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 8, Problem 8.14QP
A concrete masonry unit was tested according to ASTM C140 procedure and produced the following results:
mass of unit as received = 8271 g
saturated mass of unit = 8652 g
oven-dry mass of unit = 7781 g
For this unit, calculate (a) absorption in percent and (b) moisture content as a percent of absorption.
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A concrete masonry unit was tested according to ASTM C140 procedure and produced the following results: mass of unit as received = 10354 g saturated mass of unit = 11089 g oven-dry mass of unit = 9893 g immersed mass of unit = 5136 g Calculate the absorption in kg/m3 , percent absorption, and moisture content of the unit as a percent of total absorption.
A concrete masonry unit was tested according to ASTM C140 procedure and produced the following results:
mass of unit as received = 10,354 gsaturated mass of unit = 11,089 goven-dry mass of unit = 9,893 gimmersed mass of unit = 5,136 gCalculate the absorption in kg/m3, percent absorption, and moisture content of the unit as a percent of total absorption.
A portion of a medium-weight concrete masonry unit was tested for absorption and moisture content and produced the following results:
mass of unit as received = 5435 gsaturated mass of unit = 5776 goven-dry mass of unit = 5091 gimmersed mass of unit = 2973 gCalculate the absorption in kg/m3 and the moisture content of the unit as a percent of total absorption. Does the absorption meet the ASTM C90 requirement for absorption?
Chapter 8 Solutions
Materials for Civil and Construction Engineers (4th Edition)
Ch. 8 - Prob. 8.1QPCh. 8 - Prob. 8.2QPCh. 8 - Prob. 8.3QPCh. 8 - Prob. 8.4QPCh. 8 - Prob. 8.5QPCh. 8 - Prob. 8.6QPCh. 8 - Prob. 8.7QPCh. 8 - Prob. 8.8QPCh. 8 - Prob. 8.9QPCh. 8 - Prob. 8.10QP
Ch. 8 - Prob. 8.11QPCh. 8 - A portion of a medium-weight concrete masonry unit...Ch. 8 - A portion of a concrete masonry unit was tested...Ch. 8 - A concrete masonry unit was tested according to...Ch. 8 - Prob. 8.15QPCh. 8 - Prob. 8.16QPCh. 8 - A severe weathering clay brick was tested for...Ch. 8 - Prob. 8.18QPCh. 8 - What is the grout? What is the grout used for?Ch. 8 - Prob. 8.20QP
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- A portion of a concrete masonry unit was tested for absorption and moisture content according to ASTM C140 procedure and produced the following results:mass of unit as received = 7024 gsaturated mass of unit = 7401 goven-dry mass of unit = 6916 gimmersed mass of unit = 3624 gDetermine the following:a. percent absorptionb. moisture content of the unit as a percent of total absorptionc. dry densityd. weight classification according to ASTM C90 (lightweight, mediumweight, or normal weight)arrow_forwardA portion of a medium-weight concrete masonry unit was tested for absorption and moisture content and produced the following results: mass of unit as received = 5435 gsaturated mass of unit = 5776 goven-dry mass of unit = 5091 gimmersed mass of unit = 2973 gCalculate the absorption in kg/m3and the moisture content of the unit as apercent of total absorption. Does the absorption meet the ASTM C90 requirement for absorption?arrow_forwardA concrete masonry unit was tested according to ASTM C140 procedure andproduced the following results:mass of unit as received = 8271 gsaturated mass of unit = 8652 goven-dry mass of unit = 7781 gFor this unit, calculate (a) absorption in percent and (b) moisture content as apercent of absorption.arrow_forward
- A concrete masonry unit was tested according to ASTM C140 procedure and produce the following results:Mass of unit received = 10,100 gramsSaturated mass of unit = 10,795 gramsOven-dry mass of unit = 9,585 gramsImmersed mass of unit = 4,840 gramsDetermine: a) absorption in kg/m3b) moisture content as percent of total absorptionarrow_forwardA portion of a normal-weight concrete masonry unit was tested for absorption and moisture content and produced the following masses: mass of unit as received = 1.95 kg saturated mass of unit = 2.13 kg oven-dry mass of unit = 1.91 kg immersed mass of unit = 0.95 kg Calculate the absorption in kg/m³ and the moisture content of the unit as a percent of total absorption. Does the absorption meet the ASTM C90 requirement for absorption?arrow_forwardA concrete masonry unit tested as follows: Saturated mass - 10,089 g Oven dry mass - Field mass 58, 8,893 g 9,354 g Determine the absorption and moisture content percentages.arrow_forward
- indicate whether their inclusion to provide a concrete of equivalent 28 day strength, is likely to enhance or reduce resistance to each of the processes stated below: Alkali Silica Reaction (ASR) in concrete Chloride ingress in concrete (not corrosion) i. 11. cs Scanned with CamScannerarrow_forwardMixing and handling can significantly alter the air content of fresh concrete. Thus, field tests are used to ensure that the concrete has the proper air content prior to placing. Air content can be measured with the pressure, volumetric, gravimetric, or Chace air indicator methods. The pressure method (ASTM C231) is widely used, since it takes less time that the volumetric method. The pressure method is based on Boyle's law, which relates Figure 7.13 Consolidating concrete with an internal vibrator. pressure to volume. A calibrated cylinder (Figure 7.14) is filled with fresh concrete. The vessel is capped and air pressure is applied. The applied pressure compresses the air in the voids of the concrete. The volume of air voids is determined by measuring the amount of volume reduced by the pressure applied. This method is not valid for concrete made with lightweight aggregates, since air in the aggregate voids is also compressed, confounding the measurement of the air content of the…arrow_forwardA portion of a normal-weight concrete masonry unit was tested for absorption and moisture content according to ASTM C140 procedure and produced the following results: Mass of unit as received: 7024 g Saturated mass of Unit: 7401 g Oven-dry mass of unit: 6916 g Immersed mass of unit: 3624 g Determine the weight classifiation according to ASTM C90 (lightweight, medium weight, or normal weight)arrow_forward
- A portion of a medium-weight concrete masonry unit was tested for absorp-tion and moisture content and produced the following results:mass of unit as received = 5435 gsaturated mass of unit = 5776 goven-dry mass of unit = 5091 gimmersed mass of unit = 2973 gCalculate the absorption in kg/m3and the moisture content of the unit as apercent of total absorption. Does the absorption meet the ASTM C90 require-ment for absorption?arrow_forwardA concrete masonry unit was tested according to ASTM C140 procedure and produced thefollowing results:Mass of unit as received = 8271 gSaturated mass of unit = 8652gOven-dry mass of unit = 7781 gFor this unit, calculate (a) absorption in percent and (b) moisture content as a percent ofabsorptionarrow_forwardThe Portland Cement Association recommends a minimum cement content of for concrete placed under water.arrow_forward
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