Apart from the literal meaning of the gerund, asphalt pumping is a phenomenon when groundwater starts to seep through porous or jointed asphalt and onto the pavement in dark, moist patches. The water exuded from the pavement may also carry fine soil particles with it as heavy vehicular loads ‘squeeze’ the pavement.
Pavement failure is a significant reason why pavement needs to be installed over sufficiently tested soils with lower water tables. Appropriate drainage is also integral to pavement design to ensure surface runoff does not pool around the subgrade.
What Causes Water Pumped Asphalt?
Porous asphalt is regarded as an innovation in well-drained pavement solutions, but several factors come into play to make this self-draining asphalt work the other way round. When the asphalt is improperly prepared during the design phase, inadequately compacted after installation, and the pavement itself passing over a region of heavy clay soils & high-water tables, pumped asphalt occurs. Inadequate compaction means heavy vehicles compress the pavement, forcing the waterlogged sub-courses to exude water to the surface.
When professional contractors like CAM Service & Repairs in Jacksonville, FL, install your pavement, they ensure that such issues are prevented.
What Happens To Asphalt?
We are familiar with the effects of water on asphalt, so it comes as no surprise that the pavement deteriorates faster than conventional water intrusive weathering. You can expect water bleeding potholes and potential sinkholes in no time. Edge cracks, block cracks, and damage to the jointed pavement are expected. If the pavement is porous and rigid (like concrete), spalling and freeze-thaw damage will crumble the pavement away.
How to Deal With the Issue?
The pumped pavement calls for immediate inspection to determine the root cause. If drainage is the issue, the subgrade course should be retrofitted with suitable drainage. And if the porous nature of the asphalt design mix is the cause, then one can apply a fog seal (hot emulsion) to permeate, protect, and rejuvenate the porous asphalt from water intrusion. Then seal with a slurry coat to fill in surface cracks & imperfections and form a suitable wearing course.
Further Implications of Pumping
Water saturated subgrade in the slabbed pavement can cause material movement in the lower pavement layers, leading to slippage and faulting. This is evident in rigid pavement and results in exposed joints, making the pavement more vulnerable to water intrusion. Further damages are along the lines of corner breaking & linear cracks.
Whatever the issue may be, if you notice pavement that seems to be exuding water over some time, it’s time to call in the experts at CAM Service & Repairs.
Schedule Your Repairs with Your Local Paving Experts
Whether it be potholes, cracks, worn pavement, or a weird ‘fountain of ooze’ on your pavement, CAM Service & Repairs are the professionals you contact in such events. We are active across locations in Florida. If you happen to be a resident of Jacksonville, please do reach out to us!