Mndot office of materials what is warm mix asphalt wma. Add a port to the asphalt cement line or weigh hopper to start making warm mix asphalt. An existing tank, such as one used for antistrip, can store bulk evotherm. Evotherm warm mix asphalt technology is an efficient way to reduce emissions and save energy in the asphalt paving industry. In conjunction with mead westvaco, telfer has chosen evotherm as our warm mix. Warm mix asphalt wma is a technology that has seen widespread growth in canada since its. Special mixture design considerations and methods for wma presentations. Figure 88 foam, evotherm, wax, and hma sections respectively in munster, in. Warm mix asphalt with rap national asphalt pavement. Warm mix asphalt wma is the name given to certain technologies that reduce the. Industry and agencies must work together to make it happen.
Evotherm technology in warm mix asphalt applications including typical paving. Warm mix asphalt wma emission reductions and energy. Evotherm is a new generation warm mix asphalt chemical additive which. In pavement industry, warm mix asphalt wma technologies provide a wide variety of environmental, technical, and economic benefits. The florida department of transportation began using warm mix asphalt wma on a trial basis in 2006. This study evaluates the potential of wma technologies and their integration with rap. Pdf warm mix asphalt wma represents the technologies that allow the. Prowell assistant director national center for asphalt technology. Muench civil and environmental engineering increased environmental awareness and stricter emissions regulations have led to a development of warm mix asphalt. Warm mix asphalt currently twenty two 22 technologies marketed and available in the us. Pdf an overview of the emerging warm mix asphalt technology.
Evotherm m1 can be added at the asphalt terminal or at the mix plant and is useful for producing warm mix asphalt based on all common formulation ingredients, including modified and unmodified asphalt binders, asphalt. The following warmmix asphalt wma additives and processes are preapproved for use on. The warm mix technology could reduce the temperature of asphalt rubber. Material producer list warm mix asphalt 2 november 20, 2019 warm mix asphalt. Warm mix asphalt in minnesota tim clyne mndot north dakota asphalt conference. Getting started with warm mix asphalt new york state. Evaluation of evotherm as a wma technology compaction and anti. Hurley and others published evaluation of evotherm for use in warm mix asphalt find, read and cite all the research you need on researchgate. Warm mix asphalt wma technology plays a significant role towards sustainable roadways by. Evaluation of warm mix asphalt technology for urban.
Warm asphalt mix emulsion, the precursor to wam foam in norway in 1996. The easy and ready to use formula provides comprehensive benefits that surpass conventional hot mix asphalt. We can also provide iso tainers or vendor managed inventory. Hurley research engineer national center for asphalt technology auburn university, auburn, alabama brian d. Warm mix asphalt technology is identified as an asphalt mix technology that allows a. Except for the inclusion of evotherm m1 in the wma, the materials and mix design for the hma and wma were identical. Prowell assistant director national center for asphalt technology auburn university, auburn, alabama sponsored by meadwestvaco asphalt. Using warm mix technology to improve applications of asphalt. Technology ncat, and the american association of state highway and.
Evotherm is a wma technology that offers exceptional advantages to asphalt contractors and roadbuilding engineers. Warm mix asphalt wma, manufactured at a lower temperature. Warm mix asphalt what is it and how can we benefit. Evaluating constructability and properties of warm mix asphalt. Evotherm 50 f plant foam 60 f lea 100 f sasobit 47 f change in grade hma control wma, o c. Easy to use evotherm promotes adhesion at lower temperatures by acting as both a liquid antistrip and a warm mix. This additive can be added to the binder at a rate. Asphalt warm mix colorado department of transportation. Asphalt mix that includes a technology which improves the production and placement of conventional asphalt mix at significantly lower. Evotherm is available in intermediate bulk storage units. Evotherm is easy to use, has proven performance across the globe, and saves money.
Among these technologies, the use of chemical additives which are liquid. Evaluation of evotherm for use in warm mix asphalt by graham c. Hypertherm was initially validated as an effective warm mix technology. Evotherm is a warm mix asphalt wma technology that offers exceptional advantages to asphalt contractors and roadbuilding engineers.
The latest third generation is 3g, which is a waterfree technology offering new advantages for innovative warm mix solutions. Study of surfactant additives for the manufacture of warm mix asphalt. A new technology involving asphalt cement modified with hypertherm was used to demonstrate that warm mix asphalt technology can be used to extend the paving season by facilitating paving in cold weather. At the time, warm mix was developed to help reduce energy consumption and stack emissions during production. Manual distress surveys from the fall of 20 show that. Technology that allows the reduction of mixing temperature by 20 to 100 f. Evaluation of potential processes for use in warm mix asphalt graham c. National center for asphalt technology ncat, national asphalt. Evotherm warm mix asphalt is one alternative to achieve that purpose in the asphalt paving industry. Introduction to evotherm warm mix asphalt technology slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Warm mix has allowed for longer haul distances, lower placement temperatures and improved. Warm mix asphalt for cold weather paving olof kristjansdottir chair of the supervisory committee. With the characteristics of evotherm warm mix asphalt technology introduced, the existing problem about hot mix asphalt technology applied on ultrathin pavement was put forward. Warm mix asphalt approval per the cdot field materials manual cp 59.
Reducing paving emissions using warm mix technology. Telfer pavement technologies, llc, in keeping with our environmental commitment, offers evotherm warm mix asphalt additive wma. Evotherm dispersed asphalt technology dat same chemistry as evotherm et chemical concentrate directly injected into asphalt line at plant dat concentrate delivered at 5% by asphalt weight. Description and typical applications asphalt evotherm warm mix. Fuel usage data were collected at three additional plants. Warm mix asphalt techniques evotherm in 2003, a company by the name of mead westvaco developed a new chemical additive called evotherm. Pdf on jan 1, 2019, andrew abah onoja and others published the effect of evotherm on hot mix asphalt find, read and cite all the research you need on researchgate. The evotherm mix did not cause any problems in the plant with the mixing process or with the handling of. Evaluation of evotherm as a wma technology compaction and. Services and paragon technical services, inc lake asphalt. Evotherm warm mix asphalt technology applied on ultrathin. Review of outstanding action items and negative vote. Wma includes a series of technologies to mix and compact asphalt mixtures at temperatures lower than the temperatures normally used in the production of hot mix asphalt mainly by reducing the viscosity of asphalt binders.
The authors thank the warm mix asphalt technology providers who furnished information for this publication. An overview of the emerging warm mix asphalt technology article pdf available in international journal of pavement engineering 151. But these three hallmark benefits are just part of the reason the evotherm family of products are recognized as the worlds leading warm mix asphalt wma technology. Drafter or producer of national highway specifications policy councilor of highway technology national test labs to evaluate pavement materials. Pdf evaluation of evotherm for use in warm mix asphalt. The latest napafhwa survey of asphalt producers use of recycled materials and warmmix asphalt find that nearly a quarter of all asphalt produced during the 2012 construction season was produced using warmmix asphalt. Its easytouse formula provides comprehensive benefits that surpass conventional hot mix asphalt. Evotherm warm mix asphalt telfer pavement technologies. Evotherm warm mix asphalt technology ingevity ingevity. The projects involved the placement of various asphalt.