February 13, 2017

Bitumen Laboratory Equipment: the Colloid Mill

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 mill to the bench. There are two horizontal shelves in the body with seats for shaft bearings.

The walls...

February 13, 2017

Continuous Bitumen Emulsion Production Equipment for Road Construction

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 rotor and a stator in the first case and a closed emulsification chamber in the second. Rotary machines are most...

February 13, 2017

Bitumen Equipment for Road Construction Emulsion Production

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:

  1. mechanical emulsification
  2. acoustic emulsification
  3. physical (spontaneous) emulsification.

Accordingly, there are three types of machinery.

The first type of equipment emulsifies fluids by pushing them through a narrow gap between a...

February 13, 2017

Properties and Advantages of Bitumen Emulsions

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 materials. The strength of adhesion of this film depends on the properties of both the emulsion and the mineral. Adhesion...

February 13, 2017

Bitumen Emulsion Plants

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 storage bases are a better choice.

It is especially viable to set up emulsion production in the territory of...

February 13, 2017

Where to Buy Bitumen Emulsion Production Equipment?

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.

The main binding material in modern road construction is bitumen. However, its practical use is only possible with a certain...

Preparation And Storage of Bitumen Emulsions

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 emulsion production comprises the following mandatory steps:

  • Storage of primary components (alkali, acid, bitumen, crude fat);
  • Bringing primary...

July 20, 2016

Bitumen Adhesion - Problems and Solutions

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 different nature. In road construction, the first surface is bitumen coating and the second is the mineral material. It is...

July 4, 2016

Overview of Asphalt Emulsion Applications in North America

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 applications. Although asphalt emulsions have been in use for almost a century, use in specific applications varies significantly throughout North...

July 4, 2016

Asphalt Emulsion Manufacturing Today and Tomorrow

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 generally greater than 0.1 micrometers. The minimum stability inherent to this type of system may be increased by adding appropriate...

June 21, 2016

Bitumen or bitumen emulsion?

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.

Preparation of this material requires the use of surfactants to emulsify bitumen in water, ensure good wetting and adhesion of the...

June 13, 2016

Emulsified Asphalt

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 intensive because each year thousands of roads are repaired in the world. The old “hot” technologies consume energy, so the...

May 16, 2016

Specification for Bitumen Emulsions Certification

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 layers (strengthening), or a surface protective layer. More efficient is to use the method of slurry seals and sealcoating.  These...

April 11, 2016

The use of mastic asphalt

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 a pot or mixer and are heater to approximately 254°C to make it liquid.

Then the material is put into asphalt...

April 11, 2016

Bitumen industry in India

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 rubber impregnated bitumen. The facility has a production rate of nearly 50000 tons per annum and can be further upgraded.


September 15, 2015

Laboratory Equipment for Foamed Bitumen Production

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 bitumen is characterized by lower power consumption and lower production costs as compared with conventional bitumen production.

Foaming allows for an...

September 15, 2015

Laboratory Equipment for Modified Bitumen Emulsion

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 is determined mainly by the characteristics of bitumen binders therefore, usual bitumen was changed by polymer modified bitumen.  At first,...

September 14, 2015

Roof Mastics

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.

The first attempts to modify bitumen by polymers in order to improve its physicochemical characteristics and extend its service life, were...

September 12, 2015

How to Produce Roof Mastic

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.  Additionally, bitumen requires a thickening agent such as chalk, fragmented peat, ground slag, asbestos or wood meal to be added....

September 10, 2015

Production of Asphalt Concrete Mixtures For Road Pavement

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 of a fine-graded asphalt concrete. The latter may be also called sand asphalt. The thickness of asphalt concrete layers range...

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обновлено: June 23, 2016 автором: dannik