CN113528058A - Desulfurized gypsum powder-based pavement water-based crack pouring adhesive and preparation method thereof - Google Patents
Desulfurized gypsum powder-based pavement water-based crack pouring adhesive and preparation method thereof Download PDFInfo
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- CN113528058A CN113528058A CN202110665705.5A CN202110665705A CN113528058A CN 113528058 A CN113528058 A CN 113528058A CN 202110665705 A CN202110665705 A CN 202110665705A CN 113528058 A CN113528058 A CN 113528058A
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J109/00—Adhesives based on homopolymers or copolymers of conjugated diene hydrocarbons
- C09J109/06—Copolymers with styrene
- C09J109/08—Latex
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J153/02—Vinyl aromatic monomers and conjugated dienes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention relates to a desulfurized gypsum powder-based pavement water-based crack pouring adhesive which is prepared from a raw material comprising a component A, a component B, a component C, a component D and a component E, wherein the component A is a water-based adhesive; the component B is formed by mixing petroleum asphalt, a median crack emulsifier, hydrochloric acid and water; the component C is a defoaming agent; the component D is desulfurized gypsum powder; the component E is formed by mixing a stabilizing agent and water; the components are respectively as follows according to the mass portion ratio: 10-50 parts of component A, 10-25 parts of component B, 1-5 parts of component C, 25-45 parts of component D and 5-20 parts of component E; the desulfurized gypsum powder-based pavement water-based crack pouring adhesive can be used for repairing cracks of cement pavements or asphalt pavements, and has the advantages of capability of being quickly constructed at normal temperature, no damage to pavements and the like because no grooving and crack expanding are needed in the traditional heating type crack pouring adhesive construction.
Description
Technical Field
The invention belongs to the technical field of chemical building materials, and particularly relates to a desulfurized gypsum powder-based pavement water-based crack pouring adhesive and a preparation method thereof.
Background
Road surface damage is mainly divided into two categories, functional attenuation and structural damage. The structural damage of the road surface acts on the surface of the road surface, and mainly refers to various cracks, such as longitudinal cracks, chaps, block cracks, transverse cracks, net cracks and the like, appearing on the road surface. The cracks are not afraid, but secondary diseases caused by water seepage at the cracks cannot be ignored. If the crack appears in the bituminous paving, external water will permeate through the crack, accumulate at basic unit top surface, because the semi-rigid basic unit is a compact material, the seeped ponding can not be in time got rid of from basic unit infiltration, will produce powerful running water pressure under the effect of traffic load, make basic unit top surface produce great scouring effect, lead to basic unit and bituminous surface layer to lose continuous state, meanwhile, bituminous surface layer bottom surface tensile stress, the top surface shear stress can increase fast, aggravate the damage speed on road surface, it is possible that the phenomenon such as big net crack appears in very short time, the pot hole, the purt thick liquid, it is loose, serious can directly lead to the road surface to produce structural destruction, not only shorten road surface life, and influence way appearance and road surface service function.
After cracks appear, the cracks are usually repaired by modified asphalt, including SBS modified asphalt, rubber modified asphalt, composite modified asphalt and the like, which are collectively called as heating type crack pouring glue. The heating type joint filling glue is usually required to be slotted and expanded and filled for the joint filling operation of pavement cracks, at least three sets of equipment including a hot melting kettle, a slotting machine and a joint filling machine are used, time, labor and money are wasted, more serious the slotting and expanding process can cause the loosening of mixture at the periphery of the cracks, the hidden danger of more diseases is possibly left, asphalt smoke is generated by heating asphalt, the environment pollution is caused, and particularly the health of constructors is influenced. Compared with the traditional heating type crack pouring sealant, the developed water-based crack pouring sealant has the advantages that: (1) the water-based material is constructed at normal temperature, and is green and environment-friendly; (2) slotting and seam expanding are not needed, construction is simple, convenient and quick, and equipment investment is saved; (3) the damage of the concrete around the crack caused by slotting and expanding of the heating type crack pouring glue is reduced, and the method belongs to a nondestructive crack pouring process.
Disclosure of Invention
Based on the above-mentioned shortcomings and drawbacks of the prior art, it is an object of the present invention to at least solve one or more of the above-mentioned problems of the prior art, in other words, to provide a desulfurized gypsum powder based aqueous road surface crack sealing compound which satisfies one or more of the above-mentioned needs.
