椰壳纤维加筋土遗址生态注浆材料的性能
作者:
作者单位:

1.西安建筑科技大学 西部绿色建筑国家重点实验室,陕西 西安 710055;2.西安建筑科技大学 理学院,陕西 西安 710055;3.西安建筑科技大学 建筑学院,陕西 西安 710055

作者简介:

芦 苇(1988—),男,陕西延安人,西安建筑科技大学副教授,硕士生导师,博士.E-mail:luwei@xauat.edu.cn

通讯作者:

芦 苇(1988—),男,陕西延安人,西安建筑科技大学副教授,硕士生导师,博士.E-mail:luwei@xauat.edu.cn

中图分类号:

TU521

基金项目:

国家自然科学基金资助项目(52008332,51878547);中国博士后科学基金资助项目(2021M693877);西部绿色建筑国家重点实验室自主研究课题基金资助项目(LSZZ202225);西安建筑科技大学前沿交叉领域培育专项项目(X20220074)


Performance of Coir Fiber Reinforced Eco-grouting Material Used in Earthen Sites
Author:
Affiliation:

1.State Key Laboratory of Green Building in Western China, Xi’an University of Architecture & Technology, Xi’an 710055, China;2.School of Science, Xi’an University of Architecture & Technology, Xi’an 710055, China;3.School of Architecture, Xi’an University of Architecture & Technology, Xi’an 710055, China

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    摘要:

    为提升土遗址注浆料的力学性能,以椰壳纤维掺和糯米浆、烧料礓石以及黄土改性注浆料为研究对象,研究了椰壳纤维长度和掺量(质量分数)对土遗址注浆料流动性、收缩性、抗压强度和抗折强度的影响.结果表明:椰壳纤维的掺量和长度越大,浆体的流动性越低,而椰壳纤维的长度与浆体的收缩率无明显相关性;椰壳纤维良好的桥接能力可以有效提高浆体固化后的抗压强度、抗折强度和延性;椰壳纤维的长度和掺量均存在最优值,建议最优配比为纤维长度6 mm、掺量0.5%~0.6%,此时浆体固化后的抗压强度、抗折强度分别提升49.09%和32.08%;过多、过长的椰壳纤维易发生弯折、团聚,导致浆体的流动性和强度大幅降低.

    Abstract:

    To enhance mechanical property of grouting materials in earthen sites, the coir fiber mixed glutinous rice pulp, calcined ginger nuts and soil modified grouting materials were as the research object, the influence of fiber length and content(mass fraction) on grouting materials in terms of fluidity, shrinkage, compressive strength and flexural strength was investigated. The results indicate that the higher the coir fiber content and length is, the lower the slurry fluidity is, while there is no significant correlation between fiber length and shrinkage rate of the solidified slurry. The good bridging ability of coir fiber can effectively improve the compressive strength, flexural strength and ductility of the solidified slurry, and the coir fiber length and content have the optimal values. It is recommended that the best mix proportion is 6 mm in length and 0.5%-0.6% in content, so the compressive strength and flexural strength can be increased by 49.09% and 32.08%, respectively. However, excessive addition and longer coir fibers are prone to bending and agglomeration, which will lead to a substantial reduction in fluidity and mechanical strength.

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芦苇,骆望,李东波,刘秦龙,刘加平.椰壳纤维加筋土遗址生态注浆材料的性能[J].建筑材料学报,2024,27(1):90-98

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  • 收稿日期:2022-12-15
  • 最后修改日期:2023-02-07
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  • 在线发布日期: 2024-01-26
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