fineness of modulus of Coarse 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 fineness modulus of the fine aggregate is required for mix proportioning, since sand gradation has the largest effect on concrete workability. Concrete made with a fine sand (low fineness modulus) has much higher paste requirements for good workability.

Fineness modulus is denoting separately by sieving coarse and fine aggregates through the following set of sieve. IS sieves for coarse aggregates are 80 mm, 40 mm, 20 mm, 10 mm or mm. IS sieves for fine aggregates are 1 mm, 600 μ, 300 μ, 212 μ, 150 μ, and 75 μ.

Limits of Fineness Modulus for Coarse Aggregates Fineness modulus of coarse aggregate varies from to And for all in aggregates or combined aggregates fineness modulus varies from .

Fineness modulus is generally used to get an idea of how coarse or fine the aggregate is. More fineness modulus value indicates that the aggregate is coarser and small value of fineness modulus indicates that the aggregate is finer

Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates1 ... coarse aggregate shall conform with the following: Nominal Maximum Size, Square Openings, mm (in.) ... such as fineness modulus, or to regulate the amount of material on a sieve. Nest the sieves in

The proportions between coarse and fine aggregates will change based on the unique characteristics of each aggregate, the placement method, and the finish desired. The dividing line between fine and coarse aggregate is the 3/8inch sieve. The fineness modulus (FM) is an index of the fineness of an aggregate.

Repeat the procedures given in Part 3 for fine aggregates, and obtain the bulk density and voids ratio for coarse aggregates. Part 5: Sample Calculations for Fineness Modulus, Bulk Density and Voids Ratio. Sieve analysis of a 1000g sample of fine aggregates resulted in the following data. Find the fineness modulus.

• The fineness modulus of the fine aggregate is required for mix design since sand gradation has the largest effect on workability. A fine sand (low FM) has much higher effect paste requirements for good workability. • The FM of the coarse aggregate is not required for mix design purposes.

Then at the end to find the fineness modulus of the crush, add the cumulated percentage of each sieve and divide it by 100, that is : Fineness modulus= (a 1 +a 2 + a 3 + a 4 + a 5 + a 6)/100; Then to find the maximum size of the coarse aggregate, refer to the column number three.

The volume of this is dependent on the fineness modulus of fine aggregates and the maximum size of coarse aggregates. Use the bulk volume, bulk density, the relative density, and water to .

The modulus of elasticity testing is used to determine the deflection of the concrete specimens that having different percentage of recycled aggregate replacement. The testing is just carried out after 28 days of casting. The resting specimen was 100mm diameter and 200 mm height.

fineness modulus of coarse aggregates viva questions answers. fineness modulus of coarse aggregates viva questions answers. fineness modulus of fine aggregate You must login to ask question, Fineness Modulus of Coarse . Read Now+ (Solved) Define the fineness modulus of aggregate. What . 1 Answer to Define the fineness modulus of aggregate.

Aggregate Characteristics Affecting Concrete Behavior Concrete Technology 22 B. Aggregate Grading(Cont'd) The fineness modulus can be considered as a weighted average size of a sieve on which the material is retained, keeping in mind that the sieves are counted from the finest. For instance, a fineness modulus of can be

Fineness modulus offers a way to quantify the average size of the aggregate particles in the concrete mix. The size of the particles, in turn, will greatly affect how easily the concrete pours and spreads, as well as its strength and durability once cured.

Oct 27, 2013· Fineness modulus is determined separately by sieving coarse and fine aggregates through the following set of sieve. IS sieves for coarse aggregates are 80 mm, 40 mm, 20 mm, 10 mm and mm. IS sieves for fine aggregates are 1 mm, 600, 300, 212, 150, and 75 .

Grading of Aggregates. The basis for mixing coarse and fine aggregates of specific fineness modulus is the presence of voids or open spaces when the aggregates are packed together. In pure coarse aggregates packing may leave 3040 percent voids, which can be removed only by filling with finer particles. Similarly, in fine aggregates also,...

For any type of mix proportioning sieve analysis results and fineness modulus is required. here is the excel sheet which includes calculations of fineness modulus. Hope it will consume less time in case of repetitive calculations. Excel Sheet For Sieve Analysis Of Aggregate And To Calculate Fineness Modulus

Coarse aggregate is the broken stone which is utilized in concrete. The coarse aggregate when is not blended with fine aggregate has no specific purpose in cement works. The volume of fine aggregate does not exceed the maximum of mm gauge and when it becomes greater that, it is called as coarse aggregate. Limit of Fineness Modulus:

Fineness Modulus a parameter for checking the uniformity of grading. Generally calculated for fine aggregates but also for coarse aggregates assuming is retained on #8 #100 sieves. Therefore, for fine and coarse aggregates respectively, the fineness modulus is: