用于基层的氯氧镁水泥稳定碎石胶凝材料组成分析

Composition Analysis of Magnesium Oxychloride Cement Stabilized Macadam Cementitious Material for Base

为确定氯氧镁水泥稳定碎石应用在路面基层结构中合理的胶凝材料组成,解决击实试验中变量不恒定的问题,采用相理论推导和正交设计试验,利用矩阵分析法,对影响氯氧镁水泥稳定碎石力学性能的因素进行了分析和验证。结果表明,相理论配比结合正交试验所得的配比最优组合与击实试验所得的配比结果一致,确定了氯氧镁水泥稳定碎石胶凝材料的最佳配比范围为轻烧粉掺量3.5%~4%,MgO/MgCl_(2)摩尔比6~7,MgCl_(2)浓度20%~22%。氯氧镁水泥稳定碎石混合料可以通过相理论配比来进行材料组成正交设计,解决了通过击实试验无法解决的MgCl_(2)浓度的问题,为氯氧镁水泥稳定粒料基层的后续研究奠定了理论基础。

In order to determine the reasonable cementing material composition of magnesium oxychloride cement stabilized crush stone in road base structure,and solve the problem of variable instability in compaction test,the phase theory and orthogonal design experiments were used to analysis influence factors of mechanical properties for the magnesium oxychloride cement stabilized crush stone by matrix analysis.The results showed that the optimal combination of phase theory ratio combined with orthogonal test was consistent with the results of compaction test.The optimal ratio range of magnesium oxychloride cement stabilized crush stone cementing material was determined as 3.5%-4%of light sintering powder content,6-7 of the MgO/MgCl_(2)molar ratio,and 20%-22%of MgCl_(2)concentration.The experimental results show that the magnesium oxychloride cement stabilized crush stone mixture can be used for material composition orthogonal design through the theoretical ratio of the phase,which solves the problem of MgCl_(2)concentration that cannot be solved through the compaction test,and lays a theoretical foundation for the follow-up research on the magnesium oxychloride cement stabilized granule base.