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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Textbook Question
Chapter 5, Problem 5.8QP
A sample of wet aggregate weighed 297.2 N. After drying in an oven, this sample weighed 281.5 N. The absorption of this aggregate is 2.5%. Calculate the percent of free water in the original wet sample.
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In a laboratory we are doing a series of tests on a sample of aggregate. This sample has the wet weight of 586.3 gr and dry weight of 513.9 gr. If the absorption of this aggregate is measured as 2.23%. Calculate the percent of free water in the original wet sample.
2) Two aggregates (Al and A2) were obtained from the field. They were brought to
the oven dry condition (OD) and weighed. Data for each of the aggregates is presented in the
table below. (Density of water=lg/cm³)
Table 1. Absorption capacity and moisture content data.
A1
A2
600 g
600 g
Field Weight
Oven Dry Weight
Absorption Capacity (%) | 0.6 %
595.3 g
598.3 g
0.7 %
a) Describe the field moisture state of each aggregate, Al and A2 (i.e. wet, SSD, or air dry).
For each sample would you add water or dry the sample to bring it to SSD state? Determine
the expected mass of each sample in the SSD state.
b) If the bulk volume Al oven dry is 220 cm³ and the bulk volume of A2 oven dry is 250 cm³,
determine the bulk oven dry specific gravity for each aggregate, Al and A2.
A saturated aggregate sample with an absolute volume of 5.05x10^-5 m^3 has
a mass of 178 g before drying and 139 g after drying in an oven. Assume the
water absorption by volume to be 59.18%. Determine the following:
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b. Mass specific gravity
c. Void Ratio
d. Porosity
Chapter 5 Solutions
Materials for Civil and Construction Engineers (4th Edition)
Ch. 5 - Prob. 5.1QPCh. 5 - Discuss five different desirable characteristics...Ch. 5 - Discuss five different desirable characteristics...Ch. 5 - The shape and surface texture of aggregate...Ch. 5 - Define the following terms: a. Saturated...Ch. 5 - Three samples of fine aggregate have the...Ch. 5 - A sample of wet aggregate weighed 297.2 N. After...Ch. 5 - 46.5 kg (102.3 lb) of fine aggregate is mixed with...Ch. 5 - Samples of coarse aggregate from a stockpile are...Ch. 5 - Base course aggregate has a target dry density of...
Ch. 5 - Calculate the percent voids between aggregate...Ch. 5 - Calculate the percent voids between aggregate...Ch. 5 - Coarse aggregate is placed in a rigid bucket and...Ch. 5 - The following laboratory tests are performed on...Ch. 5 - Students in the materials lab performed the...Ch. 5 - The specific gravity and absorption test (ASTM...Ch. 5 - Prob. 5.18QPCh. 5 - Calculate the sieve analysis shown in Table P5.19...Ch. 5 - Calculate the sieve analysis shown in Table P5.20,...Ch. 5 - A sieve analysis test was performed on a sample of...Ch. 5 - A sieve analysis test was performed on a sample of...Ch. 5 - Draw a graph to show the cumulative percent...Ch. 5 - Referring to Table 5.6, plot the specification...Ch. 5 - Referring to the aggregate gradations A, B, and C...Ch. 5 - Table P5.26 shows the grain size distributions of...Ch. 5 - Table P5.27 shows the grain size distributions of...Ch. 5 - Three aggregates are to be mixed together in the...Ch. 5 - Table P5.29 shows the grain size distribution for...Ch. 5 - Laboratory specific gravity and absorption tests...Ch. 5 - Table P5.31 shows the grain size distribution for...Ch. 5 - Prob. 5.32QPCh. 5 - Laboratory specific gravity and absorption tests...Ch. 5 - Prob. 5.34QPCh. 5 - Define the fineness modulus of aggregate. What is...Ch. 5 - Calculate the fineness modulus of aggregate A in...Ch. 5 - Calculate the fineness modulus of aggregate B in...Ch. 5 - A portland cement concrete mix requires mixing...Ch. 5 - Discuss the effect of the amount of material...Ch. 5 - Aggregates from three sources having the...Ch. 5 - Aggregates from three sources having the...Ch. 5 - A contractor is considering using three stockpiles...Ch. 5 - Prob. 5.43QPCh. 5 - What are the typical deleterious substances in...Ch. 5 - Review ASTM D75 and summarize the following: a....
