桐油和糯米汁改良土体防渗性和耐久性的研究  

Permeability and durability of soils improved by tung oil and sticky rice juice

作　　者：唐晓武[1] 王艳[1] 林廷松[2] 林捷 

机构地区：[1]浙江大学软弱土与环境土工教育部重点实验室,浙江杭州310058 [2]浙江大学建筑设计研究院岩土工程分院,浙江杭州310012 [3]中国联合工程公司,浙江杭州310022

出　　处：《岩土工程学报》2010年第3期351-355,共5页Chinese Journal of Geotechnical Engineering

基　　金：浙江省重大科技专项重点社会发展项目(2009C03008-1);中央高校基本科研业务费专项资金项目(2009QNA4026)

摘　　要：利用桐油防渗性好、易于氧化成膜的特性和糯米汁黏糊度高的特点,将桐油和糯米汁按适当比例添加到粉土、黏土和BS土(粉土中添加15%膨润土)中。改良后土体的平均渗透系数均大幅减小,达1～2个数量级,说明桐油和糯米汁对多种土类均有效。同时采用渗滤液和柴油进行渗透试验,渗透系数无明显变化,表明桐油形成的高分子膜比较稳定,没有被侵蚀或溶解;干湿循环作用后改良土的强度衰减得到减缓。总体而言,在合适配合比下,桐油和糯米汁能显著提高土体的防渗性和耐久性。Tung oil and sticky rice juice are mixed with silt,clay and BS soil（silt mixed with 15% bentonite） in proper proportion.Tung oil,with the characteristic of infiltration prevention and film formation,and sticky rice juice,with high siminess,are selected as additives.The permeabilities of all kinds of improved soils significantly decrease,by 1～2 orders of magnitude,indicating that a variety of soils can be improved by tung oil and sticky rice juice.The permeabilities of leachate and diesel exhibit no obvious changes compared with water permeability,indicating that the polymer film of tung oil is stable.The shear strength of the improved soil is reduced after drying-wetting cycle.On the whole,the improved soil has better anti-seepage property and durability.

关 键 词：防渗 桐油 糯米汁 衬垫 干湿循环 耐久性 

分 类 号：TU411[建筑科学—岩土工程]