CN102795812B - A kind of warm-mixed recycled asphalt mixture and preparation method thereof - Google Patents

A kind of warm-mixed recycled asphalt mixture and preparation method thereof Download PDF

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Publication number
CN102795812B
CN102795812B CN201110135693.1A CN201110135693A CN102795812B CN 102795812 B CN102795812 B CN 102795812B CN 201110135693 A CN201110135693 A CN 201110135693A CN 102795812 B CN102795812 B CN 102795812B
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warm
asphalt mixture
mix
pot
mixed recycled
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CN102795812A (en
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李志英
何唯平
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Heyuan sea Sichuan new Mstar Technology Ltd
Shenzhen Haichuan new materials Polytron Technologies Inc
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SHENZHEN OCEANPOWER NEW MATERIAL TECHNOLOGY Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/30Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a kind of warm-mixed recycled asphalt mixture, this warm-mixed recycled asphalt mixture includes: old asphalt mixture, Colophonium, newly gather materials, breeze, regenerative agent and warm-mixing agent;Warm-mixing agent be moisture content be 18%-23% inorganic silicon-aluminum hydrochlorate;It is in terms of 1 part by Colophonium parts by weight, old asphalt mixture 3-8 part, 5-28 part of newly gathering materials, breeze 0.3-1 part, regenerative agent 0.006-0.05 part, warm-mixing agent 0.06-0.12 part.Meanwhile, the invention discloses the preparation method of this warm-mixed recycled asphalt mixture, describe the order of addition of each material, the temperature of control and the time mixed and stirred in the method.The warm-mixed recycled asphalt mixture of the present invention well make use of waste asphalt and building stones, effectively reduce regeneration asphalt mixes and stirs temperature, decrease the discharge of toxic gas such as " glance coals " significantly, reduce the destruction to environment and the health hazard to workmen, and be easy to storage characteristics production.

