High-strength low-elasticity water-soluble resin cement slurry

Abstract

The application discloses a kind of high-strength low-elasticity water-soluble resin cement paste, including the following weight parts raw materials: Portland cement 40-50 parts, resin modified material 10-15 parts, acrylic emulsion 5-10 parts, silicon nitride whisker 1-5 parts, borax 1-4 parts, nano alumina 1-5 parts, interface modifier 1-5 parts, ethanol 45-55 parts.The cement paste of the application is based on Portland cement, by adding resin modified material, silicon nitride whisker, nano alumina and acrylic emulsion and other raw materials, the strength performance of product is enhanced, at the same time, the resin modified material uses lanthanum sulfate solution, first stirring is mixed fully, then add tetra-n-propyl zirconate, N-2-aminoethyl-3-aminopropyl trimethoxysilane, modified nano silicon dioxide raw material contact reaction, after resin modification, the interface force effect between resin and inorganic raw materials is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cement paste, in particular to a high-strength low-elasticity water-soluble resin cement paste. BACKGROUND

[0002] Cement paste is a working fluid used in cementing, and the function of cement paste is cementing. Cementing operation is to inject cement paste into the annulus between the casing and the well wall and let it return to a certain height, and then the cement paste becomes cement stone to cement the casing and the well wall. Cement paste is composed of water, cement, additives and admixtures. The additives and admixtures of cement paste are used to adjust the performance of cement paste, and some special substances need to be added, and the amount of the special substances is less than or equal to 5% of the mass of cement, which is called additive; the amount of the special substances is greater than 5% of the mass of cement, which is called admixture.

[0003] The existing cement paste is mostly inorganic material, and adding resin and other raw materials can easily affect the interface performance of the product, thereby reducing the overall performance. Therefore, the present application provides a high-strength low-elasticity water-soluble resin cement paste. SUMMARY

[0004] The purpose of the present application is to provide a high-strength low-elasticity water-soluble resin cement paste to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A high-strength low-elasticity water-soluble resin cement paste comprises the following raw materials by weight:

[0007] 40-50 parts of Portland cement, 10-15 parts of resin modifier, 5-10 parts of acrylic emulsion, 1-5 parts of silicon nitride whisker, 1-4 parts of borax, 1-5 parts of nano-alumina, 1-5 parts of interface modifier, and 45-55 parts of ethanol.

[0008] Preferably, the high-strength low-elasticity water-soluble resin cement paste comprises the following raw materials by weight:

[0009] 45 parts of Portland cement, 12.5 parts of resin modifier, 7.5 parts of acrylic emulsion, 3 parts of silicon nitride whisker, 2.5 parts of borax, 3 parts of nano-alumina, 3 parts of interface modifier, and 50 parts of ethanol.

[0010] Preferably, the preparation method of the resin modifier is:

[0011] S101: 10-20 parts of epoxy resin are added to 15-25 parts of ethanol solvent, then 1-5 parts of lanthanum sulfate solution is added, and the mixture is stirred and mixed sufficiently to obtain a base modifier;

[0012] S102: 10-20 parts of tetra-n-propyl zirconate, 1-5 parts of N-2-aminoethyl-3-aminopropyl trimethoxysilane are added into the base modified material, then 1-3 parts of modified nano-silica is added, and stirring reaction is carried out to obtain resin modified material.

[0013] Preferably, the mass fraction of the lanthanum sulfate solution is 5-10%.

[0014] Preferably, the stirring treatment temperature in S102 is 65-70 DEG C, the stirring time is 10-20 min, and the stirring speed is 300-400 r / min.

[0015] Preferably, the modification method of the modified nano-silica is as follows: nano-silica is sent into 10-20 parts of 5% mass fraction sodium dodecyl sulfate solution, then 1-3 parts of 3-(methacryloyloxy) propyl trimethoxysilane is added, ultrasonic reaction is carried out, and after reaction, water washing and drying are carried out to obtain modified nano-silica.

[0016] Preferably, the power of the modified nano-silica is 100-500 W, and the ultrasonic time is 20-30 min.

