The authors introduce conditions of mix design of pavement cement concrete, demand of design, parameter of design and calculating ways, and introduce orthogonal trial method briefly .
本文简述了路面水泥砼配合比设计的依据，设计要求，设计参数及其计算方法，并概略的介绍了正交试验法。
Orthogonal trial method still has some problems that can not be ignored in practice.
正交试验法在应用过程中均存在一些不容忽略的问题。
Orthogonal trial method still has some problems that can not be ignored in practice.
正交试验法在应用过程中均存在一些不容忽略的问题。
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