CN103265198A - Fire-retardant warm-mixed asphalt additive - Google Patents
Fire-retardant warm-mixed asphalt additive Download PDFInfo
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- CN103265198A CN103265198A CN2013101934837A CN201310193483A CN103265198A CN 103265198 A CN103265198 A CN 103265198A CN 2013101934837 A CN2013101934837 A CN 2013101934837A CN 201310193483 A CN201310193483 A CN 201310193483A CN 103265198 A CN103265198 A CN 103265198A
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The invention provides a fire-retardant warm-mixed asphalt additive which is formed by mixing and carrying out ball-milling on the following raw materials in parts by weight: 21-26 parts of sodium silicoaluminate, 20-23 parts of ammonium polyphosphate, 4-8 parts of melamine, 1-4 parts of pentaerythritol, 13-16 parts of diatomite and 0.3-0.6 part of a dry powder interfacial agent. According to the fire-retardant warm-mixed asphalt additive, the limited oxygen index of an asphalt mixture can achieve more than 25 percent, the mixing and compacting temperature of the asphalt mixture can be reduced by more than 20 DEG C under the premise that the performance of the asphalt mixture is not influenced, and the fire-retardant warm-mixed asphalt additive can be widely applied to asphalt mixture construction in various climates of regions.
Description
Technical field
The invention belongs to road bitumen material technology field, be specifically related to a kind of flame retardant type warm-mixed asphalt additive.
Background technology
Compare with Concrete Pavement Materials, asphalt pavement material has comfortable, the characteristics such as noise is low, cling property good, traffic safety height of driving.But because pitch has combustibility, in Tunnel Engineering, particularly use in the large-scale vcehicular tunnel and have certain fire safety evaluating hidden danger, and traditional hot-mix asphalt mixture is when construction, again because asphalt mixture warm is spent height, a large amount of obnoxious flavour and dust can be produced, the healthy of construction environment and workmen in the tunnel can be had a strong impact on.
In view of above problem, engineering technical personnel begin to consider to adopt temperature to mix the construction of carrying out tunnel sheet pavement with flame-retarded technology.So far, the whole nation has built that a lot of temperature are mixed or fire-retardant tunnel road surface test section, has adopted temperature to mix and flame-retarded technology when also having, and has all obtained good result of use.Yet, because warm-mixing agent and fire retardant belong to variant production, when producing, must distinguish packing, so that the single additive capacity is all less, and bad employing machinery is thrown in, and not only makes metering divide process of assembling loaded down with trivial details, and the mode of manually throwing in also is unfavorable for quality control, is easy to generate Lou problems such as throwing, lack throwing.This shows, develop a kind of temperature and mix with fire-retardant compound product just very necessaryly, so not only can reduce packing work, and single throws in dosage and increase, also be convenient to adopt machinery to throw in, thereby guarantee to throw in precision, improve the compound quality of production.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned the deficiencies in the prior art, and a kind of flame retardant type warm-mixed asphalt additive of easily manufactured, with low cost and high-efficiency environment friendly is provided.This flame retardant type warm-mixed asphalt additive can make the limiting oxygen index(LOI) of asphalt up to more than 25%, and under the prerequisite that does not influence performance of asphalt mixture the mix of asphalt and compacting temperature are being reduced more than 20 ℃, can be widely used in the asphalt construction of various climatological regions.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of flame retardant type warm-mixed asphalt additive, it is characterized in that, raw material mixing and ball milling by following weight part forms: 21～26 parts of sodium silicoaluminates, 20～23 parts of ammonium polyphosphates, 4～8 parts of trimeric cyanamides, 1～4 part of tetramethylolmethane, 13～16 parts in diatomite, 0.3～0.6 part of dried powder boundary agent.
Above-mentioned a kind of flame retardant type warm-mixed asphalt additive is characterized in that, is formed by the raw material mixing and ball milling of following weight part: 23 parts of sodium silicoaluminates, 21 parts of ammonium polyphosphates, 6 parts of trimeric cyanamides, 2 parts of tetramethylolmethanes, 14 parts in diatomite, 0.4 part of dried powder boundary agent.