The invention also aims to provide a preparation method of the desulfurized gypsum powder-based pavement water-based joint grouting adhesive.
In order to achieve the purpose, the invention adopts the following technical scheme:
the desulfurized gypsum powder-based pavement water-based crack pouring adhesive comprises the following components in parts by mass: 10-50 parts of component A, 10-25 parts of component B, 1-5 parts of component C, 25-45 parts of component D and 5-20 parts of component E;
wherein the component A is an aqueous adhesive; the component B is formed by mixing petroleum asphalt, a median crack emulsifier, hydrochloric acid and water; the component C is a defoaming agent; the component D is desulfurized gypsum powder; the component E is formed by mixing a stabilizing agent and water.
As a preferred scheme, the component B comprises the following components in parts by mass: 40-60 parts of petroleum asphalt, 1-1.6 parts of medium cracking emulsifier, 0.5-1.5 parts of hydrochloric acid and 40-60 parts of water.
As a preferred scheme, the component E comprises the following components in parts by mass: 5-10 parts of stabilizer and 90-95 parts of water.
Preferably, the aqueous adhesive is a combination of at least two of cationic styrene-butadiene latex, cationic SBS latex and cationic acrylic emulsion.
Preferably, the petroleum asphalt is one or two of No. 70 petroleum asphalt and No. 90 petroleum asphalt.
Preferably, the middle-split emulsifier is one or two of a quaternary ammonium salt type emulsifier and N-alkyl propylene diamine.
Preferably, the defoaming agent is one or more of isobutanol, tributyl phosphate and an organic silicon defoaming agent.
Preferably, the fineness of the desulfurized gypsum powder is 200 meshes.
Preferably, the stabilizer is one or two of polyvinyl alcohol and sodium hydroxymethyl cellulose.
The invention also provides a preparation method of the desulfurized gypsum powder-based pavement water-based crack pouring adhesive, which comprises the following steps:
s1, preparing a component B: adding the median cracked emulsifier into water, stirring and heating to 55 ℃ or below until the emulsifier is dissolved; then hydrochloric acid was added to pH 2 of the aqueous solution, stirred and heated to 55 ℃; heating the petroleum asphalt to 135 ℃, mixing the petroleum asphalt with the aqueous solution, and cooling the mixture to room temperature for later use;
s2, preparing a component E: adding water into a reaction kettle, starting a high-speed dispersion machine at normal temperature, rotating at the speed of 400-;
s3, mixing: adding the component A, the component B and the component C into a reaction kettle, starting a high-speed dispersion machine, keeping the rotating speed at 400-450rpm, and stirring for 10-25 min; then the rotating speed is increased to 800-900rpm, five equal parts of the component D are added into the reaction kettle one by one, and the interval is 5-10min each time; then increasing the rotating speed to 1500 plus 1800rpm, adding the component E into the reaction kettle, and stirring for 30-45 min; and finally, slowly reducing the speed to 100rpm, and stirring for 5-15min to obtain the desulfurized gypsum powder-based pavement water-based crack pouring adhesive.
Compared with the prior art, the invention has the following technical effects:
compared with the traditional heating type crack pouring adhesive, the desulfurized gypsum powder-based pavement water-based crack pouring adhesive has the following advantages: the high-temperature heat resistance is excellent, the sealant is suitable for being applied in low-temperature regions, the bonding strength is 35-77% higher than that of the traditional heating type crack pouring sealant, the bonding effect between the crack pouring sealant and the original pavement is ensured, and the durability and the long-acting waterproof capability of the crack pouring sealant are improved; the construction can be carried out quickly at normal temperature, and no damage is caused to the pavement because slotting and seam expanding are not needed.
Detailed Description
The technical solution of the present invention is further explained by the following specific examples.
