Durability of phosphogypsum-based supersulfated cement mortar against external attack by sodium and magnesium sulfate
Supersulfated cements (SSCs) are composed primarily of blast furnace slag, calcium sulfate, and a small content of alkaline activator. SSC has been discussed in the literature because it has a low content of clinker and consequently low CO2 emissions. However, the current absence of durability studi...
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| Veröffentlicht in: | Cement and concrete research 2020-10, Vol.136, p.106172, Article 106172 |
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| creator | Pinto, Sabrina R. Angulski da Luz, Caroline Munhoz, Guilherme S. Medeiros-Junior, Ronaldo A. |
| description | Supersulfated cements (SSCs) are composed primarily of blast furnace slag, calcium sulfate, and a small content of alkaline activator. SSC has been discussed in the literature because it has a low content of clinker and consequently low CO2 emissions. However, the current absence of durability studies is the main challenge for the large-scale implementation of SSC as a building material. The objective of this study was to investigate the behavior of phosphogypsum-based SSC mortar under sulfate attack. SSC mortars were submitted to MgSO4 and Na2SO4 solutions. Portland cements were also used as a comparison. SSC mortar showed good durability against sodium sulfate attack but presented an expansive behavior when exposed to magnesium sulfate. This behavior in the MgSO4 solution was attributed to the low portlandite reserve, which anticipated the attack of C-S-H. Besides, the non-formation of the brucite layer accelerated the entry of this type of sulfate. |
| doi_str_mv | 10.1016/j.cemconres.2020.106172 |
| format | Article |
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SSC has been discussed in the literature because it has a low content of clinker and consequently low CO2 emissions. However, the current absence of durability studies is the main challenge for the large-scale implementation of SSC as a building material. The objective of this study was to investigate the behavior of phosphogypsum-based SSC mortar under sulfate attack. SSC mortars were submitted to MgSO4 and Na2SO4 solutions. Portland cements were also used as a comparison. SSC mortar showed good durability against sodium sulfate attack but presented an expansive behavior when exposed to magnesium sulfate. This behavior in the MgSO4 solution was attributed to the low portlandite reserve, which anticipated the attack of C-S-H. Besides, the non-formation of the brucite layer accelerated the entry of this type of sulfate.</description><identifier>ISSN: 0008-8846</identifier><identifier>EISSN: 1873-3948</identifier><identifier>DOI: 10.1016/j.cemconres.2020.106172</identifier><language>eng</language><publisher>Elmsford: Elsevier Ltd</publisher><subject>Blast furnace slags ; Brucite ; Calcium sulfate ; Clinker ; Construction materials ; Durability ; Expansion ; Magnesium hydroxide ; Mortar ; Mortars (material) ; Phosphogypsum ; Portland cements ; Sodium sulfate ; Sulfate attack</subject><ispartof>Cement and concrete research, 2020-10, Vol.136, p.106172, Article 106172</ispartof><rights>2020 Elsevier Ltd</rights><rights>Copyright Elsevier BV Oct 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c343t-70f0040aaf4288b2af6391973bb63c8224f6b7572d597ae5f73795755dd5a4473</citedby><cites>FETCH-LOGICAL-c343t-70f0040aaf4288b2af6391973bb63c8224f6b7572d597ae5f73795755dd5a4473</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0008884620303999$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Pinto, Sabrina R.</creatorcontrib><creatorcontrib>Angulski da Luz, Caroline</creatorcontrib><creatorcontrib>Munhoz, Guilherme S.</creatorcontrib><creatorcontrib>Medeiros-Junior, Ronaldo A.</creatorcontrib><title>Durability of phosphogypsum-based supersulfated cement mortar against external attack by sodium and magnesium sulfate</title><title>Cement and concrete research</title><description>Supersulfated cements (SSCs) are composed primarily of blast furnace slag, calcium sulfate, and a small content of alkaline activator. 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Besides, the non-formation of the brucite layer accelerated the entry of this type of sulfate.