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Volume 6, Issue 1
Evaluating Drinking Water Treatment Waste as a Low-Cost Cement Replacement Possessing Internal Curing Properties
(Received 17 August 2016; accepted 21 April 2017)
Published Online: 2017
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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.
Nowasell, Qiwei C.
Lehigh Cement Company, Nazareth, PA
Kevern, John T.
Department of Civil and Mechanical Engineering, University of Missouri-Kansas City, Kansas City, MO
Stock #: ACEM20160051
Title Evaluating Drinking Water Treatment Waste as a Low-Cost Cement Replacement Possessing Internal Curing Properties