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Problem #3 A concrete masonry unit is tested for compressive strength and produces the following results:...
Hollow concrete masonry blocks typically have a net cross sectional area which is at least 25% less than the gross area....
Hollow concrete masonry blocks typically have a net cross sectional area which is at least 25% less than the gross area. (T or F) A concrete masonry unit has actual gross dimensions of 7-5/8” x 7-5/8” x 7-5/8”. The unit is tested in a compression machine with the following results. Max. failure load = 98 kips. Net volume = 348.1 in3 T or F 4. The unit is categorized as solid. _____ 5. The gross area...
1) The gross area compressive strength is calculated by dividing the load at failure by the gross cross-sectional area o...
1) The gross area compressive strength is calculated by dividing the load at failure by the gross cross-sectional area of the unit. (T or F) 2)A hollow concrete masonry unit has actual gross dimensions of 7-5/8” x 7-5/8” x 15-5/8”. If the unit fails under a load of 119.14 kips, determine the gross area compressive strength. 3) A concrete masonry unit tested as follows: Saturated mass - 10,089 g Absorption ______% Oven dry mass - 8,893 g Moisture ...
A portion of a medium-weight concrete masonry unit was tested for absorption and moisture content and...
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/m2 and the moisture content of the unit as a percent of total absorption. Does the absorption meet the ASTM C90 require- ment for absorption?
The following figure shows a section of a long reinforced concrete cantilever wall with unit weight...
The following figure shows a section of a long reinforced concrete cantilever wall with unit weight of 23.5 kN/m”. The distributed surcharge on the back of the wall is a live load. The following properties are known for the backfill: unit weight saturated unit weight shear strength parameters 7 = 17 kN/m3 7sat = 20 kN/m3 d =0 Ó' = 25° d = 20° friction angle between wall and soil a. Determine the factor of safety against overturning (about the...
reinforced concrete design , ACI code Q4 Design of isolated footings A 500 mm x 250...
reinforced concrete design , ACI code
Q4 Design of isolated footings A 500 mm x 250 mm reinforced concrete column carries unfactored dead load of 1400 kN and unfactored dead load of 600 kN. The column is supported by a rectangular footing located 2.00 meters below ground level where the allowable soil bearing capacity is 292.4 KPa and unit weight is 20 kN/m2. Concrete compressive strength is 35 MPa and reinforcing steel yield strength is 420 MPa. 1. Calculate the...
Q4 Design of isolated footings A 500 mm x 250 mm reinforced concrete column carries unfactored...
Q4 Design of isolated footings A 500 mm x 250 mm reinforced concrete column carries unfactored dead load of 1400 kN and unfactored dead load of 600 kN. The column is supported by a rectangular footing located 2.00 meters below ground level where the allowable soil bearing capacity is 292.4 KPa and unit weight is 20 kN/m2. Concrete compressive strength is 35 MPa and reinforcing steel yield strength is 420 MPa. 1. Calculate the required dimensions of a 600 mm...
Problem 3 Assume normal concrete weight (wc = 143 lb/ft) with specified compressive strength fc =...
Problem 3 Assume normal concrete weight (wc = 143 lb/ft) with specified compressive strength fc = 4,000 psi, and steel Grade 60 (fy = 60,000 psi). For design loads assume dead load wd = 30 lb/ft? (excluding self-weight) and live load wų = 100 lb/ft. Finally assume that the steel percentage ratio is equal to p= 0.18fc'/fy. Design an interior one-way simply supported slab with a 15 ft span using the above assumptions. Show sketches of one-way slab cross section,...
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/m2 and the moisture content of the unit as a percent of total absorption. Does the absorption meet the ASTM C90 require- ment for absorption?
The following figure shows a section of a long reinforced concrete cantilever wall with unit weight of 23.5 kN/m”. The distributed surcharge on the back of the wall is a live load. The following properties are known for the backfill: unit weight saturated unit weight shear strength parameters 7 = 17 kN/m3 7sat = 20 kN/m3 d =0 Ó' = 25° d = 20° friction angle between wall and soil a. Determine the factor of safety against overturning (about the...
reinforced concrete design , ACI code
Q4 Design of isolated footings A 500 mm x 250 mm reinforced concrete column carries unfactored dead load of 1400 kN and unfactored dead load of 600 kN. The column is supported by a rectangular footing located 2.00 meters below ground level where the allowable soil bearing capacity is 292.4 KPa and unit weight is 20 kN/m2. Concrete compressive strength is 35 MPa and reinforcing steel yield strength is 420 MPa. 1. Calculate the...
Q4 Design of isolated footings A 500 mm x 250 mm reinforced concrete column carries unfactored dead load of 1400 kN and unfactored dead load of 600 kN. The column is supported by a rectangular footing located 2.00 meters below ground level where the allowable soil bearing capacity is 292.4 KPa and unit weight is 20 kN/m2. Concrete compressive strength is 35 MPa and reinforcing steel yield strength is 420 MPa. 1. Calculate the required dimensions of a 600 mm...
Problem 3 Assume normal concrete weight (wc = 143 lb/ft) with specified compressive strength fc = 4,000 psi, and steel Grade 60 (fy = 60,000 psi). For design loads assume dead load wd = 30 lb/ft? (excluding self-weight) and live load wų = 100 lb/ft. Finally assume that the steel percentage ratio is equal to p= 0.18fc'/fy. Design an interior one-way simply supported slab with a 15 ft span using the above assumptions. Show sketches of one-way slab cross section,...
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