Unformatted text preview: 6. How many types of water are associated with a saturated cement paste? Describe how they affect the properties of the Portland cement paste. 7. Explain the following: (A) Why concrete fails at a stress lower than the strength of either the aggregate or the hardened cement paste. (B) Why the aggregate and hcp remain elastic until fracture in uniaxial compression test, whereas concrete shows inelastic behavior. (C) Why concrete fails in a brittle manner in tension, but is relatively tougher in compression. (D) Why the stiffness of concrete is less than either that of the aggregate or the hcp. (E) Why the permeability of concrete is higher than that of the hcp or the aggregate. (F) Why the strength of concrete decreases as the aggregate size increases....
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- Spring '11
- Mortar, Portland cement, Fly ash, cement paste