STUDY ON DURABILITY OF CLINKER-FREE CONCRETE WITH A BINDER COMBINING DEHYDRATED SLUDGE POWDER WITH OTHER INDUSTRIAL BY-PRODUCTS ADMIXTURE
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- OHKAWA Ken
- 三和石産(株) テスティング事業部
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- AOKI Shinichi
- 三和石産(株) 研究開発部
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- KANDA Tetsushi
- 鹿島建設(株) 技術研究所 建築生産グループ
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- MOMOSE Haruki
- 鹿島建設(株) 技術研究所 建築生産グループ
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- KASAI Tetsurou
- 東海大学 工学部 土木工学科
Bibliographic Information
- Other Title
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- 乾燥スラッジ微粉末と産業副産物混和材を併用した養生方法の異なるクリンカーフリーコンクリートの耐久性に関する研究
Abstract
Increasing demand on the reduction of CO2 emission in the construction industry has required development of new concrete without ordinary Portland cement. Such concrete, e.g., geopolymer, has draw-back in terms of carbonation resistance when applied to reinforced concrete structures. To account for this improvement, the authors focused on clinker-free concrete involving dehydrated sludge powder (DSP) produced from waste ready-mixed concrete, which is returned from construction site to concrete manufacturer without used for construction work.<br> In this study, durability of proposed clinker-free concrete with a binder combining DSP with other industrial by-products was studied in terms of carbonation resistance and cracking resistance. As a result, it was confirmed that, at an appropriate water-binder ranges and using DSP with less than about 8,000 cm2/g of specific surface area by 60-80% of binder, the proposed concrete showed equivalent or higher carbonation resistance than that of normal concrete, and when applied to PCa members, showed sufficient cracking resistance under restraint rebars, while free shrinkage strain was 100 to 200 μ larger than that of normal concrete.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. E2 (Materials and Concrete Structures)
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Journal of Japan Society of Civil Engineers, Ser. E2 (Materials and Concrete Structures) 73 (1), 107-117, 2017
Japan Society of Civil Engineers
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Details 詳細情報について
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- CRID
- 1390001205355608576
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- NII Article ID
- 130005464645
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- ISSN
- 21856567
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed