A concrete cylinder (diameter 100mm, height=200mm) is subjected to uniaxial compression test. The load (N)-deflection (mm) data is provided. Determine the following a. The compressive stresses and strains at each load increment b. Plot stresses versus strains on one graph c. Calculate the modulus of elasticity as the secant modulus at 40% of the ultimate stress d Determine the water-to-cement ratio and discuss why you think this stress-strain curve belongs to a concrete with this water-to-cement ratio Use: Where: . G Load (N) 0 25,000 50,000 75,000 100,000 90,000 a: Stress (MPa) P: Load (N) A: Cross sectional area of the cylinder (x-d/4) (mm) d: Cylinder's diameter (mm), a-3.14 Deflection (mm) 0 0.0182 0.03641 0.0546 0.0754 0.0854 . &= AL Lo Where: E: Strain (mm/mm) Al: Deflection (mm) Lo: Cylinder's height (mm)