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Supplemental HW1 - CCEV360-04 Dillon Gauthier Supplemental...

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CCEV360-04 January 27, 2008 Dillon Gauthier Supplemental Home Problems – Aggregates Agg.1 Igneous rock comes from the cooling and hardening of molten rock —magma. The magma originates deep in the earth, and escapes through fissures and volcanoes. Sedimentary rocks are formed from accumulated deposits of soil particles or remains of certain organisms. Silica, calcium carbonate and iron oxides are abundant in soil, which act as cementing material. Tremendous weight applied to the sediment will result in sedimentary rock. Metamorphic rock results when any type of existing rock is subject to the changes brought about by combinations of heat, pressure, and movement. Diamond is a result of heat and pressure applied to carbon, and marble is a result of heat and pressure applied to limestone. Agg.2 Desirable characteristics of aggregates for optimum engineering: Aggregate must be clean, hard [dense], durable particles free of absorbed chemicals, clay, and other fines that could interrupt the cement bonding. Other
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