Preparation and performance study of construction waste miscellaneous fill road base material
CHEN Peng
HU Xieping
XIE Yan
GUO Yunyun
SUN Xiaoping
XU Qiyang
XIE Pengyang
Abstract：This article uses steel slag,granulated blast furnace slag,phosphogypsum and cement as cementitious materials,with concrete crushed materials and plain soil as the main materials,and uses soil solidification technology to mix and prepare base ma-terials.Its properties are studied.The results show that the composite cementitious material is 20%[in which,steel slag∶granulated blast furnace slag∶phosphogypsum∶cement is 15∶35∶42∶8,4%water glass with modulus of 1.25],40%concrete crushed material,40%plain soil,and the pavement base material has a 7 d strength of 6.9 MPa,and a 60 d splitting strength of 1.09 MPa,the 28 d water stability coefficient is＞90%.The use of water glass as an activator increased the concentration of OH-and SiO32-in the liquid phase,promoted the depolymerization and hydration speed between slag and steel slag.C-A-S-H(C-S-H)gel enters the network skeleton by filling or linking,promoting the densification of the matrix structure.
Keywords：steel slaggranulated blast furnace slagphosphogypsumroad base materialsperformance
Publication Date：2025-03-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 22-26 )