Surface Tech invites you to attend this Webinar showcasing the improvement in asphalt pavement sustainability through the use of available emerging technologies and balanced mix design implementation. Attendees will learn how Surface Tech’s pavement solutions can help achieve better sustainability of asphalt pavements by increasing the amount of recycled materials being utilized while still delivering a better balanced field performance between cracking and rutting thus extending the service life of any new pavement, reducing the cost of downstream maintenance and lowering CO2 emissions.
Surface Tech invites you to attend this Webinar showcasing the latest asphalt plant mix technologies that will greatly improve the crack and rut performance of any asphalt mix design. Dario Alvarez of Surface Tech and Phil Blankenship of Blankenship Asphalt Tech & Training will be presenting innovations with aramid reinforced asphalt solutions.
The date for this webinar has been changed. Please check out our other “upcoming events” to see the next dates and topics. Thank you.
Surface Tech invites you to attend this Webinar showcasing the latest asphalt plant mix technologies that will greatly improve the crack and rut performance of any asphalt mix design. Joe Dennis of Surface Tech and Phil Blankenship of Blankenship Asphalt Tech & Training will be presenting innovations with aramid reinforced asphalt solutions.
This Webinar – #3 in a three-part series – will be delivered by Surface Tech and moderated Phil Blankenship of Blankenship Asphalt Tech & Training. Focus is on plant production using the ACE XP Polymer Fiber and ARMI reflective crack interlayer products. The discussion will include plant set up, necessary equipment available from Surface Tech for plant blending of the Aramid fibers, plant training and certification and how producers can make more money when embracing these technologies. Lastly, Phil will walk through the newest crack testing procedures for running IDEAL CT crack tests in the typical plant materials lab.
This Webinar – #2 in a three-part series – will focus on balancing mix design with two main performance tests, IDEAL CT for crack resistance and Hamburg Wheel Tracker for rut resistance using innovations such as ACE XP Polymer Fiber for asphalt reinforcement and ARMI reflective crack interlayer that will help the industry achieve a better balance between cracking and rutting performance moving forward.
The first of a three-part Webinar series presented by Surface Tech focusing on making our roadways better through understanding, testing and innovation. Phil Blankenship of Blankenship Asphalt Tech & Training and will focus on where our asphalt mix designs have come from to where they need to go for improvement.
Get answers you can count on with the new Asphalt Annualized Lifecycle Calculator
Two important factors come into play in the design of any asphalt mix: Initial Cost and the Projected Years of Life. Engineers, contractors and pavers all wrestle with decisions on which mix will yield the longest pavement life for the best value in dollars spent. To aid in this endeavor, engineers use an equivalent annualized cost approach called Life Cycle Cost Analysis (LCCA), to aid in the decision.
Phil Blankenship, P.E., has combined his years of experience in the asphalt industry with a wide range of documented results from studies of asphalt pavement to create the Asphalt Annualized Lifecycle Calculator, an online tool that can help determine both lifespan and payoff time frames.
“Tools like this are important to use, because they can evaluate various mixes and lengths of time to see how they compare,” said Blankenship, an independent industry consultant who also serves on the Surface Tech Advisory Committee.
One critical feature of the new calculator is its ability to compute results in terms of today’s dollars (net present value), an important capability to evaluate the time value of the pavement investment . The calculator allows a user to compare several mixtures and combine each with various additives to see how the estimated value of the mixture will compare in cost to a standard.. The current estimated life of US pavement surfaces averages about nine years before needing replacement. Additionally, the calculator takes into account the salvage value of the pavement to produce results that compare equally across various mix designs in terms of cost.
“The objective for this calculator was to achieve an apples-to-apples comparison,” said Blankenship.
With construction costs rising, it becomes ever more critical to seek out new ways to predict return on investment (ROI). This new calculator shows you what can happen when you test various mixes against their projected lifespans. In short, it’s a try-before-you-buy tool that can save you both money and buy you time.
