Topic: Blog

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

Asphalt paving news

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.


The Lost Art Of Concrete

Cement Contractors

The saying “They don’t build ‘em like they used to” is literal truth in the concrete industry. For decades, modern science has struggled to work out how ancient societies such as the Romans were able to create buildings, monuments and roadways which are still visible and even in use today, when the average lifespan of modern concrete tends to be far more modest. Now, a team of scientists from the University of Utah believes they may have found the surprising answer to this centuries-old mystery.

Modern concrete uses Portland cement as its base, which is a fine powder created from lime, chalk, sandstone, iron and other materials and then combined with aggregates of varying sizes. However, the Romans used a type of cement created from the ash of certain volcanoes. These volcanoes’ emissions contained a rare combination of mineral elements which only occurs naturally in very specific areas with particular geological profiles. What’s most surprising is that the minerals which make Roman cement different from Portland cement appear to react to seawater, which encourages the crystalline structure of the minerals to continue growing. This actually makes the concrete self-healing and impedes cracking, a feat modern science is still trying to replicate.

This discovery of how Roman concrete was made is important because it could lead to greener and more eco-friendly concrete production and paving technologies, as well as structures with higher strength, structural integrity and longevity under adverse conditions than modern concrete allows for. In addition, Roman concrete did not use reinforcing steel such as a wire mesh mat or rebar, both of which Portland cement will corrode and degrade over time. This may lead to significant cost reductions for new construction on structures like bridges, building footings and other applications.

However, the research team warns it’s too early to get too excited about Roman concrete. First, Roman concrete relies on very specific minerals, namely tobermorite and phillipsite, being present in certain quantities. The researchers say the composition of Roman concrete was largely a matter of luck and being in the right place, at the right time, with access to the right materials. Second, we don’t yet know exactly how the Romans made their cement or what the process was for mixing it with aggregate and placing it. This by itself may leave us several years, or even decades, away from being able to use Roman concrete effectively.

Despite these hurdles, the concepts behind Roman concrete and other green discoveries from the ancient world are constantly being studied, evaluated and applied to our modern understanding of how to build things that last. At Calvac Paving, we’ve been serving the Bay Area for over 40 years in the most environmentally friendly, safe and expedient way possible. We’re always on the lookout for new developments, technologies and ideas which will let us do our jobs more effectively, with less impact on the world we all share. To learn more about our commitment to the environment, or how Calvac Paving can help you with your next project, contact us at:

Calvac Paving
2645 Pacer Ln
San Jose, CA 95111
(408) 837-9021


Paving The Way Forward With Recycled Plastic

recycled paving

From India to Indiana, from Cumbria, England to Corpus Christi, Texas, everyone agrees the amount of free-floating plastic in the environment is an ongoing problem. With an estimated 5 trillion pieces of plastic adrift on the surface of the ocean alone and uncountable more tons of the material in landfills and vacant lots all over the world, plastic both makes our current standard of living possible and poses one of its most dire threats.

At Calvac Paving, we make a point of keeping current on the latest breakthroughs and experiments in building and paving technologies, and new processes for repurposing plastic as a paving material is very much in our wheelhouse. Several different processes are in the testing stage, including using plastic to coat paving aggregates and reduce the amount of bitumen necessary for traditional asphalt; adding pellets of recycled plastic as part or all of the aggregate portion of the asphalt; and a Lego-like process of building roads from paving blocks of recycled plastic.Polymeric dye. Plastic pellets. Colorant for plastics. Pigment in the granules.

Apart from the obvious advantages of reducing the environmental impact of discarded free-range plastic, the primary benefit of utilizing plastic-impregnated asphalt is twofold. First, using plastic seems to increase the tensile strength of asphalt significantly, up to 60% in certain mixes.

Second, by reducing the amount of bitumen, or tar, used as the binding agent in most industrial asphalt mixes, it may also cut the cost of paving by up to 15%. The higher tensile strength potentially increases the size and mass of traffic which can use these roadways, meaning it may be possible to move more freight and larger vehicles in areas where existing paving and statutes would simply not permit them. In turn, this could substantially reduce transportation costs and thus the costs of everything from steel to gasoline to milk.

In addition, plastic-impregnated asphalt may lend itself more readily to hybridization with innovations such as the self-charging roads which we’ve discussed recently. As the costs of developing and deploying these technologies shrink, the likelihood of incorporating multiple technologies into a single roadway increase at a similar rate.

 

Almost as interesting as what plastic asphalt can do is the story of the various ways in which its applications came to be. In India, a chemistry professor, annoyed with the potholes of his city, remembered seeing people in Mumbai patching similar potholes by filling them with empty plastic bottles

electric charging road ways
and then heating them to a liquid state. In Scotland, an engineer built on the India protocol by using pellets of recycled plastic, aggregate and a very small amount of bituminous binder to create a roadway surface which causes less wear on tires. Meanwhile, a company in the Netherlands backing the block paving strategy was inspired by the idea that using interlocking blocks would allow for easier infrastructure placement and damaged section replacement.

