| 摘要 |
PURPOSE: A porous hardening concrete is provided, which is improved in the sliding-resistance, the surface strength and the entire strength. CONSTITUTION: The concrete is prepared by mixing aggregate wherein the size of the maximum particle is 25-10 mm, and the content of medium particles in a specific range between 13-6 mm to 5-2 mm is less than 7% based on the entire aggregate in the size distribution between the size of the maximum particles and the size of the minimum particles less than 1.2 mm according to the size of the maximum particle; cement of 250-400 kg per 1 cubic meter of the aggregate; a mixing agent less than 2% based on the weight of the cement; a dye less than 10% based on the weight of the cement; and water of 80-150 kg per 1 cubic meter of the aggregate. The concrete has bending strength of 30-70 kg per square centimeter, compression strength of 150-400 kg per square centimeter, and a water permeation coefficient less than 10 cm/sec.
|
