Combined impact of silicate-amorphicity and MgO-reactivity on the performance of Mg-silicate cement

被引：57
作者：
Abdel-Gawwad, H. A. [1 ]
Abd El-Aleem, S. [2 ]
Amer, A. A. [3 ]
El-Didamony, H. [3 ]
Arif, M. A. [3 ]
机构：
[1] Housing & Bldg Natl Res Ctr HBRC, Raw Bldg Mat & Proc Technol Res Inst, Cairo, Egypt
[2] Fayoum Univ, Chem Dept, Fac Sci, Al Fayyum, Egypt
[3] Zagazig Univ, Chem Dept, Fac Sci, Zagazig, Egypt
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2018年 / 189卷
关键词：
Glass waste; Ceramic waste; Mg-silicate hydrate; Reactivity; Amorphicity; MAGNESIUM OXYSULFATE CEMENT; M-S-H; REACTION-PRODUCTS; CARBONATION; HYDRATION; STRENGTH; POWDER; SLAG;
D O I：
10.1016/j.conbuildmat.2018.08.171
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This work investigated the synergistic impact of silicate- and MgO-reactivity on the performance of Mg-silicate-based cement. Ceramic waste (CW) and glass waste (GW) as two silicate sources were used. Different decarbonation temperatures (800 and 1200 degrees C) were applied on magnesium carbonate to yield MgOs with different reactivities (MgO800 and MgO1200). Highest strength and shortest setting times associated with an enhancement in silicate dissolution rate and the formation of large magnesium silicate hydrate (MSH) were recorded in case of GW-MgO800-H2O system. The use of MgO1200 resulted in the retardation of MSH-formation rate in both of GW-MgO-H2O and CW-MgO-H2O systems. Comparing with GW-MgOs set, the CW-MgOs one showed the lowest performance at all curing ages. Due to high alumina content in CW, secondary hydrotalcite-like phases were detected in CW-MgOs alongside MSH-phase. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：78 / 85
页数：8
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