1-What is the effect on physical properties of cement, if thel- residue of cement on B.S 90 micron sieve is greater than 10% for OPC? 2-State the meaning of normal consistency of cement. 3-What is the range of values of standard consistency of cement? 4-How the consistency of cement paste is measured? 5-State the significance of initial setting time and final setting time of cement. 6-17 ne range value of compress for normal conorato

1-What is the effect on physical properties of cement, if thel- residue of cement on B.S 90 micron sieve is greater than 10% for OPC? 2-State the meaning of normal consistency of cement. 3-What is the range of values of standard consistency of cement? 4-How the consistency of cement paste is measured? 5-State the significance of initial setting time and final setting time of cement. 6-17 ne range value of compress for normal conorato

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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The relative density of cement is 3.5. Ans for a): 3%; b) cement 12.7%, water 18.0%, coarse agg 42.1%, fine agg 24.2%
Oxide composition of 4 portland cement samples is given in the following table. Show all of your work for the following questions. a) Which cement is more suitable for early strength? Why? b) Which cement is more suitable for sulfate attack? Why? c) Which cement is more suitable for cold weather? Why? d) Which cement seems to be stored better? Why? PC 1 PC 2 PC 3 PC 4 CaO, % 61.6 62 61.6 61.9 SiO2, % 21.7 20.7 21.7 20.6 Al2O3, % 6 6.1 5.4 6.1 Fe2O3, % 2.4 1.8 2.8 1.9 MgO, % 2.6 5.3 2.4 2.9 SO3, % 2.1 2 2.1 2 K2O, % 0.5 0.6 0.8 0.9 Na2O, % 0.1 0.1 0.1 0.5 Loss on Ignition, % 0.8 1 1.2 1 Insoluble residue, % 1.5 0.9 0.8 0.9
- Why do it needto get the normal consistency of cement?- -How are these values of normal consistency become significant? -When there is 40kg of cement, mix with water, what is the volume of water needed in the mix to obtain its normal consistency, provided that the cement sample has the same brandused in the experimentregardless of the factors that may affect the results of consistency.
Calculate the amount of water required for normal consistency to the nearest 10 percent and report it to the nearest 50 percent of the weight of dry cement. For determination of normal consistency use the following data:Water Content Penetration15% 2 mm25% 5 mm35% 8 mm45% 13 mm 55% 20 mm
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
For the given amount of (weight of cement=120g, degree of hydration=100% and w/c ratio=0.40), the amount volume of gel water equal to *
Discussion 1- Compared between water / cement ratio required for standard consistency with range specified by American standards ASTM? 2- Discuss the results of your group with other groups? 3- What is the factor affecting the measurement of standard consistency of the cement paste?
a) What ingredients are used for the production of Portland cement?b) What is the role of gypsum in the production of Portland cement?c) What is a typical value for the fineness of Portland cement?d) What are the four main chemical compounds in Portland cement?
Given cement compounds: C3A = 7.3% C4AF = 12.2% C3S = 48.4% C2S = 29.7% What should be made in terms of sourcing raw materials if the manufacture wants to produce a Sulphate Resisting Portland Cement? Compare and contrast between Ordinary Portland Cement and Sulphate Resisting Portland Cement.
Determine the amount of water needed to achieved the normal consistency of 650 grams cement by using Vicat apparatus. The paste shall be of normal consistency when the rod settles to a point 10 ± 1 mm below the original surface in 30 seconds after being release. Determine the moisture content in percent if the rod penetration is 9 mm. a. 32.78% b. 30.34% c. 46.23% d. 42.51% e. 37.86%
what can you conclude form the fineness of cement experiment if the percent weigh residue is 3.38%? is this a good cement? what this cement can produce if you used it in construction
choose the correct answer The water/cement ratio needed to obtain zero porosity (Vcp=0) in a fully hydrated cement paste is: (Assume volume of cement =100 m3). (note: Vcp= Vec+Vcw) a- 0.42 b- 0.36 c- 0.50 d- 0.28