CN105860552A - Low-temperature preparation method of environment-friendly rubber asphalt - Google Patents
Low-temperature preparation method of environment-friendly rubber asphalt Download PDFInfo
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- CN105860552A CN105860552A CN201610231507.7A CN201610231507A CN105860552A CN 105860552 A CN105860552 A CN 105860552A CN 201610231507 A CN201610231507 A CN 201610231507A CN 105860552 A CN105860552 A CN 105860552A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/28—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/28—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control
- B29B7/286—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control measuring properties of the mixture, e.g. temperature, density
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a low-temperature preparation method of environment-friendly rubber asphalt, and relates to a preparation method of rubber asphalt. In the wet rubber asphalt production process, the preparation temperature is 185 DEG C, the production cost is increased, and a larger amount of energy consumption and discharge of a large amount of smoke, dust and waste gas can be caused; a high-temperature preparation method can cause aging of asphalt cement, and long-term performance of rubber asphalt is affected. The low-temperature preparation method comprises the six steps of weighing, constant-temperature heating, water removing, pouring of matrix asphalt into a stirring vessel, heating and blending. According to the low-temperature preparation method of the environment-friendly rubber asphalt, the preparation temperature of the rubber asphalt is decreased in the operation process, and therefore the energy consumption and discharge of smoke and dust and waste gas can be effectively reduced; environmental protection is promoted; the low-temperature preparation method of the environment-friendly rubber asphalt is used for preparing the rubber asphalt.
Description
Technical field
Present invention relates particularly to the low temperature preparation method of a kind of environment-friendly rubber pitch.
Background technology
China's highway is in the period developed rapidly in recent years, bituminous paving as one of highway pavement material,
Leading position is played in expressway works construction.Meanwhile, along with our people's growth in the living standard and highway transportation
The fast development of industry, junked tire is as the biggest discarded object of Communication and Transportation Engineering field yield, due to quantity and day
All increasing and deal with the environmental problem brought improperly and problem of resource waste is on the rise, junked tire is piled up and is caused " black pollution "
Become the environmental problem that countries in the world generally face.Mainly there are renovation, grain bin in current China for the processing mode of junked tire
Amass, burn and the mode such as landfill.Wherein the accumulation of junked tire can cause growing of parasite and mosquito, thus accelerates disease
Propagation rate；Burning can produce serious disaster hidden-trouble, produces many toxic smogs；Landfill not only can occupy a large amount of soil,
Also can cause the pollution of underground water, vegeto-animal living environment is caused immeasurable destruction.2013, China was waste and old
The yield of tire is 10,800,000 tons, and with the speed increment of annual about 5%-6%, it is contemplated that the product of the year two thousand twenty junked tire
Amount is up to 20,000,000 tons.Junked tire comprehensive utilization becomes current China problem demanding prompt solution.
Due in junked tire raw material containing multiple high molecular polymers such as abundant butadiene-styrene rubber, natural rubber and all kinds of
Additive and part age resister, have preferable performance and stability, has its distinctive mechanics and temperature characterisitic, quilt simultaneously
It is applied to the preparation of rubber asphalt.Rubber asphalt be by matrix pitch, powdery or graininess rubber powder of waste tire and some add
Add agent composition, prepare Crumber rubber modified asphalt material by unique physics and chemical processing technology.Rubber powder of waste tire changes
Property pitch for the existing 20 years history of road engineering, the environment-friendly advantage superior due to it and good pavement performance, the most progressively
Road engineering at home is applied.The good high temperature performance of rubber powder and the compatibility good with pitch, protect
Demonstrate,prove rubber asphalt and compound thereof compared to generic media pitch and compound thereof, there is good thermally-stabilised and opposing rut
The ability of deformation, is provided simultaneously with low temperature flexibility and the anti-crack ability highlighted.Owing to waste tire rubber having substantial amounts of antioxygen
Agent, heat stabilizer, ultra-violet absorber, and aiming screen covers highly effective carbon black filler so that rubber asphalt
Ageing resistance is also able to huge lifting.For its compound, there are some distinctive pavement performances, be mainly manifested in
Good anti-fatigue ability, resisting temperature crack ability, antireflection ability, high temperature stability performance and water stability the most typically drip
Blue or green road surface to be got well.Additionally, Rubber-Asphalt Pavement also has a good decrease of noise functions, and due to the depositing of carbon black in rubber grain
, it is possible to make road surface black RT longer, strengthen the contrast with roadmarking, improve while aesthetic road and travel
Security.
At present, in domestic and international road construction, the preparation temperature in wet method rubber asphalt production process typically takes 185 DEG C.?
Production process is heated to the highest temperature pitch, while increasing production cost, not only results in mass energy
Consume and the discharge of volume of smoke waste gas, had a strong impact on the life and health of environmental quality and workmen simultaneously.The highest
Production and construction temperature, the aging of bituminous cements can be caused, affect the Long-Term Properties of rubber-asphalt mixture.Limit
Made can the engineering time, especially in the relatively low area of long-term temperature.Do not meet National Sustainable Development Strategies and carry out section
Learn the specific requirement of the view of development.
