Category: Uncategorized

Should I remove my existing surface before tarring?

Things to Consider before Resurfacing

yt

When your surface start to lose their luster or are nearing the end of their lifespan, many consider the option of having their surfaces resurfaced to cut costs , with ought removing the existing surface. There are some cases when a good resurfacing job will do the trick. But in some other cases, you’ll have no choice but to have the whole surface redone. So, how do you know when it’s better to replace or resurface your surface?

How Resurfacing Works

Before you make your decision, you have to first understand how  resurfacing works to know if it’s right for your driveway / parking / road. When a contractor comes over to resurface your , they will remove the top layer first, which will be replaced by a fresh new one. If your asphalt pavement foundation is still in good condition, you could delay replacement for a good number of years with resurfacing. However, this is all dependent on whether you’re working with a good contractor.

Divots, potholes, and cracks will need to be fixed before resurfacing. Your new asphalt surface will only be as good as the asphalt below and working on a poor surface will eventually show up on the surface.

Asphalt Replacement

df

In case the damage on your surface has reached the point of no return, most contractors will advise that you have the asphalt replaced. Even if resurfacing may seem like an affordable quick fix for now, constantly resurfacing will eventually cost much more than having the whole thing replaced. If your driveway is nearing 20-years-old, you should also consider replacement since it has probably already exceeded its lifespan.

What is the Best Option for Me?

It really all depends on the level of damage the driveway has sustained. If less than 30% of the asphalt needs repair, then you might be able to get away with resurfacing. The foundation also has to be in great condition in order for resurfacing to work long term. If there are any cracks, you should make sure that they are shallow and no wider than a quarter inch. Pavements that are under 20-years-old and have all those characteristics will usually be able to be fixed with a resurfacing job.

On the other hand, if more than a third of your driveway is in dire need of repairs, then replacement is usually a sounder choice. This is also the case if the foundation is unstable. If there are many large cracks and deep potholes, resurfacing usually won’t be enough either. Don’t cut corners and try to buy time by resurfacing and patching. Having the asphalt replaced now will allow you to have peace of mind for decades if you take care of it carefully, so take that into consideration before making any choice.

Conclusion

Your driveway is an important investment and one of the first things people notice when they get to your house. Make sure that you make a sound decision that will not only fix immediate problems but reduce costs in the long run.

Laying Asphalt the right way

How to Lay Asphalt Driveway / Road Correctly

Learn how the pros make asphalt driveways that last

Pavestar Team www.pavestar.co.za 

By the Pavestar Team 

What makes an asphalt driveway durable?

randvaal asphalt / tar surfacing company

1: Thick, well-compacted g 5 base

The first step is finding a reputable contractor to do the job. The residential asphalt industry has more than its share of fly-by-nights. The only advice I can offer is to find one with references from homeowners who are still satisfied with their driveways or parking lots. After a decade or so. Assuming you find a good contractor, the rest should take care of itself.

The materials and techniques described here for a quality surface are pretty simple. Discuss them with your potential contractor before signing on the dotted line, and  keep an eye on the actual installation to make sure you’re getting what you paid for.

The secrets of a long-lasting drivewayj

One of the main design objectives for a durable asphalt driveway or parking lot is to provide enough slope for draining water off and away from the driveway. Water should never pond on the surface or next to the driveway where it will seep underneath to weaken the soil or cause frost heaving.

The main component of a long-lasting driveway is the underlying granular base. It must have the right thickness and composition. Base materials vary by and can be crushed stone or “conbit” (recycled concrete and asphalt—it’s crushed and reused). Crushed coarse materials like these have jagged surfaces so they’ll compact and lock together in a tough, settle-resistant matrix. A binder like cement dust may be added to hold it all together. Coarse materials also drain water from under the driveway so ice won’t form and crack the asphalt surface.

Once your old driveway has been torn out, you and the contractor should closely examine the existing base (the fill under the asphalt surface) and possibly remove or add material. Digging into the exposed base will tell you its type and thickness. Recommended thicknesses are 8 in. of base over clay soils or 4 in. over well-drained sandy soils. If your base is inadequate, it must be upgraded. Low bids may signal that a contractor isn’t prepared to install a good base. Ask the contractor about these details before you sign up.

