CN111777964A - A kind of self-adhesive modified asphalt building waterproofing membrane and preparation method and construction method - Google Patents

Abstract

The invention belongs to the field of building waterproof materials, and discloses a self-adhesive modified bitumen building waterproofing membrane, a preparation method and a construction method; The isolation protective film of the bonding layer; wherein, the bonding layer is pre-implanted with a polyurethane prepolymer in the butyl rubber self-adhesive layer. During construction, a layer of amino-terminated polyether and liquid amine is pre-sprayed on the building base surface. The dispersion liquid of the butyl rubber makes the polyurethane prepolymer rapidly expand with the amino-terminated polyether and liquid amine on the building base surface to form a polyurea layer while the butyl rubber is bonded. The polyurea is extremely hydrophobic and insensitive to environmental humidity. , It can be constructed normally under extremely harsh environmental conditions, so as to effectively bond the waterproof membrane to the building base without being affected by the water on the base.

Description

A kind of self-adhesive modified asphalt building waterproofing membrane and preparation method and construction method

technical field

The invention belongs to the field of building waterproof materials, in particular to a waterproof roll material for construction projects, in particular to a self-adhesive modified bitumen building waterproof roll material and a preparation method and a construction method.

Background technique

As an important construction part of current construction projects, building waterproofing has made great breakthroughs in waterproofing performance and construction convenience with the development of new material technology. Such as rigid mortar waterproofing agent, cement-based (rigid) waterproofing coating, permeable crystalline waterproofing coating; flexible polymer waterproofing coating and waterproofing membrane are widely used in building waterproofing engineering.

As a material that can be constructed in a large area and has high water resistance, waterproof membrane is widely used in areas with high waterproof requirements such as building basements and tunnels. In particular, the flexibility of the waterproof membrane can effectively prevent cracking caused by underground deformation, which is difficult to achieve with other rigid waterproof materials. At present, the commonly used waterproofing membranes mainly include modified asphalt waterproofing membranes, polyethylene polypropylene waterproofing membranes, PVC waterproofing membranes, EPDM waterproofing membranes, etc. According to the use practice, in the waterproof construction of large-scale underground projects, tunnels and other buildings, the modified bitumen waterproofing membrane has become the first choice. The main reason is that the asphalt waterproofing membrane is superior in self-healing compared with other membranes, and can adapt to waterproofing such as underground subsidence deformation. After the occurrence of damaged micro-cracks, the self-flow of asphalt can achieve self-healing.

The firm combination of the asphalt membrane and the building base directly determines the waterproof effect and waterproof durability. After the membrane and the building base are closely bonded and bonded, even if the building base is cracked, the asphalt waterproofing membrane will be slightly deformed and dense to repair the crack; however, if the bonding is not strong, the membrane will be separated from the building base to form an empty drum. , it is easy to channel water seepage. The biggest obstacle in the use of the waterproofing membrane is the bonding problem with the base surface. The traditional construction of asphalt waterproofing membrane is mainly to heat the membrane through a thermal spray gun to make the surface hot melt and then bond with the building base. Although the cost of hot-melt construction is low, it is easy to cause damage to the coil and make the surface aging; and it is one-time bonding with the building base. Once the bonding contact is not tight, it will cause hollowing, which is difficult to repair. It's easy to get water.

The cold bonding method is the main direction of the development of the asphalt waterproofing membrane at present. The self-adhesion of the coil is realized by setting the adhesive layer on the surface of the coil. At present, self-adhesive modified asphalt-based waterproofing membranes are gradually popularized and used in the market. On the one hand, the self-adhesive modified bitumen-based waterproofing membrane is simple and convenient to construct; on the other hand, it is tightly bonded to the building base surface and will not form hollow;

However, the adhesive layer of the existing self-adhesive modified asphalt building waterproofing membrane is mainly an adhesive formed by butyl rubber, terpene resin, hydrogenated rosin, naphthenic oil and the like. The adhesive force mainly depends on the secondary bonds such as van der Waals force or hydrogen bond between the bonding layer and the concrete surface. Furthermore, the self-adhesive asphalt waterproofing membrane has strict requirements on the construction of the waterproof base surface. It is difficult for most construction environments to meet these requirements. In particular, most of the base surface contains water, which will cause a decrease in the bond strength.

SUMMARY OF THE INVENTION

In view of the poor bonding firmness between the self-adhesive modified asphalt building waterproofing membrane and the building base, and the harsh requirements for the water content of the building base during bonding construction; in order to improve the adhesion of the self-adhesive modified asphalt building waterproofing membrane The present invention provides a self-adhesive modified asphalt building waterproofing membrane material; furthermore, provides a preparation method and a construction method of the self-adhesive modified bitumen building waterproofing membrane material.

First of all, the first object of the present invention is a self-adhesive modified asphalt building waterproofing membrane, which is characterized by: comprising a modified asphalt layer, an adhesive layer and an isolation protective film applied to the adhesive layer; wherein:

The modified asphalt layer is prepared by the following method:

3-5 parts by weight of asbestos, 1-3 parts by weight of nano-silicon dioxide, 5-10 parts by weight of recycled rubber powder, 10-15 parts by weight of SBS, 1-2 parts by weight of coumarone resin, 0.01-0.03 parts by weight of maleic anhydride parts by weight, 0.1-0.3 parts by weight of antioxidants, 3-5 parts by weight of bentonite, 80-100 parts by weight of No. 90 bitumen materials are added to the mixer and mixed evenly, and then sent to a twin-screw extruder for melting and kneading. Die extrusion and three-roll calendering to obtain a modified asphalt layer with a thickness of 1.0-2.0 mm;

The adhesive layer is prepared by the following method:

Add 10-15 parts by weight of polyether polyol into a stirring vessel, heat it to 110°C, then dehydrate in a vacuum for 1 hour, cool down to 40-50°C, add 15-20 parts by weight of polyisocyanate, and react at 80°C for 1-2 hours, Keep the temperature at 50°C for 1-3 hours to obtain a polyurethane prepolymer; input the polyurethane prepolymer into a colloid mill, and then add 30-40 parts by weight of No. 130 asphalt, 10-15 parts by weight of styrene-butadiene rubber, and 5-10 parts by weight of rosin The resin and 15-20 parts by weight of aromatic hydrocarbon oil are ground into a jelly, which is used as an adhesive layer;

The isolation protective film is one of PET film, PVC film and PP film.

Preferably, the antioxidant is selected from one of antioxidant 1010 and antioxidant 168 or a combination of both.

Preferably, the reclaimed rubber rubber powder is reclaimed rubber prepared by grinding waste tires with a particle size of less than 100 mesh, which mainly reduces costs and increases the toughness of the coil.

Preferably, on the one hand, the nano-silica can increase the compactness of the coil, and the addition of nano-silica is beneficial to the combination with concrete.

The second object of the present invention is a kind of preparation method of self-adhesive modified bitumen building waterproofing membrane, it is characterized in that, the concrete preparation method is as follows:

(1) Add 10-15 parts by weight of polyether polyol into a stirring vessel, heat to 110°C, then dehydrate in vacuum for 1 hour, cool down to 40-50°C, add 15-20 parts by weight of polyisocyanate, and react at 80°C for 1- For 2 hours, keep the temperature at 50 °C for 1-3 hours to obtain a polyurethane prepolymer; input the polyurethane prepolymer into a colloid mill, and then add 30-40 parts by weight of No. 130 asphalt, 10-15 parts by weight of styrene-butadiene rubber, 5-10 parts by weight 15-20 parts by weight of rosin resin and 15-20 parts by weight of aromatic hydrocarbon oil are ground into jelly;

(2) 3-5 parts by weight of asbestos, 1-3 parts by weight of nano-silicon dioxide, 5-10 parts by weight of recycled rubber powder, 10-15 parts by weight of SBS, 1-2 parts by weight of coumarone resin, maleic anhydride 0.01-0.03 parts by weight, 0.1-0.3 parts by weight of antioxidants, 3-5 parts by weight of bentonite, 80-100 parts by weight of No. 90 asphalt materials are added to the mixer and mixed evenly, and then sent to the twin-screw extruder for melting and kneading. T"-shaped die extrusion and three-roll calendering to obtain a modified asphalt layer with a thickness of 1.0-2.0mm;

(3) Step (2) The calendered modified asphalt layer is scraped and coated on the modified asphalt layer with the jelly obtained in step (1) while it is still hot; then an isolation protective film is applied, the roller is flattened, coiled, sealed and packaged to obtain A self-adhesive modified asphalt building waterproofing membrane.

Preferably, the melting and kneading temperature of the twin-screw extruder is set at 130-140°C; the temperature of the three-roller is controlled at 50-60°C, if the temperature is too high, the rollers will stick; if the temperature is too low, the subsequent glue will be affected adhesiveness of the material.

Further preferably, the jelly is blade-coated on the modified asphalt layer, and the blade-coating thickness is 0.3-0.5mm.

The third object of the present invention is a kind of construction method of self-adhesive modified bitumen building waterproofing membrane, it is characterized in that, the concrete construction method is:

(1) Clean up the sundries, floating dust and water stains on the construction base surface;

(2) Disperse 20-30 parts by weight of amino-terminated polyether and 10-15 parts by weight of liquid amine evenly, and spray and wet the building base surface;

(3) Remove the isolation protective film of the self-adhesive modified asphalt building waterproofing membrane, quickly paste it on the base surface, compact and smooth, and complete the paving.

Preferably, the amino-terminated polyether is D-2000 amino-terminated polyether produced by BASF. D-2000 amino-terminated polyether is an active chain extender for polyurethane, which can rapidly extend the chain of the polyurethane prepolymer.

Preferably, the liquid amine is selected from the one in diethyltoluenediamine, dimethylthiotoluenediamine, N,N'-dialkylmethyldiphenylamine.

Different from the conventional self-adhesive bitumen waterproofing membrane, in order to increase the bonding firmness between the modified bitumen waterproofing membrane and the building base surface, and avoid the influence of the moisture contained in the building base surface on the adhesion, the present invention uses a butyl rubber self-adhesive solution. A polyurethane prepolymer is pre-implanted in the adhesive layer. During construction, a dispersion of amino-terminated polyether and liquid amine is pre-sprayed on the base surface of the building, so that when the butyl rubber is bonded, the polyurethane prepolymer is The body quickly expands with the amino-terminated polyether and liquid amine on the building base surface to form a polyurea layer. Polyurea is extremely hydrophobic and insensitive to environmental humidity. Construction, so as to effectively bond the coil to the building base without being affected by the moisture of the base. The self-adhesive modified asphalt building waterproofing membrane obtained by the invention has wide adaptability, is especially suitable for construction in humid environment, and is suitable for waterproofing of basements, artificial lakes, culverts, tunnels, subways and other underground waterproofing projects as well as waterproofing construction in complex environments .

A self-adhesive modified asphalt building waterproofing membrane, compared with the self-adhesive waterproofing membrane, the outstanding technical advantages are reflected in:

(1) In the present invention, the polyurethane prepolymer is pre-planted in the self-adhesive layer, and a layer of amino-terminated polyether and liquid amine dispersion is sprayed on the base surface of the building during construction, which can quickly make the polyurethane prepolymer form polyurea bonding On the base surface, it has strong adaptability in humid environment and will not affect the adhesion due to environmental humidity.

(2) The self-adhesive modified asphalt building waterproofing membrane of the present invention has wide adaptability, is especially suitable for construction in humid environment, and is suitable for waterproofing of basements, artificial lakes, culverts, tunnels, subways and other underground waterproofing projects as well as waterproofing in complex environments construction. After paving, there will be no bulging or water channeling due to the humidity of the environment, which effectively prevents the infiltration of water, and even if it penetrates into the water, it will not run around.

(3) The self-adhesive modified asphalt building waterproofing membrane of the present invention further expands the use environment of the waterproofing membrane, so that the construction no longer puts forward harsh requirements on the building base surface, and the construction progress is greatly improved.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings:

Fig. 1 is a schematic diagram of a self-adhesive modified asphalt building waterproofing membrane of the present invention. 1: Modified asphalt layer; 2: Adhesive layer; 3: Isolation protective film.

Detailed ways

The following examples are intended to further describe the content of the present invention, rather than limit the protection scope of the claims of the present invention.

Example 1

A preparation method of self-adhesive modified asphalt building waterproofing membrane:

(1) 15 parts by weight of polyethylene glycol ether with a molecular weight of 3000 was added to a stirring vessel, heated to 110°C, then dehydrated in a vacuum for 1 hour, cooled to 40°C, and added with 20 parts by weight of 4,4'-diphenylmethane diphenylmethane Isocyanate was reacted at 80 °C for 2 hours, and kept at 50 °C for 1 hour to obtain a polyurethane prepolymer; the polyurethane prepolymer was input into a colloid mill, and then 30 parts by weight of No. 130 asphalt, 10 parts by weight of styrene-butadiene rubber, 10 parts by weight of styrene-butadiene rubber were added. Rosin resin and 20 parts by weight of aromatic oil are ground into jelly;

(2) 5 parts by weight of asbestos, 1 part by weight of nano-silica, 5 parts by weight of recycled rubber powder, 15 parts by weight of SBS, 2 parts by weight of coumarone resin, 0.01 part by weight of maleic anhydride, 0.1 part by weight of 1010 antioxidants , 3 parts by weight of bentonite, and 100 parts by weight of No. 90 bitumen material were added to the mixer to mix evenly, then sent to a twin-screw extruder for melting and kneading at 130-140°C, extruded through a "T" die, and rolled with three rolls. The temperature of the three rolls is controlled at 50-60°C to obtain a modified asphalt layer with a thickness of 2.0mm;

(3) Step (2) The calendered modified asphalt layer is scraped on the modified asphalt layer with the jelly obtained in step (1) while it is still hot, with a thickness of 0.5mm; Take, seal and package to obtain a self-adhesive modified asphalt building waterproofing membrane.

Construction method:

(1) Clean up the sundries, floating dust and water stains on the construction base surface;

(2) Disperse 30 parts by weight of D-2000 amino-terminated polyether and 15 parts by weight of diethyltoluenediamine evenly, and spray and wet the base surface of the building;

(3) Remove the isolation protective film of the self-adhesive modified asphalt building waterproofing membrane, quickly paste it on the base surface, compact and smooth, and complete the paving.

Example 2

A preparation method of self-adhesive modified asphalt building waterproofing membrane:

(1) 10 parts by weight of polypropylene glycol ether with a molecular weight of 2000 were added to a stirring vessel, heated to 110°C, then dehydrated in a vacuum for 1 hour, cooled to 50°C, added 15 parts by weight of 4,4'-diphenylmethane diisocyanate, and heated to 80°C. ℃ reaction for 1 hour, kept at 50 ℃ for 1 hour to obtain a polyurethane prepolymer; input the polyurethane prepolymer into a colloid mill, and then add 40 parts by weight of No. 130 asphalt, 15 parts by weight styrene-butadiene rubber, 5 parts by weight rosin resin, 15 parts by weight Aromatic oil in parts by weight is ground into a jelly;

(2) 3 parts by weight of asbestos, 1 part by weight of nano-silica, 10 parts by weight of recycled rubber powder, 15 parts by weight of SBS, 2 parts by weight of coumarone resin, 0.01 part by weight of maleic anhydride, 0.2 part by weight of 1010 antioxidants , 5 parts by weight of bentonite, and 90 parts by weight of No. 90 bituminous materials are added to the mixer and mixed evenly, and then sent to a twin-screw extruder for melting and kneading at 130-140 ℃, extruded through a "T" die, and rolled with three rolls. The temperature of the three rolls is controlled at 50-60°C to obtain a modified asphalt layer with a thickness of 2.0mm;

(3) Step (2) The calendered modified asphalt layer is scraped on the modified asphalt layer with the jelly obtained in step (1) while it is still hot, with a thickness of 0.4 mm; Flattening, coiling, sealing and packaging to obtain a self-adhesive modified bitumen building waterproofing membrane.

Construction method:

(1) Clean up the sundries, floating dust and water stains on the construction base surface;

(2) Disperse 20 parts by weight of D-2000 amino-terminated polyether and 15 parts by weight of N,N'-dialkylmethyldiphenylamine evenly, and spray and wet the base surface of the building;

(3) Remove the isolation protective film of the self-adhesive modified asphalt building waterproofing membrane, quickly paste it on the base surface, compact and smooth, and complete the paving.

Example 3

A preparation method of self-adhesive modified asphalt building waterproofing membrane:

(1) 12 parts by weight of polyethylene glycol ether with a molecular weight of 2000 were added into a stirring vessel, heated to 110°C, then dehydrated in vacuum for 1 hour, cooled to 40°C, and added with 20 parts by weight of 4,4'-diphenylmethane diphenylmethane The isocyanate was reacted at 80°C for 2 hours, and kept at 50°C for 3 hours to obtain a polyurethane prepolymer; the polyurethane prepolymer was input into a colloid mill, and then 40 parts by weight of No. 130 asphalt, 10 parts by weight of styrene-butadiene rubber, and 8 parts by weight were added. Rosin resin and 18 parts by weight of aromatic hydrocarbon oil are ground into jelly;

(2) 5 parts by weight of asbestos, 2 parts by weight of nano-silicon dioxide, 7 parts by weight of recycled rubber powder, 15 parts by weight of SBS, 2 parts by weight of coumarone resin, 0.01 part by weight of maleic anhydride, 0.3 part by weight of 1010 antioxidants , 3 parts by weight of bentonite, and 100 parts by weight of No. 90 bitumen material were added to the mixer to mix evenly, then sent to a twin-screw extruder for melting and kneading at 130-140°C, extruded through a "T" die, and rolled with three rolls. The temperature of the three rolls is controlled at 50-60°C to obtain a modified asphalt layer with a thickness of 2.0mm;

(3) Step (2) The calendered modified asphalt layer is scraped on the modified asphalt layer with the jelly obtained in step (1) while it is still hot, with a thickness of 0.3mm; Flattening, coiling, sealing and packaging to obtain a self-adhesive modified bitumen building waterproofing membrane.

Construction method:

(1) Clean up the sundries, floating dust and water stains on the construction base surface;

(2) Disperse 25 parts by weight of D-2000 amino-terminated polyether and 15 parts by weight of diethyltoluenediamine evenly, and spray and wet the base surface of the building;

(3) Remove the isolation protective film of the self-adhesive modified asphalt building waterproofing membrane, quickly paste it on the base surface, compact and smooth, and complete the paving.

Comparative Example 1

A preparation method of self-adhesive modified asphalt building waterproofing membrane:

(1) Grinding 30 parts by weight of No. 130 asphalt, 10 parts by weight of styrene-butadiene rubber, 10 parts by weight of rosin resin, and 20 parts by weight of aromatic hydrocarbon oil into a jelly;

(2) 5 parts by weight of asbestos, 1 part by weight of nano-silica, 5 parts by weight of recycled rubber powder, 15 parts by weight of SBS, 2 parts by weight of coumarone resin, 0.01 part by weight of maleic anhydride, 0.1 part by weight of 1010 antioxidants , 3 parts by weight of bentonite, and 100 parts by weight of No. 90 bitumen material were added to the mixer to mix evenly, then sent to a twin-screw extruder for melting and kneading at 130-140°C, extruded through a "T" die, and rolled with three rolls. The temperature of the three rolls is controlled at 50-60°C to obtain a modified asphalt layer with a thickness of 2.0mm;

(3) Step (2) The calendered modified asphalt layer is scraped on the modified asphalt layer with the jelly obtained in step (1) while it is still hot, with a thickness of 0.5mm; Take, seal and package to obtain a self-adhesive modified asphalt building waterproofing membrane.

Adhesive peel strength test:

Referring to the requirements of GB/T23260-2009 (waterproofing membrane with self-adhesive layer), test the adhesiveness of the waterproofing membrane obtained in Example 1-3 and Comparative Example 1-2.

Cut the waterproof coils of Examples 1-3 and Comparative Example 1 into test samples of 50 × 75mm, prepare samples according to GB/T 328.20-2007, and paste the coils on a smooth aluminum plate cleaned by a solvent, and then use a 2kg weight. , 3 times of rolling with a width of 50mm, stand for 24h, and measure the peel strength. The test results are shown in Table 1.

Cut the waterproof coils of Examples 1-3 and Comparative Example 1 into test samples of 50 × 75mm, prepare samples according to GB/T 328.20-2007, and paste the coils on a smooth aluminum plate cleaned by a solvent, and then use a 2kg weight. , 3 times of rolling with a width of 50mm, stand for 24h, soak in 23 ℃ water for 7d, then take it out, put it for 24h, and measure the peel strength. The test results are shown in Table 1.

Cut the waterproof coils of Examples 1-3 and Comparative Example 1 into test samples of 50×75mm, wipe the water stains on the smooth aluminum plate, paste the coils, and then press 3 times with a 2kg roller with a width of 50mm, After standing for 24h, the peel strength was measured. The test results are shown in Table 1.

Cut the waterproof coils of Examples 1-3 and Comparative Example 1 into test samples of 50 × 75 mm, and spray the dispersion of amino-terminated polyether and diethyltoluenediamine combination after wiping water on the smooth aluminum plate, and the coils After pasting, it was pressed 3 times with a roller with a weight of 2 kg and a width of 50 mm, and it was allowed to stand for 24 hours to measure the peel strength. The test results are shown in Table 1.

Table 1:

Through the above test, the self-adhesive modified bitumen waterproofing membrane obtained by the present invention has obvious improvement in the adhesion performance of the aluminum plate after wiping the water and spraying the dispersion liquid. In general, the present invention has similar adhesion performance to Comparative Example 1 without prepolymerized polyurethane adhesive layer; but in a wet environment, the sprayed dispersion not only quickly makes the polyurethane prepolymer form polyurea to bond to the base surface, It is not affected by the humid environment, and the bonding strength is significantly improved. Comparative Example 1 does not have a pre-planted polyurethane prepolymer, and the adhesiveness decreases significantly in a humid environment. It is difficult to meet the standard requirements (greater than 1.5N/mm).

It is to be understood that the exemplary embodiments described herein are to be regarded as illustrative and not restrictive. Furthermore, descriptions of each feature or aspect in each embodiment shall be applicable to other similar features or aspects in other embodiments.

Claims (9)

1. a self-adhesive modified bitumen building waterproofing membrane, is characterized in that: comprise modified bitumen layer, adhesive layer and the isolation protective film that is applied to adhesive layer; Wherein: The modified asphalt layer is prepared by the following method: 3-5 parts by weight of asbestos, 1-3 parts by weight of nano-silicon dioxide, 5-10 parts by weight of recycled rubber powder, 10-15 parts by weight of SBS, 1-2 parts by weight of coumarone resin, 0.01-0.03 parts by weight of maleic anhydride parts by weight, 0.1-0.3 parts by weight of antioxidants, 3-5 parts by weight of bentonite, 80-100 parts by weight of No. 90 bitumen materials are added to the mixer and mixed evenly, and then sent to a twin-screw extruder for melting and kneading. Die extrusion and three-roll calendering to obtain a modified asphalt layer with a thickness of 1.0-2.0 mm; The adhesive layer is prepared by the following method: Add 10-15 parts by weight of polyether polyol into a stirring vessel, heat it to 110°C, then dehydrate in a vacuum for 1 hour, cool down to 40-50°C, add 15-20 parts by weight of polyisocyanate, and react at 80°C for 1-2 hours, Keep the temperature at 50°C for 1-3 hours to obtain a polyurethane prepolymer; input the polyurethane prepolymer into a colloid mill, and then add 30-40 parts by weight of No. 130 asphalt, 10-15 parts by weight of styrene-butadiene rubber, and 5-10 parts by weight of rosin The resin and 15-20 parts by weight of aromatic hydrocarbon oil are ground into a jelly, which is used as an adhesive layer; The isolation protective film is one of PET film, PVC film and PP film. 2 . The self-adhesive modified bitumen building waterproofing membrane according to claim 1 , wherein the antioxidant is selected from one of antioxidant 1010 and antioxidant 168 or a composite of both. 3 . 3 . The self-adhesive modified asphalt building waterproofing membrane according to claim 1 , wherein the reclaimed rubber powder is reclaimed rubber prepared by grinding waste tires with a particle size of less than 100 meshes. 4 . 4. a preparation method of self-adhesive modified bitumen construction waterproofing membrane as described in any one of claim 1-3, is characterized in that: concrete preparation method is as follows: (1) Add 10-15 parts by weight of polyether polyol into a stirring vessel, heat to 110°C, then dehydrate in vacuum for 1 hour, cool down to 40-50°C, add 15-20 parts by weight of polyisocyanate, and react at 80°C for 1- For 2 hours, keep the temperature at 50 °C for 1-3 hours to obtain a polyurethane prepolymer; input the polyurethane prepolymer into a colloid mill, and then add 30-40 parts by weight of No. 130 asphalt, 10-15 parts by weight of styrene-butadiene rubber, 5-10 parts by weight 15-20 parts by weight of rosin resin and 15-20 parts by weight of aromatic hydrocarbon oil are ground into jelly; (2) 3-5 parts by weight of asbestos, 1-3 parts by weight of nano-silicon dioxide, 5-10 parts by weight of recycled rubber powder, 10-15 parts by weight of SBS, 1-2 parts by weight of coumarone resin, maleic anhydride 0.01-0.03 parts by weight, 0.1-0.3 parts by weight of antioxidants, 3-5 parts by weight of bentonite, 80-100 parts by weight of No. 90 asphalt materials are added to the mixer and mixed evenly, and then sent to the twin-screw extruder for melting and kneading. T"-shaped die extrusion and three-roll calendering to obtain a modified asphalt layer with a thickness of 1.0-2.0mm; (3) Step (2) The calendered modified asphalt layer is scraped and coated on the modified asphalt layer with the jelly obtained in step (1) while it is still hot; then an isolation protective film is applied, the roller is flattened, coiled, sealed and packaged to obtain A self-adhesive modified asphalt building waterproofing membrane. 5. The preparation method of the self-adhesive modified bitumen waterproofing membrane according to claim 4, wherein the temperature of the twin-screw extruder is set at 130-140°C; the temperature of the three-roller is controlled at 50-60℃. 6 . The method for preparing a self-adhesive modified asphalt building waterproofing membrane according to claim 4 , wherein the jelly is scraped on the modified asphalt layer, and the scraped coating thickness is 0.3-0.5 mm. 7 . 7. a construction method of self-adhesive modified bitumen building waterproofing membrane as claimed in claim 1, is characterized in that, concrete construction method is: (1) Clean up the sundries, floating dust and water stains on the construction base surface; (2) Disperse 20-30 parts by weight of amino-terminated polyether and 10-15 parts by weight of liquid amine evenly, and spray and wet the building base surface; (3) Remove the isolation protective film of the self-adhesive modified asphalt building waterproofing membrane, quickly paste it on the base surface, compact and smooth, and complete the paving. 8 . The construction method of the self-adhesive modified asphalt building waterproofing membrane according to claim 7 , wherein the amino-terminated polyether is selected from D-2000 amino-terminated polyether. 9 . 9. the construction method of self-adhesive modified bitumen building waterproofing membrane according to claim 7, is characterized in that: described liquid amine selects diethyltoluenediamine, dimethylthiotoluenediamine, N,N'- One of the dialkyl methyl diphenylamines.

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