Emulsion bitumen cms-2h
CMS-2h bitumen is a cationic emulsion bitumen that contains 65% bitumen, is black in color and is produced under the ASTM D 2397M-13 standard.
Emulsion is a liquid-in-liquid colloid in which tiny droplets of a liquid (such as oil) are dispersed in another liquid (such as water) without mixing (dissolving) with each other. An emulsion consists of two immiscible liquids (usually oil and water), one of which is dispersed in the form of tiny droplets in the other. The dispersed liquid is called the dispersed or internal phase and the liquid surrounding the droplets is called the continuous, closed or external phase. All liquids are divided into two general types, which include aqueous and oily. Aqueous are water and those liquids that can be dissolved in water, and other liquids are classified as oily. Of course, this division is imprecise, but it works correctly in many cases. Liquid-liquid emulsions are mainly divided into two categories: water-in-oil (W/O) and oil-in-water (O/W). In the first, the oily phase and in the second, the aqueous phase forms the continuous phase.
General Description of Cationic Asphalt Emulsion CMS-2h
Bitumen emulsion consists of three basic ingredients: bitumen, water, and an emulsifying agent. Based on specifications it may contain other additives, such as stabilizers, coating improvers, anti-strips, or break control agents. It is well known that water and asphalt will not mix, except under carefully controlled conditions using highly specialized equipment and chemical additives.
Asphalt emulsion CMS-2h is a cationic emulsion. Asphalt emulsions CMS 2h are usually made by passing the mixture of hot bitumen and water phase between a rotating disc, cone or wheel and a stator. In the emulsification process, the hot binder is mechanically separated into minute globules and dispersed in water treated with a small quantity of emulsifying agent. The water is called the continuous phase and the globules of the binder are called the discontinuous phase.by proper selection of an emulsifying agent and other manufacturing controls.
Application of asphalt emulsion CMS-2h
Cationic emulsions may be used at ambient temperatures with aggregates, which need not be completely dry. Emulsions are less hazardous to use in comparing with the cutback and can be applied in a wider range of conditions. Most CMS 2 applications are listed below:
Bitumen chip (Chip seal)
Bitumen seal (Seal coat)
Also, ideally suited and designed for
Pot hole filling/patch work
Premix carpet work
Strong bonding with existing surface
High stability of patches
Successful performance of asphalt emulsions requires selecting the proper type and grade for the intended use. Guidelines presented in this chapter should help select the specific grade and type of emulsion to be used.
The first consideration in picking the right type and grade of the emulsion is how the emulsion will be used. Is it for a planned mix (central or mixed-in-place), a recycled mix, or a prime coat application? Is it for some type of surface application, such as a fog seal, slurry seal, micro surfacing, or chip seal? Is it for a maintenance mix? Once this decision is made, other project variables must then be considered. Some other factors that affect the selection are:
Climatic conditions anticipated during construction. The choice of emulsion grade, the design of mix or treatment, and the selection of construction equipment should be dictated by the conditions at the time of construction.
• Aggregate type, gradation, and availability.
• Contractor or construction equipment availability.
• Geographical location. The hauling distance and, in some cases, water availability are important considerations.
• Traffic control. Can traffic be detoured or only controlled through the work area?
• Environmental considerations.
• Proper application for pavement preservation or pavement distresses.
• Traffic type and volume.
While general guidelines can be given for selecting emulsions, laboratory testing is strongly recommended. There is no substitute for a laboratory evaluation of the emulsion and the aggregate to be used. Different types and quantities of emulsion should be tried with the aggregate to find the best combination for the intended use. An experienced technician can determine the type and grade of the emulsion to be used.
Cationic emulsions are preferred for use with negatively charged siliceous aggregates such as quartz, granite, sandstone and river gravel. In general, Cationic emulsions can be used with a wider range of aggregates, will tolerate greater quantities of moisture, and will break at a lower ambient temperature. The main application areas of Emulsion bitumen are surface dressing, tack coats, prime coat, slurry seal, and cold mixing.
Advantage of using asphalt emulsion CMS-2h
No petroleum solvent required to liquefy
• Little or no hydrocarbon emissions
• In most cases, used with no additional heat. It does not need any pre-heating. Thus results in the case of handling for the user, besides saving in cost.
• The ability to coat damp aggregate. It can be used even with wet aggregates thus enabling users to carry out work during the monsoon also.
• Can use cold materials at remote sites. Cold application of Bitumen Emulsion ensures safety to the workforce; it is a user-friendly product. Being cold applied the work progresses much faster.
• Wide variety of emulsion types available today
• Economical
• Free from danger ( for fire )
• Environmental
• Harmless for worker health.
• It can use with moisture aggregates. It can be used even with wet aggregates thus enabling users to carry out work during the monsoon also.
• Application temperature is low and does not need heating while storage and transportation period. For this reason, it provides energy saving.
• Emulgators increase adhesion they effect as anti-stripping agent
• It can use in four seasons. Especially it gives a chance application in the rainy region and it extends application period.
• It has a lot of application area and construction methods.
• Bitumen Emulsion does not require petroleum solvent to make them liquid as in cutback and also it is not required to be heated like normal Bitumen. Thus saving imported petroleum oil or firewood.
• Toxic fumes (Hydrocarbon emission) normally emitted from heated bitumen & cutbacks not present when Cationic Bitumen Emulsion is used, as no heating is required for its application.
Packing of asphalt emulsion CMS-2h
Availability
BS group asphalt emulsion CMS-2h is available in:
Bulk
IBC Tank, Flexi Tank
Reconditioned steel drums 220 lit., Net Weight: 200 ± 3 Kg
New steel drums 220 lit., Net Weight: 200 ± 3 Kg
Delivery
The Delivery can be done in all terms like: FOB, CFR and CIF
