Do Current Laboratory Test Methods Accurately Predict Alkali-Silica Reactivity?

Ideker, Jason H.; Bentivegna, Anthony F.; Folliard, Kevin J.; Juenger, Maria

doi:10.14359/51683914

Cited by 8 publications

(3 citation statements)

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“…7 Additionally, CPT samples exhibit alkali leaching, which can yield results that diverge from concrete exposed to natural conditions. [8][9][10] The AMBT is the most accelerated of currently available tests, yielding results in 28 days, and has become the most widely used test method. 7 However, the AMBT suffers from poor accuracy, yielding both false negatives and false positives due to unrealistically aggressive conditions.…”

Section: Current Physical Expansion Testing and Limitationsmentioning

confidence: 99%

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Chemical Detection of Expansion Susceptibility of Concrete

2024

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This experimental study evaluated the correlation between measured concrete expansion from a modified version of the miniature concrete prism test (MCPT) with the concentration of chemical markers leached from the prisms into an alkaline soak solution. Fifteen concrete mixture designs were tested for expansion and soak solution concentrations over time. The changes in expansion and soak solution concentrations were found to correlate well even with variations in alkali loading and substitution of cement with Class F fly ash. A model was developed to estimate the expansion potential of concrete based on an expansion reactivity index (ERI) that incorporated the concentrations of silicon, sulfate, calcium, and aluminum. The relationship between ERI and expansion was then used to identify potentially expansive concrete mixtures using the ERI of cores taken from a structure exhibiting potential alkalisilica reaction (ASR) expansion and concrete cylinders matching the mixture designs of the MCPT specimens.

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Section: Current Physical Expansion Testing and Limitationsmentioning

confidence: 99%

“…14 However, the test is still new and there is little data on correlation with exposure site block expansion, which the CPT does not always agree with. [8][9][10]…”

Section: Current Physical Expansion Testing and Limitationsmentioning

confidence: 99%

Chemical Detection of Expansion Susceptibility of Concrete

2024

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“…Efforts to prevent ISR in new concrete structures have led to significant research on developing laboratory tests to assess the potential of its occurrence [5][6][7]. Simultaneously, the effectiveness of different material combinations (i.e., cement type, supplementary cementitious materials) has been explored to mitigate ISR mechanisms and improve field performance [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Assessing and Forecasting ISR-Affected Critical Infrastructure: State-of-the-Art and Challenges

Bergmann,

Medeiros,

Sanchez

2023

Materials

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Internal swelling reactions (ISRs) are among the most critical deterioration mechanisms affecting infrastructure’s durability worldwide. While preventative measures for new structures have been extensively explored, effective protocols for diagnosing and prognosing ISR-affected structures, especially at their early stages, are still required. Therefore, through a comprehensive bibliometric analysis, this study focuses on exploring the evolution and current methods for assessing and forecasting ISR damage in concrete structures. For diagnosis, a shift from concrete petrography and non-destructive techniques (NDTs) towards more comprehensive methods (i.e., multi-level assessment) with the stiffness damage test (SDT) and damage rating index (DRI) is observed. Moreover, it identifies the valuable inputs from residual expansion and pore solution analysis as relevant parameters for prognosis. Based on these findings, a structured management framework is proposed aiming to refine the diagnosis and prognosis processes of ISR-affected infrastructure, ultimately contributing to improved long-term structural health and maintenance strategies.

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Assessing the Variability of Laboratory Test Procedures for Predicting Concrete Field Performance Against Alkali-Aggregate Reaction (AAR)

Bergmann,

Sanchez

2024

RILEM Bookseries

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Do Current Laboratory Test Methods Accurately Predict Alkali-Silica Reactivity?

Cited by 8 publications

References 0 publications

Chemical Detection of Expansion Susceptibility of Concrete

Chemical Detection of Expansion Susceptibility of Concrete

Assessing and Forecasting ISR-Affected Critical Infrastructure: State-of-the-Art and Challenges

Assessing the Variability of Laboratory Test Procedures for Predicting Concrete Field Performance Against Alkali-Aggregate Reaction (AAR)

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