Patent ID: 7677786
Filing Date: 2010-03-16
Classification: B28C,C04B,Y02W

Abstract:
1. A process for producing concrete, comprising: in producing concrete, previously providing at least one premix composition for a concrete mix, which has been measured and prepared by automatic control means according to properties required of the concrete; and kneading and mixing the previously provided premix composition to form a slurry composition of the premix composition for a concrete mix with cement, coarse aggregate, fine aggregates, water, and a chemical admixture, wherein the premix composition comprises the following components (A) to (D): component (A): 100 parts by weight of at least one admixture (1) selected from the group consisting of fly ash defined as JIS type II, ground granulated blast furnace slag defined as JIS 4000, and impalpable powder of lime stone; component (B): 5 to 2000 parts by weight of at least one admixture (2) selected from silica fume, fly ash defined as JIS type I, ground granulated blast furnace slag defined as JIS 8000, and waterproof materials; component (C): 1 to 20 parts by weight of at least one chemical admixture selected from the group consisting of high performance AE water reducing agents, and stabilizers; and component (D): 40 to 160 parts by weight of water.