Mechanical compaction of the base, subbase and asphalt is crucial for a long-lasting driveway. Ideally, the base should sit for about a week so that natural settling will augment the mechanical compaction. When compacting subbases, contractors will use heavy rollers (or even the tires of the earth-moving equipment) for large areas and plate compactors for smaller areas. But when rolling out asphalt, heavy compacting equipment is needed. Select a contractor who has 1- to 3-ton rollers for compacting the asphalt itself. Edges are raked and formed to 45-degree angles, then packed with a hand tamper.

In most areas, there are two options for the asphalt itself. The difference is the size of the aggregate (gravel filler) used. The most common mix for residential driveways has finer (1/2 in. or smaller) aggregate and thus forms a smoother surface. Coarser (3/4 in. or smaller) aggregate mixes are stronger but have a rougher finish. Parking lots and roads are usually a coarser mix. Coarser mixes are also recommended for driveways that get heavier traffic such as RVs, large trucks and tractors. Both mixes cost about the same.

In most parts of the country, the asphalt laid over a properly prepared aggregate base should be 2 to 3 in. thick. If you opt for a 3-in. thick surface, you can use the coarse asphalt mix for a 2-in. thick bottom layer for strength, and a 1-in. thick layer of the finer mix on the surface for a better appearance.

Required Materials for this asphalt driveway paving project

Avoid last-minute shopping trips by having all your materials ready ahead of time. Here’s a list.

  • Aggregate base
  • Asphalt

We want Engineers

Africa needs busy engineers not just busy lawyers

0 By Evans Mumba on November 18, 2019 Construction, Infrastructure, News Want create site? Find Free WordPress Themes and plugins.

It’s hard for a country to progress when its busiest professionals are lawyers and politicians, not engineers. That could be holding all of Africa back.

The realisation hit home at the 80th national annual conference of the South African Forum of Civil Engineering Contractors last week.

A typical Safcec member, and it has more than 400, is a “civil engineering contractor that has a Construction Industry Development Board (CIDB) grading of 6 and above and an annual turnover of more than R10 million”. There are those below the threshold, emerging members, graded 5 or below and generating less than R10m.

While they were busy at their sadly low-key conference and annual general meeting in the east of Johannesburg, Parktown was buzzing. The latter has been the scene of the Zondo Commission into State Capture for what seems like forever, and will be for a while.

Engineers were preoccupied with what is holding the economy back and lawyers were talking about who stole state resources. One has no media exposure, while the other is being broadcast, or streamed, live.

An extraordinary statistic about the 60% or so drop in employment in 10 years in the construction industry, says chief executive Webster Mfebe, went by unnoticed; while the dramatics of every witness or what they did at Bosasa or goodness-knows-where never escapes coverage.

Members bemoaned stalled roads and critical infrastructure projects at their meeting in Boksburg. Reasons included the work of what are termed “construction mafia”.

Although sometimes community members stop projects because they feel unfairly excluded from economic action on their doorstep, much-needed infrastructure is commonly derailed by gun-toting gangsters who barge into briefings, willing to kill for the tender.

Why do Africa’s engineers need to be fêted more than lawyers and politicians? An engineer working for six months produces a plan to build a road, bridge or school. A lawyer works to produce an order shifting blame from their client to someone else. This could be taken on review or challenged in a higher court. Once approved, an engineer’s plan creates something that did not exist; enabling the movement of vehicles ferrying people between work and home or ambulances saving lives.

Roads are the blood vessels of any economy. They are the catalysts of intra-Africa trade. Filling stations, restaurants, hotels and other construction projects go up alongside them, creating more livelihoods.

These could be minor, like the by-pass connecting Mashite in Limpopo to the Polokwane-Groblersdal road, or major such as the Maputo Corridor Logistics Initiative joining Mozambique and Botswana, via South Africa, or the Gautrain. Either way, civil engineering projects add value.

There is nothing wrong with lawyers. However, when they are done working, after even six years, they rarely contribute capital formation. Good lawyers are necessary, but probably at a ratio of one litigator to 10 engineers, if Thuma Mina or the African Continental Free Trade Agreement is to materialise.

The Complete – Step Process for Asphalt Pavement Installation

It’s never too late to learn something new, and when it comes to asphalt installation, there are many things that homeowners, companies , civil engineers , commercial property owners, and municipality employees may not be aware of. 

