Gradually, the temperature of the earth is increasing due to global warming, which has increased the operational energy demand in buildings. This energy usage can substantially be reduced using energy-efficient measures such as developing a thermally resistant building envelope. The building envelope mainly consists of walls, roof and floor, where walls play an important role in heat transfer that is a major contributor to operational energy demand. In this study, a walling material (alkali-activated bricks) was developed, where locally available industrial wastes (co-fired blended ash and stone dust (CBA-SD)) were activated by a sodium-based alkali activator and cured at an ambient temperature of around 37°C. The alkali-activated bricks were evaluated for mechanical-, physical-, thermal- and durability-related properties that are in accordance with Indian standards. The results showed that the developed alkali-activated bricks are lighter in weight and have lower thermal conductivity (0.35–0.4 W/(m K)) as compared to conventional fly-ash (FA) bricks (1.05 W/(m K)). A case of a residential building with varying building envelope and number of floors was simulated for analysing building performance using a computational approach. As compared to FA bricks, the CBA-SD brick model resulted in peak cooling load reduction by 49–51, 46–48 and 44–46% for single-, two- and three-storeyed buildings, respectively.

中文翻译：

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评估开发的碱活化砖用于节能建筑

由于全球变暖，地球的温度逐渐升高，这增加了建筑物的运行能源需求。使用节能措施，例如开发耐热建筑围护结构，可以大大减少这种能源使用。建筑物的围护结构主要由墙壁，屋顶和地板组成，墙壁在传热中起着重要作用，这是运营能源需求的主要来源。在这项研究中，开发了一种墙体材料（碱活化砖），其中，本地可用的工业废物（共烧灰和石粉共烧（CBA-SD））被钠基碱活化剂活化并在室温下固化温度约为37°C。评估了碱活化砖的机械，物理，符合印度标准的热和耐久性相关性能。结果表明，与传统的粉煤灰（FA）砖（1.05 W /（m K）相比，开发的碱活化砖重量更轻且导热系数更低（0.35-0.4 W /（m K））。 。模拟了一个具有不同建筑围护结构和楼层数的住宅建筑案例，以使用计算方法分析建筑性能。与FA砖相比，CBA-SD砖模型使单层，两层和三层建筑的峰值制冷负荷分别降低了49-51％，46-48％和44-46％。模拟了一个具有不同建筑围护结构和楼层数的住宅建筑案例，以使用计算方法分析建筑性能。与FA砖相比，CBA-SD砖模型使单层，两层和三层建筑的峰值制冷负荷分别降低了49-51％，46-48％和44-46％。模拟了一个具有不同建筑围护结构和楼层数的住宅建筑案例，以使用计算方法分析建筑性能。与FA砖相比，CBA-SD砖模型使单层，两层和三层建筑的峰值制冷负荷分别降低了49-51％，46-48％和44-46％。