Why should we use the rubber tyred roller in the construction of the asphalt pavement?
Initial pressure is generally used by steel wheel rollers, but there will be a phenomenon of passing, that is, the front of the roller mixture is subjected to lateral movement of pressure, and may cause cracks after compaction. Also useful for the initial pressure of the rubber wheel, but because the initial temperature is higher, the mixture easily adhere to the tire, and the traces are not easy to remove, so there is a lot of opportunities for the rubber wheel to re pressure.I think there are two main advantages of rubber wheels:1., rubber wheel compaction is a kind of kneading type compaction, compaction effect is good, and can remove the steel wheel compaction generated small cracks;2., the rubber wheel compaction will make the mixture of asphalt, mineral powder, fine aggregate and other forms of adhesive floating, so that the upper surface more closely, waterproof better.The disadvantage or non applicability of a rubber tyred roller:
At present, the latter two are widely used in construction.The following is a steel wheel roller, which is in front of the paver. The following table shows two rubber tyred rollers. Roller's purpose: 1. to achieve the required density (usually controlled by compaction); 2. press out the smooth surface.General compaction includes initial pressure, re pressure and final pressure. The final pressure is to remove the traces of rollers, the road is kept smooth, generally can not be omitted, and the use of steel wheel roller. If the initial pressure can meet the density requirements, there is no need to re pressure, but generally still maintain these three steps.
Look, the problem has been vacant for so long. Let me answer it.My answer to this question is limited to asphalt pavement construction. Hot mix asphalt is a mixture of heated stones, aggregates and heated liquid asphalt, mixed with fillers (such as ground mineral powder) and additional additives (fibers, etc.) at mixing stations. Take the truck to the construction site when it is hot, then pave and compaction.The asphalt mixture must be kept at a higher temperature during compaction, in order to ensure a certain density (compactness) after compaction.There are three types of rollers I know: steel wheel rollers, rubber tyred rollers and vibratory steel roller.
