Physical and mechanical properties of sustainable vegetal concrete exposed to extreme weather conditions
Physical and mechanical properties of sustainable vegetal concrete exposed to extreme weather conditions
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暴露于极端天气条件下的可持续植物混凝土的物理和机械性能
DOI：
10.1016/j.conbuildmat.2021.123024
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发表时间：
2021-03-25
影响因子：
7.4
通讯作者：
Chen, Bing
中科院分区：
文献类型：
--
作者：
Ahmad, Muhammad Riaz;Pan, Yongjian;Chen, Bing
研究了植物混凝土在浸水风化、室外风化、盐蚀和冻融侵蚀等极端环境条件下的耐久性。将高掺量赤泥和粉煤灰的磷酸镁水泥（MPC）胶凝材料与玉米秸秆基植物集料混合。结果发现，所有暴露于浸泡风化，户外风化，和冻融侵蚀的样品表现出质量损失，样品面积减少，抗压强度降低，这是与溶解和浸出的粘合剂。植物混凝土混合物浸泡在盐溶液中，由于在粘结剂和植物骨料表面形成盐层，质量和膨胀增加。得出的结论是，掺入粉煤灰，高压实度的样品，和预处理骨料提高了植物混凝土对极端气候条件下的耐久性性能。(c)2021爱思唯尔有限公司版权所有。
This paper studies the durability properties of vegetal concrete exposed to extreme environmental conditions including immersion weathering, outdoor weathering, salt attack, and freeze-thaw attack. Magnesium phosphate cement (MPC) binder containing high percentage of red mud and fly ash was mixed with the corn stalk based vegetal aggregates. It was found that all samples exposed to immersion weathering, outdoor weathering, and freeze-thaw attack showed a loss in mass, reduction in sample area, and decrease in compressive strength, which was associated with the dissolution and leaching out of the binder. Increase in the mass and swelling was observed for the vegetal concrete mixtures immersed into salt solution due to formation of salt layer on the surface of binder and vegetal aggregate. It was concluded that incorporation of fly ash, high compaction of samples, and pretreated aggregates improved the durability performance of vegetal concrete against extreme weather conditions.(c) 2021 Elsevier Ltd. All rights reserved.