Theory Fineness modulus of coarse aggregates represents the average size of the particles in the coarse aggregate by an index number. It is calculated by performing sieve analysis with standard sieves. The cumulative percentage retained on each sieve is added and subtracted by 100 gives the value of fine aggregate.
What is the range of fineness modulus of coarse aggregate?
Fineness modulus of coarse aggregate varies from 5.5 to 8.0. And for all in aggregates or combined aggregates fineness modulus varies from 3.5 to 6.5. Range of fineness modulus for aggregate of different maximum sized aggregates is given below.
What is meant by fineness modulus?
The Fineness Modulus (FM) is an empirical figure obtained by adding the total percentage of the sample of an aggregate retained on each of a specified series of sieves, and dividing the sum by 100. … The same value of fineness modulus may therefore be obtained from several different particle size distributions.
What is ASTM 33?
According to ASTM C33 coarse aggregate consists of gravel, crushed gravel, crushed stone, air-cooled blast furnace slag, crushed hydraulic-cement concrete, or a combination. The use of crushed hydraulic-cement concrete may require some additional precautions.
Is 383 a sand?
Grading limits of Manufactured Sand fell within the grading Zone-II of fine aggregates as specified in IS 383. The Shape of the Manufactured Sand particles resembled the shape of river sand particles. Bulk density and specific gravity of Manufactured Sand were comparable to those of river sand.
What is fineness of cement?
The fineness of cement is property of cement which indicate the particle size of cement and specific surface area and thus indirectly effect heat of hydration. … Fineness of cement affects hydration rate hence the rate of strength gain. 2. Bleeding can be reduced by increasing fineness.
What sieve size is sand?
Sand: Material passing a 4.75-mm sieve (No. 4) and retained on a 0.075-mm (No. 200) sieve.
Is sieve a size and number?
Sieve mesh sizes are based on dimensions of the mesh size opening, or on the number of openings per linear inch.
What is fineness modulus of aggregates?
Fineness modulus of coarse aggregates represents the average size of the particles in the coarse aggregate by an index number. It is calculated by performing sieve analysis with standard sieves. The cumulative percentage retained on each sieve is added and subtracted by 100 gives the value of fine aggregate.
What is a gradation test?
A gradation test measures the size distribution, or amount of coarse and fine aggregates in a sample. … Then, pass the aggregate through the sieves from top to bottom so that large (coarse) aggregates will be re- tained on the top sieves and small (fine) aggregates will be retained on the bot- tom sieves.
How do you calculate fineness modulus of sand?
To calculate the fineness modulus of sand, the sum of the cumulative percentages retained on the following sieves are divided by 100: 150μm (No. 100), 300μm (No. 50), 600-μm (No. 30), 1.18mm (No.
Is 383 a standard?
this standard. 1.1 This standard covers the requirements for aggregates, crushed or uncrushed, derived from natural sources, such as river terraces and river- beds, glacial deposits, rocks, boulders and gravels, for use in the Production of concrete for normal structural purposes including mass concrete works.
How do you test fineness of cement?
Fineness of cement is tested in two ways : (a) By sieving. (b) By determination of specific surface (total surface area of all the particles in one gram of cement) by air-permeability apparatus. Expressed as cm2/gm or m2/kg. Generally Blaine Air permeability apparatus is used.
What is the size of cement?
What is the average particle size of cement? Explanation: Approximately 95% of cement particles are smaller than 45 microns and the average particle size is 15 microns. 4.
Is cement code tested?
IS: 4031 – chemical analysis and tests on cement.
What is grading zone of sand?
It divides the sand in four zones i.e. from Zone I to Zone IV. Zone I–Sand being very coarse and Zone 4 sand is very fine. It is generally recommended by code to use sands of zones I to Zone III for Structural concrete works.
Is Code for bulking of sand?
As per IS2386-3 Bulking in Sand, Presence of 4% of moisture content in sand increases 25% of its volume. The extent of sand bulking depends on the grading of sand. Finer Sand possesses more bulking than the medium and coarse sand.
What are the 4 main types of aggregates?
Aggregate is a landscaping term that’s used to describe coarse to medium grain material. The most common types of aggregate that are used in landscaping include: crushed stone, gravel, sand, and fill. Varying in material and stone size, each type can have its own purpose when it comes to landscaping projects.
What is ASTM C128?
ASTM C128 : Standard Test Method for Relative Density (Specific Gravity) and Absorption of Fine Aggregate.
What does ASTM stand for?
American Society for Testing and Materials (ASTM)