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EFFECT OF K2O AND MgO ON THE FORMATION AND HYDRATION ACTIVITY OF Ba-BEARING CALCIUM SULFOALUMINATE
Shen Weibo1; Zhang Yun1; Gong Chenchen2; Xin Jibao2; Gong, CC (reprint author), Univ Jinan, Shandong Prov Key Lab Preparat & Measurement Bldg, Jinan 250022, Peoples R China.
SubtypeArticle
2017
Source PublicationCERAMICS-SILIKATY
ISSN0862-5468
description.correspondentemailshenwb@ms.iswc.ac.cn ; 15169028579@163.com
Volume61Issue:1Pages:6-13
AbstractBa-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.
KeywordBa-bearing Calcium Sulfoaluminate Mgo K2o Formation Hydration
Subject AreaMaterials Science
DOI10.13168/cs.2016.0053
URL查看原文
Indexed BySCI
Publication PlacePRAGUE 6
Language英语
WOS IDWOS:000397378500002
PublisherUNIV CHEMISTRY & TECHNOLOGY, PRAGUE
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Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8065
Collection水保所科研产出--SCI_2017--SCI
Corresponding AuthorGong, CC (reprint author), Univ Jinan, Shandong Prov Key Lab Preparat & Measurement Bldg, Jinan 250022, Peoples R China.
Affiliation1.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
Recommended Citation
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.
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