Sieve Analysis test of polystyrene bricks

SIEVE ANALYSIS TEST

The standard grain size analysis test determines the relative proportions of different grain sizes as they are distributed among certain size ranges .The grain size analysis is widely used in classification of soil. The data obtained from grain size distribution curves is used in the design of filters for earth dams and to determine the suitability of soil for road construction, air field, etc…

PROCEDURE

Take the sieves and place them one below the other in order of their size such that the sieve with larger aperture at top. Place the receiver at the bottom. Take 1000g of fine aggregate from the air-dried sample in the pan. Continuously shake the set of sieves with the sample for a period of not less than 3 minutes. The separate the sieves and fine the weight of the aggregate retained in each sieve and note down.

 SIEVE ANALYSIS TEST FOR FINE AGGREGATE

IS SIEVE SIZE	WEIGHT RETAINED IN g	%WEIGHT RETAINED	CUMULATIVE % WEIGHT RETAINED	% OF PASSING
4.75	10	1.0	1	99
2.36	15	1.5	2.5	97.5
1.18	115	11.5	14	86
600µ	390	39.0	53	47
300µ	285	28.5	81.5	18.5
150µ	150	15.0	96.5	3.5
Pan	35	3.5	100	0

RESULT

          The results of the cumulative percentage of passing of fine aggregate through various IS sieve were compared with grading limit chart for fine aggregate. IS 383-1970 show that the soil taken for the present study comes under zone 3.         

METHODOLOGY

4.1 DETAILS

Dimension of the brick size=20x10x10cm

Material dimension:

Sand size                                =                     300µ(micron)

Polystyrene beads                    =                 6-7mm

Grade of concrete                     =                 M15

Concrete ratio                          =                  1:2:4

Percentage of the material :

Cement                                   =                     14.22% 

Sand                                        =                     28.54%

Polystyrene beads                       =              57.14%

MIXING PROPERTIES

Compressive strength test: 

Mechanical test measuring the maximum amount of compressive load a material can bear before fracturing. The test piece, usually in the form of a cube, prism, or cylinder, is compressed between the platens of a compression-testing machine by a gradually applied load.

Brittle materials such as rock, brick, cast iron, and concrete may exhibit great compressive strengths; but ultimately they fracture. The crushing strength of concrete, determined by breaking a cube, and often called the cube strength, reaches values of about 3 tons per square inch, that of granite 10 tons per square inch, and that of cast iron from 25 to 60 tons per square inch.

Some ductile metals, such as mild steel, have very great compressive strengths; but the actual values are difficult to measure. When a load is applied to a ductile metal, it deforms elastically up to a certain point, and then plastic deformation occurs. Increasing loads may even completely flatten a test piece without any definite fracture occurring, so that no value can be obtained for the compressive strength. The custom of quoting tensile-strength values in these cases is inaccurate but safe, compressive strength being always greater.