[0017] Preferably, the particle size of the nano-silica is 1-5 nm.

[0018] Preferably, the preparation method of the interface modifier is as follows: 5-10 parts of silane coupling agent is added into 15-25 parts of water, then acetic acid is added to adjust pH to 4.5, then chitosan is added, until chitosan is dissolved, then 1-3 parts of acetylacetone is added, and stirring and mixing are carried out to obtain the interface modifier.

[0019] Preferably, the silane coupling agent is silane coupling agent KH570.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] The cement paste of the present application takes silicate cement as a base, and by adding resin modified material, silicon nitride whisker, nano-alumina and acrylic emulsion and other raw materials, the strength performance of the product is enhanced, meanwhile, the resin modified material adopts lanthanum sulfate solution, and after stirring and mixing sufficiently, tetra-n-propyl zirconate, N-2-aminoethyl-3-aminopropyl trimethoxysilane and modified nano-silica are added to contact and react, and after the resin is modified, the interface force effect between the resin and inorganic raw materials is enhanced, and by adding interface modifier, the interface reaction effect between raw materials is improved by adding silane coupling agent into 15-25 parts of water, then adding acetic acid to adjust pH to 4.5, and then adding chitosan, and the prepared interface modifier, and the strength performance of the product is enhanced. DETAILED DESCRIPTION

[0022] With reference to the specific embodiments below, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0023] The high-strength low-elasticity water-soluble resin cement slurry of the present embodiment comprises the following raw materials by weight:

[0024] 40-50 parts of Portland cement, 10-15 parts of resin modifier, 5-10 parts of acrylic emulsion, 1-5 parts of silicon nitride whisker, 1-4 parts of borax, 1-5 parts of nano-alumina, 1-5 parts of interface modifier, and 45-55 parts of ethanol.

[0025] The high-strength low-elasticity water-soluble resin cement slurry of the present embodiment comprises the following raw materials by weight:

[0026] 45 parts of Portland cement, 12.5 parts of resin modifier, 7.5 parts of acrylic emulsion, 3 parts of silicon nitride whisker, 2.5 parts of borax, 3 parts of nano-alumina, 3 parts of interface modifier, and 50 parts of ethanol.

[0027] The preparation method of the resin modifier of the present embodiment is as follows:

[0028] S101: 10-20 parts of epoxy resin is added to 15-25 parts of ethanol solvent, then 1-5 parts of lanthanum sulfate solution is added, and the mixture is stirred and mixed thoroughly to obtain a base modifier;

[0029] S102: 10-20 parts of tetra-n-propyl zirconate and 1-5 parts of N-2-aminoethyl-3-aminopropyl trimethoxysilane are added to the base modifier, then 1-3 parts of modified nano-silica is added, and the mixture is stirred and reacted to obtain the resin modifier.

[0030] The lanthanum sulfate solution of the present embodiment has a mass fraction of 5-10%.

[0031] In S102 of the present embodiment, the stirring treatment temperature is 65-70°C, the stirring time is 10-20 min, and the stirring speed is 300-400 r / min.

[0032] The modification method of the modified nano-silica of the present embodiment is as follows: nano-silica is sent into 10-20 parts of a 5% mass fraction sodium dodecyl sulfate solution, then 1-3 parts of 3-(methacryloyloxy) propyl trimethoxysilane is added, and the mixture is ultrasonically reacted, and after the reaction is completed, the mixture is washed with water and dried to obtain the modified nano-silica.

[0033] The power of the modified nano-silica of the present embodiment is 100-500 W, and the ultrasonic time is 20-30 min.

[0034] The particle size of the nanometer silicon dioxide in this embodiment is 1-5nm.

[0035] The preparation method of the interface modifier in this embodiment is: 5-10 parts of silane coupling agent is added into 15-25 parts of water, then acetic acid is added to adjust the pH to 4.5, then chitosan is added until chitosan is completely dissolved, then 1-3 parts of acetylacetone is added, and the mixture is stirred and mixed fully to obtain the interface modifier.

