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Synergistic effect of a small amount of silica aerogel powder and scrap rubber addition on properties of alkali-activated slag mortars
Construction and Building Materials ( IF 7.4 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.conbuildmat.2020.118885
Levent Bostanci

The combined use of smart and waste – based materials for energy efficiency in buildings seems as a promising solution. Due to its unmatched insulation properties, silica aerogel is an attractive smart material in cement technology compared to other conventional insulation materials. However, the high manufacturing cost of silica aerogel limits its application in the construction industry. In this study, the combined effect of silica aerogel (0%, 0.3% and 0.6% of binder weight) and scrap rubber (0%, 1.5% and 3.0% of binder weight) addition in alkali-activated slag (AAS) mortars was investigated. A small amount of silica aerogel and scrap rubber addition into mixtures was analyzed with the aim of minimizing reductions in mechanical properties with enhanced thermal insulation. Experimental results demonstrated that in the case of 3.0% scrap rubber loading at 0.3% aerogel content ratio, a remarkable synergistic effect could be observed in terms of thermal insulation up to 33%. Besides, after 2 days of curing, 48.35% and 77.55% increases in compressive toughness and post – peak compressive toughness of samples were detected, respectively. Synergistic effect of a small amount of silica aerogel and scrap rubber in calcium-silicate structure indicates a great potential for energy conservation.



中文翻译:

少量二氧化硅气凝胶粉和废橡胶的添加对碱活化矿渣砂浆性能的协同作用

结合使用基于智能和废物的材料来提高建筑的能效似乎是一个有前途的解决方案。由于其无与伦比的绝缘性能,与其他常规绝缘材料相比,二氧化硅气凝胶在水泥技术中是一种有吸引力的智能材料。但是,二氧化硅气凝胶的高制造成本限制了其在建筑行业中的应用。在这项研究中,在碱活化矿渣(AAS)砂浆中添加二氧化硅气凝胶(粘合剂重量的0%,0.3%和0.6%)和废橡胶(粘合剂重量的0%,1.5%和3.0%)的综合效果是调查。分析了将少量二氧化硅气凝胶和废橡胶添加到混合物中的目的,以最大程度地降低机械性能的降低并增强隔热性能。实验结果表明,在3的情况下。气凝胶含量为0.3%时,废橡胶的含量为0%,就高达33%的绝热而言,可以观察到显着的协同效应。此外,固化2天后,样品的抗压韧性和峰后抗压韧性分别提高了48.35%和77.55%。少量硅气凝胶和废橡胶在硅酸钙结构中的协同作用表明了巨大的节能潜力。

更新日期:2020-04-01
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