Use type iv cement low heat of hydration to build

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Use Type IV cement (low heat of hydration) to build massive concrete structures. 4. What is the advantage of using low-alloy steel (A706, Grade 60) over billet steel (A615, Grade 60)? The advantage of using low-alloy steel (A-706, Grade 60) over billet steel (A-615, Grade 60) is its weldability property. 5. What is the long-term effect of shrinkage and creep in concrete? The long term effect of creep in concrete is the increase of long term deformations. This could be detrimental to the stability of the structure by increasing the P- Δ effect. Shrinkage tends to produce small cracks. 6. What is the purpose of the strength reduction factors in the ACI strength design method? The purpose of the strength reduction factors is to account for: Variability in material strengths Variability in member dimensions Simplified design assumptions Discrete nature of bar sizes Importance of the element Degree of ductility and required reliability
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7. List the five types of Portland cement and the distinguishing characteristic of each type. Type I : ordinary construction Type II: moderate sulfate resistance and moderate heat of hydration Type III: high early concrete strength Type IV: low heat of hydration Type V: high sulfate resistance 8. How is the maximum strength of concrete defined?
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  • Spring '09
  • bin-shafique
  • ACI, sulfate resistance, strength reduction factors, massive concrete structures, early concrete strength

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