[0036] The silane coupling agent in this embodiment is silane coupling agent KH570.

[0037] Embodiment 1:

[0038] The high-strength low-elasticity water-soluble resin cement slurry in this embodiment comprises the following raw materials in parts by weight:

[0039] 40 parts of Portland cement, 10 parts of resin modifier, 5 parts of acrylic emulsion, 1 part of silicon nitride whisker, 1 part of borax, 1 part of nanometer alumina, 1 part of interface modifier, and 45 parts of ethanol.

[0040] The preparation method of the resin modifier in this embodiment is:

[0041] S101: 10 parts of epoxy resin is added into 15 parts of ethanol solvent, then 1 part of lanthanum sulfate solution is added, and the mixture is stirred and mixed fully to obtain the base modifier;

[0042] S102: 10 parts of tetra-n-propyl zirconate, 1 part of N-2-aminoethyl-3-aminopropyl trimethoxysilane, and then 1 part of modified nanometer silicon dioxide are added into the base modifier, and the mixture is stirred and reacted to obtain the resin modifier.

[0043] The mass fraction of the lanthanum sulfate solution in this embodiment is 5%.

[0044] The stirring treatment temperature in S102 of this embodiment is 65℃, the stirring time is 10 min, and the stirring speed is 300r / min.

[0045] The modification method of the modified nanometer silicon dioxide in this embodiment is: the nanometer silicon dioxide is sent into 10 parts of 5% mass fraction sodium dodecyl sulfate solution, then 1 part of 3-(methacryloyloxy) propyl trimethoxysilane is added, ultrasonic reaction is performed, the reaction is completed, and water washing and drying are performed to obtain the modified nanometer silicon dioxide.

[0046] The power of the modified nanometer silicon dioxide in this embodiment is 100W, and the ultrasonic time is 20min.

[0047] The particle size of the nanometer silicon dioxide in this embodiment is 1nm.

[0048] The preparation method of the interface modifier of the embodiment is as follows: 5 parts of silane coupling agent is added into 15 parts of water, then acetic acid is added to adjust the pH to 4.5, then chitosan is added until the chitosan is completely dissolved, then 1 part of acetylacetone is added, and the mixture is stirred and mixed sufficiently to obtain the interface modifier.

[0049] The silane coupling agent of the embodiment is silane coupling agent KH570.

[0050] Embodiment 2:

[0051] The high-strength low-elasticity water-soluble resin cement slurry of the embodiment comprises the following raw materials in parts by weight:

[0052] 50 parts of Portland cement, 15 parts of resin modifier, 10 parts of acrylic emulsion, 5 parts of silicon nitride whisker, 4 parts of borax, 5 parts of nano-alumina, 5 parts of interface modifier, and 55 parts of ethanol.

[0053] The preparation method of the resin modifier of the embodiment is as follows:

[0054] S101: 20 parts of epoxy resin is added into 25 parts of ethanol solvent, then 5 parts of lanthanum sulfate solution is added, and the mixture is stirred and mixed sufficiently to obtain the base modifier;

[0055] S102: 20 parts of tetra-n-propyl zirconate and 5 parts of N-2-aminoethyl-3-aminopropyl trimethoxysilane are added into the base modifier, then 3 parts of modified nano-silica is added, and the mixture is stirred and reacted to obtain the resin modifier.

[0056] The mass fraction of the lanthanum sulfate solution of the embodiment is 10%.

[0057] The stirring treatment temperature in S102 of the embodiment is 70°C, the stirring time is 20 min, and the stirring speed is 400 r / min.

[0058] The modification method of the modified nano-silica of the embodiment is as follows: nano-silica is put into 20 parts of 5% mass fraction sodium dodecyl sulfate solution, then 3 parts of 3-(methacryloyloxy) propyl trimethoxysilane is added, ultrasonic reaction is performed, the reaction is completed, and water washing and drying are performed to obtain the modified nano-silica.

[0059] The power of the modified nano-silica of the embodiment is 500 W, and the ultrasonic time is 30 min.

[0060] The particle size of the nano-silica of the embodiment is 5 nm.

