Bitumen wax blended
Bitumen wax blended is combination of bitumen and wax.Wax working as additive of fuel resistance for bitumen. Warm mix asphalt (WMA) utilizes a broad range of processes and a number of additives, some of which are proprietary, that allow production of asphalt mix at significantly lower temperature than hot mix asphalt (HMA). The lower production temperatures substantially reduce asphalt fumes and plant emissions, and burner fuel requirements.
It is a long-chain aliphatic hydrocarbon with a melting point of about 100ºC and is completely soluble in asphalt above 140ºC at typical dosage concentrations. At temperatures above the melting point it acts as a flow improver by reducing the viscosity of the asphalt and enabling mixing and compaction temperatures to be reduced by 10 to 30ºC.
All waxes include petroleum waxes and synthetic waxes, and in particular, ones having a softening point or melting point of above 50°C, preferably, from 60 to 150°C, and more preferably, from 60 to 120°C and are generally obtained from crude oil and/or crude oil is suitable to use. Paraffin waxes are macrocrystalline products, which are usually solid at room temperature (25°C). and Microcrystalline waxes also tend to be solids at room temperature is giving high quality to the mixture.
Alternatively, the bitumen produced by solvent de-asphalting, or blowing air through, for example, vacuum residues. The latter method involves blowing air through, for example, topped asphaltic crude or soft grade bitumen. This process may optionally be carried out in the presence of a catalyst, to produce catalytically oxidised bitumen. It means all type and grade of bitumen is Ok to use this additive.
The bitumen blended wax using any suitable method. For instance, the wax added in divided granular form to the bitumen. The bitumen wax blended in the molten state, which is at a temperature sufficient to dissolve or disperse the wax. Suitable temperatures range between 120 and 200°C, preferably, 160 and 180°C.
Application of bitumen wax blended
Bitumen wax blended produced as described above employed as a binder for bituminous compositions with aggregates. The aggregates employed in such compositions include conventional aggregates such as granite. Optionally, fillers of, for example, limestone and cellulose included in the bituminous composition.
How to use bitumen wax blended
When the bitumen wax blended is employed as a binder for a bituminous composition with aggregates, the bitumen wax blended may form 1 to 20 wt %, preferably, 2 to 15 wt %, more preferably, 5 to 10 wt %, and most preferably, 6 to 8 wt % of the overall composition. The aggregate content of the overall composition may be more than 50 wt %, preferably, more than 60 wt %, even more preferably, more than 70 wt %, for example, 75 to 90 wt %. The remainder of the composition may comprise sand, cellulose and/or limestone.