NGÀNH BÊ TÔNG (ICT) PHÒNG THÍ NGHIỆM HIỆN TRƯỜNG
VIETNAM OIL AND GAS GROUP (PVN)
FICHTNER GmbH & Co KG PV ENGINEERING
VIETNAM MACHINERY INSTALLATION
CORPORATION (LILAMA) TOKYO ELECTRIC POWER SERVICES
COMPANY LIMITED -TEPSCO
Trang 2SONG HAU 1 POWER PLANT PROJECT
Document No.:
SH1-PTSC/LLM-
P0100-C-C13-PRO-0007
CONCRETE MIX DESIGN, TRIAL MIX &
REPORTING PROCEDURE FOR STRUCTURE
OF PLANT
Trang 3TABLE OF CONTENTS
1.0 PURPOSE 3
2.0 SCOPE 3
3.0 REFERENCES 3
4.0 DEFINITIONS 3
5.0 PROCEDURE 4
6.0 APPENDIXES 10
Trang 4- Section 6: Technical Specification for Cast in place Concrete
- Section 7: Technical Specification for Concrete Piling
- Report on detailed Design of Equipment Jetty
Vietnamese standards:
TCVN 7570-2006: Aggregates for concrete and mortar – Specifications
TCVN 7572-2006: Aggregates for concrete and mortar – Test methods
TCVN 4506-2012: Water for mixing concrete and mortar – Technical specification
Other standards
Foreign standards:
ACI 318: Building code requirements for Structural concrete and Commentary
ASTM C33: Standard specification for Concrete aggregates
ASTM C150: Standard specification for Portland cement
ASTM C494: Standard specification for Chemical admixtures for concrete
Other standards
Owner: Song Hau 1 Power Plant Projects Management Board (SH1PP)
PMC: Project Management Consultant of Owner – Fichtner & PVE.
EPC Contractor: Viet Nam Machinery Installation (Lilama)
Subcontractor: Hancorp
Trang 5A strength test: shall be the average of the strengths of three 150 by 300 mm cylinders made from
the same sample of concrete and tested at 28 days A set: contains three 150 by 300 mm cylinders
made from the same sample of concrete
5.1 Responsibilities
5.1.1 Subcontractor
+ To notify the related parties about plan of work implementation
+ To complete the appropriate check sheets or reports in progress and submit to EPC Contractorfor confirmation/endorsing
+ To prepare the inspection document, testing equipment, etc
+ To carry out the testing work
- The Batch Plant Manager:
Is incharge of overall management of the operations of the batching plant and to be under thecoordination of Civil QA/QC Manager
- The Site Laboratory Manager:
Is in charge of managing all laboratory activities in terms of supervising the concrete quality/ensuring that all necessary samples are taken and tests are carried out as required by theSpecification and to be under the coordination of Civil QA/QC Manager
5.1.2 EPC Contractor
+ To prepare all the things which serve for this work
+ For monitoring quality related activities and endorsing check sheet/test documents at the time
- Civil QA/QC Manager:
Is incharge of overall quality control
Trang 65.1.3 Owner/PMC
+ To monitor/witness the process and EPC Contractor’s performance
+ To review/comment/approve on the documentation which EPC Contractor submit
Testing of concrete mix proportion at batching plant
ReportingTesting materials at Lab
Trang 75.3 Sampling and input materials tests
Refer to “SH1-LLM-P0001-C-G01-ITP-0007: Inspection and test plan for concrete”
5.4 Testing materials
Testing Result on Cement, Fine aggregates and coarse aggregate at laboratory
5.5 Input materials acceptance
Refer to “SH1-LLM-P0001-C-G01-ITP-0007: Inspection and test plan for concrete”
5.6 Proportional Design concrete at Lab
After testing Result on Cement, Fine aggregates, Coarse aggregate and Input materials
acceptance, Design concrete mixing Proportion including 11 Step (Refer to “ACI 211.04R-08”):
5.6.1 Step 1: Select slump and required concrete strength
5.6.2 Step 2: Select maximum size of aggregate
5.6.3 Step 3: Select optimum coarse aggregate content
5.6.4 Step 4: Estimate mixing water and air content
5.6.5 Step 5: Select w/cm
5.6.6 Step 6: Calculate content of cementitious material
5.6.7 Step 7: Proportion basic mixture with no other cementitious material
5.6.8 Step 8: Proportion companion mixtures using silicafume
5.6.9 Step 9: Trial mixtures
5.6.10 Step 10: Adjust trial mixture proportions
5.6.11 Step 11: Select optimum mixture proportions
Trang 85.7 Raw concrete mix proportion
Raw concrete mix proportion is established in accordance with characteristics of input materials Itshall contain detail weight/volume of individual materials for 1m3 of concrete and otherrequirements such as: water/cementitious materials ratio, slump, water absorption, module, size,type, etc
Subcontractor or 1 third party will prepare the Mix design documentation which includes the rawconcrete mix proportion and submit to EPC Contractor for review
5.8 Testing of concrete mix proportion at batching plant
