CN114395262A - Foaming modified asphalt waterproof coiled material and preparation method thereof - Google Patents
Foaming modified asphalt waterproof coiled material and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of building waterproofing, and particularly relates to a foaming modified asphalt waterproof coiled material and a preparation method thereof. The foamed modified asphalt waterproof coiled material comprises modified asphalt, wherein the modified asphalt has asphalt micro-bubbles, and the foaming ratio of the modified asphalt is (5-15) times; the modified asphalt meets the following indexes: the heat resistance is more than or equal to 120 ℃, the joint peeling strength is more than or equal to 1.5N/mm, and the low-temperature flexibility is-20 ℃ without cracks. The foamed modified asphalt prepared by the new process has good molding and manufacturing feasibility, storage and application feasibility, heat preservation and heat insulation performance, and good development prospect.
Description
Technical Field
The invention belongs to the technical field of building waterproofing, and particularly relates to a foaming modified asphalt waterproof coiled material and a preparation method thereof.
Background
In a waterproof system of a building, a structure layer, a waterproof layer, a heat insulation layer and other multi-layer structures are often included. The structures of all layers are mutually matched, so that the building has the overall effects of safety, water resistance and heat preservation. The waterproof layer comprises a modified asphalt waterproof layer, a polymer cement waterproof layer, a polyurethane waterproof layer, a cement mortar waterproof layer and the like. The insulating layer is mainly made of rigid materials such as extruded sheets, rock wool boards and the like.
The modified asphalt waterproof coiled material is widely accepted as a waterproof material which is widely used at home and abroad. The waterproof layer mainly plays a role in waterproofing, and is often used together with an insulating layer in a building system.
The existing modified asphalt coiled material comprises an elastomer modified asphalt waterproof coiled material bonded by heating and a cold-bonded self-adhesive modified asphalt waterproof coiled material. The modified asphalt does not have a waterproof function and is a dense layer with a certain thickness. At normal temperature or higher temperature, the asphalt has obvious viscosity.
The problems faced in the waterproof and thermal insulation application links include:
1) the insulating layer is made of prefabricated hard materials such as extruded polystyrene boards, polyurethane boards and the like. When the materials are used, the problem of gaps among plates is often faced, and the overall heat preservation and insulation effect of the heat preservation layer is influenced. In addition, in order to deal with local nodes, the heat-insulation board is often required to be cut into small blocks or special shapes, the action time and the cost are increased, and the matching degree of cutting cannot be guaranteed.
2) The modified asphalt is a temperature sensitive material, and the asphalt is easy to adhere under the condition of normal temperature or slightly high temperature. The modified asphalt is not suitable for foaming treatment, can not be extruded and foamed, and can be prefabricated into a waterproof coiled material with a heat insulation function.
The key technical problems that must be faced and solved in preparing foamed modified asphalt coiled materials include:
1) how to realize the extrusion foaming of the modified asphalt;
2) how to ensure that the foamed modified asphalt has higher strength, and the micro bubbles are not easy to damage in the production, transportation and use processes;
3) how to realize that the asphalt can not be adhered after the modified asphalt micro-bubbles are extruded;
4) in the construction process of the coiled materials, the bonding sealing compactness and the bonding firmness between the asphalt at the overlap edge are improved.
Disclosure of Invention
The invention aims to solve the problems and provides a foaming modified asphalt waterproof coiled material and a preparation method thereof, and the obtained foaming modified asphalt waterproof coiled material simultaneously meets the problems of no adhesion, deformation resistance, high strength, no deformation in a use link, easy lap joint and the like in the manufacturing process of the coiled material.
In order to achieve the above object, a first aspect of the present invention provides a foamed modified asphalt waterproofing membrane, which comprises modified asphalt;
the modified asphalt has asphalt micro-bubbles, and the foaming ratio of the modified asphalt is (5-15) times;
the modified asphalt meets the following indexes: the heat resistance is more than or equal to 120 ℃, the joint peeling strength is more than or equal to 1.5N/mm, and the low-temperature flexibility is-20 ℃ without cracks.
