CN112852227A - High-molecular polymer spraying material for tunnel waterproofing and preparation and application methods thereof - Google Patents
High-molecular polymer spraying material for tunnel waterproofing and preparation and application methods thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/04—Homopolymers or copolymers of ethene
- C09D123/08—Copolymers of ethene
- C09D123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09D123/0853—Vinylacetate
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- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/47—Levelling agents
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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Abstract
The invention belongs to the technical field of waterproof coatings, and particularly relates to a high-molecular polymer spraying material for tunnel waterproofing and a preparation method and an application method thereof. The high molecular polymer spraying material comprises the following components in percentage by mass: 30-40% of EVA rubber powder, 30-40% of acrylate rubber powder, 10-20% of Portland cement, 10-20% of quartz sand and 1-5% of hydroxypropyl methyl cellulose. The spraying material provided by the invention takes high-molecular polymer EVA rubber powder and acrylate rubber powder as main components, improves the binding force with the wall surface of a tunnel by matching with portland cement, increases the specific gravity by adding quartz sand, and improves the rheological property by adding hydroxypropyl methyl cellulose. The obtained spray coating material can be directly sprayed by a dry spray pump, is convenient to use and has high waterproof performance.
Description
Technical Field
The invention belongs to the technical field of waterproof coatings, and particularly relates to a high-molecular polymer spraying material for tunnel waterproofing and a preparation method and an application method thereof.
Background
In the present waterproof construction of building engineering, high polymer modified asphalt waterproof coiled materials and synthetic polymer waterproof coiled materials are commonly used. Years of construction prove that the waterproof coiled material is mature and reliable in technology, low in price and convenient and fast to construct. The waterproof roll has the advantages that: the construction is convenient, the construction period is short, the maintenance is not needed after the forming, the influence of air temperature is small, the environmental pollution is small, the layer thickness is easy to master according to the design requirement, the material calculation is accurate, the field management of the construction is convenient, the material is not easy to be reduced by thieves, the layer thickness is uniform, and the stress of the base layer can be effectively overcome when the base layer is laid in an empty state (the whole waterproof layer can be kept when a large crack occurs on the base layer). However, there are many problems in actual construction: 1. the requirements on a waterproof base surface are strict, the construction must be carried out on a base surface which is completely flat and smooth and has the water content of less than 9 percent, otherwise, the conditions of layering, bulging and water channeling appear; 2. the binding degree with a cement base surface is poor, the part with wet base surface and large base surface osmotic pressure is easy to delaminate and fall off, and particularly the difficulty in construction of a vertical surface (wall surface) is large, so that the coiled material is easy to fall off integrally; 3. the formed waterproof layer is thin in thickness and weak in strength, and can be prevented from puncture damage and influence of ultraviolet rays only by being made into mortar and concrete protective layers during construction, and cannot resist corrosion of acid, alkali, chlorine and other corrosive substances in water, so that premature leakage is caused; 4. the durability is short, after construction, various performances are gradually attenuated, aged and decomposed, the leakage condition occurs, and the maintenance and the replacement are carried out every 3 to 5 years, and the material belongs to a periodic material; 5. the fire-resistant cable is easy to burn, is ignited by welders on construction sites, and causes fire; contains toxic volatile gas, and can volatilize harmful carcinogens such as benzene and xylene for a long time during or after construction. 6. The plasticity is poor, the waterproof part with variable anisotropy or narrow is difficult to process, and gaps and weak points are easy to remain; the waterproof coiled materials need to be spliced in a plurality of pieces for a base layer with a complex appearance in waterproof construction, the bonding difficulty of the mutual lap joints of the waterproof coiled materials is high, and the lap joints of the coiled materials are the positions with the largest hidden water leakage danger and the largest chance; 7. the high-grade waterproof coiled material has the durability of decades, but the domestic adhesive which is matched with the high-grade waterproof coiled material is few at present, the adhesive function is usually lost in advance due to factors such as environment, adhesive materials and the like, and the waterproof failure caused by the adhesive function is self-evident; 8. the waterproof layer is arranged between the waterproof coiled material and the base layer no matter whether the waterproof coiled material is fully paved, point paved, strip paved or empty paved, the waterproof function of the whole layer connected with the waterproof layer is totally lost no matter whether any part is penetrated and damaged, and the waterproof layer is completely repaired if no damaged or defective part can be found, and only the waterproof layer is reworked. 9. The eaves gutter and other parts are not suitable for being made with protective layers, and the possibility of long-term water accumulation is increased due to sewer blockage and other reasons, so that the chances of successful water prevention of the coiled materials at the eaves gutter part are less; the eave groove has complex shape, the sealing difficulty of the water passing hole, the water outlet and other parts is higher, and harmful components in the eave groove accelerate the decomposition, aging and even failure of the coiled material bonding material due to the accumulation of domestic and production wastewater in the groove. With the development of technology, aiming at the defects of waterproof coiled materials, novel waterproof coatings appear in recent years.
Patent CN 105731923 a discloses an elastic cement-based permeable crystallization type waterproof coating. The composition comprises the following components in parts by weight: 1 part of Portland cement, 0.7-0.9 part of cement-based permeable crystalline waterproof liquid, 0.15-0.18 part of rubber powder and 1-1.3 parts of water are taken as raw materials to prepare the cement-based permeable crystalline waterproof glue; the invention can form a compact impervious zone cement crystal layer on the building concrete in the coating layer, is compact and hard, has high strength, can resist certain elastic deformation, and forms a waterproof impervious layer with good waterproofness and good flexibility.
Patent CN107311533A discloses a waterproof high-molecular beneficial daub with high bonding strength and a preparation method thereof. Comprises the following raw materials: 40-53% of gray cement, 45-58% of quartz sand, 0.04-0.06% of hydroxypropyl methyl cellulose ether, 0.1-0.12% of starch ether, 0.02-0.04% of polypropylene fiber, 0.1-0.12% of styrene-butadiene latex powder, 0.72-0.82% of acrylic latex powder, 0.4-0.54% of calcium formate, 0.1-0.16% of water repellent, 0.05-0.09% of powder defoaming agent and 0.005-0.06% of powder water reducing agent; the polymer beneficial daub has higher bonding strength and better mechanical property while improving the impermeability and the waterproof property.
Although the waterproof coating can achieve a good waterproof effect, the product is generally in a liquid form or the main component of the product is an inorganic component, so that the product is high in storage and transportation cost and limited in waterproof performance.
Disclosure of Invention
Aiming at the defects and shortcomings of the prior art, the invention mainly aims to provide a high-molecular polymer spraying material for tunnel waterproofing. The spraying material provided by the invention takes high-molecular polymer EVA rubber powder and acrylate rubber powder as main components, improves the binding force with the wall surface of a tunnel by matching with portland cement, increases the specific gravity by adding quartz sand, and improves the rheological property by adding hydroxypropyl methyl cellulose. The obtained spray coating material can be directly sprayed by a dry spray pump, is convenient to use and has high waterproof performance.
The invention also aims to provide a preparation method of the high molecular polymer spray material for tunnel waterproofing.
The invention also aims to provide an application method of the high molecular polymer spray material for tunnel waterproofing.
The purpose of the invention is realized by the following technical scheme:
a high molecular polymer spray material for tunnel waterproofing comprises the following components in percentage by mass:
further preferably, the high molecular polymer spray material comprises the following components in percentage by mass:
further, the EVA rubber powder is prepared by the following method:
(1) dissolving polyvinyl alcohol powder in water to prepare a polyvinyl alcohol aqueous solution with the solid content of 10-30 percent as a protective colloid;
(2) fully stirring and mixing the protective colloid obtained in the step (1) and the EVA emulsion, then adding an anti-caking agent, stirring and mixing uniformly to prepare a spray solution with the solid content of 30-60%;
(3) and (3) carrying out spray drying on the spray liquid obtained in the step (2) to obtain the EVA rubber powder.
