Multifunctional concrete solidifying agent and preparation method thereof

Abstract

The application discloses a multifunctional concrete solidifying agent and a preparation method thereof, and comprises the following raw materials in parts by weight: a solidifying agent component 20-35 parts; a functional component 15-25 parts; deionized water 40-60 parts; the functional component comprises an auxiliary agent, a surfactant and a defoaming agent; the auxiliary agent comprises a wetting agent, a dispersing agent, a thickening agent, a waterproof agent and an efflorescence inhibitor; the prepared solidifying agent has the advantages of low cost, good stability, high cost performance, high strength and high wear resistance; the prepared solidifying agent has good permeability of a concrete microstructure while ensuring that the solidifying agent component is fully dissolved in the high-molecular auxiliary agent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete repair, in particular to a multifunctional concrete solidifying agent and a preparation method thereof. BACKGROUND

[0002] The concrete solidifying agent is a kind of inorganic transparent colorless odorless liquid material, which can react with cement through natural penetration to the surface of concrete to produce molecular crystal group to block the surface pores, so that the surface of concrete forms a dense whole, thereby improving the wear resistance, compression resistance and sealing property of the surface of concrete. The current main concrete solidifying agent is mainly inorganic fluorosilicate (such as zinc fluorosilicate and magnesium fluorosilicate), and the principle is that zinc fluorosilicate and magnesium fluorosilicate can react with calcium hydroxide in concrete to generate hydrated calcium silicate. The main chemical reactions during the reaction are as follows: Ca 2+ + SiO 2+ + H + → C-S-H (hydrated calcium silicate). These hydrated calcium silicates can greatly improve the strength and hardness of the cement ground, and can also fill the capillary pores in the cement, greatly increasing the chemical corrosion resistance of the cement ground, and achieving the effect of sealing and dust prevention. Although the fluorosilicate solidifying agent has good solidification effect, it also has some disadvantages.

[0003] Due to the inherent process of cement hardening, there are a large number of interconnected capillary pores in the microstructure of concrete, which makes it difficult for the solidifying agent components to penetrate into the internal structure of concrete, which causes poor quality or insufficient density of the surface of concrete, making it difficult for the concrete to resist the erosion of corrosive substances in the environment for a long time, resulting in the emergence of the phenomenon of efflorescence and sanding. The current solution is to add an organic penetrating agent to improve the penetration performance of the solidifying agent components, but since most of the additives are high-molecular-weight organic polymers, the solubility of fluorosilicate in this solution environment is low, which causes the solidifying agent solution to appear turbid, difficult to dissolve and solid aggregation, resulting in loss of effective components of the solidifying agent and performance degradation.

[0004] Therefore, the purpose of the present application is to prepare a multifunctional concrete solidifying agent to solve the above problems. SUMMARY

[0005] The present application provides a multifunctional concrete solidifying agent and a preparation method thereof, which solves the problem that the existing inorganic concrete solidifying agent has low penetration depth, the solidifying components cannot effectively enter the internal structure of concrete, the strength and wear resistance of the concrete are low, and the water permeability resistance is poor, thereby reducing the service life of the concrete.

[0006] The scheme of the present application is as follows:

[0007] A multifunctional concrete solidifying agent, comprising the following raw materials by weight:

[0008] Curing agent component 20-35 parts;

[0009] Functional component 15-25 parts;

[0010] Deionized water 40-60 parts;

[0011] The functional component includes auxiliary agents, surfactants, and defoamers, the auxiliary agents include wetting agents, dispersants, thickening agents, water repellents, and efflorescence inhibitors.

[0012] As a preferred technical solution, the following weight parts of raw materials are included:

[0013]

[0014] As a preferred technical solution, the curing agent component is one or more combinations of magnesium fluosilicate, zinc fluosilicate, sodium silicate, and potassium silicate.

[0015] As a preferred technical solution, the wetting agent is one or more combinations of polyether-modified polysiloxane, isomeric decanol ether, and polypropylene glycol.

[0016] As a preferred technical solution, the defoamer is one or more combinations of ethylene glycol siloxane, polydimethylsiloxane, polyoxypropylene-ethylene oxide glycerol ether, polyoxyethylene ether, polyoxyethylene, and polypropylene pentaerythritol ether.

