Influence of Air Temperature on the Performance of Different Water-Reducing Admixtures with Respect to the Properties of Fresh and Hardened Mortar
The performance of water-reducing admixtures used in concrete is affected by the weather conditions to which the concrete mixture is exposed. The most used WRAs are lignosulfonate, naphthalene, and polycarboxylate. However, they react differently to weather conditions, especially to air temperature....
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2010-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2010/136768 |
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| _version_ | 1832556160447676416 |
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| author | Wilson Ricardo Leal Silva Luiz Roberto Prudêncio Alexandre Lima Oliveira Gabriela Damo Eduardo Tochetto |
| author_facet | Wilson Ricardo Leal Silva Luiz Roberto Prudêncio Alexandre Lima Oliveira Gabriela Damo Eduardo Tochetto |
| author_sort | Wilson Ricardo Leal Silva |
| collection | DOAJ |
| description | The performance of water-reducing admixtures used in concrete is affected by the weather conditions to which the concrete mixture is exposed. The most used WRAs are lignosulfonate, naphthalene, and polycarboxylate. However, they react differently to weather conditions, especially to air temperature. Therefore, it can be useful to evaluate how temperature affects admixture performance. In this study, the performance of three admixtures (naphthalene, lignosulfonate, and polycarboxylate) was evaluated at 15, 25, and 35°C by means of the flow table test, mixture air content, and compressive strength. Moreover, mixture temperature was monitored and time-temperature curves were plotted in order to assess whether the admixtures affected cement hydration reactions at different temperatures. The final results indicate that an increase in temperature leads to an increase in saturation dosage; lignosulfonate had the most pronounced retarding effect, followed by polycarboxylate, and finally, naphthalene, and considering the weather conditions in the area where the study was carried, the final finding would be that the naphthalene-based admixture had the best performance. |
| format | Article |
| id | doaj-art-c245d011c4ef4ecf83fcf08e9eff6ac4 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2010-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-c245d011c4ef4ecf83fcf08e9eff6ac42025-02-03T05:46:11ZengWileyAdvances in Civil Engineering1687-80861687-80942010-01-01201010.1155/2010/136768136768Influence of Air Temperature on the Performance of Different Water-Reducing Admixtures with Respect to the Properties of Fresh and Hardened MortarWilson Ricardo Leal Silva0Luiz Roberto Prudêncio1Alexandre Lima Oliveira2Gabriela Damo3Eduardo Tochetto4Universidade Federal de Santa Catarina, Campus Universitário, Eng.Civil, Bl. B/s.114, 88040970 Florianópolis, BrazilUniversidade Federal de Santa Catarina, Campus Universitário, Eng.Civil, Bl. B/s.114, 88040970 Florianópolis, BrazilInstituto Federal de Santa Catarina, Avenida Mauro Ramos 950, 88020-300 Florianópolis, BrazilUniversidade Federal de Santa Catarina, Campus Universitário, Eng.Civil, Bl. B/s.114, 88040970 Florianópolis, BrazilUniversidade Federal de Santa Catarina, Campus Universitário, Eng.Civil, Bl. B/s.114, 88040970 Florianópolis, BrazilThe performance of water-reducing admixtures used in concrete is affected by the weather conditions to which the concrete mixture is exposed. The most used WRAs are lignosulfonate, naphthalene, and polycarboxylate. However, they react differently to weather conditions, especially to air temperature. Therefore, it can be useful to evaluate how temperature affects admixture performance. In this study, the performance of three admixtures (naphthalene, lignosulfonate, and polycarboxylate) was evaluated at 15, 25, and 35°C by means of the flow table test, mixture air content, and compressive strength. Moreover, mixture temperature was monitored and time-temperature curves were plotted in order to assess whether the admixtures affected cement hydration reactions at different temperatures. The final results indicate that an increase in temperature leads to an increase in saturation dosage; lignosulfonate had the most pronounced retarding effect, followed by polycarboxylate, and finally, naphthalene, and considering the weather conditions in the area where the study was carried, the final finding would be that the naphthalene-based admixture had the best performance.http://dx.doi.org/10.1155/2010/136768 |
| spellingShingle | Wilson Ricardo Leal Silva Luiz Roberto Prudêncio Alexandre Lima Oliveira Gabriela Damo Eduardo Tochetto Influence of Air Temperature on the Performance of Different Water-Reducing Admixtures with Respect to the Properties of Fresh and Hardened Mortar Advances in Civil Engineering |
| title | Influence of Air Temperature on the Performance of Different Water-Reducing Admixtures with Respect to the Properties of Fresh and Hardened Mortar |
| title_full | Influence of Air Temperature on the Performance of Different Water-Reducing Admixtures with Respect to the Properties of Fresh and Hardened Mortar |
| title_fullStr | Influence of Air Temperature on the Performance of Different Water-Reducing Admixtures with Respect to the Properties of Fresh and Hardened Mortar |
| title_full_unstemmed | Influence of Air Temperature on the Performance of Different Water-Reducing Admixtures with Respect to the Properties of Fresh and Hardened Mortar |
| title_short | Influence of Air Temperature on the Performance of Different Water-Reducing Admixtures with Respect to the Properties of Fresh and Hardened Mortar |
| title_sort | influence of air temperature on the performance of different water reducing admixtures with respect to the properties of fresh and hardened mortar |
| url | http://dx.doi.org/10.1155/2010/136768 |
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