Example 1:
the preparation method of the high-doped desulfurized gypsum powder-based pavement water-based crack pouring adhesive specifically comprises the following steps:
s1, preparing a component B: adding 1.2 parts of quaternary ammonium salt emulsifier serving as a mid-crack emulsifier into 40 parts of water, and heating while stirring until the solution is transparent; adding hydrochloric acid until the pH of the solution is 2, and heating the emulsifier solution to 60 ℃; simultaneously, heating 58.8 parts of No. 70 petroleum asphalt to 135 ℃, circulating, shearing and dispersing the heated petroleum asphalt and the emulsifier solution in asphalt emulsifying equipment to form uniform tan liquid, and cooling at room temperature to obtain a component B;
s2, preparing a component E: adding 95 parts of water into a reaction kettle, starting a high-speed dispersion machine at normal temperature, rotating at 400rpm, slowly adding 5 parts of polyvinyl alcohol, stirring at 400rpm for 60min, stopping stirring, standing and defoaming until the solution is transparent for later use;
s3, preparing the high-content desulfurized gypsum powder-based pavement water-based crack pouring adhesive: adding 30 parts of component A (15 parts of cationic styrene-butadiene latex and 15 parts of cationic SBS latex), 20 parts of component B and 1 part of component C (organic silicon defoamer) into a reaction kettle, starting a high-speed dispersion machine, keeping the rotating speed at 400rpm, and stirring for 25 min; the rotating speed is increased to 800rpm, and then 39 parts of desulfurized gypsum powder (with the fineness of 200 meshes) are added into the reaction kettle in five equal parts one by one, with the interval of 5min each time; increasing the rotating speed to 1800rpm, adding 10 parts of the component E into the reaction kettle, and stirring for 45 min; slowly reducing the speed to 100rpm, and stirring for 15min to obtain the high-doped desulfurized gypsum powder-based pavement water-based crack pouring sealant product.
Example 2:
the preparation method of the high-doped desulfurized gypsum powder-based pavement water-based crack pouring adhesive specifically comprises the following steps:
s1, preparing a component B: adding 1.6 parts of quaternary ammonium salt emulsifier serving as a middle-split emulsifier into 48.4 parts of water, and heating while stirring until the solution is transparent; adding hydrochloric acid until the pH of the solution is 2, and heating the emulsifier solution to 60 ℃; simultaneously, heating 50 parts of No. 70 petroleum asphalt to 135 ℃, circulating, shearing and dispersing the heated petroleum asphalt and the emulsifier solution in asphalt emulsifying equipment to form uniform tan liquid, and cooling at room temperature to obtain a component B;
s2, preparing a component E: adding 90 parts of water into a reaction kettle, starting a high-speed dispersion machine at normal temperature, rotating at 500rpm, slowly adding 10 parts of polyvinyl alcohol, stirring at 500rpm for 60min, stopping stirring, standing and defoaming until the solution is transparent for later use;
s3, preparing the high-content desulfurized gypsum powder-based pavement water-based crack pouring adhesive: adding 35 parts of component A (20 parts of cationic styrene-butadiene latex and 15 parts of cationic SBS latex), 25 parts of component B and 1 part of component C (organic silicon defoamer) into a reaction kettle, starting a high-speed dispersion machine, keeping the rotating speed at 400-450rpm, and stirring for 25 min; the rotating speed is increased to 800rpm, then 29 parts of desulfurized gypsum powder (with the fineness of 200 meshes) are added into the reaction kettle in five equal parts one by one, and the interval is 5min each time; increasing the rotating speed to 1800rpm, adding 10 parts of the component E into the reaction kettle, and stirring for 45 min; slowly reducing the speed to 100rpm, and stirring for 15min to obtain the high-doped desulfurized gypsum powder-based pavement water-based crack pouring sealant product.
Example 3:
the preparation method of the high-doped desulfurized gypsum powder-based pavement water-based crack pouring adhesive specifically comprises the following steps:
s1, preparing a component B: adding 1.0 part of quaternary ammonium salt type emulsifier and 0.6 part of N-alkyl propylene diamine as middle-split emulsifier into 48.4 parts of water, and heating while stirring until the solution is transparent; adding hydrochloric acid until the pH of the solution is 2, and heating the emulsifier solution to 60 ℃; simultaneously, heating 50 parts of No. 90 petroleum asphalt to 135 ℃, circulating, shearing and dispersing the heated 90 petroleum asphalt and an emulsifier solution in asphalt emulsification equipment to form uniform tan liquid, and cooling at room temperature to obtain a component B;
s2, preparing a component E: adding 92.5 parts of water into a reaction kettle, starting a high-speed dispersion machine at normal temperature, rotating at 500rpm, slowly adding 7.5 parts of polyvinyl alcohol, stirring at 500rpm for 60min, stopping stirring, standing and defoaming until the solution is transparent for later use;
s3, preparing the high-content desulfurized gypsum powder-based pavement water-based crack pouring adhesive: adding 45 parts of component A (20 parts of cationic styrene-butadiene latex and 25 parts of cationic SBS latex), 20 parts of component B and 1 part of component C (organic silicon defoamer) into a reaction kettle, starting a high-speed dispersion machine, keeping the rotating speed at 400-450rpm, and stirring for 25 min. The rotating speed is increased to 800rpm, then 25 parts of desulfurized gypsum powder (with the fineness of 200 meshes) are added into the reaction kettle in five equal parts one by one, and the interval is 5min each time; increasing the rotating speed to 1800rpm, adding 9 parts of the component E into the reaction kettle, and stirring for 45 min; slowly reducing the speed to 100rpm, and stirring for 15min to obtain the high-doped desulfurized gypsum powder-based pavement water-based crack pouring sealant product.
