High strength and self adhesive waterproof sheet layer extends. Cold, liquidapplied elastomeric deck coating and membrane systems are widely used for waterproofing concrete structures. Replacement of this membrane can be very expensive and often overlooked when buying a. Cost effective prevention of reflective cracking in composite pavements a thesis submitted to graduate faculty of the louisiana state university and. Development of the strategy to select optimum reflective. Innovative high strength, waterproof sheet layer designed to extend the life of pavements and asphalt wearing courses by protecting surfaces against reflective cracking. This highly flexible layer significantly retards reflective cracks of joints in. Cracking in asphalt pavements cracks occur in flexible asphalt pavements for a wide variety of reasons.
Waterproofing membrane membrane systems that protect your flooring investment strataflex is a 40 mil approx. The strata interlayer significantly delays reflective cracking keeping the entire pavement structure. Since wisdot typically performs crack maintenance beginning. Stress absorbing membrane interlayer and high strain asphalt crack relief interlayer strata. A stochastic optimization approach for the selection of.
Other cracks, such as reflective cracks in cementstabilized pavement bases, are mainly cosmetic in nature. Temperature changes cause the slabs to contract and expand, causing horizontal movements at the joints. Therefore, the study was focused on reflective cracking mitigation techniques for the hma overlays over old asphalt pavements. Strataflex features a 2 double stick lap joint that creates a watertight seal for superior waterproof protection and provides up to 38 crack isolation protection. Reflective cracking performance of strata sections 1 and 3 and the control. Should this factor be overlooked, you could find yourself dealing with unwelcome water leaks and other building defects that are commonly caused by poor or nonexistent waterproofing. Paveprep is a heavy duty, high strength pavement repair geo composite membrane used to reinforce and waterproof pavement cracks and joints, reduce reflective cracking of asphalt concrete overlays, and as heavy duty bridge deck water proofing membrane.
Tabbara 2 1undergraduate research assistant, department of civil engineering, lebanese american university, byblos, email. Controlling reflection cracking in hma overlays of pcc pavement gary l. Reflective cracking and cold, liquid applied elastomeric deck. Aug 29, 20 a reflective roof membrane has the capability to reflect the suns uv and infrared rays away from the building, allowing the roof temperature to increase only by 12 o f which is much lower than the 78 o f increase from the traditional black roof. Because reflective cracking is not immediate, many agencies struggle to understand this complex pavement problem. With a lower temperature increase of the cooler roof is a reduced heat transferred to the insides. Distribution statement strata, reflective cracking, reflective crack relief, interlayer, stress distribution unlimited absorbing membrane authorized for public release 19. Paveprep is composed of a flexible, high density asphalt mastic bitumen between a top layer of. In the thinset installation, a crack isolation membrane is bonded to the concrete.
Arkemaroad science strata reflective crack relief interlayer. Joint reflective cracking on a lowuse industrial road. Pavement stress relief and waterproofing membrane shall be comprised of a selfadhering rubberized asphalt and durable polypropylene nonwoven fabric peel and stick. Mechanisms of single reflective cracking the opening and closing of the joint or crack and temperature variations caused thermal stress and induces cracking initiation. The antireflective cracking membrane forms a waterproof surface that. It may take two to four years for 100 percent of the reflective cracks to reappear, and then another two to four years for the resulting water damage to force pavement repair or replacement. Petrotac is a waterproofing membrane that effectively seals pavement joints, cracks and repaired potholes, as well as bridge decks. Mitigation strategies for reflection cracking in rehabilitated. Strataflex features a 2 double stick lap joint that creates a watertight seal providing. Replacement of this membrane can be very expensive and often overlooked when buying a strata condo. Paveprep is a high density joint sealing membrane manufactured by the paveprep. Field engineer asphalt institute san antonio, texas. Some cracks are indicative of failure in the pavement, such as fatigue cracking, thermal cracking, or cracking due to base failure. This type of cracking can be easily avoided in the tile layer either by installing the tile on a mortar bed set over a cleavage membrane method f111 for example, or by installing the tile over a crack isolation membrane using a thinset method.