According to the invention, the raw material modified asphalt for obtaining the foaming modified asphalt waterproof coiled material does not need to be modified asphalt with a specific formula, and only needs to meet the indexes of heat resistance more than or equal to 120 ℃, joint peeling strength more than or equal to 1.5N/mm and low-temperature flexibility without crack at-20 ℃. In the prior art, various modified asphalts meeting the requirements can be found, and the aim of obtaining the foaming modified asphalt waterproof coiled material can be fulfilled.
According to the invention, the thermal conductivity coefficient of the foaming modified asphalt waterproof coiled material is less than or equal to 0.12W/m.K, and the pressure is (10-30) KPa.
Preferably, the aperture of the asphalt micro-bubble is (0.3-2) mm.
According to the invention, the foaming modified asphalt waterproof coiled material adopts a foaming agent to foam the modified asphalt; preferably, the blowing agent is at least one selected from butane, pentane, hexane and heptane. After foaming the modified asphalt with the blowing agent, the blowing agent is either absent from the finished product or present in a negligible amount.
Preferably, the modified asphalt comprises:
45-50 parts of matrix asphalt, 15-18 parts of SBS, 3-8 parts of IPP, 1-3 parts of viscosity reducer, 0.5-1.0 part of stabilizer and 20-40 parts of separant.
As described above, the modified asphalt having the above formulation is a preferred modified asphalt.
Preferably, the matrix asphalt is heavy traffic 70A asphalt and/or 90A asphalt, and is used as a matrix raw material to play a waterproof function.
As a preferred scheme, the SBS is a star-shaped SBS, the molecular weight of the SBS is 18-23 ten thousand, and the high-low temperature performance and the tensile strength of the asphalt can be effectively improved.
Preferably, the IPP is isotactic polypropylene, the molecular weight is 12-18 ten thousand, and the IPP is a plastomer modifier, so that the high-temperature performance of the asphalt can be effectively improved, and the viscosity among the asphalt is reduced.
Preferably, the viscosity reducer is an organic viscosity reducer.
Preferably, the stabilizer is a dicumyl peroxide compound or a mixture of the dicumyl peroxide compound and a cross-linking agent TAIC. The stabilizer is used for promoting the cross-linking reaction of SBS, so that star-shaped SBS is cross-linked into a net cross-linked structure.
Preferably, the release agent is talcum powder or a mixture of talcum powder and calcium stearate. The separant is used for isolating the modified asphalt, reduces the viscosity of the modified asphalt and prevents the adhesion of the foamed modified asphalt.
The preparation method of the modified asphalt comprises the following steps: the components are mixed evenly. Preferably, the preparation method of the modified asphalt comprises the following steps:
1) controlling the temperature of the system to be 100-120 ℃, and uniformly mixing the matrix asphalt with the viscosity reducer to obtain a first mixture;
2) controlling the temperature of the system to be 160-180 ℃, and uniformly mixing the first mixture with SBS and IPP until SBS is completely dissolved to obtain a second mixture;
3) and controlling the temperature of the system to be 160-170 ℃, uniformly mixing the second mixture and the stabilizing agent, adding the isolating agent after the reaction is completed, and uniformly mixing.
Preferably, at least one surface of the foamed modified asphalt waterproof roll further comprises an isolation layer. The barrier layer may be a barrier layer conventionally employed by those skilled in the art. For example, polyethylene films with the thickness of 0.01mm are respectively adhered to the upper part and the lower part of the container to be used as isolating layers.
The second aspect of the present invention provides a preparation method of the above-mentioned foamed modified asphalt waterproof roll, which comprises:
(1) mixing the modified asphalt with a foaming agent for prefoaming, and foaming after prefoaming is complete;
(2) extruding into the foaming modified asphalt waterproof coiled material with specific thickness and width.
Preferably, in step (1), the pre-foaming time is 1 to 2 hours.
Preferably, in the step (1), the temperature of the pre-foaming is 80-100 ℃.
Preferably, in the step (2), the extrusion temperature is 80-100 ℃.
