CN116514449A - A low-temperature early-strength coagulant for magnesite cementitious materials and its preparation method and use method - Google Patents

Abstract

The invention provides a low-temperature early-strength coagulant for a magnesite cementing material, a preparation method and a use method thereof, wherein the low-temperature early-strength coagulant consists of the following components in parts by weight: 1.2-4.5 parts of glacial acetic acid, 0.1-4.2 parts of sodium triflate, 1.2-4.0 parts of aluminum benzoate, 0.5-2.5 parts of dibenzylidene sorbitol, 1.5-3.0 parts of 4-ethoxy-4-oxobutanoic acid, 0.9-1.5 parts of polyvinylcyclohexane, 1.3-5.6 parts of amorphous sodium silicate, 2.2-4.5 parts of lauric diethanolamide, 1.1-3.3 parts of lauramidopropyl dimethyl tertiary amine, 0.5-1 part of organosilicon waterproofing agent, 20-35 parts of ethanol and 35-50 parts of water. After the external auxiliary agent serving as the cementing material is added, the setting time of magnesite slurry can be effectively shortened under the low-temperature condition, the early-stage and later-stage strength of the product is improved, the demolding time is shortened, the production efficiency is improved, the energy consumption is reduced, and the problem of halogen return is solved.

Description

A low-temperature early-strength coagulation accelerator for magnesite cementitious materials and its preparation method and use method

technical field

The invention belongs to the technical field of modifiers for magnesite gelling materials, and in particular relates to a low-temperature early-strength coagulation accelerator for magnesite gelling materials, a preparation method, and a use method.

Background technique

Cement is one of the most important materials in construction and road engineering. As an inorganic gelling material, it can solidify from a fluid slurry into a stone-like body with high mechanical strength through hydration reaction. Different from hydraulic cementing materials such as traditional Portland cement, iron-aluminate cement, and sulphoaluminate cement, magnesite cementing material, also known as magnesite cement, is an air-hardening cementing material. An air-hardening cementitious material that can hydrate in air and maintain strength development. Because of its excellent mechanical properties, fast setting speed, strong cohesive force, smooth and beautiful surface, flame retardant and heat insulation, it is widely used in construction engineering, traffic engineering, decorative materials and refractory products, etc., and is replacing steel, wood, etc. etc. have broad prospects. my country is the country with the most abundant magnesium resources in the world. At the same time, the production process of magnesite cement is relatively simple and the energy consumption of the production process is low. When preparing magnesium cement products, it can also be used together with industrial and agricultural waste such as plant straw, wood chips, fly ash, slag, and silica fume to recycle waste. However, this material can only react normally at a temperature of 20-35°C, and the reaction speed is slow below 15°C, the early strength is low, the demoulding time is long, and the curing period at room temperature is long. At present, in order to solve the demoulding problem, a greenhouse constant temperature and humidity maintenance scheme is adopted, which increases production costs and energy consumption. Therefore, the development of a low-temperature early-strength coagulant is a key problem that needs to be solved urgently in the development of magnesite cement.

The publication number is CN1477076A Chinese invention patent application discloses "preparation method of low-temperature early-strength coagulant for Lingmei gelling material", and its technical scheme is to use 25-35% NaOH solution, 15%-25% neutralizer, 20% -30% chlorinated acid and 20%-30% water are used as raw materials. The above-mentioned raw materials are measured according to percentages and then added to the reaction kettle, stirred at 80-95°C for 100-150 minutes, and then taken out and filled into cans. But its disadvantage is to increase the 1d intensity.

Contents of the invention

The invention provides a low-temperature early-strength coagulation accelerator for magnesite cementitious materials, a preparation method and a use method, so as to solve the above-mentioned technical problems.

Technical scheme of the present invention is realized like this:

A low-temperature early-strength coagulation accelerator for magnesite cementitious materials, consisting of the following components by weight:

Glacial acetic acid 1.2-4.5 parts, sodium trifluoromethanesulfonate 0.1-4.2 parts, aluminum benzoate 1.2-4.0 parts, dibenzylidene sorbitol 0.5-2.5 parts, 4-ethoxy-4-oxobutanoic acid 1.5- 3.0 parts, 0.9-1.5 parts of polyvinylcyclohexane, 1.3-5.6 parts of amorphous sodium silicate, 2.2-4.5 parts of lauric acid diethanolamide, 1.1-3.3 parts of lauryl amidopropyl dimethyl tertiary amine, organic 0.5-1 part of silicon waterproofing agent, 20-35 parts of ethanol, and 35-50 parts of water.

