A Review on Alkali-Silica Reaction Evolution in Recycled Aggregate Concrete
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 i...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-06-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/13/11/2625 |
| _version_ | 1797565780256096256 |
|---|---|
| author | Miguel Barreto Santos Jorge De Brito António Santos Silva |
| author_facet | Miguel Barreto Santos Jorge De Brito António Santos Silva |
| author_sort | Miguel Barreto Santos |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T19:16:51Z |
| format | Article |
| id | doaj.art-4ce330a28cbf4db2be9adbe27c2239cb |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T19:16:51Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-4ce330a28cbf4db2be9adbe27c2239cb2023-11-20T03:16:32ZengMDPI AGMaterials1996-19442020-06-011311262510.3390/ma13112625A Review on Alkali-Silica Reaction Evolution in Recycled Aggregate ConcreteMiguel Barreto Santos0Jorge De Brito1António Santos Silva2School of Technology and Management, Polytechnic of Leiria, Campus 2—Morro do Lena—Alto do Vieiro, 2411-901 Leiria, PortugalCERIS, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1-1049-001 Lisbon, PortugalNational Laboratory for Civil Engineering, Av. do Brasil 101, 1700-066 Lisbon, PortugalAlkali-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.https://www.mdpi.com/1996-1944/13/11/2625alkali-silica reactionrecycled aggregateconcrete degradationtest-methodscharacterization |
| spellingShingle | Miguel Barreto Santos Jorge De Brito António Santos Silva A Review on Alkali-Silica Reaction Evolution in Recycled Aggregate Concrete Materials alkali-silica reaction recycled aggregate concrete degradation test-methods characterization |
| title | A Review on Alkali-Silica Reaction Evolution in Recycled Aggregate Concrete |
| title_full | A Review on Alkali-Silica Reaction Evolution in Recycled Aggregate Concrete |
| title_fullStr | A Review on Alkali-Silica Reaction Evolution in Recycled Aggregate Concrete |
| title_full_unstemmed | A Review on Alkali-Silica Reaction Evolution in Recycled Aggregate Concrete |
| title_short | A Review on Alkali-Silica Reaction Evolution in Recycled Aggregate Concrete |
| title_sort | review on alkali silica reaction evolution in recycled aggregate concrete |
| topic | alkali-silica reaction recycled aggregate concrete degradation test-methods characterization |
| url | https://www.mdpi.com/1996-1944/13/11/2625 |
| work_keys_str_mv | AT miguelbarretosantos areviewonalkalisilicareactionevolutioninrecycledaggregateconcrete AT jorgedebrito areviewonalkalisilicareactionevolutioninrecycledaggregateconcrete AT antoniosantossilva areviewonalkalisilicareactionevolutioninrecycledaggregateconcrete AT miguelbarretosantos reviewonalkalisilicareactionevolutioninrecycledaggregateconcrete AT jorgedebrito reviewonalkalisilicareactionevolutioninrecycledaggregateconcrete AT antoniosantossilva reviewonalkalisilicareactionevolutioninrecycledaggregateconcrete |