BRAE433 - Chapter1a

BRAE433 Chapter1a - 1 Chapter 1 • Water cement ratio • Bags of cement • Aggregates • Modulus of elasticity • Compressive strength versus

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Unformatted text preview: 1 Chapter 1 • Water cement ratio • Bags of cement • Aggregates • Modulus of elasticity • Compressive strength versus tensile strength • Codes that apply to concrete Stress strain curves • Stress strain curves • Basic bending equations (concrete only) Concrete Water to Cement Ratio • Water to Cement Ratio – 0.4 (min), 0.55, 0.7 • Tradeoff of strength vs. workability • Bags of cement (94lb bags ) – 5 sack mix – 6 sack mix – 7 sack mix 2 Concrete Common Aggregate • Common Aggregate – Fine (sand under No. 4 sieve) – Coarse (rocks, pebbles above No. 4 sieve) • Special Aggregates Special Aggregates – Lightweight – Heavyweight Concrete Modulus of Elasticity • Compressive strength high for concrete • Comparing Modulus of Elasticity of: – E Water = 300,000 psi – E Concrete = 3,000,000 psi – E Steel = 26,000,000 psi 3 – E Water Water = 300,000 psi = 300,000 psi Modulus of Elasticity dV/V = dp/Ev – E Concrete Concrete = 3,000,000 psi = 3,000,000 psi...
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This note was uploaded on 01/13/2011 for the course BRAE 433 taught by Professor Styles during the Fall '10 term at Cal Poly.

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BRAE433 Chapter1a - 1 Chapter 1 • Water cement ratio • Bags of cement • Aggregates • Modulus of elasticity • Compressive strength versus

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