Summary of the invention
It is an object of the invention to provide the low temperature preparation method of a kind of environment-friendly rubber pitch, to solve the production of wet method rubber asphalt
During preparation temperature be 185 DEG C, not only increase production cost, the consumption of mass energy and volume of smoke also can be caused to give up
The discharge of gas；The preparation method of high temperature can cause the aging of bituminous cements, affects the asking of Long-Term Properties of rubber asphalt
Topic.
The present invention solves that above-mentioned technical problem adopts the technical scheme that:
A kind of low temperature preparation method of environment-friendly rubber pitch, this preparation method follows the steps below:
Step one: weigh work: by mass fraction weigh matrix pitch 100 parts, rubber powder 20～35 parts, thinner 0.2～
0.5 part and auxiliary agent 3～7 parts；
Step 2: heated at constant temperature works: puts into weighing complete matrix pitch in step one in sample holder, then will be equipped with base
The sample holder of matter pitch is placed in constant temperature oven, is heated to regulation low temperature preparation temperature T；
Step 3: except water conservancy project is made: put drying 1 hour in 80 DEG C of baking ovens by weighing complete rubber powder in step one subsequently, go
Moisture removal；
Step 4: will be completely melt in step 2 and reach after the matrix pitch of regulation low temperature preparation temperature T fully mixes,
Being poured slowly in stirring container, the volume of the matrix pitch poured into is 1st/to two/3rd of stirring vessel volume；
Step 5: intensification heating work: thermostat temperature is set the preparation temperature T to regulation, preheats high speed shear simultaneously
The cutting head of machine, after being fully warmed-up, moves to stirring container heat up on temperature controllable heater, starts and cuts at a high speed
Cutting machine, during beginning, the rotating speed of high-speed shearing machine is 500r/min～1000r/min, behind 10～15min, by high speed shear
The rotating speed rotating speed of machine slowly regulates to 5000r/min, in this heating process, it is ensured that temperature sensor is immersed in stirring container all the time
In and temperature sensor not inwall with stirring container contact, strict monitoring temperature is to prevent from exceeding the flash-point of pitch；
Step 6: mix and stir work: during the high speed shear of high-speed shearing machine, the temperature of the matrix pitch in stirring container
Gradually heat up, when the temperature of matrix pitch rises to the difference away from regulation low temperature preparation temperature T equal to 15 DEG C, by step
One weighs in complete thinner and auxiliary agent instillation stirring container, and the rubber powder after then removing moisture removal in step 3 slowly falls
Entering and stir in container, throwing limit, limit is stirred, and after rubber powder all puts into, controls mix temperature at regulation low temperature preparation temperature
T, stirs 60～90 minutes uniformly with 5000r rotating speed, and high speed shear terminates rear gained mixture and is rubber asphalt.
The method have the advantages that
1, design science of the present invention is rationally and step simplifies, by adding matrix pitch, rubber powder, fall in order and quantitatively
Stick and auxiliary agent, it is possible to realize preparing rubber asphalt at low ambient temperatures.
2, the present invention is compared with existing high temperature preparation method, on the one hand can effectively reduce consumption and the smoke exhaust of the energy
Discharge capacity, play energy-saving and emission-reduction, the effect of protection environment, the life and health of workmen can also be ensured simultaneously；Another
Aspect low temperature preparation method can alleviate the aging phenomenon of bituminous cements, ensures the Long-Term Properties of rubber asphalt.
3, can obtain through repeatedly sampling test, the quality being prepared rubber asphalt by the present invention is equivalent to prepared by high temperature
The quality of rubber asphalt or be better than the quality of rubber asphalt prepared by high temperature.
4, the present invention is affected less by ambient temperature, and effectively extend rubber asphalt can the engineering time.Fit simultaneously
With in extensive range, it is particularly suited for long-term temperature lower ground district.
Accompanying drawing explanation
Fig. 1 is the column comparison diagram that the present invention exhales pernicious gases during mixing and stirring with prior art；
Fig. 2 is rubber asphalt pernicious gas row in paving process that rubber asphalt prepared by prior art is prepared with the present invention
Column comparison diagram high-volume.
Detailed description of the invention
Technical solution of the present invention is not limited to act detailed description of the invention set forth below, and also include between each detailed description of the invention is any
Combination.
