An air-entrained concrete mix is required for a structure that is severely exposed to sulfate. Given: Required strength 35 MPa; slump 80 mm; Coarse aggregate: 19 mm nominal maximum size. The amount of water required for this mix and the corresponding air content respectively are Select one: O A. 190 Kg and 2% O B. 184 Kg and 6% O C. 184 Kg and 3.5% O D. 205 Kg and 2%

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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An air-entrained concrete mix is required for a structure that is severely exposed to sulfate. Given:
Required strength 35 MPa;
slump 80 mm;
Coarse aggregate: 19 mm nominal maximum size.
The amount of water required for this mix and the corresponding air content respectively are
Select one:
O A. 190 Kg and 2%
O B. 184 Kg and 6%
O C. 184 Kg and 3.5%
O D. 205 Kg and 2%
Transcribed Image Text:An air-entrained concrete mix is required for a structure that is severely exposed to sulfate. Given: Required strength 35 MPa; slump 80 mm; Coarse aggregate: 19 mm nominal maximum size. The amount of water required for this mix and the corresponding air content respectively are Select one: O A. 190 Kg and 2% O B. 184 Kg and 6% O C. 184 Kg and 3.5% O D. 205 Kg and 2%
To make sure that concrete has been adequately mixed:
Select one:
O A. Aggregate and cement shall be added before mixing water
O B. A good mixer shall be used.
O C. The time of mixing shall not exceed 3 minutes.
O D. Samples taken from different portions of a batch should have essentially the same strength, density, air content, and slump.
Transcribed Image Text:To make sure that concrete has been adequately mixed: Select one: O A. Aggregate and cement shall be added before mixing water O B. A good mixer shall be used. O C. The time of mixing shall not exceed 3 minutes. O D. Samples taken from different portions of a batch should have essentially the same strength, density, air content, and slump.
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