Asphalt warm mixing agent, preparation method and application
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A warm mix agent and asphalt technology, applied in climate change adaptation, building thermal insulation materials, building components, etc., can solve the problems of restricting the popularization and application of warm mix agents, less development and research, etc., and achieve great practical significance and economical, raw materials. Easy to get, low dosage effect
Active Publication Date: 2018-07-03
CHANGAN UNIV +1
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Abstract
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Problems solved by technology
Although road workers at home and abroad have conducted many research projects on this type of asphalt warm mix technology and achieved rich results, most of them are applied research, and there are few researches on the development of its key technology—surfactant-type warm mix agent products, which restricts The further popularization and application of this type of warm mix agent
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Embodiment 1
[0023] The components and quality of asphalt warm mix agent are:
[0024]
[0025] The preparation method of asphalt warm mix agent of the present embodiment is divided into three steps:
[0026] The first step is that in a 500mL there-necked flask equipped with a stirrer, reflux condenser, water separator, and tail gas absorption device, the mixed acid of palmitic acid and oleic acid (palmitic acid and oleic acid mass ratio is 1:1), Xylene was sequentially added to the three-neck flask reactor.
[0027] The second step is to fill the three-necked flask with nitrogen, and under the protection of nitrogen, heat up to 100°C. After the acid is completely melted, add triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine and a catalyst, and slowly heat up to 155°C , Keep the temperature reaction for 4.5h.
[0028] The third step is to recover the xylene after the reaction is completely dehydrated to obtain a viscous liquid product, which is the product of the pre...
Embodiment 2
[0031] The components and quality of asphalt warm mix agent are:
[0032]
[0033] In this example, the fatty acid containing 16-18 carbons is palmitic acid. The catalyst is alumina.
[0034] Its preparation method is identical with embodiment 1.
Embodiment 3
[0036] The components and quality of asphalt warm mix agent are:
[0037]
[0038]
[0039] In this example, the fatty acid containing 16-18 carbons is oleic acid. The catalyst is sodium fluoride.
[0040] Its preparation method is identical with embodiment 1.
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Abstract
The invention relates to an asphalt warm mixing agent, a preparation method and application. The preparation method comprises the following steps: weighing the following components in percentage by weight: 30-49% of fatty acid containing 16-18 carbons, 20-30% of triethylene tetramine, 15-25% of tetraethylene pentamine, 5-20% of pentylene hexamine, 10-18% of a water carrying agent and 1-2% of a catalyst; adding the fatty acid containing 16-18 carbons and the water carrying agent into a reactor, heating until the fatty acid containing 16-18 carbons are melted, then adding the triethylene tetramine, tetraethylene pentamine, pentylene hexamine and catalyst, carrying out heat preservation for 4-6 hours at the temperature of 140-160 DEG C, and dehydrating, thus obtaining the asphalt warm mixingagent. The asphalt warm mixing agent provided by the invention does not contain water, is added in an asphalt internal doping way and has obvious advantages that addition amount is low, production andconstruction operation temperature of asphalt mixture is lowered by 30-40 DEG C after the asphalt warm mixing agent is added, raw materials are available, product cost is low, and the construction and maintenance of an asphalt pavement as well as energy conservation and discharge reduction can be realized.
Description
technical field [0001] The invention belongs to the technical field of asphalt additives for road construction, in particular to an asphalt warm mix agent and its preparation method and application. Background technique [0002] Warm asphalt mixing technology first originated in Europe. In 1995, SHELL (Shell) and Kolo Veidekke (Norway) first jointly developed warm mix asphalt mixture (WMA); in 1997, the German Asphalt Forum, the first International Asphalt Pavement Conference in Sydney in 2000 and the second Barcelona in 2000 At the European Asphalt Conference, warm mix asphalt mixtures were publicized and introduced on a large scale, and there was a trend of accelerated development; in 2002, the National Asphalt Pavement Association (NAPA) inspected warm mix asphalt in Europe (mainly Germany and Norway) The mixture subsequently aroused great interest in the relevant departments of the US government and the industry. In 2004, NAPA, the US Federal Highway Administration (FH...
Claims
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Application Information
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