Further, the acrylate rubber powder is prepared by the following method:
1) dissolving polyvinyl alcohol powder in water to prepare a polyvinyl alcohol aqueous solution with the solid content of 10-30 percent as a protective colloid;
2) fully stirring and mixing the protective colloid obtained in the step 1) and the acrylate emulsion, then adding an anti-caking agent, stirring and mixing uniformly to prepare a spray solution with the solid content of 30-60%;
3) and (3) carrying out spray drying on the spray liquid obtained in the step 2) to obtain the acrylate rubber powder.
Further, in the preparation process of the EVA rubber powder and the acrylate rubber powder, the polymerization degree of the polyvinyl alcohol is 200-1200, and the alcoholysis degree is 80-100%.
Further, in the preparation process of the EVA rubber powder and the acrylate rubber powder, the anti-caking agent is at least one of fumed silica, wollastonite powder, heavy calcium powder, kaolin and talcum powder.
The preparation method of the high molecular polymer spray material for tunnel waterproofing comprises the following preparation steps:
and uniformly stirring and mixing the EVA rubber powder, the acrylate rubber powder, the silicate cement, the quartz sand and the hydroxypropyl methyl cellulose to obtain the high polymer spraying material for tunnel waterproofing.
The application method of the high molecular polymer spray material for tunnel waterproofing comprises the following steps:
after the tunnel wall surface is cleaned to remove dirt, the high molecular polymer spraying material and water are sprayed on the tunnel wall surface through a dry spraying pump, the water is mixed and added at a nozzle sprayed by the dry spraying pump, and the waterproof coating is obtained after drying and curing.
Compared with the prior art, the invention has the beneficial effects that:
the spraying material provided by the invention takes high-molecular polymer EVA rubber powder and acrylate rubber powder as main components, improves the binding force with the wall surface of a tunnel by matching with portland cement, increases the specific gravity by adding quartz sand, and improves the rheological property by adding hydroxypropyl methyl cellulose. The obtained spray coating material can be directly sprayed by a dry spray pump, is convenient to use and has high waterproof performance.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1
The high molecular polymer spray material for tunnel waterproofing of the embodiment comprises the following components in percentage by mass:
and uniformly stirring and mixing the EVA rubber powder, the acrylate rubber powder, the silicate cement, the quartz sand and the hydroxypropyl methyl cellulose in percentage by mass to obtain the high polymer spraying material for tunnel waterproofing.
The EVA rubber powder is prepared by the following method:
(1) dissolving polyvinyl alcohol (polymerization degree is 600, alcoholysis degree is 90%) powder in water to prepare a polyvinyl alcohol aqueous solution with solid content of 10% as a protective colloid;
(2) fully stirring and mixing the protective colloid obtained in the step (1) and EVA emulsion, then adding the anti-caking agent fumed silica, stirring and mixing uniformly to prepare spray liquid with the solid content of 30%;
(3) and (3) carrying out spray drying on the spray liquid obtained in the step (2) to obtain the EVA rubber powder.
The acrylate rubber powder is prepared by the following method:
1) dissolving polyvinyl alcohol powder (with polymerization degree of 600 and alcoholysis degree of 90%) in water to prepare a polyvinyl alcohol aqueous solution with solid content of 10%, wherein the polyvinyl alcohol aqueous solution is used as a protective colloid;
2) fully stirring and mixing the protective colloid obtained in the step 1) and the acrylate emulsion, and then adding the anti-caking agent fumed silica, stirring and mixing uniformly to prepare spray liquid with the solid content of 30%;
3) and (3) carrying out spray drying on the spray liquid obtained in the step 2) to obtain the acrylate rubber powder.
Example 2
The high molecular polymer spray material for tunnel waterproofing of the embodiment comprises the following components in percentage by mass:
and uniformly stirring and mixing the EVA rubber powder, the acrylate rubber powder, the silicate cement, the quartz sand and the hydroxypropyl methyl cellulose in percentage by mass to obtain the high polymer spraying material for tunnel waterproofing.