[0017] As a preferred technical solution, the dispersant is one or more combinations of sodium polyphosphate, sodium polyacrylate, sodium citrate, and polyethylene glycol; the polyethylene glycol is one of polyethylene glycol 200 or polyethylene glycol 400.

[0018] As a preferred technical solution, the efflorescence inhibitor is one or more combinations of thio-bis-ethanol, sodium borohydride, zinc oxide, sodium sulfite, and carbonyl diamine.

[0019] As a preferred technical solution, the thickening agent is one or more combinations of polyacrylamide, sodium polyacrylate, polyoxyethylene, and polyvinylpyrrolidone.

[0020] As a preferred technical solution, the water repellent is one or more combinations of n-octyl triethoxysilane, isobutyl triethoxysilane, sodium methylsilanol, potassium methylsilanol, sodium methylsilicate, and potassium methylsilicate.

[0021] As a preferred technical solution, the surfactant is one or more combinations of fluorocarbon, siloxane, sodium dodecyl sulfonate, and alkyl phenol polyoxyethylene ether.

[0022] The preparation method of the multifunctional concrete curing agent includes the following steps:

[0023] 1) The curing agent component is prepared by the following steps:

[0024] Step A1: Weigh the curing agent component and dry it at 50-80°C;

[0025] Step A2: adding the dried product to a stirred tank and adding deionized water, stirring at a speed of 500 to 1000 r / min for 1 to 1.5 hours to prepare a curing agent component solution;

[0026] 2) Functional components are prepared using the following steps:

[0027] Step B1: Add a wetting agent to a reactor and stir at a speed of 250 to 350 r / min and a temperature of 26° C. After stirring for 10 to 15 minutes, add a waterproofing agent, a dispersant, a thickener, and an alkali inhibitor in sequence, then add deionized water and stir at a speed of 350 to 500 r / min. After mixing evenly, an additive solution is obtained.

[0028] Step B2: The prepared curing agent component solution and the auxiliary agent solution are mixed, stirred at a speed of 800 to 100 r / min, and a surfactant is added. The mixture is stirred at 40 to 60° C. for 15 to 30 minutes to completely mix the solution. Then, a defoaming agent is added and stirred for 1.5 to 2 hours. The resulting solution is filtered to remove insoluble matter, and finally a multifunctional concrete curing agent is obtained.

[0029] The mass concentration of the curing agent component solution is 35-45%. Its main concrete curing function is to react with calcium hydroxide in concrete to generate hydrated calcium silicate, thereby improving the strength and wear resistance of the concrete.

[0030] The functional component concentration is 35-45%, which includes wetting agent, defoaming agent, dispersant, thickener, waterproofing agent, surfactant and other functional additives, all of which can effectively improve the performance of the curing agent and promote the curing agent to fully penetrate into the concrete.

[0031] Due to the adoption of the above technical solution, a multifunctional concrete curing agent and a preparation method thereof include the following raw materials in parts by weight: 20 to 35 parts of a curing agent component; 15 to 25 parts of a functional component; and 40 to 60 parts of deionized water. The functional component includes an auxiliary agent, a surfactant, and a defoaming agent, and the auxiliary agent includes a wetting agent, a dispersant, a thickener, a waterproofing agent, and an alkali-inhibiting agent.

[0032] Advantages of the present invention:

[0033] The wetting agent can be one or more of a combination of polyether modified polysiloxane, isomeric decanol ether, polypropylene glycol. The wetting agent can promote the penetration of the curing agent component into the interior of the concrete. By adding the wetting agent to the curing agent, the surface tension or interfacial tension of the solvent water can be reduced, so that the surface of the concrete can be wetted by the solvent water and a liquid film is formed, thereby promoting the penetration of the curing agent into the concrete.

[0034] The dispersant is one or more of a combination of sodium polyphosphate, sodium polyacrylate, sodium citrate, polyethylene glycol 200 / 400. Most of them are interfacial active agents with both lipophilic and hydrophilic groups of opposite properties, which can uniformly disperse inorganic, organic solids and liquid particles that are difficult to dissolve in liquids. The addition of the dispersant can effectively prevent the settling and agglomeration of the insoluble particles in the curing agent, promote the mixing of the two and form a stable suspension, and ensure the uniformity of the effective performance of the concrete curing agent.

