Interested to learn how pervious concrete pavement systems are considerably more effective, and versatile, than other stormwater management BMPs? Or how pervious concrete can simplify your stormwater management designs and reduce project costs? Join the APWA Monterey Bay Chapter and Bay Area Pervious Concrete on June 7th in Seaside, CA for a FREE three hour technical workshop that will provide you with the knowledge and tools to simplify your stormwater designs, using cost effective and low maintenance pervious concrete stormwater systems.Read More
Over the several years BAPC's David Liguori has worked with Caltrans to update their pervious concrete design guidelines and specifications. Recently, he and the California Nevada Cement Association were asked by Caltrans District 4 to provide a pervious concrete workshop for their material, pavement, stormwater, and highway engineers.
The three hour workshop provided 28 Caltrans engineers with the latest developments in pervious concrete system design, specifications, and best management practices. Afterwards attendees were bursting with ideas and projects where pervious concrete would help solve their stormwater design issues. They expressed how grateful they were that our presentation was technical, detail-oriented and highly educational, not just a fluffy sales-pitch.Read More
The second in our series of green infrastructure tours. This time Sonja O'Claire joined the ASCE SF Chapter's Sustainability Committee on a tour of the California Academy of Sciences ("The Academy"). Known as the "greenest musuem in the world," The Academy is an exhibit in-and-of itself for all things related to sustainable design. Tour attendees went behind-the-scenes to learn about the unique design elements The Academy employs to lower its impact on its environment.Read More
Need a good reason to get out of the office? Want to learn more about green infrastructure and pervious concrete? Join the ASCE Sustainability Committee on November 2nd, 12:00-1:30pm, for a guided walking tour of the Holloway Green Street project, led by Mike Adamow of SFPUC. Register on Eventbrite.Read More
Recently the San Francisco Public Utilities Commission (SFPUC) and project stakeholders celebrated the completion of the Holloway Green Street at its ribbon cutting ceremony. David Liguori, Bay Area Pervious Concrete's President, joined the celebration and even was invited to hold the ribbon for cutting. Watch videos of the ceremony and pervious concrete demonstration and be wowed along with the rest of the attendees.Read More
We are delighted to share that the Holloway Green Street construction phase has completed and we’d like you to come celebrate! SFPUC is throwing a ribbon cutting and block party this Friday, the 18th! They will be performing demonstrations of the permeable pavement and rain gardens so you can see how it works managing stormwater onsite. We look forward to seeing you there!Read More
A summary of the green infrastructure tour of the University of California Berkeley (UCB) campus hosted by the ASCE SF Chapter's Sustainability Committee. The tour covered a variety of stormwater best management practices, including rain gardens, pervious concrete, and greywater systems. The tour even got to check in on the Melvin Calvin Lab pervious concrete walkway Bay Area Pervious Concrete installed back in 2013.Read More
Wouldn't it be nice to make better use of all the rain we have received this winter, by restoring our groundwater and aquifers, rather then just sending it to the bay or ocean? On Thursday, March 23rd, you can learn how to utilize your stormwater as a resource, rather than it being a nuisance, using Best Management Practices like, pervious concrete and dry wells.
Our partners at the Resource Conservation District of Santa Cruz County are hosting a free half day stormwater workshop, in which Bay Area Pervious Concrete will be providing an educational presentation and site tour. BAPC will explain how to design with pervious concrete using LATIS (Large Area Thin Infiltration System) and the latest specifications, to maximize stormwater capture while reducing project cost, and how to maintain it. Afterwards attendees will be able to take a short tour of two different pervious concrete installations, allowing for a comparison examination in order to see how much the design and specifications affect the outcome and long term maintenance.
The workshop is free, but space is limited - Register Here.
What makes a good pervious concrete specification? This article explains how keeping your specifications up-to-date will allow you to promote good practices, have better performance, and protect you should there be any problems.Read More
Want to learn why pervious concrete is the most cost effective stormwater BMP? Bay Area Pervious Concrete's David Liguori will be providing a series of informational presentations in February and March. By attending the following events you will learn how a pervious concrete stormwater system can simplify your site designs, decrease project costs, while complying with municipal stormwater regulations.
Planning with Pervious Concrete
February 3rd, 11:45am-1:00pm
APWA-Sacramento Chapter Luncheon
Dante Club, 2330 Fair Oaks Boulevard, Sacramento , CA , 95825
Pervious concrete stormwater management systems, which operate according to a principle known as LATIS, or Large Area Thin Infiltration Systems, are considerably more effective and less costly than other BMPs when designed appropriately. A 180° departure from conventional design, LATIS requires a major re-think. This presentation illustrates this new design approach and walks participants through the building of a system model to reduce overall project costs, while complying with regulations. Register here.
PERVIOUS CONCRETE 2.0: Beyond the Basics
March 8th, 11:45am-1:00pm
East Bay Municipal Engineers Lunch Meeting
Legends at Diablo Creek, 4050 Port Chicago Hwy, Concord, CA 94520
Have you attended the introductory presentation and feel like you know enough to be dangerous? Take it to the next level and join us while we dive deeper into the details of designing and specifying a Pervious Concrete water management system based on LATIS ( Large Area Thin Infiltration System). We will go through the latest specifications released in the fall of 2016, take apart several designs, study various details, cover base and subgrade prep as well as the finer aspects of infiltration.