I know some ways to make it better but not how to completely eliminate it. There are a handful of reflecting cracking mitigation techniques for the overlays over portland cement concrete pcc pavements such. The strata interlayer significantly delays reflective cracking keeping the entire pavement structure in good condition and the traveling public happy. Reflective cracking relief interlayer for composite pavements. Research engineer texas transportation institute report 045173 project 04517 project title. To achieve this objective, a survey of current state practices identified the treatment methods used to delay and mitigate reflective cracking in composite pavements. Forming a high strength waterproof layer that reduces moisture into the sub base and spreads loadings on road surfaces to extend the longevity of road pavements. Effects of an asphalt rubber membrane interlayer on pavement. Controlling reflection cracking in hma overlays of pcc. In addition, there were an insufficient number of projects for paving fabrics to allow for drawing conclusions on the costeffectiveness of this treatment method.
Techniques for mitigation of reflective cracking on hma airfield pavements tpf5146. Cost effective prevention of reflective cracking of. The study concluded that the sand mix interlayer system extended the service life of the hma overlay regarding reflective cracking due to its relatively high fracture energy. Pdf mitigation strategies for reflection cracking in. Key words reflective cracking, rehabilitation, saw and. It functions by creating a moisture barrier between the old asphalt layer and the overlay, decreasing introduction of water into the base, reducing the effects of reflective cracking and.
Strataflex is a premium waterproofing membrane for surfaces. Develop statewide recommendations for application of pcc joint reflective. Design and evaluation of hot mix asphalt hma mixtures used. Strata, reflective cracking, reflective crack relief, interlayer, stress. The internal makeup of this membrane is such that movement in the concrete is not directly transferred to the tile. Houston builtup roofing, also known as bur, has evolved from hot tar roofing that was commonly used as a method for installing roofs more than 150 years ago. A reflective roof membrane has the capability to reflect the suns uv and infrared rays away from the building, allowing the roof temperature to increase only by 12 o f which is much lower than the 78 o f increase from the traditional black roof. Paveprep is a stressrelief interlayer which is used in overlay applications to control reflective cracking. The anti reflective cracking membrane forms a waterproof surface that. Reflective cracking is a result of horizontal and vertical movements at the joints and cracks in the underlying pcc. There are a handful of reflecting cracking mitigation techniques for the overlays over portland cement concrete pcc pavements such as sawcut sealant which are not in the scope of this study. The petrotac membrane also forms a stressrelieving interlayer beneath the pavement overlay, retarding reflective cracking and resisting fatigue cracking.
Gripset elastoproof arc antireflective cracking membrane 20m. Reflective crack mitigation guide for flexible pavements final report. Evaluation of strata reflective crack relief system wisconsin dot. The cracks occur directly over the underlying rigid pavement joints. Oct 31, 2019 arkemaroad science strata reflective crack relief interlayer. To halt or retard reflective cracking objective the objective of this experimental feature is to evaluate a product called paveprep. Strata consists of a polymerrich dense fine aggregate mixture layer that is placed on top of the deteriorated pavement and is then overlaid with hma. Durable and reliably waterproof, bur is a watertight membrane made up of layers of bitumen petroleum mixture. Final report aaptp 0504 techniques for mitigation of. Typically these systems are liquidapplied in relatively thin mil thicknesses, bonded continuously to the substrate, and cured to a seamless elastomeric barrier for waterproofing protection. Strataflex is a high strength, selfbonding, elastomeric sheet applied membrane designed for use under interior or exterior floor surfaces that require waterproof protection. If you are looking to purchase a block of units for commercial or investment purposes, be sure to check out its waterproofing history.