Further, the silicone waterproofing agent is any one of methyl silicic acid, sodium methyl silicate and potassium methyl silicate.

Further glacial acetic acid 2.5 parts, sodium triflate 3.5 parts, aluminum benzoate 3.0 parts, dibenzylidene sorbitol 1.7 parts, 4-ethoxy-4-oxobutanoic acid 1.6 parts, polyvinylcyclohexyl 1.2 parts of alkanes, 4.5 parts of amorphous sodium silicate, 3.0 parts of lauric acid diethanolamide, 2.3 parts of lauryl amidopropyl dimethyl tertiary amine, 0.7 parts of sodium methyl silicate, 30 parts of ethanol, and 46 parts of water.

Further: the organosilicon waterproofing agent is potassium methyl silicate, and the weight part of potassium methyl silicate is 0.5-0.7 parts.

A preparation method of a low-temperature early-strength coagulant for magnesite cementitious materials, comprising the following steps:

(1) According to the formula of the low-temperature early-strength coagulant for any of the above-mentioned magnesite gelling materials, weigh glacial acetic acid, sodium trifluoromethanesulfonate, aluminum benzoate, dibenzylidene sorbitol, and 4-ethylhexyl alcohol respectively. Oxy-4-oxobutanoic acid, polyvinylcyclohexane, amorphous sodium silicate, lauric acid diethanolamide, lauramidopropyldimethyl tertiary amine, silicone water repellent, ethanol and water.

(2) Add sodium trifluoromethanesulfonate, aluminum benzoate, dibenzylidene sorbitol, 4-ethoxy-4-oxobutanoic acid, and ethanol in the step (1) into the reaction kettle and mix evenly, start heating Stir until sodium trifluoromethanesulfonate, aluminum benzoate and dibenzylidene sorbitol are all dissolved, then slowly add glacial acetic acid and polyethylene in step (1) to the reaction kettle at a flow rate of 20mL/min with a constant flow pump. Cyclohexane, lauric acid diethanolamide, lauryl amidopropyl dimethyl tertiary amine, mixed and stirred evenly to obtain a mixed organic solution.

(3) Mix and stir the amorphous sodium silicate and water weighed in step (1) at 20-25°C to obtain a mixed aqueous solution, and slowly add the organosilicon weighed in step (1) to it under stirring conditions Waterproofing agent, after stirring, a uniform mixed aqueous solution is obtained.

(4) Mix the mixed organic solution obtained in the step (2) and the mixed aqueous solution obtained in the step (3) at 20-25° C., and obtain the coagulant for magnesite cement material after stirring evenly.

Further, in step (2), sodium trifluoromethanesulfonate, aluminum benzoate, dibenzylidene sorbitol, 4-ethoxy-4-oxobutanoic acid and ethanol are mixed and stirred at a temperature of 28-32 ° C, and the temperature is kept Under constant conditions, use a constant flow pump to sequentially add glacial acetic acid, polyvinylcyclohexane, lauric acid diethanolamide, and lauryl amidopropyl dimethyl tertiary amine at a flow rate of 20 mL/min, and then mix and stir for 60- 90 minutes.

The invention also discloses a method for using a low-temperature early-strength coagulant accelerator for magnesite cementitious materials, specifically: the addition amount of the low-temperature early-strength coagulant accelerator is 0.5wt of magnesite cementitious material (magnesite cement raw material) % - 1.5 wt%. .

As a further technical solution of the above method of use: the low-temperature early-strength coagulant accelerator for magnesite cementitious materials is added to the magnesite slurry at a flow rate of 40-60mL/min with a constant flow pump and mixed evenly for use.

Compared with the prior art, the working principle and beneficial effects of the present invention are:

1. In the technical scheme of the present invention, research surface is in the magnesite cementitious material reaction process, and initial MgO is dissolved in the conditioner solution and reacts to generate Mg(OH) 2 and begin to dissociate gradually, while Mgcl ₂ ionization occurs in the liquid, Produce hydrated magnesium oxychloride cation complex, OH ^- and cl ^- plasma. During this process, the compounding of glacial acetic acid and sodium trifluoromethanesulfonate can effectively trigger the formation of magnesium oxychloride cation complex. Under this condition The dissolution and hydrolysis reactions continued. Followed by the crystallization stage, after the continuation of dissolution and hydrolysis makes the concentration of the solution reach a certain level, the magnesium oxychloride hydrate cation complex will be dissolved in aluminum benzoate, dibenzylidene sorbitol, 4-ethoxyl-4-oxo A condensation reaction occurs under the co-initiation of butyric acid, and colloidal particles of the product phase (5.1.8 phase (5Mg(OH)2.Mgcl ₂ .8H2O) and (3Mg(OH)2.Mgcl ₂ .8H2O) are formed and heat is released. This The process will consume a large amount of free water, making the magnesium cement slurry lose its fluidity and become gelatinous, and gradually precipitate fibrous crystals. Lauric acid diethanolamide and lauryl amidopropyl dimethyl tertiary amine accelerate crystal formation, optimize The crystal overlap structure, the crystals are interlaced and filled between the unhydrated particles, and finally generate 3-phase and 5-phase dense packing, which makes the slurry harden and the strength continues to grow and harden.

2. In the technical solution of the present invention, after the silicone waterproofing agent is mixed into the magnesite slurry, the hydrophilic group faces the magnesite cement, while the hydrophobic group is evenly arranged around the pores, forming a hydrophobic "city wall" to prevent Moisture infiltrates, and at the same time forms a stable complex with cations such as magnesium and calcium in magnesite cement, making the needle-shaped 518 crystal phase change smaller, and the waterproofing agent and magnesite cement are more closely combined, reducing the corrosion damage of water function, increase the water resistance of the product, and form a layer of colorless, transparent, anti-ultraviolet breathable film on the surface of the magnesite product that is invisible to the naked eye. When rainwater hits it or encounters humid air, the water droplets will flow naturally to prevent moisture Intrusion, which has a certain inhibitory effect on the later halogen return of magnesite cementitious materials. Water and ethanol are used as the medium to promote the uniform dispersion of raw materials in the medium to form a uniform and stable mixed solution. Adding sodium silicate at the end can increase the viscosity of the mixture to a limited extent, which is convenient for later production, transportation and use, and can be stored at room temperature.

3. The process has strong environmental friendliness, mild reaction temperature, no waste, low cost and high promotion value.

Detailed ways

The following examples are used to illustrate the present invention, but are not used to limit the scope of the present invention. Without departing from the spirit and essence of the present invention, the modifications and replacements made to the steps, methods or conditions of the present invention all belong to the present invention. scope.

Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

The low-temperature early-strength coagulant for magnesite cementitious material provided by the invention and preparation method thereof, specific examples are as follows:

Example 1

(1) Weigh 2.5 parts of glacial acetic acid, 3.5 parts of sodium trifluoromethanesulfonate, 3.0 parts of aluminum benzoate, 1.7 parts of dibenzylidene sorbitol, 1.6 parts of 4-ethoxy-4-oxobutanoic acid, polyethylene 1.2 parts of cyclohexane, 4.5 parts of amorphous sodium silicate, 3.0 parts of lauric acid diethanolamide, 2.3 parts of lauryl amidopropyl dimethyl tertiary amine, 0.7 parts of sodium methyl silicate, 30 parts of ethanol, 46 parts of water share.

(2) Sodium trifluoromethanesulfonate, aluminum benzoate, dibenzylidene sorbitol, 4-ethoxy-4-oxobutanoic acid and ethanol in step (1) are added to the reaction kettle and mixed uniformly, heated to Stir at 30°C until all the solids are dissolved, then slowly add glacial acetic acid, polyvinylcyclohexane, and dilauric acid to the reaction kettle at a flow rate of 20mL/min with a constant flow pump. Ethanolamide and lauryl amidopropyl dimethyl tertiary amine were mixed and stirred for 60 minutes to obtain a mixed organic solution.

(3) Mix and stir the amorphous sodium silicate and water weighed in step (1) at a preferred 20°C (the mixing and stirring temperature can also be 25°C, 23°C, etc., as long as it is between 20°C and 25°C ) to obtain a mixed aqueous solution, and add the organosilicon waterproofing agent weighed in step (1) with a constant flow pump at a flow rate of 20mL/min under stirring conditions, and obtain a uniform mixed aqueous solution after stirring.

