A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Deterioration of Concrete Immersed in Sulfuric Acid for a Long Term
Deterioration of concrete caused by sulfuric acid attacks in sewage and waste water treatment plants has been investigated. To evaluate this type of deterioration, concrete specimens immersed in sulfuric acid solutions are usually examined, and the mass loss and erosion depth of the specimens can be used as physical indicators of the degree of the deterioration, while the sulfate ion penetration can be used as a chemical indicator. Although an actual deterioration is progressing with time, most of previous experimental studies were carried out for a comparatively short time. There is a possibility, therefore, that the deterioration in practice has not been estimated completely yet based on the above indicators. The present study aims at investigating the changes in pore structures and chemical compositions of concrete specimens to evaluate long-term deterioration experimentally. Concrete specimens in which a part of cement was replaced with blast furnace slag, fly ash and silica fume were immersed in sulfuric acid solutions at 0.09 mol/L and 0.006 mol/L for around 1500 days. Pore structures in concrete were investigated to understand the relationship between the erosion depth and the internal space available for expansion due to gypsum production. In addition, chemical compositions of mortar in concrete were analyzed to know the effects of mineral admixture on the resistance to the deterioration.
Deterioration of Concrete Immersed in Sulfuric Acid for a Long Term
Deterioration of concrete caused by sulfuric acid attacks in sewage and waste water treatment plants has been investigated. To evaluate this type of deterioration, concrete specimens immersed in sulfuric acid solutions are usually examined, and the mass loss and erosion depth of the specimens can be used as physical indicators of the degree of the deterioration, while the sulfate ion penetration can be used as a chemical indicator. Although an actual deterioration is progressing with time, most of previous experimental studies were carried out for a comparatively short time. There is a possibility, therefore, that the deterioration in practice has not been estimated completely yet based on the above indicators. The present study aims at investigating the changes in pore structures and chemical compositions of concrete specimens to evaluate long-term deterioration experimentally. Concrete specimens in which a part of cement was replaced with blast furnace slag, fly ash and silica fume were immersed in sulfuric acid solutions at 0.09 mol/L and 0.006 mol/L for around 1500 days. Pore structures in concrete were investigated to understand the relationship between the erosion depth and the internal space available for expansion due to gypsum production. In addition, chemical compositions of mortar in concrete were analyzed to know the effects of mineral admixture on the resistance to the deterioration.
Deterioration of Concrete Immersed in Sulfuric Acid for a Long Term
Key Engineering Materials ; 711 ; 659-664
2016-09-23
6 pages
Article (Journal)
Electronic Resource
English
Deterioration of Concrete Immersed in Sulfuric Acid for a Long Term
| British Library Conference Proceedings | 2016
Concrete Deterioration Caused by Sulfuric Acid Attack
| British Library Conference Proceedings | 2005
Deterioration of Concrete Due to Sulfuric Acid Attack
| British Library Conference Proceedings | 2001
Concrete deterioration by bacteriogenically induced sulfuric acid attack
| British Library Conference Proceedings | 2014
Experiment Study on Corrosion Rate of Concrete Specimens Immersed in Sulfuric Acid
| Tema Archive | 2012