EBK MATERIALS FOR CIVIL AND CONSTRUCTIO
EBK MATERIALS FOR CIVIL AND CONSTRUCTIO
4th Edition
ISBN: 8220102719569
Author: ZANIEWSKI
Publisher: PEARSON
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Chapter 9, Problem 9.45QP

(a)

To determine

To create a control chart for the data shown in Table P9.45.

(b)

To determine

Comment on any trend and possible reasons.

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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.
In a Marshall test, the percentage of asphalt binder by total weight of aggregate is 5.0%. The bulk specifc gravity of aggregate (G3)=2.624, the specifc gravity of asphalt binder (G)=1.000, and the density of water (Y)=1.000 g/cm³. If the absorbed asphalt (Pa) is 2.00% by total weight of aggregate, and the voids in total mixture (VTM) is 4.0%, determine the following properties: a. The effective asphalt content (Pbe) b. The bulk specifc gravity of the compacted mixture (Gmb) c. The voids in mineral aggregate (VMA) d. The theoretical maximum specifc gravity of the loose mixture (Gmm) e. The voids flled with asphalt (VFA) f. The effective specifc gravity of aggregate solids (G)
Н.W. Fine aggregate sample was tested to find its physical properties. The test results were as follows: Bulk specific gravity= 2.45, Apparent specific gravity=2.5, mass of the vessel full of water = 1300 gm, mass of the vessel plus sand and topped up with water= 1500 gm, mass in wet condition 518 gm. Calculate 1- absorption% 2- moisture content% 3- Bulk density 4- Apparent density % Absorption =- *100 A-D D D Apparent Specific Gravity D- (B-C) SSD Aggregate (A) OD Aggregate (D) Container Container A with H,0 SSD Bulk Sp.Gr. = with H,0 (C) and with А-(В-С) Aggregate (B) Weight of Agg. (W.) Sp.Gr.= Weight of an equal volume of water (V,*P) W. PA Density of Agg. VA*Pw Pw Density of Water
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