A waterproofing roll material coating, its preparation method and application

Abstract

The application relates to the technical field of building materials, in particular to a waterproof roll material coating, a preparation method and application thereof. The waterproof roll material coating comprises asphalt, a modified component, a functional additive and a filler; the asphalt is used in an amount of 35-55% in mass percentage; the modified component comprises SBR 1-10 parts, SBS 1-10 parts, SIS 1-5 parts, thermoplastic rubber SAMYH-1901H 1-5 parts and alkali lime 1-5 parts in weight parts. In the modified asphalt waterproof roll coating, alkali lime is added, which can fill pores and increase the compactness, and can also cooperate with various modifiers and functional additives to significantly improve the initial adhesion of the asphalt roll material and the adhesion with the cement concrete base surface, so that the hollow drum phenomenon of the roll material and the base surface is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building materials, in particular to a waterproofing membrane coating material and a preparation method and application thereof. BACKGROUND

[0002] Wet-laid asphalt waterproofing membrane is a kind of waterproofing material that is directly pasted with cement slurry and other materials. This process does not require the application of a base treatment agent, not only simplifying the construction steps, but also enabling the membrane to be tightly bonded to the cement base, forming a high-strength waterproofing whole. This kind of membrane uses high-quality petroleum asphalt as the base material and is often modified by adding elastomers such as SBS and SBR and tackifiers to improve its low-temperature flexibility and adhesion performance. The membrane usually contains a high-toughness polyethylene film or polyester base cloth as a reinforcing base to ensure its mechanical properties and dimensional stability. To facilitate storage and construction, a layer of silicone release film is applied to the self-adhesive surface to prevent the membrane from sticking together before use.

[0003] In practical applications, there are still some key problems with wet-laid asphalt waterproofing membranes that need to be addressed. Among them, the interface adhesion failure is particularly prominent. This mainly manifests as poor adhesion between the asphalt layer and the cement base, which can easily lead to peeling, hollowing, and even falling off, thereby causing the "water channeling" phenomenon - that is, water flowing disorderly under the waterproofing layer, which can ultimately result in the loss of waterproofing function. The reasons for this problem are multifaceted: first, the asphalt material itself has low polarity, making it difficult to form a stable chemical adhesion with the cement base; second, the lack of micro-roughness on the surface of the base weakens the physical embedding effect; in addition, the water remaining on the interface during construction forms a weakened layer, further reducing the adhesion strength of the interface. Another problem is that the material's resistance to heat and oxygen aging needs to be improved. When the membrane is exposed to high temperatures or oxidative environments for a long time, the asphalt components will gradually oxidize and harden, losing their original flexibility and becoming brittle. At the same time, the high molecular polymers such as SBS used for modification will also degrade due to heat and oxygen, with their molecular chains breaking, greatly reducing their toughening effect. This internal and external aging ultimately leads to the shrinkage and cracking of the membrane, reducing its adhesion and durability, and thus shortening the effective service life of the waterproofing layer. SUMMARY

[0004] To solve the problems existing in the prior art, the present application provides a waterproofing membrane coating material and a preparation method and application thereof.

[0005] In a first aspect, the present application provides a modified asphalt composition, comprising: asphalt, a modifying component, a functional additive, and a filler; the amount of the asphalt is 35-55% by mass percentage;

[0006] The modified component includes, in parts by weight, SBR 1-10 parts, SBS 1-10 parts, SIS 1-5 parts, thermoplastic rubber SAMYH-1901H 1-5 parts, and soda lime 1-5 parts.

[0007] The present application is directed to the modification of asphalt using SBR, SBS, SIS, thermoplastic rubber SAMYH-1901H, and soda lime, wherein the addition of soda lime can chemically react with various components in cement to generate more gel materials, fill pores, and increase density. At the same time, soda lime and SBR, SBS, SIS, thermoplastic rubber SAMYH-1901H modify asphalt to form a more stable network structure, which can ultimately form a high bonding force and stable chemical-physical bonding structure between the coating material and cement, and also has high weather resistance.

