CN103265198B - Fire-retardant warm-mixed asphalt additive - Google Patents
Fire-retardant warm-mixed asphalt additive Download PDFInfo
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- CN103265198B CN103265198B CN201310193483.7A CN201310193483A CN103265198B CN 103265198 B CN103265198 B CN 103265198B CN 201310193483 A CN201310193483 A CN 201310193483A CN 103265198 B CN103265198 B CN 103265198B
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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
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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 field of material technology, be specifically related to a kind of flame retardant type warm-mixed asphalt additive.
Background technology
Compared with Concrete Pavement Materials, asphalt pavement material have driving comfortable, noise is low, cling property good, traffic safety high.But because pitch has combustibility, in Tunnel Engineering, particularly use in large-scale vcehicular tunnel and there is certain fire safety evaluating hidden danger, and traditional hot-mix asphalt mixture is when constructing, again because asphalt mixture warm spends height, a large amount of obnoxious flavoures and dust can be produced, the healthy of construction environment and workmen in tunnel can be had a strong impact on.
In view of above problem, engineering technical personnel start to consider to adopt warm mix and flame-retarded technology to carry out the construction of tunnel sheet pavement.So far, a lot of warm mix or fire-retardant tunnel road surface test section have been built in the whole nation, have employed warm mix and flame-retarded technology, and all achieve good result of use while also having.But, because warm-mixing agent and fire retardant belong to variant production, must packing be distinguished when producing, so that single additive capacity is all less, bad employing machinery is thrown in, and not only makes metering, distributing, packaging process loaded down with trivial details, and artificial input mode is also unfavorable for quality control, easily produces and leak the problem such as throwing, few throwing.As can be seen here, develop a kind of warm mix and fire-retardant compound product just very necessary, so not only can reduce packing work, and single is thrown in dosage and increased, and is also convenient to adopt machinery to throw in, thus guarantees to throw in precision, improve the compound quality of production.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned the deficiencies in the prior art, provides a kind of easily manufactured, with low cost and flame retardant type warm-mixed asphalt additive of high-efficiency environment friendly.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 not affecting performance of asphalt mixture, the mix of asphalt and compacting temperature are reduced by more than 20 DEG C, the asphalt construction of various climatological region can be widely used in.
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, formed by the raw material mixing and ball milling of following weight part: sodium silicoaluminate 21 ~ 26 parts, ammonium polyphosphate 20 ~ 23 parts, trimeric cyanamide 4 ~ 8 parts, tetramethylolmethane 1 ~ 4 part, 13 ~ 16 parts, diatomite, dried powder boundary agent 0.3 ~ 0.6 part.
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: sodium silicoaluminate 23 parts, ammonium polyphosphate 21 parts, trimeric cyanamide 6 parts, tetramethylolmethane 2 parts, 14 parts, diatomite, dried powder boundary agent 0.4 part.
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: sodium silicoaluminate 24 parts, ammonium polyphosphate 22 parts, trimeric cyanamide 5 parts, tetramethylolmethane 3 parts, 15 parts, diatomite, dried powder boundary agent 0.5 part.
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: directly dropped in batching plant in the warm mix process of asphalt by flame retardant type warm-mixed asphalt additive of the present invention, with pitch and mineral aggregate mix evenly; 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) the present invention adopts sodium silicoaluminate, ammonium polyphosphate, trimeric cyanamide, tetramethylolmethane, diatomite and dried powder boundary agent to be that flame retardant type warm-mixed asphalt additive prepared by raw material; Wherein, sodium silicoaluminate is white crystalline powder, and its inside is containing accounting for its volume about 21%, and the crystal water that can discharge gradually at 85 DEG C ~ 180 DEG C temperature; When adding in mineral aggregate with pitch simultaneously, the moisture of sodium silicoaluminate release can cause pitch volumetric expansion and form foam asphalt, thus increases the workability of asphalt, realizes the reduction of its mix and compacting temperature; Ammonium polyphosphate is white powder, when 25 DEG C, in water, solubleness is less than 0.5g/mL, there is good thermostability, polyol dehydration carbonization can be promoted, being formed and have certain thickness nonflammable carbonaceous layer, is the dewatering agent that flame retardant type warm-mixed asphalt additive of the present invention stops pitch burning; Trimeric cyanamide is white oblique crystal powder, when 20 DEG C, in water, solubleness is less than 3.3g/mL, fusing point is 354 DEG C, when being heated in by flame retardant systems, decompose and discharge gas that is nontoxic in a large number and that can put out a fire, expanding simultaneously and form the compound of spongy rill structure, is the whipping agent that flame retardant type warm-mixed asphalt additive of the present invention stops pitch burning; Tetramethylolmethane is white powder crystallization, when 15 DEG C, 1g tetramethylolmethane dissolves in 18mL water, fusing point is 261 DEG C ~ 262 DEG C, in combustion can dehydrated dose seize moisture and carbonized, being the char-forming agent that flame retardant type warm-mixed asphalt additive of the present invention stops pitch burning, is also the basic substance forming foam charring layer; Diatomite is fines, has the characteristics such as body is light, matter is soft, porous, acidproof, specific surface area large, stable chemical nature, thermostability and high adsorption capacity, effectively can improve the use properties of asphalt; Dried powder boundary agent is generally the cementitious material with excellent water resistance and ageing resistance be made up of vinyl acetate between to for plastic and ethene, significantly can 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 non-toxic solid powder, and easily mix, preparation technology is simple.
(3) flame retardant type warm-mixed asphalt additive of the present invention is added in asphalt, the mix temperature of asphalt and compacting temperature can be made to reduce by more than 20 DEG C, 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 asphalt, asphalt can be made to have good high-temperature stability and anti-water damage, the asphalt pavement of tunnel or mine laneway can be widely used in.
