Pavement MaterialsThe types of test on materials :1) Aggregate impact value test Toughness is the property of a material to resist impact. The road stones should therefore be tough enough to resist fracture under impact. A test design to evaluate the toughness of stones.Objective : To determine the toughness of road stone materials by Impact test.

Pavement materials 2) Polished Stone Value Test This test is to determine how quickly a sample of aggregate will become ‘polished’, worn smooth, by the repeated passing of tyres.The higher the polished stone value the longer the aggregate will remain rough when used in road surfacing.Equipment for this test includes an ‘accelerated polishing machine’.

Pavement materials 3) Aggregate crushing value test This test helps to determine the aggregate crushing value of coarse aggregate. The apparatus used is Cylindrical measure and plunger, Compression testing machine.

Pavement materials 4) Flakiness index test This test is used to determine the quantity of aggregate particles that are elongated, instead of cubicle, in shape. It is important in certain applications, such as concrete, where an elongated shape has larger surface area and therefore will require greater quantities of cement in order to produce concrete of the required strength. The equipment used is a series of bar sieves.

Pavement materials 5) Elongation test Objective : For determination of elongation index of coarse aggregate, where the size of coarse are larger than 6.3 mm. In this test the equipment used are : 1. Length gauge2. Sieves (63,50,40,31.5,25,20,16,12.5,10)mm3. Balance (0-10kg)4. Oven (3000c) Minimum number of 200 pieces of any specified fraction is required.

Pavement materials 6) Penetration testTo determine the consistency of bituminous material.This test also is to assess the suitability of bitumin for use under different climatic conditions and various types of construction. Penetration value is a measure of hardness or consistency of bituminous material.

Pavement materials 7) Softening test This test is done to determine the softening point of asphaltic bitumen and fluxed native asphalt, road tar, coal tar pitch and blown type bitumen .The apparatus required for this test :1. Ring and ball apparatus 2. Thermometer

Pavement materials 8) Flash and fire point testAim : to determine the flash and fire point of bitumenApparatus : pensky-marten closed tester, thermometerThe flash point of a material is the lowest temperature at which vapour of a substance momentarily take fire i the form of flash. The fire point is the lowest temperature at which the material gets ignited and burns under specific condition of test.

Pavement materials 9) Ductility test Ductility is the property of bitumen that permits it to undergo great deformation or elongation.

Pavement materials 10) Floatation testNormally the consistency of bituminous material can be measured either by penetration test or viscosity test. But, for certain range of consistencies, these tests are not applicable and float test is used.

Pavement materials 11) Soundness testThe soundness test determines an aggregate’s resistance to disintegration by weathering and, in particular, freeze-thaw cycles. The soundness test repeatedly submerge an aggregate sample in a sodium sulfate or magnesium sulfate solution.