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Durability of conventional concretes containing black rice husk ash

Chatveera, B ; Lertwattanaruk, P

Journal of environmental management, January 2011, Vol.92(1), pp.59-66 [Tạp chí có phản biện]

E-ISSN: 1095-8630 ; PMID: 20863608 Version:1 ; DOI: 10.1016/j.jenvman.2010.08.007

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  • Nhan đề:
    Durability of conventional concretes containing black rice husk ash
  • Tác giả: Chatveera, B ; Lertwattanaruk, P
  • Chủ đề: Construction Materials ; Oryza
  • Là 1 phần của: Journal of environmental management, January 2011, Vol.92(1), pp.59-66
  • Mô tả: In this study, black rice husk ash (BRHA) from a rice mill in Thailand was ground and used as a partial cement replacement. The durability of conventional concretes with high water-binder ratios was investigated including drying shrinkage, autogenous shrinkage, depth of carbonation, and weight loss of concretes exposed to hydrochloric (HCl) and sulfuric (H(2)SO(4)) acid attacks. Two different replacement percentages of cement by BRHA, 20% and 40%, and three different water-binder ratios (0.6, 0.7 and 0.8) were used. The ratios of paste volume to void content of the compacted aggregate (γ) were 1.2, 1.4, and 1.6. As a result, when increasing the percentage replacement of BRHA, the drying shrinkage and depth of carbonation reaction of concretes increased. However, the BRHA provides a positive effect on the autogenous shrinkage and weight loss of concretes exposed to hydrochloric and sulfuric acid attacks. In addition, the resistance to acid attack was directly varied with the (SiO(2) + Al(2)O(3) + Fe(2)O(3))/CaO ratio. Results show that ground BRHA can be applied as a pozzolanic material and also improve the durability of concrete.
  • Ngôn ngữ: English
  • Số nhận dạng: E-ISSN: 1095-8630 ; PMID: 20863608 Version:1 ; DOI: 10.1016/j.jenvman.2010.08.007

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