[0008] Further, the modified component further includes, in parts by weight, asphalt heat-resistant modifier 0.2-1 parts. The asphalt heat-resistant modifier of the present application is a modifier that modifies asphalt and improves its heat resistance. For example, a polymer modifier, a rubber modifier, a chemical modifier, or natural asphalt that has the ability to improve the heat resistance of asphalt.

[0009] In some embodiments of the present application, the asphalt heat-resistant modifier is a polymer modifier. Preferably, it is a reactive polymer modifier, and further preferably it is Titan TM7686.

[0010] Further, the asphalt is heavy asphalt.

[0011] The heavy asphalt of the present application is asphalt that has certain high-temperature stability, anti-aging ability, and heavy traffic handling capacity, including various models such as 50#, 70#, and 90#. The present application preferably uses 70# and 90# heavy asphalt, which is modified by SBR, SBS, SIS, thermoplastic rubber SAMYH-1901H, and soda lime to form a more stable network and bonding structure.

[0012] Further, the mass ratio of the asphalt, the modified component, the functional additive, and the filler is (35-55):(5-33):(8-21):(20-30); the functional additive includes rubber oil and / or tire rubber powder; and the filler is heavy calcium.

[0013] Further, the functional additive includes, in parts by weight, rubber oil 5-10 parts and tire rubber powder 3-10 parts.

[0014] The rubber oil is a functional additive commonly used in the preparation process of modified asphalt material, and is mainly divided into aromatic oil, naphthenic oil and paraffin oil, etc., which mainly plays the role of plasticizer or softening agent. The rubber oil in the application also plays a role in improving the compatibility between the rubber and each modified component, and promotes the formation of a more uniform and stable three-dimensional network structure.

[0015] In a second aspect, the application provides a waterproof coiled material coating, comprising the modified asphalt composition described above.

[0016] In a third aspect, the application provides a preparation method of the waterproof coiled material coating described above, comprising:

[0017] (1) mixing the asphalt and the rubber oil according to a predetermined ratio, heating and stirring to mix uniformly;

[0018] (2) adding SBR, SBS, SIS and SAMYH-1901H and stirring to mix uniformly when the temperature rises to 130-180℃;

[0019] (3) adding lime and tire rubber powder, heating to above 180℃ and stirring to mix uniformly;

[0020] (4) adding heavy calcium carbonate and stirring to mix uniformly, and cooling to 170-175℃.

[0021] Further, in step (1), the stirring rate is 400-600 r / min;

[0022] In step (2), the stirring rate is 800-1200 r / min, and the stirring time is 30-45 min;

[0023] In step (3), the stirring rate is 1200-1500 r / min, and the stirring time is 2.5-3 h.

[0024] In a fourth aspect, the application provides a waterproof coiled material, which comprises the waterproof coiled material coating described above.

[0025] In a fifth aspect, the application provides the application of the modified asphalt composition described above, or the waterproof coiled material coating described above, in one or more of the preparation of a sealing layer, an adhesive layer, a protective layer or a waterproof layer.

[0026] The application has the following beneficial effects:

[0027] 1. The modified asphalt waterproof coiled material coating provided by the application can significantly improve the initial adhesion of the asphalt coiled material and the adhesion to the cement concrete base surface, and effectively reduce the occurrence of hollowing of the coiled material and the base surface, through the interaction of heavy duty asphalt, SBR, SBS, SIS, SAMYH-1901H, tire rubber powder, lime and heavy calcium carbonate powder.

[0028] 2、The wet modified asphalt waterproof coiled material coating agent provided by the application adds soda lime, which can increase the density and reduce the porosity through chemical reaction, and at the same time, is mixed with SBR, SBS, SIS, SAMYH-1901H and asphalt to modify and crosslink to form a more stable network structure, thereby significantly improving the aging resistance, stability, weather resistance and bonding performance.

