土体腐殖酸组分对水泥土强度影响效果试验

摘 要:工程实践发现水泥固化软土受土体腐殖酸成分的影响。当前，土体腐殖酸组分对水泥土固化影响已成为岩土工程研究的重要课题之一。通过在实际工程采样对水泥加固土腐殖酸组分进行定性、定量对比试验分析，以研究不同水泥掺量、不同地域水泥固化土腐殖酸组分的影响效果。试验结果表明:由红外光谱（IR）试验表现在水泥环境中胡敏酸组分的羧基量增多，水泥土阳离子交换量（CEC）随水泥掺量增加而增大；在5%、10%、20%水泥掺入比之水泥土中，由神经网络预测模型预测结果证实，富里酸组分对水泥土无侧限抗压强度影响效果较强。水泥土腐殖酸组分可与水泥产物Ca2+、AI3+反应，在水泥土环境生成钙、铝键等复合体，它们可能影响水泥水解水化反应，削减水泥所能达到的固化效果。 关键词:腐殖酸组分；红外光谱（IR）；电子扫描显微镜（SEM）；阳离子交换量（CEC）；水泥土。

TESTS FOR EFFECT OF SOIL HUMID ACID COMPONENTS ON STRENGTH OF CEMENTED SOFT SOILS

It is found in engineering practice that soft soil solidified with cement is influenced by humid acid. It has been an important issue of geotechnical engineering research to identify the effect due to components of soil humic acid to soil-cement curing. This paper uses actual soft soil samples for comparative tests. Qualitative and quantitative analyses are conducted on the composition of cement stabilized soil with humic acid. The test results show the different effects of cement with humic acid for differ...