Trial Mix must be witnessed and verified by the S.O and conforming with MS 26 and Cl. 3.2.3-Section D. Informations must be recorded using the relevant Borang SPK.
- If a current marging of 12 N/mm2 ia adopted. The Target Mean Strength = 52 N/mm2. The average 28-day strength from the nine (9) cubes obtained from the three (3) batches of concrete shall exceed (52-3.5) N/mm2 i.e 48.5N/mm2
- The S.O shall give the approval in writing
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