电石灰粉煤灰稳定土抗裂性能试验及评价  

Anti-cracking capability tests and evaluation of mixture of calium carbide dust and flyash

作　　者：张春会[1] 赵全胜[1] 黄鹂[1] 吕锦[1] 

机构地区：[1]河北科技大学建筑工程学院,河北石家庄050018

出　　处：《辽宁工程技术大学学报（自然科学版）》2011年第1期32-35,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：河北省自然基金资助项目(E2010000872);河北省交通厅基金资助项目(Y-090230;Y-2009122;Y-2010028;Y-060119)

摘　　要：为了评估高速公路底基层用电石灰粉煤灰稳定土在含水量和温度变化下的抗裂性能,开展了干缩试验和温缩试验研究。干缩试验结果表明:随着失水率的增加,二灰稳定土的干缩系数先增大后减小。当失水率达到3%~5%时,干缩系数达到最大值,而后急剧减小;当失水率达到6%后减幅趋于平缓。温缩试验结果表明,在40°C到30°C之间时,温缩系数快速增加,在30°C^5°C之间时,温缩系数有减小的趋势,在-5°C^10°C之间,温缩系数快速增加,并达到最值,而后又开始缓慢减小。引入干缩开裂系数和温缩开裂系数,分析了电石灰粉煤灰稳定土的抗裂性能,结果表明:建议使用的稳定土配方具有优良的抗裂性能,能作为底基层填料。To evaluate the anti-cracking capability of the mixture of the calium carbide dust and flyash,dry-shrink tests and temperature-shrink tests are performed.Dry-shrink tests show that the dry-shrink coefficient firstly increases,then decreases with the increment of the increment of the water loss rate.At the water loss rate of 3%-5%,the maximum dry-shrink coefficient appears.After the water loss rate of 6%,the dry-shrink coefficient gradually becomes stable.Temperature-shrink tests show that the temperature-shrink coefficient quickly increases from 40°C to 30°C.However the temperature-shrink coefficient decreases from 30°C to-5°C.And the temperature-shrink coefficient quickly increases from-5°C to-10°C.Then it decreases again.The dry-shrink cracking coefficient and temperature-shrink cracking coefficient are introduced,and the anti-cracking capability is studied.The researches show that the mixture of the calium carbide dust and flyash presented in this paper is of excellent crack resistance,and may be used as the filling material of highway subbase.

关 键 词：温缩试验 干缩试验 抗裂性能 

分 类 号：TD926.4[矿业工程—选矿]