基于响应曲面法的废胶粉-玄武岩纤维复合改性水泥稳定碎石性能研究  

Study on the Performance of Waste Rubber Powder-basalt Fiber Composite Modified Cement Stabilized Macadam Based on Response Surface Methodology

作　　者：盛森 SHENG Sen(Sichuan Lexi Expressway Co.,Ltd.,Chengdu City,Chengdu 610000,China)

机构地区：[1]四川乐西高速公路有限责任公司,四川成都610000

出　　处：《城市道桥与防洪》2025年第2期236-242,共7页Urban Roads Bridges & Flood Control

摘　　要：为了提高水泥稳定碎石的干缩性能和力学性能,采用玄武岩纤维和废胶粉对其进行复合改性。基于响应曲面法中的Box-Behnken模块进行了3因素3水平的正交实验,研究胶粉掺量、玄武岩纤维长度及掺量对7 d抗压强度、7 d弯拉强度和28 d干缩系数的影响。结果表明:玄武岩纤维能显著提升水泥稳定碎石的抗压和弯拉强度,对干缩性能也有一定改善;胶粉则主要改善干缩性能,但对力学性能有减弱作用。综合性能最优时的配比为:8.58‰玄武岩纤维+12 mm玄武岩纤维+4.48%胶粉,且性能优于普通水泥稳定碎石。To enhance the dry shrinkage resistance and mechanical properties of cement-stabilized macadam,a composite modification approach was employed utilizing basalt fibers and waste rubber powder.A three-factor,three-level orthogonal experiment was conducted based on the Box-Behnken module within the response surface methodology,investigating the effects of rubber powder content,basalt fiber length,and basalt fiber content on 7-day compressive strength,7-day flexural tensile strength,and the 28-day dry shrinkage coefficient.The results indicated that the incorporation of basalt fibers significantly elevated both the compressive and flexural tensile strengths of the cement-stabilized macadam,while also exhibiting a moderate improvement in dry shrinkage behavior.Conversely,the addition of rubber powder primarily targeted the enhancement of dry shrinkage performance but had a weakening effect on the mechanical properties.The optimal blend ratio for comprehensive performance was determined to be 8.58‰basalt fiber content with 12 mm basalt fibers,complemented by 4.48%rubber powder,achieving performance superior to that of conventional cement-stabilized macadam.

关 键 词：废胶粉 玄武岩纤维 水泥稳定碎石 性能研究 

分 类 号：U414[交通运输工程—道路与铁道工程]