6505r2 - CGN 6505 REVIEW QUESTIONS - SET NO.2 Spring 2010...

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CGN 6505 REVIEW QUESTIONS - SET NO.2 Spring 2010 AGGREGATES FOR PORTLAND CEMENT CONCRETE 1. What are the main functions of aggregate in concrete? 2. What are the desirable characteristics of aggregates for use in Portland cement concrete? 3. What are the definitions of coarse and fine aggregates? 4. What are the three major types of rock and how were they formed? What are the differences between intrusive igneous and extrusive igneous rocks? Give an example for each type of rock. How are igneous rocks classified by SiO 2 content? 5. Describe (A) the purpose of the test, (B) how the test results are reported, (C) the meaning or significance of the test results and (D) the typical threshold values for acceptance for each of the following tests on aggregates: (1) L.A. Abrasion Test (ASTM C131 & C535) (2) Aggregate Soundness Test (ASTM C88) (3) Potential Reactivity (or Mortar Bar) Test (ASTM C227) (4) Organic Impurity Test (ASTM C40) (5) Effects of Organic Impurities in Fine Aggregate on Strength of Mortar (ASTM C87)
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This note was uploaded on 05/26/2011 for the course CGN 6505 taught by Professor Mang during the Spring '11 term at University of Florida.

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6505r2 - CGN 6505 REVIEW QUESTIONS - SET NO.2 Spring 2010...

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