Alkali-silica reaction: understanding the phenomenon

作     者：Moreira, Kelvya Maria de Vasconcelos Oliveira, Paulo Vítor Gomes de Deus, Ênio Pontes Cabral, Antônio Eduardo Bezerra 

作者机构：Engineering and Materials Science Federal University of Ceara Pici Campus Fortaleza Ceara Brazil Civil Engineering Course Vale of Acarau State University Cidao Campus Av. Dr. Guarany 317 Sobral Ceara Brazil Civil Construction Materials Laboratory Federal University of Ceara Pici Campus Fortaleza Ceara Brazil Program in Engineering and Materials Science Federal University of Ceara Pici Campus Fortaleza Ceara Brazil Program in Civil Engineering Federal University of Ceara Pici Campus Fortaleza Ceara Brazil 

出 版 物：《Journal of Building Pathology and Rehabilitation》 (J. Build. Pathol. Rehabilit.)

年 卷 期：2021年第6卷第1期

页      面：1-10页

主　　题：Alkali-silica reaction Diagnosis Mitigation measures Occurrence mechanism Review Supplementary cementitious materials 

摘      要：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. © 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG part of Springer Nature.