MATLS 1M03 Lecture Notes - Lecture 15: Ductility, Weight Transfer, Stress (Mechanics)

• School: McMaster University
• Department: Materials Science and Engineering
• Course: MATLS 1M03
• Professor: Shooka Mahboubi

Document Summary

Guest lecture: professor nabil bassim, materials science and engineering. Concrete has been around for at least 3000 years: buildings built by the romans were impervious to water, stood the test of time, more recently, the ingalls building, the first skyscraper built with concrete. Cement: a substance that sets and hardens independently by chemical reaction and can bind other materials into a cohesive structure, portland cement. Concrete: a composite construction material made with aggregate, cement, and water. Portland cement: made from iron oxide, shale, silica, and limestone. Con(cid:272)rete produ(cid:272)tion is responsi(cid:271)le for 7% of the (cid:449)orld"s co2 emissions: all cements harden by reaction. A hardening reaction next (4 hours 4 years: composition. Water provides hydration reaction: elastic modulus is typically about 25 30 gpa. Doesn"t ha(cid:448)e a linear elasti(cid:272) (cid:271)eha(cid:448)ior (cid:271)e(cid:272)ause of (cid:448)ariations in (cid:272)onstituents. Very weak without reinforcement: steel/fiber reinforcement. Has undulating surface to help load transfer from concrete to steel.