Detailed description of the invention one: combine Figure of description 1 and Fig. 2 and illustrate that present embodiment, present embodiment are according to following
Step is carried out:
Step one: weigh work: by mass fraction weigh matrix pitch 100 parts, rubber powder 20～35 parts, thinner 0.2～
0.5 part and auxiliary agent 3～7 parts；
Step 2: heated at constant temperature works: puts into weighing complete matrix pitch in step one in sample holder, then will be equipped with base
The sample holder of matter pitch is placed in constant temperature oven, is heated to regulation low temperature preparation temperature T；
Step 3: except water conservancy project is made: put drying 1 hour in 80 DEG C of baking ovens by weighing complete rubber powder in step one subsequently, go
Moisture removal；
Step 4: will be completely melt in step 2 and reach after the matrix pitch of regulation low temperature preparation temperature T fully mixes,
Being poured slowly in stirring container, the volume of the matrix pitch poured into is 1st/to two/3rd of stirring vessel volume；
Step 5: intensification heating work: thermostat temperature is set the preparation temperature T to regulation, preheats high speed shear simultaneously
The cutting head of machine, after being fully warmed-up, moves to stirring container heat up on temperature controllable heater, starts and cuts at a high speed
Cutting machine, during beginning, the rotating speed of high-speed shearing machine is 500r/min～1000r/min, behind 10～15min, by high speed shear
The rotating speed of machine slowly regulates to 5000r/min, in this heating process, it is ensured that temperature sensor all the time be immersed in stirring container in and
Temperature sensor does not contacts with the inwall stirring container, and strict monitoring temperature is to prevent from exceeding the flash-point of pitch；
Step 6: mix and stir work: during the high speed shear of high-speed shearing machine, the temperature of the matrix pitch in stirring container
Gradually heat up, when the temperature of matrix pitch rises to the difference away from regulation low temperature preparation temperature T equal to 15 DEG C, by step
One weighs in complete thinner and auxiliary agent instillation stirring container, and the rubber powder after then removing moisture removal in step 3 slowly falls
Entering and stir in container, throwing limit, limit is stirred, and after rubber powder all puts into, controls mix temperature at regulation low temperature preparation temperature
T, stirs 1 hour uniformly with 5000r rotating speed, and high speed shear terminates rear gained compound and is rubber asphalt.
The present invention is that one utilizes warm mix mode to realize, to rubber asphalt low temperature preparation method, reducing required for rubber asphalt
Preparation temperature, controls the preparation temperature of rubber asphalt at 150～165 DEG C, to reach to reduce the consumption of fuel, reduces strong
Health endangers, and simplifies the production routine of rubber asphalt, the service life of extension device, extends rubber asphalt and stores the time, overcomes
The seasonality of road construction and periodicity, effectively extend the engineering time of road pavement, make road construction have bigger spirit
Activity and operability, so that being more widely applied of rubber asphalt.
The matrix pitch that mesostroma pitch of the present invention is commonly used selected from road engineering.
The effect adding thinner in the present invention is to ensure that asphalt material has good mobility at a lower temperature, fall
Stick is existing procucts, and it is specially in road engineering conventional organic additive class and chemical addition agent series products.
In the present invention before carrying out rubber asphalt low temperature preparation process, it is desirable to have preamble process of the test: i.e. less by dosage
Sampling test, set the temperature value prepared of a low temperature, the preparation process of the sampling test that dosage is less and specific embodiment party
The process of formula one is in like manner.After the sample rubber pitch prepared, the sample rubber pitch that this process is prepared carry out needle penetration,
Softening point and the test of ductility, prepare the needle penetration of rubber asphalt, softening point and ductility to existing high temperature simultaneously and test,
Or directly utilize the high temperature having been described and prepare the data of the needle penetration of rubber asphalt, softening point and ductility, to by sample rubber
Pitch carries out needle penetration, softening point and ductility to be prepared the data of the needle penetration of rubber asphalt, softening point and ductility respectively and enters with temperature
Row contrasts, one by one so that it is determined that go out concrete numerical value and thinner, the volume of auxiliary agent of regulation low temperature preparation temperature T, i.e.
Properties of product and existing high temperature can be obtained at a temperature of Gai and after adding the volume of thinner, auxiliary agent prepare rubber asphalt and connect most
Closely, if it is lower to set regulation low temperature preparation temperature T temperature, such as less than 150 DEG C, thinner to be increased and helping
The volume of agent.After the volume of regulation low temperature preparation temperature T, thinner and auxiliary agent determines, i.e. can utilize these data
Carry out the preparation process of the present invention, it is achieved large batch of production.
The effect adding auxiliary agent in the present invention is to promote the reaction between rubber grain and asphalt component, to improve rubber asphalt
Pavement performance, and match with thinner and play synergy so that asphalt material has well stream at a lower temperature
Dynamic property, described auxiliary agent is existing procucts, and it is petroleum auxiliary agent or vegetable oil auxiliary agent.Petroleum auxiliary agent is petroleum refining process
Product obtained by, when auxiliary agent uses petroleum auxiliary agent, it is specially aromatic naphtha, naphthenic oil, machinery oil, transformation
Device oil, heavy oil or other material；When auxiliary agent uses vegetable oil auxiliary agent, it is various edible oil, and the present invention also increases to be had back
Receiving apparatus, is used for collecting above-mentioned two class oil contents, it is achieved environmental protection and the purpose of recycling waste.
Existing prepare rubber asphalt after when carrying out pollutant emission, the atmosphere pollution type that hot mixed rubber asphalt produces includes
CO2, combustion product and CO, VOC, benzene type organic and some dust-likes completely such as NOx, SOx and steam micro-
The imperfect combustion products such as particle.Show according to correlative study, when environment demeanour is 1L/min, under 160 DEG C of heating-up temperatures
Glance coal burst size compare 180 DEG C and decrease about 40%.In terms of energy resource consumption, at rubber grain volume and duration of mixing
In the case of Yi Zhi, heretofore described low temperature prepares rubber asphalt compared with conventional thermal mixed rubber asphalt, the saving of its energy
Be mainly reflected in heating-up temperature the most ibid, according to relevant parameter, so that it may calculate employing low-temperature fabrication theoretically raw
Produce the energy about 18.9% that the rubber asphalt of unit mass can be saved.
Owing to the performance of thinner used in preparation process and auxiliary agent will not change, during because producing asphalt, still
Can play the effect of warm mix, therefore, when producing rubber-asphalt mixture, its mix temperature mixes with common rubber asphalt
Material is compared, and still can reduce by 20～30 DEG C.Understand according to having both at home and abroad data measuring and calculating, 3% gather materials for utilizing moisture content to be
And heretofore described low temperature prepares the rubber-asphalt mixture that bitumen aggregate ratio is 5% that rubber asphalt produces, under the conditions of 160 DEG C,
47.2%, 46.3%, 32.4% is reduced respectively during glance coal, benzene DDGS, 3 kinds of pollutants of benzo [a] pyrene relatively 180 DEG C.
Consider to gather materials during mix heating consumed energy, pitch heating consumed energy and the middle moisture that gathers materials evaporation consumed energy time,
Compound per ton saves diesel oil about 55kg than corresponding conventional thermal mixed rubber asphalt mixture, saves energy consumption about 20.9%.
The drop temperature of the warm mix mode of the present invention is about 160 DEG C, and it is about 180 DEG C that heat mixes the drop temperature of mode.Under
Table one is the contrast number that warm mix mode and the existing heat of the present invention drawn through test of many times mixes noxious gas emission in mode
According to table:
Table one
By table one, by the preparation method of the warm mix mode of the present invention, the pernicious gas given off is substantially reduced,
Wherein relevant to greenhouse gases carbon dioxide and the discharge capacity of nitrogen oxides reduce by 60.0% and 72.6% respectively, sulfur dioxide
75.2% and 47.9% is have dropped the most respectively after using the present invention with the discharge capacity of flue dust.
All can illustrate that the present invention can effectively and the discharge of pernicious gas is greatly lowered according to Figure of description 1 and table 1
Amount.
Rubber-asphalt mixture prepared by the rubber-asphalt mixture that table two is prepared for prior art and the present invention is at paving process
The Data Comparison table of the discharge capacity of middle pernicious gas:
Table two
The structure tested by table two and Figure of description 2, uses rubber-asphalt mixture prepared by the present invention at stand
The glance coal given off during paving is substantially reduced, and the discharge capacity of benzene DDGS and benzo [a] pyrene is all reduced to more than 80%,
The effectively explanation present invention can effectively reduce the generation of glance coal, improves the working environment of workmen, beneficially ring greatly
Border is protected, and has the environment protecting of energy-saving and emission-reduction.
The present invention can operate by procedure below: is heated by matrix pitch in the way of known to relevant industries personnel
To 150～165 DEG C, secondly add one or more thinners and one or more auxiliary agents and stir, then putting into rubber
Rubber powder uses normal agitation or uses the mode known to other relevant industries personnel such as high-speed shearing equipment or employing colloid mill to mix
With 60～90 minutes, finally prepare the rubber asphalt of high-quality, it is achieved prepared by the low temperature of rubber asphalt.
The process of the rubber asphalt detection performance by preparing the present invention is as follows: the rapid molding of rubber asphalt that will prepare,
According to JTGE20-2011 " highway engineering pitch and Asphalt Mixture Experiment code ", carry out indoor needle penetration, ductility and
Softening point test,
Carrying out Asphalt Penetration experiment according to code T0604 method, the experimental temperature of employing is 25 DEG C.With the parallel examination of sample
Test at least 3 times.
Carrying out bitumen ductility test according to code T0605 method, the experimental temperature of employing is 5 DEG C, and rate of extension uses
1cm/min to 0.5cm/min.The each parallel test of same sample is no less than 3.
Bituminous softening-point test, also referred to as ring and ball method is carried out according to code T0606 method.Same parallel experiment of sample at least 2
Secondary.
Detailed description of the invention two: present embodiment is further illustrating of detailed description of the invention one, specifies low in present embodiment
The span of temperature preparation temperature T is 160～170 DEG C.The regulation low temperature preparation temperature T mentioned in present embodiment is tool
Temperature T occurred in step 2, four, five and six in body embodiment one.
Detailed description of the invention three: present embodiment is further illustrating of detailed description of the invention one, specifies low in present embodiment
The span of temperature preparation temperature T is 155～165 DEG C.The regulation low temperature preparation temperature T mentioned in present embodiment is tool
Temperature T occurred in step 2, four, five and six in body embodiment one.
Detailed description of the invention four: present embodiment is further illustrating of detailed description of the invention two or three, drips in present embodiment
Green grass or young crops is 70# matrix pitch, 90# matrix pitch or 110# matrix pitch.The matrix pitch of these three type is that the industry is commonly used
Type, sampling test also realizes for above-mentioned pitch, strengthens the reliability of the present invention and feasibility.
Detailed description of the invention five: present embodiment is further illustrating of detailed description of the invention four, thinner in present embodiment
For chemical viscosity reduction agent.
Thinner in present embodiment is the combination of one or more of organic thinner in chemical viscosity reduction agent, in sampling test
Thinner is a kind of or the most several combination in Sasobit, Evotherm, APTL.
Detailed description of the invention six: present embodiment is further illustrating of detailed description of the invention one or five, helps in present embodiment
Agent is petroleum auxiliary agent or vegetable oil auxiliary agent.
