HIGH STRENGTH AND LOW WATER ABSORPTION SCORIA CONCRETE

摘要

A method for manufacturing high strength and low water absorption scoria concrete is provided to apply a pyroclastic material distributed in a stony mountain to production of high value-added products and produce scoria concrete having high strength, low water absorption, and many functions. A method for manufacturing high strength and low water absorption scoria concrete includes the steps of: collecting a pyroclastic material in a stony mountain; breaking the pyroclastic material to control a particle size thereof, and then manufacturing artificial scoria having a water absorption rate of 2-7% and a wear rate of 20-45%; mixing the artificial scoria, cement, water, and an admixture to prepare scoria concrete, and casting the concrete into a mold; and curing the scoria concrete for 7 days or more, and cutting the cured scoria concrete to produce building materials. The scoria concrete exhibits a compressive strength of 30-50 MPa and a water absorption rate of 3-9%.