Pre-spraying anti-sticking waterproof construction method

Abstract

The application provides a pre-spraying anti-sticking waterproof construction method, which comprises the following steps: spraying pre-spraying anti-sticking sprayed rapid-setting rubber asphalt waterproof coating on the surface of a base layer to be constructed; naturally drying after the construction is completed; uniformly spreading fine sand on the surface of the pre-spraying anti-sticking sprayed rapid-setting rubber asphalt waterproof coating to form a fine sand layer; pouring a subsequent concrete structure after binding steel bars, so that the fine sand layer is naturally integrated with the concrete and becomes a part of the poured concrete, thereby preventing the steel bars from being bonded with the pre-spraying anti-sticking sprayed rapid-setting rubber asphalt waterproof coating and from damaging the pre-spraying anti-sticking sprayed rapid-setting rubber asphalt waterproof coating, preventing the waterproof layer from being damaged by the steel bars during the construction process, and effectively protecting the waterproof layer; the fine sand layer can also serve as a protective layer, reducing the surface temperature and surface aging degree of the waterproof layer formed by the pre-spraying anti-sticking sprayed rapid-setting rubber asphalt waterproof coating under long-time direct sunlight, and thereby improving the anti-sticking performance of the pre-spraying anti-sticking sprayed rapid-setting rubber asphalt waterproof coating.

Description

Technical Field

[0001] This invention relates to the field of waterproof material construction, specifically to a pre-sprayed reverse-adhesive waterproof construction method. Background Technology

[0002] In the construction of building structures such as the foundation slab, tunnel inverts, and underground building sidewalls where external waterproofing cannot be applied due to limited working space, the use of pre-sprayed reverse-adhesive waterproofing coatings as the pre-sprayed reverse-adhesive coating is problematic. Due to the inherent adhesiveness and easy aging of the quick-setting waterproofing coating itself, the reinforcing bars tend to adhere to it during subsequent reinforcement binding, potentially damaging or even puncturing the coating, thus compromising its integrity and waterproofing performance. Furthermore, the pre-sprayed reverse-adhesive coating is prone to aging under direct sunlight after application, further reducing its reverse-adhesive properties. Summary of the Invention

[0003] The purpose of this invention is to provide a pre-sprayed reverse-adhesion waterproof construction method, which can not only prevent the steel bars from damaging or penetrating the coating, but also reduce the surface temperature and surface aging of the coating under prolonged direct sunlight, thereby improving its reverse-adhesion performance.

[0004] To achieve the above objectives, this application provides a pre-sprayed reverse-adhesive waterproofing construction method, which includes the following steps:

[0005] S1. Apply pre-sprayed reverse-adhesive sprayed quick-setting rubber asphalt waterproof coating to the base surface to be constructed;

[0006] S2. The pre-sprayed reverse-adhesive sprayed quick-setting rubber asphalt waterproof coating shall be allowed to dry naturally after construction. The curing time is 6-24 hours depending on the ambient temperature.

[0007] S3. Sprinkle fine sand evenly onto the surface of the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating to form a fine sand layer. This is to prevent the surface of the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating from aging and reducing its reverse-adhesive performance under direct sunlight.

[0008] S4. After tying the reinforcing bars, pour the subsequent concrete structure so that the fine sand layer naturally integrates with the concrete and becomes part of the later-poured concrete. This prevents the reinforcing bars from adhering to the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating and prevents the reinforcing bars from damaging the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating.

[0009] Furthermore, in step S3,

[0010] If there is a long interval between the application of the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating, first apply water-based adhesive to the surface of the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating, and then sprinkle fine sand onto the surface of the material.

[0011] Furthermore, the fine sand particle size ranges from 0.1 mm to 1 mm.

