Pick out all the correct statements from the following 1. Unsoundness of cement can cause cracking and even failure if the cement is restraint. 2. A cement sample that have a specific surface area of 280 m²/Kg is expected to set faster than a sample of the same cement type that have a specific area of 160 m2/Kg 3. The final set time of cement indicates the time at which the cement has completely hardened. 4. Initial set of cement is caused by a selective hydration of C3A and C2S. Select one: O A. # 1 and 2 O B. # 1, 2 and 3 O C. # 3 and 4 O D. # 2 and 4

Pick out all the correct statements from the following 1. Unsoundness of cement can cause cracking and even failure if the cement is restraint. 2. A cement sample that have a specific surface area of 280 m²/Kg is expected to set faster than a sample of the same cement type that have a specific area of 160 m2/Kg 3. The final set time of cement indicates the time at which the cement has completely hardened. 4. Initial set of cement is caused by a selective hydration of C3A and C2S. Select one: O A. # 1 and 2 O B. # 1, 2 and 3 O C. # 3 and 4 O D. # 2 and 4

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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Tabulated results for consistency of cement are shown below. What is the water cement ratio correspond to standard consistency of the cement? Trial Mass of cement (gm) Mass of water (gm) Penetration (mm) Water-cement ratio (%) 1 60 30 10 2 60 19 6 3 60 25 8 4 60 10 2
The following table provides data obtained during a specific gravity and absorption test on coarse aggregate. Using the data, determine the a) apparent bulk specific gravity, b) bulk SSD specific gravity, and c) absorption of the coarse aggregate.
Pick out the correct statements from the following (Note: there may be more than one correct statement) Select one or more: A. A cement sample that have a specific surface area of 280 m2/Kg is expected to set faster than a sample of the same cement type that have a specific area of 160 m2/Kg B. Unsoundness of cement can cause cracking and even failure if the cement is restraint. C. Initial set of cement is caused by a selective hydration of C3A and C2S. D. The final set time of cement indicates the time at which the cement has completely hardened.
The relative amounts of the four chemicals in the final cement depends on the desired properties of the cement concrete. The table below gives the typical compound composition of different types of Portland cements Compound Composition No. C3S C,S C3A C4AF 1 60 13 9. 8 40 40 4 3 26 50 5 12 4 50 24 11 5 42 33 5 13 Depending on the properties of the different chemicals and their relative composition, identify the high early strength (HE) and low-heat (LH) cements from the table. Give detail explanation for your answer
formed? Q1: B: The specific gravity and absorption test was performed on fine aggregate and the following data were obtained: Mass of SSD sand = 500.0 g Mass of pycnometer with water only = 623.0 g Mass of pycnometer with sand and water= 938.2 g Mass of dry sand = 495.5 g Calculate the specific gravity values (dry bulk, SSD, and apparent) and the absorption of the fine aggregate.
Subject: Concrete Technology Question: a)What is the effect of the size of cement grain on hydration reaction? b)Describe how the compounds of clinker affect the properties of cement. c)When will you recommend high alumina cement in preference to low heat cement? d)Name five cement manufacturing companies in Pakistan
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Q3:(a) what are the most important types of Cement? (b) If weight of Cement (350) kg/m3 and water to cement ratio (W/C) = 0.5 The mixing ratio (1:2:3). Find the weight of material need to cast (5m3) ? (Note: Density of cement, Sand and Gravel are (1400, 1600, 1700) kg/M3 respectively
please provide step by step solutions and draw the lever on the graph as well. i know the answers. (c) About 1250 C (d) Fe3C, cementite (e) About 0.7 wt% C, about 72% (f) About 40%, no. (h) Draw the microstructure of a 1.5 wt.% C material that has been heated to 1200 C and then slowly cooled to 600 C. Clearly label all phases.
Thickening time is the time that cement stays with the ability to pump at acceptable pressures. The composition of cement and temperature affect thickening time of the cement. Excessive thickening time, over job time should be avoided to prevent_____________ a. Drilling operation will take place very fast b. Loss of hydrostatic pressure takes place c. Formation failure d. Settling and separation of cement slurry components
Which one of the following sentences is not correct? a. For many years, tensile strength has been measured in terms of the compressive strength. b. The modulus of rupture where the normal-weight concrete has an fc of 4000 psi is 474 psi. С. For lightweight concretes tensile strength depends largely on the porous aggregate. d. For normal weight concrete, the tensile strength depends primarily on the strength of bond between hardened cement paste and aggregate. 13:54
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