Title: POTENTIAL ALKALI-SILICA REACTIVITY OF SUDANESE AGGREGATES
Abstract: This is the first systematic study of potential alkali-aggregate reactivity for the Sudan. Aggregate samples were obtained from a number of active or potential rock quarries or gravel workings. Gel- pat, ASTM C227 and NBRI tests were carried out on selected siliceous samples. Petrographic studies were also made of aggregate samples and test pieces. Reactivity was assessed in the gel-pat test between 20 and 60 degrees C, temperatures appropriate to Sudan; gel formation showed a large increase at higher temperatures. Most aggregates were found to be innocuous whereas two samples proved slowly expansive in NBRI tests. (A) For the covering abstract see IRRD 871351.
Publication Year: 1992
Publication Date: 1992-01-01
Language: en
Type: article
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