CN112900112B - Preparation method of acid and alkali resistant elastomer modified asphalt waterproof coiled material and waterproof coiled material - Google Patents
Preparation method of acid and alkali resistant elastomer modified asphalt waterproof coiled material and waterproof coiled material Download PDFInfo
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Abstract
The invention relates to a preparation method of an acid and alkali resistant elastomer modified asphalt waterproof coiled material. Relates to the technical field of preparation of novel waterproof rolls. The method comprises the following steps: adding polyethylene into a high-speed shearing machine for heating and melting, and respectively adding a first modifier and a coupling agent into the melted polyethylene to be stirred to obtain modified polyethylene; adding asphalt into a high-speed shearing machine for heating and melting, adding a plasticizer, a coupling agent and a second modifier into the melted asphalt, mixing and stirring to obtain a modified asphalt mixed material, conveying the modified asphalt to a screw extruder, adding a stabilizer, melting and extruding to obtain modified asphalt; conveying the modified polyethylene and the modified asphalt to a coating machine, and sequentially coating a lower isolation film layer, a lower modified asphalt layer, a base course layer, an upper modified asphalt layer and an upper isolation film layer to obtain the acid and alkali resistant elastomer modified asphalt waterproof coiled material; the waterproof coiled material prepared by the method has good acid and alkali resistance and stretchability.
Description
Technical Field
The invention relates to the technical field of novel waterproof coiled materials, in particular to a preparation method of an acid and alkali resistant elastomer modified asphalt waterproof coiled material and the waterproof coiled material.
Background
The waterproof coiled material is mainly used for building walls, roofs, tunnels, highways, subways, refuse landfills and the like, and plays a role in resisting external rainwater and underground water leakage. The waterproof coiled material is used as a first barrier for waterproofing of the whole project, is a waterproof first barrier of the whole project, plays a vital role in the whole project, and can be divided into three types of asphalt waterproof coiled materials, namely asphalt waterproof materials, high polymer modified waterproof coiled materials and synthetic polymer waterproof coiled materials according to main waterproof component materials.
In the prior art, the waterproof roll is a curlable sheet-shaped waterproof material prepared by dip-coating modified asphalt on a base tire (such as base paper and fiber fabric) and then spreading powdery or sheet-shaped isolation materials on the surface, but the compatibility of polyurethane elastomer in asphalt cannot be accurately controlled in the existing waterproof roll prepared by coating the modified asphalt, so that the acid-base resistance and tensile property of the prepared waterproof roll are not high, the quality of the prepared waterproof roll is not high, the use period is not long, and the resource waste is caused.
Disclosure of Invention
Therefore, the invention provides a preparation method of an acid and alkali resistant elastomer modified asphalt waterproof coiled material and the waterproof coiled material. The method is used for solving the problems that in the prior art, the compatibility of the polyurethane elastomer in the asphalt cannot be accurately controlled, so that the acid-base resistance and the tensile property of the prepared waterproof coiled material are not high, the quality of the prepared waterproof coiled material is not high, the using period is not long, and the resource waste is caused.
In order to achieve the purpose, the invention provides a preparation method of an acid and alkali resistant elastomer modified asphalt waterproof coiled material, which comprises the following steps:
step a, adding polyethylene into a high-speed shearing machine to be heated and melted, respectively adding a first modifier and a coupling agent into the melted polyethylene, and stirring to obtain modified polyethylene;
b, adding the asphalt into a high-speed shearing machine for heating and melting, adding a plasticizer, a coupling agent and a second modifier into the melted asphalt, mixing and stirring to obtain a modified asphalt mixed material, conveying the modified asphalt to a screw extruder, adding a stabilizer, melting and extruding to obtain modified asphalt;
c, conveying the modified polyethylene and the modified asphalt to a coating machine, and sequentially coating a lower isolation film layer, a lower modified asphalt layer, a base tire layer, an upper modified asphalt layer and an upper isolation film layer to obtain the acid and alkali resistant elastomer modified asphalt waterproof coiled material;
in step a, a modified polyethylene standard compatibility coefficient Pa0 is set in a central processor, when the modified polyethylene is prepared, the central processor detects the modified polyethylene compatibility in real time according to an ultrasonic probe and determines an actual modified polyethylene compatibility coefficient Pa, the central processor compares the actual modified polyethylene compatibility coefficient with the modified polyethylene standard compatibility coefficient, if Pa is greater than or equal to Pa0, the central processor determines that the modification of the modified polyethylene is completed, if Pa is less than Pa0, the central processor determines that the modification of the modified polyethylene is not completed, when the central processor determines that the modification of the modified polyethylene is not completed, the central processor compares the actual modified polyethylene compatibility coefficient Pa with the modified polyethylene standard compatibility coefficient Pa0 and calculates a difference Pa, the central processor selects a corresponding coupling agent addition amount according to the difference, adds a coupling agent to the modified polyethylene mixed material and detects the added coupling agent and re-compares the compatibility coefficient, and if Pa is less than Pa0, the central processor adds a cosolvent to the modified polyethylene mixed material;
the central processor is also provided with a standard modified asphalt compatibility coefficient Pb0 and an addition ratio Bb0 of each mixed material, when the modified asphalt is prepared, the central processor monitors the compatibility of the modified asphalt in real time according to an ultrasonic probe and determines an actual modified asphalt compatibility coefficient Pb, the central processor compares the actual modified asphalt compatibility coefficient with the standard modified asphalt compatibility coefficient, if Pb is less than Pb0, the central processor judges that the asphalt is not modified, if Pb is more than or equal to Pb0, the central processor judges that the asphalt is modified, when the central processor judges that the modified asphalt is modified, the central processor calculates a difference Pb between the actual modified asphalt compatibility coefficient Pb and the modified asphalt compatibility coefficient Pb0, and selects the corresponding addition ratio of the mixed materials according to the difference to adjust and increase the amount of each material until the modification is completed.
