Posts By: Calvac Paving

The Greenest Mile: How Charging Roads May Make Electric Cars More Efficient Than Ever

At Calvac Paving, we support technologies and construction methodologies that offer a more environmentally sound and sustainable way of creating the things we as human beings have come to rely on. From asphaltic concrete recycling to innovations such as self-healing concrete, we are always on the lookout for trends and techniques that change how we operate for a greener, healthier planet. This is why we are so excited about the possibility of roads that actually recharge electric cars as they drive! These specially designed roadways will reduce pollution, increase the performance and range of electric cars to unheard-of levels, and reduce or entirely eliminate the need for charging stations.

 

In the UK, this seeming science fiction is becoming science fact, as the government moves to experiment with charging roads. Operating on the same principle as a wireless phone charger, the roads will charge cars through magnetic induction resonance. Cables implanted in the material of the roadway generate a specialized electromagnetic field that the car can convert into usable energy. The roads will also include communications equipment attuned to the unique energy signature of an electric car, alerting the road that an electric vehicle is present and to initiate the power generation process. This will allow properly equipped electric vehicles to recharge on the go, without needing to stop for extended periods to recharge, one of the biggest stumbling blocks cited in the adoption of electric vehicles thus far.

The roads the UK are experimenting with will be restricted for the time being, ensuring that regular vehicles do not impede the testing process. The government is committing 500 million pounds, or roughly $779 million, to these experimental roads over a five-year span. This technology is already in use in South Korea, powering rail systems with ranges of up to 15 miles, and will be combined with an added initiative to provide charging stations every 20 miles in the UK. The combination of options for drivers will help eliminate so-called “range anxiety,” which one advocate described as a combination of running low on gas and having one’s cell phone be low on battery simultaneously.

Recent Calvac Paving Project

Magnetic induction resonance works in much the same way as a powerful operatic voice can shatter crystal. When the voice and the crystal reach a similar resonance, the molecules in the crystal begin to vibrate rapidly and cause it finally to break. Instead of shattering or rupturing the battery, however, the cables the charging roads utilize will create a harmonic resonance within the battery that allows it to transform the signal from the roadway into usable power.

Because many roadways contain metal in addition to the native subgrade, road base and asphalt in the form of rebar, wire-mesh matting and metallic joints between road sections, the cables can use this metal as a part of the transmission system for the power. The metal components of the electric car can be employed as a receiver, directing the transmitted energy to the battery without the driver needing to stop, handle any charging devices or worry about whether or not the car will make it to the next charging station.

Major car production companies such as Audi are leading the research into this technology, which they believe will relegate internal-combustion vehicles to the status of horse and buggy. By working together to create a standardized plug-in system for use in garages, parking structures and ultimately at-home use, these car manufacturers believe they can make charging stations easier to find and thus make electric cars more attractive. The idea of “switching stations,” where a person can simply replace a drained battery with a fresh one and continue on, and the increased range of electric cars to around 250-300 miles per full charge depending on the type of car and battery size, will help expedite this process.

While paved roads are still very much a part of the future landscape, what drives over those roads and what lies beneath them may soon play a more crucial role than ever in our environmental integrity and ability to move people and cargo. Calvac Paving will be watching the trials in the UK with a great deal of interest, because we want to see if this technology truly is feasible and what the implications will be for the paving industry. If everything pans out as the equations and scientists claim, this could be a major breakthrough and a huge tectonic shift in how things are designed in both construction and automotive industries, as well as manufacturing and transportation as a whole. We think that’s a pretty big win, and look forward to this technology here at home!

Maintenance Mondays – Drive Lanes Removed & Replaced

Maintenance Mondays: This project was for a Medical Building. This required the crew from Calvac Paving to work on a Sunday to minimize disruption. The bulk of the drive lanes were damaged to the extent that we had to remove and replace approximately 45% of the drive lanes. The crew completed approximately 260 tons of removal and replaced with 260 tons of hotmix asphalt. All of the removed asphalt was hauled to a recycle plant. Our crews were completed and out of our yard and on their way home by 6:30pm.
Calvac Paving – Top Quality. On Schedule. On Budget.

