Experimental study on the application of zero discharge of wastewater from ready-mixed concrete production
WU Jin
CHEN Xudong
SHANG Kai
ZHENG Junlin
NING Yingjie
Abstract：To realize the resource utilization of zero-discharge production wastewater from the ready-mixed concrete mixing plant,this experiment combined the microstructure detection techniques of the mercury-pressure method,scanning electron micro-scope,and X-ray diffraction to investigate the role and influence law of wastewater admixture and its storage time on the mechan-ical properties and microstructure of concrete.The results showed that the 7-day compressive strength of mortar with 100％wastewater admixture increased by 35％and the 28-day compressive strength increased by 16％compared with that of ordinary mortar,while the compressive strength of specimens with other wastewater admixtures increased to a certain extent;the alkaline en-vironment provided by wastewater was beneficial to promote the hydration reaction of cement.The micro-particles contained in the wastewater of ready-mixed concrete production play a filling and bonding role in the microstructure of concrete and improve the compactness of concrete.
Keywords：ready-mixed concrete production wastewatercement mortarconcretemechanical propertiesmicrostructure
Publication Date：2023-11-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 58-63 )