The invention has the beneficial effects that:
the foamed modified asphalt prepared by the new process has good molding and manufacturing feasibility, storage and application feasibility, heat preservation and heat insulation performance, and good development prospect.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
FIG. 1 shows a photograph of a modified asphalt of example 1 of the present invention after foaming.
FIG. 2 shows a photograph of the modified asphalt of example 2 of the present invention after foaming.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In the embodiment of the invention, the viscosity reducer is 60-mesh vinyl bis stearamide provided by Lanzhou petrochemical;
in the embodiment of the invention, the stabilizer is a mixture of DCP (dicumyl peroxide compound) and TAIC (total fatty acid) provided by the New Ohwi Dongguan material Co., Ltd, and the mass ratio is 2.5: 1;
in the embodiment of the invention, the separant is a self-made separant, and is prepared from the following components in a mass ratio of 7: 3, 200 meshes of talcum powder and 800 meshes of calcium stearate.
Example 1
The embodiment provides a foaming modified asphalt waterproof coiled material and a preparation method thereof.
The preparation method of the foaming modified asphalt waterproof coiled material comprises the following steps:
(1) preparation of modified asphalt
1) Accurately weighing 45 parts by mass of 70A heavy traffic asphalt (refined in Qinhuang island), heating to 110 ℃, slowly adding 1.5 parts by mass of viscosity reducer, and uniformly mixing, wherein the next step is carried out after the mixture is observed to have no obvious particles;
2) slowly adding 15 parts by mass of SBS 4402 (Yanshan petrochemical) and uniformly stirring, and rapidly stirring, developing and grinding at 160-180 ℃ until the SBS 4402 is completely dissolved;
3) adding 7 parts by mass of IPP (Dioscorea opposita petrochemical) at the temperature, and continuously stirring until the IPP is completely dissolved;
4) controlling the temperature to be 160-170 ℃, slowly adding 0.5 part by mass of a stabilizer and quickly stirring to avoid the agglomeration of SBS, and continuously and quickly stirring for 1.5 hours after the stabilizer is completely added until the reaction is complete and the mixture is uniform;
5) slowly adding 31 parts by mass of a separant after the reaction is completed, and quickly stirring to completely mix the separant;
6) and stabilizing the temperature at 140-160 ℃, and slowly stirring for later use.
The technical indices of the modified asphalt obtained are shown in the following table:
TABLE 1
Experimental tests show that the performance of the modified asphalt prepared by the method meets the preset requirements of technical indexes in Table 1.
(2) Preparation of foamed modified asphalt waterproof coiled material
1) Putting the prepared modified asphalt into a pre-foaming tank, adding a foaming agent (pentane) for pre-foaming, wherein the temperature is 140 ℃, and the time is 1.5 hours;
2) foaming is carried out after complete pre-foaming, the foaming multiplying power of the modified asphalt is 8 times, the picture after foaming is shown in figure 1, and then the modified asphalt is extruded into coiled materials with the thickness of 4.5mm and the width of 1m at 90 ℃ according to requirements;
3) when the coiled material is extruded, the upper part and the lower part of the coiled material are respectively adhered with polyethylene films with the thickness of 0.01mm as isolation materials;
4) the pore diameter of the asphalt microbubbles of the obtained foaming modified asphalt waterproof coiled material is 1.5mm, and the thermal conductivity coefficient of the foaming modified asphalt waterproof coiled material is 0.08W/m.K.
Test example 1: example 1 verification of the adhesion resistance test of modified asphalt coil
1) Curl adhesion verification
The thickness d of the coil prepared above was measured0。
And winding the modified asphalt coiled material into a coiled material with the inner diameter of 10cm, wherein the winding speed is 200 m/min.
