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Title:
HIGH PERFORMANCE CONCRETE
Document Type and Number:
Japanese Patent JP2003176164
Kind Code:
A
Abstract:

To provide high performance concrete which has satisfactory operability, has compressive strength of ≥70 N/mm2, and has low-shrinkage.

The high performance concrete consists of a hardened body of a blend containing cement containing ≥30 wt.% 2CaO-SiO2, and whose decrease in weight at 20 to 500°C by thermogravimetric measurement is 0.7 to 2.5 wt.%, and an admixture consisting of a mixed pulverized material of a clinker composition in which the main mineral consists of 3CaO-SiO2-2CaO- SiO2-CaO-interstitial material, 3CaO-SiO2-CaO-interstitial material, 2CaO-SiO2- CaO-interstitial material, or CaO-interstitial material, and which contains 50 to 92 wt.% CaO crystals and gypsum, or consisting of a mixed pulverized material of the above clinker composition, quicklime and gypsum, a water-reducing agent, a fine aggregate, a coarse aggregate, and water, and in which the total content of the cement and the admixture is 500 to 700 kg/m3, and the ratio of the water/(the cement + the admixture) is 25 to 35 wt.%, and the slump flow value of the blend is 50 to 80 cm. The amount of the admixture to be blended is preferably controlled in 1 to 60 kg/m3.


Inventors:
HYODO HIKOJI
TANIMURA MITSURU
Application Number:
JP2001372811A
Publication Date:
June 24, 2003
Filing Date:
December 06, 2001
Export Citation:
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Assignee:
TAIHEIYO CEMENT CORP
International Classes:
C04B7/00; C04B28/02; C04B28/14; C04B111/34; (IPC1-7): C04B28/02; C04B28/14