The EVA rubber powder is prepared by the following method:
(1) dissolving polyvinyl alcohol (polymerization degree is 600, alcoholysis degree is 90%) powder in water to prepare a polyvinyl alcohol aqueous solution with solid content of 20% as a protective colloid;
(2) fully stirring and mixing the protective colloid obtained in the step (1) and the EVA emulsion, adding the wollastonite powder serving as an anti-caking agent, and stirring and mixing uniformly to prepare spray liquid with the solid content of 45%;
(3) and (3) carrying out spray drying on the spray liquid obtained in the step (2) to obtain the EVA rubber powder.
The acrylate rubber powder is prepared by the following method:
1) dissolving polyvinyl alcohol powder (with polymerization degree of 600 and alcoholysis degree of 90%) in water to prepare a polyvinyl alcohol aqueous solution with solid content of 20% as a protective colloid;
2) fully stirring and mixing the protective colloid obtained in the step 1) and the acrylate emulsion, adding the wollastonite powder serving as an anti-caking agent, and stirring and mixing uniformly to prepare spray liquid with the solid content of 45%;
3) and (3) carrying out spray drying on the spray liquid obtained in the step 2) to obtain the acrylate rubber powder.
Example 3
The high molecular polymer spray material for tunnel waterproofing of the embodiment comprises the following components in percentage by mass:
and uniformly stirring and mixing the EVA rubber powder, the acrylate rubber powder, the silicate cement, the quartz sand and the hydroxypropyl methyl cellulose in percentage by mass to obtain the high polymer spraying material for tunnel waterproofing.
The EVA rubber powder is prepared by the following method:
(1) dissolving polyvinyl alcohol (polymerization degree is 600, alcoholysis degree is 90%) powder in water to prepare a polyvinyl alcohol aqueous solution with solid content of 30% as a protective colloid;
(2) fully stirring and mixing the protective colloid obtained in the step (1) and EVA emulsion, adding an anti-caking agent talcum powder, stirring and mixing uniformly to prepare spray liquid with solid content of 60%;
(3) and (3) carrying out spray drying on the spray liquid obtained in the step (2) to obtain the EVA rubber powder.
The acrylate rubber powder is prepared by the following method:
1) dissolving polyvinyl alcohol powder (with polymerization degree of 600 and alcoholysis degree of 90%) in water to prepare a polyvinyl alcohol aqueous solution with solid content of 30% as a protective colloid;
2) fully stirring and mixing the protective colloid obtained in the step 1) and the acrylate emulsion, adding an anti-caking agent talcum powder, stirring and mixing uniformly to prepare spray liquid with solid content of 60%;
3) and (3) carrying out spray drying on the spray liquid obtained in the step 2) to obtain the acrylate rubber powder.
Example 4
The high molecular polymer spray material for tunnel waterproofing of the embodiment comprises the following components in percentage by mass:
and uniformly stirring and mixing the EVA rubber powder, the acrylate rubber powder, the silicate cement, the quartz sand and the hydroxypropyl methyl cellulose in percentage by mass to obtain the high polymer spraying material for tunnel waterproofing.
The EVA rubber powder is prepared by the following method:
(1) dissolving polyvinyl alcohol (polymerization degree is 600, alcoholysis degree is 90%) powder in water to prepare a polyvinyl alcohol aqueous solution with solid content of 20% as a protective colloid;
(2) fully stirring and mixing the protective colloid obtained in the step (1) and EVA emulsion, then adding the anti-caking agent fumed silica, stirring and mixing uniformly to prepare spray liquid with the solid content of 40%;
(3) and (3) carrying out spray drying on the spray liquid obtained in the step (2) to obtain the EVA rubber powder.
