The effects of ASR on the properties of concrete and the implications for assessment

Jones, A. E. K.; Clark, Leslie

doi:10.1016/s0141-0296(97)00125-9

Cited by 36 publications

(10 citation statements)

References 3 publications

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“…135,136 Prestress developed by the ASR expansion can enhance the shear strength and stiffness of beams. 137 Visual detection of alkali-silica reactions is difficult in the early stages due to the fineness of the cracks and may go unrecognized for years. If the concrete member is unrestrained, visible concrete damage starts with small surface cracks exhibiting an irregular pattern (or map cracking).…”

Section: Acids and Basesmentioning

confidence: 99%

Primer on Durability of Nuclear Power Plant Reinforced Concrete Structures - A Review of Pertinent Factors

Naus¹

2007

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The objective of this study was to provide a primer on the environmental effects that can affect the durability of nuclear power plant concrete structures.As concrete ages, changes in its properties will occur as a result of continuing microstructural changes (i.e., slow hydration, crystallization of amorphous constituents, and reactions between cement paste and aggregates), as well as environmental influences. These changes do not have to be detrimental to the point that concrete will not be able to meet its performance requirements. Concrete, however, can suffer undesirable changes with time because of improper specifications, a violation of specifications, or adverse performance of its cement paste matrix or aggregate constituents under either physical or chemical attack. Contained in this report is a discussion on concrete durability and the relationship between durability and performance, a review of the historical perspective related to concrete and longevity, a description of the basic materials that comprise reinforced concrete, and information on the environmental factors that can affect the performance of nuclear power plant concrete structures. Commentary is provided on the importance of an aging management program.

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Section: Acids and Basesmentioning

confidence: 99%

Primer on Durability of Nuclear Power Plant Reinforced Concrete Structures - A Review of Pertinent Factors

Naus¹

2007

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“…Pillai et al [40] reported that, among all tested concretes, the concrete containing hematite aggregate showed better compressive strength than the reference concrete with granite aggregate after sustained thermal ageing for 56 days (84 MPa and 76 MPa, respectively). However, according to Jones and Clark [42], although the Young’s modulus of concrete can be significantly reduced by ASR, the apparent deterioration of concrete compressive strength due to ASR is dependent on the test method used. The cube test is particularly insensitive to ASR, with strengths after significant expansion often being greater than those at 28 days.…”

Section: Discussionmentioning

confidence: 99%

Alkali-Silica Reactivity of High Density Aggregates for Radiation Shielding Concrete

et al. 2018

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Long-term exposure of concrete to nuclear reactor environments may enhance the ageing phenomena. An investigation concerning a possible deleterious alkali-silica reaction (ASR) in concrete containing high-density aggregates is presented in this paper. The scope of this investigation was limited to heavy aggregates that could be used for the construction of the first Polish nuclear power plant (NPP). Five different high-density aggregates were selected and tested: three barites, magnetite, and hematite. Mineralogical analysis was conducted using thin section microscopic observation in transmitted light. The accelerated mortar beam test and the long-time concrete prism test were applied to estimate the susceptibility of heavy aggregates to ASR. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses were conducted on aggregates and mortars. The quartz size in aggregate grains was evaluated using image analysis. Application of the accelerated mortar beam method confirmed the observations of thin sections and XRD analysis of high-density aggregates. The microcrystalline quartz in hematite aggregate and cristobalite in one of barite aggregate triggered an ASR. The composition of ASR gel was confirmed by microscopic analysis. The long-term concrete test permitted the selection of innocuous high-density aggregates from among the other aggregates available, which showed practically no reactivity.

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“…The use of slightly crushed glass as sand is susceptible to the alkali-silica reaction (ASR), it is the result of the reaction of the amorphous silica of a granulate with the hydroxyl and alkaline ions present in the interstitial solution of the concrete. This reaction gives rise to a swelling gel causing the concrete to crack and in some cases its destruction [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Effect of glass powder and silica fume on mechanical properties and on alkali-silica reaction of recycled glass mortars

2020

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In order to value glass in the production of cement and concrete. We have verified the effect of the progressive substitution of 10% to 50% of the volume of cement by glass powder and silica fume on the mechanical properties of hardened mortars, we have also verified their inhibitory effect of the Alkali Silica Reaction (ASR) by studying the variation of mass, expansion, opening and density of cracks as well as the loss of mechanical performance of mortars undergoes a test that accelerates the ASR by autoclave. We have concluded that the use of these mineral admixtures can improve the mechanical performance of mortars, and it can reduce expansions and mechanical performance losses due to ASR.

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The effects of ASR on the properties of concrete and the implications for assessment

Cited by 36 publications

References 3 publications

Primer on Durability of Nuclear Power Plant Reinforced Concrete Structures - A Review of Pertinent Factors

Primer on Durability of Nuclear Power Plant Reinforced Concrete Structures - A Review of Pertinent Factors

Alkali-Silica Reactivity of High Density Aggregates for Radiation Shielding Concrete

Effect of glass powder and silica fume on mechanical properties and on alkali-silica reaction of recycled glass mortars

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