摘要
为了探究处理武汉城中湖大量淤泥的方法,采用水泥与水玻璃(硅酸钠的水溶液)作为固化剂,从硅酸钠掺入比、水泥掺入比、龄期和应力-应变关系入手,对100多组具有不同水泥掺入比、硅酸钠掺入比的淤泥固化土试样进行了室内无侧限抗压强度试验。结果表明:硅酸钠对增强淤泥固化土的强度作用明显,最高可以达到同等条件下未掺硅酸钠时的3.6倍,水泥掺入比一定时,存在最佳硅酸钠掺入比;硅酸钠掺入比一定时,淤泥固化土强度随水泥掺入比的增大而增大;淤泥固化土强度与龄期呈近似线性关系;固化土的应力-应变曲线呈应变软化型,具有明显的应力峰值点,表现为脆性破坏。
In order to explore the treatment method of lake sludge of Wuhan, using cement - sodium silicate as curing agents, based on different sodium silicate content, cement content, ages as well as stress -strain relationships, indoor unconfined com- pressive strength tests for more than 100 groups of samples with different sodium silicate and cement mixing ratios were carried out. The test results show that sodium silicate has an obvious effect in strength improvement of solidified silt soil, making the maximum strength up to 3.6 times of the sample without sodium silicate under the same condition; when cement mixing ratio is constant, there is a best sodium silicate mixing ratio; when sodium silicate mixing ratio is constant, the strength of solidified soil rises with increment of cement mixing ratio; an approximate linear relationship between strength and ages was found ; the stress - strain curves of the solidified soil present a strain - softening type with obvious stress peak, being classified as brittle failure.
出处
《人民长江》
北大核心
2013年第24期45-48,共4页
Yangtze River
基金
湖北省自然科学基金青年杰出人才项目(2011CDA105)
关键词
疏浚淤泥
固化土
水泥-水玻璃
无侧限抗压强度
应力-应变
dredging silt
solidified soil
cement - sodium silicate
unconfined compressive strength
stress - strain
