Condition
Interconnecting cracks that visually resemble the pattern on an alligator hide, hence the term "alligatoring." These cracks begin at the bottom of the layer of asphalt and due to the flexing action of asphalt over an unstable base, these cracks progress through the thickness of the asphalt layers. By the time they are visible on the surface, the pavement has failed. These failures are typically more prevalent in high traffic areas or near dumpster enclosures.
Cause
A failure of the base material causing it to become soft. This causes the asphalt to flex and crack. When the asphalt begins to crack it allows in additional moisture that softens the base material surrounding the original cracking, causing "alligatoring." It is also possible that the existing pavement section is too thin to withstand the type of traffic that it encounters.
Correction
In the areas of the pavement surface where failure is showing (areas of "alligatoring") we may propose removal of the failed asphalt and replacement with a thicker cross-section of newly placed and compacted asphalt. This repair process is commonly referred to as R&R or patching. It is recommended that the new "patch" be placed at a minimum thickness of 11/2 times the original asphalt depth to bridge any inherent weakness in the base material in that area. Calvac Paving will mill, saw cut or jackhammer the perimeter of the failed areas. At the edges of the patches, it is necessary to remove a minimum of 12" of asphalt surrounding the visible cracks. This allows us to tie into solid asphalt for a more durable patch. All excavated spoils are then hauled to a legal dumpsite (Calvac Paving makes a conscious effort to recycle all spoils). The existing base material is then re-graded and compacted to a 95% relative density. An asphalt emulsion tack oil is applied to all vertical edges of the existing asphalt and we will then pave the patch with the specified thickness of hot-mix asphalt, placed and compacted in lifts no greater than 3" to achieve optimum compaction. After we finish the rolling of the new asphalt it is then fog sealed.
Here at Calvac we can provide you with all your concrete needs.
Below is a partial list of the services and products that we can deliver to your properties.
We specialize in the installation of complete ADA systems for your property. Design and installation of Ramps, Sidewalks, Signage, Railing, Stall leveling, Striping...
All Public Work projects on your property.
Concrete Hardscape: Sidewalks, Curbs, Curb & Gutter, Planter Islands, Medians, Patios, Fountains, Garbage Enclosures, Equipment Yards and more.
- All types of finishes
- Colored/Stamped Concrete
- Pavers
- Concrete Resurfacing
- Stone, Brick and Tile
- Turf Blocks
- Concrete Overlays and Stains
- Retaining Walls
- CMU Blocks
Condition
If your surface is rough, oxidized (faded to grey) or suffering intermittent cracking it is likely that sealcoat is the correct application to improve and extend the life of your asphalt surface. Sealcoat should only be applied to asphalt surfaces that have maintained their integrity. It will not correct failures nor improve grade and drainage issues. If there are structural or design problems with your asphalt surface, we can correct these issues and follow with a sealcoat to protect the existing and new pavement as well as provide you with a uniform appearance. Sealcoat provides a new driving/wear surface to protect the large investment you have made in your asphalt. In Multi-Residential and Retail we often find excessive "oil spots" in the parking stalls and while sealcoat does not cure this problem it will improve the appearance and provide limited protection.
Cause
Age, UV exposure, traffic and water intrusion are the typical factors that cause your asphalt surface to require Sealcoat. Cracking is also an issue with asphalt surfaces and if you choose to Crackfill your property it is likely that the entire asphalt surface should be seal coated to retard the appearance of additional cracking.
The choice of a Sealcoat is often made in High Profile and Retail Properties for aesthetic reasons, i.e., curb appeal.
Correction
Preparation of the existing asphalt surface is a very important process in seal coating your parking lot. Calvac Paving will spend the time necessary to clean and prepare your asphalt to assure a durable and attractive product. We will remove all vegetation, and apply herbicide if appropriate. We will use Power blowers, scrapers, wire brushes and brooms to thoroughly clean the existing asphalt. This preparation may also include Mobile Sweepers, water trucks or buggies and vacuum trucks. We will burn, scrape and carefully clean the oil spots and apply an oil spot sealer with sand. We will mask utility covers and other structures to protect against coverage. We will apply hot rubberized or cold pour emulsion crack filler as directed.
