Mechanism Analysis and Performance Evolution of Full Negative Temperature Alkali-Activated Slag Mortar with OPC
ZHANG Hong'en
HE Bei
XU Jin
SONG Jinxuan
JIANG Zhengwu
Abstract：The influence and mechanisms of ordinary Portland cement(OPC)dosage on the performance of full negative temperature(mold and cure at-10℃)alkali-activated slag mortar(AASM)were systematically investigated.The results demonstrate that the incorporation of OPC can enhance the full-age compressive strength of AASM cured at full negative temperature,and the optimal OPC dosage is 3%of the total binder mass.Under this dosage,the 1,7 and 28 d compressive strength of AASM are 5.0%,23.5%and 17.8%higher than that without OPC,respectively.OPC promotes the hydration degree of slag at negative temperature,leading to an increase in the hydration product amount and densification of the microstructure,thereby improving the compressive strength of AASM cured entirely at negative temperature.
Keywords：full negative temperaturealkali-activated slag mortarcompressive strengthmicrostructuremercury intrusion porosimetry
Publication Date：2026-02-28
Online Publishing Date：2026-04-07(First online date of this platform, not the publication date of the document)
Pages：8( 193-200 )