The acrylate rubber powder is prepared by the following method:
1) dissolving polyvinyl alcohol powder (with polymerization degree of 600 and alcoholysis degree of 90%) in water to prepare a polyvinyl alcohol aqueous solution with solid content of 20% as a protective colloid;
2) fully stirring and mixing the protective colloid obtained in the step 1) and the acrylate emulsion, and then adding the anti-caking agent fumed silica, stirring and mixing uniformly to prepare spray liquid with the solid content of 40%;
3) and (3) carrying out spray drying on the spray liquid obtained in the step 2) to obtain the acrylate rubber powder.
The application performance test of the high molecular polymer spray coating material obtained in the above example was carried out: after the surface of the tested concrete is cleaned to remove dirt, a high molecular polymer spraying material and water are sprayed on the surface through a dry spraying pump, the water is mixed and added at a nozzle sprayed by the dry spraying pump, and the waterproof coating is obtained after drying and curing. The relevant performance was tested according to GB/T23445-2009 Polymer Cement waterproofing paint, and the test results are shown in Table 1 below.
TABLE 1
The results in table 1 show that the high molecular polymer spray coating material obtained by the invention has good waterproof performance and mechanical property, is convenient to use and construct, can be used for both dry base planes and wet base planes, and can be suitable for tunnel waterproof treatment.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (8)
1. The high molecular polymer spray material for tunnel waterproofing is characterized by comprising the following components in percentage by mass:
2. the high molecular polymer spray material for tunnel waterproofing according to claim 1, characterized in that: the high molecular polymer spraying material comprises the following components in percentage by mass:
3. the high molecular polymer spray material for tunnel waterproofing according to claim 1 or 2, characterized in that: the EVA rubber powder is prepared by the following method:
(1) dissolving polyvinyl alcohol powder in water to prepare a polyvinyl alcohol aqueous solution with the solid content of 10-30 percent as a protective colloid;
(2) fully stirring and mixing the protective colloid obtained in the step (1) and the EVA emulsion, then adding an anti-caking agent, stirring and mixing uniformly to prepare a spray solution with the solid content of 30-60%;
(3) and (3) carrying out spray drying on the spray liquid obtained in the step (2) to obtain the EVA rubber powder.
4. The high molecular polymer spray material for tunnel waterproofing according to claim 1 or 2, characterized in that: the acrylate rubber powder is prepared by the following method:
1) dissolving polyvinyl alcohol powder in water to prepare a polyvinyl alcohol aqueous solution with the solid content of 10-30 percent as a protective colloid;
2) fully stirring and mixing the protective colloid obtained in the step 1) and the acrylate emulsion, then adding an anti-caking agent, stirring and mixing uniformly to prepare a spray solution with the solid content of 30-60%;
3) and (3) carrying out spray drying on the spray liquid obtained in the step 2) to obtain the acrylate rubber powder.
5. The high molecular polymer spray material for tunnel waterproofing according to claim 3 or 4, characterized in that: the polymerization degree of the polyvinyl alcohol is 200-1200, and the alcoholysis degree is 80-100%.
6. The high molecular polymer spray material for tunnel waterproofing according to claim 3 or 4, characterized in that: the anti-caking agent is at least one of fumed silica, wollastonite powder, heavy calcium powder, kaolin and talcum powder.
7. The preparation method of the high molecular polymer spray material for tunnel waterproofing according to any one of claims 1 to 6, characterized by comprising the following preparation steps:
and uniformly stirring and mixing the EVA rubber powder, the acrylate rubber powder, the silicate cement, the quartz sand and the hydroxypropyl methyl cellulose to obtain the high polymer spraying material for tunnel waterproofing.
8. The method for applying the high molecular polymer spray material for tunnel waterproofing according to claim 7, characterized by comprising the steps of:
after the tunnel wall surface is cleaned to remove dirt, the high molecular polymer spraying material and water are sprayed on the tunnel wall surface through a dry spraying pump, the water is mixed and added at a nozzle sprayed by the dry spraying pump, and the waterproof coating is obtained after drying and curing.
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| CN116425475A (en) * | 2022-01-04 | 2023-07-14 | 江苏凯伦建材股份有限公司 | Single-component polymer cement waterproof paint, preparation method and construction method thereof |
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Application publication date: 20210528 |