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- 2) Two aggregates (Al and A2) were obtained from the field. They were brought to the oven dry condition (OD) and weighed. Data for each of the aggregates is presented in the table below. (Density of water=1g/cm') Table 1. Absorption capacity and moisture content data. A1 A2 Field Weight 600 g 600 g 598.3 g Oven Dry Weight Absorption Capacity (%) 0.6 % 595.3 g 0.7% a) Describe the field moisture state of each aggregate, Al and A2 (i.e. wet, SSD, or air dry). For each sample would you add water or dry the sample to bring it to SSD state? Determine the expected mass of each sample in the SSD state. b) If the bulk volume Al oven dry is 220 cm and the bulk volume of A2 oven dry is 250 cm2, determine the bulk oven dry specific gravity for each aggregate, Al and A2. MONSTER E12 PRT SC PAUSE うarrow_forwardA sample of coarse aggregate was tested in a laboratory to find its moisture content. The wet weight of the sample found to be 5403.5 gr and its dry weight after drying the sample in the oven was 5235.1 gr. Find the moisture content of the aggregate If the absorption of the aggregate was measured as 2.15%, calculate the percent of free water in the original sample.arrow_forwardd) Calculate total hardness in ppm of a solution of both 55 mg/L Al2(SO4)3 and 45 mg/L Mg(NO3)2.arrow_forward
- The mass of the container is 50.25 kg. The mass of the CA sample plus container is 1,151.50 kg. After drying, the mass of dried CA sample plus container is 1,150.80 kg. Compute the percent moisture content of the aggregate samplearrow_forward4-33. Following are results of gradation tests on three aggregates: Aggregate A 100% 92% 41% 19% 7% 4% 2% 1% Passing 25 mm (1 in.) 19 mm (3/4 in.) 9.5 mm (3/8 in.) 4.75 mm (No. 4) 2.36 mm (No. 8) 600 μm (No. 30) 300 μm (No. 50) 75 μm (No. 200) Aggregate B 100% 77% 60% 42% 36% 28% Aggregate C 100% 96% 79% 40% 16% 3% Combine these to give a gradation falling approximately in the center of the specification given in Section 4-5.1.arrow_forwardSample of coarse aggregate from a stockpile are brought to the laboratory for determination of specific gravities and absorption. The following masses were obtained.Mass of moist aggregate = 5,982 gramsMass of oven-dried aggregate = 5,892 gramsMass of aggregates submerged in water = 4,082 gramsMass of SSD aggregate = 5,897 grams a) absorption, in percentb) moisture content of stockpile aggregate, in percentc) free moisturearrow_forward
- PROBLEM 2 Aggregates samples (coarse and fine) were placed in a pan and then weighed. The weight was 1,045.1 grams. The sample was then dried at a temperature of 110 ± 5°C and was weighed after cooling to room temperature. The weight measured was 996.3 grams. Calculate the moisture content of the sample in percent. Round off to 3 decimal places.arrow_forwardQuestion 2 Calculate the moisture content and absorption capacity for the following three aggregate samples. Report the moisture state of each aggregate. a) An aggregate sample from a stockpile A has a mass of 19.00 lb. When oven-dried, it has a mass of 17.98 lb. When brought to a saturated surface dry state it has a mass of 19.00 lb. b) An aggregate sample from a stockpile B has a mass of 5.08 kg. When oven-dried, it has a mass of 5.01 kg. When brought to a saturated surface dry state it has a mass of 5.13 kg. c) An aggregate sample from a stockpile C has a mass of 53.98 lb. When oven-dried, it has a mass of 53.22 lb. When brought to a saturated surface dry state it has a mass of 53.54 Ib.arrow_forwardExample 2: Specific gravity test was conducted for a fine aggregate. If the following data was obtained during the test: - the saturated surface dry weight of the sample = 500 g. %3D - Weight of pycnometer full of water= 750 g - Weight of pycnometer and sample and water= 1050 g. - Oven dry weight of the sample is 475 g. for this aggregate, FIND - The apparent specific gravity. - The bulk specific gravity on an ssd basis. Percentage of absorption.arrow_forward
- Samples of coarse aggregate from a stockpile are brought to the laboratory for determination of specific gravities and absorption. The following masses were obtained.Mass of moist aggregate = 3,500 gramsMass of oven-dried aggregate = 3,420 gramsMass of aggregates submerged in water = 1,800 gramsMass of SSD aggregate = 3,430 gramsDetermine;a) moisture content of stockpile aggregate, in percentb) absorption, in percentc) free moisture new solution pleasearrow_forwardSamples of coarse aggregate from a stockpile are brought to the laboratory for determination of specific gravities and absorption. The following masses were obtained.Mass of moist aggregate = 3,500 gramsMass of oven-dried aggregate = 3,420 gramsMass of aggregates submerged in water = 1,800 gramsMass of SSD aggregate = 3,430 gramsDetermine;a) moisture content of stockpile aggregate, in percentb) absorption, in percentc) free moisturearrow_forwardGiven: w0=2140g, w1=2350g, w2=1105g. What is the absorption of the given coarse aggregate?arrow_forward
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