[0012] Furthermore, the pre-sprayed reverse-adhesive sprayed quick-setting rubber asphalt waterproof coating comprises the following components in parts by weight:

[0013]

[0014] Furthermore, the pre-sprayed reverse-adhesive sprayed quick-setting rubber asphalt waterproof coating comprises the following components in parts by weight:

[0015]

[0016]

[0017] Furthermore, the latex includes one or more of chloroprene rubber latex, styrene-butadiene rubber latex, natural latex, acrylic latex, nitrile latex, or butyl latex.

[0018] Furthermore, the polymer-modified anionic emulsified asphalt includes one or more of SBS, styrene-butadiene rubber, and petroleum resin.

[0019] Furthermore, the defoamer is an organosilicon-based defoamer.

[0020] Furthermore, the coupling agent includes one or more of titanate coupling agents, silane coupling agents, borate coupling agents, and aluminate coupling agents;

[0021] The solvent oil includes one or more of naphthenic oil, aromatic oil, and environmentally friendly oil;

[0022] The stabilizer includes one or more of rosin soap, fatty acid soap, alkyl diphenyl ether disulfonate, nonylphenol ethoxylate, and sulfated methyl oleate sodium glutamate.

[0023] Furthermore, the application scenarios of the construction method include: building structure base slabs, tunnel inverts, and underground building sidewalls where external waterproofing and coating cannot be carried out due to limited working space, using pre-sprayed reverse adhesive waterproofing construction.

[0024] By adopting the above technical solution, the pre-sprayed reverse-adhesive waterproofing construction method provided in this application has the following technical advantages compared with the prior art:

[0025] The method includes: spraying a pre-sprayed, reverse-adhesive, quick-setting rubber asphalt waterproof coating onto the substrate surface to be constructed; allowing the pre-sprayed, reverse-adhesive, quick-setting rubber asphalt waterproof coating to dry naturally after construction, with a curing time of 6-24 hours depending on the ambient temperature; evenly spreading fine sand onto the surface of the pre-sprayed, reverse-adhesive, quick-setting rubber asphalt waterproof coating to form a fine sand layer; tying reinforcing bars and then pouring the subsequent concrete structure, allowing the fine sand layer to naturally integrate with the concrete, becoming part of the subsequently poured concrete, thus preventing the reinforcing bars from adhering to the pre-sprayed, reverse-adhesive, quick-setting rubber asphalt waterproof coating, preventing damage to the pre-sprayed, reverse-adhesive, quick-setting rubber asphalt waterproof coating, and effectively protecting the waterproof layer by crushing or puncturing the pre-sprayed, reverse-adhesive, quick-setting rubber asphalt waterproof coating.

[0026] In this solution, after the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating has dried, a layer of fine sand can be spread on the surface to form a fine sand layer. The fine sand has better compatibility with the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating. When pouring concrete, the fine sand layer will integrate with the concrete and become part of the concrete, without affecting the adhesion performance between the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating and the concrete. The fine sand can isolate the tied reinforcing bars from contact with the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating, preventing the reinforcing bars from adhering to the waterproof layer formed by the coating, thus preventing the reinforcing bars from damaging or puncturing the waterproof layer and effectively protecting it. The fine sand layer can also serve as an isolation layer, reducing the surface temperature and aging of the waterproof layer formed by the coating under prolonged direct sunlight, thereby improving its reverse-adhesive performance. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 A flowchart of the pre-sprayed reverse-adhesive waterproofing construction method provided in this application;

[0029] Figure 2 Construction structure diagram for applying the pre-sprayed reverse-adhesion waterproof construction method provided in this application to the initial lining surface of a tunnel structure;

[0030] Figure 3 The pre-sprayed reverse-adhesive waterproofing construction method provided in this application is applied to the construction structure diagram of the building structure base slab.

[0031] illustrate:

[0032] 1-Concrete support layer; 2-Polymer sheet; 3, 7-Waterproof layer; 4-Concrete secondary lining; 5, 8-Fine sand layer; 6-Base layer; 9-Reinforced concrete structural layer. Detailed Implementation

[0033] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] This application provides a pre-sprayed reverse-adhesive waterproofing construction method. The main application scenarios of this construction method include: building structure base slabs, tunnel invert arches, and underground building side walls that cannot be coated with external waterproofing due to limited working space.