Detailed description of the invention seven: present embodiment is further illustrating of detailed description of the invention six, temperature described in present embodiment
Degree sensor is sonde-type thermocouple temperature sensor.The model of sonde-type thermocouple temperature sensor is JCJ100TTZ.
According to beneficial effects of the present invention following example are described:
Embodiment one: the present embodiment follows the steps below:
Step one: weigh work: weigh matrix pitch 100 parts, rubber powder 25 parts, thinner 0.3 part by mass fraction
With auxiliary agent 4 parts；
Step 2: heated at constant temperature works: puts into weighing complete matrix pitch in step one in sample holder, then will be equipped with base
The sample holder of matter pitch is placed in constant temperature oven, is heated to regulation low temperature preparation temperature T；Set regulation low temperature preparation temperature T
It it is 160 DEG C；
Step 3: except water conservancy project is made: put drying 1 hour in 80 DEG C of baking ovens by weighing complete rubber powder in step one subsequently, go
Moisture removal；
Step 4: will be completely melt in step 2 and reach after the matrix pitch of regulation low temperature preparation temperature T fully mixes,
Being poured slowly in stirring container, the volume of the matrix pitch poured into is 1st/to two/3rd of stirring vessel volume；
Step 5: intensification heating work: thermostat temperature is set the preparation temperature T to regulation, preheats high speed shear simultaneously
The cutting head of machine, after being fully warmed-up, moves to stirring container heat up on temperature controllable heater, starts and cuts at a high speed
Cutting machine, during beginning, the rotating speed of high-speed shearing machine is 800r/min, after 12min, is delayed by the rotating speed rotating speed of high-speed shearing machine
Slowly regulate to 5000r/min, in this heating process, it is ensured that temperature sensor is immersed in stirring container and temperature sensor all the time
The inwall with stirring container does not contacts, and strict monitoring temperature is to prevent from exceeding the flash-point of pitch；
Step 6: mix and stir work: during the high speed shear of high-speed shearing machine, the temperature of the matrix pitch in stirring container
Gradually heat up, when the temperature of matrix pitch rises to the difference away from regulation low temperature preparation temperature T equal to 15 DEG C, i.e. work as base
When the temperature rising of matter pitch reaches 145 DEG C, step one is weighed complete thinner and auxiliary agent instills in stirring container, so
After step 3 will be gone moisture removal after rubber powder be poured slowly into stirring container in, throwing limit, limit stir, when rubber powder all puts into
After, control mix temperature, at regulation low temperature preparation temperature T, to stir uniformly 70 minutes with 5000r rotating speed, cut at a high speed
After cutting end, gained mixture is rubber asphalt.
Embodiment two: the present embodiment follows the steps below:
Step one: weigh work: weigh matrix pitch 100 parts, rubber powder 30 parts, thinner 0.4 part by mass fraction
With auxiliary agent 6 parts；
Step 2: heated at constant temperature works: puts into weighing complete matrix pitch in step one in sample holder, then will be equipped with base
The sample holder of matter pitch is placed in constant temperature oven, is heated to regulation low temperature preparation temperature T；Set regulation low temperature preparation temperature T
It it is 155 DEG C；
Step 3: except water conservancy project is made: put drying 1 hour in 80 DEG C of baking ovens by weighing complete rubber powder in step one subsequently, go
Moisture removal；
Step 4: will be completely melt in step 2 and reach after the matrix pitch of regulation low temperature preparation temperature T fully mixes,
Being poured slowly in stirring container, the volume of the matrix pitch poured into is 1st/to two/3rd of stirring vessel volume；
Step 5: intensification heating work: thermostat temperature is set the preparation temperature T to regulation, preheats high speed shear simultaneously
The cutting head of machine, after being fully warmed-up, moves to stirring container heat up on temperature controllable heater, starts and cuts at a high speed
Cutting machine, during beginning, the rotating speed of high-speed shearing machine is 900r/min, after 14min, is delayed by the rotating speed rotating speed of high-speed shearing machine
Slowly regulate to 5000r/min, in this heating process, it is ensured that temperature sensor is immersed in stirring container and temperature sensor all the time
The inwall with stirring container does not contacts, and strict monitoring temperature is to prevent from exceeding the flash-point of pitch；
Step 6: mix and stir work: during the high speed shear of high-speed shearing machine, the temperature of the matrix pitch in stirring container
Gradually heat up, when the temperature of matrix pitch rises to the difference away from regulation low temperature preparation temperature T equal to 15 DEG C, i.e. work as base
When the temperature rising of matter pitch reaches 140 DEG C, step one is weighed complete thinner and auxiliary agent instills in stirring container, so
After step 3 will be gone moisture removal after rubber powder be poured slowly into stirring container in, throwing limit, limit stir, when rubber powder all puts into
After, control mix temperature, at regulation low temperature preparation temperature T, to stir uniformly 75 minutes with 5000r rotating speed, cut at a high speed
After cutting end, gained mixture is rubber asphalt.
Embodiment three: the present embodiment follows the steps below:
1) sample holder that will be equipped with 70# matrix pitch is put in constant temperature oven, is heated to the pitch preparation temperature of regulation, quite
In 70# matrix pitch weight 20% rubber powder rubber powder put in 80 DEG C of baking ovens dry 1 hour, remove moisture removal.