And (3) vertically standing the coiled material in an environment of 25-45 ℃, testing the thickness of the coiled material at the position of 1m of the coiled material core at intervals, and observing whether the modified asphalt microbubbles in the coiled material are adhered or not. The test results are shown in the following table:
TABLE 2
| Standing time/d | Thickness/mm of test piece | Modified asphalt with or without adhesion |
| 0 | 4.53 | Whether or not |
| 7 | 4.44 | Whether or not |
| 30 | 4.45 | Whether or not |
| 90 | 4.39 | Whether or not |
| 180 | 4.40 | Bonding at the edge pressure |
Tests show that in a short period of time, the thickness of the coiled material is not obviously changed after the coiled material is coiled, and the micro-bubble asphalt is not bonded. After 180 days, no asphalt micro bubbles are adhered in the large-area of the coiled material, and a little adhesion is generated after local compression.
2) Pressure-bearing adhesion verification
And (3) continuously verifying whether the asphalt micro-bubbles are broken or bonded through a pressure bearing experiment, and carrying out the following experiment:
first, the thickness d of the coil is measured0The coiled material is placed in an environment simulation box, the temperature is 30-35 ℃, and the temperature relative humidity is 10% -95%.
And horizontally placing a heavy object above the test piece to form the pressure of 10KPa, 20KPa, 30KPa and 50KPa between the heavy object and the modified asphalt coiled material, standing for 3d, taking down the heavy object, testing the thickness of the test piece, and observing whether the asphalt micro bubbles are bonded.
TABLE 3
| pressure/KPa | Thickness/mm of test piece | Modified asphalt with or without adhesion |
| 0 | 4.50 | Without apparent adhesion |
| 10 | 4.46 | Without apparent adhesion |
| 20 | 4.44 | Without apparent adhesion |
| 30 | 4.40 | Without apparent adhesion |
| 40 | 4.12 | Partial bonding |
| 50 | 4.04 | Has more obvious fracture |
Experiments show that under the pressure condition of 30KPa, the coiled material can keep good thickness stability, the thickness change rate is 2.2 percent, and asphalt micro bubbles are not adhered.
3) Modified asphalt coiled material overlap edge application construction adhesion test
And respectively lapping the short sides and the long sides of the coiled material, wherein the lapping process is carried out by adopting a hot melting heating method. To prevent the micro-bubbles from being broken by heat or from being unevenly bonded by heat, the heating zone and temperature should be strictly controlled. The test was carried out by a torch and a hot air welding torch, respectively, and the asphalt adhesiveness in the overlap area and the damage of the non-overlap edge asphalt microbubbles were observed.
TABLE 4
As shown in the table above, the heating area using the torch is not easy to control, and the asphalt microbubbles in the non-overlapping area are easily damaged. In the heating process by adopting the hot air welding gun, if the heating temperature is too low, the overlap edge asphalt is not easy to form viscosity, is not easy to bond, is easy to form cold joint, is heated to more than 140 ℃, and is easy to form good overlap bonding and asphalt microbubble protection in non-overlap areas.
4) Application test of heat insulating property of modified asphalt coiled material
The PE film self-adhesive isolated asphalt coiled material with the same thickness was subjected to the simulation test in the same manner as the coiled material in example 1, and both of them were completely adhered to the same test box, and the box size length × width × height was: 1 m.times.1 m. Selecting a middle point in the box body as a temperature test point, wherein the test result is as follows:
TABLE 5
As can be known from comparison tests, the heat insulation coiled material in the embodiment 1 can play a good role in heat insulation and preservation, the test high temperature is lower than that of the comparison coiled material, the test low temperature is higher than that of the comparison coiled material, and the test interval is more similar to the average temperature.
Example 2
The embodiment provides a foaming modified asphalt waterproof coiled material and a preparation method thereof.
The preparation method of the foaming modified asphalt waterproof coiled material comprises the following steps:
(1) preparation of modified asphalt
Accurately weighing 50 parts by mass of 70A heavy traffic asphalt, heating to 110 ℃, slowly adding 2.5 parts by mass of viscosity reducer, and uniformly mixing, wherein the next step is carried out after the mixture is observed to have no obvious particles;
1) slowly adding 18 parts by mass of SBS 4402, uniformly stirring, and rapidly stirring, developing and grinding at 160-180 ℃ until the SBS 4402 is completely dissolved;
2) adding 5 parts by mass of IPP at the temperature, and continuously stirring until the IPP is completely dissolved;
3) cooling to 160-170 ℃, slowly adding 1.0 part by mass of stabilizer and rapidly stirring to avoid the agglomeration of SBS, and continuously and rapidly stirring for 1.5h after complete addition until complete reaction and uniform mixing;
4) after the reaction was completed, 23.5 parts by mass of a release agent was slowly added and rapidly stirred to be completely mixed.