(4) Mix the mixed organic solution obtained in step (2) and the mixed aqueous solution obtained in step (3) at 25°C (the mixing and stirring temperature can also be 20°C, 23°C, etc. time), after stirring evenly, the coagulant for magnesite cement material can be obtained.

Example 2

Weigh 2.0 parts of glacial acetic acid, 4.0 parts of sodium trifluoromethanesulfonate, 1.5 parts of aluminum benzoate, 1.5 parts of dibenzylidene sorbitol, 3.0 parts of 4-ethoxy-4-oxobutanoic acid, polyvinylcyclohexyl 1.0 parts of alkane, 5.0 parts of amorphous sodium silicate, 4.2 parts of lauric acid diethanolamide, 3.3 parts of lauryl amidopropyl dimethyl tertiary amine, 1.0 parts of potassium methyl silicate, 30.5 parts of ethanol, 43 parts of water, others Step is the same as embodiment one.

Example 3

Weigh 1.2 parts of glacial acetic acid, 4.2 parts of sodium trifluoromethanesulfonate, 1.6 parts of aluminum benzoate, 2.5 parts of dibenzylidene sorbitol, 1.5 parts of 4-ethoxy-4-oxobutanoic acid, polyvinylcyclohexyl 1.5 parts of alkane, 4.5 parts of amorphous sodium silicate, 2.2 parts of lauric acid diethanolamide, 3.3 parts of lauryl amidopropyl dimethyl tertiary amine, 0.5 parts of silicone water repellent, 35 parts of ethanol, 42 parts of water, preparation method Other steps are the same as in Embodiment 1.

For above embodiment 1-3 is used in the production of magnesite product of the present invention respectively, is application example 1-3 respectively, and in this application example, above-mentioned magnesite product modifying agent add-on is specifically shown in following table 1 shown.

Among them, the application method (take the magnesium oxychloride door core board flat mold production, 10 ℃ room temperature as an example) is:

Raw material ratio: 100kg of lightly burned magnesium oxide powder (activity 65), 110kg of magnesium chloride solution (30°Bé), 1.5kg of fiber (pp short fiber), foaming agent (composite foaming agent): 0.7kg, foaming liquid ( Foaming agent: water = 1:80), and the low-temperature early-strength coagulant is added according to the ratio in the table below.

Production process: Prepare the magnesium chloride solution one day in advance, and measure the amount of light-burned magnesium oxide powder, magnesium chloride solution, fiber, foaming agent, water for diluting the foaming agent, and low-temperature early-strength coagulant according to the production formula and the capacity of the mixer. Add water for diluting the foaming agent to the weighed foaming agent to prepare a foaming liquid. Put the measured light-burned magnesia powder, magnesium chloride solution, and fiber into the mixer in turn, stir evenly at high speed, and prepare magnesium oxychloride cement slurry (magnesite cement slurry, including magnesium oxychloride, magnesium oxysulfide, sulfur-chloride compound, phosphoric acid Magnesium these 4 kinds, among them magnesium phosphate reacts very quickly and does not need coagulation accelerator, the rest needs to add coagulation accelerator, and the strength of magnesium oxychloride is the best.), magnesium oxychloride slurry is composed of magnesium chloride solution and light-burned magnesium oxide powder; The addition of low-temperature early-strength coagulant is 0.5wt%-1.5wt% of magnesite cementitious material (magnesite cement raw material), adds low-temperature early-strength coagulant in this ratio in magnesite cement slurry, and uses Add the constant flow pump at a flow rate of 40-60mL/min, stir evenly, start the foaming machine, foam the foaming liquid through the foaming machine, add the foam into the mixer and mix thoroughly to form a uniform slurry, and prepare The slurry is fed into the molding machine or mold, and the template is ferried to the maintenance area with the ferry car after the surface is scraped. After curing, open the mold and take off the board.

The coagulation-accelerating effects and performance parameters of Implementation Case 1, Implementation Case 2, and Implementation Case 3 are shown in Table 1.

