You are a trainee at the building site which had 3000 NFP bricks delivered. Youthen determined the compressive strength of each bricks as per SANS227 testingregulations. Bricks were ordered with a nominal compressive strength of 3,5 MPaand minimum individual value of 3,0 Mpa. The results from the lab are as follows:Compressive strengthSample 23,43,7Sample 13,4Sample 33,43,7Brick no13,733,53,53,53,23,73,23,343,253,74,13,64,073,93,43,983,13,13,13,33,33,32,93,13,63,4103,9114,13,8123,73,7From the above set of results, state whether these bricks would be accepted orrejected for based on their strength. Support your answers.

Average compressive strength of brick in each samples test:

Answered: You are a trainee at the building site…

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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A materials engineer is working in a research project to evaluate the effect of one type of admixture on the compressive strength of concrete. He tested eight mortar cubes made with admixture and eight others without admixture after 28 days of curing. The compressive strengths of cubes in MPa with and without admixture are shown in Table P6.38. Using the statistical t-test, is there a significant difference between the means of the compressive strengths of the two cement mortars at a level of signifi- cance of 0.10?
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