Based on the concrete theory and project practice, and aimed at the mixing proportion of concrete, some key points and measures on optimization control were put forward.

根据混凝土理论和工程实践，针对工程施工混凝土配合比，提出了在混凝土设计、生产中的一些优化控制重点和措施。

This shows that the best mixing proportion of limestone powder and cement may be determined through measuring the change of compactness of mixture of limestone powder and cement.

表明石粉做掺合料时，可通过二者混合后密实度的变化来判断二者的最佳比例。

Mass configuration in wet and low-temperature condition put forward to high requirement not only for the mixing proportion of anti-freezing and anti-permeability in concrete but for construction.

长期处于潮湿、低温状态的大体积结构对混凝土的抗冻性、抗渗性的配合比设计及施工提出了更高的要求。