Effect of Dosage of Alkaline Activator on the Properties of Alkali-Activated Slag Pastes
This study focused on the engineering properties of alkali-activated slag (AAS) pastes prepared by mixing an activator consisting of sodium silicate and sodium hydroxide at room temperature. The water-to-slag ratio of AAS paste was kept constant at 0.35 by mass. AAS pastes were prepared using the ac...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/8407380 |
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| author | Zhenzhen Jiao Ying Wang Wenzhong Zheng Wenxuan Huang |
| author_facet | Zhenzhen Jiao Ying Wang Wenzhong Zheng Wenxuan Huang |
| author_sort | Zhenzhen Jiao |
| collection | DOAJ |
| description | This study focused on the engineering properties of alkali-activated slag (AAS) pastes prepared by mixing an activator consisting of sodium silicate and sodium hydroxide at room temperature. The water-to-slag ratio of AAS paste was kept constant at 0.35 by mass. AAS pastes were prepared using the activator with five different silicate moduli of 1, 1.2, 1.4, 1.6, and 1.8 and three different Na2O contents of 6%, 8%, and 10%. The results showed that both the silicate moduli and Na2O contents had significant effects on the engineering properties of AAS pastes. All the AAS pastes exhibited properties such as fast setting, good workability, and high early compressive strength. The final setting time varied from 9 to 36 min, and the fluidity was in the range of 147–226 mm. The 1 d compressive strength of all the AAS pastes, which could be easily achieved, had values above 55 MPa, whereas the highest strength obtained was 102 MPa with the silicate modulus of 1 and Na2O content of 8% at room temperature. The drying shrinkage increased as the silicate modulus increased. Furthermore, the hydration products and microstructures of AAS pastes were explained according to the microanalysis methods. |
| format | Article |
| id | doaj-art-e4517d947feb440bbcb60ad0c07ccc5f |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-e4517d947feb440bbcb60ad0c07ccc5f2025-02-03T01:02:58ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/84073808407380Effect of Dosage of Alkaline Activator on the Properties of Alkali-Activated Slag PastesZhenzhen Jiao0Ying Wang1Wenzhong Zheng2Wenxuan Huang3Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, ChinaKey Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, ChinaKey Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, ChinaKey Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, ChinaThis study focused on the engineering properties of alkali-activated slag (AAS) pastes prepared by mixing an activator consisting of sodium silicate and sodium hydroxide at room temperature. The water-to-slag ratio of AAS paste was kept constant at 0.35 by mass. AAS pastes were prepared using the activator with five different silicate moduli of 1, 1.2, 1.4, 1.6, and 1.8 and three different Na2O contents of 6%, 8%, and 10%. The results showed that both the silicate moduli and Na2O contents had significant effects on the engineering properties of AAS pastes. All the AAS pastes exhibited properties such as fast setting, good workability, and high early compressive strength. The final setting time varied from 9 to 36 min, and the fluidity was in the range of 147–226 mm. The 1 d compressive strength of all the AAS pastes, which could be easily achieved, had values above 55 MPa, whereas the highest strength obtained was 102 MPa with the silicate modulus of 1 and Na2O content of 8% at room temperature. The drying shrinkage increased as the silicate modulus increased. Furthermore, the hydration products and microstructures of AAS pastes were explained according to the microanalysis methods.http://dx.doi.org/10.1155/2018/8407380 |
| spellingShingle | Zhenzhen Jiao Ying Wang Wenzhong Zheng Wenxuan Huang Effect of Dosage of Alkaline Activator on the Properties of Alkali-Activated Slag Pastes Advances in Materials Science and Engineering |
| title | Effect of Dosage of Alkaline Activator on the Properties of Alkali-Activated Slag Pastes |
| title_full | Effect of Dosage of Alkaline Activator on the Properties of Alkali-Activated Slag Pastes |
| title_fullStr | Effect of Dosage of Alkaline Activator on the Properties of Alkali-Activated Slag Pastes |
| title_full_unstemmed | Effect of Dosage of Alkaline Activator on the Properties of Alkali-Activated Slag Pastes |
| title_short | Effect of Dosage of Alkaline Activator on the Properties of Alkali-Activated Slag Pastes |
| title_sort | effect of dosage of alkaline activator on the properties of alkali activated slag pastes |
| url | http://dx.doi.org/10.1155/2018/8407380 |
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