Properties of rice straw reinforced alkali activated cementitious composites
Properties of rice straw reinforced alkali activated cementitious composites
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DOI：
10.1016/j.conbuildmat.2020.120536
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发表时间：
2020-11-20
影响因子：
7.4
通讯作者：
Mangat, P. S.
中科院分区：
文献类型：
--
作者：
Chinh Van Nguyen;Mangat, P. S.
研究了稻草增强碱活化胶凝复合材料（AACC）的性能。将未经处理的稻秆和NaOH处理过的稻秆按粘结剂重量的1%、2%、3%的比例分别加入到混合料中。采用扫描电镜（SEM）和x射线衍射（XRD）对稻草进行了表征。研究了aacc的力学性能、吸水率、干燥收缩率和干湿循环耐久性。扫描电镜还研究了AACC退化的机制。结果表明：稻秆对aacc的抗弯抗压强度、干湿循环耐久性、干燥收缩率大幅降低、吸水率均有显著的正向影响；此外，碱处理是增强秸秆与基质结合的有效方法，从而提高aacc的性能。(C) 2020 Elsevier Ltd.版权所有。
The paper investigates the characteristics of rice straw reinforced alkali activated cementitious composites (AACC). The untreated and NaOH treated rice straw at the proportion of 1%, 2%, 3% by weight of binder was added to the mixes. Characteristics of rice straw have been studied by using SEM and XRD. Mechanical properties, water absorption, drying shrinkage and durability under wet/dry cycling have been investigated to evaluate the performance of the AACCs. SEM was also used to investigate the mechanism of deterioration of the AACC. The results show that rice straw has very significant positive effects on the performance of AACCs including increase in flexural and compressive strength, durability under wet/dry cycling, large reduction in drying shrinkage, and water absorption. In addition, alkali treatment is an effective method for enhancing bond between the rice straw and the matrix leading to improved performance of AACCs. (C) 2020 Elsevier Ltd. All rights reserved.