固化土孔隙液Ca（OH）<sub>2</sub>饱和度对强度的影响

黄新; 宁建国; 许晟; 兰明章

doi:10.13204/j.gyjz200607004

固化土孔隙液Ca（OH）₂饱和度对强度的影响

doi: 10.13204/j.gyjz200607004

1.
1. 北京航空航天大学土木工程系北京 100083;
2.
2. 北京工业大学材料学院北京 100022

基金项目:

国家自然科学基金资助项目(批准号:50278007)

详细信息

作者简介:
黄新男 1956年4月出生博士教授博士生导师 E-mail:hx2000@buaa.edu.cn

中图分类号: TU472
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- 文章访问数: 55
- HTML全文浏览量: 8
- PDF下载量: 109
- 被引次数: 0
出版历程
- 收稿日期: 2006-02-25
- 刊出日期: 2006-07-20

INFLUENCE OF Ca(OH)₂ CONCENTRATION IN THE PORE SOLUTION ON STRENGTH INCREASING OF THE STABILIZED SOIL

1.
1. Department of Civil Engineering,Beihang University Beijing 100083;
2.
2. School of Materials,Beijing University of Technology Beijing 100022

摘要

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。
- 固化土 /
- 强度 /
- 孔隙液 /
- 离子浓度 /
- Ca(OH)2饱和度
Abstract: 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) 2in 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)2absorbedby 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) 2in 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) 22in the pore solution reach to saturation.
- stabilized soil /
- strength /
- pore solution /
- ion concentration /
- saturation of Ca( OH)2

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