Tarmac is a substance used in paving roads and pathways; it is a mixture of tar and gravel and is also known as tar macadam. Tarmac is often used because it is a cheaper alternative to other road paving materials and yet, has a long lasting effect. However, from time to time driveways paved with tarmac get damaged and require repairs.
Sources of Tarmac Damage
One substance responsible for the damage of a tarmac paved driveway is automotive oil such as petrol or diesel. When any of these leak onto the driveway, the tarmac begins to dissolve. This is because tarmac is oil based and these automotive oils, including turpentine can be used for thinning it out. Moreover, constant exposure to moisture and sunlight, if adequate protection of the tarmac was not carried out, can cause wear and tear and subsequent damage of the tarmac. This is because tarmac is a substance that is susceptible to ultraviolet rays.
In situations where a driveway laid with tarmac has suffered some damage or the other, it is possible to repair the tarmac. For tarmac repair, it is essential to have what is known as cold pour handy. A form of tarmac known as repair macadam will also be necessary. The repair of tarmac will require some level of skill as the use of machinery will be involved. The following steps present a quick guide to tarmac repair:
- The first step to take would be to cut out the damaged area. This can be done with a power saw, a grinder or any suitable tool. The cutting should not just be limited to the affected area but any area which might have been contaminated by automotive oil for instance, should also be cut away. Cutting should be done in a neat fashion.
- After cutting out the damaged area, it should be dug out completely to the foundation and the debris thrown away.
- Next, fill the excavated hole with cold pour.
- The tarmac for repair should then be poured on top of the cold pour and pressed down with a roller after which another layer of the repair tarmac should be poured on top of the pressed down layer.
- More of the cold pour should be poured on top of the repair macadam to be used in sealing the repaired hole.
If you have a damaged bit of tarmac on your driveway, it is possible to repair that bit making use of the above steps. It is essential that the damaged bit is dug out and the hole refilled for a longer lasting repair; merely putting cold pour on top of the damage will not repair the tarmac and would only be counterproductive. To prevent moisture from seeping into the repaired tarmac however, cold pour is necessary because it serves as a sealant, preventing water seepage.Although tarmac repair could probably be a do-it-yourself project, it is recommended that the services of an expert be sought so as to avoid mistakes and avoidable risks.