Further, in the step a, the first modifier is one of TPU resin and TPE resin, the cosolvent is one of sodium benzoate, sodium salicylate and p-aminobenzoic acid,
in the step b, the second modifier is TPU resin and MPU resin according to the mass fraction of 3:1, mixing the mixed materials or the TPE resin and the MPU resin according to the mass fraction of 3:1, and the stabilizer is a rare earth stabilizer.
Further, in step a, the central processor is also provided with a modified polyethylene compatibility coefficient difference and a coupling agent addition amount, the modified polyethylene compatibility coefficient difference includes a first modified polyethylene compatibility coefficient difference Pa1, a second modified polyethylene compatibility coefficient difference Pa2, a third modified polyethylene compatibility coefficient difference Pa3, a fourth modified polyethylene compatibility coefficient difference Pa4, an Δ Pa1 Pa2 less than an Δ Pa3, the coupling agents include a first coupling agent addition amount Qb1, a second coupling agent addition amount Qb2, a third coupling agent addition amount Qb3, a fourth coupling agent addition amount Qb4, a Qb1 less than an Qb2 less than an Qb3,
when Pa is less than Pa0, the central processor selects the corresponding coupling agent adding amount according to the actual compatibility coefficient difference Pa of the modified polyethylene to add the coupling agent into the high-speed shearing machine,
the patient is the Pa1, the medium-control processor is the patient with the disease, the medium-control processor is the patient with the disease, the patient is the patient with the disease, the medium-control processor is the patient with the disease,
when the Δ Pa2 is less than or equal to the Δ Pa3, the central processor selects the Δ Qb2 to add the coupling agent,
when the Δ Pa3 is less than or equal to the Δ Pa4, the central processor selects the Δ Qb3 to add the coupling agent,
when Δ Pa is Δ Pa4, the central processor selects the Δ Qb4 to increase the coupling agent.
Further, in the step a, the central control processor is further provided with cosolvent masses, wherein the cosolvent masses include a first cosolvent mass Mz1, a second cosolvent mass Mz2, a third cosolvent mass Mz3, a fourth cosolvent mass Mz4, mz1 < Mz2 < Mz3 < Mz4,
when the Qbi is added with the coupling agent and the stirring is finished, if Pa is less than Pa0, the central processor selects the corresponding cosolvent by mass according to the actual compatibility coefficient difference Pa of the modified polyethylene,
when the Δ Pa1 is less than or equal to the Δ Pa2, the central control processor adds a cosolvent with the mass of Mz1 into the high-speed shearing machine,
when the Δ Pa2 is less than or equal to the Δ Pa3, the central control processor adds a cosolvent with the mass of Mz2 into the high-speed shearing machine,
when the Δ Pa3 is less than or equal to Pa4, the central processor adds a cosolvent with the mass of Mz3 into the high-speed shearing machine,
when Δ Pa >, pa4, the central control processor adds Mz4 mass of cosolvent to the high-speed shearing machine.
Further, in the step b, a mixture mass ratio is set in the central processing unit, the mixture mass ratio includes a first mixture mass ratio Ba1, a second mixture mass ratio Ba2, a third mixture mass ratio Ba3, and a fourth mixture mass ratio Ba4, and for the ith mixture mass ratio Bai, ai: zi: qi: gi, setting i =1,2,3,4, where Ai is the asphalt mass, zi is the plasticizer mass, qi is the coupling agent mass, gi is the second modifier mass,
when preparing modified asphalt, the central control processor determines the quality of the plasticizer, the quality of the coupling agent and the quality of the second modifier according to the quality of the asphalt added into the high-speed shearing machine.
Further, as for the addition proportion of the mixed materials and the difference of the compatibility coefficients of the modified asphalt, the addition proportions of the mixed materials comprise a first mixed material addition proportion Bb1, a second mixed material addition proportion Bb2, a third mixed material addition proportion Bb3 and a fourth mixed material addition proportion Bb4, wherein the addition proportion Bai of the ith mixed material is as follows: Δ Zi: tan Qi: Δ Ai is the addition amount of the asphalt, Δ Zi is the addition amount of the plasticizer, Δ Qi is the addition amount of the coupling agent, gi is the addition amount of the second modifier, the difference of the compatibility coefficients of the modified asphalt comprises a first modified asphalt compatibility coefficient Δ Pb1, a second modified asphalt compatibility coefficient difference Δ Pb2, a third modified asphalt compatibility coefficient difference Δ Pb3, a fourth modified asphalt compatibility coefficient difference Δ Pb2 less than Δ Pb4,
when Pb is less than Pb0, the central control processor calculates the compatibility coefficient of the actual modified asphalt and compares the compatibility coefficient of the actual modified asphalt with the standard compatibility coefficient of the modified asphalt, the central control processor selects the corresponding addition proportion of the mixed materials according to the compatibility difference Pb of the modified asphalt to add the materials to the high-speed shearing machine to adjust the compatibility of the modified asphalt,
when the Δ Pb1 is less than or equal to the Δ Pb2, the central processor selects the Bb1 to add each material into the mixed material,
if the Pb2 is less than or equal to Pb3, the central processor adds the Bb2 to the mixture,
if the Pb3 is less than or equal to Pb4, the central processor is to add the Bb3 to the mixture,
when the Δ Pb is more than Pb4, the central processor selects Bb4 to add the materials into the mixed material.
Further, the central control unit is also provided with a maximum addition amount Pb 'of mixed materials, when the central control processor adds each material to the mixed materials in a mixed material addition amount proportion Bbi, the central control processor calculates a sum of the addition amounts of the materials, and if the sum of the addition amounts of the materials is greater than the maximum addition amount Pb' of the mixed materials, the central control processor controls a replacement mixed material addition amount proportion.
Further, when the central processor controls the proportion of the mixed materials to be replaced, if the sum of the mass of each material in each proportion of the mass of the mixed materials is greater than the maximum addition amount Pb' of the mixed materials, the central processor controls and adjusts the stirring speed and the ultrasonic frequency of the high-speed shearing machine or adjusts and increases the stirring time.
