Reflective crack relief interlayer

Hot mix asphalt hma applied over concrete pavements has always been a challenge as the joints of the concrete pavement cause cracking that quickly reflect upward through the new hma overlay to the surface. The remainder of this article will focus on an example of a highly strain absorbing, reflective crack relief interlayer rcri. Thick, high fracture energy interlayers delay reflective cracking onset, lessen crack severity, distribute offset cracks. Road sciences strata is a high polymer, fine, densely graded hma mix interlayer which significantly delays reflective cracking in the concrete pavement. Strata reflective crack relief system petersen asphalt research. Request pdf reflective cracking relief interlayer for composite pavements highly strain absorbing reflective crack relief interlayer rcri is used for the construction of composite pavements. Stress relief asphalt layer and reinforcing polyester grid as anti reflective cracking composite interlayer system in pavement rehabilitation january 2012 doi. A reflective crack relief system consisting of an impermeable, highly elastic interlayer that uses finegraded aggregates and a quality hma. Mirafi mpv nonwoven asphalt overlay fabric forms a membrane that minimizes surface water from penetrating pavement systems and provides a stress relief interlayer which inhibits the growth of reflective cracks. Reflective cracking is one of the major type of distresses associated with the use of asphalt concrete ac overlay for rehabilitating deteriorated. Crack relief layer crl is a layer that is placed between the new overlay and the old pavement in order to dissipate pavement movements before they create stress in a new overlay surface. Reflective crack relief interlayers petersen asphalt research.

The interlayer includes a polymer modified asphalt binder mixed with a dense fine aggregate mixture containing a substantial amount of manufactured sand. Reflective cracking relief interlayer for composite. Mitigation strategies for reflection cracking in rehabilitated. Test sections were constructed in racine county in 2001 and in st. Semmaterials brand is called the strata reflective crack relief interlayer. Reflective cracking relief interlayer for composite pavements by phil blankenship, p. Produced from polypropylene staple fibers, mirafi mpv is heatset to provide a waterproofing barrier.

Reflective crack relief asphalt interlayer blankenship. Evaluation of strata reflective crack relief system. This layer may be used as a stressrelief interlayer. The strata interlayer significantly delays reflective cracking keeping the entire pavement structure in good condition and the traveling public happy. Overlays are needed to protect the existing pavement structure and provide a new. Reflective crack relief asphalt interlayer blankenship asphalt. Effective in preventing reflective cracking, even in cold climates. A highly strain tolerant, substantially moisture impermeable, reflective crack relief interlayer is provided. Pavement smoothness and condition deteriorate rapidly as the cracks allow water to infiltrate the entire pavement structure, causing rapid degradation of the hma and voids that proliferate in the base below the concrete pavement. It is common to see all cracks reflect through the new overlay in three to five years.

Arkemaroad science strata reflective crack relief interlayer. Reflective cracking relief interlayer for composite pavements. The interlayer mix is designed using a fatigue test and a stability test. The cracks are commonly called, reflective cracks or reflective cracking as shown in figure 1. Reflective crack relief interlayer system advantages significantly delays reflective cracking improving surface protecting base impermeable lengthens service life recyclable. Pdf reflective cracking relief interlayer for asphalt pavement. Pdf reflective cracking is one of the major type of distresses associated with the use of asphalt concrete ac overlay for rehabilitating. A typical treatment for restoring deteriorating portland cement concrete pcc and asphalt concrete ac pavements is the use of hot mix asphalt hma overlays. Reflective cracks usually begin to appear in the new hma surface within one or two years depending on the thickness of the overlay 2. Arkemaroad science strata reflective crack relief interlayer arkemaarrmaz. Reflective crack relief pavement interlayer with improved. Interlayer and design considerations to retard reflective cracking. The strata interlayer significantly delays reflective cracking keeping the entire pavement structure in good. Reflection cracking is a serious challenge associated with pavement rehabilitation.