Materials for Civil and Construction Engineers (2nd Edition)
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ISBN: 9781292154411
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Textbook Question
Chapter 6, Problem 6.28QP
Under what condition is an air-entraining agent needed? Why? Discuss how the air-entraining agent performs its function. What is the typical diameter of air-entrained voids?
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Chapter 6 Solutions
Materials for Civil and Construction Engineers (2nd Edition)
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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- The height from ground floor finish to second floor finish is 3.5 meters. If the depth of the beam is 0.60 m, determine the total number of bags(40 kg) of cement using class AA mixture. Size of column is 0.50 m x 0.50 m.arrow_forwardWhat is water cement ratio? Compute the value of water cement ratio in the mix. Answer with 2 decimal places only.arrow_forwardchoose 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- 0.28arrow_forward
- The cement shall be thoroughly mixed to provide a uniform supply throughout the test and it shall be pass through what size of sieve to remove all lumps? a.) No. 20 sieve b.) No. 40 sieve c.) No. 10 sieve d.) No. 30 sievearrow_forwardShow complete and clear solution.arrow_forwardAs a material engineer in the field warehouse how will you test or check the cement delivered on site if it conforms to what is required in our material testing discuss three.arrow_forward
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