What are the advantages and disadvantages of using vermiculite to fill masonry block cavities?
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What are the advantages and disadvantages of using vermiculite to fill masonry block cavities?
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- Briefly describe the soundness of cement?PART II: TEST ON HOLLOW BLOCK Question 6 One of the ASTM Designation for testing the quality of Masonry Units is ASTM C140. One of the purpose of this standard testing method is to test and determine the absorption of the Concrete hollow block. How do you conduct the testing and determine the absorption of CHB? Use the editor to format your answerWhat is the purpose of adding gypsum while manufacturing cement; what are the consequences of making cement without gypsum?
- A portion of a normal-weight concrete masonry unit was tested for absorption and moisture content according to ASTM C140 procedure and produced the following results: Mass of unit as received: 7024 g Saturated mass of Unit: 7401 g Oven-dry mass of unit: 6916 g Immersed mass of unit: 3624 g Determine the weight classifiation according to ASTM C90 (lightweight, medium weight, or normal weight)What are the different types of cement?a Why is it important that the concrete masonry units meet certain absorp-tion requirements?b. A portion of a normal-weight concrete masonry unit was tested forabsorption and moisture content and produced the following weights:weight of unit as received = 4.3 lbsaturated weight of unit = 4.7 lboven-dry weight of unit = 4.2 lbimmersed weight of unit = 2.1 lbCalculate the absorption in lb/ft3and the moisture content of the unit as apercent of total absorption. Does the absorption meet the ASTM C90 require-ment for absorption?
- Explain the Normal Consistency of Portland Cement?What is the standard size of PCC specimens to be tested for compressive strength? If a smaller size is used, which size is expected to provide higher compressive strengths? Why? Which size provides strengths close to that of an actual concrete structure?Controlling excessive temperature gradients in large concrete masses is verycrucial. Explain in your own words four such methods available to minimize thetemperature gradient.