CN101173106A - Rubber powder-asphalt emulsion for concrete asphalt mortar and method for producing the same - Google Patents
Rubber powder-asphalt emulsion for concrete asphalt mortar and method for producing the same Download PDFInfo
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Abstract
The invention relates to rubber powder-asphalt emulsion for cement asphalt mortar and the preparation method thereof. The rubber powder-asphalt emulsions is formed through mixing emulsifiers, asphalt, rubber powder, stabilizing agents, thickener, assistant agents for adjusting the PH valve with the weight ratio of 0.1 to 3 percent, 20 to 60 percent, 5 to 40 percent, 0.1 to 0.5 percent, 0.1 to 0.3 percent, 0 to 0.2 percent, and the rest is water. The preparation method thereof includes three ways as follows: the asphalt is modified with the rubber powder primarily, emulsification is conducted; the asphalt is emulsified first, and then the rubber powder is emulsified; the rubber powder is emulsified and the asphalt subsequently is emulsified. By making full use of the rubber powder which is classified as solid waste, the invention has the advantages of protecting environment, saving energy, distinctly improving the stability of the CA mortar and reducing the production cost of the CA mortar.
Description
Technical field
The present invention relates to a kind of elastic layer that is used for high-speed railway--rubber powder-bitumen emulsion of cement asphalt mortar and preparation method thereof, this bitumen emulsion also can be used for engineerings such as the slurry seal of highway pavement, little table place, asphalt, belongs to building material technical field.
Technical background
Waste old is mainly derived from rubber items such as damaged tire, scrap rubber footwear, scrap rubber pipe and adhesive tape, and next derives from scrap stock and the waste product that produces in the rubber production process, belongs to using industrial solid waste.Waste rubber belongs to thermoset copolymer material, is difficult to degraded under the natural condition.If outdoor storage, not only land occupation worsens physical environment, destroys plant-growth, and very easily grows mosquito through after exposing to the sun and rain, spreads disease, jeopardizes ecotope.At present, about 2,000 ten thousand tons of the annual production of whole world waste old, the annual production of China's waste old are estimated to have reached 1,500,000 tons, wherein doughnut whole world year learies has more than 1,000,000,000, according to statistics, China's junked tire in 2002 reaches 8,000 ten thousand, reaches 1.12 hundred million in 2005.Along with the develop rapidly of automotive industry, the generation of China's junked tire expects 2010 and will reach 200,000,000 also with double-digit speed increment in every year.So a large amount of waste rubbers brings very big environmental stress, thereby the processing of junked tire is extremely urgent.Because reclaimed rubber is easy to generate secondary pollution in process of production, producing rubber powder has become the main path that waste old is recycled.In addition, China's rubber resource is in short supply relatively, and almost 45% of year rubber consumption needs import.Therefore, carry out the comprehensive utilization of waste Crumb rubber, to the protection environment, economizing on resources has important theory and realistic meaning.
Cement asphalt mortar (being called for short the CA mortar) is the key components of plate-type slag-free orbit, and it plays stable and buffering effect in train operation, all has important effect to improving train security of running at high speed and the comfortableness of taking.Between track plate and concrete bed, make track have elasticity on the one hand the CA mortar injection, replace the function of ballast aggregate, also higher because of intensity, survivable characteristics are arranged.The opposing party CA mortar can be adjusted the track construction error in passing and be adjusted when keeping in repair in the future when laying usefulness.The ballastless track structure is because of having good stability, lasting, few, the good endurance of maintenance load of track geometry size maintenance, bridge second phase dead load is little, can reduce tunnel clearance and reduce excavation area, the overall economic efficiency advantages of higher has obtained application more and more widely abroad on the Line for Passenger Transportation.Be to realize the passenger-cargo carriage separated time, with further promotion China rapid economy development, a large amount of layings of ballastless track structure on Line for Passenger Transportation have become the development trend of China Express Railway.Therefore, the CA mortar is with a wide range of applications in China.