The invention further provides an acid and alkali resistant elastomer modified asphalt waterproof coiled material prepared by the preparation method, which is characterized by comprising a lower isolation film layer, a lower modified asphalt layer, a base course layer, an upper modified asphalt layer and an upper isolation film layer, wherein the lower isolation film layer and the upper isolation film layer are made of modified polyethylene, and the base course layer is made of polyester fiber or glass fiber polyester felt.
Further, the lower isolation film layer is 0.2-1 mm, the lower modified asphalt layer is 1-2 mm, the base layer of the tire is 0.2-0.9 mm, the upper modified asphalt layer is 1-2 mm, and the upper isolation film layer is 0.2-1 mm.
Compared with the prior art, the preparation method has the beneficial effects that when the modified polyethylene is prepared, the standard compatibility coefficient of the modified polyethylene in the central processor is used, the compatibility coefficient of the modified polyethylene is detected and calculated in real time in the preparation and stirring processes according to the ultrasonic probe, whether the modification of the polyethylene is completed or not is judged according to the compatibility coefficient, if the modification is not completed, a certain amount of coupling agent and/or cosolvent are added, the crosslinking degree of the modifying agent and the polyethylene in the preparation process is improved, the quality of the modified polyethylene is further improved, and the quality of the waterproof coiled material is further improved.
When the modified asphalt is prepared, the standard compatibility coefficient of the modified asphalt in the central control processor is compared with the standard compatibility coefficient of the modified asphalt through actual measurement, if the compatibility of the comparison result does not meet the requirement, the central control processor adds materials into the modified asphalt mixture according to the selected addition proportion, the crosslinking degree of the modifier and the asphalt is improved through controlling the compatibility of the modified asphalt mixture, the quality of the modified asphalt is further improved, and the quality of the waterproof coiled material is further improved.
Further, when preparing modified polyethylene, selecting TPU resin or TPE resin as a first modifier, wherein the TPU resin or TPE resin has high weather resistance and tensile property, and is mixed with polyethylene to be stirred and physically crosslinked to obtain the modified polyethylene with acid and alkali resistance and high tensile property.
Further, when the modified polyethylene is prepared, if Pa is less than Pa0, the central control processor judges that the compatibility of the modified polyethylene does not meet the requirement, and selects the corresponding coupling agent addition amount according to the range of the modified polyethylene compatibility coefficient difference value of the actual compatibility coefficient difference value to add the coupling agent into the modified polyethylene mixed material to improve the physical crosslinking of the polyethylene and the modifying agent, so that the control precision of the modified polyethylene mixed material compatibility in the preparation process of the modified polyethylene is improved, the quality of the modified polyethylene is further improved, and the quality of the waterproof coiled material is further improved.
Further, when the modified polyethylene is prepared, if the coupling agent is added according to a certain amount, and the central control processor judges that Pa is less than Pa0, the central control processor selects the corresponding cosolvent quality according to the modified polyethylene compatibility difference value to add the cosolvent into the modified polyethylene mixed material, so that the physical crosslinking of the polyethylene and the modifier is improved, the control precision of the compatibility of the modified polyethylene mixed material in the preparation process of the modified polyethylene is improved, the quality of the modified polyethylene is further improved, and the quality of the waterproof coiled material is further improved.
Furthermore, the central control processor is provided with a plurality of modified asphalt mixture mass proportions, when the modified asphalt is prepared, different modified asphalt mixture mass proportions can be selected according to actual requirements, the flexibility and the precision of controlling each material quantity when the modified asphalt is prepared are improved, and the quality of the modified asphalt is further improved.
Furthermore, the actual compatibility coefficient of the modified asphalt is compared with the standard compatibility coefficient of the modified asphalt in the central control processor, the difference is calculated, and the corresponding mass proportion of the modified asphalt mixture is selected according to the difference to add the materials into the modified asphalt mixture, so that the control precision of the material quantity during the preparation of the modified asphalt is improved, and the quality of the modified asphalt is further improved.
Further, the maximum adding amount of the modified asphalt mixture in the central processor is used, when the modified asphalt is prepared, the central processor adds all the materials into the modified asphalt mixture according to the mass proportion of the modified asphalt mixture, and if the sum of the adding amounts of all the materials is larger than the maximum adding amount of the mixture, the mass proportion of the other modified asphalt mixture is changed to add all the materials into the modified asphalt mixture, so that the control precision of all the materials during the preparation of the modified asphalt is improved, and the quality of the modified asphalt is further improved.
Further, when the central processor controls the mass proportion of the modified asphalt mixture to be replaced, if the sum of the addition of the materials is greater than the maximum addition of the mixture, the central processor adjusts the stirring speed and the ultrasonic frequency of the high-speed shearing machine or increases the stirring time to enable the compatibility of the modified asphalt mixture to meet the requirement, so that the control precision of the preparation of the modified asphalt is improved, and the quality of the modified asphalt is further improved.
Further, the polyethylene and the modified asphalt which are modified by the coating machine are arranged on the modified polyethylene layer, the lower modified asphalt layer, the base layer, the upper modified asphalt layer and the upper modified polyethylene layer, and the modified polyethylene and asphalt have good acid and alkali resistance and tensile property, so that the quality of the waterproof coiled material is improved.