Calvac Paving Is Hiring!

Calvac Paving

Calvac Paving, a San Jose based Asphalt and Concrete maintenance and construction Contractor is looking for Equipment Operators, Laborers and Skilled Workers. We are looking for full time workers and experience in Asphalt and Concrete construction is a plus.

 

Applications must be completed at 2645 Pacer Lane, San Jose, CA 95111

 

About Calvac Paving

Over the past 40-plus years, Calvac Paving has become one of the most experienced and reliable Asphalt and Concrete contractors in Central California. Our focus on individual project attention and meeting our STAKEHOLDER’S expectations has helped us to add scores of Property Managers/Owners, HOAs, Corporate buildings and campuses, Retail as well as Multifamily properties to our list of appreciative clients/stakeholders.

 

Calvac Paving Is Hiring

5 Simple Ways To Winterize Your Paving

With winter and its accompanying rainfall on the way, the fall is a good time to take a look at your existing pavement and make sure it’s ready for the weather to come. Calvac Paving has been in the business for over 40 years, and in that time, we’ve learned a thing or two about how to solve small problems before they have a chance to become big ones. Now, we’re pleased to present this list of simple things you can watch for so your pavement lasts longer and looks and performs better in the process, even when the worst of the California winter weather strikes!

  1. Do a routine walkthrough of your paved areas.

Parking lots and other paved areas should be checked at least semiannually for problems. Things to look for include:

  • Areas of standing water. Water can break down the asphalt binder and leak down into the subgrade, eroding it over time. This is also an indication that the pavement or subgrade may already be failing, because modern grading techniques are designed to establish a grade that flushes water away from the parking area and toward designated drainage points.
  • Oil or other chemicals that leak directly onto the pavement. Just like water, some chemicals associated with vehicles can cause binder breakdown and lead to subsurface problems. Cleaning up oil and other chemical spills as quickly as possible can help prevent this and keep your asphalt in better condition.
  • Cracks, divots or uneven areas. These can be caused by weeds growing beneath the surface, freeze/thaw patterns, standing water and oil or ongoing heavy truck traffic. Small cracks and divots are often the first visible sign of possible asphalt breakdown, and it’s more cost efficient and less intrusive to fix them when they’re small by seal coating or spot patching than it is to do a complete tearout and reinstall of the paving.
  • Striping: Old, dull or worn striping and pavement-level signage such as fire lane indicators and other information may be harder to see and read during winter months. Especially in ADA stalls, the striping and signage should always be clearly visible to make sure people know where these areas are.Recently Complete Project
  1. Clear debris from drainage channels and curbs.

If water has nowhere to go, it doesn’t matter how good the drainage plan for your lot is. Making sure the drainage channels, storm sewers and other inlets to the runoff system near your property are clear of leaves, branches, garbage and other obstructions will help the water flow better and make it less likely to pool up on your property.

Calvac Paving Team

 

  1. Limit or restrict heavy-vehicle traffic as much as possible.

Large trucks such as semis, garbage trucks and other heavy vehicles can place a lot of stress on asphalt. By itself this shouldn’t be a problem, but when the base course and subgrade are compromised by water or plant intrusion, it could speed up the breakdown process for the asphalt. If at all possible, try to limit, restrict or even out the traffic pattern for such vehicles within your lot to minimize the time they spend on your pavement.

  1. Be sure it’s sealed.

Even if your parking area is free from cracks and other problems, it is a good idea to have it seal coated every 4 to 5 years at the minimum. This is because seal coating helps rejuvenate the asphalt binder at the surface, adding an extra layer of protection against traffic, water and other spills. Even better, it will help make your parking lot and driveways look newer, especially when you redo the striping at the same time. This makes your property more attractive, safer to navigate and less likely to fail for the long haul.

  1. Seek professional help.

If you’re not sure if the paving problems you’ve identified are “big enough,” or if you think your pavement needs a facelift or a complete overhaul, Calvac Paving can help. We’ve been serving the Bay Area for over four decades with quality construction solutions including:

  • Curb and gutter remediation, repair and replacement
  • Paving rehabilitation, tearout and reconstruction
  • ADA access compliance and signage
  • And much more!

