Materials For Civil And Construction Engineers In Si Units
4th Edition
ISBN: 9781292154404
Author: Michael S Mamlouk
Publisher: PEARSON
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Textbook Question
Chapter 6, Problem 6.11QP
What is a false set of portland cement? State one reason for false set. If false set is encountered at the job site, what would you do?
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Draw the compressive strength vs. time curves for the mortars produced by using Type I, Type III, and Type IV (ASTM) Portland Cements (PCs) on the same diagram by clearly labeling each curve. What is the primary reason for the distinct behavior observed for these different PCs? Which one would be preferred for an emergency repair works?
How to compute for required water for initial setting of Portland cement? Show the solution.
1. WHAT IS THE SIGNIFICANCE OF THE SLUMP TEST AND HOW WOULD YOU EVALUATE THE RESULT?
2. WHY IS THE WATER-CEMENT RATIO NECESSARY IN A CONCRETE MIX DESIGN?
Chapter 6 Solutions
Materials For Civil And Construction Engineers In Si Units
Ch. 6 - What ingredients are used for the production of...Ch. 6 - What is the role of gypsum in the production of...Ch. 6 - What is a typical value for the fineness of...Ch. 6 - What are the primary chemical reactions during the...Ch. 6 - Define the C-S-H phase of cement paste.Ch. 6 - What are the four main chemical compounds in...Ch. 6 - Prob. 6.7QPCh. 6 - Define a. interlayer hydration space b. capillary...Ch. 6 - Prob. 6.9QPCh. 6 - The following laboratory tests are performed: a....
Ch. 6 - What is a false set of portland cement? State one...Ch. 6 - The watercement ratio is important because it...Ch. 6 - Discuss the effect of watercement ratio on the...Ch. 6 - Draw a graph to show the general relationship...Ch. 6 - Students in the materials class prepared three...Ch. 6 - Students in the materials class prepared three...Ch. 6 - Two batches of cement mortar with properties as...Ch. 6 - What are the five primary types and functions of...Ch. 6 - Why isnt pozzolan used with Type III cement?Ch. 6 - What type of cement would you use in each of the...Ch. 6 - In order to evaluate the suitability of nonpotable...Ch. 6 - Three standard mortar cubes were made using...Ch. 6 - Four standard mortar cubes were made using...Ch. 6 - Discuss the problem of disposal of waste water...Ch. 6 - State five types of admixtures and discuss their...Ch. 6 - Prob. 6.27QPCh. 6 - Under what condition is an air-entraining agent...Ch. 6 - If a water reducer is added to the concrete mix...Ch. 6 - Prob. 6.30QPCh. 6 - A concrete mix includes the following ingredients...Ch. 6 - The results of an experiment to evaluate the...Ch. 6 - The results of a laboratory experiment to evaluate...Ch. 6 - Referring to Table P6.34, Mix No. 1 was designed...Ch. 6 - Two batches of concrete cylinders were made with...Ch. 6 - Two batches of concrete cylinders were made with...Ch. 6 - What is the source of fly ash? Why is fly ash...Ch. 6 - A materials engineer is working in a research...Ch. 6 - A materials engineer is working in a research...
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- what are the effects of the Acid Attack Test, Chloride Attack Test, and Sulphate Attack Test on the performance of geopolymer concrete based GGBS?arrow_forwardTwo batches of cement mortar with properties as shown in Table P6.18. Ifmortar cubes are made from these batches, which batch do you expect to havelarger compressive strength? Why?arrow_forwardThe maximum slump height for class seal concrete is _____. a. 2 inches b. 6 inches c. 8 inches d. 4 inches 1 set, consists of 3 samples, should be taken for every 65 cu.m of fresh concrete. TRUE FALSEarrow_forward
- what is the penetration for? does it still need to compute the water cement ratio?arrow_forwardDefine yield of cement in slurry design?arrow_forwardThe results of an experiment to evaluate the effects of a water reducer areshown in Table P6.32.a. Calculate the water–cement ratio in each of the three cases.b. Using water reducer, how can we increase the compressive strength ofconcrete without changing workability? Refer to the appropriate case inthe table.c. Using water reducer, how can we improve workability without changingthe compressive strength? Refer to the appropriate case in the table.d. Using water reducer, how can we reduce cost without changingworkability or strength? (Assume that the cost of the small amountof water reducer added is less than the cost of cement.) Refer to theappropriate case in the table.e. Summarize all possible effects of water reducers on concrete.arrow_forward
- Describe how to store sacks of cement at the construction site to protect it from the environmentarrow_forwardDescribe, in detail, why frack-wells fail so frequently. This has to do with the cement annulus. What is the purpose of the cement annulus and describe what happens when the cement annulus cracks. How can this negatively impact ground water quality?arrow_forwardplease provide answer ASAPQ#1: Part A) When concreting is needed to be performed in extreme hot weather. What are the different types of cement and admixtures which may be used to achieve better strength as well as durability of resulting concrete? Justify your answer. Part B) What is meant by compression failure in reinforced concrete flexural members? Why is it not permitted by ACI code?arrow_forward
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Types of Cement; Author: Tyler Ley;https://www.youtube.com/watch?v=cApoqFALh8s;License: Standard Youtube License