By using orthogonal test method, the selective study on the mixture proportion about a type of polyurethane concrete was processed.
采用正交试验，对一种聚氨酯混凝土的材料和配合比进行了选择性研究。
We studied, according to the characteristic of recycled aggregate, the mixture proportion design of recycled concrete on the basis of free water cement ratio.
根据再生骨料的特点，对基于自由水灰比再生混凝土的配合比设计进行研究。
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