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Title |
Durability of Ultrarapid-Hardening Polymer-Modified Concretes Using Metakaolin
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Authors |
유태호(Tae-Ho Yoo) ; 장병하(Byung-Ha Chang) ; 홍현표(Hyun-Pyo Hong) |
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DOI |
https://doi.org/10.11112/jksmi.2018.22.5.031 |
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Keywords |
초속경 폴리머 시멘트 콘크리트 ; 메타카올린 첨가량 ; 폴리머-결합재비 ; 강도 ; 내구성 ultrarapid-hardening polymer-modified concrete ; matakaolin content ; polymer-binder ratio ; strengths ; durability |
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Abstract |
The effects of polymer-binder ratio and metakaolin content on the properties of ultrarapid-hardening polymer-modified concretes using metakaolin are examined. As a result, regardless of the metakaolin content, the flexural, compressive and adhesion in tension strength of the ultrarapid-hardening polymer-modified concretes tend to increase with increasing polymer-binder ratio. Regardless of the polymer-binder ratio, the strengths of the ultrarapid-hardening polymer-modified concretes increase with increasing metakaolin content, and reaches a maximum at metakaolin content of 5%. The water absorption, carbonation depth and resistance of chloride ion penetration of the ultrarapid-hardening polymer-modified concretes decrease with increasing polymer-binder ratio. The resistance of freezing and thawing improvement is attributed to the improved bond between cement hydrates and aggregates because of the incorporation of polymer dispersion.
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