The influence and analysis of waste residue substitution rate on the performance of recycled concrete
SHI Haili
HE Mu
ZHU Xiaoli
KONG Deyu
Abstract：The article analyzes the composition of waste residue from a concrete mixing plant and explores the impact of different amounts of waste residue on the basic working properties and mechanical properties of recycled concrete.The experimental results show that due to the hydration reaction of concrete waste residue,its activity is low,its water absorption is strong,and its strength is poor.With the increase of waste residue content,the slump of recycled concrete reduces,and the compressive strength decreases slightly.When the substitution rate of waste residue is 60%,the slump of concrete decreases by 20.3%compared to the untreated group,and the compressive strength at 7 and 28 days decreases by 25.6%and 14.7%respectively compared to the untreated group.Further established the relationship between the density and compressive strength of recycled concrete,and ultimately obtained a 30%waste residue content as a more suitable alternative ratio,which can achieve a balance in construction performance,mechanical strength,and economy.
Keywords：ready-mixed concreterecycled concretesolid waste utilizationconcrete waste residuedesign of mix proportion
Publication Date：2025-02-24
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 37-39,48 )