建筑垃圾和纤维联合改性膨胀土路用性能研究  

Research on the Performance of Expansive Soil Modified by Construction Waste and Fiber

作　　者：郑和武 ZHENG Hewu(Guangxi Baima Airport Expressway Co.,Ltd.,Nanning 530028,China)

机构地区：[1]广西百马机场高速公路有限公司,广西南宁530028

出　　处：《粉煤灰综合利用》2024年第1期1-5,共5页Fly Ash Comprehensive Utilization

摘　　要：为了提高膨胀土路用性能和实现建筑垃圾资源化利用,本文研究了玻璃纤维与建筑垃圾改良膨胀土的强度特性和胀缩特性,并结合微观特征探索改良机理。研究发现:建筑垃圾和玻璃纤维均能显著提高膨胀土的强度和降低膨胀土的胀缩特性。建筑垃圾和玻璃纤维掺量过高会导致改良膨胀土内部孔隙无法有效填充以及纤维成团现象,从而影响改良膨胀土的路用性能。建筑垃圾和纤玻璃维的最佳掺量分别为40%和0.6%;微观测试结果表明纤维能为膨胀土提供附着点,从而达到增密膨胀土内部结构的效果。上述研究成果能为膨胀土改良和建筑垃圾的资源化利用提供理论基础。To improve the road performance of expansive soil and realize the resource utilization of construction waste,this paper studies the strength and expansion characteristics of expansive soil improved by glass fiber and construction waste,and explores the improvement mechanism combined with the microscopic characteristics.It is found that both construction waste and glass fiber can significantly improve the strength of expansive soil and reduce the swelling and shrinkage characteristics of expansive soil.The high content of construction waste and glass fiber will cause the internal pores of the improved expansive soil to be unable to fill effectively and the fiber clumping phenomenon,which will affect the road performance of the improved expansive soil.The optimal content of construction waste and glass fiber is 40% and 0.6% respectively.The microscopic test results show that fiber can provide adhesion points for expansive soil,thus enhancing the internal structure of expansive soil.The above research results can provide a theoretical basis for the improvement of expansive soil and the resource utilization of construction waste.

关 键 词：膨胀土 建筑垃圾 玻璃纤维 强度特征 胀缩特性 微观结构 

分 类 号：U416.1[交通运输工程—道路与铁道工程]