EFFECT OF K2O AND MgO ON THE FORMATION AND HYDRATION ACTIVITY OF Ba-BEARING CALCIUM SULFOALUMINATE

doi:10.13168/cs.2016.0053

ISWC OpenIR > 水保所科研产出--SCI > 2017--SCI

	EFFECT OF K2O AND MgO ON THE FORMATION AND HYDRATION ACTIVITY OF Ba-BEARING CALCIUM SULFOALUMINATE
	Shen Weibo 1; Zhang Yun 1; Gong Chenchen 2; Xin Jibao 2; Gong, CC (reprint author), Univ Jinan, Shandong Prov Key Lab Preparat & Measurement Bldg, Jinan 250022, Peoples R China.
文章类型	Article
	2017
发表期刊	CERAMICS-SILIKATY
ISSN	0862-5468
通讯作者邮箱	shenwb@ms.iswc.ac.cn ; 15169028579@163.com
卷号	61 期号:1 页码:6-13
摘要	Ba-bearing calcium sulfoaluminate (C(2.75)B(1.25)A(3)$) is characterized by rapid hydration rate and volume stability, as a constituent of the low-CO2 alternative clinker. In this paper, the effect of K2O and MgO on the formation and hydration activity of Ba-bearing calcium sulfoaluminate was studied. Results show that according to DSC-TA curves 0.5-0.8 wt.% K2O can reduce the decomposition temperature of CaCO3 about 10-23 degrees C and the decomposition temperature of C(2.75)B(1.25)A(3)$ about 10-16 degrees C. And 4.0+/-5.0 wt.% MgO can reduce the decomposition temperature of CaCO3 about 10-23 degrees C and the decomposition temperature of C(2.75)B(1.25)A(3)$ about 10-16 degrees C.The effect of MgO on hydration activity of C(2.75)B(1.25)A(3)$ is a little better than that of K2O. This may be due to the reason that MgO, especially at the optimum dosage of 3.0 similar to 4.0 wt.%, favors the formation of C2.75B1.25A3$ mineral with little impurities such as BaAlO4 which is obtained from the analysis of XRD. From the released hydration heat rate and cumulative heat release results it is found that 0.5-1.1 wt.% K2O and 2.0-4.0 wt.% MgO promote the hydration of C(2.75)B(1.25)A(3)$ because of the lattice distortion and defects. Appropriate amount of MgO (2.0-4.0 wt.%) and K2O (0.8 wt.%) can improve the compressive strength and ensure it steady growth with the increase of curing ages. But 1.4 wt.% K2O and 5.0 wt.% MgO caused BaSO4 and BaAlO4 to extend the hydration of C(2.75)B(1.25)A(3)$ and reduce the compressive strengths at both early ages and late ages.
关键词	Ba-bearing Calcium Sulfoaluminate Mgo K2o Formation Hydration
学科领域	Materials Science
DOI	10.13168/cs.2016.0053
URL	查看原文
收录类别	SCI
出版地	PRAGUE 6
语种	英语
WOS记录号	WOS:000397378500002
出版者	UNIV CHEMISTRY & TECHNOLOGY, PRAGUE
引用统计
文献类型	期刊论文
条目标识符	sbir.nwafu.edu.cn/handle/361005/8065
专题	水保所科研产出--SCI_2017--SCI
通讯作者	Gong, CC (reprint author), Univ Jinan, Shandong Prov Key Lab Preparat & Measurement Bldg, Jinan 250022, Peoples R China.
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Peoples R China 2.Univ Jinan, Shandong Prov Key Lab Preparat & Measurement Bldg, Jinan 250022, Peoples R China
推荐引用方式 GB/T 7714	Shen Weibo,Zhang Yun,Gong Chenchen,et al. EFFECT OF K2O AND MgO ON THE FORMATION AND HYDRATION ACTIVITY OF Ba-BEARING CALCIUM SULFOALUMINATE[J]. CERAMICS-SILIKATY,2017,61(1):6-13.
APA	Shen Weibo,Zhang Yun,Gong Chenchen,Xin Jibao,&Gong, CC .(2017).EFFECT OF K2O AND MgO ON THE FORMATION AND HYDRATION ACTIVITY OF Ba-BEARING CALCIUM SULFOALUMINATE.CERAMICS-SILIKATY,61(1),6-13.
MLA	Shen Weibo,et al."EFFECT OF K2O AND MgO ON THE FORMATION AND HYDRATION ACTIVITY OF Ba-BEARING CALCIUM SULFOALUMINATE".CERAMICS-SILIKATY 61.1(2017):6-13.