Technical Information Sheet CLASS 2 3 CRUSHED ROCK There are sound reasons for using Alex Fraser's Class 2 3 Crushed Rock Sieve Size AS (mm) Class 2 Limits of Grading (% Passing by Mass) Class 3 Limits of Grading (% Passing by Mass) 26 5 100 100 19 0 95-100 95-100 13 2 78-92 75-95 Effect of aggregate type on Compressive strength of concrete Abdullahi M International Journal of Civil and Structural Engineering Volume 2 Issue 3 2012 795 0 20 40 60 80 100 120 1 10 100 Sieve size (mm)) Lower limit Experimental value Upper limit Figure 3: Sieve analysis for river gravel 0 20 40 60 80 100 120 0 1 1 10 Sieve size (mm)

FOP AASTHO T 27 / T 11 (19)

Sample sizes in Table 1 are standard for aggregate sieve analysis due to equipment restraints samples may need to be divided into several "subsamples " For example a gradation that requires 100 kg (220 lbs ) of material would not fit into a large tray shaker all at once

Any sieve with an opening size smaller than the No 50 (300 m) should be cleaned with a softer cloth hair brush (Figure 4) The final total of the weights retained on each sieve should be within 0 3% of the original weight of the sample prior to grading Figure 3 Figure 4 Use Wire brush on Coarse Sieve Use Hair Brush on Fine Sieves

Fine aggregate in Portland Cement Concrete Drainage/filtration medium Blotting sand for prime coat Sand for flush seal Blotting sand for fog seal Mechanical Analysis Data 2015 % average passing Concrete Material Spec ASTM C33 Fine Aggregate Spec #N#Physical Properties ASTM C33 Fine Aggregate SD DOT Specification Sec 800 2

Crushed stone Sound durable rock particles Gravel Sound durable rock without damaging coatings Air-cooled blast furnace slag Sound durable particles with uniform density and quality or other slags that have a good service record Dry slag shall weigh at least 70 lb/ft (1120 kg/m) compacted and shall contain less

The sample size for the grading test and the complete testing shall be not less than 50 kg and 125 kg respectively In any event the sample size shall be adjusted to give the desired confidence in test results 2 4 FRACTURED FACES The crushed rock ballast shall be fully issued from crushing operations The crushed rock

Properties of Some Natural Fine Aggregates in Minna

size which was 3 29 % falling outside the range (5-70 %) The soil is also coarse grading with percentage passing 300m sieve size of 3 29 % falling outside the range (5-40 %) Soil sample 3 is fine grading and satisfy the overall grading limit except the percentage finer than 150m sieve size which was 59 92 % falling outside the range (0-15 %)

The grading of the aggregate can be distinguished based on the sieve analysis Aggregates that predominantly show size fractions in a limited range of sizes (such as the 20 mm and 10 mm aggregate in Figure 1) are called 'uniformly' graded while aggregates that show a continuous gradation of size (sand in Figure 1) are called 'well

Sample sizes in Table 1 are standard for aggregate sieve analysis due to equipment restraints samples may need to be divided into several "subsamples " For example a gradation that requires 100 kg (220 lbs ) of material would not fit into a large tray shaker all at once

Experimental Analysis of Particle Size Distribution using Electromagnetic Sieve Ujam A J and Enebe K O a Department of Mechanical and production Engineering Enugu State University of Science and Technology Enugu Nigeria b Scientific Equipment Development Institute Enugu Enugu State Nigeria

Measurement of Size Distribution of Blasted Rock Using Digital Image Processing F I Siddiqui S M Ali Shah and M Y Behan Department of Mining Engineering Mehran University of Eng and Tech Jamshoro Pakistan fahad_03mnhotmail Abstract The purpose of this study is to measure the size distribution of blasted rock using the digital

Fines: particle size fraction of an aggregate which passes the 0 063 mm sieve Grading: particle sized distribution expressed as the percentage by mass passing a specified aggregate size description Rock formation classification can be further divided into graded aggregates and single size aggregates

2 2 Rock type and grading Crushed rock is generally more stable than natural rounded stone A 36% increase in rock size is recommended for rounded rock The rock should be durable and resistant to weathering and should be proportioned so that neither the breadth nor the thickness of a single rock is less than one-third its length

In such case two or more aggregates from different sources may be combined to get the required grading Fineness modulus value can be used as a technical way to blend coarse aggregate with fine aggregate to produce desired grading Follow the steps shown below to blend aggregate using fineness modulus value

EDUCATIONAL GUIDE TO AGGREGATES

Fines: particle size fraction of an aggregate which passes the 0 063 mm sieve Grading: particle sized distribution expressed as the percentage by mass passing a specified aggregate size description Rock formation classification can be further divided into graded aggregates and single size aggregates

The AfriSam Aggregate product range ensures that every need in the aggregate fi eld is met: • Roadstone is a high quality product with specifi c grading shape and wearing properties for asphalt and road surfacing applications • Concrete aggregates include a wide range of stone sizes within target gradings as

Sieve Industrial Stone Crushed Crushed stone tilcon ny crushed stone for construction is sold by size depending upon the application for which it is to be used tilcon quarries hold trap rock granite gneiss and limestone tilcon crushed stone products are subject to rigorous quality control testing testing methods include sieve analysis grading and specific gravity

Numerical simulation of the dynamic impact breakage testing of rock 2 2 Sieve size analysis After each test the broken sample was removed from the machine and sieved to determine the size distribution The sieve sizes used were in two ranges: Simulated grading curves for a drop weight=50 kg

The UTG-0411 and UTG-0412 Sieve Shakers impart a circular motion to the material being sieved so that it makes a slow progression over the surface of the sieve The dynamic power source of the Sieve Shakers ensures that the correct vibration is imparted to the sieves and sample for quick and reliable tests