And stabilizing the temperature at 140-160 ℃, and slowly stirring for later use.
The technical indices of the modified asphalt obtained are shown in the following table:
TABLE 6
Experimental tests show that the performance of the modified asphalt prepared by the method meets the preset requirements of technical indexes in Table 6.
(2) Preparation of foamed modified asphalt waterproof coiled material
1) Putting the prepared modified asphalt into a pre-foaming tank, adding a foaming agent (pentane) for pre-foaming, wherein the temperature is 140 ℃, and the time is 1.5 hours;
2) foaming is carried out after complete pre-foaming, the foaming multiplying power of the modified asphalt is 6 times, a picture after foaming is shown in figure 2, and then the modified asphalt is extruded into a coiled material with the thickness of 5.0mm and the width of 1m at 90 ℃ according to requirements;
3) when the coiled material is extruded, the upper part and the lower part of the coiled material are respectively adhered with polyethylene films with the thickness of 0.01mm as isolation materials;
4) the pore diameter of the asphalt microbubbles of the obtained foaming modified asphalt waterproof coiled material is 1.2mm, and the thermal conductivity coefficient of the foaming modified asphalt waterproof coiled material is 0.10W/m.K.
Test example 2: example 2 verification of the adhesion resistance test of the modified asphalt coil
1) Curl adhesion verification
The thickness d of the coil prepared above was measured0。
And winding the modified asphalt coiled material into a coiled material with the inner diameter of 10cm, wherein the winding speed is 200 m/min.
And (3) vertically standing the coiled material in an environment of 25-45 ℃, testing the thickness of the coiled material at the position of 1m of the coiled material core at intervals, and observing whether the modified asphalt microbubbles in the coiled material are adhered or not. The test results are shown in the following table:
TABLE 7
Tests show that the thickness of the coiled material is not obviously changed after the coiled material is coiled and the micro-foam asphalt is not bonded in the conventional storage time.
2) Pressure-bearing adhesion verification
And (3) continuously verifying whether the asphalt micro-bubbles are broken or bonded through a pressure bearing experiment, and carrying out the following experiment:
first, the thickness d of the coil is measured0The coiled material is placed in an environment simulation box, the temperature is 30-35 ℃, and the temperature relative humidity is 10% -95%.
And horizontally placing a heavy object above the test piece to form the pressure of 10KPa, 20KPa, 30KPa and 50KPa between the heavy object and the modified asphalt coiled material, standing for 3d, taking down the heavy object, testing the thickness of the test piece, and observing whether the asphalt micro bubbles are bonded.
TABLE 8
| pressure/KPa | Thickness/mm of test piece | Modified asphalt with or without adhesion |
| 0 | 5.03 | Without apparent adhesion |
| 10 | 4.96 | Without apparent adhesion |
| 20 | 4.94 | Without apparent adhesion |
| 30 | 4.84 | There was little adhesion |
| 50 | 4.73 | Has more obvious fracture |
Through experiments, the coiled material can keep good thickness stability under the pressure condition of 20KPa, and the asphalt micro-bubbles are not adhered.
3) Modified asphalt coiled material overlap edge application construction adhesion test
And respectively lapping the short sides and the long sides of the coiled material, wherein the lapping process is carried out by adopting a hot melting heating method. To prevent the micro-bubbles from being broken by heat or from being unevenly bonded by heat, the heating zone and temperature should be strictly controlled. The test was carried out by a torch and a hot air welding torch, respectively, and the asphalt adhesiveness in the overlap area and the damage of the non-overlap edge asphalt microbubbles were observed.
