CN103602086A - Warm-mixing environmental-protection inorganic flame retardant for tunnel road surfaces - Google Patents
Warm-mixing environmental-protection inorganic flame retardant for tunnel road surfaces Download PDFInfo
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- CN103602086A CN103602086A CN201310643279.0A CN201310643279A CN103602086A CN 103602086 A CN103602086 A CN 103602086A CN 201310643279 A CN201310643279 A CN 201310643279A CN 103602086 A CN103602086 A CN 103602086A
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- asphalt
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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
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Abstract
The invention discloses a warm-mixing environmental-protection inorganic flame retardant for tunnel road surfaces. The flame retardant is prepared by mixed ball milling of the following raw materials by the weight percentage: 53%-55% of aluminum hydroxide, 18%-20% of magnesium hydroxide, 19%-24% of zeolite, 2%-3% of nano TiO2, and 2%-3% of a tourmaline powder. The warm-mixing environmental-protection inorganic flame retardant is applied in tunnel road surface asphalt thus can improve the fire protection ability of an asphalt mixture, allows the asphalt mixture to have good flame retardation, also can reduce the mixing temperature of the asphalt mixture, and achieve purposes of energy conservation and emission reduction; and in addition, the flame retardant also has the function of reducing the car tail gas concentration inside tunnels, and is quite beneficial for improving the driving environment inside the tunnels.
Description
Technical field
The invention belongs to pavement asphalt material technology field, especially relate to warm mix environmental protection inorganic fire retardant for a kind of tunnel road surface.
Background technology
Along with highway in China tunnel is open to the traffic in a large number, the fire risk being caused by traffic accident in tunnel also constantly increases, and vcehicular tunnel belongs to the comparatively engineering structure of sealing, and in order to ensure the use safety in tunnel, the fire protection and rescue problem in tunnel seems particularly important.
During the domestic tunnel sheet pavement construction of China at present, the general hot-mix asphalt mixture that adopts is mated formation, but asphalt is a kind of temperature sensibility material, in order to reach the Service Performance of Asphalt Pavement of expection, when producing asphalt, need to be by asphalt heating to 145 ℃～170 ℃ of left and right, mineral aggregate is heated to 155 ℃～185 ℃, and then pitch and mineral aggregate are carried out to mix under the high temperature higher than 160 ℃, asphalt temperature after mix is not less than 150 ℃, temperature when paving and rolling is not less than 120 ℃, for modified asphalt mixture, need higher mix and compacting temperature.In this process, not only consume a large amount of energy, and can discharge a large amount of waste gas and dust in production, mix and the construction process of asphalt, had a strong impact on the healthy of the quality of surrounding environment and workmen.In addition tunnel internal ventilation equipment imperfection in construction process, and hot-mix asphalt mixture paves, temperature is higher, obnoxious flavour and heats a large amount of in paving process can not be got rid of, and cause tunnel internal construction environment severe.
The internal medium of tunnel due to its relative closure of growing up, in vcehicular tunnel, a large amount of vehicle exhausts can not be discharged in time, the carbon monoxide that contains a large amount of gaseous state phases in the middle of these tail gas, carbonic acid gas, oxynitride, hydrocarbon gas etc., also have the solid-state phase of part lead, acenaphthylene, pyrene, bend, fluoranthene, benzanthrene etc.Tail gas accumulates in a large number and can form higher tail gas concentration, when concentration reaches a threshold value, can cause people's stupor, even dead, the smog that tail gas forms not only affects pilot's line of vision, and pass through photochemical reaction with other source of pollution organism, directly pollute the facility in tunnel, because tunnel internal ventilation is poor, the tail gas of accumulation forms oil stain on road surface gradually, pavement skid resistance condition is declined, and impact forms safety.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, and a kind of warm mix environmental protection inorganic fire retardant for tunnel road surface that can comprehensively improve fire resistance, low-temperature construction performance and the tunnel internal tail gas absorptive character of asphalt in tunnel is provided.
For solving the problems of the technologies described above, the technical solution used in the present invention is: warm mix environmental protection inorganic fire retardant for a kind of tunnel road surface, it is characterized in that: the raw material mixing and ball milling by following weight percentage forms: aluminium hydroxide 53%～55%, magnesium hydroxide 18%～20%, zeolite 19%～24%, nano-TiO
22%～3%, tourmaline powder 2%～3%.