At Pavestar we take pride in educating people everything about asphalt — this is our passion. 

So please, take a look at this step-by-step overview of what an asphalt pavement installation requires — from demolition all the way to a smooth, new surface. 

randvaal asphalt / tar surfacing company

Step 1: Demolition / Removal

The first step in the asphalt installation process is to remove the existing surface, whether it is failed asphalt, concrete or pavers. Click here if you want to know if you should remove your existing surface

NB : Please note that its not every surface that is supposed to be removed. If the existing surface is strong & firm they is no need to remove the surface prime is supposed to be primed to bind the asphalt.

  • Demolition and removal is completed using heavy machinery, including small bobcats and forklifts and when necessary, front loaders and large dump trucks.
  • Debris is then removed.

Step 2: Grading and Sloping

With a clean slate, technology helps Pavestar asphalt professionals prepare the surface for appropriate water drainage. 

  • Using laser-guided transits and automatic motor graders, the Pavestar team grades the surface to be paved to ensure that water will run-off appropriately.
  • Proper water drainage is vital to your asphalt because water is a major cause of damage, including potholes, cracks, and heaving. 
pulverize2

Step 3: Prepare the Sub Base

You’d never guess that the most important part of your new asphalt surface is actually the sub base.

  • The sub base provides a stable surface to support new pavement.
  • The sub base is a frost barrier to help reduce winter damage due to freezing and thawing.
  • During the installation, base thickness, base stability, and compaction are essential steps. If the sub base is not appropriately compacted, the asphalt surface on top will not provide years of durability. 

Step 4: Humidity / Compaction Test if the area have high traffic volume

This should be done by a civil engineer . Its very important to do these tests.

Step 5: Binder and Surface Course  

This is very important part not to be set apart. Importance of Prime Coat NB – This Stage Should not be Skipped

Once the sub base is laid and any soft areas are identified and repaired, it is time to add the binder.

  • The binder should be sprayed. This is a MUST DO
  • The binder layer can be thought of as the strength of any new asphalt surface. 

Step 6: Install New Asphalt Surface

Once the supportive structures of a new asphalt surface are installed, the top layer of fresh asphalt is added to provide a clean, smooth ride.

  • Surface asphalt is made up of small aggregate, sand, and emulsion.
  • This combination of materials creates jet-black asphalt that, when installed appropriately, provides a smooth ride and a shiny, attractive finished surface. 

Step 7: Butt Joints and Transitions 

It is very rare to install an asphalt surface that does not connect to existing driveways, roadways or parking lots. As such, asphalt-paving contractors must find a way to smooth the transition from old surface to new.

  • Butt joints are areas where old asphalt or concrete meets new asphalt pavement.
  • These transitional areas require special attention to ensure that the grading and water run-off is appropriate.
  • Butt joints are important to ensure drivers and pedestrians don’t notice a difference in the surfaces. 

To Complete the Project: Final Roll

Once the asphalt and butt joints have been laid, the entire surface is smoothed and compacted.

  • Using a roller truck, the new asphalt pavement surface is compacted and smoothed.
  • This process step ensures that no small bumps of aggregate or stone are left poking through the smooth new surface. 

Your asphalt paving contractor should follow these installation steps to make sure your new asphalt surface will provide years of durability and functionally for your home, business, city or town. 

But remember that installation process should only follow a proper surface inspection and a complete estimate. Take a look at the articles below that explain those processes completely. 

CLICK HERE: Request A Free Estimate Now for Your Next Paving Project

hWith 15 years of asphalt paving experience, from roads to driveways, we are your local source for all of your asphalt paving needs.

For more information on Pavestar or to request a free estimate for your next paving project contact one of our two offices. If you live or work in the Pretoria area, call us at 0738245546.

How to Choose the Best Paving Contractor in Pretoria

how to choose the best paving contractor pretoria

Paving your driveway improves the value of your property and provides a safe area to park, walk and play. But choosing the best paving contractor can be challenging – with so many options available it’s easy for the average homeowner to make a bad choice and hire the wrong paving company.