TABLE 9
As shown in the table above, the heating area using the torch is not easy to control, and the asphalt microbubbles in the non-overlapping area are easily damaged. In the heating process by adopting the hot air welding gun, if the heating temperature is too low, the overlap edge asphalt is not easy to form viscosity, is not easy to bond, is easy to form cold joint, is heated to more than 140 ℃, and is easy to form good overlap bonding and asphalt microbubble protection in non-overlap areas.
4) Application test of heat insulating property of modified asphalt coiled material
The PE film self-adhesive isolated asphalt coiled material with the same thickness and the coiled material in example 2 were subjected to the simulation test in the same manner, and both of them were completely adhered to the same test box, and the box size length × width × height was: 1 m.times.1 m. Selecting a middle point in the box body as a temperature test point, wherein the test result is as follows:
watch 10
As can be seen from comparison tests, the heat insulation coiled material in the embodiment 2 can have good heat insulation performance, the test high temperature is lower than that of the comparison coiled material, the test low temperature is higher than that of the comparison coiled material, and the test interval is more similar to the average temperature.
Comparative example 1
To compare the effect of the contents of the components in the formulation on the properties of the foamed bitumen coil, the following changes were made on the basis of example 2: the addition amount of SBS 4402 was adjusted from 18 parts by mass to 10 parts by mass, and the mass of the release agent was increased from 23.5 parts by mass to 31.5 parts by mass, while the other components were unchanged.
Comparative example 2
To compare the effect of the contents of the components in the formulation on the properties of the foamed bitumen coil, the following changes were made on the basis of example 2: the amount of IPP added was adjusted from 5 parts by mass to 10 parts by mass, and the amount of the release agent was reduced from 23.5 parts by mass to 18.5 parts by mass, while the other components were unchanged.
The experiments of comparative example 1 and comparative example 2 after the component change are tested, the basic performances of the modified asphalt are as follows:
TABLE 11
| Item | Example 2 | Comparative example 1 | Comparative example 2 |
| Softening point/. degree.C | 128 | 115 | 130 |
| Penetration/0.1 mm at 25 ℃ | 13 | 25 | 9 |
| Ductility per cm at 10 DEG C | 45 | 38 | 28 |
| Low temperature flexibility/. degree.C | -24 | -18 | -18 |
| Tensile strength/MPa | 8.3 | 4.8 | 9.3 |
Experimental tests show that the modified asphalt in the comparative example 1 has obviously reduced high-temperature and low-temperature flexibility resistance and reduced comprehensive performance. In comparative example 2, the high temperature resistance was slightly enhanced, but the material hardness was increased and the elongation was decreased.
1) Curl adhesion verification
The test results are shown in the following table:
TABLE 12
The thickness change after storage shows that the thickness change of the comparative example 1 is obvious, and the asphalt micro-bubbles have the adhesion phenomenon. Comparative example 2 has better thickness retention and better asphalt microbubble stability.
2) Pressure-bearing adhesion verification
And (3) continuously verifying whether the asphalt micro-bubbles are broken or bonded through a pressure bearing experiment, and carrying out the following experiment:
first, the thickness d of the coil is measured0The coiled material is placed in an environment simulation box, the temperature is 30-35 ℃, and the temperature relative humidity is 10% -95%.
And horizontally placing a heavy object above the test piece to form the pressure of 10KPa, 20KPa, 30KPa and 50KPa between the heavy object and the modified asphalt coiled material, standing for 3d, taking down the heavy object, testing the thickness of the test piece, and observing whether the asphalt micro bubbles are bonded.
Watch 13
It can be seen through experiments that comparative example 1 has a large thickness change at a pressure of 10KPa, and the asphalt micro bubbles are crushed or adhered. The thickness retention of the comparative example 2 is better, and the stability of the asphalt micro-bubbles can be also maintained under higher pressure.