Substantially all adopt starting material such as emulsified bitumen, cement, sand to prepare the CA mortar at present both at home and abroad, wherein the main effect of cement provides intensity, and emulsified bitumen provides elasticity for mortar.Because pitch is a kind of temperature-sensitive material, have that low temperature is easy to crack, the yielding characteristics of high temperature, prepare the shortcoming that there is the weathering resistance difference in elastic mortar with emulsified bitumen.In addition, because the emulsified bitumen consumption in the CA mortar is more, the price of CA mortar is up to 2000 yuan/m
3Therefore, be necessary existing C A mortar is carried out modification, and reduce its cost simultaneously.
Japan is in order to improve the weathering resistance of CA mortar, invented a kind of P emulsion that can use at cold district, but can further increase the cost of CA mortar.There are some researches show, pitch is carried out modification, can improve heat-resisting, the winter hardiness of bituminous, therefore, using modified emulsifying asphalt to replace common emulsified bitumen preparation CA mortar is a direction.But because the asphalt emulsification difficulty after the modification is big, the emulsifying process complexity, and can significantly increase the cost of emulsified bitumen, therefore, use modified emulsifying asphalt preparation CA mortar to be difficult to realize simultaneously modification and the purpose that reduces cost.
Because the paraffin in the rubber powder energy adsorptive pitch can improve bituminous high and low temperature performance, reduce the be full of cracks of bituminous pavement and wear out the driving safety of raising vehicle and the work-ing life on road surface.Rubber powder modified asphalt has low price, and some performance is better than the advantage of SBS modifying asphalt.Therefore, rubber powder modified asphalt has become the important research direction of modifying asphalt.But at present rubber powder being used for the bituminous purpose is that pitch is carried out modification, its volume generally is no more than 5% of asphalt content, the consumption of rubber powder and the reduction of pitch cost are had little significance, and at present both at home and abroad also emulsion is not made in rubber powder and pitch blend and be used for the bibliographical information of CA mortar.
Summary of the invention
The technical problem to be solved in the present invention is to use modified emulsifying asphalt preparation CA mortar to be difficult to realize modification simultaneously and reduce cost, and the comprehensive complete utilization problem of waste old, provide that a kind of environmental protection and energy saving, production cost are low, the CA mortar of good weatherability is with rubber powder-bitumen emulsion.
The applicant is by discovering, rubber is a kind of elasticity macromolecular material, and rubber powder has emulsified bitumen and similarly acts in cement asphalt mortar, promptly has toughness reinforcing, vibration damping, endergonic function; In addition, the weathering resistance of rubber is significantly better than pitch, and rubber powder can be used as a kind of properties-correcting agent and is used to improve the bituminous temperature sensitivity; Simultaneously again since the price of the rubber powder that processes by waste rubber than emulsified bitumen considerably cheaper.Therefore,, and, not only can economize on resources, protect environment, can also improve the weathering resistance of CA mortar, reduce CA mortar cost with its preparation CA mortar if can produce rubber powder--bitumen emulsion with the rubber powder that waste old processes.
The applicant adopts emulsifying technology that rubber powder and pitch are carried out emulsification by discovering, can make stable performance, satisfy the rubber powder-bitumen emulsion of CA mortar production requirement.
Based on above-mentioned research, the present invention adopts following technical scheme:
The present invention is formulated by following components in mass portion number:
Emulsifying agent: 0.1～3%
Pitch: 20～60%
Rubber powder: 5～40%
Water: 30～50%
Stablizer: 0.1～0.5%
Thickening material: 0.1～0.3%
Regulate the auxiliary agent of pH value: 0-0.2%;
Pitch of the present invention is rock asphalt or petroleum pitch, and the pitch trade mark can be AH-70, AH-90;
Emulsifying agent of the present invention can be that a kind of in a kind of or cationic, the anionic in cationic, the anionic is composited with non-ionic type;
Rubber powder of the present invention is processed by waste old, its fineness 〉=80 orders;
Stablizer of the present invention is an inorganic salts, as vitriol, carbonate, hydrochloride etc., as adopting positively charged ion or positively charged ion and nonionic Compositional type emulsifying agent, then should select ammonium chloride, sodium-chlor, calcium chloride, magnesium chloride, iron(ic) chloride, aluminum chloride etc. for use; As adopt negatively charged ion or negatively charged ion and nonionic Compositional type emulsifying agent, then should select for use sodium sulfate, yellow soda ash, water glass as stablizer.
