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RESEARCH ON MECHANICAL PROPERTIES OF FLY ASH CEMENT SOIL IN YINCHAN
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摘要: 针对银川周边高矿化度湖泊相软土地基水泥土桩法处理问题,在软土天然含水量下,固定水泥掺量,应用搅拌法制备边长70.7 mm的立方体试件,标准条件养护,通过SANS万能材料试验机测定试件的强度和变形,通过扫描电子显微镜SEM进行微观结构分析,试验研究高掺量粉煤灰水泥土的应力-应变关系,强度随粉煤灰掺量、含水量、胶水比和龄期等因素变化的规律,并进行相关性分析,揭示作用机理。研究表明:在高掺粉煤灰条件下,水泥土的强度显著提高,且后期有很高的增长率,粉煤灰与水泥的最优掺量比约为3,主要作用机理为粉煤灰的水化效应和填充效应;水泥土的强度与粉煤灰掺量、胶水比、含水量之间近似为线性关系,其与胶水比的相关性最好。Abstract: On cement soil pile treatment of high mineralization lake deposits soft clay foundation in Yinchuan, cubetest specimens with 70. 7mm length of each side were prepared by mixing method under natural water content of softsoil and fixed cement content, strength and deformation of test specimens were determined by hydraulic universalmaterial testing machine, microstructure of cement soil with fly ash content, water content, water cement ratio, cement ratio and age was analyzed by SEM. The - relationship and change in strength of high fly ash cement soilwere studied, the rule and mechanism of strength were revealed. Under high fly ash condition, the strength of cementsoil was increased remarkably. Later age strength growth rate was very high. The optimum ratio of fly ash and cementwas about 3. Filling effect and hydration of fly ash were the main mechanism. The relationship between strength andfly ash content, cement water ratio, water content was approximately linear. The linear correlation between strengthand cement water ratio was the best.
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Key words:
- high content /
- fly ash /
- cement soil /
- mechanical properties
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[2] 李建军,梁仁旺.水泥土抗压强度和变形模量试验研究[J].岩土力学,2009,30(2):473-477. 周丽萍,申向东.水泥土力学性能的试验研究[J].硅酸盐通报,2009,28(2):359-365. [3] 贾尚华,申向东.碳酸钠对水泥土强度的影响[J].新型建筑材料,2011(5):13-16. [4] 韩鹏举,白晓红,赵水强.Mg 和SO 2-4相互影响对水泥土强度影响的试验研究[J].岩土工程学报,2009,31(1):72-76. [5] 陈文昭,高全臣.水泥土力学性能最优拌合水量的试验研究[J].建筑科学,2010,26(5):10-13. [6] 王立峰,翟惠云.纳米硅水泥土抗压强度的正交试验和多元线性回归分析[J].岩土工程学报,2010,32(s1):452-457. [7] 周丽萍,申向东.白忠强.外掺剂对水泥土改性效果的试验研究[J].工业建筑,2009,39(7):74-78. [8] 贾苍琴,黄茂松,姚环.水泥-粉煤灰加固闽江口地区软黏土试验研究[J].同济大学学报,2004,32(7):884-888. [9] 邵俐,刘松玉,杜广印,等.水泥粉煤灰加固有机质土的试验研究[J].工程地质学报,2008,16(3):408-414. [10] 裴向军,黄润秋,靖向党.活化粉煤灰抑制高矿化度水泥土膨胀的研究[J].岩土力学,2005,26(3):370-374. [11] 张伟锋,黄润秋,裴向军,等.水泥土环境中粉煤灰水化与活性激发研究[J].长春工程学院学报,2007,8(1):42-45. [12] 张明,白晓红.粉煤灰在深层搅拌桩中的应用[J].太原理工大学学报,2001,32(1):78-80. [13] 肖武权,冷伍明,律文田.深层搅拌法加固软弱土层的室内实验研究[J].中南大学学报,2004,35(3):490-494. [14] 崔自治.粗大粉煤灰在水泥中的应用[J].宁夏大学学报,2001,22(3):295-297. [15] 崔自治.粉煤灰活化措施研究[J].新型建筑材料,2002,258(9):22-24. [16] 崔自治.混凝土抗裂的粉煤灰效应[J].节水灌溉,2005(1):31-33. [17] 崔自治,刘少东.粉煤灰混合料的击实特性[J].宁夏工程技术,2006,5(1):80-82. [18] 崔自治,杨建森.镁渣活化措施试验研究[J].宁夏大学学报,2008,29(3):229-231. -
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