How to be certified construction products manufacturer according to international standards and Qatar standards (QCS -2014 ), The subject about the construction industry and criteria to be certified (ready mix concrete,etc.) manufacturer.
- 1. Eng. Adel Al- Baghdady Quality and Conformity Qatar General Organization For Standardization
- 4. •Internal calibrations (sieves ,molds, cones) •External calibrations (Balances, machines) •Tanks (3 Nos for N.M ,5 Nos for D.M) •How to control the temperature (thermometers) •Internal frequency tests •External frequency tests •QA plan •Traceability (printer)
- 6. •Locations of the Project where each mix design is to be used •Type of cement •Max. aggregate size •Target slump/slump flow •Details of calculated water/ Cementitious material (w/c) ratio 1-General Information's
- 7. •SOURCE AND Specific gravity of all individual materials •Quantities of all individual materials (S.S.D) Kg/m³ •Water absorption of materials BY ( %) •Oven Dry Weight of materials •TOTAL VOLUME (L/m³) = 1000 • Durability Criteria QCS 2014 Table 6.1 C if required (Exposure Condition, Durability Level ) 2-Concrete Mix Proportions
- 8. •All In Aggregates Grading ( BS EN 12620, PD 6682: 1 2009 & QCS 2010 Section 5 Part 2 •Combined grading curve for aggregates 3-Combined grading for aggregate
- 9. •Locations of the Project where each mix design is to be used •Type of cement •Max. aggregate size, quantities of batch ,time •Target slump/slump flow •Details of calculated water/ Cementitious material (w/c) ratio •Compressive strength grade •Batch weight of all individual materials 4-delivery ticket (print out)
- 10. •Casting date ,Project name •Compressive strength grade •Nos of specimens at ( 7 days and 28 days) •Test results 5-Strength test reports
- 11. •determine the correction factor between cube strength and cylinder strength •shall establish at least 30 consecutive strength tests from each proposed mix •Required average compressive strength •Target Mean Strength, N/mm2 or MPa •Specified compressive strength, N/mm2 or MPa •concrete production facility have field strength test records history or does not have (new plant ) 6-Statistical calculation analysis
- 12. •determine the correction factor between cube strength and cylinder strength •shall establish at least 30 consecutive strength tests from each proposed mix •Required average compressive strength •Target Mean Strength, N/mm2 or MPa •Specified compressive strength, N/mm2 or MPa •concrete production facility have field strength test records history or does not have (new plant ) 6-Statistical calculation analysis
- 13. •determine the correction factor between cube strength and cylinder strength •shall establish at least 30 consecutive strength tests from each proposed mix •Required average compressive strength •Target Mean Strength, N/mm2 or MPa •Specified compressive strength, N/mm2 or MPa •concrete production facility have field strength test records history or does not have (new plant ) •The Contractor shall draw the upper and lower lines for warning line (average + 2 x standard deviation) and control line (average + 3 x standard deviation) 6-Statistical calculation analysis
- 14. •Physical, Chemical and Mechanical Properties for all material. •Aggregates ( fine & coarse ) •Cementitious material •Water 4-APPROVED MATERIAL SOURCES
- 15. •shall be capable of satisfactorily reading, understanding and implementing the specification as required. •Shall be certified. •shall be qualified for inspecting concrete ready mix plants and testing laboratories 5-QUALIFIED STAFF
- 16. Thank You -If you complete all previous topics you will be certified