引用本文:陈达,庄宁,廖迎娣,黄辉.水泥土力学特性随龄期发展规律试验研究[J].水利水运工程学报,2012,(1):26-29
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水泥土力学特性随龄期发展规律试验研究
陈达1,庄宁1,廖迎娣1,黄辉2
1. 河海大学海岸灾害及防护教育部重点实验室,江苏南京,210098
2. 河海大学力学与材料学院,江苏南京,210098
摘要:
水泥土搅拌法是加固软土地基的常用方法,水泥土强度随龄期的发展规律直接影响水泥土的加固设计、施工进度安排和控制.基于我国东南沿海淤泥土特点,通过室内配比试验和力学加载试验,获得了5种以常用水泥为固化剂的水泥土试样90 d龄期内的应力应变曲线.在此基础上研究了不同固化剂和龄期对水泥土力学特性的影响,建立了水泥土抗压强度与龄期间的关系式,能根据水泥土3 d强度较准确地预测水泥土的后期强度,对于提高施工质量控制水平有重要意义.
关键词:  水泥土  强度  龄期  淤泥
DOI：
分类号:TU411.3
基金项目:国家自然科学基金青年科学基金，水利部公益性行业科研专项经费资助项目，中央高校基本科研业务费专项资金资助项目，江苏高校优势学科建设工程资助项目
Experimental study on mechanical properties of cement-soil with age
CHEN Da1,ZHUANG Ning1,LIAO Ying-di1,HUANG Hui2
1.Key Laboratory of Coastal Disaster and Defense,Hohai University,Nanjing 210098,China;2.College of Mechanics and Materials,Hohai University,Nanjing 210098,China)
Abstract:
Cement-soil mixing method is commonly used in strengthening soft soil foundation.The increase of cement-soil strength with age has a direct influence on the cement-soil reinforcement design,construction schedule arrangement and control,etc.Based on the characteristics of the silt soil of China′s southeast coast,the mechanical properties of cement-soil are studied using five common cements and their strain-stress curves at the age of 90 days are obtained through the lab mixing proportion tests and loading tests.The tests results show that the mechanical properties of cement-soil change with age and kinds of cement.The compressive strength-age formula of the cement-soil is achieved,which can be used to predict cement-soil strength according to 3 days′ strength accurately.It is helpful to improve the construction quality control.
Key words:  cement-soil  strength  age  silt soil
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