We have an ongoing debate in our company:
ACI 5.3.3.2; many concrete mix designs have the 3-point curves comparing compressive strength and w/c ratio. ACI requires:
1. combination of materials shall be those for proposed work.
2. trial mixtures have proportions and consistencies require for proposed work.
3. three different w/c ratios that encompass the required f'c
Q: Does this mean that only the cementitious materials and water are allowed to change? Do the aggregate, HRWR, SuperP, etc. have to be the same?
We have many submittals have completely different mixes (changing aggregate %, HRWR quantity, etc.), basically three mixes off the shelf with the same type (not %) of aggregate; this does not seem to meet the intent of ACI. COMMENTS??
ACI 5.3.3.2; many concrete mix designs have the 3-point curves comparing compressive strength and w/c ratio. ACI requires:
1. combination of materials shall be those for proposed work.
2. trial mixtures have proportions and consistencies require for proposed work.
3. three different w/c ratios that encompass the required f'c
Q: Does this mean that only the cementitious materials and water are allowed to change? Do the aggregate, HRWR, SuperP, etc. have to be the same?
We have many submittals have completely different mixes (changing aggregate %, HRWR quantity, etc.), basically three mixes off the shelf with the same type (not %) of aggregate; this does not seem to meet the intent of ACI. COMMENTS??