无机粘结剂对工程弃渣的物理性状和稳定性的影响  

Influence of Inorganic Adhesive on the Physical Properties and Stability of Engineering Spoil

作　　者：陈述悦[1] 顾卫[1] 戴泉玉[2] 

机构地区：[1]北京师范大学地表过程与资源生态国家重点实验室,北京100875 [2]中国农村技术开发中心,北京100045

出　　处：《水土保持研究》2013年第5期86-91,共6页Research of Soil and Water Conservation

基　　金：国家自然科学基金面上项目(30870467)

摘　　要：为了确定无机粘结剂对工程弃渣物理性状和抗雨水侵蚀能力的影响,将工程弃渣与自然土壤混合配制成植物生长基质喷附在坡面模型上,开展不同降雨强度下的侵蚀实验。结果表明:无机粘结剂用量小于40kg/m3时,提高了工程弃渣的水分渗透但对水分蒸发有抑制作用,用量大于40kg/m3时无机粘结剂增加了工程弃渣的透气性,但导致工程弃渣保墒能力下降,硬度随之增加。少量的无机粘结剂对于工程弃渣的抗雨蚀能力并无提高,只有在无机粘结剂用量增加到50kg/m3(含)以上时才会显著降低泥沙流失量。无机粘结剂40kg/m3的用量为对工程弃渣物理性状影响的分水岭。而当用量达到50kg/m3临界值时,无机粘结剂开始起到帮助工程弃渣抵御雨水侵蚀的作用。The engineering spoil and natural soil were mixed into a plant growth substrate. In order to deter mine the influence of inorganic adhesive on engineering spoil＇s physical properties and ability of resistance to rain erosion, the plant growth substrate was sprayed onto the rock-slope model and erosion experiments were carried out under different rain intensity. The results are as follows, when the amount of inorganic binder was less than 40 kg/m3, inorganic adhesive could inhibit water evaporation and improve the engineering spoil＇s water penetration and hardness; however, more inorganic adhesive （~40 kg/m3） would increase breathability, decrease ability of moisture conservation, and increase hardness. The amount of sediment loss showed no reduction until the inorganic adhesive concentrations reached to 50 kg/m3. It could be concluded that the dosage of 40 kg/ma was division of the impact of inorganic binder on the physical properties. And when the amount reached critical value of 50 kg/m3 , the inorganic adhesive started to help the engineering spoil resisting rain erosion.

关 键 词：自然资源 植生基材 人工模拟降雨 无机粘结剂 工程弃渣 

分 类 号：S152.3[农业科学—土壤学]