Warm mix environmental protection inorganic fire retardant for above-mentioned a kind of tunnel road surface, is characterized in that: the raw material mixing and ball milling by following weight percentage forms: aluminium hydroxide 53%～54%, magnesium hydroxide 19%～20%, zeolite 21%～24%, nano-TiO
22.5%～3%, tourmaline powder 2.5%～3%.
Warm mix environmental protection inorganic fire retardant for above-mentioned a kind of tunnel road surface, is characterized in that: the raw material mixing and ball milling by following weight percentage forms: aluminium hydroxide 54%, magnesium hydroxide 19%, zeolite 22%, nano-TiO
22%, tourmaline powder 3%.
Warm mix environmental protection inorganic fire retardant for above-mentioned a kind of tunnel road surface, is characterized in that: the speed of described ball milling is 400r/min～600r/min, the time of described ball milling is 35min～50min.
The present invention compared with prior art has the following advantages:
1, aluminium hydroxide and magnesium hydroxide that the present invention adopts all have fire-retardant, eliminate smoke, the function of filling, do not produce in addition secondary pollution, can produce synergy and non-volatile with many kinds of substance, nontoxic, corrodibility is little, the advantage such as cheap, and magnesium hydroxide has more advantage, major embodiment is the following aspects: the Heat stability is good of magnesium hydroxide, simultaneously in magnesium hydroxide energy and the acidity and the corrosives that produce in combustion processes, when meeting fire burning or under high temperature, magnesium hydroxide pyrolysis dehydration when temperature reaches 330 ℃ of left and right, absorb large calorimetric simultaneously, not only can reduce the temperature of material in flame, can also further suppress the decomposition of inflammable gas, thereby play fire-retardant object, zeolite of the present invention discharges in conjunction with water in about 85～182 ℃ of temperature ranges, the release of moisture makes asphalt mixture volumetric expansion, cause asphalt foaming, improve the workability and the wrapping property of gathering materials of compound at a lower temperature, thereby reduced the temperature of asphalt mixture mixing and compacting, tourmaline powder of the present invention has higher negative ion generation and far infrared transmissivity, can effectively absorb the heavy metal particles in air and water, nano-TiO of the present invention
2under the effect of daylight or light middle-ultraviolet lamp, make TiO
2activate and generate the radical with high catalytic activity, can produce very strong photoxidation and reducing power, can catalysis, photodissociation is attached to the organism such as various formaldehyde and the part inorganics of body surface, can play the effect that purifies air in tunnel.
2, the material component adopting in the present invention is the nontoxic powder of solid, easily mix, prepared fire retardant can effectively improve flame retardancy and the smoke-suppressing of pitch and asphalt, improves the fire resistance property of tunnel sheet pavement, when there is tunnel fire hazard, can effectively suppress fire spreading.
3, the present invention has improved the problems such as the amount of being fuming is large in tunnel asphalt mixture construction process, has reduced CO
2discharge, adapt to national energy-saving and reduce discharging, the trend of low-carbon environment-friendly, mixes tourmaline powder and nano-TiO
2can effectively absorb CO, CO in tunnel internal tail gas
2, the obnoxious flavour such as oxynitride, hydrocarbon gas, reduced the concentration of obnoxious flavour in tunnel, can play the effect that purifies air in tunnel.
4, raw material sources of the present invention are abundant, cheap, and without poisonous, obnoxious flavour, produce in asphalt combustion processes, and environmentally safe is not halogen-containing, belongs to environment friendly flame retardant.
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of tail gas clean-up testing apparatus of the present invention.
Description of reference numerals:
1-engine; 2-Filter dryer; 3-reaction box;
4-pipeline; 5-tail gas tester.
Embodiment
Embodiment 1
With warm mix environmental protection inorganic fire retardant, the raw material mixing and ball milling by following weight part forms the present embodiment tunnel road surface: aluminium hydroxide 54%, magnesium hydroxide 19%, zeolite 22%, nano-TiO
22%, tourmaline powder 3%, the speed of described ball milling is 500r/min, the time of ball milling is 40min.
