Effect on Mechanical Properties and Hydration Characteristics of Fly Ash-cement System under High-temperature Steam Curing
ZHOU Yang
SHEN Pengcheng
LIU Deping
WANG Shan
BAO Wenzhong
Abstract：In order to increase early strength and achieving early demoulding in the production of precast concrete components.This study investigates the mechanical properties and hydration characteristics of a fly ash-cement system with fly ash(FA)contents under at 90℃steam curing.Results show that under steam curing conditions,the final compressive and flexural strength of pure cement mortar(0%FA specimen)are lower compared to those under standard curing,which is reduced by 15.41%and 28.27%,respectively.Similarly,the final compressive and flexural strength of the mortars containing fly ash(15%FA and 30%FA specimen)under steam curing conditions are also lower than those under standard curing conditions,which decreased by 4.27%and 13.90%for the 15%FA specimen,and by 4.16%and 9.32%for the 30%FA specimen,respectively.Especially when the fly ash content reaches 45%,there is no loss in final compressive strength or flexural strength but rather an increase by 13.71%and 26.8%,respectively.Furthermore steam curing not only promotes cement hydration rate but also enhances secondary hydration reaction between early-stage fly ash and calcium hydroxide.
Keywords：fly ashhigh-temperature steam curingmechanical propertieshydration characteristics
Publication Date：2026-01-25
Online Publishing Date：2026-01-30(First online date of this platform, not the publication date of the document)
Pages：8( 32-39 )