混凝土的性能,一般均以抗压强度作为主要指标,另外,混凝土的密实性、水灰比、骨料材质、级配、水泥标号、生产工艺等对混凝土性能也有一定影响,特别是水灰比和密实性占有突出地位。经验证明:用细砂拌制混凝土较用粗砂要多用10％水泥,抗压强度反而降低10％。而水灰比对混凝土强度的影响,却远远超过10％的范围。从混凝土强度与水灰比关系曲线(图1、2)可看出。 In addition, the density of concrete, water-cement ratio, aggregate material, grading, cement label, production process, etc. have some influence on the performance of concrete, especially the water-cement ratio And compactness occupy a prominent position. Experience has shown that: with fine sand mixed with more coarse sand with 10% more cement, compressive strength but reduced by 10%. The impact of water-cement ratio on concrete strength, but far more than 10% of the range. From the concrete strength and water-cement ratio curve (Figure 1,2) can be seen.