Materials for Civil and Construction Engineers (4th Edition)
4th Edition
ISBN: 9780134320533
Author: Michael S. Mamlouk, John P. Zaniewski
Publisher: PEARSON
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Chapter 6, Problem 6.30QP
(a)
To determine
How can the water reducer be used to improve the strength.
(b)
To determine
How can the water reducer be used to improve the workability.
(c)
To determine
How can the water reducer be used to improve the economy.
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7. A sample of fine aggregate weighs 544 g when SSD and 530 g when OD. The flask
weighs 654 g when filled with water and 985 g when filled with fine aggregate and
water. Calculate the bulk specific gravity, apparent specific gravity, and absorption.
Give the conclusion and recommendation of this experiment: DETERMINATION OF SPECIFIC GRAVITY AND ABSORPTION OF FINE AGGREGATES.
10. A sample of coarse aggregate weighs 1072 g when oven-
dried, 1091 g when saturated surface-dried, and 667.6 g
when submerged. Calculate the bulk specific gravity,
apparent specific gravity, and absorption.
Chapter 6 Solutions
Materials for Civil and Construction Engineers (4th 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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- A mix design requires 1160 kg/m3 of coarse aggregate (in dry condition), 599 kg/m3of fine aggregate (in dry condition) and 148 kg/m3 of water. The absorption capacityof the coarse aggregate is 0.4 % while the moisture content is 1.5%. The absorptioncapacity of the fine aggregate is 0.4 % while the moisture content is 4%. Pleaseanswer the following questions based on information given. a. What is the amount of Moist Coarse Aggregate? b. What is the amount of SSD Fine Aggregate? c. What is the amount of Moist Fine Aggregate? d. What is the amount of water after adjusting for moisture?arrow_forward5.17 Calculate the sieve analysis of the following aggregate and plot on a semilog gradation paper. What is the maximum size? What is the nominal maximum size? Sieve Size 25 mm (1 in.) 9.5 mm (3/8 in.) 4.75 mm (No. 4) 2.00 mm (No. 10) 0.425 mm (No. 40) 0.075 mm (No.200) Pan Amount Cumulative Amount Cumulative Percent Retained, g Retained, g 0 47.1 239.4 176.5 92.7 73.5 9.6 Retained Percent Passingarrow_forwardI need the answer as soon as possiblearrow_forward
- What is a temperature bar and why is it called temperature bar and for what purpose? You are required to pour a very large mass of concrete that would generate a very large heat of hydration what remedy can you do to reduce the heat of hydration?arrow_forwardA sieve analysis test was performed on a sample of coarse aggregate and produced the results in Tablea. Calculate the percent passing through each sieve.b. What is the maximum size?c. What is the nominal maximum size?d. Plot the percent passing versus sieve size on a semilog gradation chart.e. Plot the percent passing versus sieve size on a 0.45 gradation chart.f. Referring to Table (ASTM C33), what is the closest size number anddoes it meet the gradation for that standard size?arrow_forwardAggregates resistance to wear can be determined through Select one: O A. Aggregates soundness test. O B. Aggregates Impact value test. O C. Aggregates crushing strength test. O D. Los Angeles abrasion testarrow_forward
- After placement, the temperature of the concrete was measured and recorded by thermal sensors during the first 7 days. The temperature change with time is given in the figure below and the datum temperature of the concrete mix is known to be -5°C. If formworks are planned to be removed when 70% of maturity of the laboratory samples cured at 20 °C for 7 days is reached, what is the formwork removal time? temperature (°C) 30 28 26 mm O d. 24 O e 22 20 18 16 14 12 10 OaEarlier than 3.5 days 0 12 24 36 Ob Between 40 to 45 days OF Between 4.5 to 5 days Between 3.5 to 4 days Later that 5 days 48 60 72 84 96 108 120 132 144 156 168 age (hour)arrow_forward4. A sample of fine aggregate weighs 501.2 g when SSD and 491.6 g when OD. The flask weighs 540.6 g when filled with water and 843.1 g when filled with the aggregate sample and water. Calculate the bulk specific gravity, apparent specific gravity, and percent absorption.arrow_forwardQuestion 3arrow_forward
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