The impact mechanism of molten waste incineration fly ash slag on the properties of cement-based composite materials
WANG Shengjie
ZHANG Bin
CHEN Zhen
Abstract：The effects of the dosage of municipal solid waste incineration fly ash slag(referred to as fly ash slag)on the mechanical properties,leaching toxicity characteristics,and durability of cement-based composites were studied,and microscopic testing methods such as SEM,XRD,and TG were employed to abalyze their reaction mechanisms.The results indicate that the un-confined compressive strength of cement-based materials generally decreases with increasing fly ash slag content,with minimal im-pact when the content is below 20%.When the fly ash slag content exceeds 10%,the unconfined compressive strength significantly decreases after 40 freeze-thaw cycles.After 31 wet-dry cycles,the unconfined compressive strength remains higher than that of the pure cement group.The heavy metal leaching concentrations of cement-based materials with 50%fly ash slag incorporation meet the requirements of GB 5085.3-2007"Standard for Identification of Hazardous Waste:Leaching Toxicity Test"for both 7-day and 90-day samples.
Keywords：fly ashvitrified slagcementitious compositesmechanical propertiesdurability
Publication Date：2025-11-25
Online Publishing Date：2025-12-15(First online date of this platform, not the publication date of the document)
Pages：6( 107-111,117 )