Table 1: The amount of coagulant accelerator, coagulation accelerator effect and performance parameters in the application examples

It can be seen from the data in Table 1 that the coagulants of Example 1, Example 2 and Example 3 all have good coagulation accelerating effects when applied to magnesium oxysulfate cement products, and also have excellent early and late strengths performance, resistance to halogen reversion, and easy industrial production.

The low-temperature early-strength coagulant for magnesite cementitious material provided by the invention and preparation method, specific embodiment except above-mentioned embodiment 1～3, also has following embodiment:

Example 4

Weigh 4.5 parts of glacial acetic acid, 0.3 parts of sodium trifluoromethanesulfonate, 1.5 parts of aluminum benzoate, 1.5 parts of dibenzylidene sorbitol, 2 parts of 4-ethoxy-4-oxobutanoic acid, polyvinylcyclohexyl 1.1 parts of alkane, 2.7 parts of amorphous sodium silicate, 2.5 parts of lauric acid diethanolamide, 2.3 parts of lauryl amidopropyl dimethyl tertiary amine, 0.6 parts of silicone waterproofing agent, 30 parts of ethanol, and 40 parts of water. The other steps of the preparation method are the same as in Example 1.

Example 5

Weigh 1.5 parts of glacial acetic acid, 0.1 part of sodium trifluoromethanesulfonate, 2 parts of aluminum benzoate, 1 part of dibenzylidene sorbitol, 2.5 parts of 4-ethoxy-4-oxobutanoic acid, polyvinylcyclohexyl 1.2 parts of alkane, 4.8 parts of amorphous sodium silicate, 3 parts of lauric acid diethanolamide, 1.9 parts of lauryl amidopropyl dimethyl tertiary amine, 0.7 parts of silicone waterproofing agent, 25 parts of ethanol, and 38 parts of water. The other steps of the preparation method are the same as in Example 1.

Example 6

Weigh 2 parts of glacial acetic acid, 0.9 parts of sodium trifluoromethanesulfonate, 1.2 parts of aluminum benzoate, 0.9 parts of dibenzylidene sorbitol, 2.8 parts of 4-ethoxy-4-oxobutanoic acid, polyvinylcyclohexyl 1 part of alkane, 1.9 parts of amorphous sodium silicate, 3.5 parts of lauric acid diethanolamide, 2.1 parts of lauryl amidopropyl dimethyl tertiary amine, 0.9 parts of silicone waterproofing agent, 21 parts of ethanol, and 39 parts of water. The other steps of the preparation method are the same as in Example 1.

Example 7

Weigh 2.6 parts of glacial acetic acid, 1.6 parts of sodium trifluoromethanesulfonate, 4.0 parts of aluminum benzoate, 1.3 parts of dibenzylidene sorbitol, 2.1 parts of 4-ethoxy-4-oxobutanoic acid, polyvinylcyclohexyl 1.3 parts of alkane, 4.6 parts of amorphous sodium silicate, 3.8 parts of lauric acid diethanolamide, 3.2 parts of lauryl amidopropyl dimethyl tertiary amine, 0.9 parts of silicone waterproofing agent, 32 parts of ethanol, and 46 parts of water. The other steps of the preparation method are the same as in Example 1.

Example 8

Weigh 4.3 parts of glacial acetic acid, 4.1 parts of sodium trifluoromethanesulfonate, 3.9 parts of aluminum benzoate, 0.5 parts of dibenzylidene sorbitol, 2.8 parts of 4-ethoxy-4-oxobutanoic acid, polyvinylcyclohexyl 1.4 parts of alkane, 5.5 parts of amorphous sodium silicate, 2.3 parts of lauric acid diethanolamide, 3.2 parts of lauryl amidopropyl dimethyl tertiary amine, 0.9 parts of silicone waterproofing agent, 33 parts of ethanol, and 41 parts of water. The other steps of the preparation method are the same as in Example 1.

Example 9

Weigh 3.9 parts of glacial acetic acid, 3.2 parts of sodium trifluoromethanesulfonate, 2.5 parts of aluminum benzoate, 2.5 parts of dibenzylidene sorbitol, 2.6 parts of 4-ethoxy-4-oxobutanoic acid, polyvinylcyclohexyl 1.3 parts of alkane, 4.5 parts of amorphous sodium silicate, 3.2 parts of lauric acid diethanolamide, 2.3 parts of lauryl amidopropyl dimethyl tertiary amine, 0.8 parts of silicone waterproofing agent, 31 parts of ethanol, and 42 parts of water. The other steps of the preparation method are the same as in Example 1.

