The properties of water from a concrete plant to be used in cement composites

Construmat 2018

Klus, L.^1,2 ; Vaclavik, V.^1,2 ; Dvorsky, T.^1 ; Svoboda, J.^1,2 ; Papesch, R.^1

Institute of Environmental Engineering, Faculty of Mining and Geology, VSB-Technical University of Ostrava, Czech Republic^1

Institute of Clean Technologies for Mining, Utilization of Raw Materials for Energy Use Faculty of Mining and Geology, VSB-Technical University of Ostrava, Czech Republic^2

关键词: Cement composite;    Concrete mixing waters;    Concrete plants;    Hardened concrete;    Large amounts;    Physical and mechanical properties;    Rinsing water;    Sludge water;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/385/1/012026/pdf
DOI  :  10.1088/1757-899X/385/1/012026

来源: IOP

【 摘 要 】

This article presents the requirements for concrete mixing water and evaluates the possibilities of using recycled waste sludge water generated in a concrete plant from rinsing water of the concrete plant agitating centre and agitation trucks. The production of concrete mix requires large amount of water and for this reason, it is necessary to use this resource in an economic way. For further use of these waters, it is vital to know their detailed properties in order to maximize their potential in the design of concrete formulations for the purpose of replacing pure mixing water with recycled sludge water so as to preserve or improve the physical and mechanical properties of fresh concrete mix or hardened concrete. The results of the wastewater tests from the concrete plant confirm compliance with the limit concentrations according to CSN EN 1008. The attention should be paid to the limit of concentration of sulphates.