15:54 Feb 12, 2006 |
English language (monolingual) [PRO] Tech/Engineering - Metallurgy / Casting | |||||
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| Selected response from: Kim Metzger Mexico Local time: 09:13 | ||||
Grading comment
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SUMMARY OF ALL EXPLANATIONS PROVIDED | ||||
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4 +2 | cement containing volcanic ash |
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4 +2 | pozzolanic cement |
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cement containing volcanic ash Explanation: Trass - A light coloured volcanic ash used in hydraulic cement. Trass is similar to pozzolana, but is found in Germany, France and the Netherlands. Museum of Fine Arts, Boston (2000) http://www.plasterarc.net/essay/essay/CassarT.html |
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Grading comment
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7 mins confidence: peer agreement (net): +2
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