Drawings
FIG. 1 is a schematic structural view of a device for preparing the acid and alkali resistant elastomer modified asphalt waterproof coiled material;
FIG. 2 is a flow chart of a preparation method of the acid and alkali resistant elastomer modified asphalt waterproof coiled material;
FIG. 3 is a structural view of a cross section of the acid and alkali resistant elastomer modified asphalt waterproof roll.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a schematic structural diagram of an apparatus for manufacturing an acid-base resistant elastomer modified asphalt waterproof coiled material according to the present invention. The preparation method of the acid and alkali resistant elastomer modified asphalt waterproof coiled material is realized by the device, the acid and alkali resistant elastomer modified asphalt waterproof coiled material preparation device comprises a high-speed shearing machine 20, a screw extruder 30, a stock bin 10 and a central control processor 40, wherein the stock bin 10 comprises a first stock bin 101 and a second stock bin 102 and is used for containing and weighing raw materials required by preparing modified asphalt according to use requirements; the high-speed shearing machine 20 comprises a first motor 201, an ultrasonic vibrator 202, a temperature sensor 203, a spiral stirring paddle 204, an ultrasonic probe 205, a first feeding hole 206, a second feeding hole 207 and a first discharging hole 208, and is used for preparing modified asphalt; the screw extruder 30 comprises a second motor 301, a double-screw mechanism 302, a third feeding port 303, a fourth feeding port 304 and a second discharging port 305, and is used for melt-extruding the prepared modified asphalt; and the central control processor 40 is used for controlling the silo to weigh the raw materials according to the use requirement, receiving the data detected by the temperature sensor and the data detected by the ultrasonic probe in real time, and controlling the rotating speed of the stirring paddle, the heating temperature of the shearing machine and the vibration frequency of the ultrasonic vibrator according to the detected data, and controlling the temperature of the screw extruder and the rotating speed of the screw.
The central control processor 40 is electrically connected to the silo 10, the high-speed shearing machine 20 and the screw extruder 30, respectively, the first silo 101 is connected to the first feeding port 206 of the high-speed shearing machine 20, the second silo 102 is connected to the second feeding port 207 of the high-speed shearing machine 20, and the fourth feeding port 304 of the screw extruder 30 is connected to the second discharging port 210 of the high-speed shearing machine 20.
When modified asphalt or modified polyethylene is prepared, the central control processor 40 controls the first bin 101 to weigh asphalt or polyethylene and add the asphalt or polyethylene into the high-speed shearing machine 20, the high-speed shearing machine 20 is heated to completely melt the asphalt or polyethylene, when the asphalt or polyethylene is completely melted, the central control processor 40 controls the second bin 102 to weigh modifier, plasticizer and coupling agent and add the modifier, plasticizer and coupling agent into the high-speed shearing machine 20, the first motor 201 is started to drive the stirring paddle 205 to rotate to stir the mixed material, the central control processor 40 calculates the compatibility of the mixed material according to the ultrasonic probe, and when the compatibility reaches a value, the central control processor judges that the asphalt is modified, controls the modified asphalt to be conveyed into the screw extruder 30 through the first discharge port 208, and adds stabilizer through the third feed port 303, and controls the second motor to start 301 to rotate the screw 302 to mix the modified asphalt and the stabilizer and then melt and extrude the mixture.
Referring to fig. 2, which is a flowchart illustrating a method for manufacturing an acid and alkali resistant elastomer modified asphalt waterproof coiled material according to the present invention, an embodiment of the method for manufacturing an acid and alkali resistant elastomer modified asphalt waterproof coiled material includes:
step a, adding polyethylene into a high-speed shearing machine, heating and melting, adding a first modifier and a coupling agent into the melted polyethylene respectively, and stirring to obtain modified polyethylene;
b, adding asphalt into a high-speed shearing machine for heating and melting, adding a plasticizer, a coupling agent and a second modifier into the melted asphalt, mixing and stirring to obtain modified asphalt, conveying the modified asphalt to a screw extruder, adding a stabilizer, and melting and extruding;
c, conveying the modified polyethylene and the modified asphalt to a coating machine, and sequentially coating a lower isolation film layer, a lower modified asphalt layer, a base tire layer, an upper modified asphalt layer and an upper isolation film layer to obtain the acid and alkali resistant elastomer modified asphalt waterproof coiled material;
in the step a, a standard compatibility coefficient Pa0 of modified polyethylene is set in a central processor, when the modified polyethylene is prepared, the central processor detects the compatibility of the modified polyethylene in real time according to an ultrasonic probe and determines an actual compatibility coefficient Pa of the modified polyethylene, the central processor compares the actual compatibility coefficient Pa of the modified polyethylene with the standard compatibility coefficient of the modified polyethylene, if the Pa is larger than or equal to the Pa0, the central processor judges that the modified polyethylene is modified, if the Pa is smaller than the Pa0, the central processor judges that the modified polyethylene is not modified, when the central processor judges that the modified polyethylene is not modified, the central processor compares the actual compatibility coefficient Pa of the modified polyethylene with the standard compatibility coefficient Pa0 of the modified polyethylene and calculates a difference Pa, and selects a corresponding addition amount of a coupling agent according to the difference and compares the addition amount of the coupling agent with the modified polyethylene mixed material again, and if the Pa is smaller than the compatibility coefficient Pa, the central processor controls the modified polyethylene mixed material to add a cosolvent into the modified polyethylene mixed material.
Specifically, when the modified polyethylene is prepared, the standard compatibility coefficient of the modified polyethylene in the central processor is used, the compatibility coefficient of the modified polyethylene is detected and calculated in real time in the preparation and stirring process according to the ultrasonic probe, whether the modification of the polyethylene is completed or not is judged according to the compatibility coefficient, and if the modification is not completed, a certain amount of coupling agent and/or cosolvent is added, so that the crosslinking degree of the first modifying agent and the polyethylene in the preparation process is improved, the quality of the modified polyethylene is further improved, and the quality of the waterproof coiled material is further improved.
Specifically, the central processor is further provided with a modified asphalt standard compatibility coefficient Pb0 and a mixing material addition ratio Bb0, when the modified asphalt is prepared, the central processor monitors the compatibility of the modified asphalt in real time according to an ultrasonic probe and determines an actual modified asphalt compatibility coefficient value Pb, the central processor compares the actual modified asphalt compatibility coefficient value with the modified asphalt standard compatibility coefficient, if Pb is less than Pb0, the central processor judges that the asphalt is not modified, if Pb is more than or equal to Pb0, the central processor judges that the asphalt is modified, when the central processor judges that the modified asphalt is not modified, the central processor calculates a difference Pb between the actual modified asphalt compatibility coefficient value Pb and the modified asphalt compatibility coefficient Pb0, and selects the corresponding mixing material addition ratio according to the difference to adjust and increase the amount of each material until the modification is completed.
