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- W629973719 abstract "Concrete prisms were made with crushed aggregate, non-reactive sand, portland cement with added alkali content, and water in proportion of 1:1:1:0.5. The prisms were demolded after 24 hours, cured in water at room temperature for another 24 hours, then boiled under water at a constant pressure and temperature of 111 'C in an autoclave for 2 hours, cooled to room temperature and examined for presence of cracks and changes in ultrasonic pulse velocity as well as dynamic Young's modulus. Conditions for a suspect aggregate to be innocuous could be established from measurements made in aggregates collected from 12 quarries in Singapore, and on a sample of one of these aggregates mixed with an opal from Indonesia. Results obtained by this method are found to agree with those obtained by each of the three ASTM methods, Petrographic Examination, Chemical Method, and Mortar Bar Expansion Test." @default.
- W629973719 created "2016-06-24" @default.
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- W629973719 date "1997-01-01" @default.
- W629973719 modified "2023-09-24" @default.
- W629973719 title "IDENTIFYING THE ALKALI REACTIVITY OF CONCRETE AGGREGATES - TESTS ON AUTOCLAVED CONCRETE SAMPLES" @default.
- W629973719 hasPublicationYear "1997" @default.
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