[0035] The thickening agent is one or more of a combination of polyacrylamide, sodium polyacrylate, polyoxyethylene, polyvinylpyrrolidone. The thickening agent can increase the viscosity of the curing agent solution, so that the curing agent remains in a uniform and stable suspension or emulsion state. When the curing agent component enters the interior of the concrete, a relatively firm and well-adhesive curing agent gel can be formed, which can fully block the capillary pores of the concrete, so that the surface layer of the concrete is cured into a dust-free and dense whole.

[0036] The water repellent agent is one or more of a combination of n-octyl triethoxysilane, isobutyl triethoxysilane, sodium methylsilanol, potassium methylsilanol, sodium methylsilicate, potassium methylsilicate. The water repellent agent can effectively reduce the water permeability of the concrete under hydrostatic pressure and form an excellent hydrophobic layer. The hydrophobic film produced can produce a sealing effect, thereby improving the dustproof and water-repellent ability of the concrete and effectively inhibiting the intrusion of water, oil and other corrosive substances into the concrete.

[0037] The surfactant is one or more of a combination of fluorocarbon, siloxane, sodium dodecyl sulfonate, alkylphenol polyoxyethylene ether. The surfactant has a series of physical and chemical effects such as wetting or anti-sticking, emulsification or solubilization, dispersion, washing, corrosion prevention, and antistatic, as well as corresponding practical applications. Most of the additives in the curing agent are polymeric organic solvents, which have poor solubility in water. By adding a surfactant, the water-oil surface tension can be reduced, acting as an intermediate bridge, promoting the full dissolution of the functional additives in the curing agent system, and ensuring the long-term stability of the effective ingredients.

[0038] The defoaming agent is one or more of ethylene glycol siloxane, polydimethylsiloxane, polyoxypropylene / ethylene glycerol ether, polyoxyethylene ether, polyoxyethylene, and polypropylene pentaerythritol ether.

[0039] The efflorescence inhibitor is one or more of thio-bisethanol, sodium borohydride, zinc oxide, sodium sulfite, and carbonyl diamine. The main component of concrete is calcium silicate, which is a weak acid and strong base salt. When it reacts with water, it becomes alkaline, which can cause problems such as whitening, peeling, and wall erosion. By adding an efflorescence inhibitor, the production of free calcium, silicic acid, and hydroxide in concrete can be inhibited, reducing the alkalinity of the concrete and preventing the discoloration of the concrete.

[0040] Compared with a single inorganic curing agent, the curing agent of the present application can effectively enhance the hardness and wear resistance of concrete for a long time by adding functional components of different components, preventing the discoloration of concrete. At the same time, the problem of the use of magnesium fluosilicate in the curing agent is solved by adding various dispersing and penetrating agents, and the curing agent prepared by the present application has the advantages of low cost, good stability, high cost performance, high strength, and high wear resistance.

[0041] The present application can ensure that the components of the curing agent are fully dissolved in the high molecular weight additive, and also has excellent permeability of the microstructure of concrete. DETAILED DESCRIPTION

[0042] The present application provides a multifunctional concrete curing agent and a preparation method thereof

[0043] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described in conjunction with specific examples.

[0044] Example 1:

[0045] Multifunctional concrete curing agent, 30 parts by weight of curing agent component, 20 parts by weight of functional component, 50 parts by weight of deionized water. The 30 parts by weight of functional component consists of 1.5 parts by weight of polyether modified polysiloxane, 0.5 parts by weight of polydimethylsiloxane, 4.5 parts by weight of polyethylene glycol 400, 0.8 parts by weight of polyacrylamide, 6.2 parts by weight of n-octyl triethoxysilane, 1.5 parts by weight of sodium dodecyl sulfonate and 5 parts by weight of carbamide. 30 parts by weight of curing agent component consists of 15 parts by weight of magnesium fluosilicate and 15 parts by weight of zinc fluosilicate.

