Autoclaved aerated concrete reinforcing agent and preparation method thereof

Abstract

The invention discloses an autoclaved aerated concrete reinforcing agent which comprises the following components in parts by weight: 20-21 parts of aluminum sulfate, 19-20 parts of sodium hydroxide, 3-5 parts of triethanolamine, 2-4 parts of polyethylene glycol, 2-4 parts of abietate and 40-60 parts of water. The preparation method comprises the following steps: successively adding sodium hydroxide, triethanolamine, polyethylene glycol and abietate on the basis of a heated and dissolved aluminum sulfate solution, mixing, and uniformly stirring to obtain the product. The autoclaved aerated concrete block is designed according to the porous structure characteristic and the hydrothermal reaction mechanism of the autoclaved aerated concrete block, the abietate is added, so that tiny closed holes are generated in a green body so as to achieve the purpose of increasing small pores of the green body, the abietate has a supporting effect on the green body, the sinking of the green body is reduced, and the service life of the green body is prolonged. The addition of aluminate can promote hydration of cement, can generate various aluminum-containing hydration products in autoclaved curing, and improves the strength of a green body, so that the stability of the pouring height can be improved, the out-of-kettle strength of the green body can be improved, and the rejection rate of autoclaved aerated concrete blocks in the green body pouring process can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of concrete admixtures, and in particular to an autoclaved aerated concrete reinforcing agent and a preparation method thereof. Background Art

[0002] Autoclaved aerated concrete is a porous lightweight silicate building product made of siliceous materials and calcareous materials as the main raw materials, mixed with gas-generating agents and other regulating materials, and made through processes such as batching, pouring, gasification, static stopping, cutting, and autoclaving. Calcium materials include cement and quicklime, and siliceous materials include natural quartz sand and silicon-containing industrial tailings. The technical indicators of cement and quicklime are relatively stable, but the variety of siliceous materials and the large fluctuation of silicon content cause the quality of blocks to fluctuate. At present, the price of quartz sand is high, and most companies use tailings as siliceous materials. However, in addition to SiO2, tailings also contain a large amount of useless or harmful components, which causes the bubbles generated by aluminum powder gasification to burst. Therefore, the pouring height is prone to instability during the pouring process, and there is a risk of scrapping. At the same time, it will also affect the static stopping cutting time of the blank and the strength out of the autoclave. When companies encounter the above problems, they often solve them by adjusting the material mix ratio, but this will increase production costs and reduce the market competitiveness of products. Summary of the invention

[0003] The object of the present invention is to provide an autoclaved aerated concrete reinforcing agent and a preparation method thereof to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides an autoclaved aerated concrete strengthener, comprising the following formula components in parts by weight: 20-21 parts of aluminum sulfate, 19-20 parts of sodium hydroxide, 3-5 parts of triethanolamine, 2-4 parts of polyethylene glycol, 2-4 parts of rosin ester, and 40-60 parts of water.

[0005] As a preferred technical solution of the present invention, the molecular weight of polyethylene glycol is 600.

[0006] A method for preparing an autoclaved aerated concrete reinforcing agent comprises the following steps:

[0007] S1. Heat water to 80°C, then add aluminum sulfate to the hot water and stir until it is completely dissolved to obtain an aluminum sulfate solution;

[0008] S2, adding sodium hydroxide to the aluminum sulfate solution, mixing, stirring evenly, to obtain a primary mixed solution;

[0009] S3, adding triethanolamine to the primary mixed solution, mixing, and stirring evenly to obtain a secondary mixed solution;

[0010] S4, adding polyethylene glycol to the secondary mixed solution, mixing and stirring evenly to obtain a tertiary mixed solution;

[0011] S5. Add rosin ester to the three mixed solutions, mix and stir evenly, and package when the temperature drops to 35° C. to obtain the autoclaved aerated concrete reinforcing agent.

[0012] As a preferred technical solution of the present invention, the sodium hydroxide in step S2 is added in 4 batches, the temperature cannot exceed 95° C., and the feeding time is controlled within 1 hour.

[0013] As a preferred technical solution of the present invention, after the sodium hydroxide in step S2 is added, stirring is continued for 1 hour, and the temperature is maintained at 80-85° C. during stirring.

[0014] As a preferred technical solution of the present invention, the stirring time in step S3 is 10 minutes.

[0015] As a preferred technical solution of the present invention, the stirring time in step S4 is 5 minutes.

[0016] As a preferred technical solution of the present invention, the stirring time in step S5 is 5 minutes.

[0017] As a preferred technical solution of the present invention, the containers used in the steps S1-S5 are all stirred reactors, which can not only stir the mixed solution in the container, but also heat and keep the mixed solution warm, so as to achieve uniform mixing of the mixed solution at a certain temperature.

[0018] Compared with the prior art, the present invention is designed according to the porous structure characteristics of the autoclaved aerated concrete block and its water-heat reaction mechanism, wherein the addition of rosin ester generates tiny closed pores in the green body so as to achieve the purpose of increasing the small pores of the green body, which has a supporting effect on the green body and reduces the sinking of the green body. The addition of aluminate can promote the hydration of cement and produce a variety of aluminum-containing hydration products during autoclaving curing to improve the strength of the green body, thereby improving the stability of the casting height, improving the green body out of the autoclave strength, reducing the scrap rate of the autoclaved aerated concrete block in the green body casting, shortening the green body static cutting time, reducing the production cost of the enterprise while also improving the production efficiency. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the embodiments.

