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ASSIGNMENT QUESTIONS - 14070_518

Engineering Aid 1 - Advanced Structural engineering guide book
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4-49. 4-50. 4-51. 4-52. 4-53. 4-54. Which of the following soils is the most desirable for soil-cement construction? 1. Silty and clayey soil that contains a relatively high percentage of clay 2. Sandy soil that is deficient in fines 3. Sandy and gravelly soil with more than 55% passing a No. 4 sieve 4. Sandy and gravelly soil that contains 10% to 35% silt and clay What is the first requirement for quality soil-cement? 1. Proper moisture content 2. Adequate cement content 3. Density  of  the  soil 4. Proper  compacting  equipment When  you  perform  laboratory  tests, composite samples should not be used because they could provide misleading  and  inaccurate  results. 1. True 2. False The required cement content for nonfrost areas is determined by which of the following tests? 1. Moisture-density 2. Freeze-thaw 3. Wet-dry 4. Both 2 and 3 above The  wet-dry  test  takes  approx- imately  how  long  to  complete? 1. 1 day 2. 2 days 3. 24 days 4. 108 days Your sample is classified as a gravelly  soil.  What  is  the  passing criteria for this type of soil when the freeze-thaw test has been performed on the sample? 1. At least 7% weight loss 2. Not more than 7% weight loss 3. At least 14% weight loss 4. Not more than 14% weight loss 4-55. The principle requirement of a soil-cement mixture is to withstand exposure  to  the  weather.  By meeting this requirement, another requirement is also met. What is that  other  requirement? 1. Strength 2. Moisture  content 3. Plasticity 4-56. The use of bitumen has which of the following  effects  on  the  soil? 1. Decreases the load-bearing capacity 2. Decreases cohesion 3. Increases the resistant to 4-57. 4-58. 4-59. water action 4. Each of the above In frost areas, tar is the recommended bituminous binder. 1. True 2. False When pollution control concerns exist, what type of bituminous product  is  recommended? 1. Asphalt cement 2. Asphalt emulsion 3. Tar 4. Cutback asphalt For a well-graded aggregate with little to no mineral filler, which of the following bituminous materials should you use? 1. MC-3000 2. MC-250 3. SS-1h 4. SC-70 23







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