[0046] The concrete curing agent is made by the following steps:

[0047] Step A1 : magnesium fluosilicate, zinc fluosilicate are weighed and dried at 50-80°C;

[0048] Step A2: the dried magnesium fluosilicate and zinc fluosilicate are added to the stirred tank and 30 parts by weight of deionized water is added, stirred at a speed of 500 r / min for 1.5 h to prepare a curing agent component solution;

[0049] The functional component is made by the following steps:

[0050] Step B1 : polyether modified polysiloxane is added to the reaction kettle, stirred at a speed of 250-350 r / min and a temperature of 26°C, after stirring for 10-15 min, n-octyl triethoxysilane, polyethylene glycol 400, polyacrylamide and carbamide are added in turn, then 20 parts by weight of deionized water is added, and stirred at a speed of 350-500 r / min, until the mixture is uniform, then an auxiliary component solution is prepared.

[0051] Step B2: the curing agent component solution and the auxiliary component solution are mixed, stirred at a speed of 800-100 r / min and sodium dodecyl sulfonate is added, and stirred at a temperature of 40-60°C for 15-30 min to completely mix the solution, then a defoaming agent is added and stirred for 1.5-2 h, the obtained solution is filtered to remove insoluble substances, and finally a multifunctional concrete curing agent is obtained.

[0052] Example 2:

[0053] Multifunctional concrete curing agent, 30 parts by weight of curing agent component, 20 parts by weight of functional component, 50 parts by weight of deionized water. 20 parts by weight of functional component consists of 2.0 parts by weight of polyether modified polysiloxane, 1.5 parts by weight of polydimethylsiloxane, 4.5 parts by weight of sodium polyphosphate, 0.8 parts by weight of polyacrylamide, 6.2 parts by weight of isobutyl triethoxysilane, 1.5 parts by weight of sodium dodecyl sulfonate, 3.5 parts by weight of carbamide, and 1.5 parts by weight of sodium sulfite. 30 parts by weight of curing agent component consists of 15 parts by weight of magnesium fluosilicate and 15 parts by weight of zinc fluosilicate.

[0054] Curing agent component is made by the following steps:

[0055] Step A1: magnesium fluosilicate, zinc fluosilicate are weighed and dried at 50-80℃;

[0056] Step A2: dried magnesium fluosilicate and zinc fluosilicate are added to the stirred tank and 28 parts by weight of deionized water is added;

[0057] Functional component is made by the following steps:

[0058] Step B1: polyether modified polysiloxane is added to the reaction kettle and stirred at a speed of 250-350 r / min and a temperature of 26℃. After stirring for 10-15 min, isobutyl triethoxysilane, sodium polyphosphate, polyacrylamide, carbamide and sodium sulfite are added in sequence. Then 20 parts by weight of deionized water is added and stirred at a speed of 350-500 r / min. After mixing uniformly, the additive component solution is prepared.

[0059] Step B2: the prepared curing agent component solution and additive component solution are mixed and stirred at a speed of 800-100 r / min. Sodium dodecyl sulfonate is added and stirred at a temperature of 40-60℃ for 15-30 min to completely mix the solution uniformly. Then defoaming agent is added and stirred for 1.5-2 h. The obtained solution is filtered to remove insoluble substances. Finally, the multifunctional concrete curing agent is obtained.

[0060] Example 3:

[0061] A multifunctional concrete curing agent is prepared by mixing 30 parts by weight of a curing agent component, 20 parts by weight of a functional component, and 50 parts by weight of deionized water. The 20 parts by weight of the functional component is prepared by mixing 2.0 parts by weight of a polyether-modified polysiloxane, 1.5 parts by weight of a polydimethylsiloxane, 4.5 parts by weight of sodium polyacrylate, 0.8 parts by weight of hydroxypropyl methylcellulose, 6.2 parts by weight of n-octyl triethoxysilane, 1.5 parts by weight of an alkylphenol polyoxyethylene ether, 3.5 parts by weight of carbonyl diamine, and 1.5 parts by weight of sodium borohydride. The 30 parts by weight of the curing agent component is prepared by mixing 15 parts by weight of magnesium fluosilicate and 15 parts by weight of zinc fluosilicate.

[0062] The curing agent component is prepared by the following steps:

[0063] Step A1: Weigh the magnesium fluosilicate and zinc fluosilicate, and dry them at 50-80°C.

[0064] Step A2: Add the dried magnesium fluosilicate and zinc fluosilicate to a stirred tank, and add 30 parts by weight of deionized water. Stir at a speed of 500 r / min for 1.5 h to prepare a curing agent component solution.

