Study of MgO doping on sintering and carbonation properties of γ-C2S
YANG Fengming
ZHAO Sixue
RUI Yafeng
ZHANG Zheng
ZHAO Wenjing
ZHENG Yongchao
Abstract：The effects of MgO on the sintering properties,carbonation properties,and mechanical properties of γ-C2S were sys-tematically investigated.The results show that the addition of a small amount of MgO(0～10％)contributes to the improvement of the self-powdering property of the sintered body.Meanwhile,some of the Mg elements will combine with Ca and Si to produce a new phase of magnesium calcium-silicate(Merwinite).The carbonization results show that the mechanical and carbonation properties of the clinker system were optimal when the doping of MgO was 1％,in which the compressive strength reached 91.07 MPa,which was 37.09％higher than that of the blank group,and the corresponding CO2 sequestration also reached 258.29 g/kg.This may be attributed to the fact that the Mg element improved the carbonation reaction activity of γ-C2S,and the new phase Merwinite phase also exhibit-ed better carbonation activity,which in turn promoted the generation of carbonation products and higher compressive strength.
Keywords：γ-C2SMgOcarbonationmechanical propertymicrostructure
Publication Date：2024-12-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 91-96 )