[0035] like Figure 1 As shown, specifically, the construction method includes the following steps:

[0036] S1. Apply pre-sprayed reverse-adhesive sprayed quick-setting rubber asphalt waterproof coating to the base surface to be constructed;

[0037] S2. After the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating is applied, it should be allowed to dry naturally. The curing time is 6-24 hours depending on the ambient temperature. This pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating is used as a waterproof layer.

[0038] S3. Sprinkle fine sand evenly onto the surface of the pre-sprayed reverse-adhesion quick-setting rubber asphalt waterproof coating to form a fine sand layer; this is to prevent the surface of the pre-sprayed reverse-adhesion quick-setting rubber asphalt waterproof coating from aging and reducing its reverse-adhesion performance under direct sunlight.

[0039] S4. After tying the reinforcing bars, pour the subsequent concrete structure so that the fine sand layer naturally integrates with the concrete and becomes part of the later-poured concrete. This prevents the reinforcing bars from sticking to the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating, thereby preventing the reinforcing bars from damaging the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating.

[0040] As a preferred implementation scheme, in step S3:

[0041] When laying the fine sand layer:

[0042] If there is a long interval between the application of the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating, first apply a layer of water-based pressure-sensitive adhesive or other water-based adhesive to the surface of the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating, and then sprinkle fine sand onto the surface of the material.

[0043] As a preferred implementation method, the fine sand can be ordinary river sand, standard sand, quartz sand, etc., with a particle size range of 0.1mm-1mm.

[0044] As a preferred implementation scheme, the pre-sprayed reverse-adhesive sprayed quick-setting rubber asphalt waterproof coating in this embodiment comprises the following components in parts by weight:

[0045] The mixture contains 30-70 parts polymer-modified anionic emulsified asphalt, 10-80 parts latex, 0.5-1.5 parts defoamer, 1-3 parts stabilizer, 1-3 parts coupling agent, and 1-3 parts solvent oil.

[0046] As a preferred implementation method, the pre-sprayed reverse-adhesive sprayed quick-setting rubber asphalt waterproof coating includes the following components in parts by weight: 30 parts polymer-modified anionic emulsified asphalt, 10 parts latex, 0.5 parts defoamer, 1 part stabilizer, 1 part coupling agent, and 1 part solvent oil.

[0047] As a preferred implementation method, the pre-sprayed reverse-adhesive sprayed quick-setting rubber asphalt waterproof coating comprises the following components in parts by weight: 60 parts polymer-modified anionic emulsified asphalt, 35 parts latex, 0.5 parts defoamer, 1.2 parts stabilizer, 2 parts coupling agent, and 1.5 parts solvent oil.

[0048] As a preferred implementation method, the pre-sprayed reverse-adhesive sprayed quick-setting rubber asphalt waterproof coating includes the following components in parts by weight: 70 parts polymer-modified anionic emulsified asphalt, 80 parts latex, 1.5 parts defoamer, 3 parts stabilizer, 3 parts coupling agent, and 3 parts solvent oil.

[0049] Preferably, the latex in this embodiment includes one or more of chloroprene rubber latex, styrene-butadiene rubber latex, natural latex, acrylic latex, nitrile latex, or butyl latex.

[0050] Preferably, the polymer-modified anionic emulsified asphalt in this embodiment includes one or more of SBS, styrene-butadiene rubber, and petroleum resin.

[0051] Preferably, the defoamer in this embodiment is an organosilicon defoamer.

[0052] The coupling agent in this embodiment includes one or more of titanate coupling agents, silane coupling agents, borate coupling agents, and aluminate coupling agents; preferably, a silane coupling agent can be used to enhance the bonding strength between the rubber asphalt coating and the subsequently added fine sand layer, thereby enhancing the anti-adhesion performance with the subsequently poured concrete.