(5) flame retardant type warm-mixed asphalt additive low production cost of the present invention, preparation method is simple, has good economy.
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment
Embodiment 1
The present embodiment flame retardant type warm-mixed asphalt additive is formed by the raw material mixing and ball milling of following weight part: sodium silicoaluminate 23 parts, ammonium polyphosphate 21 parts, trimeric cyanamide 6 parts, tetramethylolmethane 2 parts, 14 parts, diatomite, dried powder boundary agent 0.4 part; 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
The present embodiment flame retardant type warm-mixed asphalt additive is formed by the raw material mixing and ball milling of following weight part: sodium silicoaluminate 24 parts, ammonium polyphosphate 22 parts, trimeric cyanamide 5 parts, tetramethylolmethane 3 parts, 15 parts, diatomite, dried powder boundary agent 0.5 part; 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
The present embodiment flame retardant type warm-mixed asphalt additive is formed by the raw material mixing and ball milling of following weight part: sodium silicoaluminate 26 parts, ammonium polyphosphate 23 parts, trimeric cyanamide 8 parts, tetramethylolmethane 4 parts, 16 parts, diatomite, dried powder boundary agent 0.6 part; 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
The present embodiment flame retardant type warm-mixed asphalt additive is formed by the raw material mixing and ball milling of following weight part: sodium silicoaluminate 21 parts, ammonium polyphosphate 20 parts, trimeric cyanamide 4 parts, tetramethylolmethane 1 part, 13 parts, diatomite, dried powder boundary agent 0.3 part; 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
The present embodiment flame retardant type warm-mixed asphalt additive is formed by the raw material mixing and ball milling of following weight part: sodium silicoaluminate 22 parts, ammonium polyphosphate 21 parts, trimeric cyanamide 5 parts, tetramethylolmethane 2 parts, 14 parts, diatomite, dried powder boundary agent 0.6 part; 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.
Flame retardant type warm-mixed asphalt additive and the SBS modifying asphalt the embodiment of the present invention 1 to 5 prepared respectively and mineral aggregate mix even (mix temperature is in table 4) obtain the warm mix SBS modified flame-retardant asphalt adding flame retardant type warm-mixed asphalt additive of the present invention; Wherein the addition of flame retardant type warm-mixed asphalt additive of the present invention is 18% of SBS modifying asphalt weight.SBS modifying asphalt and mineral aggregate mix even (mix temperature is in table 4) are obtained heat and mixes SBS modified asphalt mixture.It is as shown in table 1 that heat mixes the technical indicator that SBS modified asphalt mixture and the optimum oil-stone ratio of warm mix SBS modified flame-retardant asphalt adding flame retardant type warm-mixed asphalt additive of the present invention be 4.7%, SBS modifying asphalt, and mineral aggregate gradation is as shown in table 2.
Table 1 SBS Technical Requirement of Modified Asphalt and detected result
The mineral aggregate gradation composition of table 2 asphalt
According to NB/SH/T0815-2010 " asphalt combustion performance mensuration-oxygen index method ", mix SBS modified asphalt mixture to heat respectively and carry out limiting oxygen index(LOI) test with the warm mix SBS modified flame-retardant pitch adding flame retardant type warm-mixed asphalt additive of the present invention, test result is in table 3.According to JTGE20-2011 " highway engineering pitch and Asphalt Mixture Experiment code ", mix SBS modified asphalt mixture to heat respectively and carry out the tests such as immersion Marshall, freeze-thaw split intensity, dynamic stability, low-temperature bending with the warm mix SBS modified flame-retardant pitch adding flame retardant type warm-mixed asphalt additive of the present invention, test result is in table 4.
Table 3 adds the warm mix SBS modified flame-retardant asphalt of flame retardant type warm-mixed asphalt additive of the present invention and hot limiting oxygen index(LOI) test result of mixing SBS modified asphalt mixture
Table 4 adds the warm mix SBS modified flame-retardant asphalt of flame retardant type warm-mixed asphalt additive of the present invention and hot the performance test results of mixing SBS modified asphalt mixture
From table 3 and table 4, 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 the mix of asphalt and compacting temperature can be reduced by more than 20 DEG C by flame retardant type warm-mixed asphalt additive of the present invention under the prerequisite not affecting performance of asphalt mixture, the asphalt construction of various climatological region can be widely used in.
The above is only preferred embodiment of the present invention, not imposes any restrictions the present invention.Every above embodiment is done according to invention technical spirit any simple modification, change and equivalence change, all still belong in the protection domain of technical solution of the present invention.
Claims (4)
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: sodium silicoaluminate 23 parts, ammonium polyphosphate 21 parts, trimeric cyanamide 6 parts, tetramethylolmethane 2 parts, 14 parts, diatomite, dried powder boundary agent 0.4 part.
2. 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: sodium silicoaluminate 24 parts, ammonium polyphosphate 22 parts, trimeric cyanamide 5 parts, tetramethylolmethane 3 parts, 15 parts, diatomite, dried powder boundary agent 0.5 part.
3. a kind of flame retardant type warm-mixed asphalt additive according to claim 1 and 2, is characterized in that, described dried powder boundary agent is redispersible latex powder.
4. a kind of flame retardant type warm-mixed asphalt additive according to claim 1 and 2, 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.
Priority Applications (1)
| 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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| CN201310193483.7A CN103265198B (en) | 2013-05-23 | 2013-05-23 | Fire-retardant warm-mixed asphalt additive |
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| CN103265198A CN103265198A (en) | 2013-08-28 |
| CN103265198B true CN103265198B (en) | 2015-02-18 |
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| 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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