Strength and Dry Shrinkage Characteristics of Steel Slag Stabilized Iron Tailings Base Materials
QIU Kaixiang
JIA Jian
ZHANG Yang
LU Xiaolei
CHENG Xin
Abstract：Steel slag-based cementitious materials(SSCM)were prepared using solid wastes such as steel slag,desulfurization gypsum and blast furnace slag.The steel slag stabilized iron tailings base materials(SIBM)were prepared by SSCM with outstanding mechanical properties.The mechanical and durability properties of SIBM were tested,and the mechanism of SSCM compensating for shrinkage in SIBM was analyzed and discussed.The results indicate that the 28-day compressive strength of SSCM with the optimal mix proportion is 31.5 MPa.When the ash content of SSCM is greater than or equal to 8%,the unconfined compressive strength of SIBM meets the design requirements for second-class highway light traffic,and its dry shrinkage is superior to that of cement stabilized iron tailings base material(CIBM).The formation of great quantity of hydration product ettringite and the improvement of pore structure are important reasons for the reduction of dry shrinkage of SIBM.
Keywords：base materialsteel slagiron tailingmechanical propertydry shrinkagemicrostructure
Publication Date：2025-06-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 544-551 )