Specifically, when the modified asphalt is prepared, the standard compatibility coefficient of the modified asphalt in the central control processor is compared with the standard compatibility coefficient of the modified asphalt through actual measurement, if the compatibility of the comparison result does not meet the requirement, the central control processor adds materials into the modified asphalt mixture according to the selected addition proportion, and the compatibility of the modified asphalt mixture is controlled, so that the crosslinking degree of the first modifier and the asphalt is improved, the quality of the modified asphalt is further improved, and the quality of the waterproof coiled material is further improved.
Referring to fig. 2, in the method for manufacturing the acid and alkali resistant elastomer modified asphalt waterproof coiled material according to the embodiment of the present invention, in the step a, the first modifier is one of TPU resin and TPE resin, the cosolvent is one of sodium benzoate, sodium salicylate, and p-aminobenzoic acid,
in the step b, the second modifier is TPU resin and MPU resin according to the mass fraction of 3:1, mixing the mixed materials or the TPE resin and the MPU resin according to the mass fraction of 3:1, and the stabilizer is a rare earth stabilizer.
Specifically, when preparing modified polyethylene, TPU resin or TPE resin is selected as a second modifier, the TPU resin or TPE resin has high weather resistance and tensile property, and is mixed with polyethylene to be physically crosslinked in a stirring manner to obtain the modified polyethylene with acid and alkali resistance and high tensile property.
In this example, when preparing the modified polyethylene, the mass fractions of the materials are: 15-20 parts of polyethylene, 15-20 parts of a second modifier and 5-10 parts of a coupling agent, 2-8 parts of a cosolvent, preferably, the mass fraction ratio of each material is 1; when the modified asphalt is prepared, the mass fractions of the materials are as follows: 15-30 parts of 90# asphalt, 10-20 parts of second modifier, 5-8 parts of coupling agent, 3-8 parts of plasticizer, preferably 15 parts of 90# asphalt, 10 parts of second modifier, 5 parts of coupling agent, 3 parts of plasticizer, preferably 20 parts of 90# asphalt, 12 parts of second modifier, 6 parts of coupling agent, 4 parts of plasticizer, preferably 25 parts of 90# asphalt, 13 parts of second modifier, 6 parts of coupling agent and 5 parts of plasticizer, preferably, the mass fraction ratio of each material is as follows: 1:0.67:0.35:0.2.
Still further, the invention is also directed to a method for preparing the acid and alkali resistant elastomer-modified asphalt waterproof coil, the controller is further provided with a modified polyethylene compatibility coefficient difference and a coupling agent addition amount, the modified polyethylene compatibility coefficient difference includes a first polyethylene compatibility coefficient difference, a second polyethylene compatibility coefficient difference, a third polyethylene compatibility coefficient difference, a fourth polyethylene compatibility coefficient difference, an Δ Pa1, a Δ Pa2, a Δ Pa3, a coupling agent addition amount including a first coupling agent addition amount Qb1, a second coupling agent addition amount Qb2, a third coupling agent addition amount Qb3, a fourth coupling agent addition amount Qb4, a Qb1 addition amount Qb2, a Qb4 addition amount,
specifically, when Pa is less than Pa0, the central processor selects the corresponding coupling agent addition amount according to the actual compatibility coefficient difference Pa of the modified polyethylene, adds the coupling agent into the high-speed shearing machine,
when the Δ Pa1 is less than or equal to the Δ Pa2, the central processor selects the Δ Qb1 to add the coupling agent,
when the Δ Pa2 is less than or equal to the Δ Pa3, the central processor selects the Δ Qb2 to add the coupling agent,
when the Δ Pa3 is less than or equal to the Δ Pa4, the central processor selects the Δ Qb3 to add the coupling agent,
when Δ Pa is Δ Pa4, the central processor selects the Δ Qb4 to increase the coupling agent.
Specifically, when the modified polyethylene is prepared, if Pa is less than Pa0, the central processor judges that the compatibility of the modified polyethylene does not meet the requirement, and selects the corresponding coupling agent addition amount according to the range of the modified polyethylene compatibility coefficient difference of the actual compatibility coefficient difference to add the coupling agent into the modified polyethylene mixed material to improve the physical crosslinking of the polyethylene and the first modifying agent, so that the control precision of the modified polyethylene mixed material in the preparation process of the modified polyethylene is improved, the quality of the modified polyethylene is further improved, and the quality of the waterproof coiled material is further improved.
Please refer to fig. 2, in the step a, the central control processor is further provided with co-solvent masses, where the co-solvent masses include a first co-solvent mass Mz1, a second co-solvent mass Mz2, a third co-solvent mass Mz3, a fourth co-solvent mass Mz4, mz1 < Mz2 < Mz3 < Mz4,
specifically, when the middle control processor selects Qbi to add the coupling agent and finishes stirring, if Pa is less than Pa0, the middle control processor selects the corresponding cosolvent quality according to the actual compatibility coefficient difference of the modified polyethylene, Δ Pa, to add the cosolvent into the high-speed shearing machine,
when the Δ Pa1 is less than or equal to the Δ Pa2, the central control processor adds a cosolvent with the mass of Mz1 into the high-speed shearing machine,
when the Δ Pa2 is less than or equal to the Δ Pa3, the central control processor adds a cosolvent with the mass of Mz2 into the high-speed shearing machine,
when the Δ Pa3 is less than or equal to Pa4, the central processor adds a cosolvent with the mass of Mz3 into the high-speed shearing machine,
when the Δ Pa is equal to the Δ Pa4, the central processor adds Mz4 mass of cosolvent into the high-speed shearing machine.
