Alkali Aggregate Reaction in Alkali Slag Cement Mortars
By means of “Mortar Bar Method”,the ratio of cement to aggregate was kept as a constant 1:2.25,the water-cement ratio of the mixture was 0.40,and six prism specimens were prepared for each batch of mixing proportions with dimensions of 10×10×60mm^3 at 38±2℃ and RH≥95%,the influences of content and p...
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| Veröffentlicht in: | Journal of Wuhan University of Technology. Materials science edition 2002-09, Vol.17 (3), p.60-62 |
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| creator | Chen, You-Zhi Pu, Xin-Cheng Yang, Chang-Hui Ding, Qing-Jun |
| description | By means of “Mortar Bar Method”,the ratio of cement to aggregate was kept as a constant 1:2.25,the water-cement ratio of the mixture was 0.40,and six prism specimens were prepared for each batch of mixing proportions with dimensions of 10×10×60mm^3 at 38±2℃ and RH≥95%,the influences of content and particle size of active aggregate,sort and content of alkali component and type of slag on the expansion ratios of alkali-activated slag cement(ASC) mortars due to alkali aggregate reaction(AAR) were studied.According to atomic absorption spectrometry,the amount of free alkali was measured in ASC mortars at 90d.The results show above factors affect AAR remarkably,but no dangerous AAR will occur in ASC system when the amount of active aggregate is below 15% and the mass fraction of alkali is not more than 5%(Na2O),Alkali participated in reaction as an independent component,and some hydrates containing alkali cations were produced,free alkalis in ASC system can be reduced enormously.Moreover,slag is an effective inhibitor,the possibility of generating dangerous AAR in ASC system is much lower at same conditions than that in ordinary Portland cement system. |
| doi_str_mv | 10.1007/bf02838542 |
| format | Article |
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Materials science edition, 2002-09, Vol.17 (3), p.60-62</ispartof><rights>Wuhan University of Technology 2002</rights><rights>Editorial Office of Journal of Wuhan University of Technology-Materials Science Edition 2002.</rights><rights>Copyright © Wanfang Data Co. Ltd. All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c378t-c6ded883c1afb2301c2f5befcaa92782b30fe2755cc05709f8418b349e9222b13</citedby><cites>FETCH-LOGICAL-c378t-c6ded883c1afb2301c2f5befcaa92782b30fe2755cc05709f8418b349e9222b13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/84253X/84253X.jpg</thumbnail><link.rule.ids>314,776,780,27903,27904</link.rule.ids></links><search><creatorcontrib>Chen, You-Zhi</creatorcontrib><creatorcontrib>Pu, Xin-Cheng</creatorcontrib><creatorcontrib>Yang, Chang-Hui</creatorcontrib><creatorcontrib>Ding, Qing-Jun</creatorcontrib><title>Alkali Aggregate Reaction in Alkali Slag Cement Mortars</title><title>Journal of Wuhan University of Technology. Materials science edition</title><addtitle>Journal of Wuhan University of Technology. Materials Science Edition</addtitle><description>By means of “Mortar Bar Method”,the ratio of cement to aggregate was kept as a constant 1:2.25,the water-cement ratio of the mixture was 0.40,and six prism specimens were prepared for each batch of mixing proportions with dimensions of 10×10×60mm^3 at 38±2℃ and RH≥95%,the influences of content and particle size of active aggregate,sort and content of alkali component and type of slag on the expansion ratios of alkali-activated slag cement(ASC) mortars due to alkali aggregate reaction(AAR) were studied.According to atomic absorption spectrometry,the amount of free alkali was measured in ASC mortars at 90d.The results show above factors affect AAR remarkably,but no dangerous AAR will occur in ASC system when the amount of active aggregate is below 15% and the mass fraction of alkali is not more than 5%(Na2O),Alkali participated in reaction as an independent component,and some hydrates containing alkali cations were produced,free alkalis in ASC system can be reduced enormously.Moreover,slag is an effective inhibitor,the possibility of generating dangerous AAR in ASC system is much lower at same conditions than that in ordinary Portland cement system.</description><subject>Alkali-aggregate reactions</subject><subject>Cement</subject><subject>Hydrates</subject><subject>Mortars (material)</subject><subject>Portland cements</subject><subject>Slag</subject><subject>Slag cements</subject><subject>Studies</subject><subject>Water-cement ratio</subject><subject>建筑材料</subject><subject>混凝土</subject><subject>碱－集料反应</subject><issn>1000-2413</issn><issn>1993-0437</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNp9kU9PwzAMxSMEEmNw4RMUIXEAFRynadLjmBgggZD4c47SLOm6dS0knbZ9ezptcODAyZb80_OzHyGnFK4pgLjJHaBkkie4R3o0y1gMCRP7XQ8AMSaUHZKjEKYACbA07RExqGa6KqNBUXhb6NZGr1abtmzqqKyj3fCt0kU0tHNbt9Fz41vtwzE5cLoK9mRX--RjdPc-fIifXu4fh4On2DAh29ikYzuWkhmqXY4MqEHHc-uM1hkKiTkDZ1FwbgxwAZmTCZU5SzKbIWJOWZ9cbXWXuna6LtS0Wfi626iWk2I9Xq1yZREAodNOO_piS3_65mthQ6vmZTC2qnRtm0VQKKhINh_qk_M_4K9uZyvNEoHI_qMopQxTzvnG4uWWMr4JwVunPn05136tKKhNKup29JNKB5_t4ElTF19ld1GuzcyVlVUCuEzTjH0DiOuGYw</recordid><startdate>20020901</startdate><enddate>20020901</enddate><creator>Chen, You-Zhi</creator><creator>Pu, Xin-Cheng</creator><creator>Yang, Chang-Hui</creator><creator>Ding, Qing-Jun</creator><general>Springer Nature B.V</general><general>Wuhan University of Technology%Chongqinq University</general><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>W92</scope><scope>~WA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8AO</scope><scope>8BQ</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>7U5</scope><scope>L7M</scope><scope>2B.</scope><scope>4A8</scope><scope>92I</scope><scope>93N</scope><scope>PSX</scope><scope>TCJ</scope></search><sort><creationdate>20020901</creationdate><title>Alkali Aggregate Reaction in Alkali Slag Cement Mortars</title><author>Chen, You-Zhi ; 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| subjects | Alkali-aggregate reactions Cement Hydrates Mortars (material) Portland cements Slag Slag cements Studies Water-cement ratio 建筑材料 混凝土 碱－集料反应 |
| title | Alkali Aggregate Reaction in Alkali Slag Cement Mortars |
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