Properties of High-Strength Porous Concrete


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Title: Properties of High-Strength Porous Concrete

Author(s): H. Fujiwara, R. Tomita, T. Okamoto, A. Dozono and A. Obatake

Publication: Special Publication

Volume: 179


Appears on pages(s): 173-188

Keywords: drying; freeze thaw durability; high-strength concrete; permeability; shrinkage; water

Date: 6/1/1998

new method of producing high-strength porous concrete has recently been developed in Japan. In this method, porous concrete is produced by coating the coarse aggregates with a high-strength mortar, then applying vibration to fuse them. Porous concrete produced bythis method has the following properties. It has a continuous void system with a volumeko-total-void ratio exceeding 85% and a compressive strength of 20 MPa or greater when water permeability is 2 crnkc. The porous concrete produced exhibited good durability in freezing and thawing tests (ASTM C666, Procedure B) and while the amount of drying shrinkage is about 60%, or smaller than that of conventional concrete, such shrinkage occuring very rapidly.