Specifically, when the modified polyethylene is prepared, if the coupling agent is added according to a certain amount, and the central processor judges that Pa is less than Pa0, the central processor selects the corresponding cosolvent quality according to the modified polyethylene compatibility difference value to add the cosolvent into the modified polyethylene mixed material, so that the physical crosslinking of the polyethylene and the first modifier is improved, the control precision of the modified polyethylene mixed material compatibility in the preparation process of the modified polyethylene is improved, the quality of the modified polyethylene is further improved, and the quality of the waterproof coiled material is further improved.
Referring to fig. 2, in the embodiment of the invention, the acid and alkali resistant elastomer modified asphalt waterproof coiled material is prepared,
in the step b, a mixture mass ratio is set in the central processor, the mixture mass ratio includes a first mixture mass ratio Ba1, a second mixture mass ratio Ba2, a third mixture mass ratio Ba3, and a fourth mixture mass ratio Ba4, and the ith mixture mass ratio Bai is Ai: zi: qi: gi, setting i =1,2,3,4, where Ai is the asphalt mass, zi is the plasticizer mass, qi is the coupling agent mass, gi is the second modifier mass,
when preparing modified asphalt, the central control processor determines the quality of the plasticizer, the quality of the coupling agent and the quality of the second modifier according to the quality of the asphalt added into the high-speed shearing machine.
Specifically, the central control processor is provided with a plurality of modified asphalt mixture mass ratios, and when the modified asphalt is prepared, different modified asphalt mixture mass ratios can be selected according to actual requirements, so that the flexibility and the precision of controlling each material quantity when the modified asphalt is prepared are improved, and the quality of the modified asphalt is further improved.
Please continue to refer to fig. 2, in the method for preparing the acid and alkali resistant elastomer modified asphalt waterproof coiled material according to the embodiment of the present invention, the central processor is further provided with a mixture addition ratio and a modified asphalt compatibility coefficient difference, the mixture addition ratio includes a first mixture addition ratio Bb1, a second mixture addition ratio Bb2, a third mixture addition ratio Bb3, a fourth mixture addition ratio Bb4, and for the ith mixture addition ratio Bai, Δ Ai: Δ Zi: Δ Qi: Δ Ai is the addition amount of the asphalt, Δ Zi is the addition amount of the plasticizer, Δ Qi is the addition amount of the coupling agent, gi is the addition amount of the second modifier, the difference of the compatibility coefficients of the modified asphalt comprises a first modified asphalt compatibility coefficient Δ Pb1, a second modified asphalt compatibility coefficient difference Δ Pb2, a third modified asphalt compatibility coefficient difference Δ Pb3, a fourth modified asphalt compatibility coefficient difference Δ Pb2 less than Δ Pb4,
specifically, when Pb is less than Pb0, the central processor calculates the compatibility coefficient of the actual modified asphalt and compares the compatibility coefficient with the standard compatibility coefficient of the modified asphalt, the central processor selects the corresponding addition proportion of the mixed materials according to the compatibility coefficient of the modified asphalt, the central processor adds the materials to the high-speed shearing machine to adjust the compatibility of the modified asphalt,
if the Pb1 is less than or equal to Pb2, the central processor adds the Bb1 to the mixture,
when the Δ Pb2 is less than or equal to the Δ Pb3, the central processor selects the Bb2 to add each material into the mixed material,
if the Pb3 is less than or equal to Pb4, the central processor is to add the Bb3 to the mixture,
when the Δ Pb is more than Pb4, the central processor selects Bb4 to add the materials into the mixed material.
Specifically, the actual compatibility coefficient of the modified asphalt is compared with the standard compatibility coefficient of the modified asphalt in the central control processor, the difference is calculated, and the corresponding mass proportion of the modified asphalt mixture is selected according to the difference to add the materials into the modified asphalt mixture, so that the control precision of the material quantity during the preparation of the modified asphalt is improved, and the quality of the modified asphalt is further improved.
Please continue to refer to fig. 2, in the method for preparing the acid and alkali resistant elastomer modified asphalt waterproof coiled material according to the embodiment of the present invention, the central control unit further has a maximum addition amount Pb 'of the mixed material, when the central control processor adds each material to the mixed material according to the mixed material addition amount ratio Bbi, the central control processor calculates a sum of the addition amounts of each material, and if the sum of the addition amounts of each material is greater than the maximum addition amount Pb' of the mixed material, the central control processor controls to change the addition amount ratio of the mixed material.
Specifically, the maximum adding amount of the modified asphalt mixture in the central processor is used, when the modified asphalt is prepared, the central processor adds all the materials into the modified asphalt mixture according to the mass proportion of the modified asphalt mixture, and if the sum of the adding amounts of all the materials is larger than the maximum adding amount of the mixture, the mass proportion of the other modified asphalt mixture is changed to add all the materials into the modified asphalt mixture, so that the control precision of all the materials during the preparation of the modified asphalt is improved, and the quality of the modified asphalt is further improved.
Referring to fig. 2, in the method for preparing the acid-and-alkali-resistant elastomer modified asphalt according to the embodiment of the present invention, when the central processor controls the ratio of the replaced mixed materials, if the sum of the masses of the materials in each mixed material mass ratio is greater than the maximum addition amount of the mixed material, Δ Pb ″, the central processor controls and adjusts the stirring speed and the ultrasonic frequency of the high-speed shearing machine or adjusts and increases the stirring time.
Specifically, when the central processor controls the mass ratio of the modified asphalt mixture to be replaced, if the sum of the addition of the materials is greater than the maximum addition of the mixture, the central processor adjusts the stirring speed and the ultrasonic frequency of the high-speed shearing machine or increases the stirring time to enable the compatibility of the modified asphalt mixture to meet the requirement, so that the control precision of the preparation of the modified asphalt is improved, and the quality of the modified asphalt is further improved.
