CN115260776A - Modified asphalt, preparation method and application thereof, and pre-paved modified asphalt waterproof coiled material - Google Patents

Modified asphalt, preparation method and application thereof, and pre-paved modified asphalt waterproof coiled material Download PDF

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CN115260776A
CN115260776A CN202210773657.6A CN202210773657A CN115260776A CN 115260776 A CN115260776 A CN 115260776A CN 202210773657 A CN202210773657 A CN 202210773657A CN 115260776 A CN115260776 A CN 115260776A
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modified asphalt
parts
paved
mineral particles
asphalt
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CN115260776B (en
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苏长泳
吴士玮
刘金景
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Beijing Oriental Yuhong Waterproof Technology Co Ltd
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Beijing Oriental Yuhong Waterproof Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B11/00—Layered products comprising a layer of bituminous or tarry substances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B11/00—Layered products comprising a layer of bituminous or tarry substances
    • B32B11/12—Layered products comprising a layer of bituminous or tarry substances next to a particulate layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E04B1/665—Sheets or foils impervious to water and water vapor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/10—Roof covering by making use of flexible material, e.g. supplied in roll form by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles

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Abstract

The invention belongs to the technical field of coiled materials, and particularly relates to modified asphalt, a preparation method and application thereof, and a pre-paved modified asphalt waterproof coiled material. The modified asphalt uses a modifier comprising at least one of a thermoplastic phenolic resin and an epoxy type thermoplastic elastomer; the high-viscosity pre-paved modified asphalt waterproof coiled material is prepared from modified asphalt and/or porous mineral particles attached to the surface of the modified asphalt. Compared with the prior art, the waterproof coiled material prepared by the modified asphalt has better water channeling resistance and stripping resistance.

Description

Modified asphalt, preparation method and application thereof, and pre-paved modified asphalt waterproof coiled material
Technical Field
The invention belongs to the technical field of coiled materials, and particularly relates to modified asphalt, a preparation method and application thereof, and a high-viscosity pre-paved modified asphalt waterproof coiled material.
Background
The pre-paving and anti-sticking technology is a construction method that waterproof coiled materials are laid on a base surface in a vacant way, and then structural concrete is poured to enable concrete slurry to be tightly combined with a coiled material adhesive film layer. The method has the characteristics of convenient construction, no need of applying a protective layer and the like, and is mainly used for basement bottom plate construction. The upper surface of waterproofing membrane structure, promptly with post-cast concrete bonding surface be inorganic mineral material, this material can act as the antiseized layer in coiled material surface, the personnel convenience of standing when avoiding the construction operation can improve coiled material and post-cast concrete bonding strength again. In the prior art, many studies have been made on pre-paved waterproof rolls, for example, chinese patent application CN111040652A discloses a polymer pre-paved waterproof roll, which comprises a polymer substrate layer, a pressure-sensitive adhesive layer on the polymer substrate layer and a sand anti-sticking layer on the pressure-sensitive adhesive layer; the pressure-sensitive adhesive layer includes: 25-35 parts by mass of a styrene-isoprene-styrene block copolymer; 32-38 parts of carbon five petroleum resin; 5-12 parts of 145 pentaerythritol modified rosin resin; 25-32 parts of naphthenic oil; 0.3 part by mass of an antioxidant; 0.5 part by mass of an ultraviolet light stabilizer; the softening point of the C-V petroleum resin is 95-105 ℃, the color is less than No. 4, and the kinematic viscosity of the naphthenic oil is 9-11mm at 100 DEG C2The density is 0.8950-0.9100g/cm at 20 deg.C3. The adhesive effect of the pressure-sensitive adhesive layer using the composition with sintered sand. For example, chinese patent application CN110938390A discloses a pre-paved high polymer waterproof roll, which comprises a flaky high polymer carrier and a hot melt pressure sensitive adhesive on the flaky high polymer carrierThe anti-sticking particles are arranged on the hot-melt pressure-sensitive adhesive layer, the particle size of the anti-sticking particles is smaller than the thickness of the hot-melt pressure-sensitive adhesive layer, the surfaces of the anti-sticking particles are wrapped with the organic layer, and the anti-sticking particles are connected with the hot-melt pressure-sensitive adhesive layer through the organic layer; the organic layer comprises the following components: 100-160 parts by mass of a solvent; 50-80 parts by mass of polyurethane resin; 15-20 parts by mass of a pigment; 10-12 parts by mass of a filler; 0.3-1 part by mass of a crosslinking agent; 0.5-1 part by mass of an antioxidant; 1-2.5 parts of an anti-ultraviolet agent; 0.03 to 0.2 mass portion of thickening agent.