We take great pride in delivering a great product for your project, within the schedule and budget we agree upon. For more information about how Calvac Paving can help you with your  paving or asphalt project, please contact us for a no charge estimate.

 

Calvac Paving
2645 Pacer Ln
San Jose, CA 95111
408-225-7700

 

Studies Show Cigarette Butts May Be The Next Hot Thing In Paving

Every year, about 6 trillion cigarette butts are produced worldwide, or about 800 discarded butts for every man, woman and child on the planet. Not only are these butts an unsightly and expensive waste disposal problem, but the toxic chemicals which the filters trap and contain leach out over time to poison soil, groundwater, rivers and oceans. Now, a researcher at RMIT in Melbourne, Australia says he may have found a surprising answer to this problem: incorporate cigarette butts into asphalt aggregate!

According to the researcher, by coating the butts with a combination of paraffin wax and bitumen, the black substance also known as “tar” that gives asphalt its distinctive properties, it is possible to trap toxins which used butts contain while repurposing them as a lightweight, flexible asphalt aggregate component. This reduces the overall weight of an asphalt mix design while removing a potential 1.2 million metric tons of waste from the planet’s biosphere.

Another interesting side effect of adding cigarette butts to asphalt is the reduction of heat. Asphaltic concrete has been directly linked to the so-called “urban heat island” effect, caused by vast amounts of asphalt in a relatively small area. Cigarette filters are mostly made from cellulose acetate, a fibrous material which is spun down to look and feel like cotton. This material serves as an insulator which filters out toxins in cigarette smoke while helping prevent burnt fingers for those who simply must light up. These filters reduce thermal conductivity and reduce the thermal density of the mix. When placed as part of a roadway the asphalt containing the filters absorb and diffuse more heat, resulting in a cooler surface temperature and less radiant heat being redirected into the environment.
The final paper on this study states that butts coated with bitumen satisfied requirements for medium- and heavy-traffic mix designs. This would apply to interstates and surface streets with heavy commercial volume. Streets in residential neighborhoods, parking lots not marked for commercial vehicles and similar applications might use paraffin-coated butts. In the study, the research team used 10kg, 15kg and 25kg (about 22, 33 and 55lbs respectively) of encapsulated cigarette butts per cubic meter (1.30795cu.yd) to determine the ideal asphalt mix.

Since cigarette smoking on a global scale isn’t likely to go away anytime soon, finding new ways to deal with  this waste is becoming a more pressing problem every day. Estimates claim that the mass of discarded cigarette butts may increase by as much as 50% by 2025 because of the increase in global population. Knowing this, recycling these butts into asphalt and other lightweight construction materials, as the author of the study proposes, may help us all breathe just a little bit easier.

At Calvac Paving, we know we only have one planet, and it’s up to all of us to care for it the best way we know how. There’s no reason that building a solid product and being ecologically responsible should be mutually exclusive, and we’re always on the lookout for new ways to incorporate green ideas into our building design.. We will keep a close eye on this and other “green” developments in construction materials, so we can continue to deliver the most environmentally sound products and processes possible without compromising on quality or durability. It’s all part of our commitment to make the communities we serve, and the world we all share, a safer and healthier place for everyone.

Calvac Paving Obtains ADA-CASp Certification

The Americans with Disabilities Act, or ADA, sets very strict standards for commercial construction to ensure that people with physical disabilities have full access to public buildings and places of all kinds. Because the provisions of the ADAS, ADA standards, are constantly evolving, many construction and architectural firms, local and state inspectors are unaware of how the different aspects of ADA codes impact the specific construction of various structures, including the need for ramps, compliant parking stalls and upgraded access and barrier removal in the case of building remodels and renovation.