[0065] The functional component is prepared by the following steps:

[0066] Step B1: Add the polyether-modified polysiloxane to a reaction kettle, and stir at a speed of 250-350 r / min and a temperature of 26°C. After 10-15 min, add n-octyl triethoxysilane, sodium polyacrylate, hydroxypropyl methylcellulose, carbonyl diamine, and sodium borohydride in sequence. Then add 20 parts by weight of deionized water, and stir at a speed of 350-500 r / min. After the mixture is uniform, a functional component solution is prepared.

[0067] Step B2: Mix the curing agent component solution and the functional component solution, and stir at a speed of 800-100 r / min. Add the alkylphenol polyoxyethylene ether, and stir at a temperature of 40-60°C for 15-30 min to completely mix the solution. Then add a defoaming agent, and stir for 1.5-2 h. The obtained solution is filtered to remove insoluble substances. Finally, a multifunctional concrete curing agent is obtained.

[0068] Example 4:

[0069] A curing agent component is prepared by mixing 20 parts by weight of a curing agent component, which is prepared by mixing 5 parts by weight of magnesium fluosilicate, 5 parts by weight of zinc fluosilicate, 5 parts by weight of sodium silicate, and 5 parts by weight of potassium silicate. A functional component is prepared by mixing 1.5 parts by weight of a wetting agent, 0.5 parts by weight of a defoaming agent, 4 parts by weight of a dispersing agent, 1 part by weight of a thickening agent, 5 parts by weight of a waterproofing agent, 1 part by weight of a surfactant, and 2 parts by weight of an efflorescence inhibitor.

[0070] The wetting agent is a combination of polyether modified polysiloxane, isomeric decanol ether and polypropylene glycol; the defoaming agent is a combination of ethylene glycol siloxane, polydimethylsiloxane, polyoxypropylene ethylene oxide glycerol ether, polyoxyethylene ether, polyoxyethylene and polypropylene pentaerythritol ether; the dispersing agent is a combination of sodium polyphosphate, sodium polyacrylate, sodium citrate and polyethylene glycol; the polyethylene glycol is polyethylene glycol 200; the thickening agent is a combination of polyacrylamide, sodium polyacrylate, polyethylene oxide and polyvinylpyrrolidone; the waterproofing agent is a combination of n-octyl triethoxysilane, isobutyl triethoxysilane, sodium methylsilanol, potassium methylsilanol, sodium methylsilicate and potassium methylsilicate; the surfactant is a combination of fluorocarbon, siloxane, sodium dodecyl sulfonate and alkylphenol polyoxyethylene ether; the salt deposit inhibitor is a combination of thio-bis-ethanol, sodium borohydride, zinc oxide, sodium sulfite and carbonyl diamine.

[0071] The preparation method of the multifunctional concrete solidifying agent comprises the following steps:

[0072] 1) The solidifying agent component is prepared by the following steps:

[0073] Step A1: Weigh the magnesium fluosilicate, zinc fluosilicate, sodium silicate and potassium silicate, mix them and dry them at 50-80°C;

[0074] Step A2: Put the dried material into a stirring kettle and add 40 parts by weight of deionized water, stir at a speed of 500-1000 r / min for 1-1.5 h to prepare a solidifying agent component solution;

[0075] 2) The functional component is prepared by the following steps:

[0076] Step B1: Put the wetting agent into a reaction kettle, stir at a speed of 250-350 r / min and a temperature of 26°C, add the waterproofing agent, dispersing agent, thickening agent and salt deposit inhibitor in sequence after stirring for 10-15 min, then add 20 parts by weight of deionized water and stir at a speed of 350-500 r / min, mix uniformly and prepare an auxiliary solution.

[0077] Step B2: Mix the prepared solidifying agent component solution and auxiliary solution, stir at a speed of 800-100 r / min, add the surfactant and stir at 40-60°C for 15-30 min to completely mix the solution, then add the defoaming agent and stir for 1.5-2 h, filter the obtained solution to remove insoluble substances, and finally the multifunctional concrete solidifying agent is obtained.

