Effect of Mixing Method on Mechanical Properties and Pore Structure of Ultra High-Strength Concrete

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Title: Effect of Mixing Method on Mechanical Properties and Pore Structure of Ultra High-Strength Concrete

Author(s): M. Kakizaki, H. Edahiro, T. Tochigi, and T. Niki

Publication: Special Publication

Volume: 132

Issue:

Appears on pages(s): 997-1016

Keywords: compressive strength; flowability; high-strength concretes; porosity; silica fume; slump; water of hydration; workability; Materials Research

Date: 5/1/1992

Abstract:
High-strength and ultra high-strength cast-in-place concretes tend to contain excessive unit volumes of cement when compared with normal concrete, and since the improvement of workability relies largely on the efficiency of the air-entraining and high-range water-reducing admixtures, the properties of workability (or consistency) are different from normal concrete. With high-strength concrete, it was found that the method of mixing concrete influenced flowability, strength properties, and pore structure; details of this influence are given.