2. 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 saturated mass of unit = 5435 g = 5776 g oven-dry mass of unit immersed mass of unit = 2973 g 5091 g 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 require- ment for absorption?

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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2. 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 g
saturated mass of unit = 5776 g
oven-dry mass of unit = 5091 g
immersed mass of unit
2973 g
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 require-
ment for absorption?
Transcribed Image Text:2. 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 g saturated mass of unit = 5776 g oven-dry mass of unit = 5091 g immersed mass of unit 2973 g 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 require- ment for absorption?
1. A concrete masonry unit has actual gross dimensions of 7-5/8" × 7-5/8" ×
7-5/8". The unit is tested in a compression machine with the following results:
Max. failure load
Net volume = 312.7 in³
83 kips
a. Is the unit categorized as solid or hollow? Why?
b. Calculate the gross area compressive strength.
c. Calculate the net area compressive strength.
Transcribed Image Text:1. A concrete masonry unit has actual gross dimensions of 7-5/8" × 7-5/8" × 7-5/8". The unit is tested in a compression machine with the following results: Max. failure load Net volume = 312.7 in³ 83 kips a. Is the unit categorized as solid or hollow? Why? b. Calculate the gross area compressive strength. c. Calculate the net area compressive strength.
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