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Blackfeather Trail ACE Fiber Thin Lift Repave

Introduction Challenge Solution Installation Results Gallery The Nilex Advantage

ACE Fiber brings strength, crack resistance and longer life to a busy asphalt-paved road.

Blackfeather Trail is a busy asphalt-paved road in Castle Rock, Colorado. This high level of traffic has led to reflective and fatigue cracking. When faced with repaving this section of the road, which sees both commercial and residential traffic, the Town sought innovative solutions that would work with a thin lift repave.


Castle Rock, Colorado



Project Partners

Owner: Town of Castle Rock
Contractor: PLM Asphalt & Concrete, Inc., Kiewit Infrastructure
Completion Date: June 2017


A lift of approximately 1.5 inches (38 mm) means the new asphalt will be subjected to stress from above and below. A history of cracking emphasizes the need to address this situation. Polymer asphalt modifiers and pavement grids can be costly ways to combat cracking. The location of this section of road, near a high school and recreation centre, means high traffic volumes are certain to continue, including a large number of buses. High volumes also translate to driver frustration during maintenance closures.


As a company built on innovation and an understanding of customer needs, Nilex introduced the ACE Fiber roadway solution in 2016. ACE Fiber combines Aramid micro-fibers and Sasobit wax to create a three-dimensional reinforcement solution uniquely suited to the high temperatures found in Hot Mix Asphalt (HMA). Aramid provides 400,000 psi tensile strength that combats rutting from loads under summer heat and winter expansion/contraction cracking. ACE Fiber can be installed by any HMA contractor, and is easily added by vacuum line directly at the HMA plant. Over 18 million Aramid fibers are dispersed in each ton of HMA.


For the plant operator, the only difference in HMA creation for this job was the measuring and addition of ACE Fiber, using a vacuum line, at Kiewit’s nearby asphalt plant. Once on site, crews experienced no changes to the usual procedures for a non-reinforced installation.

The day-long paving job included four hours for the ACE Fiber section, and required a typical crew of 10 using the same equipment they use for other HMA installations.


For the owner, ACE Fiber proved a cost-effective means of reducing cracks and future repair work for a thin-lift Hot Mix Asphalt section of pavement in Castle Rock, Colorado. The town’s ACE Fiber installation was observed by other municipalities facing similar climactic condition and user demands on their road networks.


The Nilex Advantage

Nilex is committed to unearthing better results. Whether it’s for a civil, resource or environmental project, we offer the latest engineered and technically superior materials and techniques to save our customers time and money, and minimize the need to move or remove earth, and reduce the need for granular materials.

With over 35 years experience, a long-standing commitment to the environment and highly qualified staff, Nilex delivers the products and technologies that give clients an economic advantage with environmental benefit.

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