However, the current coiled materials face a common problem that mineral particles on the surface of the coiled materials are not firmly bonded with the modified asphalt and fall off when not constructed; after construction, the mineral particles are bonded with concrete, separated from the modified asphalt, and constructed by adopting a pre-paving method, so that the requirement on the bonding property of the waterproof coiled material and post-cast concrete is higher. In GB/T23457-2017 'pre-paved waterproof roll', besides the requirement on the peeling strength of the roll and post-poured concrete, the waterproof roll also needs to meet the requirement on water channeling resistance so as to prevent the situation that underground water leaks through the gap between the roll and the post-poured concrete in floor engineering. In the actual use process, the waterproof roll material with the surface coated with the mineral particles, including the modified asphalt waterproof roll material, is not firmly bonded with the post-cast concrete, the mineral particles and the concrete form a whole and are separated from adhesive layers such as modified asphalt, a water channeling channel is formed, and the safety risk is increased.
Disclosure of Invention
In order to overcome the technical problems, the invention provides modified asphalt, a preparation method and application thereof and a high-viscosity pre-laid modified asphalt waterproof coiled material.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
a modified asphalt uses a modifier comprising at least one of a thermoplastic phenolic resin and an epoxy-type thermoplastic elastomer.
Preferably, the structural formula of the thermoplastic phenolic resin is:
Figure BDA0003725518070000021
the thermoplastic plastic phenolic resin contains a plurality of hydroxyl groups, most mineral particles contain compounds consisting of Si, al, O and H, and contain a large amount of O elements, so that the introduction of the hydroxyl groups can form hydrogen bonds with O, and the adhesive force between the modified asphalt and the porous mineral is improved.
Preferably, the epoxy thermoplastic elastomer is an ESBC6500, and the epoxy thermoplastic elastomer is a novel thermoplastic elastomer containing a strong polar functional group obtained by epoxidizing a styrene thermoplastic elastomer (SBC), and compared with a common SBC, the chemical changes are as follows:
Figure BDA0003725518070000022
the thermoplastic elastomer contains epoxy polar groups, and can enhance the polarity of the modified asphalt. The mineral particles are mostly SiO2、Al2O3The adhesion of the mineral particles on the surface of the modified asphalt can be improved by improving the polarity of the compounds with different conformations.
Preferably, the amount of the modifier is 12-15% of the total mass of the modified asphalt.
In some preferred technical solutions, the modified asphalt further comprises: matrix asphalt, softening oil, SBR, tackifying resin, a stabilizer and inorganic filler.
Preferably, the stabilizer is a peroxy-based crosslinking agent.
Preferably, the inorganic filler is silicate having a particle size of 200 to 400 mesh.
In some preferred technical schemes, the modified asphalt comprises the following raw materials in parts by weight: 40-45 parts of matrix asphalt, 10-15 parts of softening oil, 8-12 parts of epoxy thermoplastic elastomer, 5-10 parts of SBR, 3-5 parts of thermoplastic phenolic resin, 4-8 parts of tackifying resin, 0.5-1.0 part of stabilizer and 5-35 parts of inorganic filler.
The invention also provides a preparation method of the modified asphalt, which comprises the following steps:
(1) Mixing and melting the matrix asphalt and the softening oil, adding SBR and the epoxy thermoplastic elastomer, heating and uniformly stirring, and dissolving to obtain a mixed solution A;
(2) Heating the mixed solution A obtained in the step (1), adding thermoplastic phenolic resin, continuously stirring, and dissolving to obtain a mixed solution B;
(3) Cooling the mixed solution B obtained in the step (2), adding a stabilizer, continuously stirring, adding tackifying resin after dissolving, and continuously stirring to obtain a mixed solution C;
(4) And (4) adding an inorganic filler into the mixed liquid C obtained in the step (3), and stirring and mixing uniformly to obtain the modified asphalt.