With warm mix environmental protection inorganic fire retardant, the raw material mixing and ball milling by following weight part forms the present embodiment tunnel road surface: aluminium hydroxide 55%, magnesium hydroxide 19%, zeolite 21%, nano-TiO
22.5%, tourmaline powder 2.5%, the speed of described ball milling is 450r/min, the time of ball milling is 50min.
With warm mix environmental protection inorganic fire retardant, the raw material mixing and ball milling by following weight part forms the present embodiment tunnel road surface: aluminium hydroxide 53%, magnesium hydroxide 20%, zeolite 23%, nano-TiO
22%, tourmaline powder 2%, the speed of described ball milling is 550r/min, the time of ball milling is 35min.
Embodiment 4
With warm mix environmental protection inorganic fire retardant, the raw material mixing and ball milling by following weight part forms the present embodiment tunnel road surface: aluminium hydroxide 54%, magnesium hydroxide 20%, zeolite 21%, nano-TiO
23%, tourmaline powder 2%, the speed of described ball milling is 400r/min, the time of ball milling is 50min.
With warm mix environmental protection inorganic fire retardant, the raw material mixing and ball milling by following weight part forms the present embodiment tunnel road surface: aluminium hydroxide 53%, magnesium hydroxide 19%, zeolite 24%, nano-TiO
22%, tourmaline powder 2%, the speed of described ball milling is 450r/min, the time of ball milling is 45min.
The usage of embodiment 1 to 5 gained inorganic combustion inhibitor in preparing asphalt is: the grating type of mineral aggregate adopts OGFC-13 type, best bitumen aggregate ratio 4.55%, according to < < highway engineering pitch and Asphalt Mixture Experiment rules > > (JTGE20-2011), require to produce the Flame-retarded SBS Modified Asphalt compound that adds inorganic combustion inhibitor, insulation after SBS modifying asphalt is heated to 140 ℃～150 ℃, to gather materials and be heated to 145 ℃～155 ℃ and be incubated 4h～6h, by inorganic combustion inhibitor, gathering materials to be placed in and mix pot dry mixing 90s after trevira and insulation, then the pitch of breeze and insulation is added and mixed in pot, wet-mixing 90s at 140 ℃～155 ℃ temperature, after moulding, obtain asphalt, the consumption of described inorganic combustion inhibitor is 26%～29% of asphalt quality, the consumption of described trevira is 1% of quality of asphalt mixtures.
Tunnel road surface prepared by the present invention is as follows by the effect evaluation test method of warm mix environmental protection inorganic fire retardant:
One, flame retardant properties
According to < < highway engineering pitch and Asphalt Mixture Experiment rules > >, the Specifications of SBS modifying asphalt is detected, detected result is as shown in table 1, respectively the embodiment of the present invention 1 to 5 gained inorganic combustion inhibitor is joined in SBS modifying asphalt and prepares Flame-retarded SBS Modified Asphalt, preparation method is: SBS modifying asphalt is dehydrated to 1h～2h in the baking oven of 100 ℃～120 ℃, rising oven temperature to 160 ℃～170 ℃ of insulation 1h～2h, after inorganic combustion inhibitor being added in the SBS modifying asphalt of insulation, obtain mixture, mixture is placed in to the shearing of high speed shear instrument and obtains Flame-retarded SBS Modified Asphalt, the rotating speed of described boxshear apparatus is 5000r/min, shear time is 5min～8min, the consumption of described inorganic combustion inhibitor is 26%～29% of SBS asphalt quality, according to < < asphalt combustion performance mensuration-oxygen index method > > (NB/SH/T0815-2010), to adding the SBS modifying asphalt of inorganic combustion inhibitor, do not carry out oxygen index test with the Flame-retarded SBS Modified Asphalt that adds inorganic combustion inhibitor, detected result is as shown in table 2.
Technical requirements and the detected result of table 1 SBS modifying asphalt
The oxygen index detected result of table 2 different pitches
Detected result from table 2, Flame-retarded SBS Modified Asphalt oxygen index prepared by interpolation embodiment 1 to 5 gained inorganic combustion inhibitor is all higher than 27, belong to nonflammable material, illustrate that the prepared tunnel road surface of the present invention has good flame retardant effect with warm mix environmental protection inorganic fire retardant, can meet tunnel road surface requirement.