The test results of the high-content desulfurized gypsum powder-based pavement water-based crack pouring adhesive prepared in examples 1-3 are shown in the following table:
from the above table, compared with the traditional heating type crack pouring adhesive, the high-doped desulfurized gypsum powder-based pavement water-based crack pouring adhesive has the following advantages: the high-temperature heat resistance is excellent, the temperature of the road surface in summer in China can reach 75 ℃ at most, and the road surface cannot be adhered by automobile tires; examples 1-3 low temperature flexibility respectively satisfy 0 ℃, -10 ℃, -20 ℃ coating no fracture and crack generation, respectively are suitable for annual minimum temperature 0 ℃, -10 ℃, -20 ℃ region application; the bonding strength of the high-doped desulfurized gypsum powder-based pavement water-based crack pouring adhesive prepared in examples 1-3 is 35-77% higher than that of the traditional heating type crack pouring adhesive, so that the bonding effect between the crack pouring adhesive and the original pavement is ensured, and the durability and the long-acting waterproof capability of the crack pouring adhesive are improved.
The high-doped desulfurized gypsum powder-based pavement water-based crack pouring adhesive belongs to water-based materials, is green and environment-friendly, can be quickly constructed at normal temperature, is simple in equipment, and has the characteristics of energy conservation and environmental protection compared with the traditional heating type crack pouring adhesive.
The high-doped desulfurized gypsum powder-based pavement water-based crack pouring adhesive has the characteristics of excellent high-temperature heat resistance, good low-temperature flexibility, high bonding strength with the original pavement and the like, and after construction, the durability is good, the pavement water resistance can be continuously guaranteed, and the service life of the pavement is prolonged.
The addition amount of the desulfurized gypsum powder in the high-addition-amount desulfurized gypsum powder-based pavement water-based crack pouring adhesive is up to 25-45%, and the desulfurized gypsum powder is a solid waste, so that a new way is provided for recycling the desulfurized gypsum powder which is a solid waste resource.
In the above embodiment and its alternatives, the component A can be optionally selected between 10-50 parts, and the component B can be optionally selected between 10-25 parts; the component C can be selected randomly from 1 to 5 parts; the component D can be randomly selected from 25 to 45 parts; the component E can be arbitrarily selected from 5 to 20 parts.
In the above embodiment and its alternative, in the component B, 40-60 parts of petroleum asphalt, 1-1.6 parts of medium cracking emulsifier, 0.5-1.5 parts of hydrochloric acid and 40-60 parts of water; the components can be selected randomly within the mass portion interval corresponding to each component.
In the above examples and alternatives, the E component has 5-10 parts of stabilizer and 90-95 parts of water; the components can be selected randomly within the mass portion interval corresponding to each component.
In the above embodiments and their alternatives, the aqueous adhesive may also be selected from any two or more of cationic styrene-butadiene latex, cationic SBS latex, and cationic acrylic emulsion.
In the above embodiments and their alternatives, the petroleum asphalt can also be any one or two of No. 70 petroleum asphalt and No. 90 petroleum asphalt.
In the above embodiments and their alternatives, the medium-splitting emulsifier can also be selected from any one or two of quaternary ammonium salt type emulsifier and N-alkyl propylene diamine.
In the above embodiments and their alternatives, the defoaming agent can also be selected from any one or more of isobutanol, tributyl phosphate and silicone defoaming agent.
In the above embodiments and their alternatives, the stabilizer may also be selected from one or two of polyvinyl alcohol and sodium hydroxymethyl cellulose.
In the above embodiment and its alternative, the rotation speed during the preparation of the E component can also be selected between 400-500rpm according to actual requirements.