This presentation will give you what you need to put pen to paper and supercharge, by simplifying, your site design. Register here.
Can’t make it to one of these events? Have your organization’s lunch and learn coordinator contact us to schedule a presentation at your office.
Santa Cruz County is providing a tour of five of its recent low-impact development projects. At each stop on the tour you will be able to gain insights from the project managers, engineers, architects and contractors that worked on the projects. In addition, the tour features Bay Area Pervious Concrete's installation at Heart of Soquel Park. David Liguori will be at the Heart of Soquel Park tour stop to talk about the pervious concrete courtyard and parking lot we installed at the park in 2015.Read More
David Liguori recently presented in front of a packed house at the American Public Works Association, Northern California Chapter's 2016 conference. With nearly 70 public works and civil engineers filling the pervious concrete session of the two day conference there were not enough chairs to go around.Read More
A big portion of our efforts at BAPC is in education. We love those days when we get to leave the office and engage with others to build more understanding around pervious concrete. We always look forward to meeting new people, having great conversations, and exhibiting the benefits of pervious concrete. The more people we meet the more love for pervious concrete is spread. Check out some of the events we will be at this year!Read More
Over the past few weeks we have seen the internet explode with interest over the recently announced Topmix Permeable concrete from Tarmac Lafarge in the UK. People are marveling over concrete that allows water to not only go through it, and back into the ground, but at an incredible rate. The video we featured on our last blog post is impressive and demonstrated just how fast. We were excited to see so much interest in pervious concrete by so many different people. However, we did notice some discrepancies in the way that pervious concrete was discussed in some of the media outlets, and we wanted to take some time to clarify a couple things.
Some of the media outlets portrayed pervious concrete as a new product that was not available in the United States - which is false. Pervious concrete has been used for stormwater management throughout the US for over 40 years. What's different, or innovative, about Tarmac's Topmix Permeable concrete is it boasts a whopping 35% air void space, which is why it infiltrates at such a high rate. Tarmac representatives have stated in interviews that the product has some limitations on where, and when, it should be used. They are not recommending Topmix Permeable for high-traffic areas, in places where vehicles make lots of tight turns, or in places with freeze-thaw cycles, as it will eventually start breaking up the surface layer. Some media corespondents have portrayed that all pervious concrete had these limitations - which is also false. While Topmix Permeable may have these limitations, more traditional pervious concrete does not share the same limitations. In the US, mix designs have evolved and have already solved the issues of heavy traffic, weight loads, turning vehicle traffic, and freeze/thaw cycles.
Through trial and error the pervious concrete industry has discovered that 20% air void space provides the proper balance between strength, durability, and high infiltration rates. The additional bonds provided by only having 20% air voids, allows for a stronger, longer-lasting material, with just as much infiltration capacity to mitigate all of a site's stormwater.
Want to see how pervious concrete works, all the many forms it can take, or have a question you would like answered? Are you skeptical about just how permeable pervious concrete is? We'll have a working model to show you just how pervious it is! Come visit us at booth #419 during the Northern California Facilities Expo in Santa Clara, Sept 23-24! Tickets can be purchased here.
We are looking forward to seeing you there!
David Liguori will again be attending the Bunyan Springs Pervious Concrete Roast in Nevada in earlyOctober. The Roast features industry leaders providing informational talks and demonstrations in the many areas of Pervious Concrete, promoting the latest research and product developments.
Past roasts focused on the following topics:
- Pervious stormwater system design.
- Silt catchers and inflow challenges.
- Filter fabric versus the choker course.
- Decorative products.
- Repair products.
- Batching pozzolans and fibers.
- Deicing salts.
- Alternative aggregates of rubber and glass
David will be providing an informational session on Super Absorbent Polymers (SAPs) and how they can improve the admixtures for pervious concrete. SAPs provide lots of benefits, join David at The Roast to hear all of them - you'll never again specify another project with pervious concrete without them! Sign up for the Roast here.
In keeping with the Pervious In Paradise look back, we have Dr. Narayanan Neithalath Ph.D. P.E.’s presentation of pervious concrete modeling featuring one of my favorite parts- a clip of a pervious cylinder in a CAT scan!
Dr. Neithalath’s presentation was on his research on the effect of mix design on pore structure and infiltration performance. Currently, the state of the art is rife with trial and error which ends up, at worse, with pavement failures, and best, an inconsistent mix. He wants to really understand how different aspects of the pervious concrete mix affect the different performance attributes. In this way, he wants to be able to dial in a pervious mix, with the exact attributes required for the ideal functioning of the installation.
The key feature of pervious concrete is the porosity, which we are all familiar with. Permeability is linearly related to porosity, and while that is obvious, it forms a helpful and fundamental baseline for one aspect of pervious concrete as a hardscape. Other aspects of pervious concrete are less well understood and they include types and seriousness of particle retention or clogging; oil retention, as some are considering pervious concrete as a bio-filter; strength and fracture, for structural considerations; as well as how mix design informs the size, type and structure of the voids. Dr. Neithalath is working to understand how all of these factors come together to form computational performance models for consistent designable pavements. In turn that would create a matrix of variable that could be controlled to create very precise mix designs for producers and installers.
