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 8.11QP
a)
To determine
The importance of water absorption of a concrete masonry unit meets the requirements.
b)
To determine
The water absorption and check the water absorption value against ASTM C90 requirement.
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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?
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.
6.11 a Why is it important that the concrete masonry units meet certain absorp-
tion requirements?
A portion of a normal-weight concrete masonry unit was tested for
chsorption and moisture content and produced the following weights:
weight of unit as received = 4.3 lb
saturated weight of unit = 4.7 lb
oven-dry weight of unit = 4.2 lb
immersed weight of unit
2.1 lb
Calculate the absorption in lb/ft³ and the moisture content of the unit as a
percent of total absorption. Does the absorption meet the ASTM C90 require-
ment 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 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.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 Why is it important that the concrete masonry units meet certain absorption requirements?b. A portion of a normal-weight concrete masonry unit was tested forabsorption and moisture content and produced the following masses:mass of unit as received = 1.95 kgsaturated mass of unit = 2.13 kgoven-dry mass of unit = 1.91 kgimmersed mass of unit = 0.95 kgCalculate the absorption in kg/m3and the moisture content of the unit as a percent of total absorption. Does the absorption meet the ASTM C90 requirement for absorption?arrow_forward
- a Why is it important that the concrete masonry units meet certain absorption requirements? b. A 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 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_forward4b. Deformation occurs on freshly lay concrete when it finally set or harden.discuss the various causes for dimensional changes in the hardened concrete.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_forwardindicate 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_forward6. Sample of standard brick, it's absorption equal to 17% and specific gravity equal to 1.65 the percentage of opened pores to the total volume of brick is * 20.9% 24.08% 28.05% O 27.3%arrow_forward
- (ASAP PLEASE) Design a concrete mix for the following conditions and constraints using the Absolute Volume Method. The material description are as follows: I. Design Environment i. Retaining Wall exposed to moderate sulfate exposure ii. Required Design Compressive Strength = 27.6 MPa iii. Standard Deviation of Compressive Strength of 1.8 MPa is expected (25 sample only) iv. Minimum dimension = 200 mm v. Minimum space between re-bars = 50 mm vi. Minimum cover over re-bars = 50 mm vii. Maximum Slump is required viii. Only air entrained is allowed II. Available Materials i. Air Entrained – Manufacture Specification 5.5ml/1% air/100 kg cement (use maximum or +2% air content) ii. Coarse Aggregates 25 mm Nominal Maximum Aggregate Size Rounded River Gravel (Note: apply water…arrow_forwardBy consider the following data for concrete with mild exposure, calculate the quantity of cement; Water-cement ratio is 0.50 Volume of water used is 191.6 litrearrow_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
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