The consistency of the asphalt sealer is also very important to the durability of your sealcoat project. The addition of water is necessary for the application and actually improves the bonding of sealcoat to the existing asphalt surface. Calvac Paving will never exceed the manufacturer's recommendations for dilution. Our 35 years of experience has shown us that the addition of latex and sand to the asphalt sealer extends the life of the sealer, and we include these admixtures in over 90% of our sealcoat projects.
The combination of organized phasing, timely notification, effective barricading and traffic control with superior craftsmanship and products will provide you with the best result with the least impact upon you and your tenants.
Condition
Existing ADA stalls and signage are not current and do not meet Title III. Some of the common factors that expose these deficiencies are an ownership change of the building or the filing of a complaint or lawsuit by any individual. A usage change of the building or a tenant improvement will also trigger the need to correct these deficiencies prior to final permit approval.
Cause
Under Title III of the ADA, all "new construction" (construction, modification or alterations) after the effective date of the ADA (July of 1992) must be fully compliant with the Americans With Disabilities Act Accessibility Guidelines ("ADAAG") found in the Code of Federal Regulations at 28 C.F.R., Part 36, Appendix "A." Very Important is the fact that Title III also has application to already existing facilities.
Correction
It is advisable to refer all ADA design questions to an ADA specialist. It is not uncommon for plans approved by the City for construction to be incorrect in relation to the ADA requirements. If built to match the plans these areas will likely not pass final inspection.
The design will produce the correct number of ADA stalls, with the correct ratio of Van Accessible stalls, and provide paths of travel that meet all of the requirements for steepness, width, depth and surface markings.
Condition
Faded stripes and traffic markings that confuse or mislead your customers or tenants. "Ghost lines" that are showing through the seal coated surface adding to the confusion. Faded or chipping painted curbs. Additional stencils or traffic markings may become necessary as usage of a property evolves or changes.
Cause
Age, UV exposure, traffic and water abrasion are the typical factors that cause your striping and painted curbs to fade or wear.
The "Ghost" effect is caused by the wearing off of the seal coated surface which exposes any previous striping layouts.
Correction
If your striping or painted curbs are simply faded then the correction is to restripe over the existing layout. This work can be done weekdays or weekends to accommodate your tenants.
If you are experiencing "Ghost lines" and/or you would like to change your layout it is possible to black out the existing lines and paint the proposed layout. This process is typically not preferable to applying sealcoat to the entire surface followed by the restriping of the lot as you will be left with a lot full of blacker lines and markings which can negatively impact the aesthetics and cause some confusion in wet conditions.
We can also relocate or furnish and install any signage associated with parking to meet the current or proposed layout.
Condition
Intermittent linear cracking and/or a worn and ravelled asphalt surface. Aged and oxidized asphalt, rough and rocky with a light gray appearance. Minor alligatored areas (interconnecting cracks) with little or no subsidence of the asphalt surface. These failures are typically wide spread throughout the property but not severe and any locations and often caused by the advanced age and oxidization of the asphalt surface.
Cause
A less than satisfactory base on top of moisture sensitive subgrade causes swell and shrinkage in that subgrade, which reflects through the base material and then up through asphalt until the cracks become visible on the surface. The infiltration of moisture through these cracks and oxidized (dried out) asphalt accelerates the damage.
It is also possible that the existing aggregate base and pavement section is too thin to withstand the type of traffic that it encounters.
Correction
A Petromat Overlay is the application of a liquid asphalt binder and paving of a 1 1/2"- 3" layer of asphalt over the entire asphalt surface. The addition of "Petromat" paving fabric impregnated with liquid asphalt creates a barrier between the layers of asphalt that retards reflective cracking and water intrusion. This fabric is a nonwoven fabric that helps to dissipate the stresses on your existing asphalt surface and bridge existing weaker areas.
Calvac Paving will excavate or grind the existing asphalt surface at all necessary transitions to allow for full depth asphalt placement in these vital areas. We will then clean the entire surface of the proposed overlay to ensure a complete bond. Apply liquid asphalt binder at a rate of .25-.30 gallons per square yard immediately followed by installation of the "Petromat" pavement reinforcing fabric. The fabric will be installed according to manufacturer's specifications; which includes an overlap of 3"-6" at each joint and removal of all necessary wrinkles in the fabric.
