水泥–粉煤灰–煤渣–吹填粉细砂混合料强度试验
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摘要
针对大型堆填场基层结构工程,本着就地取材节约成本的原则,利用吹填砂作为骨料,添加粉煤灰、煤渣和水泥,采用正交试验方法,编制正交设计表,配制不同比例的混合料进行无侧限抗压强度试验。采用方差对不同龄期的混合料抗压强度进行分析,并对混合料加固机理进行研究,给出了混合料最佳质量配比,即水泥20%,粉煤灰15%,煤渣10%,此时混合料的强度最大;其水泥掺量对混合料强度起着关键作用,随着龄期的增长粉煤灰与煤渣对混合料强度影响程度逐渐增强,不过煤渣对混合料初期强度影响不及粉煤灰。
By using orthogonal test to analyze the influence of cement content, fly ash content and cinder content,the non-confining compression strength test was carried out for the stability of large-scale landfill base structure and for the saving costs. The strength at different curing ages was analyzed by variance, and the reinforcement mechanism was also studied. The test results showed that the optimal ratio of cement stabilized soil under different factors is 20% of cement, 15% of fly ash, 10% of cinder, and the strength is the largest at this point. And the influence of cement content on the strength of the mixtures is the main factor, followed by the amount of fly ash and the content of cinder, and with the increase of age, the influence degree of fly ash and cinder on the strength of the mixture is gradually enhanced, and the cinder has less effect on the early strength of the compound than the fly ash.
By using orthogonal test to analyze the influence of cement content, fly ash content and cinder content,the non-confining compression strength test was carried out for the stability of large-scale landfill base structure and for the saving costs. The strength at different curing ages was analyzed by variance, and the reinforcement mechanism was also studied. The test results showed that the optimal ratio of cement stabilized soil under different factors is 20% of cement, 15% of fly ash, 10% of cinder, and the strength is the largest at this point. And the influence of cement content on the strength of the mixtures is the main factor, followed by the amount of fly ash and the content of cinder, and with the increase of age, the influence degree of fly ash and cinder on the strength of the mixture is gradually enhanced, and the cinder has less effect on the early strength of the compound than the fly ash.
引文
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[2]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):121-127.SHAO Li,LIU Songyu,DU Guangyin,et al.Experimental study on improvement of organic soil with cement and fly-ash[J].Journal of Engineering Geology,2008,16(3):121-127.
[3]吴瑞潜,谢康和,陈先华,等.水泥和粉煤灰加固红黏土的试验研究[J].工业建筑,2006,36(7):29-31.WU Ruiqian,XIE Kanghe,CHEN Xianhua,et al.Experimental research on stabilization of red clay with cement and fly ash[J].Industrial Construction,2006,36(7):29-31.
[4]王义安.粉煤灰加固土的力学特性分析[J].水道港口,1999,20(4):35-40.WANG Yi’an.Analysis of mechanical properties of fly ash reinforced soil[J].Journal of Waterway and Harbor,1999,20(4):35-40.
[5]陈峰,赖锦华.粉煤灰水泥土变形特性实验研究[J].工程地质学报,2016,24(1):96-101.CHEN Feng,LAI Jinhua.Experimental study of deformation characteristic of fly ash cement soil[J].Journal of Engineering Geology,2016,24(1):96-101.
[6]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(自然科学版),2004,32(7):884-888.JIANG Cangqin,HUANG Maosong,YAO Huan.Experimental research on stabilization of soft soil with cement and fly-ash in the Minjiang estuary[J].Journal of Tongji University(Natural Science),2004,32(7):884-888.
[7]李仕文,宁寻安,邓忠良,等.造纸污泥固化/稳定化处理技术研究[J].环境工程学报,2010,4(8):1911-1915.LI Shiwen,NING Xunan,DENG Zhongliang,et al.Study on the technology of paper making sludge solidification/stabilization[J].Chinese Journal of Environmental Engineering,2010,4(8):1911-1915.
[8]周剑波.印染污泥固化/稳定化试验研究[D].广州:广东工业大学,2011.
[9]夏克非.矿井污泥一步固化法制轻质建材的技术研究[J].煤炭技术,2012,31(1):151-153.XIA Kefei.Study of mine sludge step solidification of light construction materials[J].Coal Technology,2012,31(1):151-153.
[10]曲涛,范晓秋,刘鑫.水泥砂浆固化土抗压强度特性试验[J].河海大学学报(自然科学版),2012,40(2):173-179.QU Tao,FAN Xiaoqi,LIU Xin.Experimental study of compressive strength properties of soils stabilized by cement mortar[J].Journal of Hohai University(Natural Sciences),2012,40(2):173-179.
[11]刘鑫,范晓秋,洪宝宁.水泥砂浆固化土三轴试验研究[J].岩土力学,2011,32(6):1676-1682.LIU Xin,FAN Xiaoqiu,HONG Baoning.Experimental study of triaxial test of soils stabilized by cement mortar[J].Rock and Soil Mechanics,2011,32(6):1676-1682.
[12]范晓秋,洪宝宁,胡昕,等.水泥砂浆固化土物理力学特性试验研究[J].岩土工程学报,2008,30(4):605-610.FAN Xiaoqiu,HONG Baoning,HU Xi,et al.Physico-mechanical properties of soils stabilized by cement mortar[J].Chinese Journal of Geotechnical Engineering,2008,30(4):605-610.
[13]申莉.水泥砂浆固化土的工程特性研究[J].中外公路,2014,34(2):295-302.SHEN Li.Study on engineering characteristics of cement mortar solidified soil[J].Journal of China&Foreign Highway,2014,34(2):295-302.
[14]兰凯,黄汉盛,鄢泰宁.软土型水泥土掺砂试验研究[J].水文地质工程地质,2006,33(5):113-116.LAN Kai,HUANG Hansheng,YAN Taining.Laboratory test for cement-stabilized soft soil added with sand[J].Hydrogeology&Engineering Geology,2006,33(5):113-116.
[15]王岩,隋思涟,王爱青.数理统计与MATLAB工程数据分析[M].北京:清华大学出版社,2007:192-197.
[16]王贤昆,庞建勇,王强.复合水泥土无侧限抗压强度正交试验研究[J].长江科学院院报,2015,32(12):72-75.WANG Xiankun,PANG Jianyong,WANG Qiang.Orthogonal experimental studies on unconfined compressive strength of composite cement-soil[J].Journal of Yangtze River Scientific Research Institute,2015,32(12):72-75.
[17]淑波.水泥土添加剂的室内试验研究[D].天津:天津大学,2007.
[18]燕仲彧.水泥土添加剂室内试验研究[D].南京:东南大学,2007.
[19]钱小倩,詹书林,金南国.建筑材料[M].北京:中国建筑工业出版社,2009:37-39.
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