Formation of hydrates of calcium aluminates in cement pastes with different dosages of SBR powder
✍ Scribed by Ru Wang; Pei-Ming Wang
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 295 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0950-0618
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✦ Synopsis
The formation of hydrates of calcium aluminates in cement pastes in the presence of different dosages of styrene-butadiene rubber (SBR) powder was evaluated. The content of AFt, AFm, C 4 AH 13 and CAH 10 in cement pastes was determined using XRD. The results showed that SBR powder facilitates the formation of AFt and enhances its stability. The enhanced formation of AFt results from a decrease in CH formation. AFm and C 4 AH 13 appear after 7 and 28 days and both contents are decreased by SBR powder. Most C 3 A reacts with CH after the gypsum is exhausted. CAH 10 is present in the cement pastes with SBR powder.