Above-mentioned a kind of flame retardant type warm-mixed asphalt additive is characterized in that, is formed by the raw material mixing and ball milling of following weight part: 24 parts of sodium silicoaluminates, 22 parts of ammonium polyphosphates, 5 parts of trimeric cyanamides, 3 parts of tetramethylolmethanes, 15 parts in diatomite, 0.5 part of dried powder boundary agent.
Above-mentioned a kind of flame retardant type warm-mixed asphalt additive is characterized in that described dried powder boundary agent is redispersible latex powder.
Above-mentioned a kind of flame retardant type warm-mixed asphalt additive is characterized in that the speed of described ball milling is 300r/min～500r/min, and the time of described ball milling is 30min～45min.
The using method of flame retardant type warm-mixed asphalt additive of the present invention is: flame retardant type warm-mixed asphalt additive of the present invention is mixed in the process in the temperature of asphalt directly dropped in the batching plant, evenly get final product with pitch and mineral aggregate mix; The addition of flame retardant type warm-mixed asphalt additive of the present invention is 16%～20% of pitch weight.
The present invention compared with prior art has the following advantages:
(1) to adopt sodium silicoaluminate, ammonium polyphosphate, trimeric cyanamide, tetramethylolmethane, diatomite and dried powder boundary agent be feedstock production flame retardant type warm-mixed asphalt additive in the present invention; Wherein, sodium silicoaluminate is white crystalline powder, and its inside contains that to account for its volume about 21%, and the crystal water that can discharge gradually under 85 ℃～180 ℃ temperature; When adding in the mineral aggregate simultaneously with pitch, the moisture that sodium silicoaluminate discharges can cause the pitch volumetric expansion and form foam asphalt, thereby increases the workability of asphalt, realizes the reduction of its mix and compacting temperature; Ammonium polyphosphate is white powder, in the time of 25 ℃ in the water solubleness less than 0.5g/mL, has good thermostability, can promote the polyol dehydration carbonization, formation has certain thickness nonflammable carbonaceous layer, is the dewatering agent that flame retardant type warm-mixed asphalt additive of the present invention stops the pitch burning; Trimeric cyanamide is white oblique crystal powder, in the time of 20 ℃ in the water solubleness less than 3.3g/mL, fusing point is 354 ℃, when in by flame retardant systems, being heated, decompose and to discharge a large amount of nontoxic and gases that can put out a fire, expanding and form the compound of spongy rill structure simultaneously, is the whipping agent that flame retardant type warm-mixed asphalt additive of the present invention stops the pitch burning; Tetramethylolmethane is the white powder crystallization, the 1g tetramethylolmethane dissolves in the 18mL water in the time of 15 ℃, fusing point is 261 ℃～262 ℃, can dehydrated dose in combustion processes seize moisture and by charing, being the char-forming agent that flame retardant type warm-mixed asphalt additive of the present invention stops the pitch burning, also is the basic substance that forms the foam charring layer; Diatomite is fines, has that body is light, matter is soft, a porous, acidproof, characteristic such as specific surface area is big, chemical property is stable, thermostability and high adsorption capacity, can effectively improve the use properties of asphalt; The dried powder boundary agent generally is the cementitious material of being made by vinyl acetate between to for plastic and ethene with excellent water resistance and ageing resistance, can significantly strengthen the bonding force of asphalt, and the agent of dried powder boundary described in the present invention is preferably redispersible latex powder.
(2) each component of flame retardant type warm-mixed asphalt additive of the present invention is the non-toxic solid powder, mixes easily, and preparation technology is simple.
(3) flame retardant type warm-mixed asphalt additive of the present invention is added in the asphalt, the mix temperature of asphalt and compacting temperature are reduced more than 20 ℃, make the limiting oxygen index(LOI) of asphalt up to more than 25%.
(4) flame retardant type warm-mixed asphalt additive of the present invention is added in the asphalt, can make asphalt have good high-temperature stability and anti-water damage, can be widely used in the asphalt pavement of tunnel or mine laneway.
(5) flame retardant type warm-mixed asphalt additive low production cost of the present invention, the preparation method is simple, has good and economic.
Be described in further detail below in conjunction with the present invention of embodiment.
