Why should a filter be made of uniformly graded aggregate? Explain.
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- Why should a filter be made of uniformly graded aggregate? Explain.
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- Subject : Environmental science Note: Don't copy from other websites and Internet. Question : What the main source of total suspended solid during construction activities?3. (a) Discuss the mechanisms that explain how a set-accelerating chemical admixture works. (b) Name 2 alternative methods (i.e. alternative to chemical admixtures) that can accelerate the setting time of Portland cement concrete and outline why these would work? (c) Give examples of concreting situations where you would choose to use the setaccelerating admixture or one of the alternatives to chemical admixtures from part (b). Explain your decision.3. (a) Discuss the mechanisms that explain how a set-accelerating chemical admixture works. (b) Name 2 alternative methods (i.e. alternative to chemical admixtures) that can accelerate the setting time of Portland cement concrete and outline why these would work? (c) Give examples of concreting situations where you would choose to use the set accelerating admixture or one of the alternatives to chemical admixtures from part (b). Explain your decision.
- Answer the following questions: 1. 35,000 units of CHB, how many samples for moisture content determination only? 2. You have 25T-25mm and 8T-12mm, how many samples? 3. You have 15,000 bags cement, how many samples should you submit for testing and how much? 4. You have 35T-20mm and 5T-16mm, how many samples? 5. You have 500 pcs of non-reinforced concrete pipes, how many samples should you submit for testing? Reference: DPWH Standard Specifications for Public Works and Highway (2004 edition), Volume IIWell TestingRESEARCH ABOUT THE GROUTING - BULK VOID FILLING. AND ITS APPLICATION AND SAMPLES