Please refer to fig. 3, which is a sectional structure diagram of the acid and alkali resistant elastomer modified asphalt waterproof coiled material of the present invention. The acid and alkali resistant elastomer modified asphalt waterproof coiled material provided by the embodiment of the invention comprises a lower isolation film layer, a lower modified asphalt layer, a base course layer, an upper modified asphalt layer and an upper isolation film layer, wherein the lower isolation film layer and the upper isolation film layer are made of modified polyethylene, and the base course layer is made of polyester fibers or glass fiber polyester felt.
Particularly, through the coating machine polyethylene and the modified asphalt that will modify the completion are according to modified polyethylene layer, lower modified asphalt layer, child basic unit, go up modified asphalt layer and last modified polyethylene layer, and modified polyethylene and asphalt have had fine acid and alkali resistance and tensile properties, have improved waterproofing membrane's quality.
As shown in fig. 3, in the acid and alkali resistant elastomer modified asphalt waterproof coiled material according to the embodiment of the present invention, the lower isolation film layer is 0.2mm to 1mm, the lower modified asphalt layer is 1mm to 2mm, the base course layer is 0.2mm to 0.9mm, the upper modified asphalt layer is 1mm to 2mm, and the upper isolation film layer is 0.2mm to 1mm.
Specifically, the upper and lower isolation film layers are 0.5mm, the upper and lower modified asphalt layers are 1.5mm, and the base course layer is 0.5mm.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is apparent to those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can be within the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A preparation method of an acid and alkali resistant elastomer modified asphalt waterproof coiled material is characterized by comprising the following steps:
step a, adding polyethylene into a high-speed shearing machine to be heated and melted, respectively adding a first modifier and a coupling agent into the melted polyethylene, and stirring to obtain modified polyethylene;
b, adding asphalt into a high-speed shearing machine for heating and melting, adding a plasticizer, a coupling agent and a second modifier into the melted asphalt, mixing and stirring to obtain a modified asphalt mixed material, conveying the modified asphalt to a screw extruder, adding a stabilizer, melting and extruding to obtain modified asphalt;
c, conveying the modified polyethylene and the modified asphalt to a coating machine, and sequentially coating a lower isolation film layer, a lower modified asphalt layer, a base tire layer, an upper modified asphalt layer and an upper isolation film layer to obtain the acid and alkali resistant elastomer modified asphalt waterproof coiled material;
in the step a, a standard compatibility coefficient Pa0 of modified polyethylene is set in a central processor, when the modified polyethylene is prepared, the central processor detects the compatibility of the modified polyethylene in real time according to an ultrasonic probe and determines an actual value Pa of the compatibility coefficient of the modified polyethylene, the central processor compares the actual value of the compatibility coefficient of the modified polyethylene with the standard compatibility coefficient of the modified polyethylene, if Pa is larger than or equal to Pa0, the central processor judges that the modified polyethylene is modified, if Pa is smaller than Pa0, the central processor judges that the modified polyethylene is not modified, when the central processor judges that the modified polyethylene is not modified, the central processor compares the actual value Pa of the compatibility coefficient of the modified polyethylene with the standard compatibility coefficient Pa0 of the modified polyethylene and calculates a difference Pa, the central processor selects a corresponding coupling agent according to the difference and adds the coupling agent to the modified polyethylene mixed material and compares the compatibility coefficient after the addition is detected again, and if Pa is smaller than Pa0, the central processor controls the addition of the coupling agent to add the cosolvent to the modified polyethylene mixed material;
the central processor is also provided with a standard modified asphalt compatibility coefficient Pb0 and an addition ratio Bb0 of each mixed material, when the modified asphalt is prepared, the central processor monitors the compatibility of the modified asphalt in real time according to an ultrasonic probe and determines an actual modified asphalt compatibility coefficient Pb, the central processor compares the actual modified asphalt compatibility coefficient with the standard modified asphalt compatibility coefficient, if Pb is less than Pb0, the central processor judges that the asphalt is not modified, if Pb is more than or equal to Pb0, the central processor judges that the asphalt is modified, when the central processor judges that the modified asphalt is not modified, the central processor calculates a difference Pb between the actual modified asphalt compatibility coefficient Pb and the modified asphalt compatibility coefficient Pb0, and selects the corresponding addition ratio of the mixed materials according to the difference to adjust and increase the amount of each material until the modification is finished;
in the step a, the first modifier is one of TPU resin and TPE resin, the cosolvent is one of sodium benzoate, sodium salicylate and p-aminobenzoic acid,
in the step b, the second modifier is TPU resin and MPU resin according to the mass fraction of 3:1, mixing the mixed materials or the TPE resin and the MPU resin according to the mass fraction of 3:1, the stabilizer is a rare earth stabilizer,
when the modified polyethylene is prepared, the mass fractions of the materials are as follows: 15-20 parts of polyethylene, 15-20 parts of second modifier, 5-10 parts of coupling agent and 2-8 parts of cosolvent;
in the step a, the central processor is further provided with a modified polyethylene compatibility coefficient difference and a coupling agent addition amount, the modified polyethylene compatibility coefficient difference includes a first modified polyethylene compatibility coefficient difference Pa1, a second modified polyethylene compatibility coefficient difference Pa2, a third modified polyethylene compatibility coefficient difference Pa3, a fourth modified polyethylene compatibility coefficient difference Δ Pa4, an Δ Pa1 less than an Δ Pa2 less than an Δ Pa3 less than an Δ Pa4, the coupling agent addition amounts include a first coupling agent addition amount Qb1, a second coupling agent addition amount Qb2, a third coupling agent addition amount Qb3, a fourth coupling agent addition amount Qb4, an Δ Qb1 less than an Δ Qb2 less than an Δ Qb3, a Qb3 less than an Δ Qb4,
