SULFURIC ACID-RESISTANT HYDRAULIC COMPOSITION AND SULFURIC ACID-RESISTANT HARDENED MATTER

摘要

PROBLEM TO BE SOLVED: To provide a sulfuric acid-resistant hydraulic composition and a sulfuric acid-resistant hardened matter having an excellent sulfuric acid-resistance in a sulfuric acid corrosion environment or the like resulted from a bacteria (sulfur oxidizing bacteria) and also having a slow neutralization speed. SOLUTION: The sulfuric acid-resistant hydraulic composition is composed of Portland cement, limestone powder, a naphthalenesulfonic acid formalin condensate salt and a thickener. The Portland cement contains 3CaO-SiO2amount by 60 mass% or more. The specific surface area of the limestone powder is 2,000 cm2/g or more. The mass ratio of the Portland cement and the limestone powder is (30:70) to (100:0). The naphthalenesulfonic acid formalin condensate salt is 1-10 pts. mass to 100 pts. mass inorganic powder composition composed of the Portland cement and the limestone powder. A sulfuric acid-resistant concrete is formed by mixing an aggregate and water to the sulfuric acid-resistant hydraulic composition and hardening the mixture. COPYRIGHT: (C)2006,JPO&NCIPI