What is bituminous emulsion?

Bitumen emulsions are usually two-phase systems consisting of two immiscible liquids, bitumen and water. The bitumen phase can be dispersed in the aqueous phase by mechanically shearing it in a colloid mill.

What is the use of emulsion bitumen?

Bitumen emulsions are by far the most commonly used binder in cold paving technologies, allowing numerous applications such as tack coats, microsurfacings and chip seals (Salomon, 2006; SFERB, 2006).

What’s the difference between emulsion and bitumen?

What is Bitumen Emulsion? Bitumen emulsion is a mixture of fine droplets of bitumen and water. But as the bitumen is a petroleum product it doesn’t mix with water and as it is sticky in nature, it doesn’t easily gets disintegrated into fine droplets. To overcome this problem an emulsifier is used.

How do you emulsify bitumen?

The method comprises storing and heating water, adding an acid, emulsifying agent and stabilising agent to the heated water to achieve an emulsified water solution, heating bitumen form heated bitumen, dispersing the heated bitumen into the emulsified water solution in a colloid mill to form a bitumen emulsion and …

How many types of bitumen are there?

There are three varieties of bitumen emulsion, namely, slow setting (SS), medium setting (MS) and rapid setting (RS) depending upon the stability provided by the emulsifying agent. It can be easily applied at ambient temperature, merely mixing it with aggregates for road works starts the binding process.

What are the grades of bitumen?

Viscosity grade bitumen in four different types including VG10, VG20, VG30, and VG40 is the most widely used bitumen in India, which has been replaced by bitumen penetration grade according to the Indian Standard (IS:73). This kind of bitumen is more reliable than others due to its advantages and properties.

What is the purpose of an emulsion?

– Most types of emulsions encountered in daily life are man-made. Their most common function is the transport of water-insoluble substances in a stable, and hence finely dispersed form, but other, more specific functions are also involved.

Which type of bituminous emulsion is used for road work?

PolyBond. Both PolyBond and PolyBond Duo are polymer-modified bituminous emulsions suitable for bond coating. While PolyBond is available in grades 50, 60 and 65, PolyBond Duo is a 2-in-1 bituminous emulsion which can be applied to both the highway layer and vertical joints at the same time using the spray tanker.

What is bitumen paint?

Bitumen Paint is a black, solvent-based, thick liquid. Bitumen Paint is a cost-effective, anti-corrosive and protective coating for a wide range of building materials. However, the paint is commonly used with iron, steel, timber, and concrete.

What is emulsion in highway engineering?

Emulsion is a binding material used for the construction of different types of highways depending on the requirements of highways. It is a mixture of asphalt cement, water, and different emulsifying agent. In the mixture of emulsion, water and cement exists in two different separate phases.

How is bitumen emulsion made?

The production of Bitumen emulsion in road construction is divided into two stages: first, the preparation of the water phase, and then emulsion production. The water phase is made up of water, emulsifier, acid (or alkali), and other additives in a special tank. The mixture has been thoroughly mixed.

What are the types of bituminous pavement?

Three types of bituminous emulsions are available, which are Rapid setting (RS), Medium setting (MS), and Slow setting (SC). Bitumen emulsions are ideal binders for hill road construction.

What are the tests for bitumen?

Bitumen Tests- Softening Point Test

The test is conducted by using Ring and Ball apparatus. A brass ring containing test sample of bitumen is suspended in liquid like water or glycerin at a given temperature. A steel ball is placed upon the bitumen sample and the liquid medium is heated at a rate of 5 C per minute.

Is bitumen emulsion flammable?

Non flammable. May evolve toxic gases (carbon/ sulphur/ nitrogen oxides, hydrogen sulphide, hydrocarbons) when heated to decomposition.

How do you increase the viscosity of bitumen emulsion?

The viscosity of bitumen emulsions increases with increased amount of acid and alkaline under extra shear provided [9]. The viscosity of bitumen emulsion is also influenced by mixing speed and time, droplet size & distribution and emulsifier concentration [10].