[0029] 3、The modified asphalt waterproof coiled material provided by the application is suitable for various construction methods, including hot melting method, self-adhesion method, cold adhesion method, mechanical fixing method and wet laying method, and is especially suitable for the wet laying method. DETAILED DESCRIPTION

[0030] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0031] In the following examples, the experimental methods involved are all conventional methods in the art, for example, refer to the experimental manuals in the art, or follow the suggested conditions in the manufacturer's instructions, unless otherwise specified.

[0032] In the following examples, the experimental materials and reagents involved can be obtained from commercial channels, unless otherwise specified.

[0033] Example 1

[0034] The present embodiment provides a modified asphalt waterproof coiled material coating agent and a preparation method thereof, which comprises the following raw material components:

[0035] Table 1 Raw material components of Example 1

[0036]

[0037] SBS is styrene-butadiene-styrene block copolymer, SBR is styrene-butadiene rubber, SIS is styrene-isoprene-styrene block copolymer, and 1901H is thermoplastic rubber SAMYH-1901H.

[0038] X1825 is soda lime, which can be purchased on the market (for example, Beijing Chongjing Ming Technology Co., Ltd.).

[0039] Wherein, the asphalt is 70# / 90# heavy asphalt 70#, Titan TM7686 is an asphalt modifier Titan TM 7686 (asphalt heat resistance modifier). The rubber oil is an organic aromatic oil.

[0040] Wherein, the tire rubber powder is 60 mesh.

[0041] Wherein, the heavy calcium is heavy calcium powder (200 mesh).

[0042] The modified asphalt waterproofing membrane coating material of the above raw material components is prepared by the following method:

[0043] Step 1: The heavy asphalt and rubber oil are weighed according to the above weight proportions and added to the reaction kettle, and heated with low speed stirring at a rate of 500 r / min.

[0044] Step 2: The temperature is raised to 150°C, and SBR, SBS, SIS and 1901H are slowly added to step 1 and stirred at a stirring rate of 1000 r / min, and medium speed stirring for 30-45 min.

[0045] Step 3: X1825 and tire rubber powder are added and stirred, and the temperature is raised to 180°C and kept for 3 h with high speed stirring at a stirring rate of 1300 r / min.

[0046] Step 4: The heavy calcium is added and stirred uniformly for 1 h, and the temperature is lowered to 175°C to obtain the wet-laid modified asphalt waterproofing membrane coating material.

[0047] Example 2

[0048] The present comparative example provides a modified asphalt waterproofing membrane coating material and a preparation method thereof, comprising the following raw material components:

[0049] Table 2 Raw material components of Example 2

[0050]

[0051] The above raw material components are selected as the same as in Example 1, and the preparation method is the same as in Example 1.

[0052] Example 3

[0053] The present comparative example provides a modified asphalt waterproofing membrane coating material and a preparation method thereof, comprising the following raw material components:

[0054] Table 3 Raw material components of Example 3

[0055]

[0056] The above raw material components are selected as the same as in Example 1, and the preparation method is the same as in Example 1.

[0057] Comparative Example 1

[0058] The present comparative example provides a modified asphalt waterproofing membrane coating material and a preparation method thereof, comprising the following raw material components:

[0059] Table 4 Raw material components of Comparative Example 1

[0060]

[0061] The selection of each of the above raw material components is the same as that of Example 1, and the preparation method is the same as that of Example 1.

[0062] Comparative Example 2

[0063] The present comparative example provides a modified asphalt waterproofing membrane coating material and a preparation method thereof, comprising the following raw material components:

[0064] Table 5 Raw material components of Comparative Example 2

[0065]

[0066] The selection of each of the above raw material components is the same as that of Example 1, and the preparation method is the same as that of Example 1.

[0067] Comparative Example 3

[0068] The present comparative example provides a modified asphalt waterproofing membrane coating material and a preparation method thereof, comprising the following raw material components:

[0069] Table 6 Raw material components of Comparative Example 3

[0070]

[0071] The selection of each of the above raw material components is the same as that of Example 1, and the preparation method is the same as that of Example 1.