Description

A kind of warm-mixed recycled asphalt mixture and preparation method thereof
[technical field]
The invention belongs to technical field of road engineering materials, relate to a kind of asphalt and preparation method thereof.
[background technology]
Reform and opening-up is over 30 years, highway in China development is rapid, as the infrastructural industries of national economy, the development of highway construction to Accelerating The Construction united market, realize effective distribution of resources, promote the coordinated development of all regions, improve open degree, promote the national economic development and social progress to play important function.After the peak period of highway construction, substantial amounts of highway will be faced with reconstruction and maintenance, at this moment will produce substantial amounts of old asphalt mixture, environment and soil will be caused the biggest pollution by these old asphalt mixtures, how to utilize these old asphalt mixtures of recovery will become one and study a question.
Waste asphalt mixture simply functionally decreases, and Colophonium is the most aging, and performance of gathering materials can also utilize.Therefore, by the recovery to waste asphalt mixture, adding suitable new Colophonium and newly gathering materials, heating uniform mixing can be made new asphalt completely and be applied to pavement structure.So solve waste asphalt mixture and pollute environment, it is also possible to save substantial amounts of building stones and petroleum resources, building stones, Colophonium resource reuse the meaning sent out during the sustainable development to China has very.
Regeneration mainly mixes the method such as hot recycling, cold in-plant recycling in bituminous paving original place hot recycling, bituminous paving original place cold renewal, length.These methods have weak point to a certain extent and there is shortcoming, cold recycled asphalt mixture is compared with heated tool butt-welding asphalt, the quality of heated tool butt-welding asphalt is compared can be more preferably, but the aggregate heating temperature of heated tool butt-welding asphalt is all higher than common hot-mix asphalt mixture with mixing and stirring temperature, and therefore power consumption is big.Due to temperature height during mixing and stirring, Colophonium is the most aging, very big at work progress medium pitch cigarette, affects the health of workmen.In the today paying attention to energy-conserving and environment-protective, need to find a kind of better method to solve this problem.
Along with China GDP maintains sustained and rapid growth, total energy consumption persistently rises, and the discharge of China's greenhouse gases is paid close attention to by countries in the world, reduces the discharge of harmful gas to be the task of top priority, for China, the application of research and extension WMA technology has highly important realistic meaning.In conjunction with current situation both domestic and external and the specific requirement of engineering, and the practical situation of China, the shortcoming fundamentally changing heated tool butt-welding asphalt in the past, play warm-mixed recycled asphalt mixture energy-saving and emission-reduction and the effect of safety and environmental protection, accelerate to digest and assimilate research promotion WMA technology, there is significant economic benefit and social benefit.
[summary of the invention]
In order to realize the purpose of regeneration asphalt warm mix and solve the problem that reclaimed asphalt mixture hot asphalt is the most aging, the invention provides a kind of warm-mixed recycled asphalt mixture and preparation method thereof, what this warm-mixed recycled asphalt mixture reduced regeneration asphalt conscientiously mixes and stirs temperature, adopts the following technical scheme that for this present invention
A kind of warm-mixed recycled asphalt mixture, including: old asphalt mixture, Colophonium, newly gather materials, breeze, regenerative agent and warm-mixing agent;Warm-mixing agent be moisture content be 18%-23% inorganic silicon-aluminum hydrochlorate;It is in terms of 1 part by Colophonium parts by weight, old asphalt mixture 3-8 part, 5-28 part of newly gathering materials, breeze 0.3-1 part, regenerative agent 0.006-0.05 part, warm-mixing agent 0.06-0.12 part.
The addition of above-mentioned warm-mixing agent is the 0.3% of warm-mixed recycled asphalt mixture weight, and the 25% of above-mentioned breeze weight is slaked lime.
Meanwhile, present invention also offers the preparation method of a kind of warm-mixed recycled asphalt mixture, comprise the following steps:
A, old asphalt mixture and newly gathering materials is heated to 140-150 DEG C dry after join and mix and stir in pot, pre-mix 80-100s, mix and stir kettle temperature and be maintained at 140-150 DEG C;
B, Colophonium is heated to 145-155 DEG C after join and mix and stir in pot, regenerative agent and warm-mixing agent are sprinkling upon the surface of Colophonium, in mix pot, mix and stir 80-110s;
C, breeze is joined and mixes and stirs in pot, mix and stir 80-100s, obtain warm-mixed recycled asphalt mixture;
D, this warm-mixed recycled asphalt mixture is taken the dish out of the pot at 135-145 DEG C, at 130-140 DEG C of compacted under.
In above-mentioned steps c, the mixing time of breeze is 90s.
Warm-mixing agent selected by the present invention be a kind of moisture content be 18%-23% inorganic silicon-aluminum hydrochlorate, profile is white powder, warm-mixing agent is added during reclaimed asphalt mixture mixes and stirs, extend 15~30 seconds duration of mixings, thus in binder, produce foaming, this is due to the moisture in warm-mixing agent at about 100 DEG C with superfine state sustained release out, it is allowed to foam with asphalt grouting, reduce asphalt viscosity, make the Colophonium can be uniform with aggregate blending under relatively low temperature conditions, foamable reaction in liquid phase binder plays the effect of lubricant, play warm mix effect, the temperature of mixing and stirring making compound significantly reduces to 135~145 DEG C.
