植被混凝土复合抗冻剂的组配试验  

Development of composite antifreeze tovegetation-growing concrete

作　　者：周明涛[1,2] 胡欢[2] 胡旭东 

机构地区：[1]三峡地区地质灾害与生态环境湖北省协同创新中心,湖北宜昌443002 [2]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《中国水土保持科学》2014年第4期62-66,共5页Science of Soil and Water Conservation

基　　金：三峡大学博士启动基金"植被混凝土生态基材胀缩恢复性研究"(KJ2011B006);国家自然科学基金"植被混凝土生态防护基材微生物活性的变化机制与增强方法研究"(51278281)

摘　　要：借鉴水泥土抗冻改良方法,结合植被混凝土自身特点与功能,选取棕纤维、硅粉和表面活性剂为复合抗冻剂的原材料。参照混凝土抗冻性能检测试验,通过评价冻融循环过程中试样质量损失率与相对动弹性模量变化情况,试验得出对植被混凝土抗冻性能提升效应最明显的复合抗冻剂质量配比方案为棕纤维∶硅粉∶表面活性剂=1∶3∶0.05,且其掺加量为植生土干质量的1.5%时效果最佳。研究成果可为高寒地区裸露岩石边坡的植被修复提供理论依据。Enlightened by the antifreezing improvement of cement-soil composite,and considering the characteristics and functions of vegetation-concrete mixture,we chose palm fiber,silicon powder and surface active agent as the antifreeze raw materials of the vegetation-growing concrete.Based on the antifreezing test to the concrete,the optimum antifreeze composite ratio is put forward through the evaluation of relative dynamic elastic modulus and mass loss rate in the process of freeze-thaw cycles.When the mass ratio of palm fiber,silicon powder and surface active agent is 1：3：0.05,and the additive amount reaches 1.5％ of the weight of the plant generates,the best effect will be obtained.Our study will provide theoretical foundation for slope ecology restoration in alpine region.

关 键 词：植被混凝土 生态基材 质量损失率 相对动弹性模量 

分 类 号：TU449[建筑科学—岩土工程]