Advanced SearchSearch Tips
A Study on the Hydration Reaction Model of Expansive Additive of Ettringite-Gypsum Type
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
A Study on the Hydration Reaction Model of Expansive Additive of Ettringite-Gypsum Type
Park Sun Gyu; Takahumi Noguchi; Kim Moo-Han;
  PDF(new window)
High-performance concrete (HPC), which is particularly sensitive to self-desiccation, is required to be durable even in severe environmental conditions, i.e. costal area, cold district, etc. However, in recent years, some attention was particularly given to cracking sensitivity of high performance concrete at early age. It has been argued and demonstrated experimentally that such concrete undergoes autogenous shrinkage due to self-desiccation at early age under restrained condition, nd, as a result, internal tensile stress may develop, leading to micro cracking and macro cracking. This shrinkage-introduced crack produces a major serviceability problem for concrete structures. One possible method to reduce cracking due to autogenous shrinkage is the addition of expansive additive. Tests conducted by many researches have shown the beneficial effects of addition of expansive additive for reducing the risk of autogenous shrinkage-introduced cracking. However, the research on hydration model of expansion additive has been hardly researched up to now. This paper presents a study of the hydration model of Ettringite-Gypsum type expansive additive. As a result of comparing forecast values with experiment value, proposed model is shown to expressible of hydration of expansive additive.
high-performance concrete;autogenous shrinkage;expansive additive;hydration reaction model;
 Cited by
에트링가이트-석회 복합계 팽창재를 사용한 시멘트 경화체의 팽창모델에 관한 연구,박선규;

대한건축학회논문집:구조계, 2009. vol.25. 7, pp.87-94
日本コンクリ-ト工學協會, コンクリ-トの自己收縮委員會報告書, 日本コンクリ-ト工學協會, 2002, pp.114-115

B. Persson, 'Self-Desiccation and Its Importance in Concrete Technology', Material and Structure. Vol.30, 1997. 7, pp.293-305 crossref(new window)

保利影宏他 외 3인, '膨張材を混和した各種高流動モルタルの自己收縮', コンクリ-ト工學年次發表論文集, Vol.20-2, 1998, pp.163-168

일본공업규격협회, JIS A 6202 [コンクリ一ト用膨張材], 1997.

山本賢司 외3인, '應張材の混和したセメントの膨張機構', コンクリ-ト工學論文集, Vol.14, No.3, 2003, pp.23-32

盛岡 実 외3인, '膨張材の水和反應と材料設計', セメント協會論文集, No.54, 2000, pp.111-116

M. Ish-Shalom, 'Properties of Type K Expansive Cement of Pure Components', Cement and Concrete Research Vol.4, 1974, pp.519-532 crossref(new window)

M. D. Cohen, 'Modeling of Expansive Cements', Cement and Concrete Research, Vol.13, 1983, pp.519-528 crossref(new window)

九山一平, マイクロメカニクスに基づくコンクリ-トの時間依存性, 東京大學學位論文. 2003

峰岸敬一 외, 熱量計におるセメントの水和機構, セラミックス, Vol.5, 1976, 11pp