CIVE 202 Final: CIVE 202 TEST 2 Review doc

• School: McGill University
• Department: Civil Engineering
• Course: CIVE 202
• Professor: Andrew Boyd

Document Summary

Wide variation in material properties based on specific aggregate. Definition: inert (not react chemically), granular, inorganic materials, which normally consist of stone or stone-like solids. Usage: alone road bases, fill, drainage layers, particulate composites. Portland cement concrete 65-80% aggregate by volume. Asphalt concrete 90% or more aggregate by volume. Functions: economy inexpensive filler (make concrete cheaper, dimensional stability shrinkage/expansion control, durability wear resistance, chemical attack. Classification by specific gravity: heavyweight (>3. 5) specific need for high density concrete--rarely used, normal-weight (1. 5 3. 0) 90% concrete, lightweight (<1. 0) Naturally occurring (sand, gravel: modified (crushing, washing, sieving, washing, etc. ) Artificial: industrial wastes (blast furnace slag--from making steel, man-made/specially produced (lightweight) most come from shell, reclaimed (recycled concrete) Igneous : formed during the cooling of molten rock. Sedimentary : formed by deposition and consolidation of particles. Metamorphic : formed from sedimentary rock by heat and pressure. - directly affect the workability of fresh concrete.