Aging of Bitumen Binders Bitumen, like any organic matter, is affected by factors like presence of oxygen, ultraviolet rays and changes in temperature. These factors are responsible for hardening of bitumen. Hardening results in Decrease in penetration value Increase in softening point temperature and Increase in penetration index (PI). For increased life of bituminous pavement … Read more
What are the Types of VG Bitumen As per IS:73-2006 , bitumen is classified into four types based on viscosity, as given below. VG-10 VG-20 VG-30 VG-40 What are the Requirements of Paving Bitumen (VG Bitumen) Characteristics Paving Grades or Viscosity Grade Bitumen Requirements VG-10 VG-20 VG-30 VG-40 Absolute viscosity at 600C, Poises, Min 800 … Read more
Advantages of Viscosity Grade Bitumen Viscosity grade bitumen is based on fundamental engineerin7g properties and not on empirical properties. It is a performance based grading system. Viscosity grading system takes into account both low and high temperature susceptibility of bitumen. Viscosity grade bitumen is very easy to handle as viscosity value at two different temperatures … Read more
Introduction Specific gravity is defined as the ratio of the mass of a given volume of the bituminous material to the mass of an equal volume of water, the temperature of both being specified as 270C. Apparatus Specific gravity bottle of 50 ml capacity, ordinary capillary type with 6 mm diameter neck or wide mouthed … Read more
Objective For determination of softening point of a given bitumen. Reference Standards IS : 1205-1978-Indian standard methods for testing tar and bituminious materials (Determination of softening point) Equipment & Apparatus Ring and Ball apparatus, Steel balls Brass rings Ball guide Support Thermometer Bath with stirrer Procedure Sample material is heated to a temperature between … Read more
Objective For determination of ductility of distillation residue a given bitumen. Reference Standard IS : 1208-1978- Indian standard methods for testing tar and bituminous materials (Determination of ductility) Equipment & Apparatus Briquette mould, Ductility machine with water bath and a pulling device A putty knife Thermometer Procedure The bitumen sample is maintained to a pouring … Read more
Objective To determinate the penetration of bitumen. Reference Standard IS : 1203-1978-Indian standard methods for testing tar and bituminious materials (Determination of penetration) Equipment & Apparatus Container Needle Stop watch Water bath Penetration apparatus Thermometer Procedure The bitumen is softened to a paving consistency between 750 C and 1000C above the approximate temp … Read more