</description><subject>Blast furnace slags</subject><subject>Brucite</subject><subject>Calcium sulfate</subject><subject>Clinker</subject><subject>Construction materials</subject><subject>Durability</subject><subject>Expansion</subject><subject>Magnesium hydroxide</subject><subject>Mortar</subject><subject>Mortars (material)</subject><subject>Phosphogypsum</subject><subject>Portland cements</subject><subject>Sodium sulfate</subject><subject>Sulfate attack</subject><issn>0008-8846</issn><issn>1873-3948</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqFUE1r3DAQFaGFbNP-hgp69kZftuRjSJoPCOSSnMVYlrbari1HI5fsv6_NhlxzGIY3vPdm5hHyk7MtZ7y53G-dH1was8etYGKdNlyLM7LhRstKtsp8IRvGmKmMUc05-Ya4X2AjpNmQ-WbO0MVDLEeaAp3-JFxqd5xwHqoO0PcU58lnnA8ByoKWZX4sdEi5QKawgzhiof6t-DzCgUIp4P7S7kgx9XEeKIw9HWA3elzRu8138jXAAf2P935BXm5_P1_fV49Pdw_XV4-Vk0qWSrPAmGIAQQljOgGhkS1vtey6RjojhApNp2st-rrV4OugpW5rXdd9X4NSWl6QXyffKafX2WOx-zSvd6IVSpm25qrlC0ufWC4nxOyDnXIcIB8tZ3bN2O7tR8Z2zdieMl6UVyelX574F3226KIfne9j9q7YPsVPPf4DdxeLiA</recordid><startdate>202010</startdate><enddate>202010</enddate><creator>Pinto, Sabrina R.</creator><creator>Angulski da Luz, Caroline</creator><creator>Munhoz, Guilherme S.</creator><creator>Medeiros-Junior, Ronaldo A.</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope></search><sort><creationdate>202010</creationdate><title>Durability of phosphogypsum-based supersulfated cement mortar against external attack by sodium and magnesium sulfate</title><author>Pinto, Sabrina R. ; Angulski da Luz, Caroline ; Munhoz, Guilherme S. ; Medeiros-Junior, Ronaldo A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c343t-70f0040aaf4288b2af6391973bb63c8224f6b7572d597ae5f73795755dd5a4473</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Blast furnace slags</topic><topic>Brucite</topic><topic>Calcium sulfate</topic><topic>Clinker</topic><topic>Construction materials</topic><topic>Durability</topic><topic>Expansion</topic><topic>Magnesium hydroxide</topic><topic>Mortar</topic><topic>Mortars (material)</topic><topic>Phosphogypsum</topic><topic>Portland cements</topic><topic>Sodium sulfate</topic><topic>Sulfate attack</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Pinto, Sabrina R.</creatorcontrib><creatorcontrib>Angulski da Luz, Caroline</creatorcontrib><creatorcontrib>Munhoz, Guilherme S.</creatorcontrib><creatorcontrib>Medeiros-Junior, Ronaldo A.</creatorcontrib><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</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>Pinto, Sabrina R.</au><au>Angulski da Luz, Caroline</au><au>Munhoz, Guilherme S.</au><au>Medeiros-Junior, Ronaldo A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Durability of phosphogypsum-based supersulfated cement mortar against external attack by sodium and magnesium sulfate</atitle><jtitle>Cement and concrete research</jtitle><date>2020-10</date><risdate>2020</risdate><volume>136</volume><spage>106172</spage><pages>106172-</pages><artnum>106172</artnum><issn>0008-8846</issn><eissn>1873-3948</eissn><abstract>Supersulfated cements (SSCs) are composed primarily of blast furnace slag, calcium sulfate, and a small content of alkaline activator. SSC has been discussed in the literature because it has a low content of clinker and consequently low CO2 emissions. However, the current absence of durability studies is the main challenge for the large-scale implementation of SSC as a building material. The objective of this study was to investigate the behavior of phosphogypsum-based SSC mortar under sulfate attack. SSC mortars were submitted to MgSO4 and Na2SO4 solutions. Portland cements were also used as a comparison. SSC mortar showed good durability against sodium sulfate attack but presented an expansive behavior when exposed to magnesium sulfate. This behavior in the MgSO4 solution was attributed to the low portlandite reserve, which anticipated the attack of C-S-H. Besides, the non-formation of the brucite layer accelerated the entry of this type of sulfate.</abstract><cop>Elmsford</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.cemconres.2020.106172</doi></addata></record> |
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| source | Elsevier ScienceDirect Journals |
| subjects | Blast furnace slags Brucite Calcium sulfate Clinker Construction materials Durability Expansion Magnesium hydroxide Mortar Mortars (material) Phosphogypsum Portland cements Sodium sulfate Sulfate attack |
| title | Durability of phosphogypsum-based supersulfated cement mortar against external attack by sodium and magnesium sulfate |
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