Research on long-term durability and application of hydrothermally cured artificial aggregate
XU Jianping
HUANG Xiaolei
FANG Zhiyang
CHEN Yonghui
JIA Lifeng
CHEN Geng
HUANG Haifei
Abstract：To tackle the high energy consumption and pollution associated with conventional artificial aggregate production,this study employs industrial solid wastes including sludge,carbide slag,and desulfurization gypsum to fabricate high-strength artificial aggregates via hydrothermal curing.By varying the calcium-to-silicon ratio(Ca/Si=0.4～1.0),the resistance to water,acid,dry-wet cycles and freeze-thaw cycles was studied and compared with that of natural aggregates in practical applications.Results demon-strate that at Ca/Si=0.9,the aggregate achieves a peak unconfined compressive strength of 39.1 MPa and a softening coefficient of 0.85.Moreover,it exhibits superior resistance to acid,freeze-thaw cycles,and dry-wet cycles compared to other ratios.When crushed and applied in a water-stabilized macadam base course,the aggregate shows performance close to that of natural aggre-gates.The 7-day unconfined compressive strength,flexural tensile strength and elastic modulus of artificial aggregates are close to that of natural aggregates,and the water absorption and crushing value meet the requirements of standard JTG/T F20-2015"Tech-nical Guidelines for Construction of Highway Roadbases".
Keywords：hydrothermal curingresource utilizationartificial aggregatedurabilitycement-stabilized aggregate
Publication Date：2026-01-25
Online Publishing Date：2026-03-17(First online date of this platform, not the publication date of the document)
Pages：6( 76-81 )