Bitumen roofing bitumen hot - composition characteristic
Bitumen solutions are important in the production technology. If the basis is the use( selected in each case) of the compositions of the solvents, then we are talking about cold solutions. As solvents can be applied gasolines, kerosene, technical alcohols, etc. Cold compositions have better fluidity and penetrating power. In addition, they very quickly freeze.
For hot solutions, the technology of obtaining by heating in various ways( in the flame of a burner, heating in a vat, etc.) is typical. An example of hot solutions can be a roofing mastic. Its main purpose is to glue flexible roofing materials on the basis of the same bitumen, to create a waterproofing coating on structural elements.
The composition requires heating up to a temperature of about one hundred and eighty degrees. The warmed up composition is spread or applied in some other way to the substrate. High adhesiveness and flowability in the heated state provide strong adhesion and good protection of the application surface.
The obvious disadvantage of working with hot mastic will be the need for additional equipment for its heating. The complexity of the work increases in the open air in conditions of low temperatures.
In this case, low base temperature does not provide high quality adhesion of mortar and roofing materials, or the formation of a reliable layer of waterproofing.
Cold mastic - unpretentious replacement for construction
Unlike hot, mastic bituminous roofing cold is prepared, like all cold solutions, using a variety of solvents. It can be used to perform work without the need for additional warm-up, in "field" conditions, for example, on a construction site even in winter.
The whole point is what kind of solvent will be chosen for its preparation. As it becomes clear, the preparation of cold mastic is possible using gasoline, kerosene or other solvents. In practice, the most commonly used oil is a solar oil.
It is heated during the preparation of the composition and injected into the melt of bitumen together with fillers( more often lime and asbestos).The composition thus obtained can be used in ongoing work or stored in a closed container( mandatory condition).
Compare the hot and cold option - which is better?
As a test of the properties of the obtained cold bituminous composition of mastic, gluing of two layers of a common roofing material is used. The check is carried out only a day after gluing. In addition to the adhesive ability, cold mastic should not degrade the properties of bending and elasticity. When applied to the substrate, it should form a uniform layer, with heat resistance not worse than that of hot mastic.
All cold mastics can have variable characteristics, the bituminous bituminous bituminous mastic here serves as a reference point. It is in comparison with her that the manufacturer experimentes with the recipe, receives properties that are not characteristic of the cold state, and strives to make convenient but undemanding material.
It should be taken into account that with decreasing temperature, oil has a tendency to thicken. This can have a negative impact on these characteristics. But, in general, cold mastics are more convenient to use. With their help, it is easier to glue a soft roof in the form of rolls, apply a waterproofing protective layer, arrange a vapor barrier, etc.
When using mastic, the application is carried out on pre-cleaned dry surfaces. It is not recommended to use them independently as coatings for electrical insulating or anticorrosive coatings, etc.
