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Properties of EPS RHA lightweight concrete bricks under different curing conditions

机译：不同固化条件下EPS RHA轻质混凝土砖的性能

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摘要

The depletion of non-renewable resources has become an alarming issue nowadays. Many environmentalists and researchers have been investigating the use of waste materials as a renewable resource for use especially as raw materials in construction. This paper reports on the potential use of waste rice husk ash (RHA) and expanded polystyrene (EPS) beads in producing lightweight concrete bricks. The RHA was used as a cementitious material since it is a lightweight reactive pozzolanic material. RHA was used as partial cement replacement, while the EPS was used as partial aggregate replacement in the mixes. Bricks of 215 mm x 102.5 mm x 65 mm in size were prepared in this study. The engineering properties of the bricks were investigated. Among the properties studied were hardened concrete density, compressive strength and water absorption of the EPS RHA concrete bricks. Scanning electron microscopy (SEM) analysis was also performed on the brick samples. Four types of curing conditions were employed in this study. These include full water curing, air dry curing, 3-day curing and 7-day curing. It was found that the properties of the bricks are mainly influenced by the content of EPS and RHA in the mix and also the curing condition used.
机译：如今，不可再生资源的枯竭已成为一个令人震惊的问题。许多环保主义者和研究人员一直在研究将废料用作可再生资源，特别是用作建筑的原材料。本文报道了废稻壳灰（RHA）和膨胀聚苯乙烯（EPS）珠在生产轻质混凝土砖中的潜在用途。由于RHA是轻质反应性火山灰材料，因此被用作胶结材料。 RHA用作水泥的部分替代品，而EPS用作混合物中的部分骨料替代品。在这项研究中准备了215毫米x 102.5毫米x 65毫米大小的砖块。研究了砖的工程性能。研究的性能包括EPS RHA混凝土砖的硬化混凝土密度，抗压强度和吸水率。还对砖样品进行了扫描电子显微镜（SEM）分析。本研究采用四种类型的固化条件。其中包括全水固化，风干固化，3天固化和7天固化。发现砖的性能主要受混合物中EPS和RHA的含量以及所使用的固化条件的影响。

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