Thickening material of the present invention and dissimilar emulsifying agent be composite to have selectivity, as be cationic or positively charged ion and nonionic Compositional type emulsifying agent, can be chosen in and be neutral thickening material such as polyvinyl alcohol, methylcellulose gum in the water, as be anionic or negatively charged ion and nonionic Compositional type emulsifying agent, can select polyvinyl alcohol, methylcellulose gum, carboxymethyl cellulose, treated starch, acrylic acid or the like gelatin etc.
Rubber powder-bitumen emulsion of the present invention also can add the auxiliary agent of regulating ph value of emulsion, and its volume is the 0-0.2% of quality of the emulsion.When emulsifying agent is cationic or when positively charged ion and nonionic Compositional type, the auxiliary agent of regulating ph value of emulsion is selected from phenylformic acid, formic acid, acetate, Succinic Acid and tartrate or hydrochloric acid, sulfuric acid, makes solution be acid; When emulsifying agent was anionic or negatively charged ion and nonionic Compositional type, the auxiliary agent of regulating ph value of emulsion was selected from potassium hydroxide, sodium hydroxide, yellow soda ash or water glass, made emulsion be alkalescence.
Rubber powder of the present invention-bitumen emulsion preparation method can adopt any in following three kinds of methods:
First kind, elder generation to asphalt modification, carries out emulsification with rubber powder again: adopt the method for rubber powder modified asphalt commonly used to make rubber powder modified asphalt, and metering is standby after being heated to 120～160 ℃; Add fully to stir in the hot water behind the auxiliary agent dosage with emulsifying agent, inorganic salts stablizer, thickening material and adjusting pH value and make 50～70 ℃ emulsifier solution, and measure standby; Open bitumen emulsifying plant, add emulsifier solution behind preheating 30～60s, and then add rubber powder modified asphalt under the prerequisite of local boiling fast and carry out emulsification preventing, emulsification times is 30～120s.
Second kind, first emulsified bitumen, the reemulsification rubber powder: metering was standby after pitch was heated to 120～160 ℃; Add fully to stir in the hot water behind the auxiliary agent dosage with emulsifying agent, inorganic salts stablizer, thickening material and adjusting pH value and make 50～70 ℃ emulsifier solution, and measure standby; Open bitumen emulsifying plant, add emulsifier solution behind preheating 30～60s, and then add pitch under the prerequisite of local boiling fast preventing, and then add rubber powder fast and carry out emulsification, emulsification times is 30～120s.
The third, first emulsified rubber powder, reemulsification pitch: metering was standby after pitch was heated to 120～160 ℃; Add fully to stir in the hot water behind the auxiliary agent dosage with emulsifying agent, inorganic salts stablizer, thickening material and adjusting pH value and make 50～70 ℃ emulsifier solution, and measure standby; Open bitumen emulsifying plant, add emulsifier solution behind preheating 30～60s, and then add rubber powder, add pitch under the prerequisite of local boiling fast and carry out emulsification preventing then, emulsification times is 30～120s.
Prepared rubber powder-the bitumen emulsion of the present invention is compared with common emulsified asphalt, has following characteristics: (1) is because the present invention makes full use of solid waste--and rubber powder has the characteristics of environmental protection and energy saving; (2) make the CA mortar stability be improved significantly; (3) because the market value of rubber powder is lower than pitch, make the price of rubber powder-bitumen emulsion be lower than the price of common emulsified asphalt, because effect and the pitch of equivalent of rubber powder in the CA mortar is suitable, therefore, preparing the CA mortar with rubber powder-bitumen emulsion can reduce cost again.
Specific embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to following examples, wherein table 1 is the embodiment proportioning, table 2 has provided the type of raw materials that embodiment adopted, and table 3 has provided the preparation method that each embodiment adopted.