Embodiment
Embodiment 1
Present embodiment flame retardant type warm-mixed asphalt additive is formed by the raw material mixing and ball milling of following weight part: 23 parts of sodium silicoaluminates, 21 parts of ammonium polyphosphates, 6 parts of trimeric cyanamides, 2 parts of tetramethylolmethanes, 14 parts in diatomite, 0.4 part of dried powder boundary agent; Preferably, described dried powder boundary agent is redispersible latex powder, and the speed of described ball milling is 400r/min, and the time of described ball milling is 36min.
Embodiment 2
Present embodiment flame retardant type warm-mixed asphalt additive is formed by the raw material mixing and ball milling of following weight part: 24 parts of sodium silicoaluminates, 22 parts of ammonium polyphosphates, 5 parts of trimeric cyanamides, 3 parts of tetramethylolmethanes, 15 parts in diatomite, 0.5 part of dried powder boundary agent; Preferably, described dried powder boundary agent is redispersible latex powder, and the speed of described ball milling is 350r/min, and the time of described ball milling is 43min.
Embodiment 3
Present embodiment flame retardant type warm-mixed asphalt additive is formed by the raw material mixing and ball milling of following weight part: 26 parts of sodium silicoaluminates, 23 parts of ammonium polyphosphates, 8 parts of trimeric cyanamides, 4 parts of tetramethylolmethanes, 16 parts in diatomite, 0.6 part of dried powder boundary agent; Preferably, described dried powder boundary agent is redispersible latex powder, and the speed of described ball milling is 500r/min, and the time of described ball milling is 30min.
Embodiment 4
Present embodiment flame retardant type warm-mixed asphalt additive is formed by the raw material mixing and ball milling of following weight part: 21 parts of sodium silicoaluminates, 20 parts of ammonium polyphosphates, 4 parts of trimeric cyanamides, 1 part of tetramethylolmethane, 13 parts in diatomite, 0.3 part of dried powder boundary agent; Preferably, described dried powder boundary agent is redispersible latex powder, and the speed of described ball milling is 300r/min, and the time of described ball milling is 45min.
Embodiment 5
Present embodiment flame retardant type warm-mixed asphalt additive is formed by the raw material mixing and ball milling of following weight part: 22 parts of sodium silicoaluminates, 21 parts of ammonium polyphosphates, 5 parts of trimeric cyanamides, 2 parts of tetramethylolmethanes, 14 parts in diatomite, 0.6 part of dried powder boundary agent; Preferably, described dried powder boundary agent is redispersible latex powder, and the speed of described ball milling is 480r/min, and the time of described ball milling is 32min.
The temperature that respectively the flame retardant type warm-mixed asphalt additive of the embodiment of the invention 1 to 5 preparation and SBS modifying asphalt and mineral aggregate mix even (the mix temperature sees Table 4) is obtained adding flame retardant type warm-mixed asphalt additive of the present invention is mixed SBS modified flame-retardant asphalt; Wherein the addition of flame retardant type warm-mixed asphalt additive of the present invention is 18% of SBS modifying asphalt weight.With SBS modifying asphalt and mineral aggregate mix evenly (the mix temperature sees Table 4) obtain heat and mix the SBS modified asphalt mixture.Heat is mixed best bitumen aggregate ratio that SBS modified asphalt mixture and the temperature of adding flame retardant type warm-mixed asphalt additive of the present invention mix SBS modified flame-retardant asphalt, and to be the technical indicator of 4.7%, SBS modifying asphalt as shown in table 1, and mineral aggregate gradation is as shown in table 2.
Table 1 SBS modified asphalt technology requires and detected result
The mineral aggregate gradation of table 2 asphalt is formed
According to NB/SH/T0815-2010 " pitch combustionproperty mensuration-oxygen index method ", respectively heat is mixed the SBS modified asphalt mixture and mix SBS modified flame-retardant pitch with the temperature of adding flame retardant type warm-mixed asphalt additive of the present invention and carry out the limiting oxygen index(LOI) test, test result sees Table 3.According to JTGE20-2011 " highway engineering pitch and asphalt testing regulation ", respectively heat is mixed SBS modified asphalt mixture and the temperature of adding flame retardant type warm-mixed asphalt additive of the present invention and mix the tests such as Marshall, freeze thawing cleavage strength, dynamic stability, low-temperature bending of soaking of SBS modified flame-retardant pitch, test result sees Table 4.
