Effect of Silica Fume and Fly Ash on Compressive Strength and Weight Loss of High Strength Concrete Material in Sulfuric and Acetic Acid Attack

Abstract

This issue mainly studied the compressive strength and weight loss of high strength concrete in sulfuric and acetic acid attack. Different substitution amounts of silica fume and fly ash single single incorporated and co-incorporated in cement to form high strength concrete. Then weight losses, XRD and SEM were carried out to investigate compressive strength and acid resistance corrosion mechanism after leaching in 5% H2SO4 and 5% CH3COOH solution for 28 days. The results show S10F12 improves the compressive strength by 29.6%, 40.5% and 28.4% in 7, 28 and 56 days curing respectively compared to OPC. The improvement of resistant to 5% H2SO4 and 5% CH3COOH of S10F12 is 38.3% and 112.5% for 28 days immersion respectively, and S10f12 still has compressive strength of 58.8 MP and 45.9 MPa under 5% H2SO4 and 5% CH3COOH attack while OPC only has 38.8MPa and 21.6 MPa after 28 days immersion.