Answered: Date Asphalt Content, % Date Asphalt…

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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Question

During construction of the surface layer of asphalt pavement, two samples were taken every day to measure the asphalt content in the mix to ensure that it is within the specification limits. The target value was set at 5.5% with a tolerance of +-0.4 ,. The asphalt content data shown in Table were collected: a. Calculate the mean, standard deviation, and the coefficient of variation of the data. b. Using a spreadsheet program, create a control chart for these data showing the target value and the upper and lower specification limits. Are the asphalt content data within the specification limits? Comment on any trend and possible reasons.

Date
Asphalt Content, %
Date
Asphalt Content, %
Oct. 15
5.7
Oct. 20
5.3
Oct. 15
5.8
Oct. 20
5.6
Oct. 16
5.3
Oct. 21
5.8
Oct. 16
5.4
Oct. 21
5.1
Oct. 17
5.7
Oct. 22
5.8
Oct. 17
5.7
Oct. 22
5.9
Oct. 18
5.6
Oct. 23
5.1
Oct. 18
5.8
Oct. 23
6.2
Oct. 19
5.4
Oct. 24
5.2
Oct. 19
5.5
Oct. 24
4.8

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