[0061] The preparation method of the interface modifier of the embodiment is: 10 parts of silane coupling agent is added into 25 parts of water, then acetic acid is added to adjust the pH to 4.5, then chitosan is added until the chitosan is completely dissolved, then 3 parts of acetylacetone is added, and the mixture is stirred and mixed sufficiently to obtain the interface modifier.

[0062] The silane coupling agent of the embodiment is silane coupling agent KH570.

[0063] Embodiment 3:

[0064] The high-strength low-elasticity water-soluble resin cement slurry of the embodiment comprises the following raw materials in parts by weight:

[0065] 45 parts of Portland cement, 12.5 parts of resin modifier, 7.5 parts of acrylic emulsion, 3 parts of silicon nitride whisker, 2.5 parts of borax, 3 parts of nano-alumina, 3 parts of interface modifier, and 50 parts of ethanol.

[0066] The preparation method of the resin modifier of the embodiment is:

[0067] S101: 15 parts of epoxy resin is added into 20 parts of ethanol solvent, then 3 parts of lanthanum sulfate solution is added, and the mixture is stirred and mixed sufficiently to obtain the base modifier;

[0068] S102: 15 parts of tetra-n-propyl zirconate and 3 parts of N-2-aminoethyl-3-aminopropyl trimethoxysilane are added into the base modifier, then 2 parts of modified nano-silica is added, and the mixture is stirred and reacted to obtain the resin modifier.

[0069] The mass fraction of the lanthanum sulfate solution of the embodiment is 7.5%.

[0070] The stirring treatment temperature in S102 of the embodiment is 67.5°C, the stirring time is 15 min, and the stirring speed is 350 r / min.

[0071] The modification method of the modified nano-silica of the embodiment is: nano-silica is sent into 15 parts of 5% mass fraction of sodium dodecyl sulfate solution, then 2 parts of 3-(methacryloyloxy) propyl trimethoxysilane is added, ultrasonic reaction is performed, the reaction is completed, and water washing and drying are performed to obtain the modified nano-silica.

[0072] The power of the modified nano-silica of the embodiment is 300 W, and the ultrasonic time is 25 min.

[0073] The particle size of the nano-silica of the embodiment is 3 nm.

[0074] The preparation method of the interface modifier of the embodiment is as follows: 7.5 parts of silane coupling agent is added into 20 parts of water, then acetic acid is added to adjust the pH to 4.5, then chitosan is added until the chitosan is completely dissolved, then 2 parts of acetylacetone is added, and the mixture is stirred and mixed sufficiently to obtain the interface modifier.

[0075] The silane coupling agent of the embodiment is silane coupling agent KH570.

[0076] Embodiment 4:

[0077] The high-strength low-elasticity water-soluble resin cement slurry of the embodiment comprises the following raw materials in parts by weight:

[0078] 42 parts of Portland cement, 12 parts of resin modifier, 6 parts of acrylic emulsion, 2 parts of silicon nitride whisker, 2 parts of borax, 2 parts of nano-alumina, 2 parts of interface modifier, and 46 parts of ethanol.

[0079] The preparation method of the resin modifier of the embodiment is as follows:

[0080] S101: 12 parts of epoxy resin is added into 16 parts of ethanol solvent, then 2 parts of lanthanum sulfate solution is added, and the mixture is stirred and mixed sufficiently to obtain the base modifier;

[0081] S102: 12 parts of tetra-n-propyl zirconate, 2 parts of N-2-aminoethyl-3-aminopropyl trimethoxysilane, and then 2 parts of modified nano-silica are added into the base modifier, and the mixture is stirred and reacted to obtain the resin modifier.

[0082] The mass fraction of the lanthanum sulfate solution of the embodiment is 6%.

[0083] The stirring treatment temperature in S102 of the embodiment is 67℃, the stirring time is 12 min, and the stirring speed is 320 r / min.