[0053] Preferably, the solvent oil in this embodiment includes one or more of naphthenic oil, aromatic oil, and environmentally friendly oil; its function is to enhance the adhesion between the coating and the fine sand.

[0054] Preferably, the stabilizer in this embodiment includes one or more of rosin soap, fatty acid soap, alkyl diphenyl ether disulfonate, nonylphenol ethoxylate, and sulfated methyl oleate sodium glutamate.

[0055] The following describes the preparation method of the pre-sprayed reverse-adhesive sprayed quick-setting rubber asphalt waterproof coating in this embodiment:

[0056] A specially formulated pre-sprayed, reverse-adhesive, quick-setting rubber asphalt waterproof coating is prepared by mixing polymer-modified emulsified asphalt, chloroprene rubber latex, defoamer, stabilizer, silane coupling agent, and solvent oil evenly.

[0057] The following describes a comparative test conducted using the pre-sprayed reverse-adhesive waterproofing construction method of this embodiment:

[0058] As shown in the table below, the first group consists of a layer of fine sand added to the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating and then exposed to direct sunlight for 7 days. The second group consists of a pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating exposed to direct sunlight for 7 days, then concrete was poured on the surface, and after curing, a peel test was conducted and the test results were recorded.

[0059]

[0060] As can be seen from the table above, for the two groups of specimens with the same pre-sprayed anti-adhesion sprayed quick-setting rubber asphalt waterproof coating applied to the base surface, the first group of specimens had a peel strength ≥2.0 N / mm, indicating improved anti-adhesion performance and meeting the requirements of GB / T 23457; the second group of specimens had a peel strength <1.0 N / mm, indicating decreased anti-adhesion performance.

[0061] Figure 2 The following diagram illustrates the construction structure of the construction method implemented in this application applied to the initial lining surface of a tunnel structure. Figure 2 As shown, the shotcrete support layer 1 is the tunnel structure cushion layer (initial lining). After the pouring is completed, polymer sheet 2 is fixed on the formed arc-shaped initial lining. The lap joints are welded, glued, or directly overlapped. Then, a pre-sprayed reverse-adhesive sprayed quick-setting rubber asphalt waterproof coating is sprayed according to the specified thickness to form a waterproof layer 3.

[0062] In the existing technology, after the spraying is completed, the steel bars are directly tied and the concrete structural layer is poured to form the concrete secondary lining 4. Due to the adhesiveness of the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating and the easy aging characteristics of the surface layer, the steel bars are easy to stick to the waterproof material in the subsequent steel bar tying process, which can easily crush and penetrate the waterproof layer, destroying the integrity and waterproof performance of the waterproof layer. In addition, the surface of the waterproof layer after spraying is easily aged under direct sunlight, thereby reducing its reverse-adhesive performance.

[0063] Therefore, in this solution, a layer of fine sand is laid on the surface of the waterproof layer 3 formed by the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating to form a fine sand layer 5. Then, the reinforcing bars are tied and the subsequent concrete structural layer is poured, so that the fine sand layer naturally integrates with the concrete and becomes part of the later-poured concrete, forming a concrete secondary lining 4. This prevents the reinforcing bars from adhering to the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating and prevents the reinforcing bars from damaging the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating.

[0064] Figure 3 The following is a construction structural diagram showing the application of the construction method of this application to the foundation slab of a building structure, as shown in the diagram. Figure 3 As shown, the building structure base plate includes, from bottom to top, a base layer 6, a waterproof layer 7 formed by pre-sprayed reverse-adhesive sprayed quick-setting rubber asphalt waterproof coating, a fine sand layer 8, and a reinforced concrete structural layer 9.

[0065] Specifically, during construction, a waterproof layer 7 is first formed by spraying a pre-sprayed reverse-adhesive sprayed quick-setting rubber asphalt waterproof coating on the base layer 6. Then, a layer of fine sand is laid on the waterproof layer 7 to form a fine sand layer 8. Finally, steel bars are tied on the fine sand layer 8 and concrete is poured to form a reinforced concrete structure layer 9.

