集料级配对二灰碎石抗压强度的影响

The Effects of Aggregate Gradation on Lime-fly Ash Bound Macadam's Compression Strength

根据室内试验的结果,采用直观分析和方差分析方法分析了集料级配对二灰碎石混合料不同龄期抗压强度的影响。结果表明,集料级配对二灰碎石的抗压强度有显著影响;采用偏粗级配时,二灰碎石的前期强度较高,而采用偏细级配时,二灰碎石的后期强度较高;当集料不含小于0.6mm的颗粒时,存在使二灰碎石强度达到最大的集料最佳含量;间断级配时间断区段的粒径越大,二灰碎石的强度越高。

The effects of aggregate gradation on lime-fly ash bound macadam's compression strength in varied ages were analyzed.The direct-vision and variance analysis were adopted in indoor tests.The result indicated that the aggregate gradation has a remarkable effect on the compression strength.The early strength is higher with bias-coarse gradation while the later strength is higher with bias-fine gradation.When the aggregate has no grain finer than (0.6 mm),there is an optimum content of aggregate which makes the highest strength.The bigger the size of intermittent division in discontinuous gradation is adopted,the higher the strength becomes.