摘要
物理力学性质相同的土样掺加等量水泥制备的固化土强度通常有很大差别。通过选取几组物理力学性质相近的典型土样,掺加不同比例的水泥和Ca(OH)2制备成固化土,测定了固化土孔隙液离子浓度和固化土强度。研究表明:由于土样对Ca(OH)2的消耗,可能导致固化土孔隙液中Ca(OH)2不饱和,进而影响了水化硅酸钙的生成量;不同土样对Ca(OH)2消耗量不同,导致在掺加同量水泥时水化物的生成量不同,因此固化土强度不同。土样各种化学性质的影响因素对固化土强度的影响可归结为对孔隙液Ca(OH)2饱和度的影响。对于物理力学性质相近的土样,在满足孔隙液Ca(OH)2饱和的条件下,掺入同量水泥的固化土强度相同。
At same cement content, strength difference between stabilized soil samples prepared from different soil samples with similar physical characteristics obviously. Pore solution were squeezed from the stabilized soil samples with various cement contents, concentration of ions in the solution and strength of the stabilized soil samples were measured. The result shows that due to soil absorbing of Ca （ OH）2 , the concentration of Ca （ OH）2 in the pore solution may not reach to saturation, in turn the CSH gel generated by cement hydration may decrease; the higher the amount of Ca（OH）2 absorbed by soil, the less CSH gel generated by same dosage of cement, so the poorer the strength of the stabilized soil sample. The influence of various chemical characteristics of soil on the strength of the stabilized soil is boiled down to the influence on the concentration of Ca（OH）2 in the pore solution. The strength of stabilized soil samples made from different soil samples with similar physical characteristics are almost the same when the concentration of Ca （OH）2 in the pore solution reach to saturation.
出处
《工业建筑》
CSCD
北大核心
2006年第7期19-24,共6页
Industrial Construction
基金
国家自然科学基金资助项目(批准号:50278007)
