The mix design for an asphalt concrete mixture requires 2 to 6% minus0.075 mm. The three aggregates shown in Table P.5.34 are available.TABLE P5.34Minus 0.075 mmCoarse0.5%Intermediate1.5%Fine Aggregate11.5%Considering that approximately equal amounts of coarse and intermediateaggregate will be used in the mix, what is the percentage of fine aggregate thatwill give a resulting minus 0.075 mm in the mixture in the middle of therange, about 4%?

Solution: Given Data: Coarse=0.5%Intermediate=1.5% Fine =11.5% Approximately equal amount of…

Answered: The mix design for an asphalt concrete…

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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According to ACI 211 we require a mix with a mean 28-day compressive strength (measured on standard cylinders) of 40MPa and a slump of 25 mm, Q1 ordinary Portland cement being used. The maximum size of well-shaped, angular aggregate is 10 mm, its bulk density is 1700 kg/m3, and its specific gravity is 2.7. The available fine aggregate has a fineness modulus of 2.60 and a specific gravity of 2.58. No air entrainment is required.
The relative amounts of the four chemicals in the final cement depends on the desired properties of the cement concrete. The table below gives the typical compound composition of different types of Portland cements Compound Composition No. C3S C,S C3A C4AF 1 60 13 9. 8 40 40 4 3 26 50 5 12 4 50 24 11 5 42 33 5 13 Depending on the properties of the different chemicals and their relative composition, identify the high early strength (HE) and low-heat (LH) cements from the table. Give detail explanation for your answer
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: Buck specific gravity = 2.395; absorption = 4.69% Aggregate B: Buck specific gravity = 2.601; absorption = 0.51% What is the specific gravity of a mixture of 50]% aggregate A and 50% aggregate B by weight?
Determine the suitability of the aggregate, with the gradation tabulated below, for use in Portland cement concrete. Review the grain size distribution to determine if it meets all of the relevant specifications for use in concrete (i.e. gradation limits, fineness modulus and % fines). Refer to the specification for concrete aggregates (Table 7 – 10) below: Grain Size (mm) % Passing Cum %Retained 25 100 19 100 12.5 100 9.5 100 4.75 95 2.36 85 1.18 55 0.6 30 0.3 15 0.15 8 0.075 6
Design a Mix for the following Data. Specified strength = (99.5) MPa, Required Slump = 80 mmMaximum size of aggregate = 25 mm, FM of fine aggregate = 2.40Grading of aggregate as satisfied by ASTM C33 (American Society for Testing and Materials)SSD specific gravity of fine and coarse aggregate = 2.75Rodded bulk density of coarse aggregate = 1600 kg/cubic mAbsorption Capacity of coarse aggregate = 0.9 %Absorption Capacity of fine aggregate = 0.5 %Moisture Content of fine and coarse aggregate = 2 %Exposure Conditions = Normal
Aggregate from two stockpiles, A and B having coarse aggregate angularity (crushed faces) of 55% and 75% were blended at a ratio of 45:55 by weight, respectively. The percent materials passing the 4.75 mm sieve was 30% and 60% for stockpiles A and B, respectiIvely. What is the percent of crushed faces of the aggregate blend? Select one: O a. 63.22% O b. 65.45% O c. 59.32% O d. 70.26%
A portland cement concrete mix requires mixing sand having a gradationfollowing the midpoint of the ASTM gradation band (Table 5.4) and gravelhaving a gradation following the midpoint of size number 467 of the ASTMgradation band (Table 5.5) at a ratio of 2:3 by weight. On a 0.45 power gradation chart, plot the gradations of the sand, gravel, and the blend. Is the gradation of the blend well graded? If not, what would you call it?
The requirements and material properties of an air entrained concrete mix are given below. Calculate the weights of the components of 1 m3 of concrete. Water content: 200 kg/m3 Air content: 7.5% W/C: 0.45 (By Weight). Dry aggregate volume in 1 m3 concrete mixture: 0.44 m3 Specific Gravity (g/em3 ) water absorption capacity (%) Total Moisture (%) Cement 3.15 Fine aggregate (saturated surface dry) 2.65 1.3 5.5 Coarse aggregate (saturated surface dry) 2.7 0.5 1.5 Dry unit weight of coarse aggregate is 1,500 kg / m3. 'kind
5.6 Define the following terms: a. Saturated surface-dry condition of aggregates b. Absorption of aggregates c. Free water on aggregates d. Referring to Figure 5.9, which portion of the water in the aggregate reacts with the cement in the PCC mix?
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.
Aggregates from three sources having the properties shown in the table below where blended at a ratio of 30:45:25 by weight. Determine the properties of the aggregate blend. (Please show me in direct solution)
If needed assume the unit weight of water to be 62.4 lb/ft3 a) A HMAC sample has the following volumetric properties (i) VMA = 0.1865 ft3and (ii)Volume of air = 0.0452 ft3 Compute %VFA. b) A HMAC sample has 140 lbs of aggregate with a bulk specific gravity of 2.65 and aneffective specific gravity of 2.71. Based on this information the volume of the absorbedasphalt is ________________ft3A compacted sample of hot mix asphalt concrete sample has a unit weight of 135 lb/ft3.c) The sample has an asphalt content of 5% (by weight). Assume no absorbed asphalt.The bulk specific gravity of the aggregate is 2.65, and specific gravity for the asphaltcement is 1.05. Based on this information compute VMA for this mixture.

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