长江科学院院报 ›› 2020, Vol. 37 ›› Issue (12): 152-156.DOI: 10.11988/ckyyb.20191440

• 水工结构与材料 • 上一篇    下一篇

贝壳垃圾透水植生混凝土抗冻性能研究

王冬丽1,2, 杨策1, 赵庆新2, 李通1, 杨方芳1, 周密1   

  1. 1.东北石油大学 秦皇岛校区,河北 秦皇岛 066004;
    2.燕山大学 河北省土木工程绿色建造与智能运维重点实验室,河北 秦皇岛 066004
  • 收稿日期:2019-12-19 修回日期:2020-01-19 出版日期:2020-12-01 发布日期:2020-12-28
  • 通讯作者: 赵庆新(1973-),男,河北玉田人,教授,博士,研究方向为混凝土材料力学行为与损伤失效机理。E-mail:zhaoqingxin@ysu.edu.cn
  • 作者简介:王冬丽(1979-),女,吉林松原人,副教授,博士研究生,研究方向为混凝土材料力学行为。E-mail:dongli.w@126.com
  • 基金资助:
    国家自然科学基金项目(51578477);秦皇岛市科学技术研究与发展计划项目(201801B040);河北省重点研发计划项目(19211505D);黑龙江省省属本科高校基本科研基金项目(2019YDQ-02,2020YDQ-08)

Frost Resistance of Shell Waste Pervious Vegetation-growing Concrete

WANG Dong-li1,2, YANG Ce1, ZHAO Qing-xin2, LI Tong1, YANG Fang-fang1, ZHOU Mi1   

  1. 1. Northeast Petroleum University Qinhuangdao, Qinhuangdao 066004, China;
    2. Key Laboratory of Green Construction and Intelligent Maintenance for Civil Engineering of Hebei Province, Yanshan University,Qinhuangdao 066004, China
  • Received:2019-12-19 Revised:2020-01-19 Online:2020-12-01 Published:2020-12-28

摘要: 为研究我国北方沿海不同贝壳垃圾透水混凝土的抗冻性能,选取秦皇岛海域生长的贝壳,对其制备的透水植生混凝土进行了研究。采用慢冻法,以质量损失率、强度等评价指标,结合扫描电镜(SEM)、背散射电子成像(BSE)等微观试验,分别研究了厨余牡蛎垃圾、工厂牡蛎垃圾、厨余扇贝垃圾、工厂扇贝垃圾所制备透水混凝土的冻融耐久性。结果表明:工厂垃圾相对厨余垃圾具有更好的抗冻融性能和强度;掺入硅灰可降低碱度,显著提高抗压强度,但对抗冻融性能的提高有限,经微观分析与多因素比对,确定硅灰掺量为5%;扇贝垃圾制备的透水混凝土,其抗冻融耐久性优于牡蛎垃圾透水混凝土,扇贝壳微观致密的表层结构为其抗冻性能提供了积极作用。

关键词: 透水混凝土, 贝壳垃圾, 冻融循环, 质量损失率, 硅灰掺量

Abstract: The aim of this study is to investigate the frost resistance of pervious concrete added with different seashell wastes in northern coastal areas of China. The seashells from Qinhuangdao were selected to prepare pervious vegetation-growing concrete. The freeze-thaw durability of pervious concretes made from kitchen oyster waste, factory oyster waste, kitchen scallop waste and factory scallop waste were examined by slow freezing method with mass loss rate and strength as evaluation indexes in association with Scanning Electron Microscoke(SEM), Backscattered Electron Imaging(BSE) and other microscopic tests. Results revealed that (1)factory shell waste is of better freeze-thaw resistance and strength than kitchen shell waste. The incorporation of silica fume reduced the salinity while improving the compressive strength of shell pervious concrete, and enhancing the freeze-thaw resistance to a limited extent. Through microscopic analysis and multi-factor comparison, the content of silica fume is determined at 5% as the optimal. (2)Pervious concrete containing scallop waste boasts higher freeze-thaw durability than that containing oyster waste owning to its dense microscopic surface structure.

Key words: shell waste, pervious concrete, freeze-thaw cycle, mass loss rate, silica fume

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