以河砂为掺料的改性生土材料抗压试验研究
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摘要
以浓度为3%的糯米浆作为生土材料的粘结剂,以不同粒径和掺量的河砂作为改性添加材料,通过对改性生土试件进行轴向抗压试验,得到改性生土试件的荷载-位移曲线,分析和讨论改性生土试件的轴向抗压强度。试验表明:以糯米浆作为改性生土材料的粘结剂可有效提高其抗压强度和延性比;以河砂作为改性添加材料,其粒径级配与掺量对改性生土试件的抗压强度和延性比有一定程度影响,掺入15%细砂+15%中砂对试件抗压强度提高效果较其他组明显,该组试件抗压强度为素土试件的1.25倍;延性比较素土试件提高了7%。糯米浆和河砂作为改性生土材料,绿色环保,不会影响生土材料固有的生态特性,并可以改善生土材料的力学性能,是一种可以推广的改性生土配方。
The glutinous rice pulp with the concentration of 3% was used as a binder and river sand with different particle sizes mixing amounts were added to produce modified raw soil materials. Through the axial compression test of modified raw soil specimens, load-displacement curves were obtained. The axial compressive strength were analyzed and discussed. The test indicates that glutinous rice pulp as binder of modified raw soil materials can improve its compressive strength and ductility ratio effectively. Taking river sand as modified raw soil material, the particle size gradation and mixing amount of river sand can have a certain influence on compressive strength and ductility ratio of modified raw soil specimens. The compressive strength of the test specimens of the group with 15% fine sand and 15% medium sand increases significantly compared with other groups, showing 1.25 times of compressive strength of the pure soil specimens. The ductility ratio is improved by 7% compared with the pure soil specimens. Glutinous rice pulp and river sand as raw soil modified materials is green and environmental, and they do not affect the inherent ecological characteristics of the raw soil materials, which can also improve the mechanical properties of raw soil materials. It can be used as generalized raw soil modified proportioning.
The glutinous rice pulp with the concentration of 3% was used as a binder and river sand with different particle sizes mixing amounts were added to produce modified raw soil materials. Through the axial compression test of modified raw soil specimens, load-displacement curves were obtained. The axial compressive strength were analyzed and discussed. The test indicates that glutinous rice pulp as binder of modified raw soil materials can improve its compressive strength and ductility ratio effectively. Taking river sand as modified raw soil material, the particle size gradation and mixing amount of river sand can have a certain influence on compressive strength and ductility ratio of modified raw soil specimens. The compressive strength of the test specimens of the group with 15% fine sand and 15% medium sand increases significantly compared with other groups, showing 1.25 times of compressive strength of the pure soil specimens. The ductility ratio is improved by 7% compared with the pure soil specimens. Glutinous rice pulp and river sand as raw soil modified materials is green and environmental, and they do not affect the inherent ecological characteristics of the raw soil materials, which can also improve the mechanical properties of raw soil materials. It can be used as generalized raw soil modified proportioning.
引文
[1] 王毅红,梁楗,张项英,等.我国生土结构研究综述[J].土木工程学报,2015,48(5):98-104.
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[16] 杨富巍,张秉坚,曾余瑶,等.传统糯米灰浆科学原理及其现代应用的探索性研究[J].故宫博物院院刊,2008(5): 105-114.
[17] 彭洪涛,张琪,李乃胜,等. 糯米浆对土遗址修复用三合土性能的影响[J]. 建筑材料学报,2011,14(5):718-722.
[18] 陈忠范,郑怡,沈小俊,等.村镇生土结构建筑抗震技术手册[M].南京:东南大学出版社,2012:18-29.
[19] 孟祥武.关天地区传统民居建筑的生态化演进研究[M].上海:同济大学出版社,2013:36-57.
[20] 土工试验方法标准:GB/T 50123—1999[S].北京:中国建筑工业出版社,1999.
[2] 王毅红,仲继清,石以霞,等.国外生土结构研究综述[J].土木工程学报,2015,48(6):81-86.
[3] 闫增峰,赵敬源,刘加平.生土建筑围护结构表面吸放湿过程试验研究[J].长安大学学报(建筑与环境科学版),2003,20(4):16-19.
[4] 石玉成,林学文.黄土地区生土建筑震害特征及防灾对策研究[J].自然灾害学报,2003,12(3):87-92.
[5] 王军,吕东军.走向生土建筑的未来[J].西安建筑科技大学报(自然科学版),2001,33(2):147-149.
[6] 许剑峰.李冰.颜婷婷.探究乡土材料的低技术生态应用——以生土材料为例[J].新建筑, 2014(4):120-123.
[7] 王毅红.樊琨.陈全杰.等.村镇生土结构房屋抗震加固措施试验研究[J].工程抗震与加固改造,2011,33(6):77-81.
[8] 王毅红,苏东军,刘挺,等.生土墙承重的村镇建筑抗震性能分析[C]//首届全国防震减灾工程学术研讨会论文集.北京:科学出版社,2005.
[9] 尚建丽,刘加平,赵西安.低能耗夯实粗粒土建筑特性的试验研究[J].西安建筑科技大学报(自然科学版),2003,35(4):325-328.
[10] 王毅红,朴永红.杜建军,等.生土坯及生土坯砌体受力性能的试验研究[C]//全国砌体结构基本与论与工程应用学术会议论文集.上海:同济大学出版社,2005:33-37.
[11] 王毅红,王春英,李先顺,等.生土结构的土料受压及受剪性能试验研究[J]. 西安建筑科技大学报(自然科学版),2006,26 (4):469-472.
[12] 马建飞.改性生土坯及其砌体基本力学性能试验研究[D].西安:长安大学. 2013.
[13] 郝传文, 改性方式对生土墙体材料耐久性影响的研究[D]. 沈阳: 沈阳建筑大学, 2011.
[14] 刘军, 袁大鹏, 周红红,等. 狗尾草对加筋土坯力学性能的影响[J]. 沈阳建筑大学学报(自然科学版),2010,426(4):720-723,733.
[15] 褚俊英, 梁海学. 矿渣-桐油-糯米汁生土墙材性能研究[J]. 科技信息,2008(30):380-391.
[16] 杨富巍,张秉坚,曾余瑶,等.传统糯米灰浆科学原理及其现代应用的探索性研究[J].故宫博物院院刊,2008(5): 105-114.
[17] 彭洪涛,张琪,李乃胜,等. 糯米浆对土遗址修复用三合土性能的影响[J]. 建筑材料学报,2011,14(5):718-722.
[18] 陈忠范,郑怡,沈小俊,等.村镇生土结构建筑抗震技术手册[M].南京:东南大学出版社,2012:18-29.
[19] 孟祥武.关天地区传统民居建筑的生态化演进研究[M].上海:同济大学出版社,2013:36-57.
[20] 土工试验方法标准:GB/T 50123—1999[S].北京:中国建筑工业出版社,1999.