Comparison of different methods for activation of ordinary Portland cement-slag mortars
This paper compares three methods for activation of OPC-slag mortars (OSM): (1) prolonged grinding of binders (mechanical method), (2) elevated temperature curing of mortars (thermal method), and (3) use of chemical activators such as NaOH, KOH, and Na2SiO3, 9.35H2O (chemical method). The proper rea...
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| Format: | Article |
| Language: | English |
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Elsevier
2011
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| Online Access: | http://eprints.um.edu.my/9113/1/Comparison_of_different_methods_for_activation_of_ordinary_Portland.pdf |
| _version_ | 1796945863838269440 |
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| author | Sajedi, F. Razak, Hashim Abdul |
| author_facet | Sajedi, F. Razak, Hashim Abdul |
| author_sort | Sajedi, F. |
| collection | UM |
| description | This paper compares three methods for activation of OPC-slag mortars (OSM): (1) prolonged grinding of binders (mechanical method), (2) elevated temperature curing of mortars (thermal method), and (3) use of chemical activators such as NaOH, KOH, and Na2SiO3, 9.35H2O (chemical method). The proper reactivity of OSM was evaluated using a mixture of 50 OPC and 50 slag. Early and ultimate strengths were compared. All three activation methods accelerated both the slag reaction and strength development rates. However, the chemical method did not show a significant effect on the ultimate strength, while thermal activation increased the early strength by 3 days. Mechanical activation increased the early strengths of the mortar significantly, but about 6 strength loss occurred in the ultimate strength. Although, the application of mechanical and thermal activation methods needs extra equipment and energy, due to more significant of strength improvement; based on current test results, it can be said that mechanical activation is the most efficient and feasible method for the activation of OSMs. © 2010 Elsevier Ltd. All rights reserved. |
| first_indexed | 2024-03-06T05:22:59Z |
| format | Article |
| id | um.eprints-9113 |
| institution | Universiti Malaya |
| language | English |
| last_indexed | 2024-03-06T05:22:59Z |
| publishDate | 2011 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | um.eprints-91132019-08-07T08:51:19Z http://eprints.um.edu.my/9113/ Comparison of different methods for activation of ordinary Portland cement-slag mortars Sajedi, F. Razak, Hashim Abdul TA Engineering (General). Civil engineering (General) This paper compares three methods for activation of OPC-slag mortars (OSM): (1) prolonged grinding of binders (mechanical method), (2) elevated temperature curing of mortars (thermal method), and (3) use of chemical activators such as NaOH, KOH, and Na2SiO3, 9.35H2O (chemical method). The proper reactivity of OSM was evaluated using a mixture of 50 OPC and 50 slag. Early and ultimate strengths were compared. All three activation methods accelerated both the slag reaction and strength development rates. However, the chemical method did not show a significant effect on the ultimate strength, while thermal activation increased the early strength by 3 days. Mechanical activation increased the early strengths of the mortar significantly, but about 6 strength loss occurred in the ultimate strength. Although, the application of mechanical and thermal activation methods needs extra equipment and energy, due to more significant of strength improvement; based on current test results, it can be said that mechanical activation is the most efficient and feasible method for the activation of OSMs. © 2010 Elsevier Ltd. All rights reserved. Elsevier 2011 Article PeerReviewed application/pdf en http://eprints.um.edu.my/9113/1/Comparison_of_different_methods_for_activation_of_ordinary_Portland.pdf Sajedi, F. and Razak, Hashim Abdul (2011) Comparison of different methods for activation of ordinary Portland cement-slag mortars. Construction and Building Materials, 25 (1). pp. 30-38. ISSN 0950-0618, DOI https://doi.org/10.1016/j.conbuildmat.2010.06.060 <https://doi.org/10.1016/j.conbuildmat.2010.06.060>. https://doi.org/10.1016/j.conbuildmat.2010.06.060 doi:10.1016/j.conbuildmat.2010.06.060 |
| spellingShingle | TA Engineering (General). Civil engineering (General) Sajedi, F. Razak, Hashim Abdul Comparison of different methods for activation of ordinary Portland cement-slag mortars |
| title | Comparison of different methods for activation of ordinary Portland cement-slag mortars |
| title_full | Comparison of different methods for activation of ordinary Portland cement-slag mortars |
| title_fullStr | Comparison of different methods for activation of ordinary Portland cement-slag mortars |
| title_full_unstemmed | Comparison of different methods for activation of ordinary Portland cement-slag mortars |
| title_short | Comparison of different methods for activation of ordinary Portland cement-slag mortars |
| title_sort | comparison of different methods for activation of ordinary portland cement slag mortars |
| topic | TA Engineering (General). Civil engineering (General) |
| url | http://eprints.um.edu.my/9113/1/Comparison_of_different_methods_for_activation_of_ordinary_Portland.pdf |
| work_keys_str_mv | AT sajedif comparisonofdifferentmethodsforactivationofordinaryportlandcementslagmortars AT razakhashimabdul comparisonofdifferentmethodsforactivationofordinaryportlandcementslagmortars |