Changes in mechanical properties and durability indices of concrete undergoing ASR expansion

Diab, S.H.; Soliman, Ahmed M.; Nokken, Michelle

doi:10.1016/j.conbuildmat.2020.118951

Cited by 17 publications

(2 citation statements)

References 27 publications

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“…The reaction develops a gel that expands by water uptake and causes concrete cracking [6][7][8]. ASR gel expansion increases the internal stresses of concrete and contributes to decrease its modulus of elasticity, flexural strength, and compressive strength, and activates/intensifies other concrete degradation processes [6,[9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

A Review on Alkali-Silica Reaction Evolution in Recycled Aggregate Concrete

2020

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Alkali-silica reaction (ASR) is one of the major degradation causes of concrete. This highly deleterious reaction has aroused the attention of researchers, in order to develop methodologies for its prevention and mitigation, but despite the efforts made, there is still no efficient cure to control its expansive consequences. The incorporation of recycled aggregates in concrete raises several ASR issues, mainly due to the difficult control of the source concrete reactivity level and the lack of knowledge on ASR’s evolution in new recycled aggregate concrete. This paper reviews several research works on ASR in concrete with recycled aggregates, and the main findings are presented in order to contribute to the knowledge and discussion of ASR in recycled aggregate concrete. It has been observed that age, exposure conditions, crushing and the heterogeneity source can influence the alkalis and reactive silica contents in the recycled aggregates. The use of low contents of highly reactive recycled aggregates as a replacement for natural aggregates can be done without an increase in expansion of concrete. ASR expansion tests and ASR mitigation measures need to be further researched to incorporate a higher content of recycled aggregates.

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Section: Introductionmentioning

confidence: 99%

A Review on Alkali-Silica Reaction Evolution in Recycled Aggregate Concrete

2020

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“…The subsequent product, expansive ASR gel, can lead to the internal stress development, cracking, and even spalling of concrete cover [7][8][9]. The cracks induced by ASR will then reduce the carrying capacity of existing concrete structures [10,11], and will also provide convenient channels for the ingress of harmful ions like chloride into concrete, causing a series of concrete durability damages [12,13].…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of electrochemical deposition techniques for healing concrete damaged by alkali silica reaction

Meng

Hou

et al. 2022

Engineering Fracture Mechanics

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Effect of reactive coarse recycled aggregate with different expansion history on alkali silica reactivity and mechanical properties of new concrete

Moghimi,

Yuksel,

Ramyar

2023

Structural Concrete

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Recycled concrete aggregates (RCA) provide an environmentally friendly solution by reducing the depletion of natural resources. This study investigates the impact of the expansion history of RCA on its reactivity with alkalis in newly produced concrete. Parent concrete samples were collected from the RILEM AAR‐4 curing cabinet (60°C and >90% RH) to produce coarse RCA with four different expansion levels (0.00%, 0.05%, 0.12%, and 0.20%). The results show that the expansion levels of the new concrete mixtures decreased as the ASR expansion history of parent concrete increased. The 20‐week compressive strength and elastic modulus of the reactive aggregate concrete containing no mineral admixture and exposed to AAR‐4 test conditions were lower than those of their water‐cured counterparts. However, no decrease was observed in the elastic modulus of concrete mixtures that showed an expansion level lower than 0.03% (the maximum expansion for nonreactive aggregate as recommended by the RILEM AAR‐4 standard).

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Changes in mechanical properties and durability indices of concrete undergoing ASR expansion

Cited by 17 publications

References 27 publications

A Review on Alkali-Silica Reaction Evolution in Recycled Aggregate Concrete

A Review on Alkali-Silica Reaction Evolution in Recycled Aggregate Concrete

Numerical modelling of electrochemical deposition techniques for healing concrete damaged by alkali silica reaction

Effect of reactive coarse recycled aggregate with different expansion history on alkali silica reactivity and mechanical properties of new concrete

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