Table 1 embodiment proportioning
| Numbering | Proportioning (mass percent) | ||||||
| Pitch | Rubber powder | Water | Emulsifying agent | Stablizer | Thickening material | The auxiliary agent of pH value | |
| Comparative Examples 1 | 60 | 0 | 37.9 | 1.5 | 0.3 | 0.2 | 0.1 |
| Embodiment 1 | 50 | 10 | 37.9 | 1.5 | 0.3 | 0.2 | 0.1 |
| Embodiment 2 | 40 | 20 | 37.9 | 1.5 | 0.3 | 0.2 | 0.0 |
| Embodiment 3 | 30 | 30 | 37.9 | 1.5 | 0.3 | 0.2 | 0.0 |
| Embodiment 4 | 20 | 40 | 37.9 | 1.5 | 0.3 | 0.2 | 0.1 |
| Embodiment 5 | 35 | 15 | 49.23 | 0.3 | 0.2 | 0.12 | 0.15 |
| Embodiment 6 | 25 | 30 | 42.58 | 2.0 | 0.15 | 0.15 | 0.12 |
| Embodiment 7 | 55 | 8 | 35.37 | 0.8 | 0.4 | 0.25 | 0.18 |
| Embodiment 8 | 45 | 20 | 31.72 | 2.8 | 0.25 | 0.15 | 0.0 |
The type of raw materials of table 2 embodiment
| Numbering | Pitch | Rubber powder | Emulsifying agent | Stablizer | Thickening material | The auxiliary agent of pH value |
| Comparative Examples 1 | Petroleum pitch, AH-70 | 120 orders | Anionic | Water glass | The acrylic acid or the like gelatin | Sodium hydroxide |
| Embodiment 1 | Petroleum pitch, AH-90 | 120 orders | Cationic | Ammonium chloride | Polyvinyl alcohol | Hydrochloric acid |
| Embodiment 2 | Petroleum pitch, AH-70 | 120 orders | Anionic | Sodium sulfate | Carboxymethyl cellulose | -- |
| Embodiment 3 | Rock asphalt, AH-70 | 120 orders | Anionic | Yellow soda ash | Polyvinyl alcohol | -- |
| Embodiment 4 | Rock asphalt, AH-90 | 120 orders | Anionic+non-ionic type | Water glass | Methylcellulose gum | Potassium hydroxide |
| Embodiment 5 | Petroleum pitch, AH-90 | 80 orders | Cationic+non-ionic type | Sodium-chlor | Methylcellulose gum | Acetate |
| Embodiment 6 | Petroleum pitch, AH-70 | 160 orders | Cationic | Iron(ic) chloride | Polyvinyl alcohol | Tartrate |
| Embodiment 7 | Rock asphalt, AH-70 | 200 orders | Cationic | Aluminum chloride | Methylcellulose gum | Formic acid |
| Embodiment 8 | Rock asphalt, AH-90 | 100 orders | Anionic | Sodium sulfate | Treated starch | -- |
The preparation method of table 3 embodiment
| Numbering | Preparation method's kind | Asphalt temperature/℃ | The emulsifier solution temperature/℃ | Warm up time/s | Emulsification times/s |
| Comparative Examples 1 | The third | 140 | 55 | 30 | 50 |
| Embodiment 1 | First kind | 130 | 60 | 30 | 70 |
| Embodiment 2 | Second kind | 150 | 50 | 40 | 60 |
| Embodiment 3 | The third | 145 | 55 | 50 | 90 |
| Embodiment 4 | First kind | 130 | 65 | 60 | 120 |
| Embodiment 5 | Second kind | 125 | 65 | 30 | 80 |
| Embodiment 6 | The third | 145 | 50 | 40 | 100 |
| Embodiment 7 | First kind | 135 | 60 | 50 | 60 |
| Embodiment 8 | Second kind | 135 | 55 | 60 | 90 |
The rubber powder that makes with embodiment 1～embodiment 8--bitumen emulsion preparation CA mortar (proportioning sees Table 4), in order to make test-results have comparability, carrying out proportioning when design, making that each proportioning medium pitch equates with the consumption of rubber powder quality sum and water in the table 4.