Important Factors

Reputable paving contractors tend to have certain characteristics. Wise homeowners should look for these factors and choose a contractor accordingly:

  • Experience – paving companies that have been working in your area for years have invested in their reputation, and are more likely to provide the high level of service you deserve.
  • Local Presence – hiring a local company is important, especially if you live outside of a major city center. Local contractors are involved in community programs and local business associations, and have a vested interest in your satisfaction. Ask your neighbors for a recommendation and watch for paving trucks working in your area.
  • Proper Insurance Coverage – like any home improvement project, paving can be dangerous. The best paving contractors carry full liability insurance coverage, including worker’s compensation. This covers any accidents and property damage that occur during your project, removing the financial responsibility from your family.
  • Expert Employees – some paving companies hire sub-contractors to complete their work, meaning you will not necessarily have your project completed by the firm hired. This arrangement can also cause problems when warranty arises, resulting in slower responses and added expenses for the homeowner.
  • Licensed – besides insurance coverage, your paving contractor needs to be licensed to work in your local area.

Proper Preparation

Professional paving contractors recognize the importance of preparation. Asphalt driveways that have been laid without an adequate base or prep work will only last a short time. Be sure to get details about the excavation, base materials and compacting processes included in your quotation.

Resurfaced asphalt driveways need to be covered in tack-coat before the application of new paving. Skipping the cleaning stage results in cracking and peeling, which degrades your newly paved driveway quickly.

Comparing Quotations

Call at least three recommended paving contractors to quote on your project. If the prices vary significantly, take a close look at the project specifications. Some contractors offer lower prices, but skimp on asphalt thickness, resulting in a weaker driveway that cracks and deteriorates faster.

Ask about the compacted thickness of the asphalt included in your quote, and consider each of the factors mentioned above.

Always take your time when comparing paving quotes. Avoid contractors that require you to make a quick decision to secure a discounted price, even if they are working in your neighborhood. Be wary of those contractors that knock on doors and offer a rock-bottom rate for those homeowners willing to book on the spot. Consider how you will get in touch with this company if warranty issues arise, and always give yourself enough time to research the contractor’s credentials and reputation.

Get a Guarantee

Guarantees vary widely across the paving industry. Homeowners should ask for a minimum one-year guarantee against workmanship and materials. This covers you from installation errors, poor quality materials and any other issues that arise during the first twelve months.

Find out exactly what the warranty covers before hiring your paving contractor. A workmanship guarantee commonly includes faulty workmanship, sloppy edging or incorrect dimensions. A materials guarantee often includes depressions or dents, cracking and premature degradation of the asphalt.

Drainage Considerations

Experienced paving contractors know that a properly designed driveway is essential for adequate drainage. Asphalt driveways and pathways should slope away from your home, designed to follow the optimum angle that promotes drainage without presenting risky conditions.

Paving contractors also need to consider the surrounding property and location of the nearest sewer or drain. Water runoff from the driveway and paths should be directed in an efficient manner, without obstructing traffic areas or destroying the landscape. Swales, turf and gardens need to be considered when designing your paved driveway.

Caring For Your Paved Driveway

Always be sure to follow your contractor’s directions about the care and use of your newly paved driveway. Fresh asphalt needs significant time to harden and strengthen; any misuse during that initial stage will damage the finish and ruin your driveway.

Avoid parking heavy trucks and other large vehicles on your newly paved driveway. Ask the contractor how long you need to wait before parking any vehicle on the surface, and avoid placing concentrated loads (like car jacks, ramps and sports equipment) on the asphalt for at least one week. Excessively hot temperatures extend the hardening period.

Asphalt scarring occurs when the tires of a parked vehicle are turned in place. Dents and dips result from parking in the same location time after time. Stains, deterioration and discoloration happen when oil, gas or other fluids leak onto the surface. Avoiding each of these occurrences will result in a more attractive, durable paved driveway.

Driveway sealing prevents cracking and may help to extend the life of your asphalt driveway. Many experienced paving contractors recommend waiting for about one year before applying driveway sealants. And some would confirm that sealing your driveway is not entirely necessary, although it does improve the appearance of your home by creating a smoother, uniform color on the asphalt.

Hiring the best paving contractor requires careful consideration and adequate time. Be sure to obtain at least three quotes and compare the service, experience and warranty of each contractor before looking at the price. Pay attention to project specifications, such as asphalt thickness, when comparing prices and always hire a licensed, local professional to ensure a high quality finished product.

pavestar contractors

Posted by: George