Phase evolution and pulverization mechanism of self-pulverizing carbonatable clinkers

被引：15
作者：
Lv, Canyu [1 ,2 ]
Liu, Zhichao [1 ,2 ]
Wang, Fazhou [1 ]
Hu, Shuguang [1 ]
机构：
[1] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, 122 Luoshi Rd, Wuhan 430070, Peoples R China
[2] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan, Peoples R China
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2023年 / 106卷 / 02期
基金：
中国国家自然科学基金;
关键词：
calcium silicate; microstructure; powder; self-pulverizing carbonatable clinker; X-ray methods; CRYSTAL-STRUCTURE; DICALCIUM SILICATE; CALCIUM SILICATES; CEMENT; BEHAVIOR; TRANSFORMATION; STABILIZATION; STRENGTH; MAYENITE;
D O I：
10.1111/jace.18793
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
This paper investigates the phase evolution and pulverization mechanism of a self-pulverizing carbonatable clinker (SPCC) with a variety of raw material compositions. The particle size, mineral phases, and microstructure of SPCC, produced by sintering at 1400 degrees C for 3 h, were systematically studied by laser particle size testing, XRD/QXRD and SEM/EDS. Results show that clinkers sintered by raw materials with low-Ca/low-Al (Ca/Si < 1.6; Al2O3 < 10 wt.%) or high-Ca/medium-Al (Ca/Si > 2.6; Al2O3 approximate to 10 wt.%) are non-pulverized after cooling. The mineral phases of C(2)AS, CA, and C(12)A(7) are considered to facilitate clinker pulverization at low gamma-C2S contents. With the increase of Al2O3 content in raw materials, SPCC is refined in particle size, accompanied by the significant decrease in the content of calcium silicates. Based on the results, guidelines for producing SPCC are proposed.
引用
收藏
页码：1391 / 1412
页数：22
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