路面免碾压贫混凝土基层工作性研究

Research on Workability of Compaction-free Lean Concrete Base

设计了一种免碾压贫混凝土基层,它可有效保证贫混凝土基层的稳定性和平整度,同时可减少施工机械、减化施工工序、缩短周期、改善施工环境.通过研究免碾压贫混凝土基层材料,分析了影响贫混凝土工作性的因素,并提出采用维勃稠度试验作为其工作性评价方法,以及维勃稠度作为其工作性评价指标,最后,采用多因素正交设计试验,并根据极差分析和方差分析,得到评价指标维勃稠度的回归公式.结果表明,维勃稠度值能够较好地评价免碾压贫混凝土的工作性.

A kind of compaction-free lean concrete（CFLC）base was put forward in this paper.The smooth-ness and stability of the base could be ensured by using compaction-free lean concrete base.Meanwhile,the construction machinery and construction cycle could be reduced.Also,construction environment could be im-proved.Factors influence workability of CFLC were analyzed,the method and index of evaluating workability of CFLC were advanced.Orthogonality test design was adopted in tests,regression formula of evaluating index-Vebe consistency value was educed.The results showed that the workability of CFLC could be evaluated by Vebe consistency value.