Optimizing fly ash and rice husk ash as cement replacements on the mechani-cal characteristics of pervious concrete
Replacing cement with fillers while being environment-friendly contributes to the performance enhancement of conventional concrete. In the investiga-tion, nine batches of concrete mix were prepared with different amounts of cement, fly ash (FA) and rice husk ash (RHA). This experiment investigated t...
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| Format: | Article |
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Sustainable Development Press Limited
2025-03-01
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| Series: | Sustainable Structures |
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| author | Navaratnarajah Sathiparan Daniel Niruban Subramaniam |
| author_facet | Navaratnarajah Sathiparan Daniel Niruban Subramaniam |
| author_sort | Navaratnarajah Sathiparan |
| collection | DOAJ |
| description | Replacing cement with fillers while being environment-friendly contributes to the performance enhancement of conventional concrete. In the investiga-tion, nine batches of concrete mix were prepared with different amounts of cement, fly ash (FA) and rice husk ash (RHA). This experiment investigated the consequence of substituting cement with FA at various water-to-binder (W/B) proportions. The FA content was ranged from 5% to 20% of cement by weight, and the W/B ratio was adjusted to 0.3, 0.35, 0.4, and 0.45. Further-more, for 10% cement replacement, FA and RHA combination of 10:0, 7.5:2.5, 5:5, 2.5:7.5 and 0:10 by weight were used. When FA alone was used as cement replacement, the optimal mix achieved a 28-day compressive strength of 31.33 MPa at a W/B ratio 0.40 with 10% FA. Moreover, incorpo-rating FA and RHA resulted in a cost reduction of approximately 15% per cubic meter of concrete and a decrease in CO₂ emissions by 20% compared to conventional concrete production. The findings demonstrate that FA and RHA can be effectively combined to manufacture pervious concrete that enhances performance, reduces costs, and minimizes environmental pollu-tants. |
| format | Article |
| id | doaj-art-f41b10fc4ce84fdc89cf1de258516ae2 |
| institution | Kabale University |
| issn | 2789-3111 2789-312X |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Sustainable Development Press Limited |
| record_format | Article |
| series | Sustainable Structures |
| spelling | doaj-art-f41b10fc4ce84fdc89cf1de258516ae22025-02-09T04:48:21ZengSustainable Development Press LimitedSustainable Structures2789-31112789-312X2025-03-015110.54113/j.sust.2025.000065Optimizing fly ash and rice husk ash as cement replacements on the mechani-cal characteristics of pervious concreteNavaratnarajah Sathiparan0Daniel Niruban Subramaniam1Department of Civil Engineering, Faculty of Engineering, University of Jaffna, Jaffna 40000, SriLanka.Department of Civil Engineering, Faculty of Engineering, University of Jaffna, Jaffna 40000, SriLanka.Replacing cement with fillers while being environment-friendly contributes to the performance enhancement of conventional concrete. In the investiga-tion, nine batches of concrete mix were prepared with different amounts of cement, fly ash (FA) and rice husk ash (RHA). This experiment investigated the consequence of substituting cement with FA at various water-to-binder (W/B) proportions. The FA content was ranged from 5% to 20% of cement by weight, and the W/B ratio was adjusted to 0.3, 0.35, 0.4, and 0.45. Further-more, for 10% cement replacement, FA and RHA combination of 10:0, 7.5:2.5, 5:5, 2.5:7.5 and 0:10 by weight were used. When FA alone was used as cement replacement, the optimal mix achieved a 28-day compressive strength of 31.33 MPa at a W/B ratio 0.40 with 10% FA. Moreover, incorpo-rating FA and RHA resulted in a cost reduction of approximately 15% per cubic meter of concrete and a decrease in CO₂ emissions by 20% compared to conventional concrete production. The findings demonstrate that FA and RHA can be effectively combined to manufacture pervious concrete that enhances performance, reduces costs, and minimizes environmental pollu-tants.pervious concretefly ashrice husk ashcompressive strength |
| spellingShingle | Navaratnarajah Sathiparan Daniel Niruban Subramaniam Optimizing fly ash and rice husk ash as cement replacements on the mechani-cal characteristics of pervious concrete Sustainable Structures pervious concrete fly ash rice husk ash compressive strength |
| title | Optimizing fly ash and rice husk ash as cement replacements on the mechani-cal characteristics of pervious concrete |
| title_full | Optimizing fly ash and rice husk ash as cement replacements on the mechani-cal characteristics of pervious concrete |
| title_fullStr | Optimizing fly ash and rice husk ash as cement replacements on the mechani-cal characteristics of pervious concrete |
| title_full_unstemmed | Optimizing fly ash and rice husk ash as cement replacements on the mechani-cal characteristics of pervious concrete |
| title_short | Optimizing fly ash and rice husk ash as cement replacements on the mechani-cal characteristics of pervious concrete |
| title_sort | optimizing fly ash and rice husk ash as cement replacements on the mechani cal characteristics of pervious concrete |
| topic | pervious concrete fly ash rice husk ash compressive strength |
| work_keys_str_mv | AT navaratnarajahsathiparan optimizingflyashandricehuskashascementreplacementsonthemechanicalcharacteristicsofperviousconcrete AT danielnirubansubramaniam optimizingflyashandricehuskashascementreplacementsonthemechanicalcharacteristicsofperviousconcrete |