Table 4 CA mortar mix ratio and type of raw materials thereof
| Numbering | Rubber powder-bitumen emulsion kind | Proportioning (mass fraction) | Raw-material specification or type | |||||
| Cement | Bitumen emulsion | Sand | Water | Aluminium powder | Defoamer | |||
| R1 | Comparative Examples 1 | 100 | 156 | 195 | 35 | 0.3 | 0.12 | Cement: 42.5 grades of early-strength type silicate cements; Sand: river sand, fineness modulus 1.6; Aluminium powder: iron level≤0.8%, lead content≤0.03%, fineness satisfies water-covering capacity 〉=1350m 2/ kg; Defoamer: silicone based. |
| A1 | Embodiment 1 | 100 | 156 | 195 | 35 | 0.3 | 0.12 | |
| A2 | Embodiment 2 | 100 | 156 | 195 | 35 | 0.3 | 0.12 | |
| A3 | Embodiment 3 | 100 | 156 | 195 | 35 | 0.3 | 0.12 | |
| A4 | Embodiment 4 | 100 | 156 | 195 | 35 | 0.3 | 0.12 | |
| A5 | Embodiment 5 | 100 | 187 | 195 | 2 | 0.3 | 0.12 | |
| A6 | Embodiment 6 | 100 | 170 | 195 | 22 | 0.3 | 0.12 | |
| A7 | Embodiment 7 | 100 | 149 | 195 | 42 | 0.3 | 0.12 | |
| A8 | Embodiment 8 | 100 | 144 | 195 | 49 | 0.3 | 0.12 | |
The preparation method of R1 and A1-A8 and step are in the table 4: adopt glue sand agitator that " Test method for strength of hydraulic cement mortar " (GB/T17671-1999) stipulate to add bitumen emulsion → water → siccative (sand that mixes, cement,, aluminium powder, defoamer) successively under condition of stirring at a slow speed, siccative adds the back and stirs 3min fast, and then stirs 1min at a slow speed.
After the mortar moulding for preparing, carry out degree of mobilization, operable time, air content, unit volume quality, ultimate compression strength, Young's modulus, resolution, rate of expansion, bleeding rate, the frost resistance test of CA mortar according to the test method that " railroad track design specifications " (TB10082-2005) stipulated.The test methods and procedures that the weathering resistance of CA mortar adopts is:
(1) with the CA mortar of the qualified system of mixing of slump test after 10 minutes, inject the model of 40 * 40 * 160mm, 8 groups of test specimens of once shaped, every group of sample number is 3.
(2) the test specimen normal curing is after 28 days, and wherein 4 groups of test specimens are put into quick anti-marquis's proofing box (light source: 6000W water-cooled tubulose xenon lamp; The distance of test specimen and light source: 35～40cm; 60 ± 2 ℃ of working spaces's air themperature; Relative humidity: 70 ± 5%RH; The simulated rainfall cycle: the every irradiation of sample 1 hour, rainfall 9 minutes) specimen holder frame, and it is inserted on the rotary drum, machine by the working specification of growth cabinet, to test by test conditions, irradiation time is 500h.Simultaneously other 4 groups contrast test specimen is continued to place 20 ± 3 ℃, carry out normal curing in the environment of 65 ± 5%RH.
(3) when irradiation time respectively 0,100,300, during 500h, respectively to illuminated test specimen and with the length of time not irradiated standard specimen carry out bending test, check the appearance change situation of test specimen simultaneously.
(4) be calculated as follows the relative folding strength of different irradiation time CA mortar specimens:
In the formula: R
tThe folding strength value of the illuminated test specimen of---different irradiation time, MPa;
R
0The folding strength value of---identical period normal curing test specimen, MPa;
The relative folding strength of the different irradiation time test specimens of R---, %.
Wherein the relative folding strength value of sample is got the arithmetical av of every group of three relative folding strengths of test specimen.
List performance in the table 5 with the CA mortar of Comparative Examples 1 and embodiment 1～embodiment 8 preparations.
