Optimization of four different mineral additive combinations to reduce alkali silica reaction
Presence of alkali silica in aggregates that are used in concrete production causes formation of cracks anddecrease of performance over time in concrete.The first damage caused by ASR in Turkey had beenobserved in certain highway bridges in Izmir locality in 1995. It was found that some aggregates i...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Sakarya University
2018-10-01
|
| Series: | Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi |
| Subjects: | |
| Online Access: | https://dergipark.org.tr/tr/download/article-file/370233 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Presence of alkali silica in aggregates that are used in concrete production causes formation of cracks anddecrease of performance over time in concrete.The first damage caused by ASR in Turkey had beenobserved in certain highway bridges in Izmir locality in 1995. It was found that some aggregates in otherregions of Turkey also have a character to cause ASR.The purpose of the study was to minimize potentialalkali silica reaction expansion in concrete and mortars produced with the aggregates that are used inconstructions in our region.Accelerated mortar bar test method was employed in the study. It wasobserved in experimental study that that the use of 20-25% fly ash, 25-35% blast furnace slag and 10%silica fume and metakaolin as mineral additive reduced ASR.According to optimization studies, it isappropriate to use 5-10% silica fume, 5% metakaolin, 10-15% blast furnace slag and 10-20% fly ash asmineral additive in optimum mixtures giving ideal expansion value.It was found that the use of 65% ofcement together with 35% silica fume, metakaolin, blast furnace slag and fly ash in mineral additivecombinations prevents ASR. |
|---|---|
| ISSN: | 2147-835X |