Table 3 adds the temperature of flame retardant type warm-mixed asphalt additive of the present invention and mixes SBS modified flame-retardant asphalt and hot limiting oxygen index(LOI) test result of mixing the SBS modified asphalt mixture
Table 4 adds the temperature of flame retardant type warm-mixed asphalt additive of the present invention and mixes SBS modified flame-retardant asphalt and hot The performance test results of mixing the SBS modified asphalt mixture
By table 3 and table 4 as can be known, flame retardant type warm-mixed asphalt additive of the present invention can make the limiting oxygen index(LOI) of asphalt up to more than 25%, and flame retardant type warm-mixed asphalt additive of the present invention can reduce the mix of asphalt and compacting temperature more than 20 ℃ under the prerequisite that does not influence performance of asphalt mixture, can be widely used in the asphalt construction of various climatological regions.
The above only is preferred embodiment of the present invention, is not that the present invention is imposed any restrictions.Every any simple modification, change and equivalence of above embodiment being done according to the invention technical spirit changes, and all still belongs in the protection domain of technical solution of the present invention.
Claims (5)
1. a flame retardant type warm-mixed asphalt additive is characterized in that, is formed by the raw material mixing and ball milling of following weight part: 21～26 parts of sodium silicoaluminates, 20～23 parts of ammonium polyphosphates, 4～8 parts of trimeric cyanamides, 1～4 part of tetramethylolmethane, 13～16 parts in diatomite, 0.3～0.6 part of dried powder boundary agent.
2. a kind of flame retardant type warm-mixed asphalt additive according to claim 1 is characterized in that, is formed by the raw material mixing and ball milling of following weight part: 23 parts of sodium silicoaluminates, 21 parts of ammonium polyphosphates, 6 parts of trimeric cyanamides, 2 parts of tetramethylolmethanes, 14 parts in diatomite, 0.4 part of dried powder boundary agent.
3. a kind of flame retardant type warm-mixed asphalt additive according to claim 1 is characterized in that, is formed by the raw material mixing and ball milling of following weight part: 24 parts of sodium silicoaluminates, 22 parts of ammonium polyphosphates, 5 parts of trimeric cyanamides, 3 parts of tetramethylolmethanes, 15 parts in diatomite, 0.5 part of dried powder boundary agent.
4. according to claim 1,2 or 3 described a kind of flame retardant type warm-mixed asphalt additives, it is characterized in that described dried powder boundary agent is redispersible latex powder.
5. according to claim 1,2 or 3 described a kind of flame retardant type warm-mixed asphalt additives, it is characterized in that the speed of described ball milling is 300r/min～500r/min, the time of described ball milling is 30min～45min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310193483.7A CN103265198B (en) | 2013-05-23 | 2013-05-23 | Fire-retardant warm-mixed asphalt additive |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310193483.7A CN103265198B (en) | 2013-05-23 | 2013-05-23 | Fire-retardant warm-mixed asphalt additive |
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| CN103265198A true CN103265198A (en) | 2013-08-28 |
| CN103265198B CN103265198B (en) | 2015-02-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103911007A (en) * | 2014-03-04 | 2014-07-09 | 山西省交通科学研究院 | Safe and environment-friendly asphalt for road and preparation method thereof |
| CN109517395A (en) * | 2018-11-27 | 2019-03-26 | 华叶莹 | A kind of flame-retardant high-strength asphalt additive and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173631A (en) * | 2011-02-21 | 2011-09-07 | 山西省交通科学研究院 | Flame retardant for tunnel asphalt pavement |
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2013
- 2013-05-23 CN CN201310193483.7A patent/CN103265198B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173631A (en) * | 2011-02-21 | 2011-09-07 | 山西省交通科学研究院 | Flame retardant for tunnel asphalt pavement |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103911007A (en) * | 2014-03-04 | 2014-07-09 | 山西省交通科学研究院 | Safe and environment-friendly asphalt for road and preparation method thereof |
| CN103911007B (en) * | 2014-03-04 | 2016-03-02 | 山西省交通科学研究院 | A kind of safe environment protection type bitumen for road use and preparation method thereof |
| CN109517395A (en) * | 2018-11-27 | 2019-03-26 | 华叶莹 | A kind of flame-retardant high-strength asphalt additive and preparation method thereof |
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| CN103265198B (en) | 2015-02-18 |
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