What Is Crack Sealing?
Specialized Materials Are Placed Into Or Above Cracks To Prevent The Intrusion Of Water And Incompressible materials Into The Cracks And To Reinforce The Adjacent Pavement. Sealing and filling asphalt pavement cracks is a common Asphalt maintenance Practice. The foreign non-compressible materials will not expand and contract with changing temperatures like the asphalt does and therefore will cause cracking in the asphalt surface. Keeping foreign materials and water out will reduce erosion and damages due to freezing and thawing as well as extending the life and quality of your pavement.
The key here is crack sealing your pavement when cracks first appear, you keep water and non-compressible materials out of the cracks. Cracks come in all shapes and sizes. Sealing themas quickly as possible is one of the most effective ways to maintain the quality and longevity of your pavement.
One of the biggest mistakes most people make is waiting too long to begin maintenance.
Benefits Of Crack Sealing
Will crack Sealing my asphalt help?
Yes! crack sealing is a preventative seal that extends the life of asphalt pavements. Filling and sealing cracks in the surface of your pavement keeping it More structurally sound and extending longevity.
Will crack sealing make my pavement look better?
Absolutely! The Sealant will not only protect but enhance your driveway to like new condition. As well as making it much easier for you to sweep and clean your asphalt surface.
What else does crack sealing do?
crack sealing will also keep Water and foreign materials out preventing further damages due to cracking and erosion to your pavement.
Step 1 - Preparation
we begin by evaluating the current condition of your current asphalt surface and foundations
*Site preparation requirements vary according to the sealing or filling method and materials chosen for the project.*
Step 2 - Routing or Sawing
*When routing or sawing is incorporated, cracks need to be cleaned and dried prior to application of the filler or sealant.*
When pavements are cracked extensively, routing or sawing of cracks may not be appropriate. Crack cutting becomes especially important in climates where crack movement is very high. Crack cutting allows more filler to be used and provides better control of the crack channel shape. Secondary cracks along the primary crack are not usually routed
Step 3 - Cleaning
Debris left in a crack, resulting from sawing, routing, or pavement use will affect the adhesion of the sealant or filler. Debris also contaminates the sealing or filling material and reduces cohesion. Reduced adhesion or cohesion normally results in early failures.
To avoid these contamination-related failures, sawed or routed cracks must be cleaned prior to being treated. Several cleaning methods can be used
*Air blasting involves directing a concentrated stream of air into the crack or joint to blow it clean.*
*Hot air blasting is done using a hot compressed air heat lance.*
*Sand blasting involves directing a stream of sand entrained in compressed air into the crack.*
*Wire brushing or brooming involves the use of a wire broom stock or stiff standard broom to brush out the crack or joint.*
Step 4 - Application
*The Material Selected Will In Part, Determine The Application Method.*
Typically, asphalt emulsions are applied directly to the cracks. Hot applied rubber modified sealants, especially asphalt rubber, have excellent adhesion and do not require the application of a thin sand coating (blotter coat) prior to trafficking.
Emulsions must be blotter coated prior to being trafficked. Emulsions may be applied via gravity feed devices, such as pour pots, or via pressure hoses. Some emulsions may require heating to achieve appropriate application viscosity.
Hot applied rubberized sealants need to be agitated and heated and maintained at the correct temperature throughout their application.
For polymer and rubber modified materials, control of temperature is important in preventing degradation.
For hot applied fiber filled materials, the fiber may settle; therefore, agitation is required. For such materials indirect oil heating is recommended
Step 5 - Finishing
Finishing the job involves cleaning of entire area of Job-site to leave it looking neat and polished.
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