The purpose of testing of concrete mix proportion at batching plant is to re-check the correctness ofraw concrete mix proportion and verify & confirm the result of testing at laboratory
Both fine aggregates and coarse aggregate at batching plant shall be tested for determining theactual moisture Base on raw concrete mix proportion, actual moisture and water absorption ofaggregates, actual mix proportion after correcting moisture of aggregates can be calculated That isthe proportion mixed at batching plant
“C-001A-LAB-003-01-Dosage adjustment conforming to actual moisture of aggregates” form shall
be used to adjust the moisture of aggregates
5.8.1 Trial mixes
a) Trial mixes at the Laboratory
Trial mix for each mix class shall be made using water-cementitious materials ratios depend on Raw concrete mix proportion.Concrete mix after mixing of all proportions shall be sampled to check the compressive strength.Based on the compressive strength, the propotion of concrete whichmeet requirement shall be selected
“C-001A-LAB-006-01_Concrete test sample stamp” shall be used in this section
b) Trial mixes at the batching plant
Raw concrete mix proportion that were selected after trial mixes at the Laboratory will be used totrial mixes at batching plant.Concrete mix after mixing of all proportions shall be sampled to checkthe compressive strength.Based on the compressive strength, the propotion of concrete which meet
0
Trang 9requirement shall be selected.Mix proportions that were selected and test result will be summited toThe Owner for approved
“C-001A-LAB-006-01_Concrete test sample stamp” shall be used in this section
5.8.2 Check slump, temperature, air content & setting time of concrete mix after mixing
The slump test shall be performed in accordance with ASTM C143
The temperature test shall be performed conforming to ASTM C1064
The air content test shall be performed in accordance with ASTM C231 or ASTM C173
“C-001A-LAB-003-01_Dosage adjustment conforming to actual moisture of aggregates” formshall also be used to check these parameters
5.8.3 Quantity of specimens need to be sampled at concrete age for each mix proportion
- 3 days: 01 set (for strength reference)
- 7 days: 01 set (for strength reference)
- 28 days: The min set used for each water-cementitious material ratio shall be 4
“C-001A-LAB-006-01_Concrete test sample stamp” shall be used in this section
5.8.4 Assessment of compressive strength test results
“C-001A-LAB-003-02_Test report for compressive strength of molded spesimens” form shall beused to check the concrete compressive strength
- Specified compressive strength: fc’
- Required average compressive strength: fcr’
- Average compressive strength (of n strength tests):
fcr’ shall be determined in accordance with Table 5.3.2.2 – ACI 318 as section 5.6.3.2
Specified compressive strength fc’ < 21 21 ≤ fc’ ≤ 35 fc’ > 35
0
Trang 10(MPa)Required average compressive
strength (MPa) fcr’ = fc’ + 7.0 fcr’ = fc’ + 8.3 fcr’ = 1.1fc’ + 5
Evaluation and acceptance of concrete:
Assessment shall be acceptable if two following conditions are met:
+ Falls below fc’ by more than 3.5 MPa when fc’ is 35 MPa or less
+ Falls below fc’ by more than 0.1*fc’ when fc’ is more than 35 MPa
The mix proportions that reach best results shall be chosen to make report and submit for approval
5.9 Reporting
The reporting structure shall be as follows:
5.9.1 Calibration certificates of testing and measuring equipment
- Testing equipment
- Measuring equipment
- Minutes of laboratory of checking (if any)
5.9.2 Mill certificates and Test reports of input materials
- Mill certificates and Test reports of Cement
- Mill certificates and Test reports of Admixture
- Test reports of Natural/River sand
- Test reports of Manufactured sand (if any)
Trang 11- Test reports of Crushed stone
- Test reports of Water
5.9.3 Mix design – Laboratory
- Mix design 1
+ Moisture adjustment
+ Compressive strength at 3 days
+ Compressive strength at 7 days
+ Compressive strength at 28 days
- Mix design 2, etc (if any)
5.9.4 Trial mix – Field trial
- Trial mix 1
+ Moisture adjustment
+ Compressive strength at 3 days
+ Compressive strength at 7 days
+ Compressive strength at 28 days
- Trial mix 2, etc (if any)
(01 page)Appendix 3: C-001A-LAB-006-01_Concrete test sample stamp (01 page)
Appendix 4: C-001A-LAB-007_Calculation sheet of concrete compressive strength test (01 page)
Trang 167.0 MATERIALS’RE USED
Trang 177.1 CEMENT:
Trang 227.2 Chemical Admixture:
Trang 247.3 Mineral Admixture ( Silica fume ):
Trang 257.3 Fine Aggregate, Aggregate, Coarse Aggregate and Water will be updated later when we receive test result of Raw Input Material