[0078] Example 5:

[0079] Prepare 35 parts by weight of the curing agent component, which is composed of 10 parts by weight of magnesium fluosilicate, 10 parts by weight of zinc fluosilicate, 5 parts by weight of sodium silicate and 5 parts by weight of potassium silicate;

[0080] 25 parts by weight of the functional component, which is composed of 2 parts by weight of wetting agent, 2 parts by weight of defoaming agent, 5 parts by weight of dispersing agent, 1 part by weight of thickening agent, 7 parts by weight of waterproofing agent, 2 parts by weight of surfactant and 6 parts by weight of efflorescence inhibitor;

[0081] The wetting agent is a combination of polyether modified polysiloxane, isomeric decanol ether and polypropylene glycol; the defoaming agent is a combination of ethylene glycol siloxane, polydimethylsiloxane, polyoxypropylene oxyethylene glycerol ether, polyoxyethylene ether, polyoxyethylene and polypropylene pentaerythritol ether; the dispersing agent is a combination of sodium polyphosphate, sodium polyacrylate, sodium citrate and polyethylene glycol; the polyethylene glycol is polyethylene glycol 400; the thickening agent is a combination of polyacrylamide, sodium polyacrylate, polyoxyethylene and polyvinylpyrrolidone; the waterproofing agent is a combination of n-octyl triethoxysilane, isobutyl triethoxysilane, sodium methylsilanol, potassium methylsilanol, sodium methylsilicate and potassium methylsilicate; the surfactant is a combination of fluorocarbon, siloxane, sodium dodecyl sulfonate and alkylphenol polyoxyethylene ether; and the efflorescence inhibitor is a combination of thio-bis-ethanol, sodium borohydride, zinc oxide, sodium sulfite and carbonyl diamine.

[0082] The method for preparing the multifunctional concrete curing agent comprises the following steps:

[0083] 1) The curing agent component is prepared by the following steps:

[0084] Step A1: Weigh magnesium fluosilicate, zinc fluosilicate, sodium silicate and potassium silicate, mix them and dry them at 50-80℃, and obtain the dried product;

[0085] Step A2: Put the dried product into a stirring kettle and add 30 parts by weight of deionized water, stir at a speed of 500-1000r / min for 1-1.5h, and obtain the curing agent component solution;

[0086] 2) The functional component is prepared by the following steps:

[0087] Step B1: Put the wetting agent into a reaction kettle, stir at a speed of 250-350r / min and a temperature of 26℃, add the waterproofing agent, dispersing agent, thickening agent and efflorescence inhibitor in sequence after 10-15min of stirring, then add 20 parts by weight of deionized water, and stir at a speed of 350-500r / min until the mixture is uniform, and obtain the additive solution.

[0088] Step B2: The prepared curing agent component solution is mixed with the auxiliary solution, stirred at a rotation speed of 800-100 r / min, and a surfactant is added, and the solution is stirred at 40-60°C for 15-30 min to make the solution fully mixed and uniform, then a defoaming agent is added and stirred for 1.5-2 h, the obtained solution is filtered to remove insoluble substances, and finally a multifunctional concrete curing agent is obtained.

[0089] Test of the effect of the concrete curing agent of Comparative Example 1

[0090] 1. Performance test of the concrete curing agent

[0091] The inorganic concrete curing agents magnesium fluorosilicate and zinc fluorosilicate are selected for the present comparative example. The concrete performance tests are carried out on the curing agents prepared in Examples 1-3 and Comparative Example, and the test results are shown in Table 1 below:

[0092] Table 1 Performance comparison test of the concrete curing agent

[0093]

[0094] As can be seen from Table 1 above, after the concrete sealing curing agents prepared in Examples 1-3 are used, it can be seen from the table that after the sample of each example is sprayed on the concrete standard sample, the Mohs hardness and wear resistance of the concrete can be significantly improved. It can be seen that the Mohs hardness of Examples 1-3 is improved and is greater than that of the inorganic curing agent. The Mohs hardness of Example 3 is the largest, which is 9.8, which shows that the curing agent product of the present application has a significant effect on the hardening of concrete. The good anti-permeation pressure of Examples 1-3 shows that it can effectively plug the micropores in the surface structure of concrete to improve the internal structure density, thereby further improving the hardness and wear resistance of concrete. At the same time, through the detection of the water absorption rate and the liquid drop contact angle of the concrete, it can be seen that the waterproof performance of the concrete of the inorganic curing agent is poor, while the curing agent of the present application makes the concrete have excellent hydrophobicity, the water absorption rate is significantly reduced, and the waterproof and anti-permeation performance of the concrete is greatly improved.

