Evaluating Drinking Water Treatment Waste as a Low-Cost Cement Replacement Possessing Internal Curing Properties
Evaluating Drinking Water Treatment Waste as a Low-Cost Cement Replacement Possessing Internal Curing Properties
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评估饮用水处理废物作为具有内部固化特性的低成本水泥替代品
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
J. Kevern
中科院分区：
文献类型：
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作者：
Qiwei C. Nowasell;J. Kevern
随着人们对二氧化碳（CO2）排放的日益关注，水泥和建筑行业一直在探索减少隐含能源和碳足迹的每一个机会。混凝土目前包含许多可回收的工业副产品，如粉煤灰和高炉矿渣，这有助于减少填埋材料的数量，同时减少二氧化碳。所有大城市产生的大量饮用水处理废水（DWTW）促使许多人研究可能的有益利用。尽管DWTW的纯度很高，但将材料干燥成易于使用的形式所需的高水分含量和相关的高能量已经阻止了有益的使用以任何显著的能力向前发展。本研究评估了在收到的潮湿条件下使用填埋材料作为具有内部固化性能的水泥替代粉末。结果表明，对于高胶凝混合物，建议内部固化以实现最大水化，高达10%的DWTW替代提供了等效的强度和水化热，而不会对凝固时间产生负面影响。
With increasing attention to carbon dioxide (CO2) emissions, the cement and construction industry have been exploring every opportunity to reduce embodied energy and carbon footprint. Concrete currently incorporates many recycled industrial byproducts such as fly ash and blast furnace slag, which helps reduce the quantity of landfilled materials while reducing CO2. The large volume of drinking water treatment waste (DWTW) generated by all metropolitan cities has motivated many to investigate possible beneficial utilization. Despite the high purity of DWTW, high moisture content and the associated high energy required to dry the material into a readily usable form have prevented beneficial usage from moving forward in any significant capacity. This research evaluates the use of landfilled material in the as-received, moist condition as a cement replacement powder with internal curing properties. The results show that for a high cementitious mix, where internal curing would be recommended to achieve maximum hydration, up to 10 % replacement with DWTW provides equivalent strength and heat of hydration without negatively impacting setting time.