Introduction - If you have any usage issues, please Google them yourself
In civil engineering, the signs of concrete constituent materials, the ratio between the number of the quantity of the relationship is with the ratio. Concrete mix is essentially to determine the cement, water, sand, gravel materials, use these four basic components proportional relationship between the three, namely: the ratio between water and cement the relationship, common water-cement ratio representation sand and the relationship between the proportion of gravel, common sand percentage representation water, mud and proportional relationship between the aggregate, often expressed in units of water. In this procedure, is based on this idea, in order to VC++ as a platform, linked databases, prepare a concrete mix proportion of management procedures.