Strength and microstructure analysis of concrete containing rice husk ash under seawater attack by wetting and drying cycles
Concrete containing rice husk ash (RHA), subjected to seawater under wetting and drying cycles, was studied through an investigation of the compressive strength and microstructure of various types of blended cement paste. Five levels of cement replacement (0%, 10%, 20%, 30% and 40% by weight) were s...
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| Format: | Article |
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Ice Publishing
2014
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| _version_ | 1796861314032730112 |
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| author | Putra Jaya, Ramadhansyah Abu Bakar, Badorul Hisham Megat Johari, Megat Azmi Wan Ibrahim, Mohd. Haziman Hainin, Mohd. Rosli Jayanti, Dewi Sri |
| author_facet | Putra Jaya, Ramadhansyah Abu Bakar, Badorul Hisham Megat Johari, Megat Azmi Wan Ibrahim, Mohd. Haziman Hainin, Mohd. Rosli Jayanti, Dewi Sri |
| author_sort | Putra Jaya, Ramadhansyah |
| collection | ePrints |
| description | Concrete containing rice husk ash (RHA), subjected to seawater under wetting and drying cycles, was studied through an investigation of the compressive strength and microstructure of various types of blended cement paste. Five levels of cement replacement (0%, 10%, 20%, 30% and 40% by weight) were studied. The total cementitious content used was 420 kg/m(3): A water/binder ratio of 0.49 was used to produce concrete with a target strength of 40 MPa at age 28 days. The performance of blended cement concrete was evaluated based on compressive strength and chloride ion permeability. Microstructural changes in the specimens were determined by differential thermal analysis, X-ray diffraction and scanning electron microscopy. The addition of RHA was found to decrease calcium hydroxide formation by hydration and, consequently, gypsum and ettringite were reduced during seawater attack. RHA at 40% cement replacement improved resistance to seawater attack and effectively decreased ettringite and gypsum formations. |
| first_indexed | 2024-03-05T19:54:27Z |
| format | Article |
| id | utm.eprints-62674 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T19:54:27Z |
| publishDate | 2014 |
| publisher | Ice Publishing |
| record_format | dspace |
| spelling | utm.eprints-626742017-06-01T03:11:13Z http://eprints.utm.my/62674/ Strength and microstructure analysis of concrete containing rice husk ash under seawater attack by wetting and drying cycles Putra Jaya, Ramadhansyah Abu Bakar, Badorul Hisham Megat Johari, Megat Azmi Wan Ibrahim, Mohd. Haziman Hainin, Mohd. Rosli Jayanti, Dewi Sri TA Engineering (General). Civil engineering (General) Concrete containing rice husk ash (RHA), subjected to seawater under wetting and drying cycles, was studied through an investigation of the compressive strength and microstructure of various types of blended cement paste. Five levels of cement replacement (0%, 10%, 20%, 30% and 40% by weight) were studied. The total cementitious content used was 420 kg/m(3): A water/binder ratio of 0.49 was used to produce concrete with a target strength of 40 MPa at age 28 days. The performance of blended cement concrete was evaluated based on compressive strength and chloride ion permeability. Microstructural changes in the specimens were determined by differential thermal analysis, X-ray diffraction and scanning electron microscopy. The addition of RHA was found to decrease calcium hydroxide formation by hydration and, consequently, gypsum and ettringite were reduced during seawater attack. RHA at 40% cement replacement improved resistance to seawater attack and effectively decreased ettringite and gypsum formations. Ice Publishing 2014 Article PeerReviewed Putra Jaya, Ramadhansyah and Abu Bakar, Badorul Hisham and Megat Johari, Megat Azmi and Wan Ibrahim, Mohd. Haziman and Hainin, Mohd. Rosli and Jayanti, Dewi Sri (2014) Strength and microstructure analysis of concrete containing rice husk ash under seawater attack by wetting and drying cycles. Advances in Cement Research, 26 (3). pp. 145-154. ISSN 0951-7197 http://dx.doi.org/10.1680/adcr.13.00010 DOI:10.1680/adcr.13.00010 |
| spellingShingle | TA Engineering (General). Civil engineering (General) Putra Jaya, Ramadhansyah Abu Bakar, Badorul Hisham Megat Johari, Megat Azmi Wan Ibrahim, Mohd. Haziman Hainin, Mohd. Rosli Jayanti, Dewi Sri Strength and microstructure analysis of concrete containing rice husk ash under seawater attack by wetting and drying cycles |
| title | Strength and microstructure analysis of concrete containing rice husk ash under seawater attack by wetting and drying cycles |
| title_full | Strength and microstructure analysis of concrete containing rice husk ash under seawater attack by wetting and drying cycles |
| title_fullStr | Strength and microstructure analysis of concrete containing rice husk ash under seawater attack by wetting and drying cycles |
| title_full_unstemmed | Strength and microstructure analysis of concrete containing rice husk ash under seawater attack by wetting and drying cycles |
| title_short | Strength and microstructure analysis of concrete containing rice husk ash under seawater attack by wetting and drying cycles |
| title_sort | strength and microstructure analysis of concrete containing rice husk ash under seawater attack by wetting and drying cycles |
| topic | TA Engineering (General). Civil engineering (General) |
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