Two, production temperature
Adopt OGFC-13, according to < < highway engineering pitch and Asphalt Mixture Experiment rules > >, require to produce the SBS modified asphalt mixture that does not add inorganic combustion inhibitor and the Flame-retarded SBS Modified Asphalt compound that adds inorganic combustion inhibitor, the SBS modified asphalt mixture that does not add inorganic combustion inhibitor is 4.55% with the best bitumen aggregate ratio that adds the SBS modified asphalt mixture of inorganic combustion inhibitor, the technical indicator of SBS modifying asphalt is as shown in table 1, and mineral aggregate formate gradation composition is as shown in table 3.Table 4 has compared the SBS modified asphalt mixture and the temperature requirement that adds each production phase of Flame-retarded SBS Modified Asphalt compound of embodiment 1 that does not add inorganic combustion inhibitor.
Table 3 mineral aggregate formate gradation composition
The temperature contrast in table 4 different pitches each stage of compound
Add as can be seen from Table 4 after inorganic combustion inhibitor, in each phase temperature of the preparation of gathering materials, compound mix and moulding, require all significantly to reduce, the fuel oil consumption needing thus, the exhaust gas emission of generation etc. all reduce relatively, therefore the inorganic combustion inhibitor that prepared by the present invention can be realized the warm mix in asphalt preparation process, has the advantage of energy-saving and emission-reduction.
Three, pavement performance
According to < < highway engineering pitch and Asphalt Mixture Experiment rules > >, to not adding the SBS modified asphalt mixture of inorganic combustion inhibitor and adding the pavement performance contrast test of Flame-retarded SBS Modified Asphalt compound prepared by inorganic combustion inhibitor, test result is as shown in table 5.
Table 5 different pitches Asphalt Mixture test result
From table 5 test result, can find out, the Flame-retarded SBS Modified Asphalt compound that adds embodiment 1 to 5 gained inorganic combustion inhibitor has high-temperature stability and low-temperature cracking-resistance simultaneously, the interpolation of inorganic combustion inhibitor of the present invention decreases the water stability of asphalt, but all in higher level, can meet service requirements.
Four, tail gas clean-up test:
Testing method:
1) design tail gas clean-up testing apparatus: tail gas clean-up testing apparatus is by engine 1, reaction box 3, tail gas tester 5 and pipeline 4 connect to form, described engine 1 is for generation of waste gas, described reaction box 3 is the inner seal case that is provided with ultraviolet lamp and ordinary light source, the inlet mouth of reaction box 3 is connected with the venting port of engine 1 by pipeline 4, the air outlet of reaction box 3 is connected with the test cabinet of tail gas tester 5 by pipeline 4, reaction box 3 inside are provided with fan, on pipeline 4 between engine 1 and reaction box 3, be provided with Filter dryer 2, described tail gas tester 5 is AVL-4000 type exhaust-gas analyzer.
2) test process: starting engine 1 and reaction box 3, tail gas enters in reaction box 3 by pipeline 4, kills engine 1, simultaneously the inlet mouth of off-response case 3 after ventilation 30min～60min, open tail gas tester 5 and enter density real-time monitoring state, record the interior CO of reaction box 3, CO
2, the starting point concentration of hydrocarbon gas and oxynitride, exit test mode, the SBS modified asphalt mixture rut plate sample that does not add inorganic combustion inhibitor is put into reaction box, 10min records the concentration value of all kinds of gases, take out the SBS modified asphalt mixture rut plate sample that does not add inorganic combustion inhibitor, after this successively the Flame-retarded SBS Modified Asphalt compound rut plate sample that adds embodiment 1 to 5 preparation is put into reaction box 3 in turn, record each sample and put into the concentration value of reaction box 3 all kinds of gases after 10min, each image data is that tail gas tester 5 enters after monitoring state 60s, the structural representation of described tail gas clean-up testing apparatus as shown in Figure 1, test result is as shown in table 6.
