The following table shows the results obtained from NormalConsistency of Cement Paste Test done on a sample of OrdinaryPortland Cement.Mass of Cement Percentage of Vicat's NeedleWater AddedTRIAL(grams)400Penetration30%4.5 mm28%26%4006.0 mm400S.0 mm9.5 mm12 mm440024%540022%40020%15 mmUsing the required penetration stated in Lecture Notes 4, determinethe mass of water needed to be added to the cement to achieve thestandard consistency of the cement paste.123 n6

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The following table shows the results obtained from Normal Consistency of Cement Paste Test done on a sample of Ordinary Portland Cement. Mass of Cement Percentage of Vicat's Needle Penetration 4.5 mm TRIAL Water Added (grams) 400 30% 28% 1 2 400 6.0 mm 400 26% S.0 mm 400 9.5 mm 24% 22% 4 5 400 12 mm 400 20% 15 mm Using the required penetration stated in Lecture Notes 4, determine the mass of water needed to be added to the cement to achieve the standard consistency of the cement paste.

The following table shows the results obtained from Normal Consistency of Cement Paste Test done on a sample of Ordinary Portland Cement. Mass of Cement Percentage of Vicat's Needle Penetration 4.5 mm TRIAL Water Added (grams) 400 30% 28% 1 2 400 6.0 mm 400 26% S.0 mm 400 9.5 mm 24% 22% 4 5 400 12 mm 400 20% 15 mm Using the required penetration stated in Lecture Notes 4, determine the mass of water needed to be added to the cement to achieve the standard consistency of the cement paste.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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In a ready-mix plant, cylindrical samples are prepared and tested periodically to detect any mix problem and to ensure that the compressive strength is higher than the lower specification limit. The minimum target value was set at 27.6 MPa. The compressive strength data shown in Table P7.48 were collected. Use one system of units only as specified by the instructor. a. Calculate the mean, standard deviation, and the coefficient of variation of the data.b. Using a spreadsheet program, create a control chart for these data showing the target value and the lower specification limit. Is the plant production meeting the specification requirement? If not, comment on possible reasons. Comment on the data scatter.
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Discuss the following properties of ordinary Portland cement and give their specification: a) Setting times, b) Soundness, c) Fineness and d) Strengths.
Wi 100 Q1/ If the weight of Cement is 3000 g and the mix proportion is 1:4:8 Calculate the following: W/C=0.35 1050mL W/C = 0.57 1710mL 1218 kg 24 148 1) The amount of water for 2) The amount of water for 3) Find the weight of fine aggregate = 4) Find the weight of coarse aggregate = kg
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1.40 In a ready-mix plant, cylindrical samples are prepared and tested periodically to detect any mix problem and to ensure that the compressive strength is higher than the lower specification limit. The minimum target value was set at 5,000 psi. The following compressive strength data were collected. Compressive Strength (psi) Compressive Strength (psi) Sample No. Sample No. 1 5595 11 6695 2 5139 12 5449 6359 13 5278 4 5192 14 6697 5 5188 15 5195 6. 5241 16 6021 7 5964 17 5320 5875 18 5657 6155 19 6595 10 5115 20 5235 a. Calculate the mean, standard deviation, and the coefficient of variation of the data. b. Using a spreadsheet program, create a control chart for these data showing the target value and the lower specification limit. Is the plant production meeting the specification requirement? If not, comment on possible rea- sons. Comment on the data scatter.
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solve each consistency and Penetration of 33 to 35mmfrom the top determines the consistency of Portland cement Trial Cement (grams) Water (grams) Penetration (mm) Consistency 1 70 30 38 2 70 25 34 3 70 20 28
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UNIT – I 1. For quality control of Portland cement, the test essentially done is A. setting time 2. Lower the normal consistency value, A. Lower will be the strength of concrete C. Higher will be the strength of concrete 3. Under normal conditions using an ordinary cement, the period of removal of the form work, B. Soundness C. tensile strength D. All the above B. Medium will be the strength of concrete D. None of the above is: ] A. 7 days for beam soffits C. 21 days for bottom beams over 6 m spans B. 14 days for bottom slabs of spans 4.6 m and more D. All The Above 4. The mixture of different ingredients of cement, is burnt at A. 1000°C ] B. 1200°C C. 1400°C D. 1900°C 5. Hydration of cement is due to chemical action of water with [ A. Tricalcium silicate and dicalcium silicate B. Dicalcium silicate and tricalcium aluminate C. Tricalcium aluminate and tetra calcium alumino ferrite D. All the above. 6. The size of vicat needle, used to conduct setting of cement is A. 10mm Dia 7. To…