concrete deterioration caused by sulfuric acid attack

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Concrete Deterioration Caused by Sulfuric Acid Attack

concrete deterioration caused by sulfuric acid attack will proceed at a greater rate than that predicted from the square root relationship. Hence in this study concrete deterioration caused by sulfuric acid attack was investigated considering the effects of the flow of acid solution over the surface of concrete with the intent of proposing a prediction method for the deterioration of concrete ...

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Concrete Deterioration Caused by Sulfuric Acid Attack ...

Recently, biological deterioration of concrete in sewage and wastewater treatment plants has been reported. This deterioration is caused by sulfuric acid attack and is dependent on the ...

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(PDF) Concrete deterioration by bacteriogenically induced ...

Concrete deterioration by bacteriogenically induced sulfuric acid attack. Albrecht Leis. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. READ PAPER . Concrete deterioration by bacteriogenically induced sulfuric acid attack. Download. Concrete deterioration by bacteriogenically induced sulfuric acid attack. Albrecht Leis ...

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Sulphuric Acid Attack on Concrete Tanks

Sulphur attack in pump chamber causes the concrete to corrode and the concrete changes to soft gypsum. This type of concrete deterioration is also known as “crown rot” S2-+ H 2O + CO 2 H 2S H 2SO 4 (Equation 1) Organic matter + SO 4 2-S2-+ 2H+ H 2S + 2 O 2 The Science Corner — Sulphuric Acid Attack on Concrete Tanks By: Iggy Ip, B.A.Sc., E.I.T. Waterloo Biofilter Systems Inc. 9 Sulphuric ...

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Biogenic Sulfuric Acid Attack and Case Studies

Biogenic Sulfuric Acid Attack and Case Studies by Hugh (Xiaoqiang) Hou, Kimberly A. Steiner, John Fraczek, and James A. Mahaney B iogenic sulfuric acid attack (BSA) is probably the most common and most severe biodegradation mechanism affecting concrete. BSA causes widespread global infrastructure deterioration, and it is reported to be responsible for damages totaling about 10 billion

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(PDF) Concrete deterioration by bacteriogenically induced ...

Concrete deterioration by bacteriogenically induced sulfuric acid attack. Albrecht Leis. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. READ PAPER . Concrete deterioration by bacteriogenically induced sulfuric acid attack. Download. Concrete deterioration by bacteriogenically induced sulfuric acid attack. Albrecht Leis ...

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Degradation modelling of concrete submitted to sulfuric ...

01/11/2013  In order to assess the sulfuric acid attack process in the deterioration of sewer pipe, a reactive transport model is built. This model could be used to simulate the degradation depth and compounds of cementitious materials in contact with sulfuric acid solution. The equilibrium of different solid phases and aqueous species in pore solution is considered. The transport of aqueous species is ...

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Acid Attack on Concrete - Effects Results of Acid Attack ...

14/02/2017  Sulphuric acid attack causes extensive formation of gypsum in the regions close to the surfaces, and tends to cause disintegration and mechanical stresses which ultimately lead to spalling and exposure of the fresh interior surface. Normally, the chemical changes of the cement matrix are restricted to the regions close to the surfaces because of less penetration of the Sulfuric acid in concrete.

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Degradation of concrete structures from influence of ...

06/01/2020  Sulfuric acid is the most severe type of acid which causes both dissolution of the calcium hydroxide as well as sulfate attached (due to the presence of sulfate ions). Any solution to prevent penetration of aggressive materials into the concrete can reduce the likelihood of acid attack. In addition, incorporation of SCMs enhances the quality of concrete and consequently prevent the acid attack.

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Three-Dimensional Fractal Characterization of Concrete ...

12/07/2020  Concrete deterioration caused by sulfuric acid attack is more severe than deterioration caused by sulfate attack since a sulfate attack only consists of the latter action of a sulfuric acid attack. The main reaction product from a sulfuric acid attack is generally gypsum because the ettringite is unstable under acid circumstances . Depending on the pH value of acid solution, hydrated oxide of ...

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A study on the diagnosis method for concrete damaged by ...

Conference: Third International Conference on Concrete Under Severe Conditions of Environment and Loading At: Vancouver Project: concrete deterioration caused by acid attack

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(PDF) Study of Effect of Chemicals (Acid) Attack on ...

REFERENCES [1] K. Kawai et al, "Concrete Deterioration Caused by Sulfuric Acid Attack":10DBMC International Conférence On Durability of Building Materials and Components [April 2005]. [2] Emmanuel K et al "Response of Concrete to Sulfuric Graph –7: % Reduction in Weight Vs Exposure Time Acid Attack ": ACI Material Journal. Title no. 85-M46. when cubes are sprinkled with 10% Acid [3 ...

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Response of Concrete to Sulfuric Acid Attack

The response of four different concrete mixes to sulfuric acid attack was evaluated in an accelerated laboratory test program. Small test specimens cut from sta. Search. Subscribe to Email Membership. Membership. In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have itthey are engaged, informed, and stay up to date by taking ...

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Types and Causes of Concrete Deterioration

leading cause of deterioration in concrete. When steel corrodes, the resulting rust occupies a greater volume than the steel. This expan- sion creates tensile stresses in the concrete, which can eventually cause cracking, delamination, and spalling (Figs. 1 and 2). Steel corrodes because it is not a naturally occurring material. Rather, iron ore is smelted and refined to produce steel. The ...

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Investigation on the Sulfuric Acid Corrosion Mechanism for ...

Being different from the mechanism of sulfate attack on concrete [11, 12, 18, 19], the sulfuric acid corrosion mechanism for concrete is the result of a combined action of dissolved corrosion caused by hydrogen ion (H +) and expanded corrosion caused by SO 4 2− (sulfate ion) .

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(PDF) Concrete deterioration by bacteriogenically induced ...

Concrete deterioration by bacteriogenically induced sulfuric acid attack. Albrecht Leis. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. READ PAPER . Concrete deterioration by bacteriogenically induced sulfuric acid attack. Download. Concrete deterioration by bacteriogenically induced sulfuric acid attack. Albrecht Leis ...

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Deterioration of Concrete Caused by Complex Attack in ...

Deterioration of Concrete Caused by Complex Attack in Sewage Treatment Plant Environment ... Most of the publications have focused on a biogenic sulfuric acid attack on concrete exposed to sewage, and not many authors have considered other aggressive phenomena, such as chloride diffusion and carbonation in a sewage environment. In this paper, the level of damage in concrete structures of

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Degradation modelling of concrete submitted to sulfuric ...

01/11/2013  In order to assess the sulfuric acid attack process in the deterioration of sewer pipe, a reactive transport model is built. This model could be used to simulate the degradation depth and compounds of cementitious materials in contact with sulfuric acid solution. The equilibrium of different solid phases and aqueous species in pore solution is considered. The transport of aqueous species is ...

Get Price

Degradation of concrete structures from influence of ...

06/01/2020  Sulfuric acid is the most severe type of acid which causes both dissolution of the calcium hydroxide as well as sulfate attached (due to the presence of sulfate ions). Any solution to prevent penetration of aggressive materials into the concrete can reduce the likelihood of acid attack. In addition, incorporation of SCMs enhances the quality of concrete and consequently prevent the acid attack.

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THE SULFURIC ACID RESISTANCE OF CONCRETE WITH BLAST ...

The deterioration of concrete by sulfuric acid attack in sewage environments has become a serious problem. In this study, it was shown that the resistance to sulfuric acid of mortar and concrete can be improved by using a blast-furnace slag fine aggregate to the total amount of fine aggregate. When mortar or concrete reacts to sulfuric acid, dihydrated gypsum film is formed around the ...

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Response of Concrete to Sulfuric Acid Attack

The response of four different concrete mixes to sulfuric acid attack was evaluated in an accelerated laboratory test program. Small test specimens cut from sta. Search. Subscribe to Email Membership. Membership. In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have itthey are engaged, informed, and stay up to date by taking ...

Get Price

Study of Effect of Chemicals (Acid) Attack on Strength and ...

sulfuric acid. Concrete cylinder specimens were immersed in various concentrations of sulfuric acid. Also, sulfuric acid was circulated over the surface of concrete. It was found that the rate of concrete deterioration caused by sulfuric acid depended on pH value of acid solutions. Also, time of exposure of concrete to acid plays a crucial role ...

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BEHAVIOUR THE CONCRETE UNDER SEVERAL ENVIRONMENTAL ...

The deterioration of concrete by sulfuric acid attacks can be characterized by loss of mass; erosion of concrete; and erosion caused by the expansion of products due to the reaction of the calcium compounds in concrete with sulfuric acid. Understanding of the performance of concrete in structures and evaluations under the sulphuric acid will lead us on the selections of the materials ...

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ACIDIC CORROSION OF HYDRATED CEMENT BASED MATERIALS

common cause of deterioration of concrete structures, since attack by which can occur in many various ways. Buried concrete structures can be attacked by groundwater. The presence of sulfuric acid in ground- -water may be either naturally or due to dumping of chemical wastes from industrial processes. In natural groundwater only sulfuric acid is likely to be found as a result of oxidation of ...

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Investigation on the Sulfuric Acid Corrosion Mechanism for ...

Being different from the mechanism of sulfate attack on concrete [11, 12, 18, 19], the sulfuric acid corrosion mechanism for concrete is the result of a combined action of dissolved corrosion caused by hydrogen ion (H +) and expanded corrosion caused by SO 4 2− (sulfate ion) .

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