In the embodiment and the alternative scheme thereof, the component A, the component B and the component C are added into a reaction kettle, a high-speed dispersion machine is started, the rotating speed is kept at 400-450rpm, and the stirring time can be selected between 10-25min according to actual requirements; then, the rotating speed is increased to 800-900rpm, and selection is carried out according to actual requirements, five equal parts of the component D are sequentially added into the reaction kettle, the interval is 5-10min each time, and the interval duration is selected according to the actual requirements; then, the rotating speed is increased to 1500-1800rpm, selection is carried out according to actual requirements, the component E is added into the reaction kettle, stirring is carried out for 30-45min, and selection is carried out according to actual requirements; and finally, slowly reducing the speed to 100rpm, and stirring for 5-15min to select according to actual requirements.
The foregoing has outlined rather broadly the preferred embodiments and principles of the present invention and it will be appreciated that those skilled in the art may devise variations of the present invention that are within the spirit and scope of the appended claims.
Claims (10)
1. The water-based joint grouting adhesive for the desulfurized gypsum powder-based pavement is characterized by comprising the following components in parts by mass: 10-50 parts of component A, 10-25 parts of component B, 1-5 parts of component C, 25-45 parts of component D and 5-20 parts of component E;
wherein the component A is an aqueous adhesive; the component B is formed by mixing petroleum asphalt, a median crack emulsifier, hydrochloric acid and water; the component C is a defoaming agent; the component D is desulfurized gypsum powder; the component E is formed by mixing a stabilizing agent and water.
2. The water-based joint grouting glue for the desulfurized gypsum powder-based pavement according to claim 1, wherein the component B comprises the following components in parts by mass: 40-60 parts of petroleum asphalt, 1-1.6 parts of medium cracking emulsifier, 0.5-1.5 parts of hydrochloric acid and 40-60 parts of water.
3. The water-based joint grouting glue for the desulfurized gypsum powder-based pavement according to claim 1, wherein the component E comprises the following components in parts by weight: 5-10 parts of stabilizer and 90-95 parts of water.
4. The desulfurized gypsum powder-based aqueous joint grouting glue of claim 1, wherein the aqueous adhesive is a combination of at least two of cationic styrene-butadiene latex, cationic SBS latex and cationic acrylic emulsion.
5. The desulfurized gypsum powder-based pavement water-based crack pouring adhesive as claimed in claim 1, wherein the petroleum asphalt is one or two of No. 70 petroleum asphalt and No. 90 petroleum asphalt.
6. The desulfurized gypsum powder-based pavement water-based crack pouring adhesive as claimed in claim 1, wherein the median crack emulsifier is one or two of quaternary ammonium salt type emulsifier and N-alkyl propylene diamine.
7. The desulfurized gypsum powder-based pavement water-based crack pouring adhesive as claimed in claim 1, wherein the defoaming agent is one or more of isobutanol, tributyl phosphate and an organic silicon defoaming agent.
8. The waterborne crack pouring sealant for the desulfurized gypsum powder-based pavement according to claim 1, wherein the fineness of the desulfurized gypsum powder is 200 meshes.
9. The desulfurized gypsum powder-based pavement water-based crack pouring adhesive as claimed in claim 1, wherein the stabilizer is one or two of polyvinyl alcohol and sodium hydroxymethyl cellulose.
10. The preparation method of the desulfurized gypsum powder-based pavement water-based crack pouring adhesive according to any one of claims 1 to 9, characterized by comprising the following steps:
s1, preparing a component B: adding the median cracked emulsifier into water, stirring and heating to 55 ℃ or below until the emulsifier is dissolved; then hydrochloric acid was added to pH 2 of the aqueous solution, stirred and heated to 55 ℃; heating the petroleum asphalt to 135 ℃, mixing the petroleum asphalt with the aqueous solution, and cooling the mixture to room temperature for later use;
s2, preparing a component E: adding water into a reaction kettle, starting a high-speed dispersion machine at normal temperature, rotating at the speed of 400-;
s3, mixing: adding the component A, the component B and the component C into a reaction kettle, starting a high-speed dispersion machine, keeping the rotating speed at 400-450rpm, and stirring for 10-25 min; then the rotating speed is increased to 800-900rpm, five equal parts of the component D are added into the reaction kettle one by one, and the interval is 5-10min each time; then increasing the rotating speed to 1500 plus 1800rpm, adding the component E into the reaction kettle, and stirring for 30-45 min; and finally, slowly reducing the speed to 100rpm, and stirring for 5-15min to obtain the desulfurized gypsum powder-based pavement water-based crack pouring adhesive.
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