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设计集料级配,确定石灰粉煤灰和外加剂的最佳比例,并采用体积设计法对二灰混合料进行配合比设计;研究了二灰混合料的强度、刚度、抗收缩和抗冲刷性能随石灰粉煤灰比例的变化规律,并采用灰色关联优选最佳配合比。研究表明:增加粉煤灰比例,混合料的力学性能提高,抗冲刷性能降低,抗收缩性能无明显影响;加入NC能提高混合料的综合性能。运用基于综合路用性能的灰色关联分析,是一种能克服单指标设计缺陷的评价方法。
Designing aggregate gradation, determining the optimal proportion of lime fly ash and admixture, and designing the mixture ratio of lime-fly ash mixture by volume design method; Studying the strength, stiffness, anti-shrinkage and anti-scour Performance with lime-fly ash ratio changes, and use gray correlation optimization of the best mix. The research shows that adding the proportion of fly ash increases the mechanical properties of the mixture, reduces the anti-erosion performance and has no significant effect on shrinkage resistance. Adding NC can improve the comprehensive performance of the mixture. The use of gray relational analysis based on comprehensive road performance is an evaluation method that can overcome the design flaws of single index.