Give full explanationAwall form 14 ft high is filled with 160 lb per cu ft concrete at a tem perature of 70°F. The concrete is Type I without a retarder. Concrete will be placed with normal internal vibration to a depth of less than 4 ft. The rate of placement is 5 ft per hr.From Table 1, the value of Cw is 1.1 and from Table 2 the value of Cc is 1.0. The rate of placement is less than 7 ft per hr and the place ment height does not exceed 14 ft so calculate the lateral pressure by using appropriate formula. Weight of ConcreteLess than 140 lb per cu ft140 to 150 lb per cu ftMore than 150 lb per cu ftTable 1Value of C0.5 [1+ (w/145 lb per cu ft)],but not less than 0.81.0w/145 lb per cu ftTable 2Cement Type or BlendTypes I, II, and III without retarders*Types I, II, and III with a retarderOther types or blends containing less than 70%slag or 40% fly ash without retarders*Other types or blends containing less than 70%slag or 40% fly ash with a retarder*Blends containing more than 70% slag or 40% flyashValue of C1.01.21.21.41.4

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Answered: Awall form 14 ft high is filled with…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Awall form 14 ft high is filled with 160 lb per cu ft concrete at a tem perature of 70°F. The concrete is Type I without a retarder. Concrete will be placed with normal internal vibration to a depth of less than 4 ft. The rate of placement is 5 ft per hr.

From Table 1, the value of Cw is 1.1 and from Table 2 the value of Cc is 1.0. The rate of placement is less than 7 ft per hr and the place ment height does not exceed 14 ft so calculate the lateral pressure by using appropriate formula.

Weight of Concrete
Less than 140 lb per cu ft
140 to 150 lb per cu ft
More than 150 lb per cu ft
Table 1
Value of C
0.5 [1+ (w/145 lb per cu ft)],
but not less than 0.8
1.0
w/145 lb per cu ft
Table 2
Cement Type or Blend
Types I, II, and III without retarders*
Types I, II, and III with a retarder
Other types or blends containing less than 70%
slag or 40% fly ash without retarders*
Other types or blends containing less than 70%
slag or 40% fly ash with a retarder*
Blends containing more than 70% slag or 40% fly
ash
Value of C
1.0
1.2
1.2
1.4
1.4

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