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A platform for research: civil engineering, architecture and urbanism
Evaluation of the Alkali-Silica Reactivity of Sands from the Yarlung Tsangpo River in Qinghai-Tibet Plateau by Chinese Autoclave Method
The use of non-reactive aggregate is the most reliable measure for avoiding alkali aggregate reaction (AAR) in concrete. Rapid and reliable identification of the distribution of alkali-reactive aggregate in an area is important for the construction and long-term service of concrete infrastructures. In present study, about 100 river sand samples distributed over 2100-km-long of the Yarlung Tsangpo River in Qinghai-Tibet Plateau were collected, and their alkali-silica reactivity as well as the type and source of reactive constituent of expansive sample were examined by petrographic analysis and Chinese autoclave method. Results show that 13% of these sands are reactive, and the main reactive constituent are microcrystalline quartz and acid volcanics. Based on expansion measurement, petrography quantification and geological mapping, a map showing the distribution of the alkali-silica reactivity of sands in drainage basin of Yarlung Tsangpo River is established.
Evaluation of the Alkali-Silica Reactivity of Sands from the Yarlung Tsangpo River in Qinghai-Tibet Plateau by Chinese Autoclave Method
The use of non-reactive aggregate is the most reliable measure for avoiding alkali aggregate reaction (AAR) in concrete. Rapid and reliable identification of the distribution of alkali-reactive aggregate in an area is important for the construction and long-term service of concrete infrastructures. In present study, about 100 river sand samples distributed over 2100-km-long of the Yarlung Tsangpo River in Qinghai-Tibet Plateau were collected, and their alkali-silica reactivity as well as the type and source of reactive constituent of expansive sample were examined by petrographic analysis and Chinese autoclave method. Results show that 13% of these sands are reactive, and the main reactive constituent are microcrystalline quartz and acid volcanics. Based on expansion measurement, petrography quantification and geological mapping, a map showing the distribution of the alkali-silica reactivity of sands in drainage basin of Yarlung Tsangpo River is established.
Evaluation of the Alkali-Silica Reactivity of Sands from the Yarlung Tsangpo River in Qinghai-Tibet Plateau by Chinese Autoclave Method
RILEM Bookseries
Sanchez, Leandro F.M. (editor) / Trottier, Cassandra (editor) / Tang, Chengwei (author) / Lai, Wen (author) / Lu, Duyou (author) / Zhang, Jinkang (author) / Hu, Xiumian (author) / Xu, Jiangtao (author) / Deng, Min (author)
International Conference on Alkali-Aggregate Reaction in Concrete ; 2024 ; Ottawa, ON, Canada
Proceedings of the 17th International Conference on Alkali-Aggregate Reaction in Concrete ; Chapter: 46 ; 396-402
RILEM Bookseries ; 49
2024-05-04
7 pages
Article/Chapter (Book)
Electronic Resource
English
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