A custom asphalt mix design utilizing ACE XP polymer fibers has given a general aviation airport the long-term solution it sought for a nagging pavement cracking problem. Initial results show the custom design, which combined both a binder layer and a surface layer reinforced with ACE XP, will exceed expectations by greatly reducing cracking potential.
The six-year-old runway pavement at Taylor County Airport in Kentucky was failing. Airport authorities called on Palmer Engineering to provide a desperately needed 15-year-plus solution to the pavement’s micro-cracking problem. Working with Haydon Materials, the team turned to an expert with long-standing experience in designing crack-resistant asphalt pavements.
“The airport authorities were concerned that numerous cracks in the existing pavement could lead to failure, a common failure in airport pavements as aging occurs can create FOD — Flying Object Debris — causing a danger to the aircraft and potentially the traveling public.”
No milling was done on the runway pavement prior to re-paving. This meant the existing cracks would be exposed to the bottom of the binder layer and would ultimately reflect upward through the new pavement. The solution called for an inordinately crack resistant and resilient binder layer that either needed to be custom-designed, or an expensive two-dimensional geosynthetic rolled interlayer product.
“As a member of Surface-Tech’s Technical Advisory Committee, Phil is well versed on the capabilities of ACE XP, and he set about designing a completely new binder layer asphalt mix using it.”
Blankenship was able to deliver a design that Haydon could produce in its plant and pave with existing paving equipment. Using ACE XP in the new binder layer design gave Haydon Materials an effective crack resistant solution, while maintaining cost control for this demanding application.
The customized ACE XP mix achieved a new level of flexibility for the binder layer. The new binder layer design — a finely graded, highly asphalted crack resistant mixture — greatly reduced the potential for cracks to reflect upward from the base through the new pavement.
An ACE XP reinforced surface mix was also designed utilizing a higher-than-normal asphalt content to provide even greater crack resistance than a typical FAA asphalt mix design,
“The development of this unique combination of mix designs for the binder and surface layer is an exciting advancement for the paving industry that holds great promise for dramatically improving crack prevention,” said Dennis.
“With this new approach, contractors can also control the quality in both production and installation, as the new mix design is simply incorporated into the contractor’s production processes, thus eliminating third party contractors to install the 2-dimentional geosynthetic rolled interlayer product.”
For more information on ACE XP crack resistant designs, contact us.
ACE XP shows 30% to 50% improvements in both tests
Asphalt pavements need to be stiff enough to minimize rutting, but resilient enough to bend without breaking to prevent cracking. The trend over the last 20 years has been one-sided — fixing the ruts at the expense of the cracks. Many in the industry have begun to recognize the need for a “balanced approach” to developing pavement designs that will perform well in resisting both rutting and cracking.
There are seven key existing performance or index tests for asphalt cracking (see Table 1). These tests vary in complexity and cost, and as a result, the asphalt industry has not traditionally performed cracking performance tests on every project.
For rut testing, the Hamburg Wheel Tracker (HWT) test tends to be the most widely used method. However, many agencies and specifiers, including DOTs, are moving toward adopting performance-based specifications where both mix designs and daily production will need to meet certain minimums in both cracking and rutting parameters in order to be considered.
A new and promising cracking test has recently been developed by Dr. Fujie Zhou and his colleagues at the Texas A&M Transportation Institute. The Indirect Tensile Cracking Test at Intermediate Temperature (IDEAL-CT) is a reduced cost method that provides consistent results to predict field performance in cracking. This test, along with HWT, can be used daily to ensure that asphalt mixes meet both rutting and cracking performance criteria in a balanced manner.
For example, tests utilizing the HWT and IDEAL-CT methods on ACE XP asphalt mixes can be seen in Figures 1 & 2. The results compare mixes with and without ACE XP and show clear performance advantages with ACE XP in both rutting and cracking sample results.
Bottom line: In balanced performance testing, ACE XP Polymer Fiber yields an improvement of 30% to 50% in both rutting and cracking performance. To learn more about ACE XP or how to achieve a balanced approach to testing using the IDEAL-CT method, contact us.