My favorite part of Dr. Neithalath’s presentation was the video he presented of a pervious concrete cylinder in a CATscan, going all the way throughout, such that the void patterns were completely observable. Below you can see the video. I found the whole thing hypnotizing. What do you think?
To see more about Dr. Neithalath’s work, you can go to his faculty page here.
Pervious in Paradise was a great conference. There were great presentations, solid attendance and wonderful networking! And every night, FIREWORKS!! Well, those might have been for the SeaWorld guests, who were adjacent to the conference site, but we enjoyed it nonetheless!
As we get materials and permission, we will be posting briefs on a few of the presentations. There were some fantastic new ideas, ongoing development of existing ideas and industry knowledge getting more refined. Highlights included
- pervious concrete site and pavement design with Michael Hein P.E. and Chris Estes, ASLA,
- notes from the Puget Sound with Andrew Marks P.E.,
- some truly innovative applications of pervious concrete with Muhannad Suleiman, Ph.D.,
- great modeling of voids and their implication with Narayanan Neithalath, Ph.D. P.E.
- discussions of fibers and silica fume with John Kevern Ph.D. P.E. LEED AP
There were many good speakers, and solid content throughout. More soon, and we are already looking forward to the next conference! Did you go? What did you think? Your comments are always appreciated!
It is time again for the most glorious of the pervious concrete conferences - The NPCPA Pervious in Paradise! It is where many of the pervious concrete thinkers and doers get together to exchange ideas and enjoy a new beautiful location - this time in San Diego.
We are looking forward to it particularly as BAPC’s David Liguori will be discussing reinforced pervious concrete and how rebar is not ever an appropriate reinforcement technique for pervious concrete. You can see more of the speakers here. We invite you to join us > Click here to register!
To get you all more excited about the conference we have some of the photos from the last Pervious In Paradise here!
This was originally posted June 19, 2013.
Lauren Wray, our Director of Marketing, attended the USGBC’s Greener Builder Conference last week. Apparently the Greener Builder Conference is even GREENER then the Green Builder Conference that occurred in November! This conference did not disappoint. From the opening panel, pictured below, featuring Jeffrey A. Birdwell, Michael Deane, Kevin Hydes, Kirsten Ritchie and moderated by Cliff Brewis, the focus was on leading edge sustainability, and strategies to get regenerative planning and innovation into the building industry.
There were good options for every panel, but as pervious concrete sub-contractors, we went to the subcontractor panel, hosted by John Home and Jeff Swinyer of Rudolph and Sletten, pictured below.
Lauren, pictured below, was interested in the drive toward clear performance specs to allow for differentiation at the sub-contractor level. As a pervious concrete subcontractor, we differentiate ourselves with our embrace of leading edge technologies for mix design and installation. Unfortunately, many current specs don’t reflect the progress in the installation, mix designs, equipment and curing materials that has developed in the last few years.
The next panel we attended discussed Environmental Product Disclosures (EPDs), a labeling system that discloses the resource footprint of the many materials that go into the built environment. The panel also included the next iteration, the Health Product Disclosures, which discloses the materials and chemicals that have been proven or correlated in causing health problems for humans.
Central Concrete, a sponsor of the event, has been heavily involved in the EPD project for disclosing the materials for the concrete industry. Below is a photo of the panelists from this panel.
The last panel of the day went over Net Zero Energy buildings with John Andary and Scott Shell, pictured below. It was a fascinating look at what is currently possible with technologies now: buildings that use as much energy as they make. The building case studies discussed also illustrated how livable and workable these spaces were, with thought for passive heating and cooling. Many of the designs features windows that bounced daylight far into the building envelope, as well as fresh air ventilation. It was a wonderful talk, even though their topics stayed primarily inside the building envelope.
The final speaker, Jason McLennan, pictured below, gave a wonderful talk on self limits. His talk really stood out for his candor and optimism. For a young guy, has accomplished quite a bit in the green building spaces. Currently he is pioneering the Living Building movement.
After his talk, Jason McLennan was joined by George Salah, of Google, and David Gottfried of the USGBC. They discussed everything from George’s living-building home construction project to Jason’s motivation to do the work that he does: “I give a shit.” That was wonderful.
FInally, after it was all over, we found that there was a fantastic array of beers, wine and snacks to round out the day’s networking. It was a great event, and one we will look forward to attending next year!
A BIG thank you to Charlie Nucci, who took these photos at the event. You can find more about Charlie and his work at his website here.
David teaches the NRMCA Pervious Concrete Technician class by the NRMCA local sponsoring group ACI Northern California chapter. The class location was in Truckee, CA and after the class and test, the class went out the TNT Materials Yard for a demonstration pour. We had good pervious pouring weather and great participation! If you would like more information for upcoming NRMCA pervious concrete training classes, go to the ACI website here: www.ACI-NCAWNV.org.
Check out the photos below: