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2020
This chapter describes the sulfate attack mechanism on concrete from internal and external sources. While the internal sulfate attack comes from materials in concrete, the external sulfate attack comes from the service environment, as reported by ACI 201.2R-16. (Bates PH, Phillips AJ, Wig RJ. Action of Salts in Alkali Water and Sea Water on Cement. In:
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This chapter describes the sulfate attack mechanism on concrete from internal and external sources. While the internal sulfate attack comes from materials in concrete, the external sulfate attack comes from the service environment, as reported by ACI 201.2R-16. (Bates PH, Phillips AJ, Wig RJ. Action of Salts in Alkali Water and Sea Water on Cement. In:
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Sulfate attack expansion mechanisms
Cement and Concrete Research, 2013Abstract A specially constructed stress cell was used to measure the stress generated in thin-walled Portland cement mortar cylinders caused by external sulfate attack. The effects of sulfate concentration of the storage solution and C3A content of the cement were studied.
Wolfram Müllauer +2 more
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Selection of Portland Cement for Prevention of Sulfate Attack-Part 1 Sodium Sulfate Attack
Journal of the Korea Concrete Institute, 2009Dept. of Civil Engineering, Bucheon University, Bucheon 420-735, KoreaABSTRACT This paper presents a detailed experimental study on the sulfate resistance of specimens made with portland cementexposed to sulfate attack. The mortar specimens were immersed in a 5% sodium sulfate solution for 360 days and regularly mon-itored for visual damage ...
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Influence of clinker sulfate on cement paste external sulfate attack
Advances in Cement Research, 2013This paper aims to clarify the influence of the clinker sulfate on external sulfate attack of cement paste. The investigation shows that the clinker sulfate does not have any direct influence on the resistance of cement to external sulfate attack. Indirectly this sulfate reduces the amount of tricalcium aluminate (C3A) and tricalcium silicate (C3S ...
Horkoss, Sayed +4 more
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The Process of Sulfate Attack on Cement Mortars
Advanced Cement Based Materials, 1996Abstract The process of sulfate attack on cement mortar was studied from influences of interfacial zone between aggregate and bulk paste. The influences are the content of interfacial zone and the structure of interfacial zone. The mortar samples were prepared in accordance to a series of volume fraction of aggregate.
Shen Yang, Xu Zhongzi, Tang Mingshu
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Aspects of Sulfate Attack on Concrete
Cement, Concrete, and Aggregates, 1979Abstract This paper discusses three aspects of sulfate attack on concrete that are important in understanding the development of sulfate-resisting concretes. These are: the importance of a precipitated layer of reaction products at the surface of the concrete, the role of aggregate type in the formation of ettringite, and the importance ...
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The role of pH in thaumasite sulfate attack
Cement and Concrete Research, 2006Abstract The thaumasite form of sulfate attack (TSA) has been recognised in recent years as a distinct mechanism by which degradation of buried concrete can occur in the presence of an external source of sulfate ions. There is, however, disagreement about the role of pH.
Q. Zhou +5 more
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"Sulfate Soundness, Sulfate Attack, And Expansive Cement In Concrete"
SP-223: Investigating Concrete-Selected Works of Bryant and Katharine Mather, 2004Abstract : The paper discusses the physical and chemical effects of the phenomena associated with the formation of hydrated sulfates in concrete, aggregate, paste, and mortar. The relation of the physical properties of the material surrounding the locus at which the hydrated sulfate is produced to the amount of expansion that results, the degree to ...
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Sulfate Attack on Concrete: Research Needs
ACI Materials Journal, 1991The mechanism of sulfate attack on portland cement concrete is not well understood. This has limited confidence that can be placed in and hence the reliability of existing standard tests and models to predict performance and service life of concrete subjected to sulfate attack. A systematic research effort is necessary to establish 5 criteria.
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Expansion phenomena during sulfate attacks
2022The durability of concrete is governed by many factors, such as climate conditions, cement chemical composition, and the mechanical properties of the concrete mixture. Sulfateattack (SA) is a phenomenon that strongly affect the durability of concrete after several years, which make studying SA very challenging.
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