Thaumasite–ettringite solid solutions in degraded mortars
The thaumasite form of sulfate attack (TSA) has been observed in mortar prisms made from Portland–limestone cements after laboratory storage in 1.8% magnesium sulfate solution at 5 °C for 5 years. The prisms all showed evident signs of degradation, which increased with increasing limestone content....
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| Veröffentlicht in: | Cement and concrete research 2004-08, Vol.34 (8), p.1297-1305 |
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| container_title | Cement and concrete research |
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| creator | Torres, S.M. Kirk, C.A. Lynsdale, C.J. Swamy, R.N. Sharp, J.H. |
| description | The thaumasite form of sulfate attack (TSA) has been observed in mortar prisms made from Portland–limestone cements after laboratory storage in 1.8% magnesium sulfate solution at 5 °C for 5 years. The prisms all showed evident signs of degradation, which increased with increasing limestone content. X-ray powder diffraction indicated that a solid solution was formed in all the prisms, which was based on the crystal structure of thaumasite, but extended towards the chemical composition of ettringite. The prism made from the cement with the highest level (35%) of limestone replacement gave the greatest amount of the thaumasite solid solution and had a composition close to the thaumasite end member, whereas those cements with lower (15%, 5% and 0%) levels of replacement gave reduced amounts of the solid solution and had greater lattice parameters. The solid solutions that have been observed are compared with those reported by Barnett et al. for synthetic thaumasite samples grown from sucrose solution. |
| doi_str_mv | 10.1016/j.cemconres.2003.09.016 |
| format | Article |
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The prisms all showed evident signs of degradation, which increased with increasing limestone content. X-ray powder diffraction indicated that a solid solution was formed in all the prisms, which was based on the crystal structure of thaumasite, but extended towards the chemical composition of ettringite. The prism made from the cement with the highest level (35%) of limestone replacement gave the greatest amount of the thaumasite solid solution and had a composition close to the thaumasite end member, whereas those cements with lower (15%, 5% and 0%) levels of replacement gave reduced amounts of the solid solution and had greater lattice parameters. 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The prisms all showed evident signs of degradation, which increased with increasing limestone content. X-ray powder diffraction indicated that a solid solution was formed in all the prisms, which was based on the crystal structure of thaumasite, but extended towards the chemical composition of ettringite. The prism made from the cement with the highest level (35%) of limestone replacement gave the greatest amount of the thaumasite solid solution and had a composition close to the thaumasite end member, whereas those cements with lower (15%, 5% and 0%) levels of replacement gave reduced amounts of the solid solution and had greater lattice parameters. The solid solutions that have been observed are compared with those reported by Barnett et al. for synthetic thaumasite samples grown from sucrose solution.</description><subject>Applied sciences</subject><subject>Buildings. Public works</subject><subject>Concretes. Mortars. Grouts</subject><subject>Corrosion</subject><subject>Crystal structure</subject><subject>Durability. Pathology. Repairing. Maintenance</subject><subject>Ettringite</subject><subject>Exact sciences and technology</subject><subject>General (composition, classification, performance, standards, patents, etc.)