2) weigh stainless steel stirring container and obtain quality m1, will be completely melt and reach the 70# matrix pitch of regulation preparation temperature
Fully after mixing, slowly to entering in stainless steel stirring container.The three of the matrix pitch poured into generally stirring container volume/
About one, must not exceed 1/2nd of stirring container volume.
3) matrix pitch and summation m of stirring container mass are weighed2, with m2And m1Difference as matrix pitch quality m3,
And calculate rubber powder quality m of its correspondence4, thinner quality m5And auxiliary agent quality m6。
4) thermostat temperature is set and sets the preparation temperature to regulation, and preheat the cutting head of high-speed shearing machine.Treat the most pre-
After heat, move to stirring container heat up on temperature controllable heater.Start high-speed shearing machine, be preferably during beginning
500r/min～1000r/min, to prevent starting current excessive, burns motor, afterwards rotating speed is slowly increased to 5000r/min.
In heating process, sonde-type thermocouple temperature sensor to be immersed in stirring container all the time, and sensor can not be with reaction vessel
Wall contacts, and strictly controls preparation temperature, observes temperature change at any time, prevents from exceeding the flash-point of pitch, produces danger.
5) owing to there being big calorimetric to produce during high speed shear, therefore when the temperature of matrix pitch is gradually heating to prepare away from regulation
During temperature 15 DEG C, by thinner and the auxiliary agent of definite quality, be i.e. equivalent to 70# matrix pitch weight 0.3% thinner
One and be equivalent to 70# matrix pitch weight 3.2% auxiliary agent instill to stirring container in, then by load weighted rubber
Powder slowly pours stirring container into, and throwing limit, limit is stirred, and prevents pitch splash from hurting sb.'s feelings.After rubber powder all puts into, by mix temperature
Degree controls the preparation temperature 165 DEG C in regulation, stirs 1 hour uniformly with 5000r rotating speed.High speed shear terminates rear gained
Mixture is rubber asphalt.
6) the rapid molding of rubber asphalt that will prepare, according to JTGE20-2011 " highway engineering pitch and asphalt
Testing regulations ", carry out indoor needle penetration, ductility and softening point test.
7) Asphalt Penetration experiment is carried out according to " highway engineering pitch and Asphalt Mixture Experiment code " T0604 method,
The experimental temperature used is 25 DEG C.With parallel experiment of sample at least 3 times.
8) carry out bitumen ductility test according to " highway engineering pitch and Asphalt Mixture Experiment code " T0605 method, adopt
Experimental temperature be 5 DEG C, rate of extension use 1cm/min ± 0.5cm/min.The each parallel test of same sample is no less than
3.
9) bituminous softening-point test is carried out according to " highway engineering pitch and Asphalt Mixture Experiment code " T0606 method.
Same parallel experiment of sample at least 2 times.
By the present embodiment to the testing result of rubber asphalt be its needle penetration mean value be 5.84mm, ductility mean value is
129mm, softening point mean value is 67.0 DEG C.And utilize existing high temperature preparation method to form pin in the rubber asphalt of equivalent and enter
Degree mean value is 6.16mm, and ductility mean value is 125.5mm, and softening point mean value is 67.2 DEG C such that it is able to effectively say
The performance of rubber asphalt prepared by the bright present invention is better than the performance of rubber asphalt prepared by high temperature.
Embodiment four:
1) sample holder that will be equipped with 90# matrix pitch is put in constant temperature oven, is heated to the pitch preparation temperature of regulation, quite
In 70# matrix pitch weight 20% rubber powder rubber powder put in 80 DEG C of baking ovens dry 1 hour, remove moisture removal.
2) weigh stainless steel stirring container and obtain quality m1, will be completely melt and reach the 70# matrix pitch of regulation preparation temperature
Fully after mixing, slowly to entering in stainless steel stirring container.The three of the matrix pitch poured into generally stirring container volume/
About one, must not exceed 1/2nd of stirring container volume.
3) matrix pitch and summation m of stirring container mass are weighed2, with m2And m1Difference as matrix pitch quality m3,
And calculate rubber powder quality m of its correspondence4, thinner quality m5And auxiliary agent quality m6。
4) thermostat temperature is set and sets the preparation temperature to regulation, and preheat the cutting head of high-speed shearing machine.Treat the most pre-
After heat, move to stirring container heat up on temperature controllable heater.Start high-speed shearing machine, be preferably during beginning
500r/min～1000r/min, to prevent starting current excessive, burns motor, afterwards rotating speed is slowly increased to 5000r/min.
In heating process, sonde-type thermocouple temperature sensor to be immersed in stirring container all the time, and sensor can not be with reaction vessel
Wall contacts, and strictly controls preparation temperature, observes temperature change at any time, prevents from exceeding the flash-point of pitch, produces danger.
5) owing to there being big calorimetric to produce during high speed shear, therefore when the temperature of matrix pitch is gradually heating to prepare away from regulation
During temperature 15 DEG C, by thinner and the auxiliary agent of definite quality, be i.e. equivalent to 70# matrix pitch weight 0.3% thinner
One, be equivalent to 70# matrix pitch weight 0.2% thinner two and be equivalent to the 3.5% of 70# matrix pitch weight
Auxiliary agent instills to stirring container, and then load weighted rubber powder is slowly poured into stirring container, and throwing limit, limit is stirred, and prevents drip
Blue or green splash is hurted sb.'s feelings.After rubber powder all puts into, mix temperature is controlled the preparation temperature 160 DEG C in regulation, with 5000r
Rotating speed stirs 1 hour uniformly.High speed shear terminates rear gained mixture and is rubber asphalt.