Table 5 CA mortar performance index request and embodiment test-results
| Sequence number | Project | Index request | R1 | A1 | A2 | A3 | A4 | A5 | A6 | A7 | A8 | |
| 1 | Mortar temperature/℃ | 5～30 | 23 | 24 | 25 | 24 | 23 | 26 | 20 | 22 | 25 | |
| 2 | Degree of mobilization/second | 16～26 | 20 | 19 | 17 | 19 | 18 | 20 | 21 | 18 | 20 | |
| 3 | Operable time/minute | ≥30 | 60 | 65 | 70 | 75 | 80 | 90 | 100 | 100 | 95 | |
| 4 | Air content/% | 8～12 | 9.4 | 9.0 | 8.8 | 9.4 | 9.6 | 9.0 | 9.8 | 9.2 | 8.5 | |
| 5 | The unit volume quality | ＞1.3 | 1.53 | 1.50 | 1.51 | 1.52 | 1.48 | 1.47 | 1.46 | 1.45 | 1.43 | |
| 6 | Ultimate compression strength/MPa | 1d | ＞0.1 | 0.27 | 0.25 | 0.28 | 0.24 | 0.18 | 0.16 | 0.17 | 0.15 | 0.16 |
| 7d | ＞0.7 | 1.25 | 1.36 | 1.26 | 1.08 | 1.05 | 1.04 | 1.00 | 0.84 | 0.80 | ||
| 28d | 1.8～2.5 | 2.40 | 2.32 | 2.22 | 2.40 | 2.10 | 1.98 | 2.00 | 1.98 | 1.88 | ||
| 7 | Young's modulus/MPa | 200-600 | 580 | 570 | 560 | 550 | 480 | 460 | 440 | 320 | 330 | |
| 8 | Material separation degree/% | ＜3 | 2.8 | 1.8 | 2.5 | 2.2 | 2.1 | 0.6 | 0.9 | 1.3 | 1.8 | |
| 9 | Rate of expansion/% | 1～3 | 1.8 | 2.1 | 2.0 | 2.3 | 1.2 | 1.5 | 1.6 | 2.5 | 2.2 | |
| 10 | Bleeding rate/% | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| 11 | Frost resistance (behind 300 freezing and thawing tests) | Modulus 〉=60% of moving relatively | 86 | 89 | 94 | 93 | 90 | 88 | 92 | 90 | 89 | |
| Mass loss rate≤5% | 0.6 | 0.3 | 0.2 | 0.1 | 0.0 | 0.8 | 0.1 | 0.0 | 0.1 | |||
| 12 | Weathering resistance (behind the irradiation 500h) | Outward appearance is no abnormal | Do not have | Do not have | Do not have | Do not have | Do not have | Do not have | Do not have | Do not have | Do not have | |
| Relative folding strength 〉=100% | 102 | 105 | 109 | 114 | 118 | 106 | 114 | 104 | 110 | |||
As can be seen from Table 5, use rubber powder--bitumen emulsion preparation CA mortar, can obviously improve the weathering resistance of CA mortar, and rubber powder content is high more in rubber powder-bitumen emulsion, the weathering resistance of CA mortar is good more, in volume scope of the present invention, rubber powder all has no adverse effect to performances such as the workability of CA mortar, intensity, Young's modulus, resolution, rate of expansion, bleeding rate, frost resistances.
Claims (10)
1. rubber powder-bitumen emulsion that is used for cement asphalt mortar is characterized in that by following components in mass portion number formulated:
Emulsifying agent: 0.1～3%, pitch: 20～60%, rubber powder: 5～40%, stablizer: 0.1～0.5%, thickening material: the auxiliary agent of 0.1～0.3%, regulating the pH value: 0-0.2%, surplus is a water.
2. rubber powder-the bitumen emulsion that is used for cement asphalt mortar as claimed in claim 1 is characterized in that described pitch is rock asphalt or petroleum pitch.
3. rubber powder-the bitumen emulsion that is used for cement asphalt mortar as claimed in claim 1 is characterized in that described emulsifying agent is that a kind of in a kind of or cationic, the anionic in cationic, the anionic is composited with arbitrary proportion with non-ionic type.
4. rubber powder-the bitumen emulsion that is used for cement asphalt mortar as claimed in claim 1 is characterized in that described rubber powder is processed by waste old, its fineness 〉=80 orders;
5. rubber powder-the bitumen emulsion that is used for cement asphalt mortar as claimed in claim 1 is characterized in that described stablizer is inorganic salt, is selected from vitriol, carbonate, hydrochloride; When adopting positively charged ion or positively charged ion and nonionic Compositional type emulsifying agent, stablizer is selected from ammonium chloride, sodium-chlor, calcium chloride, magnesium chloride, iron(ic) chloride, aluminum chloride; When adopting negatively charged ion or negatively charged ion and nonionic Compositional type emulsifying agent, stablizer is selected from sodium sulfate, yellow soda ash, water glass.