Example 10

Weigh 1.3 parts of glacial acetic acid, 0.2 parts of sodium trifluoromethanesulfonate, 1.3 parts of aluminum benzoate, 0.6 parts of dibenzylidene sorbitol, 3.0 parts of 4-ethoxy-4-oxobutanoic acid, polyvinylcyclohexyl 1 part of alkane, 1.4 parts of amorphous sodium silicate, 4.4 parts of lauric acid diethanolamide, 1.2 parts of lauryl amidopropyl dimethyl tertiary amine, 0.9 parts of silicone waterproofing agent, 27 parts of ethanol, and 46 parts of water. The other steps of the preparation method are the same as in Example 1.

Example 11

Weigh 4 parts of glacial acetic acid, 2.8 parts of sodium trifluoromethanesulfonate, 1.5 parts of aluminum benzoate, 1.4 parts of dibenzylidene sorbitol, 1.7 parts of 4-ethoxy-4-oxobutanoic acid, polyvinylcyclohexyl 0.9 parts of alkane, 1.3 parts of amorphous sodium silicate, 2.5 parts of lauric acid diethanolamide, 1.4 parts of lauryl amidopropyl dimethyl tertiary amine, 0.6 parts of silicone waterproofing agent, 29 parts of ethanol, and 35 parts of water. The other steps of the preparation method are the same as in Example 1.

Example 12

Weigh 1.9 parts of glacial acetic acid, 4 parts of sodium trifluoromethanesulfonate, 3.8 parts of aluminum benzoate, 0.6 parts of dibenzylidene sorbitol, 1.9 parts of 4-ethoxy-4-oxobutanoic acid, polyvinylcyclohexyl 1.2 parts of alkane, 5.6 parts of amorphous sodium silicate, 4.5 parts of lauric acid diethanolamide, 1.1 parts of lauryl amidopropyl dimethyl tertiary amine, 0.9 parts of silicone waterproofing agent, 33 parts of ethanol, and 50 parts of water. The other steps of the preparation method are the same as in Example 1.

The low-temperature early-strength coagulant for the magnesite cementitious material prepared by the above-described embodiment can also solve the technical problems described in the prior art, and the dry density and anti-halogenation resistance after use are the same as those in Table 1. The reversion resistance was the same.

When using it specifically:

Example 4, dosage 1.4%, demoulding time 380min, 28-day flexural strength 0.48, 28-day compressive strength 0.76;

Example 5, dosage 0.6%, demoulding time 610min, 28-day flexural strength 0.38, 28-day compressive strength 0.63;

Example 6, dosage 0.7%, demoulding time 570min, 28-day flexural strength 0.40, 28-day compressive strength 0.67;

Example 7, dosage 0.8%, demoulding time 550min, 28-day flexural strength 0.39, 28-day compressive strength 0.71;

Example 8, dosage 0.9%, demoulding time 535min, 28-day flexural strength 0.44, 28-day compressive strength 0.73;

Example 9, dosage 1.0%, demoulding time 493min, 28-day flexural strength 0.43, 28-day compressive strength 0.72;

Example 10, dosage 1.1%, demoulding time 490min, 28-day flexural strength 0.39, 28-day compressive strength 0.71;

Example 11, dosage 1.2%, demoulding time 450min, 28-day flexural strength 0.40, 28-day compressive strength 0.70;

Example 12, the dosage is 1.3%, the demoulding time is 505min, the 28-day flexural strength is 0.40, and the 28-day compressive strength is 0.77.

The above are only preferred embodiments of the present invention, and do not limit the present invention. For those skilled in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and not possible to illustrate all embodiments here. However, the obvious changes or changes derived from this solution are still within the protection scope of the present invention.