6) the rapid molding of rubber asphalt that will prepare, according to JTGE20-2011 " highway engineering pitch and asphalt
Testing regulations ", carry out indoor needle penetration, ductility and softening point test.
7) Asphalt Penetration experiment is carried out according to " highway engineering pitch and Asphalt Mixture Experiment code " T0604 method,
The experimental temperature used is 25 DEG C.With parallel experiment of sample at least 3 times.
8) carry out bitumen ductility test according to " highway engineering pitch and Asphalt Mixture Experiment code " T0605 method, adopt
Experimental temperature be 5 DEG C, rate of extension use 1cm/min ± 0.5cm/min.The each parallel test of same sample is no less than
3.
9) bituminous softening-point test is carried out according to " highway engineering pitch and Asphalt Mixture Experiment code " T0606 method.
Same parallel experiment of sample at least 2 times.
By the present embodiment to the testing result of rubber asphalt be its needle penetration mean value be 5.73mm, ductility mean value is
127mm, softening point mean value is 67.4 DEG C.And utilize existing high temperature preparation method to form pin in the rubber asphalt of equivalent and enter
Degree mean value is 6.16mm, and ductility mean value is 125.5mm, and softening point mean value is 67.2 DEG C such that it is able to effectively say
The performance of rubber asphalt prepared by the bright present invention is better than the performance of rubber asphalt prepared by high temperature.
Embodiment five: the detailed process of the present embodiment is as follows:
1) sample holder that will be equipped with 70# matrix pitch is put in constant temperature oven, is heated to the pitch preparation temperature of regulation, quite
In 70# matrix pitch weight 20% rubber powder rubber powder put in 80 DEG C of baking ovens dry 1 hour, remove moisture removal.
2) weigh stainless steel stirring container and obtain quality m1, will be completely melt and reach the 70# matrix pitch of regulation preparation temperature
Fully after mixing, slowly to entering in stainless steel stirring container.The three of the matrix pitch poured into generally stirring container volume/
About one, must not exceed 1/2nd of stirring container volume.
3) matrix pitch and summation m of stirring container mass are weighed2, with m2And m1Difference as matrix pitch quality m3,
And calculate rubber powder quality m of its correspondence4, thinner quality m5And auxiliary agent quality m6。
4) thermostat temperature is set and sets the preparation temperature to regulation, and preheat the cutting head of high-speed shearing machine.Treat the most pre-
After heat, move to stirring container heat up on temperature controllable heater.Start high-speed shearing machine, be preferably during beginning
500r/min～1000r/min, to prevent starting current excessive, burns motor, afterwards rotating speed is slowly increased to 5000r/min.
In heating process, sonde-type thermocouple temperature sensor to be immersed in stirring container all the time, and sensor can not be with reaction vessel
Wall contacts, and strictly controls preparation temperature, observes temperature change at any time, prevents from exceeding the flash-point of pitch, produces danger.
5) owing to there being big calorimetric to produce during high speed shear, therefore when the temperature of matrix pitch is gradually heating to prepare away from regulation
During temperature 15 DEG C, by thinner and the auxiliary agent of definite quality, be i.e. equivalent to 70# matrix pitch weight 0.3% thinner
One and be equivalent to 70# matrix pitch weight 4.2% auxiliary agent instill to stirring container in, then by load weighted rubber
Rubber powder slowly pours stirring container into, and throwing limit, limit is stirred, and prevents pitch splash from hurting sb.'s feelings.After rubber powder all puts into, by mix
Temperature controls the preparation temperature 160 DEG C in regulation, stirs 90 minutes uniformly with 5000r rotating speed.After high speed shear terminates
Gained mixture is rubber asphalt.
6) the rapid molding of rubber asphalt that will prepare, according to JTGE20-2011 " highway engineering pitch and asphalt
Testing regulations ", carry out indoor needle penetration, ductility and softening point test.
7) Asphalt Penetration experiment is carried out according to " highway engineering pitch and Asphalt Mixture Experiment code " T0604 method,
The experimental temperature used is 25 DEG C.With parallel experiment of sample at least 3 times.
8) carry out bitumen ductility test according to " highway engineering pitch and Asphalt Mixture Experiment code " T0605 method, adopt
Experimental temperature be 5 DEG C, rate of extension use 1cm/min ± 0.5cm/min.The each parallel test of same sample is no less than
3.
9) bituminous softening-point test is carried out according to " highway engineering pitch and Asphalt Mixture Experiment code " T0606 method.
Same parallel experiment of sample at least 2 times.
By the present embodiment to the testing result of rubber asphalt be its needle penetration mean value be 5.94mm, ductility mean value is
124mm, softening point mean value is 66.9 DEG C.And utilize existing high temperature preparation method to form pin in the rubber asphalt of equivalent and enter
Degree mean value is 6.16mm, and ductility mean value is 125.5mm, and softening point mean value is 67.2 DEG C such that it is able to effectively say
The performance of rubber asphalt prepared by the bright present invention is better than the performance of rubber asphalt prepared by high temperature.