[0084] The modification method of the modified nano-silica of the embodiment is as follows: nano-silica is sent into 13 parts of 5% mass fraction sodium dodecyl sulfate solution, then 2 parts of 3-(methacryloyloxy) propyl trimethoxysilane is added, ultrasonic reaction is performed, the reaction is completed, and water washing and drying are performed to obtain the modified nano-silica.

[0085] The power of the modified nano-silica of the embodiment is 200 W, and the ultrasonic time is 22 min.

[0086] The particle size of the nano-silica of the embodiment is 2 nm.

[0087] The preparation method of the interface modifier of the embodiment is: 6 parts of silane coupling agent is added into 16 parts of water, then acetic acid is added to adjust the pH to 4.5, then chitosan is added until the chitosan is completely dissolved, then 2 parts of acetylacetone is added, and the mixture is stirred and mixed sufficiently to obtain the interface modifier.

[0088] The silane coupling agent of the embodiment is silane coupling agent KH570.

[0089] 28d Split strength (MPa) Example 1 0.52 Example 2 0.53 Example 3 0.54 Comparative Example 4 0.51

[0090] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0091] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments which can be understood by those skilled in the art.

Claims

1. A high-strength, low-elasticity, water-soluble resin cement slurry, characterized in that, Including the following parts by weight of raw materials: 40-50 parts silicate cement, 10-15 parts resin modifier, 5-10 parts acrylic emulsion, 1-5 parts silicon nitride whiskers, 1-4 parts borax, 1-5 parts nano alumina, 1-5 parts interface modifier, and 45-55 parts ethanol. The preparation method of the resin modified material is as follows: S101: Add 10-20 parts of epoxy resin to 15-25 parts of ethanol solvent, then add 1-5 parts of lanthanum sulfate solution, stir and mix thoroughly to obtain the modified material; S102: Add 10-20 parts of tetra-n-propyl zirconate and 1-5 parts of N-2-aminoethyl-3-aminopropyltrimethoxysilane to the base modified material, and then add 1-3 parts of modified nano silica. Stir until the reaction is complete to obtain the resin modified material. The preparation method of the interface modifier is as follows: 5-10 parts of silane coupling agent are added to 15-25 parts of water, then acetic acid is added to adjust the pH to 4.5, then chitosan is added until the chitosan is completely dissolved, then 1-3 parts of acetylacetone are added and stirred to mix thoroughly to obtain the interface modifier.

2. The high-strength, low-elasticity, water-soluble resin cement slurry according to claim 1, characterized in that, The high-strength, low-elasticity, water-soluble resin cement slurry comprises the following raw materials in parts by weight: 45 parts silicate cement, 12.5 parts resin modifier, 7.5 parts acrylic emulsion, 3 parts silicon nitride whiskers, 2.5 parts borax, 3 parts nano alumina, 3 parts interface modifier, and 50 parts ethanol.

3. The high-strength, low-elasticity, water-soluble resin cement slurry according to claim 1, characterized in that, The lanthanum sulfate solution has a mass fraction of 5-10%.

4. The high-strength, low-elasticity, water-soluble resin cement grout according to claim 3, characterized in that, The stirring temperature in S102 is 65-70℃, the stirring time is 10-20 min, and the stirring speed is 300-400 r / min.

5. The high-strength, low-elasticity, water-soluble resin cement slurry according to claim 1, characterized in that, The modification method of the modified nano silica is as follows: nano silica is fed into 10-20 parts of a 5% sodium dodecyl sulfate solution, then 1-3 parts of 3-(methacryloyloxy)propyltrimethoxysilane are added, the mixture is subjected to ultrasonic reaction, and after the reaction is completed, it is washed with water and dried to obtain modified nano silica.

6. The high-strength, low-elasticity, water-soluble resin cement grout according to claim 5, characterized in that, The ultrasonic power is 100-500W, and the ultrasonic time is 20-30min.

7. The high-strength, low-elasticity, water-soluble resin cement grout according to claim 5, characterized in that, The particle size of the nano-silica is 1-5 nm.

8. The high-strength, low-elasticity, water-soluble resin cement slurry according to claim 1, characterized in that, The silane coupling agent is silane coupling agent KH570.