Claims (8)

1. a low-temperature early-strength coagulant for magnesite cementitious material, is characterized in that: be made up of the component of following weight part: Glacial acetic acid 1.2-4.5 parts, sodium trifluoromethanesulfonate 0.1-4.2 parts, aluminum benzoate 1.2-4.0 parts, dibenzylidene sorbitol 0.5-2.5 parts, 4-ethoxy-4-oxobutanoic acid 1.5- 3.0 parts, 0.9-1.5 parts of polyvinylcyclohexane, 1.3-5.6 parts of amorphous sodium silicate, 2.2-4.5 parts of lauric acid diethanolamide, 1.1-3.3 parts of lauryl amidopropyl dimethyl tertiary amine, organic 0.5-1 part of silicon waterproofing agent, 20-35 parts of ethanol, and 35-50 parts of water. 2. The low-temperature early-strength coagulant for a kind of magnesite cementitious material according to claim 1, is characterized in that: described organosilicon waterproofing agent is methyl silicic acid, methyl sodium silicate, methyl silicon Any of the potassium phosphates. 3. a kind of magnesite cementitious material according to claim 2 is characterized in that, is made up of the component of following weight part: Glacial acetic acid 2.5 parts, sodium trifluoromethanesulfonate 3.5 parts, aluminum benzoate 3.0 parts, dibenzylidene sorbitol 1.7 parts, 4-ethoxy-4-oxobutanoic acid 1.6 parts, polyvinylcyclohexane 1.2 parts 4.5 parts of amorphous sodium silicate, 3.0 parts of lauric acid diethanolamide, 2.3 parts of lauryl amidopropyl dimethyl tertiary amine, 0.7 parts of sodium methyl silicate, 30 parts of ethanol, and 46 parts of water. 4. a kind of magnesite cementitious material according to claim 2 is characterized in that: described organic silicon waterproofing agent is potassium methyl silicate, and the weight part of potassium methyl silicate is 0.5-0.7 parts. 5. a preparation method of low-temperature early-strength coagulant for magnesite cementitious material, is characterized in that, comprises the following steps: (1) According to the formula described in any one of claims 1-4, take respectively glacial acetic acid, sodium trifluoromethanesulfonate, aluminum benzoate, dibenzylidene sorbitol, 4-ethoxy-4-oxo Butyric Acid, Polyvinylcyclohexane, Amorphous Sodium Silicate, Diethanolamide Laurate, Lauramidopropyldimethyl Tertiary Ammonium, Silicone Water Repellent, Ethanol and Water; (2) Add sodium trifluoromethanesulfonate, aluminum benzoate, dibenzylidene sorbitol, 4-ethoxy-4-oxobutanoic acid, and ethanol in the step (1) into the reaction kettle and mix evenly, start heating (Heating after mixing) Stir until sodium trifluoromethanesulfonate, aluminum benzoate, and dibenzylidene sorbitol are all dissolved, then add the ice in step (1) to the reaction kettle successively with a constant flow pump at a flow rate of 20mL/min Acetic acid, polyvinylcyclohexane, lauric acid diethanolamide, lauryl amidopropyl dimethyl tertiary amine, mixed and stirred evenly to obtain a mixed organic solution; (3) Mix and stir the amorphous sodium silicate and water weighed in step (1) at room temperature (20-25° C.) to obtain a mixed aqueous solution, and add the sodium silicate weighed in step (1) to it under stirring conditions. Silicone waterproofing agent, after stirring, a uniform mixed aqueous solution is obtained; (4) Mix the mixed organic solution obtained in the step (2) and the mixed aqueous solution obtained in the step (3) at normal temperature (20-25° C.), and stir evenly to obtain a coagulant for magnesite cement material. 6. the preparation method of a kind of magnesite cementitious material according to claim 5 is characterized in that, sodium trifluoromethanesulfonate, aluminum benzoate, dibenzylidene in step (2) Sorbitol, 4-ethoxy-4-oxobutanoic acid and ethanol were mixed and stirred at a temperature of 28-32°C, and the glacial acetic acid, poly Vinyl cyclohexane, lauric acid diethanolamide, lauryl amidopropyl dimethyl tertiary amine, then mixed and stirred for 60-90 minutes. 7. the using method of a kind of magnesite cementitious material according to claim 1 is characterized in that: the addition of low temperature early strength coagulant is magnesite cementitious material (i.e. magnesite 0.5wt%-1.5wt% of cement raw material). 8. the using method of a kind of low-temperature early-strength coagulant for magnesite cementitious material according to claim 7 is characterized in that: the low-temperature early-strength coagulant for magnesite cementitious material uses constant flow pump with 40- Add magnesite slurry at a flow rate of 60mL/min and mix evenly for use.