Condition
Existing dirt lots or roadways that need to be prepared for the installation of a new asphalt or concrete surface. Poorly graded areas that need to improve the drainage prior to the installation of sub-grade drainage systems.
Cause
Lack of engineering at time of original construction.
Correction
Design a new roadway or parking lot to meet the needs of the client. Engineer a drainage system to correct the moisture problems and create the proposed asphalt or concrete surface to accommodate the proposed usage of the area.
Condition
Linear cracking in your asphalt surface. Aged and oxidized asphalt that has intermittent cracking. These cracks are typically wide spread throughout the property and not concentrated in one area nor interlocking. If there are alligatored areas (interconnecting cracks) then these areas should be repaired rather than crack filled. These problems are exacerbated by the intrusion of water which will penetrate to the subgrade and accelerate cracking caused by shrink/swell of the subgrade.
Cause
Causes of this linear cracking could be a less than satisfactory base course on top of a moisture sensitive subgrade causing swell and shrinkage in that subgrade. This movement reflects through the base course and the up through asphalt surface. The infiltration of moisture through this cracked and oxidized (dried out) asphalt accelerates the damage. Additional causes would be ground slippage, expansion and contraction due to heat and cold cycles, shrink/swell of the subgrade, the advanced age and oxidization of the asphalt surface.
Correction
Cracks that are 1/4" -3/8" can be filled with a cold pour asphalt emulsion crackfiller. Cracks that are 3/8" - 3/4" will require the use of a hot rubberized crackfiller. Cracks larger than 3/4" should be corrected with hotmix asphalt, by either filling the cracks with hotmix asphalt and covering with hot pour crackfiller or Petromat overlaying the entire area.
With either application the cracks will have the existing vegetation removed and then the crack will be blown out with high pressure air and high heat. If necessary we can apply a spray sterilant to the existing vegetation prior to removal.
If we apply cold pour crackfiller, then that material is poured into the crack to bridge the opening and create a flexible filler that is then struck with a specialized squeegee to force the material deeper into the crack and to localize the coverage of the material into a thin strip at each side of the crack.If the cracks require hot rubberized crackfiller, then that material is heated to 350°+ and the material is forced into the crack and struck flush with the surface.
Condition
Existing dirt lots or roadways that need to be prepared for the installation of a new asphalt or concrete surface. Poorly graded areas that need to improve the drainage prior to the installation of sub-grade drainage systems.
Cause
Lack of engineering at time of original construction.
Correction
Design a new roadway or parking lot to meet the needs of the client. Engineer a drainage system to correct the moisture problems and create the proposed asphalt or concrete surface to accomodate the proposed usage of the area.
Condition
A significant percentage of the surface suffers with interconnecting cracks that visually resemble the pattern on an alligator hide, hence the term "alligatoring." These cracks begin at the bottom of the layer of asphalt and due to the flexing action of asphalt over an unstable base; the cracks have progressed through the thickness of the asphalt layers until they have become visible. By the time they are visible on the surface, the pavement has failed. These failures are typically more prevalent in high traffic areas or near dumpster enclosures.
Cause
A failure of the base material causing it to become soft. This causes the asphalt to flex and crack. When the asphalt begins to crack it allows in additional moisture that softens the base material surrounding the original cracking, causing "alligatoring." It is likely under these conditions that the existing pavement section is insufficient to withstand the type of traffic that it encounters.
Correction
This process encompasses entire asphalt areas rather than performing select repairs throughout the property. The entire asphalt surface, and any existing baserock, is pulverized in place to a depth of 6" or greater. The existing asphalt around the perimeters of the pulverized areas will likely need to be hauled away to accommodate the grade transitions to the existing surfaces. All excavated spoils are then hauled to a legal dumpsite (Calvac Paving makes a conscious effort to recycle all spoils, if at all possible.) The existing pulverized base material is then regraded and recompacted to a minimum of 95% relative density. An asphalt emulsion tack oil is applied to all vertical edges of the existing asphalt and we will then pave the patch with the specified thickness of hotmix asphalt, placed and compacted in lifts no greater than 3" to achieve optimum compaction. After we finish the rolling of the new asphalt it is then fog sealed.