when Pa is less than Pa0, the central processor selects the corresponding coupling agent adding amount according to the actual compatibility coefficient Δ Pa of the modified polyethylene to add the coupling agent into the high-speed shearing machine,
when the Δ Pa1 is less than or equal to the Δ Pa2, the central processor selects the Δ Qb1 to add the coupling agent,
when the Δ Pa2 is less than or equal to the Δ Pa3, the central processor selects the Δ Qb2 to add the coupling agent,
when the Δ Pa3 is less than or equal to the Δ Pa4, the central processor selects the Δ Qb3 to add the coupling agent,
the patient is at Pa4, the control processor is selected to be the patient is added with the coupling agent;
in the step a, the central processor is also provided with cosolvent masses, wherein the cosolvent masses comprise a first cosolvent mass Mz1, a second cosolvent mass Mz2, a third cosolvent mass Mz3, a fourth cosolvent mass Mz4, mz1 is more than Mz2 and more than Mz3 and more than Mz4,
when the Qbi and the coupling agent are added and stirred, if Pa is less than Pa0, the central processor selects the corresponding cosolvent by mass according to the actual compatibility coefficient difference Pa of the modified polyethylene,
when the Δ Pa1 is less than or equal to the Δ Pa2, the central control processor adds a cosolvent with the mass of Mz1 into the high-speed shearing machine,
when the Δ Pa2 is less than or equal to the Δ Pa3, the central control processor adds a cosolvent with the mass of Mz2 into the high-speed shearing machine,
when the Δ Pa3 is less than or equal to Pa4, the central processor adds a cosolvent with the mass of Mz3 into the high-speed shearing machine,
when the pressure is Pa4, the central processor adds Mz4 mass of cosolvent into the high-speed shearing machine;
in the step b, a mixture mass ratio is set in the central processor, the mixture mass ratio includes a first mixture mass ratio Ba1, a second mixture mass ratio Ba2, a third mixture mass ratio Ba3 and a fourth mixture mass ratio Ba4, and the i-th mixture mass ratio Bai is Ai: zi: qi: gi, setting i =1,2,3,4, where Ai is the asphalt mass, zi is the plasticizer mass, qi is the coupling agent mass, gi is the second modifier mass,
when the modified asphalt is prepared, the central control processor determines the quality of the plasticizer, the quality of the coupling agent and the quality of the second modifier according to the quality of the asphalt added into the high-speed shearing machine;
the central processor is also provided with a mixture addition ratio and a modified asphalt compatibility coefficient difference value, the mixture addition ratio comprises a first mixture addition ratio Bb1, a second mixture addition ratio Bb2, a third mixture addition ratio Bb3 and a fourth mixture addition ratio Bb4, and the ith mixture addition ratio Bai is an Δ Ai: Δ Zi: tan Qi: Δ Ai is the addition amount of the asphalt, Δ Zi is the addition amount of the plasticizer, Δ Qi is the addition amount of the coupling agent, gi is the addition amount of the second modifier, the difference of the compatibility coefficients of the modified asphalt comprises a first modified asphalt compatibility coefficient Δ Pb1, a second modified asphalt compatibility coefficient difference Δ Pb2, a third modified asphalt compatibility coefficient difference Δ Pb3, a fourth modified asphalt compatibility coefficient difference Δ Pb2 less than Δ Pb4,
when Pb is less than Pb0, the central processor calculates the compatibility coefficient of the actual modified asphalt and compares the compatibility coefficient of the actual modified asphalt with the standard compatibility coefficient of the modified asphalt, the central processor selects the corresponding addition proportion of the mixed materials according to the compatibility coefficient of the modified asphalt, the addition proportion of the mixed materials is selected to the high-speed shearing machine to adjust the compatibility of the modified asphalt,
when the Δ Pb1 is less than or equal to the Δ Pb2, the central processor selects the Bb1 to add each material into the mixed material,
when the Δ Pb2 is less than or equal to the Δ Pb3, the central processor selects the Bb2 to add each material into the mixed material,
when the Δ Pb3 is less than or equal to the Δ Pb4, the central processor selects the Bb3 to add each material into the mixed material,
when Pb is equal to Pb4, the central processor selects Bb4 to add each material into the mixed material;
the central control unit is also provided with a maximum addition amount Pb 'of mixed materials, when the central control processor adds each material to the mixed materials according to a mixed material addition amount ratio Bbi, the central control processor calculates the addition amount sum of each material, and if the addition amount sum of each material is greater than the maximum addition amount Pb' of the mixed materials, the central control processor controls the addition amount ratio of the mixed materials to be changed;
and when the central processor controls the proportion of the replaced mixed materials, if the sum of the mass of each material in each mass proportion of the mixed materials is greater than the maximum addition amount Pb' of the mixed materials, the central processor controls and adjusts the stirring speed and the ultrasonic frequency of the high-speed shearing machine or adjusts and increases the stirring time.
2. The preparation method of the acid and alkali resistant elastomer modified asphalt waterproof coiled material according to claim 1 is characterized in that when the modified polyethylene is prepared, the mass fraction ratio of each material is 1; when the modified asphalt is prepared, the mass fractions of the materials are as follows: 15-30 parts of 90# asphalt, 10-20 parts of second modifier, 5-8 parts of coupling agent and 3-8 parts of plasticizer.
3. The acid and alkali resistant elastomer modified asphalt waterproof coiled material prepared by the preparation method of claim 1 or 2, which is characterized by comprising a lower isolation film layer, a lower modified asphalt layer, a base course layer, an upper modified asphalt layer and an upper isolation film layer, wherein the lower isolation film layer and the upper isolation film layer are made of modified polyethylene, and the base course layer is made of polyester fiber or glass fiber polyester felt.
4. The acid and alkali resistant elastomer modified asphalt waterproofing membrane of claim 3, wherein the lower isolation film layer is 0.2mm to 1mm, the lower modified asphalt layer is 1mm to 2mm, the base layer is 0.2mm to 0.9mm, the upper modified asphalt layer is 1mm to 2mm, and the upper isolation film layer is 0.2mm to 1mm.
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