By reducing the amount of “trash” plastic in the open environment and repurposing it in new ways, these innovators are also challenging accepted notions of what is possible in large-scale construction. These changes in turn may serve to make not only the final product of construction initiatives, but the processes and techniques by which they are created, more efficient, effective and environmentally friendly.

Calvac Paving takes our role in environmental sustainability and finding better ways to accomplish the tasks we undertake more effectively and safely very seriously. It is the entire reason we keep such a close eye on how construction technology is changing and evolving. When and where possible, we make it a point to adopt and implement these changes ourselves, because while we know the “tried and true” methods have survived and been used as long as they have for very good reasons, we also understand there’s almost always a better way to do just about anything if you’re willing to look hard enough for it.

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We at Calvac Paving believe we can best serve the communities we live and work in by emphasizing the fastest, safest and most c
ost-effective means available to do our jobs, while striving to reduce the impact our industry can have on the global as well as local environment. It’s all part of Calvac Paving’s commitment to not just doing the job, but doing it right. We do it for our clients/stakeholders, for our community and for a better, cleaner, healthier world. To learn more about Calvac’s commitment to the environment, or to put the four decades of experience we bring to every project to work for your job, please contact us at (408) 225-7700  or https://www.calvacpaving.com/contact-us/

 

 


Calvac Paving to Attend And Exhibit At The 2017 CAA Connect – Rental Housing Conference & Expo

The Calvac Paving Team

Calvac Paving, a Bay Area asphalt and concrete maintenance company, is attending the CAA Connect – Rental Housing Conference & Expo, on Tuesday, April 18th. Calvac once again is a Master Sponsor of the CAA, as well as a trade exhibitor at this year’s CAA Connect.

 

Calvac Paving

As a company spokesperson noted, the event—which is hosted by the California Apartment Association—will be held at the Santa Clara Convention Center. The full-day conference typically draws a crowd of 1,500-plus professionals from a variety of industries.

The team from Calvac Paving will be in Booth 426 during the event. As the spokesperson noted, attendees are welcome to come by the booth and enter to win a raffle. “People who take pictures of Calvac Paving’s booth and use the hashtag #CAAConnectExpo will automatically be entered to win a prize from the asphalt and concrete company,” the spokesperson said, adding that representatives from the company are looking forward to meeting other attendees and exhibitors that are also in the Property Management and Maintenance industry. One reason the event is so popular with attendees, the spokesperson said, is that it’s a one-stop shop for information relating to the rental housing industry.

For example, this event features 160-plus exhibitor booths and educational seminars that feature nationally recognized speakers. Everyone who attends—from owners and corporate executives to property managers, leasing professionals, California Certified Residential Managers and more—will leave the event feeling like they have received the answers and information they need about their most urgent management challenges, as well as determining which vendors are the best for their businesses.

“Calvac Paving has served the Bay Area for over four decades, so we are confident that we can help answer a variety of questions that attendees may have about our industry while also enjoying meeting new clients,” the spokesperson said.

About Calvac Paving:
Calvac Paving 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/

Calvac Paving
2645 Pacer Ln
San Jose, CA 95111
(408) 837-9021


Calvac Paving And San Harbour South HOA : A New Parking Lot Case Study

 

Calvac Paving recently undertook a paving rehabilitation project for the San Harbour South HOA  association located at 906 Beach Park Boulevard in Foster City, California. The existing pavement was over 40 years old and was starting to exhibit severe cracking and base failures.

Calvac Paving setting up Primary Client Concerns

The primary client concerns included:

  • Continuous access during the milling, repaving and striping operations

  • Cost

  • Schedule and time management

  • Quality surface at the project’s end

Proposed SolutionIMG_1971

After reviewing the jobsite in person, we came up with a range of possible solutions that would meet the client’s needs.

Calvac PavingDue to sub-grade issues. We proposed milling the existing pavement down 2” from the existing surface and laying approximately 2,500 tons of ½” aggregate hot mix, in addition to the replacement of 1,500 linear feet or 90 cubic yards of concrete valley gutter. Our recommendations and proposed fix were accepted by Calvac’s client and HOA Board. The job was undertaken in phases as to not disrupt the community at one time.

Final ResultsFinished Project Piece

The end result of the San Harbour South HOA project looked fantastic! The project went off without any difficulty and was completed within the stated schedule and budget.

Calvac Paving is proud to have served the Bay Area for over 45 years with a wide range of paving, concrete and ADA access planning and implementation solutions. Why gamble with the outcome of your project? Make sure your contractor can get it done right the first time, every time. To learn more about how Calvac Paving can help service your construction job or to obtain a quote for services, please call us at 408-225-7700.

 

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


Calvac Paving to Exhibit at CACM’s Northern CA Law Seminar & Expo January 26-27

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Calvac Paving, a Bay Area asphalt and concrete maintenance company, is attending at CACM’s (California Association of Community Managers) Northern CA Law Seminar & Expo.

This event will be held January 26th and 27th at the Hyatt Regency Santa Clara and Santa Clara Convention Center. According to a Calvac Paving spokesperson, the event is “California’s premier event for the community management industry!”

The Calvac Paving team will be exhibiting at Booth #1021 in the Paradise Found Exhibit Hall. Also, they are Welcome Reception Drink Ticket Sponsors, to be held on Thursday January 26th from 4:30 pm to 6:30 pm. The reception will include appetizers, a no-host bar and informal networking.

Beyond the exhibit, the event will enable many in California’s management industry to learn and grow professionally. CACM notes, “Let’s face it, the demands and expectations community managers face have never been greater. Do you have the knowledge, expertise and tools you need to meet and exceed those expectations and move your career forward? At this year’s Law Seminar & Expo, we’re bringing California’s best and brightest to help you get there.”

“We hope that all attendees can stop by our booth at the exhibit,” said a Calvac Paving spokesperson. “With over 40 years of experience in the industry, we are looking forward to sharing our expertise and meeting new clients!”

About Calvac Paving:
Calvac Paving is a full-service asphalt and concrete maintenance company that has been serving the greater Bay Area since 1974.

Calvac Paving
2645 Pacer Lane
San Jose, Ca 95111
408-225-7700


5 Simple Ways To Winterize Your Paving

Calvac Paving Team working at a hoa

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

 


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


Latest Asphalt Repair Project From Calvac Paving

Calvac Paving's Project Redwood Shores

Modern technology and paving practices have revealed faster, more cost-effective solutions to problems that once would have required expensive tear-out and repaving operations. One of the best examples we at Calvac Paving have ever seen was the rehabilitation of the Redwood Shores parking lot we recently undertook. This project mixed new technology with time-tested techniques to deliver a great result for the client, faster and more efficiently than conventional paving methodology.

 

The parking lot itself was old, cracked and weathered from years of use, but not so bad as to need a complete removal and replacement. Age and oxidation from poorly placed asphalt atop moisture-sensitive base material had caused the asphalt to crack and dry out, reducing its flexibility and its resilience. The parking lot was in need of a major face-lift, and Calvac Paving had the perfect product and the years of specialized talents to make it happen. This was a very unique project in that it perfectly fit the criteria for a very specific application: a Petromat overlay.

 

Petromat is a non-woven reinforcing fabric that is applied using a liquid asphalt binder known as RS1, which works as a penetrating adhesive and moisture barrier. The Petromat fabric helps to retard the existing cracks from reflecting through the new asphalt surface and gives the finished surface a higher tensile strength, thereby distributes the weight of heavy truck traffic over a greater area. After that, a full two-inch placement of hot ½”fine asphalt is placed with self-propelled paving machines.  Once the asphalt has been placed, the compaction equipment follows immediately behind the paving equipment. These very large and heavy smooth drum rollers compact the hot asphalt to a dense, smooth and uniform finish.Day 2 of the project

Once the compaction process is completed and the hot asphalt has cooled, we then apply a fog seal mixture of 50% SS1 and 50% water. This is designed to help bond the top layer of new asphalt and give it that black shiny “new pavement” look. After the Petromat overlay is 100% completed to our satisfaction, we can proceed with striping and stenciling operations.

Because of the unique considerations and time constraints of the job, Calvac Paving recommended a 2” Petromat overlay over the entire parking lot, measuring approximately 63,500 square feet. This offered the best results for the budget and gave them similar benefits to getting a brand-new parking lot for years to come, without the hassle, expense and lost time of a complete remove and replace. This project also had some very unique parking design restrictions, offering a perfect opportunity for Calvac Paving to design a new layout for the regular and ADA stalls. This redesign included larger stalls, which helped prevent unnecessary dents in car doors, making both the tenants, and owners happy with their new parking lot investment.

IMG_8848

 

Please feel free to drive by and see what a truly professional paving project should look like, and what your commercial parking lot can look like too! From a private roadway rebuild to a complete parking lot rehabilitation and much more, there are very few jobs Calvac Paving cannot do. We’ve been serving the Bay Area for more than 40 years. Now let us serve you! To find out more about Petromat or how we can help with your next project, contact us by email or by phone at:

(408) 225 – 7700

(650) 694 – 7944

(831) 375 – 7944

When you need the best, don’t leave the results to chance. Contact Calvac and have the job done right the first time, every time!

 


How Many Parking Spots Will I Need For My Strip Mall?

Strip Mall

Happy Monday Everyone! In this edition of Maintenance Monday, one our social media friends sent us this question.  I own a strip mall in San Jose, we have 10 retail stores, with 75 parking spots. How do we figure out the correct amount of handicap parking spots to have?  The answer is…

Thank you, In this case, 75 stalls. Three would need to be accessible spaces (not handicap), of which one of those would have to be van accessible.  One thing to consider is the current count. If this property has 5 existing accessible spaces, it is best to put back those 5.  The reasoning is that the standards are the minimum and it is not usually a good idea to decrease accessibility on a property.  This is why it is important to plan these layouts with an ADA specialist, you don’t want to create a problem in the future by guessing or over estimating today.

How many parking spots do I need?

 

 

At Calvac Paving, we have CASp (Certified Access Specialists) available. Our CASp specialists serve the San Jose area as well as the greater Bay Area.