Preferably, in the step (1), the heating temperature of the melting is 120-160 ℃; the temperature is increased to 160-180 ℃.
Preferably, the temperature rise in the step (2) is to 180-190 ℃.
Preferably, the temperature reduction in the step (3) is carried out to 160-170 ℃.
The invention also provides application of the modified asphalt in a waterproof roll.
The invention also provides a high-viscosity pre-paved modified asphalt waterproof coiled material, and specifically, the high-viscosity pre-paved modified asphalt waterproof coiled material contains the modified asphalt.
Preferably, the upper surface of the modified asphalt is covered with porous mineral particles.
Further preferably, the porous mineral particles are at least one of diatomaceous earth, mullite and expanded perlite.
Further preferably, the porous mineral particles have a particle size of 8 to 16 mesh and a porosity of 40 to 60%.
The invention also provides a method for preparing the high-viscosity pre-paved modified asphalt waterproof coiled material.
Specifically, the preparation method comprises the following steps:
s1, forming a modified asphalt layer on a reinforcing layer by using the modified asphalt;
s2, covering porous mineral particles on the upper surface of the modified asphalt layer obtained in the step S1 to obtain a mineral particle layer;
and S3, applying pressure on the surface of the mineral particle layer obtained in the step S2 to enable the porous mineral particles and the modified asphalt to be mutually embedded, and thus obtaining the high-viscosity pre-paved modified asphalt waterproof coiled material.
Preferably, the thickness of the modified asphalt layer in the step S1 is more than or equal to 1.2mm.
Preferably, the covering conditions of the porous mineral particles in step S2 are: the modified asphalt has a temperature of 80-150 deg.C and a porous mineral particle spreading amount of 1.2-1.6kg/m2。
Preferably, the conditions for applying the pressure to the surface in step S3 are: the temperature of the modified asphalt is 60-120 ℃, and the surface applied pressure is 3-5MPa.
The beneficial effects of the invention are as follows:
(1) Compared with the prior art, the waterproof coiled material prepared by using the modified asphalt has better scurring water resistance and stripping resistance.
(2) On one hand, the high-viscosity pre-paved modified asphalt waterproof coiled material prepared by the modified asphalt adopts surface porous mineral particles as a facing material, so that the internal surface area of the mineral particles is increased, and the modified asphalt adhesive is embedded into holes of the mineral particles to form physical anchoring; on the other hand, the adhesiveness between the asphalt and the mineral particles is improved by improving the asphalt, namely, the polarity of the rubber material is enhanced by introducing an epoxy thermoplastic elastomer modifier with higher polarity into the modified asphalt, and the thermoplastic phenolic resin is added into the modified asphalt to provide more hydroxyl groups, so that the acting force of silicon-oxygen bonds in the modified asphalt and the mineral particles is increased, and the acting force of hydrogen bonds is formed, so that the asphalt and the mineral particles have higher adhesiveness, and the occurrence of water channeling can be effectively reduced.
(3) The preparation method is simple, convenient to construct and suitable for industrial popularization.
Detailed Description
The following embodiments of the present invention are provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Before the present embodiments are further described, it is to be understood that the scope of the invention is not to be limited to the specific embodiments described below; it is also to be understood that the terminology used in the examples herein is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention.
When numerical ranges are given in the examples, it is understood that both endpoints of each of the numerical ranges and any value therebetween can be selected unless the invention otherwise indicated. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The sources of the raw materials used in the present invention are not limited, and the raw materials used in the present invention are all those commonly available in the art unless otherwise specified. The raw materials used in the examples are specifically shown in table 1.
Table 1 description of the materials
Raw materials Type or specification Manufacturer(s) of
Base asphalt 70# asphalt Jingbo petrochemical
Softening oil Building three-line oil River yin alpha
Epoxy type thermoplastic elastomer ESBC6500 Ningbo boreidi
SBR SBR1502E Qilu petrochemical
Thermoplastic phenolic resin Thermoplastic phenolic resin 2402 Shenzhen Jitian chemical industry
Tackifying resins C5 petroleum tackifying resin Ningbo yuanhua
Stabilizer Peroxy crosslinking agent Strength of salt city
Inorganic filler 200-400 mesh silicate Anda mining industry
Example 1
A high-viscosity pre-paved modified asphalt waterproof coiled material and a preparation method thereof comprise the following steps:
1. preparation of modified asphalt
1) Mixing 45 parts by mass of asphalt and 10 parts by mass of softening oil, slowly heating to 140 ℃, wherein the mixture is in a molten state, slowly adding 10 parts by mass of SBR and 8 parts by mass of epoxy thermoplastic elastomer, uniformly mixing, heating, and rapidly stirring or shearing at 170 ℃ until the mixture is completely dissolved;
2) Heating, adding 5 parts by mass of thermoplastic phenolic resin at 185 ℃, and continuously stirring until the thermoplastic phenolic resin is completely dissolved;
3) Cooling to 160-170 ℃, adding 1 part by mass of stabilizer, rapidly stirring, adding 4 parts by mass of tackifying resin after complete dissolution, and continuously stirring until complete dissolution;
4) At this temperature, 5 parts by mass of an inorganic filler is added, and stirring is continued until uniform mixing is achieved for later use.
2. Porous mineral particle adhesion
1) Coating the modified asphalt on the reinforcement layer of the tire base in a blade mode, wherein the thickness of the modified asphalt on the surface adhered with the mineral particles is 1.4mm;
2) When the temperature of the modified asphalt is 90-100 ℃, porous sintered diatomite with the particle size of 8-10 meshes and the porosity of 40-45 percent is selected along with the traction of the modified asphalt. Uniformly scattering mineral particles on the surface of the modified asphalt by a hopper, wherein the scattering amount is 1.5kg/m2；
3) And (3) cooling, namely applying 3MPa pressure on the surfaces of the mineral particles by using a compression roller when the temperature is 60-70 ℃ so as to enable the mineral particles and the modified asphalt to be mutually embedded.
Example 2
The preparation method of the high-viscosity pre-paved modified asphalt waterproof coiled material comprises the following steps:
1. preparation of modified asphalt
1) Mixing 40 parts by mass of No. 70 asphalt and 15 parts by mass of softening oil, slowly heating to 120 ℃, wherein the mixture is in a molten state, slowly adding 5 parts by mass of SBR and 12 parts by mass of epoxy thermoplastic elastomer, uniformly mixing, heating, and rapidly stirring or shearing at 160 ℃ until the mixture is completely dissolved;
2) Heating, adding 3 parts by mass of thermoplastic phenolic resin at 185 ℃, and continuously stirring until the thermoplastic phenolic resin is completely dissolved;
3) Cooling to 160-170 ℃, adding 0.5 part by mass of stabilizer, rapidly stirring, adding 8 parts by mass of tackifying resin after complete dissolution, and continuously stirring until complete dissolution;
4) At this temperature, 35 parts by mass of an inorganic filler is added, and stirring is continued until uniform mixing is achieved for later use.
2. Porous mineral particle adhesion
1) Coating the modified asphalt on the tyre base reinforcing layer in a scraping way, wherein the thickness of the modified asphalt on the surface adhered with the mineral particles is 1.3mm;
2) When the temperature of the modified asphalt is 110 ℃, porous sintered diatomite with the grain size of 10-12 meshes and the porosity of 40-45 percent is selected along with the traction of the modified asphalt. Uniformly scattering mineral particles on the surface of the modified asphalt by a hopper, wherein the scattering amount is 1.5kg/m2；
3) And (3) cooling, namely applying 3MPa pressure on the surfaces of the mineral particles by using a press roll when the temperature is 80-90 ℃ so as to enable the mineral particles and the modified asphalt to be embedded mutually.
Example 3
The preparation method of the high-viscosity pre-paved modified asphalt waterproof coiled material comprises the following steps:
1. preparation of modified asphalt
1) Mixing 42 parts by mass of No. 70 asphalt and 12 parts by mass of softened oil, slowly heating to 120-160 ℃, wherein the mixture is in a molten state, slowly adding 8 parts by mass of SBR and 10 parts by mass of epoxy thermoplastic elastomer, uniformly mixing, heating, and rapidly stirring or shearing at 160-180 ℃ until the mixture is completely dissolved;
2) Heating, adding 4 parts by mass of thermoplastic phenolic resin at 180-190 ℃, and continuously stirring until the thermoplastic phenolic resin is completely dissolved;
3) Cooling to 160-170 ℃, adding 0.6 part by mass of stabilizer, rapidly stirring, adding 5 parts by mass of tackifying resin after complete dissolution, and continuously stirring until complete dissolution;
4) At this temperature, 16 parts by mass of an inorganic filler was added, and stirring was continued until uniform mixing was achieved for use.
2. Porous mineral particle adhesion
1) Coating the modified asphalt on the reinforcement layer of the tire base in a blade mode, wherein the thickness of the modified asphalt on the surface adhered with the mineral particles is 1.2mm;
2) When the temperature of the modified asphalt is 90-100 ℃, porous sintered diatomite with the particle size of 14-16 meshes and the porosity of 40-45 percent is selected along with the traction of the modified asphalt. Uniformly scattering mineral particles on the surface of the modified asphalt by a hopper, wherein the scattering amount is 1.5kg/m2；
3) And (3) cooling, namely applying 3MPa pressure on the surfaces of the mineral particles by using a compression roller when the temperature is 70-80 ℃ so as to enable the mineral particles and the modified asphalt to be embedded mutually.
Comparative example 1
This comparative example differs from example 1 in that epoxy-type thermoplastic elastomer was replaced with yuhuang SBS7301, where yuhuang SBS7301 is linear gauge.
Comparative example 2
This comparative example differs from example 1 in that a swallowed SBS4402 is used instead of an epoxy-type thermoplastic elastomer, wherein the yurea linear SBS4402 is of star format.
Comparative example 3
This comparative example is different from example 2 in that the amount of the phenol novolak resin added is reduced to 1 part by mass.
Comparative example 4
This comparative example is different from example 2 in that the amount of the phenol novolak resin added is increased to 8 parts by mass.
Comparative example 5
This comparative example differs from example 3 in that the porous mineral particles were changed to non-porous sintered shale, with a particle size of 14-16 mesh.
Comparative example 6
This comparative example is different from example 3 in that the porous mineral particles were changed to ordinary river sand having a particle size of 60 to 80 mesh.
Performance testing of waterproofing membranes
The test method comprises the following steps: the mineral aggregate adhesion test refers to a GB/T328.17-2007B method, and specifically comprises the following steps: mineral pellet adhesion test procedure: and (3) fixing the test piece on a scrubbing machine, scrubbing the surface of the waterproof coiled material test piece along the length direction of the test piece by using a brush with a stainless steel wire, and testing the quality of the mineral particles on the surface which are scrubbed.
The peel strength of the post-cast concrete and the peel strength of the post-cast concrete after soaking in water are both GB/T23457-2017; the method specifically comprises the following steps: and the peel strength with post-cast concrete: and pouring cement mortar on the surface of the test piece according to the standard requirements and curing into the test piece to be tested. When in test, a universal tensile machine is used, one end clamps a test piece, the other end clamps a cement block, the bonding interface of the test piece and cement mortar is 180 degrees, the tensile machine is started, the test piece is peeled off from the surface of the cement mortar, and the peeling force value is recorded.
And the peel strength after soaking in water of post-cast concrete: in the sample preparation process, the coiled material and cement mortar are bonded and maintained for 7d, then the test piece is immersed in water with the temperature of 23 +/-2 ℃ for 28 +/-2 h, the surface water is taken out and sucked dry, and the peel strength is tested according to the method for testing the peel strength of post-cast concrete.
The test results are shown in tables 2-4.
Table 2 shows the performance indexes of the high-viscosity pre-paved modified asphalt waterproof rolls prepared in examples 1-3
Test items Index (I) Example 1 Example 2 Example 3
Mineral granule adhesion/g ≤2 1.0 1.2 0.8
Peel strength/(N/mm) with post-cast concrete ≥1.5 3.6 3.2 3.5
Channeling-resistant water (hydraulic gradient MPa) ≥0.8 1.2 1.2 1.4
Therefore, the high-viscosity pre-paved modified asphalt waterproof coiled material provided by the invention has better peel strength and water channeling resistance.
TABLE 3 Performance index of high-tack Pre-spread modified asphalt waterproofing membranes prepared in example 1 and comparative examples 1 to 2
Test item Index (I) Example 1 Comparative example 1 Comparative example 2
Mineral granule adhesion/g ≤2 1.0 1.6 2.0
Peel strength/(N/mm) with post-cast concrete ≥1.5 3.6 2.4 2.2
Channeling-resistant water (hydraulic gradient MPa) ≥0.8 1.2 1.2 1.0
It can be seen from comparative examples 1 and 2 that the coil manufactured by using the conventional linear and star SBS in place of the ESBC6500 is acceptable, but the peel strength is remarkably reduced.
Table 4 performance index of high viscosity pre-paved modified asphalt waterproofing membrane of example 2 and comparative examples 3 to 4
Test items Index (es) Example 2 Comparative example 3 Comparative example 4
Mineral granule adhesion/g ≤2 1.2 2.1 2.4
Peel strength/(N/mm) with post-cast concrete ≥1.5 3.2 2.0 1.8
Channeling-resistant water (hydraulic gradient) ≥0.8MPa 1.2 1.0 0.9
As is clear from comparative examples 3 and 4, the adhesion between the asphalt and the mineral particles is improved and the bonding strength with the post-cast concrete is remarkably deteriorated with the change in the amount of the phenol resin thermoplastic added.
TABLE 5 Performance indexes of example 3 and comparative examples 5 to 6
Test items Index (I) Example 3 Comparative example 5 Comparative example 6
Mineral granule adhesion/g ≤2 0.8 2.7 2.3
Peel strength/(N/mm) with post-cast concrete ≥1.5 3.5 2.2 2.0
Channeling-resistant water (hydraulic gradient MPa) ≥0.8 1.4 0.6 0.8
As can be seen from comparative examples 5 and 6, the kind of the mineral particles in the present invention has a great influence on both the water breakthrough resistance and the peel strength thereof, and the use of the porous particles of the present invention can effectively improve the peel strength and the water breakthrough resistance of the waterproof roll.
The above detailed description is specific to one possible embodiment of the present invention, and the embodiment is not intended to limit the scope of the present invention, and all equivalent implementations or modifications without departing from the scope of the present invention should be included in the technical scope of the present invention.

Claims (15)

1. The modified asphalt is characterized in that a modifier used by the modified asphalt comprises at least one of thermoplastic phenolic resin and epoxy thermoplastic elastomer.
2. The modified asphalt of claim 1, wherein the phenolic thermoplastic resin has the formula:
Figure FDA0003725518060000011
3. the modified asphalt according to claim 1, wherein the epoxy thermoplastic elastomer is type number ESBC6500.
4. The modified asphalt of claim 1, further comprising: matrix asphalt, softening oil, SBR, tackifying resin, a stabilizer and an inorganic filler.
5. The modified asphalt according to claim 4, wherein the inorganic filler is a silicate having a particle size of 200 to 400 mesh.
6. The modified asphalt of claim 5, which is characterized by comprising the following raw materials in parts by mass: 40-45 parts of matrix asphalt, 10-15 parts of softening oil, 8-12 parts of epoxy thermoplastic elastomer, 5-10 parts of SBR, 3-5 parts of thermoplastic phenolic resin, 4-8 parts of tackifying resin, 0.5-1.0 part of stabilizer and 5-35 parts of inorganic filler.
7. A process for producing a modified asphalt according to any one of claims 1 to 6, which comprises the steps of:
(1) Mixing and melting the matrix asphalt and the softening oil, adding SBR and the epoxy thermoplastic elastomer, heating and uniformly stirring, and dissolving to obtain a mixed solution A;
(2) Heating the mixed solution A obtained in the step (1), adding thermoplastic phenolic resin, continuously stirring, and dissolving to obtain a mixed solution B;
(3) Cooling the mixed solution B obtained in the step (2), adding a stabilizer, continuously stirring, adding tackifying resin after dissolving, and continuously stirring to obtain a mixed solution C;
(4) And (4) adding an inorganic filler into the mixed liquid C obtained in the step (3), and uniformly stirring and mixing to obtain the modified asphalt.
8. The method according to claim 7, wherein in the step (1), the heating temperature of the melt is 120 to 160 ℃; the temperature is increased to 160-180 ℃; in the step (2), the temperature is raised to 180-190 ℃; in the step (3), the temperature is reduced to 160-170 ℃.
9. Use of the modified asphalt according to any one of claims 1 to 6 or the modified asphalt produced by the production method according to any one of claims 7 to 8 in a waterproof sheet.
10. A high-viscosity pre-paved modified asphalt waterproof coiled material is characterized by comprising the modified asphalt of any one of claims 1 to 6 or the modified asphalt prepared by the preparation method of the modified asphalt of any one of claims 7 to 8.
11. The high-viscosity pre-paved modified asphalt waterproof roll material as claimed in claim 10, wherein the upper surface of the modified asphalt is covered with porous mineral particles.
12. The high-viscosity pre-spread modified asphalt waterproofing membrane according to claim 11, characterized in that the porous mineral particles are at least one of diatomaceous earth, mullite and expanded perlite.
13. The high-viscosity pre-paved modified asphalt waterproof coiled material as claimed in claim 11, wherein the particle size of the porous mineral particles is 8-16 meshes, and the porosity is 40-60%.
14. A method for preparing a high-viscosity pre-laid modified asphalt waterproofing membrane as described in any one of claims 10 to 13, comprising the steps of:
s1, forming a modified asphalt layer on a reinforcing layer by using the modified asphalt;
s2, covering porous mineral particles on the upper surface of the modified asphalt layer obtained in the step S1 to obtain a mineral particle layer;
and S3, applying pressure on the surface of the mineral particle layer obtained in the step S2 to enable the porous mineral particles and the modified asphalt to be mutually embedded, and thus obtaining the high-viscosity pre-paved modified asphalt waterproof coiled material.
15. The method according to claim 14, wherein the modified asphalt layer in step S1 has a thickness of 1.2mm or more; the covering conditions of the porous mineral particles in the step S2 are as follows: the modified asphalt has a temperature of 80-150 deg.C and a porous mineral particle spreading amount of 1.2-1.6kg/m2(ii) a The conditions for applying the pressure to the surface in the step S3 are: the temperature of the modified asphalt is 60-120 ℃, and the surface applied pressure is 3-5MPa.
CN202210773657.6A 2022-07-01 2022-07-01 Modified asphalt, preparation method and application thereof, and pre-paved modified asphalt waterproof roll Active CN115260776B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01240595A (en) * 1988-03-18 1989-09-26 Nkk Corp Production of modified pitch
CN107603519A (en) * 2017-09-12 2018-01-19 北京东方雨虹防水技术股份有限公司 For overlaying butyl rubber reaction adhesion coating, its preparation method of the viscous waterproof roll of reaction and overlaying the viscous waterproof roll of reaction
CN112831191A (en) * 2021-01-29 2021-05-25 远大洪雨（唐山）防水材料有限公司 Modified asphalt-based high-strength pre-laid waterproof coiled material and preparation method thereof
CN113717687A (en) * 2021-09-09 2021-11-30 昆山科顺防水材料有限公司 Environment-friendly modified asphalt self-adhesive coating material composition, environment-friendly modified asphalt self-adhesive coating material, and preparation method and application thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01240595A (en) * 1988-03-18 1989-09-26 Nkk Corp Production of modified pitch
CN107603519A (en) * 2017-09-12 2018-01-19 北京东方雨虹防水技术股份有限公司 For overlaying butyl rubber reaction adhesion coating, its preparation method of the viscous waterproof roll of reaction and overlaying the viscous waterproof roll of reaction
US20200270489A1 (en) * 2017-09-12 2020-08-27 Beijing Oriental Yuhong Waterproof Technology Co., Ltd. Butyl rubber reactive bonding layer for pre-paving reactive-bonding waterproofing coiled material, preparation method thereof, and pre-paving reactive-bonding waterproofing coiled material
CN112831191A (en) * 2021-01-29 2021-05-25 远大洪雨（唐山）防水材料有限公司 Modified asphalt-based high-strength pre-laid waterproof coiled material and preparation method thereof
CN113717687A (en) * 2021-09-09 2021-11-30 昆山科顺防水材料有限公司 Environment-friendly modified asphalt self-adhesive coating material composition, environment-friendly modified asphalt self-adhesive coating material, and preparation method and application thereof

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