岩土工程学报2011，Vol.33Issue(7)：1129-1134,6.
轻量土最优含水率模型与检验
Optimum water content models and tests of light weight soil
摘要
Abstract
To determine the optimum water content of light weight soil with different mixture proportions,three kinds of models for the optimum water content are put forward：-w model,qu-w model and RS-w model.It is supposed that three models can be expressed as a uniform downward opening parabola function.Analytic expressions for the optimum water content are theoretically derived.To test the above three models and to determine model coefficients,physical mechanical properties of light weight soil are studied by laboratory tests.The results show that the dry density,unconfined compressive strength and specific strength first increase and then decrease with the increase of water content,each of them has an optimum water content,and their curve shapes are similar to parabola.The measured data are analyzed based on the three models,the optimum water content calculated by models are very close to that obtained directly by the graphic method.By use of the precursors＇ research achievements,the corresponding optimum water contents of qu-w model and RS-w model are almost the same,but they are slightly different from the corresponding optimum water content of-w model.The optimum water contents of the three models are essentially the same.The optimum water content of light weight soil is the sum of physical and chemical water demand,it is an external appearance of water demand of complex physical and chemical reactions,and it is a theoretical basis for the three models to be unified.Taking RS-w model for an example,the water demand rate of mass of different components are calculated,and the results are closely related to properties of materials.关键词
轻量土/最优含水率/密度/无侧限抗压强度/比强/击实试验Key words
light weight soil/optimum water content/density/unconfined compressive strength/specific strength/compaction test分类
建筑与水利引用本文复制引用
侯天顺,徐光黎..轻量土最优含水率模型与检验[J].岩土工程学报,2011,33(7):1129-1134,6.基金项目
国家自然科学基金项目 （）
生物地质与环境地质教育部重点实验室开放基金项目 （）
