Research on the sintering properties of excavated soil from engineering projects
CUI Jianqin
ZHOU Nannan
WANG Haiyan
HAN Junqiang
PENG Jiaxuan
QIANG Yuqin
Abstract：To achieve the resource utilization of excavated soil generated during highway construction,this study conducted sampling and analysis on the excavated soil from a highway in Min County,Gansu Province.The results indicate that the total con-tent of SiO2,Al2O3,and Fe2O3 in the sample is around 85%.As the sintering temperature increases,the water absorption rate of the sintered samples decreases,and when the sintering temperature reaches 1200℃,the water absorption rate no longer changes.When the sintering temperature exceeds 800℃,the montmorillonite minerals in the sample begin to decompose.As the temperature rises to around 1000℃,the active Al2O3,SiO2,CaO,and MgO released from the decomposition of montmorillonite undergo a firing reac-tion,forming larnite.This process is accompanied by the rearrangement and densification of microscopic crystal particles,leading to a reduction in the porosity and water absorption rate of the sintered samples.Finally,volume-stable thin-walled products were fab-ricated via press forming and sintered within the temperature range of 1000℃.This demonstrates that the sample possesses excel-lent molding stability and sintering performance.
Keywords：excavated soilsintering propertiesthin-walled sintered products
Publication Date：2025-06-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 58-62 )