Frost Resistance of Shell Waste Pervious Vegetation-growing Concrete

WANG Dong-li; YANG Ce; ZHAO Qing-xin; LI Tong; YANG Fang-fang; ZHOU Mi

doi:10.11988/ckyyb.20191440

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Journal of Changjiang River Scientific Research Institute ›› 2020, Vol. 37 ›› Issue (12) : 152-156. DOI: 10.11988/ckyyb.20191440

HYDRAULIC STRUCTURE AND MATERIAL

Frost Resistance of Shell Waste Pervious Vegetation-growing Concrete

WANG Dong-li^1,2, YANG Ce¹, ZHAO Qing-xin², LI Tong¹, YANG Fang-fang¹, ZHOU Mi¹

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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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WANG Dong-li, YANG Ce, ZHAO Qing-xin, LI Tong, YANG Fang-fang, ZHOU Mi. Frost Resistance of Shell Waste Pervious Vegetation-growing Concrete[J]. Journal of Changjiang River Scientific Research Institute. 2020, 37(12): 152-156 https://doi.org/10.11988/ckyyb.20191440

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