HOT BITUMEN SEALS
Bitumen seals can be done in a range of different products from Hot Bitumen, Rubberised Bitumen, Primary Seals and
A lower grade product called Emulsion which is a water based product.
Hot bitumen spray seal is the mostly commonly used product on road surfaces throughout Australia. Hot bitumen is made in a controlled bitumen plant environment and is classified as a dangerous goods product. Hot Bitumen is sprayed at a temperature of 180 degrees.
Two coat HOT bitumen seals are applied on in two applications.
The first application of bitumen is sprayed over a prepared base then covered with precoated aggregate using specially design Auto spreader trucks. The surface is then rolled with a multi tyre roller to push the aggregate into the bitumen.
The second application is performed the same way, although a different size aggregate maybe used on the second/top layer. We use two coat bitumen seals most commonly on new construction driveways. For existing bitumen driveways we can also do a one or two coat reseal over the existing area to provide a longer life of your bitumen driveway.
Rubberised bitumen is also a hot bitumen product that is sprayed at a temperature from 180-200 degrees. Rubberised bitumen can be used on reseals; this product is great to use where there is slight ground movement as it has a little more flexibility to it.
Primary seals are applied to the prepared road base surface. Primary seal is a mixture of hot bitumen and kerosene and is applied to assist in sealing off moisture from entering the prepared road base. Primary seals can be applied under both bitumen seal and Asphalt.
Emulsion is a water based bitumen product. Typically, emulsion is 60% bitumen and 40% water. This product is lower quality product and used mostly as a tack coat under Asphalt to bind the Asphalt to the prepared base. Emulsion can be used effectively as a spray seal ONLY if applied by a professional bitumen operator using the correct spray rates and techniques. Due to the water content in Emulsion it is not suitable for hilly areas.
As Emulsion has a very high water content it needs to be applied at twice the spray rate of hot bitumen. Emulsion is sprayed cold and is widely used by Dodgy bitumen operators as it can be sprayed out of a plastic tank and stored in plastic tanks without needing to be heated. Most of these operators are just in for a quick buck and rely on the public not knowing the difference between the quality and poor quality bitumen products.
Dodgy operators will approach homes and business with the catch phrases of:
* We have left over bitumen.
* We are working for the council up the road and have left over product.
*We have a hole in our tank and need to get the product out.
Letterbox drops with:
* We are only in the area for this month.
* Special price, this month only.
Etc, Etc, Etc
When quizzed about the products used the dodgy operators usually have no idea of product names and will just make up something. Most people will be told by dodgy operators it is hot bitumen when asked and when the client sees it’s black
Stuff they think it must be.
When emulsion product is being used, when first applied it will be a brown colour and not a shiny black colour like hot bitumen. Emulsion needs time to "go off" before aggregate is to be applied so the product will stick.
DONT BE AFRAID TO ASK THEM LOTS OF QUESTIONS ABOUT THEIR KNOWLEDGE OF BITUMEN.
To our knowledge, NO RESPECTABLE, REPUTABLE bitumen business will do cold calls offering cheap bitumen.
Call Mark on:
0400 791 527