Results 201 to 210 of about 42,334 (260)
Some of the next articles are maybe not open access.
Cement and Concrete Research, 1999
Abstract Studies of, and articles on, sulfate attack have frequently assumed that this destructive mechanism simply involves the production of ettringite or gypsum. The complexity of “sulfate attack,” and of mechanisms masquerading as sulfate attack, are detailed.
William G. Hime, Bryant Mather
exaly +2 more sources
Abstract Studies of, and articles on, sulfate attack have frequently assumed that this destructive mechanism simply involves the production of ettringite or gypsum. The complexity of “sulfate attack,” and of mechanisms masquerading as sulfate attack, are detailed.
William G. Hime, Bryant Mather
exaly +2 more sources
Sulfate attack research — whither now?
Cement and Concrete Research, 2001Sulfate attack research is at a critical stage. In spite of meaningful advances in the past few years, this problem is still not well understood. Due to its complicated mechanism, the reaction between cement hydration products and sulfate-bearing solutions manifests itself in a variety of ways.
Manu Santhanam +2 more
exaly +2 more sources
External sulfate attack on alkali-activated slag
Construction and Building Materials, 2013Abstract This paper analyses the effects of external sulfate attack (5% Na2SO4 solution) on mechanical and microstructural properties of alkali-activated slag (AAS). Portland-slag cement (CEM II/А-S 42.5N) was used as a benchmark material. External sulfate attack led to a decrease in strength of CEM II, but not of AAS.
Miroslav Komljenovic
exaly +2 more sources
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
openaire +1 more source
Sulfate Attack on Blended Portland Cements
SP-192: 2000 Canmet/ACI Conference on Durability of Concrete, 2000Paste and mortar specimens were manufactured by using ordinary portland cement (OPC), C3A-free portland cement, slag cement and pozzolan cement. A carbonaceous or siliceous filler (10% by cement weight) was blended with each of the above portland cements. Limestone or quartz sands were used for mortar mixtures.
Borsoi, Antonio +4 more
openaire +1 more source
2012
Cements have long been known to undergo deterioration in sulfate-rich service environments. Yet the mechanism of attack has not been universally agreed and, arguably of even greater importance, test procedures to measure sulfate attack and specifications for sulfate-resistant formulations are not agreed, or are disputed.
Esperanza Menéndez +2 more
openaire +1 more source
Cements have long been known to undergo deterioration in sulfate-rich service environments. Yet the mechanism of attack has not been universally agreed and, arguably of even greater importance, test procedures to measure sulfate attack and specifications for sulfate-resistant formulations are not agreed, or are disputed.
Esperanza Menéndez +2 more
openaire +1 more source
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.
openaire +1 more source
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:
openaire +1 more source
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:
openaire +1 more source
Sulfate Attack on Cement-Stabilized Sand
Journal of Geotechnical and Geoenvironmental Engineering, 1999A 3.5-km (2.2 mi) section of a road in Georgia developed unexpected transverse bumps within 6 months after construction. The source of the bumps appeared to be expansion within the cement-stabilized base course. Laboratory examination of samples from areas showing distress revealed the presence of ettringite, a calcium sulfoaluminate the formation of ...
Raymond S. Rollings +2 more
openaire +1 more source
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 ...
openaire +1 more source