[0095] 2. Anti-reversing alkali effect test of the concrete curing agent

[0096] The flexural strength of the concrete products prepared by the two inorganic concrete curing agents of Examples 1-3 and Comparative Example is determined by using a 500KN (WE 50) hydraulic universal testing machine (test instrument is AEC-201 type cement strength testing machine), and the appearance and reversing alkali phenomenon of the concrete sample are observed. The test results are shown in Table 3.

[0097] Table 3 Performance determination of the anti-reversing alkali concrete sample according to the present application

[0098] Group Flexural strength (MPa) Product appearance Presence or absence of back-alkaline Example 1 18.1 Smooth No back-alkaline Example 2 16.5 Slightly smooth No back-alkaline Example 3 13.2 Slightly rough No back-alkaline Magnesium fluosilicate 11.4 Rough Presence of back-alkaline Zinc fluosilicate 10.7 Rough Presence of back-alkaline

[0099] As shown in Table 2, the flexural strength of the concrete product of the present application is much higher than that of the inorganic fluorosilicate curing agent, and the appearance is rough and has a phenomenon of efflorescence. After using the curing agent of the present application, the appearance of the concrete is strengthened, and the Example 1 has excellent anti-efflorescence performance.

[0100] Test of the time stability of the concrete curing agent of Comparative Example 2

[0101] 1. Test of the water stability of the concrete curing agent

[0102] Test parameter: water stability coefficient

[0103] Test method: three groups of concrete standard samples with an area of 1 m 2 were prepared, 100 g of the curing agent prepared in the present application and the inorganic curing agent were respectively sprayed on two groups of the concrete standard samples, and the other group was not coated with any curing agent as a blank control group, and cured under standard curing conditions for 7 days. The two groups of the concrete standard samples coated with the curing agent were soaked in water for 1 day, 7 days and 14 days, and their strengths were respectively tested. The blank control group was not soaked in water, and was continued to be cured under standard conditions for 1 day, 7 days and 14 days, and their strengths were respectively tested. The water stability coefficient calculation method is: the strength of the sample soaked in water / the strength of the sample cured under standard conditions (1 day, 7 days, 14 days).

[0104] Table 3: Test of the water stability of the concrete curing agent

[0105] Group 1 day 7 days 14 days Example 1 0.98 0.89 0.82 Example 2 0.97 0.85 0.79 Example 3 0.95 0.83 0.76 Magnesium fluosilicate 0.76 0.66 0.53 Zinc fluosilicate 0.73 0.64 0.51

[0106] As shown in Table 3, the curing agents of Examples 1-3 have excellent water stability with a performance of more than 95% from the first day, and the water stability of the inorganic curing agent has decreased to 73-76%. With the increase of the water soaking time, the water stability of the concrete decreases, and when the water soaking time is 14 days, the water stability of the inorganic curing agent has decreased by 50%, and the curing agents of Examples 1-3 still have water stability of more than 70%, and the Example 1 has the most excellent water stability with a water stability coefficient of 0.82, which shows that the water-reducing and strength-improving concrete curing agent of the present application can significantly enhance the water stability of the concrete.

[0107] 2. Test of the stability strength of the concrete curing agent

[0108] Test parameter: compressive strength

[0109] Test method: two groups of concrete standard samples with an area of 1 m 2The 100g solidifying agent prepared by the present application and inorganic solidifying agent were respectively sprayed on the concrete standard sample, the example component standard sample was respectively subjected to compressive strength test at 1 day, 7 days and 14 days; another inorganic solidifying agent group was subjected to test under the same conditions, and the test equipment was a universal press.