ADA certification in the form of CASp is particularly important in the state of California, because of the constant turnover of property management and ownership. Often the first sign that anything is amiss with a particular building or business’s ADA compliance comes in the form of a property inspection, visitor complaint or drawing revision, with expensive consequences in exposure to litigation, retrofitting to comply with California Building Code and the ADA standards and other related costs of remediation. While CASp certification is not yet commonplace, it is believed to become far more important among construction-industry professionals in the coming years.Middle view of ada ramp install

Calvac Paving has been serving the Bay Area for over 40 years, and has been closely monitoring changes and amendments to the ADA standards since they were first put in place in 1991. Several years ago, Calvac Paving’s President, Jim Adam, decided to take this aggressive monitoring several steps further and pursue full CASp, or Certified Access Specialist, certification. This rigorous training and certification program requires applicants to be fully trained and cognizant of issues concerning building and business access for disabled persons at both the state and federal levels to ensure compliance with all ADA provisions.

Jim explained that his purpose in seeking this certification was to better serve Calvac Paving’s clients and the general public. “By training for years to understand the history, goals and application of the Americans with Disabilities Act, I am better equipped to ensure Calvac Paving’s clients a final product that will provide the barrier removal and access that the current CBC [California Building Code] and ADAS require on their properties.”

The CASp certification benefits all the stakeholders in the building process, as well as the general public. “{CASp} certification gives a confidence level that the project will be correct and that you will be able to avoid potential litigation…while getting the final product you need to be CBC and ADAS compliant.” As more construction professionals become CASp certified, Jim says the multiple points of view will help to reduce conflicts between differing objectives and strategic building outcomes while ensuring all members of the design and execution team are familiar with the code requirements that ADA imposes. Jim says this is a win for everyone, but especially the end user, which is why he sought out CASp certification to begin with.

He says he’s known for years that ADA certification would be an important step in Calvac Paving’s future ability to serve clients and the public more effectively. “The process for me started more than ten years ago when I hired ADA compliance experts to educate myself, our estimators and lead field personnel long before there was a CASp program. Then a couple of years ago I started the training process to become CASp certified. We’re trained and tested on all barrier removal and accessibility codes…it allows us to be true experts in barrier removal.” Jim also feels that Calvac Paving benefits directly from his ADA compliance expertise, because it allows him to ensure his crews can do their jobs more efficiently and “do it right the first time,” as he puts it.

Having access to the CASp certification gives Calvac Paving another powerful tool to serve its clients and help reduce potential compliance issues and costs for everyone involved, and Jim believes that as CASp certification grows in popularity, it will further establish Calvac Paving as an industry leader in ADA compliance and building accessibility for all. This, he feels, will also give stakeholders more confidence and alleviate concerns about whether or not their buildings and businesses meet applicable building codes for accessibility. For more information about Calvac Paving’s CASp certification and how this can help expedite your construction project and ensure project compliance, click here to email us or call (408) 225 – 7700!

Calvac Paving Maintains High Safety Work Record

The construction industry requires a delicate balance between worker safety and work completion and efficiency. At Calvac Paving, we value the safety and health of our employees as an integral part of our Business Plan. While many companies say this, we are pleased to be able to provide hard numbers to prove it. Our Ex-Mod(California Modification Rating System) rating of 74 with our workers’ compensation insurer is one of the lowest in the industry. This means that over the last three years, our experienced workers’ compensation losses have been 25% less than the conventional wisdom of the insurance industry said they should be. All this sounds very impressive, but what does it actually mean? Here’s a closer look at why this is big news for Calvac Paving and our valued clients.

Calvac Paving Crew Hard At work

What Does Ex-Mod Really Mean?

In simple terms a company’s  experience modification compares actual losses to expected losses. The experience rating system, in essence, adjusts the premium an employer will pay based on a comparison of that employer’s history of payroll and claims (collectively referred to as “experience”) to the average experience of other employers within the same classification. The result of this comparison is an experience modification. A Ex-Mod rating of a  100 is average, and pays 100% of the customary premium for coverage. Likewise, a company with an ex-mod of 125 would pay 125% of the industry average premium, because of the higher risk and nearly certain greater expense involved in the carrier keeping this company on the books.

