Reproportioning Concrete Mixes

摘要: Integral to concrete mix proportioning are preparing trial mixes and balancing such factors as reasonable economy against placement, strength, and durability requirements. It is necessary to determine the water-cement and aggregate-cement ratios to satisfy workability requirements and obtain the target 28-day compressive strength. There is no direct, simple method by _ which the characteristics of cement, namely, fineness and chemical composition, can be considered in proportioning concrete mixes. Based on the …