[0066] After construction, the fine sand layer 8 naturally integrates with the reinforced concrete structure layer 9, becoming part of the post-poured concrete. This prevents the reinforcing bars from adhering to the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating, and at the same time, prevents the reinforcing bars from damaging or puncturing the waterproof layer 7, effectively protecting the waterproof layer 7. The fine sand layer 8 can also serve as a protective layer, reducing the surface temperature and surface aging of the waterproof layer 7 formed by the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating under prolonged direct sunlight, thereby improving its reverse-adhesive performance.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pre-sprayed reverse-adhesive waterproofing construction method, characterized in that, The construction method includes the following steps: S1. Apply pre-sprayed reverse-adhesive sprayed quick-setting rubber asphalt waterproof coating to the base surface to be constructed; S2. The pre-sprayed reverse-adhesive sprayed quick-setting rubber asphalt waterproof coating shall be allowed to dry naturally after construction. The curing time is 6-24 hours depending on the ambient temperature. S3. Sprinkle fine sand evenly onto the surface of the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating to form a fine sand layer. This is to prevent the surface of the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating from aging and reducing its reverse-adhesive performance under direct sunlight. S4. After tying the reinforcing bars, pour the subsequent concrete structure so that the fine sand layer naturally integrates with the concrete and becomes part of the later-poured concrete. This prevents the reinforcing bars from adhering to the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating, thereby preventing the reinforcing bars from damaging the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating.

2. The construction method according to claim 1, characterized in that, In step S3, If there is a long interval between the application of the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating, first apply water-based adhesive to the surface of the pre-sprayed reverse-adhesive quick-setting rubber asphalt waterproof coating, and then sprinkle fine sand onto the surface of the material.

3. The construction method according to claim 1, characterized in that, The fine sand has a particle size range of 0.1 mm to 1 mm.

4. The construction method according to claim 1, characterized in that, The pre-sprayed reverse-adhesive sprayed quick-setting rubber asphalt waterproof coating comprises the following components in parts by weight: 30-70 parts of polymer-modified anionic emulsified asphalt. 10-80 parts latex Defoamer 0.5-1.5 parts, Stabilizer 1-3 parts, 1-3 parts coupling agent Solvent oil 1-3 parts.

5. The construction method according to claim 4, characterized in that, The pre-sprayed reverse-adhesive sprayed quick-setting rubber asphalt waterproof coating comprises the following components in parts by weight: 60 parts of polymer-modified anionic emulsified asphalt. 35 parts latex 0.5 parts of defoamer Stabilizer 1.2 parts, Two parts of coupling agent, 1.5 parts solvent oil.

6. The construction method according to claim 4, characterized in that, The latex includes one or more of chloroprene rubber latex, styrene-butadiene rubber latex, natural latex, acrylic latex, nitrile latex, or butyl latex.

7. The construction method according to claim 4, characterized in that, The polymer-modified anionic emulsified asphalt includes one or more of SBS, styrene-butadiene rubber, and petroleum resin.

8. The construction method according to claim 4, characterized in that, The defoamer is an organosilicon-based defoamer.

9. The construction method according to claim 4, characterized in that, The coupling agent includes one or more of titanate coupling agents, silane coupling agents, borate coupling agents, and aluminate coupling agents; The solvent oil includes one or more of naphthenic oil, aromatic oil, and environmentally friendly oil; The stabilizer includes one or more of rosin soap, fatty acid soap, alkyl diphenyl ether disulfonate, nonylphenol ethoxylate, and sulfated methyl oleate sodium glutamate.

10. The construction method according to claim 1, characterized in that, The application scenarios of the construction method include: building structure base slabs, tunnel inverts, and underground building side walls where external waterproofing and coating cannot be carried out due to limited working space, using pre-sprayed reverse adhesive waterproofing construction.

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