高强度混凝土的配合比设计应该遵循低水灰比、低砂率、高骨胶比的原则，这样才能达到比较理想的效果。
The mix design of strong concrete should follow the principles of low water-cement ratio, low sand ratio and high bone-glue ratio, thus the relatively satisfying effect can be achieved.
通过再生旧沥青混合料用做柔性基层的工程实例，介绍了冷拌再生沥青混合料配合比设计的原则、方法、步骤及最佳配合比的验证。
By an practical project of cold recycling of asphalt mixture as flexible base, the principle and approach of proportioning design of recycling material are introduced.
采用现代混凝土配合比设计理念，通过试验，研究了人工砂高性能混凝土配合比的设计原则。
Using modern design concept of concrete mixture ratio, researches were made on the design principle of the mixture ratio of high performance concrete with artificial sand through tests.
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