Table 6 different pitches compound tail gas degradation efficiency test result
Add Flame-retarded SBS Modified Asphalt compound rut plate prepared by inorganic combustion inhibitor under photocatalysis, CO, CO
2, hydrocarbon gas, oxynitride concentration all decrease, show that the prepared inorganic combustion inhibitor of the present invention has good absorption tail gas effect, wherein CO, CO
2it is mainly due to the redox reaction of series of complex occurring under photocatalysis that concentration reduces, and then causes CO, CO
2concentration has produced reduction; Growth in time of the concentration of hydrocarbon gas and constantly to decline be due to Formed oxide compound and water after hydrocarbon gas generation oxygenolysis; The density loss of oxynitride is the most obvious, is mainly owing to being oxidized to HNO under photocatalysis
3and H
2o, this reaction process is irreversible, and therefore in theory through after the sufficiently long reaction times, oxynitride will be decomposed completely.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every any simple modification of above embodiment being done according to the technology of the present invention essence, change and equivalent structure change, and all still belong in the protection domain of technical solution of the present invention.
Claims (4)
1. a warm mix environmental protection inorganic fire retardant for tunnel road surface, is characterized in that: the raw material mixing and ball milling by following weight percentage forms: aluminium hydroxide 53%～55%, magnesium hydroxide 18%～20%, zeolite 19%～24%, nano-TiO
22%～3%, tourmaline powder 2%～3%.
2. according to warm mix environmental protection inorganic fire retardant for a kind of tunnel road surface claimed in claim 1, it is characterized in that: the raw material mixing and ball milling by following weight percentage forms: aluminium hydroxide 53%～54%, magnesium hydroxide 19%～20%, zeolite 21%～24%, nano-TiO
22.5%～3%, tourmaline powder 2.5%～3%.
3. according to warm mix environmental protection inorganic fire retardant for a kind of tunnel road surface claimed in claim 2, it is characterized in that: the raw material mixing and ball milling by following weight percentage forms: aluminium hydroxide 54%, magnesium hydroxide 19%, zeolite 22%, nano-TiO
22%, tourmaline powder 3%.
4. according to warm mix environmental protection inorganic fire retardant for a kind of tunnel road surface claimed in claim 1, it is characterized in that: the speed of described ball milling is 400r/min～600r/min, the time of ball milling is 35min～50min.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105837091A (en) * | 2016-03-25 | 2016-08-10 | 湖北大学 | Composite warm-mixed flame-retarding antiskid asphalt tunnel pavement material and preparation method thereof |
| CN107285666A (en) * | 2017-07-04 | 2017-10-24 | 中国路桥工程有限责任公司 | Inorganic fire-retarded modified pitch and its preparation technology |
| CN109385104A (en) * | 2017-08-10 | 2019-02-26 | 常州利尔德通新材料科技有限公司 | A kind of preparation method and applications of warm mix environmentally-friendly asphalt fire retardant |
| CN111925562A (en) * | 2020-08-19 | 2020-11-13 | 南京林业大学 | Synergistic inhibition method of flame-retardant warm mixing agent on thermal decomposition of asphalt mixture |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105837091A (en) * | 2016-03-25 | 2016-08-10 | 湖北大学 | Composite warm-mixed flame-retarding antiskid asphalt tunnel pavement material and preparation method thereof |
| CN105837091B (en) * | 2016-03-25 | 2018-05-22 | 湖北大学 | A kind of compound warm mix flame-retardant antiskid asphalt tunnel road surface material and preparation method thereof |
| CN107285666A (en) * | 2017-07-04 | 2017-10-24 | 中国路桥工程有限责任公司 | Inorganic fire-retarded modified pitch and its preparation technology |
| CN107285666B (en) * | 2017-07-04 | 2019-09-17 | 中国路桥工程有限责任公司 | Inorganic fire-retarded modified pitch and its preparation process |
| CN109385104A (en) * | 2017-08-10 | 2019-02-26 | 常州利尔德通新材料科技有限公司 | A kind of preparation method and applications of warm mix environmentally-friendly asphalt fire retardant |
| CN111925562A (en) * | 2020-08-19 | 2020-11-13 | 南京林业大学 | Synergistic inhibition method of flame-retardant warm mixing agent on thermal decomposition of asphalt mixture |
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Application publication date: 20140226 |