二灰碎石基层集料配合比设计及改性研究

本文通过室内试验,首先分析了不同配比、龄期对二灰碎石无侧限抗压强度及水稳性的影响,确定二灰碎石中石灰、粉煤灰与碎石的质量比为6:12:82是最佳配比方案;其次,在确定最佳配比方案的基础上,采用新型固化剂对二灰碎石进行改性试验,结果表明新型固化剂可以大大提高二灰碎石的强度和水稳性;最后,研究改性后二灰碎石养护90天、180天的强度和水稳性,确定试样固化养护期限为90天,为固化剂的推广应用提供了参考依据。

Design of Mixed Ratio and Study on Modification for Macadam with Lime-Fly Ash

The effects of different mixed ratios and different times on compressive strength and water-sta bility of macadam with lime-fly ash were analyzed in laboratory,which have showed that the best ratio of mixing lime,fly ash and detritus is 6:12:82.In addition,a kind of solidifying admixture was added into macadam with lime-fly ash to modify the material,and the result has showed that it can further increase the compressive strength and improve the water-stability.Finally,we tested the compressive strength and the water-stability of consolidated macadam with lime-fly ash in 90 and 180 days age respectively,and con- cluded that the chemical reaction can be finished in 90 days,which provides a basis for wide application of the new solidifying admixture.