基于胶浆特性的透水混凝土强度及抗冻性研究

doi:10.11896/cldb.21110275

材料导报

2022, Vol. 36

Issue (16): 21110275-8 https://doi.org/10.11896/cldb.21110275

低碳生态路面材料

基于胶浆特性的透水混凝土强度及抗冻性研究

李辉^1,*, 杨洁¹, 付凯敏², 张毅¹, 张犁¹, 朱耀庭³, 俞博⁴

1 同济大学道路与交通工程教育部重点实验室,上海 201804
2 江西赣粤高速公路股份有限责任公司科创发展中心,南昌 330000
3 江西赣江新区开发投资集团有限责任公司,南昌 330000
4 江西省长大桥隧研究设计院有限公司,南昌 330000

Investigation on the Strength and Freeze-Thaw Resistance of Pervious Concrete Based on the Properties of Cement Paste

LI Hui^1,*, YANG Jie¹, FU Kaimin², ZHANG Yi¹, ZHANG Li¹, ZHU Yaoting³, YU Bo⁴

1 The Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai 201804, China
2 Center for Technology Innovation and Development, Jiangxi Ganyue Expressway Co., Ltd., Nanchang 330000, China
3 Jiangxi Ganjiang New Area Development Investment Group Co., Ltd., Nanchang 330000, China
4 Jiangxi Long Span Bridge & Tunnel Research and Design Institute Co., Ltd., Nanchang 330000, China

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摘要透水混凝土的强度和抗冻性是影响其在重荷载交通道路和寒冷地区推广应用的关键性能。本工作研究了胶浆工作性能、强度、界面粘结性能及透水混凝土强度、抗冻性,并揭示了影响透水混凝土性能的主要因素。结果表明,通过最大浆集比可以评价胶浆和透水混凝土的工作性能,且当最大浆集比与设计浆集比接近时,透水混凝土的工作性能最佳。未改性胶浆界面冻融前后均发生粘结破坏。而改性胶浆未冻融时界面拉拔强度提升67%~156%,发生内聚破坏;冻融后界面拉拔强度显著降低,发生内聚、粘结混合破坏。工作性能良好的透水混凝土抗压强度为38.2~40.3 MPa,抗折强度为3.8~4.3 MPa,透水系数为2.85~2.92 mm/s。主成分分析结果表明,各因素对透水混凝土性能影响的占比依次为:界面性能、胶浆配合比、空隙特征共占44.8%,胶浆裹覆性能占27.5%,胶浆强度占20.0%。

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	李辉
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	张犁
	朱耀庭
	俞博

关键词: 透水混凝土强度抗冻性胶浆界面粘结

Abstract: The strength and the freeze-thaw resistance of pervious concrete are key properties for its application in heavy-load traffic roads and cold regions. The workability, the strength and the interfacial adhesion of cement paste as well as the strength and the freeze-thaw resistance of pervious concrete were investigated, and the main factors affecting the performance of pervious concrete were revealed. The results show that the wor-kability of paste and pervious concrete can be evaluated by the maximum paste-aggregate ratio, and good workability of pervious concrete can be obtained when the maximum paste-aggregate ratio is close to the designed paste-aggregate ratio. The adhesive damage occurs whether freeze-thaw tests are performed on the unmodified paste or not. On the contrary, the pull-off strength of the modified paste is 67% to 156% higher than that of the unmodified paste without freeze-thaw tests, with cohesive damage occurring, while it is significantly reduced after freeze-thaw tests,with both cohesive damage and adhesive damage appearing. The compressive strength of the pervious concrete with good workability is 38.2—40.3 MPa, the flexural strength is 3.8—4.3 MPa, and the permeability coefficient is 2.85—2.92 mm/s. The results of the principal component analysis show that the principal factors on the performance of pervious concrete are in order as follows: 44.8% for interfacial properties, mix design of paste and void characteristics, 27.5% for coating properties of paste, and 20.0% for the strength of paste.

Key words: pervious concrete strength freeze-thaw resistance cement paste interfacial adhesion

出版日期: 2022-08-25 发布日期: 2022-08-29

ZTFLH:

U414

基金资助: 中央高校基本业务经费(22120210027)

通讯作者: ^*hli@tongji.edu.cn

作者简介: 李辉,同济大学交通运输工程学院教授、博士研究生导师。2005年、2008年分别于东南大学土木工程专业本科、道路与铁道工程专业硕士毕业,2011年、2012年分别于美国加州大学戴维斯校区环境与资源经济学专业硕士、土木与环境工程专业博士毕业,2015年于美国加州大学戴维斯校区研究科学家工作结束后到同济大学工作至今。目前主要从事交通基础设施及城市环境的可持续性及弹韧性等方面的研究工作。发表论文100余篇,包括Journal of Cleaner Production、Journal of Environmental Management、Construction and Building Materials、Transportation Research Part D: Transport and Environment等;出版英文专著1部、中文专著2部;授权发明专利6项。

引用本文:

李辉, 杨洁, 付凯敏, 张毅, 张犁, 朱耀庭, 俞博. 基于胶浆特性的透水混凝土强度及抗冻性研究[J]. 材料导报, 2022, 36(16): 21110275-8.
LI Hui, YANG Jie, FU Kaimin, ZHANG Yi, ZHANG Li, ZHU Yaoting, YU Bo. Investigation on the Strength and Freeze-Thaw Resistance of Pervious Concrete Based on the Properties of Cement Paste. Materials Reports, 2022, 36(16): 21110275-8.

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http://www.mater-rep.com/CN/10.11896/cldb.21110275 或 http://www.mater-rep.com/CN/Y2022/V36/I16/21110275

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