Answer Happy

Question No. 3 (15 points Trug & False 1. Maximum aggregate size is the first sieve to retain some aggregate, generally less than 10% 2.Fiber saturation point in wood is when the cell walls are completely dry and there is free water in the cell cavities. 3. Grout in masonry is used for finishing either exterior or interior walls. 4. Entrained air increases the risk of segregation. 5. Oxidation causes high ductility of the asphalt cement. 6. Emulsified asphalt is produced by mixing solvent with emulsifying agent and asphalt cements 7. Wood can support higher loads of short duration than sustained loads. 8. Open-Graded aggregate is aggregate missing one or two sizes 9. The two main properties of self-consolidating concrete are strength and density 10. The increase in concrete strain with time under temperature is called creep. 11. Sea water can be used to produce concrete. 12. Lime is used in mortar to increase its strength. 13. Rolling thin film asphalt test predicts how the asphalt cement changes when it is oxidized with time. 14. An asphalt binder of Performance Grade PG 58-28 is suitable for regions with high temperature between 52 and 58°C, and minimum temperature down to 28°C. 15. Gypsum is added in cement to reduce the setting time.