水泥加固土硬化机理初探  

Hardening Mechanism of Cement-Stabilized Soil

作　　者：黄新[1] 周国钧[1] 

机构地区：[1]冶金部建筑研究总院地基及地下工程研究所

出　　处：《岩土工程学报》1994年第1期62-68,共7页Chinese Journal of Geotechnical Engineering

摘　　要：水泥加固土的强度主要来自于水泥水化产物的胶结作用。本文选用四种土样制成水泥加固土，通过时其中孔隙水化学成份分析等试验得出：水泥加固土的孔隙水中Ｃａ（ＯＨ）＿２可能不饱和；土样对ＯＨ￣－，ＣａＯ的吸收量越大，则生成水化硅酸钙所必需的ＯＨ￣－，Ｃａ￣（２＋）浓度越低，因而水泥水化物生成量越少，导致水泥加固土强度越低。反之亦然。在此基础上，提出了水泥加固土的硬化反应模式。he strength of cement-stabilized soil comes mainly from the cementing effect of the cementhydrates. Cement-stabilized soil samples, made from four kinds of selected soil, were tested for analysingthe composition of the liquid, and detecting the cement hydrates in it, etc. It was revealed that in ce-ment-stabilized soil, liquid may not be Ca(OH)_2 saturated, and if so the higher the amount of CaO andOH￣- absorbed by the soil,the lower the concentration of Ca￣(++) and OH￣- in the liquid of cement-stabilized soil and the less the cement hydrates grow, so the poorer the strength of the cement-stabilized soil, and vice versa. Based on the above analysis, a model of hardening reaction in cement-stabilzed soil was proposed.

关 键 词：水泥加固土 液相成份 硬化机理 

分 类 号：TU472.6[建筑科学—结构工程]