Warm-mixed recycled asphalt mixture of the present invention has the advantage that 1) reuse waste asphalt and building stones;2) add conveniently, it is not necessary to additionally increase equipment;3) applied widely, it is possible to for the compound of various gradation types;4) the aging of work progress medium pitch can be reduced;5) service life of bituminous mixture blending equipment is extended;6) warm-mixing agent used uses natural minerals to do raw material, does not results in environmental pollution;7) construction temperature at least can reduce by 30 DEG C with the construction temperature of grating hot asphalt relatively;8) consumption of fuel can be reduced, about can save the energy of 30% compared with HMA: 9) reduce CO2、SOx、NOx, VOC, the discharge of the harmful substances such as dust, thus reduce the destruction to environment and the health hazard to workmen;10) can more stably store the longer time, it is simple to storage characteristics produces, extend transportation range.
[detailed description of the invention]
Below in conjunction with specific embodiment, technical solution of the present invention is further elaborated.
The aggregate grading used in embodiment is WAC-20 type, it may be assumed that
Embodiment 1
Take 1575g old asphalt mixture and 8514g newly gather materials be heated to 140 DEG C dry after join and mix and stir in pot, pre-mix 80s, mix and stir kettle temperature and be maintained at 140 DEG C;Joining after 306g Colophonium is heated to 145 DEG C mixes and stirs in pot, 2.1g regenerative agent and 31.5g warm-mixing agent is sprinkling upon the surface of Colophonium, mixes and stirs 80s in mix pot;Being joined by 105g breeze mixes and stirs in pot, mixes and stirs 80s, obtains warm-mixed recycled asphalt mixture, the 25% of its weight is wherein slaked lime in this breeze;This compound is taken the dish out of the pot at 135 DEG C, at 130 DEG C of compacted unders.
Embodiment 2
Take 5635g old asphalt mixture and 4334g newly gather materials be heated to 145 DEG C dry after join and mix and stir in pot, pre-mix 90s, mix and stir kettle temperature and be maintained at 145 DEG C;Joining after 737g Colophonium is heated to 150 DEG C mixes and stirs in pot, 36.1g regenerative agent and 33.8g warm-mixing agent is sprinkling upon the surface of Colophonium, mixes and stirs 90s in mix pot;Being joined by 564g breeze mixes and stirs in pot, mixes and stirs 90s, and it obtains warm-mixed recycled asphalt mixture;This compound is taken the dish out of the pot at 140 DEG C, at 135 DEG C of compacted unders.
Embodiment 3
Take 3150g old asphalt mixture and 6450g newly gather materials be heated to 148 DEG C dry after join and mix and stir in pot, pre-mix 97s, mix and stir kettle temperature and be maintained at 145 DEG C;Joining after 480g Colophonium is heated to 148 DEG C mixes and stirs in pot, 7.9g regenerative agent and 31.5g warm-mixing agent is sprinkling upon the surface of Colophonium, mixes and stirs 108s in mix pot;Being joined by 420g breeze mixes and stirs in pot, mixes and stirs 98s, obtains warm-mixed recycled asphalt mixture, the 25% of its weight is wherein slaked lime in this breeze;This compound is taken the dish out of the pot at 143 DEG C, at 138 DEG C of compacted unders.
Embodiment 4
Take 3381g old asphalt mixture and 6901g newly gather materials be heated to 147 DEG C dry after join and mix and stir in pot, pre-mix 86s, mix and stir kettle temperature and be maintained at 143 DEG C;Joining after 516g Colophonium is heated to 149 DEG C mixes and stirs in pot, 8.5g regenerative agent and 33.5g warm-mixing agent is sprinkling upon the surface of Colophonium, mixes and stirs 83s in mix pot;Being joined by 472g breeze mixes and stirs in pot, mixes and stirs 95s, obtains warm-mixed recycled asphalt mixture;This compound is taken the dish out of the pot at 139 DEG C, at 135 DEG C of compacted unders.
Embodiment 5
Take 2750g old asphalt mixture and 7408g newly gather materials be heated to 149 DEG C dry after join and mix and stir in pot, pre-mix 87s, mix and stir kettle temperature and be maintained at 146 DEG C;Joining after 481g Colophonium is heated to 153 DEG C mixes and stirs in pot, 6.9g regenerative agent and 33g warm-mixing agent is sprinkling upon the surface of Colophonium, mixes and stirs 88s in mix pot;Being joined by 361g breeze mixes and stirs in pot, mixes and stirs 87s, obtains warm-mixed recycled asphalt mixture;This compound is taken the dish out of the pot at 137 DEG C, at 133 DEG C of compacted unders.
Embodiment 6
Take 1650g old asphalt mixture and 8392g newly gather materials be heated to 148 DEG C dry after join and mix and stir in pot, pre-mix 86s, mix and stir kettle temperature and be maintained at 149 DEG C;Joining after 491g Colophonium is heated to 154 DEG C mixes and stirs in pot, 12.4g regenerative agent and 33g warm-mixing agent is sprinkling upon the surface of Colophonium, mixes and stirs 107s in mix pot;Being joined by 467g breeze mixes and stirs in pot, mixes and stirs 86s, obtains warm-mixed recycled asphalt mixture;This compound is taken the dish out of the pot at 143 DEG C, at 136 DEG C of compacted unders.
The test of warm-mixed recycled asphalt mixture Marshall residual stability and freeze-thaw split intensity ratio test are shown in Table 1:
The test of table 1 warm-mixed recycled asphalt mixture Marshall residual stability and freeze-thaw split intensity
Warm-mixed recycled asphalt mixture dynamic stability test, rut dynamic stability is shown in Table 2
Table 2 warm-mixed recycled asphalt mixture dynamic stability
As can be seen from Table 1 and Table 2, this Warm-Mix Bitumen Mixture Marshall residual stability test, freeze-thaw split strength ratio, rut dynamic stability all compliant " standard specification for construction and acceptance of highway asphalt pavement " (JTGF40-2004) related request.

