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Alkali Silica Reaction (ASR) potential of sand and gravels from NW-Himalayan rivers and their performance as concrete aggregate at three dams in Pakistan.

Byline: Muhammad Nawaz Chaudhry and Tariq J. Bhatti

Concrete aggregates derived from the river bed materials of many of the streams originating from the NW-Himalayan region and draining into Pakistan are found reactive in terms of Alkali-Silica Reaction (ASR). This paper describes the long term ASR related performance of concrete at three dams i.e., Warsak, Tarbela and Mangla where material from such streams has been used as concrete aggregates. On Warsak an aggressive and at Tarbela a mild ASR has been detected while at Mangla dam ASR free concrete is reported. The anomaly of occurrence and non-occurrence of ASR in concrete manufactured using aggregate derived from the same provenance has been described.

Muhammad Nawaz Chaudhry, Collage of Earth and Environmental Sciences, University of the Punjab, Lahore.

Tariq J. Bhatti, National Engineering Services Pakistan (Pvt.) Ltd., (NESPAK), Pakistan.

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Author:Chaudhry, Muhammad Nawaz; Bhatti, Tariq J.
Publication:Journal of Himalayan Earth Sciences
Article Type:Report
Geographic Code:9PAKI
Date:Dec 31, 2010
Words:138
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