6. rubber powder-the bitumen emulsion that is used for cement asphalt mortar as claimed in claim 1, it is characterized in that described thickening material and dissimilar emulsifying agent are composite has a selectivity, when adopting cationic or positively charged ion and nonionic Compositional type emulsifying agent, thickening material is selected from and is neutral polyvinyl alcohol or methylcellulose gum in water; When adopting anionic or negatively charged ion and nonionic Compositional type emulsifying agent, thickening material is selected from polyvinyl alcohol, methylcellulose gum, carboxymethyl cellulose, treated starch or acrylic acid or the like gelatin.
7. rubber powder-the bitumen emulsion that is used for cement asphalt mortar as claimed in claim 1, it is characterized in that when emulsifying agent be cationic or when positively charged ion and nonionic Compositional type, the auxiliary agent of regulating ph value of emulsion is selected from phenylformic acid, formic acid, acetate, Succinic Acid, tartrate or hydrochloric acid, sulfuric acid, makes solution be acid; When emulsifying agent was anionic or negatively charged ion and nonionic Compositional type, the auxiliary agent of regulating ph value of emulsion was selected from potassium hydroxide, sodium hydroxide, yellow soda ash or water glass, made emulsion be alkalescence.
8. any described preparation method who is used for the rubber powder-bitumen emulsion of cement asphalt mortar of claim 1 to 7 is characterized in that earlier with rubber powder asphalt modification is carried out emulsification again, specifically comprises the steps:
1) adopt the method for rubber powder modified asphalt commonly used to make rubber powder modified asphalt, and metering is standby after being heated to 120～160 ℃;
2) make 50～70 ℃ emulsifier solution with fully stirring in the adding hot water behind the auxiliary agent dosage of emulsifying agent, inorganic salts stablizer, thickening material and adjusting pH value, and measure standby;
3) open bitumen emulsifying plant, add step 2 behind preheating 30～60s) emulsifier solution that makes, and then add rubber powder modified asphalt under the prerequisite of local boiling fast and carry out emulsification preventing, emulsification times is 30～120s.
9. any described preparation method who is used for the rubber powder-bitumen emulsion of cement asphalt mortar of claim 1 to 7 is characterized in that first emulsified bitumen, and the reemulsification rubber powder specifically comprises the steps:
1) pitch is heated to 120～160 ℃ after the metering standby;
2) make 50～70 ℃ emulsifier solution with fully stirring in the adding hot water behind the auxiliary agent dosage of emulsifying agent, inorganic salts stablizer, thickening material and adjusting pH value, and measure standby;
3) open bitumen emulsifying plant, add step 2 behind preheating 30～60s) emulsifier solution that makes, and then add pitch under the prerequisite of local boiling fast preventing, and then add rubber powder fast and carry out emulsification, emulsification times is 30～120s.
10. any described preparation method who is used for the rubber powder-bitumen emulsion of cement asphalt mortar of claim 1 to 7 is characterized in that first emulsified rubber powder, and reemulsification pitch specifically comprises the steps:
1) pitch is heated to 120～160 ℃ after the metering standby;
2) make 50～70 ℃ emulsifier solution with fully stirring in the adding hot water behind the auxiliary agent dosage of emulsifying agent, inorganic salts stablizer, thickening material and adjusting pH value, and measure standby;
3) open bitumen emulsifying plant, add emulsifier solution behind preheating 30～60s, and then add rubber powder, add pitch under the prerequisite of local boiling fast and carry out emulsification preventing then, emulsification times is 30～120s.
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| CN101475349B (en) * | 2009-01-21 | 2012-08-08 | 中国铁道科学研究院铁道建筑研究所 | Vertical connected plate type unballasted track cement emulsified bitumen mortar |
| CN102660125A (en) * | 2012-05-16 | 2012-09-12 | 中胶橡胶资源再生有限公司 | Preparation method of waste rubber modified emulsified asphalt |
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