Claims (3)

1. a warm-mixed recycled asphalt mixture, is characterized in that, including: old asphalt mixture, Colophonium, newly gather materials, breeze, regenerative agent and warm-mixing agent;Described warm-mixing agent be moisture content be 18%-23% inorganic silicon-aluminum hydrochlorate;It is in terms of 1 part by described Colophonium parts by weight, described old asphalt mixture 3-8 part, described 5-28 part of newly gathering materials, described breeze 0.3-1 part, described regenerative agent 0.006-0.05 part, described warm-mixing agent 0.06-0.12 part;Wherein, the addition of described warm-mixing agent is the 0.3% of warm-mixed recycled asphalt mixture weight;The 25% of described breeze weight is slaked lime.
2. a preparation method for warm-mixed recycled asphalt mixture according to claim 1, is characterized in that, comprises the following steps:
A, old asphalt mixture and newly gathering materials is heated to 140-150 DEG C dry after add and mix and stir in pot, mix and stir 80-100s in advance, mix and stir kettle temperature and be maintained at 140-150 DEG C;
B, Colophonium is heated to 145-155 DEG C after join and mix and stir in pot, regenerative agent and warm-mixing agent are sprinkled upon the surface of Colophonium, in mixing and stirring pot, mix and stir 80-110s;
C, breeze is joined and mixes and stirs in pot, mix and stir 80-100s, obtain warm-mixed recycled asphalt mixture;
D, described warm-mixed recycled asphalt mixture is taken the dish out of the pot at 135-145 DEG C, at 130-140 DEG C of compacted under.
The preparation method of warm-mixed recycled asphalt mixture the most according to claim 2, is characterized in that: in described step c, the mixing time of breeze is 90s.
CN201110135693.1A 2011-05-23 2011-05-23 A kind of warm-mixed recycled asphalt mixture and preparation method thereof Active CN102795812B (en)

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CN104086218B (en) * 2014-07-15 2017-01-11 苏州交通工程集团有限公司 Water-foaming warm mix asphalt regenerated mixture and preparation method thereof
CN104194358B (en) * 2014-08-26 2017-07-25 北京建筑大学 A kind of warm mix regeneration asphalt and preparation method thereof
CN104211326B (en) * 2014-08-26 2017-07-25 北京建筑大学 A kind of warm-mixed recycled asphalt mixture and preparation method thereof
RU2599658C2 (en) * 2014-11-19 2016-10-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Поволжский государственный технологический университет" Method for producing sand asphalt concrete
CN106630763B (en) * 2015-11-02 2018-10-12 中国石油化工股份有限公司 Warm mix polymer modified asphalt mixture and preparation method thereof
CN106630762B (en) * 2015-11-02 2018-10-12 中国石油化工股份有限公司 A kind of warm mix polymer modified asphalt mixture and preparation method thereof
CN105293996B (en) * 2015-11-27 2017-06-16 长安大学 A kind of preparation method of warm-mixed recycled asphalt mixture
CN105837090A (en) * 2016-03-24 2016-08-10 苏交科集团股份有限公司 High-addition-amount plant-mixed warm regenerated asphalt mixture and preparation method thereof
US20200308052A1 (en) * 2016-05-23 2020-10-01 Jiangsu Tiannuo Road Materials Technology Co.,Ltd Plant mix warm regenerated asphalt mixture and preparation method therefor
CN106145777B (en) * 2016-06-29 2019-03-01 广州新粤交通技术有限公司 Warm-mixed recycled asphalt mixture and preparation method thereof
CN106396502A (en) * 2016-08-31 2017-02-15 深圳海川新材料科技有限公司 Foamed warm mix recycled asphalt mixture and preparation method thereof
CN106830766A (en) * 2017-02-16 2017-06-13 昆山市交通工程有限公司 A kind of preparation method and its construction technology of warm mix regenerating mixture
CN109336456B (en) * 2018-10-25 2020-04-24 山东大学 Red mud-based asphalt mixture warm-mixing agent and preparation method thereof
CN109678397B (en) * 2019-01-19 2021-02-12 江苏盛达飞建筑材料有限公司 Regenerated asphalt mixture and preparation method thereof
CN110204252A (en) * 2019-05-10 2019-09-06 扬州大学 Reclaimed asphalt mixture preparation method

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CN101121822A (en) * 2006-08-09 2008-02-13 上海建设机场道路工程有限公司 Industrialized heat regeneration asphalt mixture and preparation method thereof
CN101602583A (en) * 2009-07-10 2009-12-16 武汉理工大学 A kind of warm-mixed auxiliary agent for asphalt mixture and preparation method thereof

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CN101602583A (en) * 2009-07-10 2009-12-16 武汉理工大学 A kind of warm-mixed auxiliary agent for asphalt mixture and preparation method thereof

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