</subject><subject>Materials</subject><subject>Sulfate attack</subject><subject>Thaumasite</subject><subject>X-ray diffraction</subject><issn>0008-8846</issn><issn>1873-3948</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><recordid>eNqFUMtOwzAQtBBIlMI3kAvcEvxK4ohTVfGSKnEpZ2trb4qrPIqdIHHjH_hDvgRXreDIZVczmtnRDiGXjGaMsuJmkxlsTd95DBmnVGS0yiJ_RCZMlSIVlVTHZEIpValSsjglZyFsIiy4UBNyu3yFsYXgBvz-_MJh8K5bR5CEvnF2N8fB9V1IXJdYXHuwaJO29wP4cE5OamgCXhz2lLzc3y3nj-ni-eFpPlukRpRySHPkigKsqIKywMJKBZLXICRAzfIcBLVWrVaCc6wlq62IiFIpWQlMVHUupuR6f3fr-7cRw6BbFww2DXTYj0FzJXklSxaF5V5ofB-Cx1pvvWvBf2hG9a4svdG_ZeldWZpWOvLReXWIgGCgqT10xoU_e14pxWgZdbO9DuO_7w69DsZhZ9A6j2bQtnf_Zv0ApoeGFA</recordid><startdate>20040801</startdate><enddate>20040801</enddate><creator>Torres, S.M.</creator><creator>Kirk, C.A.</creator><creator>Lynsdale, C.J.</creator><creator>Swamy, R.N.</creator><creator>Sharp, J.H.</creator><general>Elsevier Ltd</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>8FD</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope></search><sort><creationdate>20040801</creationdate><title>Thaumasite–ettringite solid solutions in degraded mortars</title><author>Torres, S.M. ; Kirk, C.A. ; Lynsdale, C.J. ; Swamy, R.N. ; Sharp, J.H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c374t-5e280aab08a76e6d48a42fa34aaf155a30dd8bb322ef41fd3d8b004417a139f53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Applied sciences</topic><topic>Buildings. Public works</topic><topic>Concretes. Mortars. Grouts</topic><topic>Corrosion</topic><topic>Crystal structure</topic><topic>Durability. Pathology. Repairing. Maintenance</topic><topic>Ettringite</topic><topic>Exact sciences and technology</topic><topic>General (composition, classification, performance, standards, patents, etc.)</topic><topic>Materials</topic><topic>Sulfate attack</topic><topic>Thaumasite</topic><topic>X-ray diffraction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Torres, S.M.</creatorcontrib><creatorcontrib>Kirk, C.A.</creatorcontrib><creatorcontrib>Lynsdale, C.J.</creatorcontrib><creatorcontrib>Swamy, R.N.</creatorcontrib><creatorcontrib>Sharp, J.H.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Cement and concrete research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Torres, S.M.</au><au>Kirk, C.A.</au><au>Lynsdale, C.J.</au><au>Swamy, R.N.</au><au>Sharp, J.H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Thaumasite–ettringite solid solutions in degraded mortars</atitle><jtitle>Cement and concrete research</jtitle><date>2004-08-01</date><risdate>2004</risdate><volume>34</volume><issue>8</issue><spage>1297</spage><epage>1305</epage><pages>1297-1305</pages><issn>0008-8846</issn><eissn>1873-3948</eissn><coden>CCNRAI</coden><abstract>The thaumasite form of sulfate attack (TSA) has been observed in mortar prisms made from Portland–limestone cements after laboratory storage in 1.8% magnesium sulfate solution at 5 °C for 5 years. The prisms all showed evident signs of degradation, which increased with increasing limestone content. X-ray powder diffraction indicated that a solid solution was formed in all the prisms, which was based on the crystal structure of thaumasite, but extended towards the chemical composition of ettringite. The prism made from the cement with the highest level (35%) of limestone replacement gave the greatest amount of the thaumasite solid solution and had a composition close to the thaumasite end member, whereas those cements with lower (15%, 5% and 0%) levels of replacement gave reduced amounts of the solid solution and had greater lattice parameters. The solid solutions that have been observed are compared with those reported by Barnett et al. for synthetic thaumasite samples grown from sucrose solution.</abstract><cop>New York, NY</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.cemconres.2003.09.016</doi><tpages>9</tpages></addata></record> |
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| ispartof | Cement and concrete research, 2004-08, Vol.34 (8), p.1297-1305 |
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| source | Elsevier ScienceDirect Journals |
| subjects | Applied sciences Buildings. Public works Concretes. Mortars. Grouts Corrosion Crystal structure Durability. Pathology. Repairing. Maintenance Ettringite Exact sciences and technology General (composition, classification, performance, standards, patents, etc.) Materials Sulfate attack Thaumasite X-ray diffraction |
| title | Thaumasite–ettringite solid solutions in degraded mortars |
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