[0072] Comparative Example 4

[0073] The present comparative example provides a modified asphalt waterproofing membrane coating material and a preparation method thereof, comprising the following raw material components:

[0074] Table 6 Raw material components of Comparative Example 3

[0075]

[0076] The selection of each of the above raw material components is the same as that of Example 1, and the preparation method is the same as that of Example 1.

[0077] Experimental Example 1

[0078] The present invention aims to detect the performance of the above examples and comparative examples, and the process is as follows:

[0079] The coating materials prepared from each of the examples and comparative examples were subjected to performance testing according to GB / T 35467-2017

[0080] The results are shown in the following table:

[0081] Table 8 Performance testing results of Examples 1-3

[0082]

[0083] It can be seen that, under a certain amount of addition, the addition of X1825 can significantly improve the bonding strength of the coating material (the higher the peel strength, the higher the adhesion). This may be due to the fact that NaOH / KOH in soda lime may react with silica (SiO2) or aluminate in cement to generate additional cementitious materials (such as sodium silicate gel), fill pores, enhance density, and form a more stable network structure.

[0084] Table 9 Performance testing results of Comparative Examples 1-4

[0085]

[0086] As can be seen from the results of Comparative Example 1 and Comparative Example 2 above, when excessive amounts of soda lime are added, the alkali (such as Na⁺, K⁺) in the soda lime may react with active aggregates (such as aggregates containing SiO2) over a long period of time to generate an expansive gel, resulting in cracking that needs to be controlled. When no soda lime is added, the cement peel performance is reduced, increasing the possibility of water channeling.

[0087] In addition, the present application replaces soda lime with slaked lime or separately adds NaOH, which does not significantly improve the bonding strength, and even compared with Comparative Document 2, the bonding strength decreases.

[0088] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing examples, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A modified bitumen composition for wet-laid waterproof membranes, characterized in that, include: Asphalt, modified components, functional additives, and fillers; The amount of asphalt used is 35-55% by weight. By weight, the modified components include: 1-10 parts of SBR, 1-10 parts of SBS, 1-5 parts of SIS, 1-5 parts of thermoplastic rubber SAMYH-1901H, and 1-5 parts of soda lime; The mass ratio of the asphalt, modified components, functional additives and fillers is (35~55):(5~33):(8~21):(20~30); by weight, the functional additives include: 5~10 parts of rubber oil and 3~10 parts of tire rubber powder.

2. The modified bitumen composition according to claim 1, characterized in that, The modified component further includes, by weight, 0.2 to 1 part of asphalt heat-resistant modifier.

3. The modified bitumen composition according to claim 1 or 2, characterized in that, The asphalt is heavy-duty asphalt.

4. The modified bitumen composition according to claim 1 or 2, characterized in that, The filler is heavy calcium carbonate.

5. The modified bitumen composition according to claim 3, characterized in that, The filler is heavy calcium carbonate.

6. A waterproof membrane coating material, characterized in that, Includes the modified bitumen composition according to any one of claims 1-5.

7. The method for preparing the waterproof membrane coating material according to claim 6, characterized in that, include: (1) Mix asphalt and rubber oil in a predetermined ratio, heat and stir until well mixed; (2) When the temperature rises to 130~180℃, add SBR, SBS, SIS and SAMYH-1901H and stir to mix well; (3) Add quicklime and tire rubber powder, heat to above 180°C and stir until well mixed; (4) Add the heavy calcium carbonate and stir to mix well, then cool to 170~175℃.

8. The preparation method according to claim 7, characterized in that, In step (1), the stirring rate is 400~600 r / min; In step (2), the stirring rate is 800~1200 r / min and the stirring time is 30~45 min; In step (3), the stirring rate is 1200~1500 r / min and the stirring time is 2.5~3 h.

9. A waterproof membrane, characterized in that, The waterproof membrane includes the waterproof membrane coating material as described in claim 6.

10. The use of the modified bitumen composition according to any one of claims 1-5, or the waterproof membrane coating according to claim 6, in the preparation of one or more of a sealing layer, adhesive layer, protective layer, or waterproof layer.

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