[1]刘春龙,刘乃飞,刘奉银,等.偏高岭土改善灰土强度的试验研究[J].西安建筑科技大学学报(自然科学版),2019,51(02):206-0211.[doi:10.15986/j.1006-7930.2019.02.008]
　LIU Chunlong,LIU Naifei,LIU Fengyin,et al.Experimental study on the strength of lime-soil improved by metakaolin[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2019,51(02):206-0211.[doi:10.15986/j.1006-7930.2019.02.008]
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偏高岭土改善灰土强度的试验研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
51
期数:
2019年02期
页码:
206-0211
栏目:
出版日期:
2019-04-28

文章信息/Info

Title:
Experimental study on the strength of lime-soil improved by metakaolin
文章编号:
1006-7930(2019)02-0206-06
作者:
刘春龙1; 刘乃飞2; 3; 刘奉银1; 杨珺珑1
( 1. 西安理工大学 岩土工程研究所，陕西 西安 710048；2. 西安建筑科技大学 土木工程学院，陕西 西安 710055；3. 西安建筑科技大学 陕西省岩土与地下空间工程重点实验室，陕西 西安 710055)
Author(s):
LIU Chunlong1; LIU Naifei2; 3; LIU Fengyin1; YANG Junlong1
(1. School of Civil Engineering, Xi’an University of Technology, Xi’an 710048, China；2. School of Civil Engineering, Xi’an Univ. of Arch.&Tech., Xi’an 710055, China； 3. Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering, Xi’an Univ. of Arch.&Tech., Xi’an 710055, China)
关键词:
偏高岭土; 灰土; 火山灰反应; 抗压强度; 细观结构
Keywords:
metakaolin; lime-soil; pozzolanic reaction;  compressive strength;  meso-structure
分类号:
TU444
DOI:
10.15986/j.1006-7930.2019.02.008
文献标志码:
A
摘要:
灰土被广泛用作建筑物和构筑物的基础，本文通过添加偏高岭土来进一步改善其力学性能，以期为改性灰土的应用提供试验依据。灰土强度受其组成原料如石灰含量、含水率和粘土性质的影响较大，通过控制石灰和偏高岭土含量以及水固比等因素，研究偏高岭土的加入对常规灰土材料抗压强度和软化系数的影响，并通过对含水率变化分析和扫描电镜揭示其内在机理。根据试验结果的对比分析，发现偏高岭土不仅能改善灰土材料的强度，明显缩短其强度形成时间，而且明显的提高灰土试样的软化系数。无论添加偏高岭土与否，试样抗压强度随水固比、石灰含量和偏高岭土含量均存在一个最佳配比。偏高岭土与Ca(OH)2和水发生化学反应，反应产物致使灰土试样的结构更加致密，从而改善了试样的力学性能。
Abstract:
The lime-soil is widely used as the foundation of buildings and structures. In this paper, the addition of metakaolin is used to further improve its mechanical properties, in order to provide experimental basis for the application of modified lime soil. The strength of lime soil is greatly affected by its constituent materials such as lime content, water content and clay properties. The effects of the addition of metakaolin on the compressive strength and softening coefficient of lime soil materials are studied by controlling the contents of lime and metakaolin and water-solid ratio. And reveal its intrinsic mechanism by analyzing the moisture content and scanning electron microscopy (SEM) photos. Regardless of the addition of metakaolin or not, the compressive strength of the sample has an optimal ratio with water-solid ratio, lime content and metakaolin contents. The reaction products of metakaolin and lime makes the structure of the lime soil sample more compact, thus improving the mechanical properties of the sample

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期：2018-03-15； 修改日期：2019-03-22基金项目：国家自然科学基金(41372304，10872162)，西安建筑科技大学人才科技基金项目(RC1804)，西安建筑科技大学自然科学专项（ZR18017)作者简介：刘春龙 (1989–)，男，博士研究生，主要从事岩土力学试验研究方面的工作。E-mail：lchlong1989@126.com通讯作者：刘乃飞 (1985–)，男，讲师，主要从事低温裂隙岩体多场耦合方面的研究工作。E-mail：liunaifei1985@126.com
更新日期/Last Update: 2019-05-23