3) Modified asphalt coiled material overlap edge application construction adhesion test
And respectively lapping the short sides and the long sides of the coiled material, wherein the lapping process is carried out by adopting a hot melting heating method. The hot air welding gun is adopted to respectively carry out overlap welding research on the three groups of experiments, and the experimental results are as follows:
TABLE 14
As shown in the table above, in comparative example 1, the asphalt microbubbles were easily broken at higher temperatures and the coil protection during the construction was poor. In comparative example 2, the addition of the plastomer in an excessive amount affects the adhesiveness between the modified asphalts, and although the heating by hot melting is carried out, the overlap edges are liable to be not completely bonded and sealed.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A foaming modified asphalt waterproof coiled material is characterized by comprising modified asphalt;
the modified asphalt has asphalt micro-bubbles, and the foaming ratio of the modified asphalt is (5-15) times;
the modified asphalt meets the following indexes: the heat resistance is more than or equal to 120 ℃, the joint peeling strength is more than or equal to 1.5N/mm, and the low-temperature flexibility is-20 ℃ without cracks.
2. The roll of foam-modified asphalt waterproofing material according to claim 1,
the aperture of the asphalt micro-bubble is (0.3-2) mm;
the heat conductivity coefficient of the foamed modified asphalt waterproof coiled material is less than or equal to 0.12W/m.K, and the pressure is (10-30) KPa.
3. The roll of foam-modified asphalt waterproofing material according to claim 1,
the foaming modified asphalt waterproof coiled material adopts a foaming agent to foam modified asphalt;
the blowing agent is preferably at least one selected from butane, pentane, hexane and heptane.
4. The roll of foamed modified asphalt waterproofing material according to claim 1, wherein the modified asphalt comprises:
45-50 parts of matrix asphalt, 15-18 parts of SBS, 3-8 parts of IPP, 1-3 parts of viscosity reducer, 0.5-1.0 part of stabilizer and 20-40 parts of separant.
5. The roll of foam-modified asphalt waterproofing material according to claim 4,
the matrix asphalt is heavy traffic 70A asphalt and/or 90A asphalt;
the SBS is star-shaped SBS, and the molecular weight of the SBS is 18-23 ten thousand;
the IPP is isotactic polypropylene and has the molecular weight of 12-18 ten thousand.
6. The roll of foam-modified asphalt waterproofing material according to claim 4,
the viscosity reducer is an organic viscosity reducer;
the stabilizer is a dicumyl peroxide compound or a mixture of the dicumyl peroxide compound and a cross-linking agent TAIC;
the separant is talcum powder or a mixture of talcum powder and calcium stearate.
7. The foamed modified asphalt waterproofing membrane according to claim 4, wherein the preparation method of the modified asphalt comprises: mixing the components uniformly;
preferably:
1) controlling the temperature of the system to be 100-120 ℃, and uniformly mixing the matrix asphalt with the viscosity reducer to obtain a first mixture;
2) controlling the temperature of the system to be 160-180 ℃, and uniformly mixing the first mixture with SBS and IPP until SBS is completely dissolved to obtain a second mixture;
3) and controlling the temperature of the system to be 160-170 ℃, uniformly mixing the second mixture and the stabilizing agent, adding the isolating agent after the reaction is completed, and uniformly mixing.
8. The roll of foam-modified asphalt waterproofing material according to claim 1, wherein at least one surface of the roll of foam-modified asphalt waterproofing material further comprises a barrier layer.
9. The method for preparing the foaming modified asphalt waterproof coiled material as claimed in any one of claims 1 to 8, characterized in that the preparation method comprises the following steps:
(1) mixing the modified asphalt with a foaming agent for prefoaming, and foaming after prefoaming is complete;
(2) extruding into the foaming modified asphalt waterproof coiled material with specific thickness and width.
10. The roll of foam-modified asphalt waterproofing material according to claim 9,
in the step (1), the pre-foaming temperature is 80-100 ℃;
in the step (2), the extrusion temperature is 80-100 ℃.
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| CN113186772A (en) * | 2021-03-08 | 2021-07-30 | 武汉理工大学 | Light heat-insulating semi-flexible anti-crack pavement and preparation method thereof |
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