Modelling of the mechanical behavior of concrete affected by alkali-aggregate reaction

Ferreira, Anna Paula Guida; Farage, Michèle Cristina Resende; Barbosa, Fernando Policarpo

doi:10.1590/s0370-44672013000100005

Cited by 1 publication

(1 citation statement)

References 10 publications

(11 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These authors stated that there is a transfer of expansion along the less compressed directions. Ferreira, Farage and Barbosa [38] carried out a similar study that corroborates the above and indicates that the cracks evolve more quickly on the structure surfaces where the reaction evolves freely.…”

Section: Asr In Concrete Structuressupporting

confidence: 65%

Alkali-silica reaction: understanding the phenomenon

et al. 2021

View full text Add to dashboard Cite

The alkali-silica reaction in cementitious composites occurs through the chemical association of the solution contained in the matrix pores, which is strongly basic and rich in alkalis, and the reactive phases of some aggregates. For the process to begin, high relative humidity and a high concentration of total alkalis are required. The degradations resulting from this reaction involve expansion, cracking, exudation and decreased mechanical performance of the structure, which can cause it to break depending on the magnitude of the phenomenon. Understanding the reaction development process is necessary to propose measures that can effectively extinguish or mitigate the occurrence. One of the measures widely studied is the incorporation of supplementary cementitious materials in concrete. In Brazil, technical regulations already exist that recommend the use of these cementitious materials. The Northeast region of the country is a major producer of fly ash and granulated blast furnace slag, but not all of this material is destined for other industries. The article in question is a compendium of technical information from relevant research developed about alkali-silica reaction. His contribution is in the didactic approach that allows the understanding of students in the engineering area and professionals who do not have the expertise in the subject in order to stimulate future research on the use of supplementary cementitious materials in Northeast Brazil, mainly.

show abstract

Section: Asr In Concrete Structuressupporting

confidence: 65%