Strata parkades are typically protected by an membrane covering the concrete superstructure. Reflective cracking the tile council of north america. Reflective cracking of flexible pavements phase i and ii. The elastoproof antireflective cracking membrane is an innovative high strength waterproof sheet layer designed to extend the life of pavements and asphalt wearing courses by protecting surfaces against reflective cracking. Controlling reflection cracking in hma overlays of pcc pavement. Strataflex waterproofing membrane nac products crack. In this connection, interlayer systems such as paving fabrics have been suggested to enhance the resistance against reflective cracking 789101112 and to reduce the permeability of. The evidence that the cracks were occurring from the top down indicated that the stress absorbing membrane layer was performing as intended, but the wearing course was not flexible enough to bend at the same rate that the stress absorbing membrane layer was able to flex. Durable and reliably waterproof, bur is a watertight membrane made up of layers of bitumen petroleum mixture alternating with layers of fabric with reinforcements. Why is it important to have a reflective roof membrane. Evaluation of modified performance grade binders in thin lift maintenance mixes, surface mix and a reflective crack relief layer mix. Reflective c racking m echanism every time a layer of hot mix asphalt hma is placed on top.
By the third year, the test sections with a strata interlayer performed comparably to those without an interlayer. Traditional modeling approaches have not provided a direct means for the study of crack initiation. Reflective cracking july 2012 ive been working with asphalt for 30plus years, and there is one problem that i still do not know how to fix. Should this factor be overlooked, you could find yourself dealing with unwelcome water leaks and other building defects that are. Waterproofing issues in strata units titan waterproofing. Effect of pcc joint skew on reflective cracking in hma overlays by ziad g. Strataflex features a 2 double stick lap joint that creates a watertight seal and is the ultimate solution for applications. Pdf mitigation strategies for reflection cracking in rehabilitated.
Strata is a specialized high polymer, fine and densely graded hma mix typically applied through conventional paving equipment, followed by a typical hma mix. Techniques for mitigation of reflective cracks applied research associations, inc. Technical guide aaptp 0504 techniques for mitigation of. The elastoproof anti reflective cracking membrane is an innovative high strength waterproof sheet layer designed to extend the life of pavements and asphalt wearing courses by protecting surfaces against reflective cracking. Joint reflection cracking does not include reflection cracks that occur away from an underlying joint or from any other type of base e. A macrocrack level of reflective cracking was initiated in the wearing course in the hma, socalled crack jumping. Effects of an asphalt rubber membrane interlayer on pavement reflective cracking performance article in journal of materials in civil engineering 2512. Trb webinar mechanisms and mitigation strategies for reflective.
Reflective and thermal cracking modeling of asphalt concrete. Tile is bonded with thinset to the surface of the membrane. Reflection cracking is a serious challenge associated with pavement rehabilitation. Cost effective prevention of reflective cracking in composite. Sep 10, 2016 strata parkades are typically protected by an membrane covering the concrete superstructure. Houston built up bur roofing strata roofing and construction. The utah dot specifies a reflective cracking relief bituminous mixture which meets the general requirements specified for an hma mixture except the mix is designed to a target air void of 0. The strata reflective crack relief system was able to delay reflective cracking for two years.
A breathable membrane is placed on the outside of your insulation to ensure that any moisture that has managed to work its way into your insulation can escape before being able to cause condensation. The breather membrane also acts as a barrier to stop rain from getting into your house. As indicated by the manufacturer and owner of this technology semmaterials, the use of the strata system delays the appearance of. Pavement membrane for reflective cracking and waterproofing construction specification materials. Mitigation strategies for reflective cracking in pavements. Final report for aaptp 0504 20 february 2009 techniques for mitigation of reflective cracks applied research associates, inc. An asphalt overlay geotextile, or paving fabric, is designed to hold asphaltic cement tack coat and withstand the extreme temperatures associated with paving. Pavement membrane for reflective cracking and waterproofing. Road sciences strata is a high polymer, fine, densely graded hma mix interlayer which significantly delays reflective cracking in the concrete pavement.
Reflective cracking moving hma from a maintenance treatment. Cost effective prevention of reflective cracking in. Joint reflection cracking washington asphalt pavement. Strata consists of a polymerrich dense fine aggregate mixture layer that is.
562 709 1048 352 1106 498 1446 547 7 960 520 50 1519 155 49 1183 1386 388 51 1625 1102 978 324 672 1632 1329 857 355 521 1132 952 1214 37 978 427 238 77 156 1344 888 185 1224 1367 1016