9.25 An aggregate blend is composed of 59% coarse aggregate by weight (Sp. Gr. 2.635), 36% fine aggregate (Sp. Gr. 2.710), and 5% filler (Sp. Gr. 2.748). The compacted specimen contains 6% asphalt binder (Sp. Gr. 1.088) by weight of total mix and has a bulk density of 2305 kg/m³. Ignoring absorption, compute the percent voids in total mix, percent voids in mineral aggregate, and the percent voids filled with asphalt.

9.25 An aggregate blend is composed of 59% coarse aggregate by weight (Sp. Gr. 2.635), 36% fine aggregate (Sp. Gr. 2.710), and 5% filler (Sp. Gr. 2.748). The compacted specimen contains 6% asphalt binder (Sp. Gr. 1.088) by weight of total mix and has a bulk density of 2305 kg/m³. Ignoring absorption, compute the percent voids in total mix, percent voids in mineral aggregate, and the percent voids filled with 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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An aggregate blend is composed of 65% coarse aggregate by weight (Sp. Gr. 2.65), 30% fine aggregate (Sp. Gr. 2.70), and 5% filler (Sp. Gr. 2.75). The compacted specimen contains 6% asphalt binder (Sp. Gr. 1.05) by weight of total mix, and has a bulk density of 2.255 Mg/m^3. Ignoring absorption. a. What is the percent voids fill with asphalt? b. What is the percent voids in mineral aggregates? c. What is the percent voids in total mix?
46.5 kg of fine aggregate is mixed with 72.3 kg of coarse aggregate. The fine aggregate has a moisture content of 2.0% and its absorption is 3.4% whereas the coarse aggregate has a moisture content of 1.3% and its absorption is 3.0%. Determine the amount of water required to increase the moisture content so that there is 1% free moisture in the aggregate blend.
Coarse aggregate is placed in a rigid container and rodded with a tamping rod. Volume of the bucket is 0.00945 m³, weight of empty bucket is 82.5N, weight of bucket filled with dry rodded coarse aggregate is 249.26N. Determine; a) the bulk unit weight of dry aggregate b) the percent voids in the aggregate if the bulk dry specific gravity of the aggregate is 2.63.
Coarse aggregate is placed in a rigid bucket and rodded with tamping rod. The volume of the bucket is 28,000 cm3 and the weight of the dry-rodded coarse aggregate is 200N. The bulk specific gravity of the aggregate is 2.72. Determine;a) the bulk unit weight of the aggregate, in kN/m3b) the percent voids between aggregate particle in the container.
Coarse aggregate is placed in a rigid bucket and rodded with tamping rod. The volume of the bucket is 20,000 cm3 and the weight of the dry-rodded coarse aggregate is 400N. The bulk specific gravity of the aggregate is 2.69. Determine;a) the bulk unit weight of the aggregate, in kN/m3b) the percent voids between aggregate particle in the container aaaaaaaaaaaaaaa
A concrete mix required for construction of an industrial building. Cement is PKC32,5. Specific gravity of cement is 31.5 kg/dm3. Vibrator will be used during the placement of concrete. The grading analysis of bulk aggregate as follows. Specific gravities and bulk density of aggregates as follows: :2.60 kg/dm3 Coarse Aggregate :2.65 kg/dm³ :2.72 kg/dm 1.30 kg/dm3 1.70 kg/dm3 1.55 kg/dm3 Sand Pebble Target strength has been desired as 20 + 5 = 25 MPa Workability of the resulting concrete will be Plastic Minimum amount cement will be 350 kg/m³ Grading of the bulk aggregate at the site: Sieve size (mm) 16 8 4 1 0.5 0.25 Cumulative Passing (%) 100 64.8 48.7 32.8 24.0 12.0 4,5 Design a concrete mix which is already solved by using Eprical Formulas according to ACI and TS and compate the results,
Problem 3 (30 points): A sample of the aggregate and compacted HMA are known to have the following physical and volumetric properties: Effective Specific Gravity of Aggregate (G) = 2.726 Specific Gravity of Binder (G,) = 1.030 Bulk Specific Gravity of Mix (G.) = 2.360 Bulk Specific Gravity of Aggregate (G) = 2.715 Maximum Specific Gravity of Mix (G) = 2.520 Binder Content (P,) = 5.0% of weight of total mix Percent of Aggregate Passing No. 200 Sieve (P) = mb. sb. mm/ 5.3% For this asphalt mix, determine the following parameters: (a) Density (b) Air voids (c) VMA (d) VFA (e) Dust to Effective Binder Ratio (%)
A compacted asphalt concrete specimen has the following propertiesAsphalt Content = 5% by total weight of the mixBulk specific gravity of the mix = 2.485Theoretical maximum specific gravity = 2.595Bulk specific gravity of the aggregate = 2.715Absorption = 1.5%Compute the percent's VTM, VMA, and VFA
H.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 A-D % Absorption = D D- (B-C) Apparent Specific Gravity = Container SSD Aggregate (A) OD Aggregate (D) Container SSD Bulk Sp.Gr. = with H,O (C) with H,O and with A-(B-C) Aggregate (B) Weight of Agg. (W,) Sp.Gr.= Weight of an equal volume of water (V,*P) PA Density of Agg. Pw Density of Water
Laboratory specific gravity and absorption tests are run on two coarse aggregate sizes, which have to be blended. The results are as follows:Aggregate A: Bulk specific gravity = 2.814; absorption = 0.4,Aggregate B: Bulk specific gravity = 2.441; absorption = 5.2,a. What is the specific gravity of a mixture of 35% aggregate A and 65%aggregate B by weight?b. What is the absorption of the mixture?
Sample of coarse aggregate from a stockpile are brought to the laboratory for determination of specific gravities and absorption. The following masses were obtained.Mass of moist aggregate = 5,982 gramsMass of oven-dried aggregate = 5,892 gramsMass of aggregates submerged in water = 4,082 gramsMass of SSD aggregate = 5,897 gramsDetermine;a) apparent specific gravityb) bulk dry specific gravityc) bulk SSD specific gravityd) absorption, in percente) moisture content of stockpile aggregate, in percentf) free moisture
Based on the data shown in Table P9.31, select the blend for a Superpave design aggregate structure. Assume <0.3 million ESAL and 19 mm nominal maximum aggregate size. TABLE P9.31 Blend Data 1 3 Gmb Gmm 2.451 2.465 2.467 2.585 2.654 2.584 Gp 1.030 1.030 1.030 P 5.9 5.5 5.8 94.1 94.5 94.2 Ра 4.5 4.5 4.5 Gşb 2.657 2.667 2.705 Hini 127 135 124 Håes 113 114 118