Colloid Mill. Colloid mills are used for creation of bitumen emulsions in laboratory conditions. It consists of a body, a conical rotor on a shaft, a stator and a product supply funnel.
The body is made of cast metal with openings for anchor bolts to secure the...Read more»
Bitumen Emulsion Production. Continuous bitumen machines can be of two types: rotary or piston. This division indicates not only the nature of the forces causing emulsification (inertia in the former type of machines and piston pressure in the latter), but also on the design of the machines: a...Read more»
Bitumen Equipment. Emulsion are made by machines and equipment with different designs and operation principles. Below is a classification of bitumen emulsion machines.
There are three methods of emulsification currently in use:
- mechanical emulsification
- acoustic emulsification
- physical (spontaneous) emulsification.
Accordingly, there are three...Read more»
Bitumen Emulsions. During road and civil construction and repairs, bitumen emulsion are used in the same manner as non-emulsified binders, such as bitumen.
When mixing mineral materials with emulsions, the latter separate and the surface of the rock is covered with a thin layer of the binding...Read more»
Bitumen Emulsion Plants. The design of modern bitumen emulsion production units allows for quick installation and dismantling for rapid transportation to a new construction site. This is sufficient for long road construction projects.
If emulsion in the area is supplied from a single site, stationary plants and...Read more»
Bitumen Emulsion Production Equipment. The condition of automobile roads is one of the objective indications of nation development and well-being of its citizens. Besides, good roads mean comfortable passenger and cargo transportation and a significant reduction of accidents. Design and construction of roads require a responsible approach.
For the production of road bitumen emulsions of various types special emulsion systems are used that can function either as individual units or as a part of a particular enterprise, plant or department.
During the processing of crude fat with conversion into emulsifier, the process of bitumen...Read more»
The quality and durability of roads surfaces depend on the adhesion strength of bituminous binders with mineral materials. If this condition is not met, then there are erosion, peeling, chipping and cracking. Pavement ceases to be water and frost-proof.
Adhesion is the interaction between contacting surfaces of...Read more»
An estimated 10% of paving-grade asphalt in North America is used in the emulsified form.
The advantages of low temperature application, solventless, or low solvent content formulations and easy modification with water-based latex emulsions make asphalt emulsions the material of choice for sealers and binders in many pavement maintenance and construction...Read more»
The most scientific, precise, and complete definition of emulsion is given by P. Becher in Emulsion Theory and Practice (1961):
An emulsion is a thermodynamically unstable heterogeneous system including at least two immiscible liquid phases of which one is dispersed in the other in the form of droplets whose diameter is...Read more»
When laying asphalt on roads and during roof construction, the main material is bitumen. It can be either molten or in the form of emulsion.
To make the coating stronger, bitumen is mixed with crushed mineral filler and special additives. Bitumen emulsion are simpler in operation, besides, they are less expensive.
The concern about energy resources depleting every year is rising. Mankind gradually starts to recall renewable energy, but it is still not capable to satisfy all business needs. Therefore there is a need not only to find “free” resources, but also save the existing ones.
Road construction sector is very energy...Read more»
Today, asphalt concrete is the main kind of pavement used in the industrialized countries. It is involved in 90-95% of motor roads surface dressing. But as almost any building material, asphalt concrete also has its disadvantages (cracks, microfractures and flaking).
Repair of asphalt concrete coating is performed either by providing additional...Read more»
Mastic asphalt has long been considered a good choice for waterproofing flat roofs, basements and foundations, along with surfacing floors, pavements etc.
The mastic is a natural product, a combination of bitumen and integral and comes in the shape of sturdy blocks.
Use of asphalt
Pieces of asphalt are put into...Read more»
The first ever bitumen plant in India was commissioned in December 2006 in Uluberia near Kolkata, in West Bengal. The plant is a facility for production of modified bitumen and emulsion, and makes an array of special bitumen products, like various kinds of bitumen emulsion, polymer modified bitumen and crumb...Read more»
Foamed bitumen is a material used when constructing asphalt concrete roads. Foamed bitumen is produced by injecting small quantities of water and compressed air into hot bitumen.
The foamed material has an increased surface activity, small relative viscosity, and a big specific area. Due to these characteristics, the production of foamed...Read more»
Modified bitumen rose to popularity in the 1960s since many worn-out upper layers of road pavement required reconditioning in many parts of the developed world. The traditional asphalt concrete failed to provide a reliable and durable road surface because of increased traffic and heavy load carrying vehicles.
The quality of bitumen...Read more»
It was in Egypt circa 3000 B.C. when bitumen was first applied for waterproofing. This material was used to seal water and grain storage tanks, to fix wall and floor plates in building structures, and to waterproof tunnels. The introduction of mastics has paralleled the development of the construction industry.
As the name may or may not imply, roof mastic is based on bitumen. Since the requirements for waterproofing coverings are very rigid, bitumen requires special additives (polymers) to be added in order to improve its water proofing performance characteristics. Polymer additives make the original material elastic, heat-resistant and cold-resistant....Read more»
Asphalt concrete pavements are used when constructing and repairing high-quality roads. Such kind of pavements may be layed in one or two layers on a macadam or a boulder base. If two layers are required, then the lower one is made of a coarse-graded asphalt concrete and the upper one...Read more»