Calvac Paving’s rating of 74 is well below the industry standard and means that we pay less than 3/4 of what many of our competitors would for identical workers’ compensation coverage. The best performers in the industry rarely reach an ex-mod of below 70, because insurance carriers can hardly afford to give away their coverage. However, our ex-mod does provide a verifiable, actionable metric by which to measure worker safety and the likelihood of on-the-job accidents and injuries among our employees.

How Is Ex-Mod Calculated?
The State of California’s Worker’s Compensation Insurance Rating Board put new rules in place for 2012, based on recommendations from the state insurance commissioner in 2008. These rules state that insurance ex-mod is calculated every year as an average of the data from the three preceding calendar years. The WCIRB guidelines require that insurance carriers provide an ex-mod score statement each year, usually at least 30 days before renewing the premium. These guidelines are intended to incentivize good occupational health and safety practices and limit workers’ compensation claims, but at Calvac Paving, we just call that business as usual. The financial perks that come with having a great safety record are always welcome in the business world, but what really matters to us is what our ex-mod means in the real world: the fact that our employees go home every night to their families in the same condition they left the house in the morning.

Calvac Paving Operating Machines

What Does Our Insurance Broker Say?

Our insurance broker, NFP/Thoits Insurance, consistently praises our safety record and the programs we use to improve it. Because we take our people’s safety so seriously, we incorporate training on every aspect of construction safety, site and roadway hazards and first aid training. We work closely with our carrier to implement and maintain a sound, viable loss prevention strategy, including IIPP and Early Return to Work programs that help our employees get back to work sooner while remaining in compliance with their healthcare provider’s orders. Because of these factors, our broker has consistently praised our programs and proactive worker safety initiatives, even going so far as to note that our programs are paving the way for future improvements.

From The Principals

Calvac Paving’s Principals are justifiably proud of the company, management and employees for the way they have worked together to make a safer workplace a reality. By continuing to train employees in proper on-site safety protocols and emergency measures as part of a program that meets Cal-OSHA standards for workplace safety, Calvac Paving is leading the way in setting the highest benchmarks possible for worker safety and lost-time injury prevention. Even more importantly, it means Calvac Paving’s employees get to enjoy more productive working days and quality, healthy time with their loved ones when off the clock. While construction continues to be a challenging field in which to balance productivity and safety, we take great pride in proving it’s possible every day.

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Calvac Paving Celebrates Over Four Decades in Business

Calvac Paving, a Bay Area paving and concrete company, is pleased to announce that they are celebrating over four decades in business. Since the day they first opened for business in 1974, Calvac Paving has strived to offer a wide variety of services, including concrete hardscapes, asphalt repair, interlocking pavers, crack filling, seal coating, and many others.

Over the past 40-plus years, Calvac Paving has grown to become one of the largest Bay Area paving and asphalt contractors. From business owners that need new concrete sidewalks and ADA ramps to schools that have old and cracked asphalt parking lots that are in desperate need of repair, the friendly and experienced team at Calvac Paving is ready and able to help.

In addition to offering top-notch service, Calvac Paving’s website is exceptionally user-friendly, providing visitors with in-depth explanations of the various services they offer. The educational articles not only describe what each service entails, but when it is typically needed. This can help business owners, commercial property managers, homeowners association managers and many other clients to educate themselves and their clients about what work is needed at their properties.

For example, the article about asphalt repair explains that interconnecting cracks called “alligatoring” are typically found in high traffic areas or near dumpster enclosures.

“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,” the article noted, adding that Calvac Paving will mill, saw cut or jackhammer the perimeter of the failed areas.

“It is recommended that the new ‘patch’ be placed at a minimum thickness of 1-1/2 times the original asphalt depth to bridge any inherent weakness in the base material in that area.”

Anybody who would like to learn more about Calvac Paving is welcome to visit the user-friendly website or Facebook Page at any time; there, they can read more about the high quality services they offer.

About Calvac Paving:

Calvac Paving Inc. is a full service asphalt and concrete maintenance company that has been serving the greater Bay Area since 1974. For more information, please visit http://www.calvacpaving.com

Petromat Overlays

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.

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Striping

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.

servicesBig6