[0020] This embodiment provides a method for preparing an autoclaved aerated concrete reinforcing agent, comprising the following steps:

[0021] S1, adding 50 parts of water into a stirred reactor and heating it to 80°C, then adding 20.5 parts of aluminum sulfate into the hot water in the stirred reactor and stirring until it is completely dissolved to obtain an aluminum sulfate solution;

[0022] S2, 19.5 parts of sodium hydroxide were added into a stirred reactor in 4 batches, the temperature could not exceed 95 ° C, the feeding time was controlled at 1h, and after completion, stirring was continued for 1h, the temperature was maintained at 80-85 ° C, and a mixed solution was obtained;

[0023] S3, adding 4 parts of triethanolamine to the primary mixed solution in a stirred reactor, stirring for 10 minutes to obtain a secondary mixed solution;

[0024] S4, adding 3 parts of polyethylene glycol with a molecular weight of 600 to the secondary mixed solution in a stirred reactor, stirring for 5 minutes to obtain a tertiary mixed solution;

[0025] S5. Add 3 parts of rosin ester to the three mixed solutions in a stirred reactor, stir for 5 minutes, and package when the temperature drops to 35° C. to obtain the autoclaved aerated concrete strengthener.

[0026] Performance test

[0027] 1. Test methods

[0028] Autoclaved aerated concrete was prepared according to the following raw materials in the following mass mix ratios, wherein the added quicklime, cement and the autoclaved aerated concrete reinforcing agent prepared in the examples were in different mass mix ratios.

[0029]

[0030] 2. According to the above mass mix ratio, the improvement effect of the autoclaved aerated concrete strengthener of the present invention on the autoclaved aerated concrete was studied by adding or not. The performance test results are as follows.

[0031]

[0032] The test raw material mass mix ratios numbered 1 and 2 are the benchmark mix ratios without adding the autoclaved aerated concrete strengthener of the present invention, the test raw material mass mix ratios numbered 3 and 4 are the benchmark mix ratios in which 2.7 kg of the autoclaved aerated concrete strengthener of the present invention is added, and the test raw material mass mix ratios numbered 5 and 6 are the benchmark mix ratios in which 2.7 kg of the autoclaved aerated concrete strengthener of the present invention is added while reducing the amount of cement and quicklime by 10%.

[0033] From the test results, it can be seen that after adding the autoclaved aerated concrete strengthener of the present invention, the out-of-kettle strength and the absolute dry strength of the autoclaved aerated concrete can be increased by 10%. While reducing the amount of dry materials by 10%, the out-of-kettle strength and the absolute dry strength of the aerated brick after adding the autoclaved aerated concrete strengthener of the present invention are the same as those of the benchmark mix ratio, indicating that the enterprise can save 10% of the dry material cost, thereby indicating that the autoclaved aerated concrete strengthener of the present invention is added to the autoclaved aerated concrete, which can not only improve the out-of-kettle strength, but also reduce the production cost of the enterprise.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An autoclaved aerated concrete reinforcing agent, characterized in that: The invention comprises the following formula components in parts by weight: 20-21 parts of aluminum sulfate, 19-20 parts of sodium hydroxide, 3-5 parts of triethanolamine, 2-4 parts of polyethylene glycol, 2-4 parts of rosin ester and 40-60 parts of water.

2. The autoclaved aerated concrete reinforcing agent according to claim 1, characterized in that: The molecular weight of the polyethylene glycol is 600.

3. A method for preparing an autoclaved aerated concrete reinforcing agent, characterized in that: The following steps are involved: S1. Heat water to 80°C, then add aluminum sulfate to the hot water and stir until it is completely dissolved to obtain an aluminum sulfate solution; S2, adding sodium hydroxide to the aluminum sulfate solution, mixing, stirring evenly, to obtain a primary mixed solution; S3, adding triethanolamine to the primary mixed solution, mixing, and stirring evenly to obtain a secondary mixed solution; S4, adding polyethylene glycol to the secondary mixed solution, mixing and stirring evenly to obtain a tertiary mixed solution; S5. Add rosin ester to the three mixed solutions, mix and stir evenly, and wait until the temperature drops to 35° C. to obtain the autoclaved aerated concrete reinforcing agent.

4. The method for preparing an autoclaved aerated concrete reinforcing agent according to claim 3, characterized in that: The sodium hydroxide in step S2 is added in 4 batches, the temperature cannot exceed 95° C., and the feeding time is controlled within 1 hour.

5. The method for preparing an autoclaved aerated concrete reinforcing agent according to claim 3, characterized in that: In the step S2, after the sodium hydroxide is added, stirring is continued for 1 hour, and the temperature is maintained at 80-85° C. during stirring.

6. The method for preparing an autoclaved aerated concrete reinforcing agent according to claim 3, characterized in that: The stirring time in step S3 is 10 minutes.

7. The method for preparing an autoclaved aerated concrete reinforcing agent according to claim 3, characterized in that: The stirring time in step S4 is 5 minutes.

8. The method for preparing an autoclaved aerated concrete reinforcing agent according to claim 3, characterized in that: The stirring time in step S5 is 5 minutes.

9. The method for preparing an autoclaved aerated concrete reinforcing agent according to claim 3, characterized in that: The containers used in steps S1 to S5 are all stirred reactors.

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