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第三讲 混凝土配合比设计 正确地确定配合比,是制成优质经济混凝土的重要条件。 一、配合比的表示方法 配合比是指配制混凝土时,水泥、水、砂和石子用量间的比例关系,有两种常用的表示方法。一种是用一立方米混凝土中四种材料的重量表示,如水泥300公斤、水180公斤、砂720公斤、石子1200公斤。另一种是用以水泥重量为1的材料重量比表示,如上例也可写为;水泥:砂:石子=1:2.4:4.0,水灰比=0.60。
Lecture 3 Design of Concrete Mixture Properly determining the mix ratio is an important condition for producing high-quality economic concrete. First, the mix of representation method Mixture ratio refers to the preparation of concrete, cement, water, sand and gravel used in the proportion of the ratio, there are two commonly used methods of representation. One is expressed by the weight of four materials in a cubic meter of concrete, such as 300 kg of cement, 180 kg of water, 720 kg of sand, and 1200 kg of gravel. The other is the weight ratio of the material with a cement weight of 1, which can also be written as above; cement: sand: stone = 1:2.4:4.0, water-cement ratio = 0.60.