Claims (7)
1. the low temperature preparation method of an environment-friendly rubber pitch, it is characterised in that: this preparation method is to enter according to following steps
Row:
Step one: weigh work: by mass fraction weigh matrix pitch 100 parts, rubber powder 20～35 parts, thinner 0.2～
0.5 part and auxiliary agent 3～7 parts；
Step 2: heated at constant temperature works: puts into weighing complete matrix pitch in step one in sample holder, then will be equipped with base
The sample holder of matter pitch is placed in constant temperature oven, is heated to regulation low temperature preparation temperature T；
Step 3: except water conservancy project is made: put drying 1 hour in 80 DEG C of baking ovens by weighing complete rubber powder in step one subsequently, remove
Moisture；
Step 4: by being completely melt in step 2 and reaching after the matrix pitch of regulation low temperature preparation temperature T fully mixes, slow
Slowly pouring in stirring container, the volume of the matrix pitch poured into is 1st/to two/3rd of stirring vessel volume；
Step 5: intensification heating work: thermostat temperature is set the preparation temperature T to regulation, preheats high speed shear simultaneously
The cutting head of machine, after being fully warmed-up, moves to stirring container heat up on temperature controllable heater, starts and cuts at a high speed
Cutting machine, during beginning, the rotating speed of high-speed shearing machine is 500r/min～1000r/min, behind 10～15min, by high-speed shearing machine
Rotating speed rotating speed slowly regulate to 5000r/min, in this heating process, it is ensured that temperature sensor all the time be immersed in stirring container in and
Temperature sensor does not contacts with the inwall stirring container, and strict monitoring temperature is to prevent from exceeding the flash-point of pitch；
Step 6: mix and stir work: during the high speed shear of high-speed shearing machine, the temperature of the matrix pitch in stirring container
Gradually heat up, when the temperature of matrix pitch rises to the difference away from regulation low temperature preparation temperature T equal to 15 DEG C, by step one
Weighing complete thinner and auxiliary agent instills in stirring container, the rubber powder after then removing moisture removal in step 3 is poured slowly into
In stirring container, throwing limit, limit is stirred, and after rubber powder all puts into, mix temperature is controlled at regulation low temperature preparation temperature T,
Stirring 60～90 minutes uniformly with 5000r rotating speed, high speed shear terminates rear gained mixture and is rubber asphalt.
The low temperature preparation method of a kind of environment-friendly rubber pitch the most according to claim 1, it is characterised in that: specify low
The span of temperature preparation temperature T is 160～170 DEG C.
The low temperature preparation method of a kind of environment-friendly rubber pitch the most according to claim 1, it is characterised in that: specify low
The span of temperature preparation temperature T is 155～165 DEG C.
4. according to the low temperature preparation method of a kind of environment-friendly rubber pitch described in Claims 2 or 3, it is characterised in that: drip
Green grass or young crops is 70# matrix pitch, 90# matrix pitch or 110# matrix pitch.
The low temperature preparation method of a kind of environment-friendly rubber pitch the most according to claim 4, it is characterised in that: thinner
For chemical viscosity reduction agent.
A kind of low temperature preparation method of environment-friendly rubber pitch, it is characterised in that: help
Agent is petroleum auxiliary agent or vegetable oil auxiliary agent.
The low temperature preparation method of a kind of environment-friendly rubber pitch the most according to claim 6, it is characterised in that: described temperature
Degree sensor is sonde-type thermocouple temperature sensor.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115785687A (en) * | 2022-12-22 | 2023-03-14 | 东南大学 | High-toughness high-viscosity modified asphalt and preparation method thereof |
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|---|---|---|---|---|
| CN102234188A (en) * | 2010-05-06 | 2011-11-09 | 同济大学 | Method for preparing environment-friendly warm mix asphalt |
| CN102321373A (en) * | 2011-08-17 | 2012-01-18 | 爱思开(北京)公路科技有限公司 | Warm mixed asphalt and preparation method thereof |
| CN103693896A (en) * | 2013-12-25 | 2014-04-02 | 上海浦东路桥建设股份有限公司 | Asphalt mixture capable of suppressing reflection cracks in road surface, and preparation method and application of asphalt mixture |
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2016
- 2016-04-14 CN CN201610231507.7A patent/CN105860552A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102234188A (en) * | 2010-05-06 | 2011-11-09 | 同济大学 | Method for preparing environment-friendly warm mix asphalt |
| CN102321373A (en) * | 2011-08-17 | 2012-01-18 | 爱思开(北京)公路科技有限公司 | Warm mixed asphalt and preparation method thereof |
| CN103693896A (en) * | 2013-12-25 | 2014-04-02 | 上海浦东路桥建设股份有限公司 | Asphalt mixture capable of suppressing reflection cracks in road surface, and preparation method and application of asphalt mixture |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115785687A (en) * | 2022-12-22 | 2023-03-14 | 东南大学 | High-toughness high-viscosity modified asphalt and preparation method thereof |
| CN115785687B (en) * | 2022-12-22 | 2024-04-09 | 东南大学 | High-toughness high-viscosity modified asphalt and preparation method thereof |
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Application publication date: 20160817 |