[0110] Table 4: Stability strength test of concrete solidifying agent

[0111] Group 1 day (MPa) 7 days (MPa) 14 days (MPa) Example 1 13.6 14.6 17.2 Example 2 13.2 14.3 16.7 Example 3 12.9 14.1 16.5 Magnesium fluosilicate 10.2 11.2 11.8 Zinc fluosilicate 10.7 11.8 12.3

[0112] As shown in Table 4, the concrete strength of the solidifying agent of examples 1-3 is greater than that of the inorganic solidifying agent. With the extension of time, the solidifying agent components gradually penetrate into the concrete and react with calcium hydroxide in the concrete to form a calcium silicate hydrate network, so the strength of the concrete of each component is improved with time, but the inorganic solidifying agent has a smaller improvement range, only 11.8-12.3 MPa after 14 days. In the solidifying agent of examples 1-3, the penetration agent is added to effectively promote the penetration of the solidifying agent components into the concrete, and the penetration depth of the concrete is much greater than that of the inorganic solidifying agent. Therefore, it can be seen that the concrete strength of the solidifying agent of examples 1-3 is greater than that of the inorganic solidifying agent after 14 days, and the concrete strength of example 1 is the greatest, which is 17.2 MPa. This shows that the concrete solidifying agent provided by the present application can significantly improve the compressive strength of the concrete.

[0113] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A multifunctional concrete curing agent, characterized in that: The raw materials include the following weight parts: Curing agent component 20-35 parts; Functional component 15-25 parts; Deionized water 40-60 parts; The functional component includes auxiliary agent, surfactant and defoaming agent, the auxiliary agent includes wetting agent, dispersant, thickening agent, waterproof agent and efflorescence inhibitor; The curing agent component is one or more combinations of magnesium fluosilicate, zinc fluosilicate, sodium silicate and potassium silicate; the defoaming agent is one or more combinations of ethylene glycol siloxane, polydimethylsiloxane, polyoxypropylene ethylene oxide glycerol ether, polyoxyethylene ether, polyoxyethylene and polypropylene pentaerythritol ether; the wetting agent is one or more combinations of polyether modified polysiloxane, isomer decanol ether and polypropylene glycol; the dispersant is one or more combinations of sodium polyphosphate, sodium polyacrylate, sodium citrate and polyethylene glycol; the polyethylene glycol is one of polyethylene glycol 200 or polyethylene glycol 400; the efflorescence inhibitor is one or more combinations of thio-bis ethanol, sodium borohydride, zinc oxide, sodium sulfite and carbonyl diamine; the thickening agent is one or more combinations of polyacrylamide, sodium polyacrylate, polyoxyethylene and polyvinylpyrrolidone; the waterproof agent is one or more combinations of n-octyl triethoxysilane, isobutyl triethoxysilane, sodium methylsilanol, potassium methylsilanol, sodium methylsilicate and potassium methylsilicate; the surfactant is one or more combinations of fluorocarbon, siloxane, sodium dodecyl sulfonate and alkyl phenol polyoxyethylene ether.

2. The multifunctional concrete solidifying agent according to claim 1, wherein The raw materials include the following weight parts: Curing agent component 20-35 parts; Deionized water 40-60 parts; Wetting agent 1.5-2 parts; Defoaming agent 0.5-2 parts; Dispersant 2-6 parts; Thickening agent 0.5-1 part; Waterproof agent 5-8 parts; Surfactant 1-2 parts; Efflorescence inhibitor 2-6 parts.

3. A method for producing the multifunctional concrete solidifying agent according to any one of claims 1 or 2, characterized by, The steps include the following: Step A1: weigh 20-35 parts by weight of the curing agent component, dry at 50-80℃, and obtain the dried material; Step A2: add the dried material into a stirred tank and add 40-60 parts by weight of deionized water, stir at a speed of 500-1000r / min for 1-1.5h to obtain a curing agent component solution; Step B1: add the wetting agent into a reaction kettle, stir at a speed of 250-350r / min and a temperature of 26℃, then add the waterproof agent, dispersant, thickening agent and efflorescence inhibitor in sequence after stirring for 10-15min, and stir at a speed of 350-500r / min, until the mixture is uniform, then obtain an auxiliary agent solution; Step B2: mix the curing agent component solution and the auxiliary agent solution, stir at a speed of 800-100r / min, add the surfactant, and stir at 40-60℃ for 15-30min to completely mix the solution, then add the defoaming agent and stir for 1.5-2h, filter the obtained solution to remove insoluble substances, and finally obtain a multifunctional concrete curing agent.

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