High-efficiency concrete release agent, preparation method and construction method

Abstract

This invention discloses a high-efficiency concrete release agent, its preparation method, and its construction method, belonging to the field of concrete construction. By weight, it comprises 30-50 parts of a base isolation component; 15-25 parts of an environmentally friendly modifying agent; 8-15 parts of a synergistic lubricating component; 5-10 parts of a foam-stabilizing film-forming component; and 20-35 parts of deionized water. This invention features a unique "internal admixture + external spraying" dual-effect release system. The internal admixture reduces the adhesion between the concrete and the formwork interface, while the external spraying, adapted to release machines, allows for rapid film formation through atomization, resisting the erosion caused by concrete pouring. This dual synergy achieves efficient and non-destructive release. The additives in this invention are environmentally friendly, non-toxic, and free of oil pollution, without affecting the mechanical properties of concrete or subsequent construction. They offer high release efficiency, wide applicability, and effectively solve the industry problems of traditional release materials such as adhesion, pollution, and poor mechanization compatibility.

Description

Technical Field

[0001] This invention belongs to the field of concrete engineering construction technology, specifically relating to a high-efficiency concrete release agent, its preparation method, and its construction method. Background Technology

[0002] Demolding is a crucial step in concrete construction, directly impacting the appearance quality, structural integrity, and construction efficiency of concrete components. Currently, concrete demolding primarily relies on applying release agents to the formwork or adding simple release materials to the concrete, combined with manual labor or simple demolding equipment.

[0003] Existing demolding methods have many drawbacks:

[0004] (1) Traditional release agents are mostly oily materials such as engine oil and diesel oil, which are not environmentally friendly and easily pollute the concrete surface, affecting subsequent decoration construction. They are also not compatible with precast concrete components and cast-in-place concrete structure templates. When mechanically sprayed, uneven spraying and poor film formation are likely to occur. Although some water-based release agents are environmentally friendly, their isolation performance is weak, and they are still prone to sticking, corner peeling and other phenomena when demolding.

[0005] (2) The release materials added to concrete are mostly single talc powder, fly ash, etc., which can only slightly reduce the interfacial adhesion and cannot form a synergistic effect with the release agent on the formwork surface. The release effect is limited, and excessive addition will affect the core properties of concrete such as strength.

[0006] (3) Existing release agents are not optimized for concrete components and cast-in-place concrete structure formwork operation characteristics. They have insufficient fluidity, film forming speed and erosion resistance. During mechanized demolding, the release agent is easily consumed and the release film is damaged, resulting in local sticking to the formwork. Secondary repairs are required, which greatly reduces construction efficiency and increases construction costs.

[0007] Therefore, developing a release agent that is compatible with precast concrete components and cast-in-place concrete structure formwork, has both internal and external additive functions, is environmentally friendly and efficient, and does not affect the performance of concrete has become an urgent technical problem to be solved in this field. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a high-efficiency concrete release agent, its preparation method, and its construction method, thereby solving the problems of poor environmental performance, insufficient compatibility with concrete components and cast-in-place concrete structure formwork, limited effectiveness of internal admixtures, and easy adhesion to formwork that damages concrete components.

[0009] The technical solution adopted in this invention is as follows:

[0010] In a first aspect, the present invention provides a high-efficiency concrete release agent, comprising the following components by weight:

[0011] Basic isolation components: 30-50 parts;

[0012] 15-25 parts of environmentally friendly modifying additives;

[0013] 8-15 parts of synergistic lubricating component;

[0014] 5-10 parts of foam-stabilizing film-forming component;

[0015] 20-35 parts deionized water;

[0016] The basic isolation component includes modified vegetable oil and light calcium carbonate in a mass ratio of 2:1; the environmentally friendly modifying agent includes sodium dodecylbenzenesulfonate and triethanolamine in a mass ratio of 3:2; the synergistic lubricating component includes calcium stearate and talc in a mass ratio of 1:1; and the foam-stabilizing film-forming component includes hydroxypropyl methylcellulose and polydimethylsiloxane in a mass ratio of 2:1.

[0017] Furthermore, by weight, it includes the following components:

[0018] 40 portions of basic isolation components;

[0019] 20 parts of environmentally friendly modifying additives;

[0020] 12 parts of synergistic lubricating component;

[0021] 8 parts of foam-stabilizing film-forming component;

[0022] 30 parts deionized water.

[0023] Secondly, the present invention provides a method for preparing a high-efficiency concrete release agent, the method comprising the following steps:

[0024] Step S1: Add deionized water to the reactor, heat to 40~50℃, add environmentally friendly modifying agent, and stir at 300~400r / min for 10~15min until completely dissolved;

[0025] Step S2: Add the basic isolation component and the synergistic lubricating component, keep the temperature constant, increase the stirring speed to 500~600 r / min and stir for 20~25 min until the material is evenly dispersed;

[0026] Step S3: Add the foam-stabilizing film-forming component, cool to room temperature, and stir at 200~300r / min for 15~20min to obtain the high-efficiency concrete release agent.

[0027] Thirdly, the present invention provides a construction method for a high-efficiency concrete release agent, used for construction based on the aforementioned high-efficiency concrete release agent, the construction method comprising the following steps:

[0028] Step S1: Add high-efficiency concrete release agent at 0.8%~1.2% of the mass of concrete cementitious materials, and extend the concrete mixing time by 2~3 minutes to ensure that the high-efficiency concrete release agent is evenly dispersed.

[0029] Step S2: Clean the surface of the concrete formwork and keep the concrete formwork dry and clean;

[0030] Step S3: Add the high-efficiency concrete release agent to the storage tank of the release machine, adjust the spraying pressure to 0.3~0.5MPa, and use atomized spraying to evenly spray the high-efficiency concrete release agent on the inside of the concrete formwork. The spraying amount is controlled at 80~120g / ㎡. After spraying, let it stand for 5~10 minutes until the high-efficiency concrete release agent forms a complete release film.

[0031] Step S4: Inside the spliced ​​concrete formwork coated with high-efficiency concrete release agent, pour the concrete mixed with high-efficiency concrete release agent from step S1. Once the concrete reaches the designed demolding strength, start the demolding machine for mechanized demolding.

[0032] The high-efficiency concrete release agent, its preparation method, and its construction method provided by this invention have the following advantages:

[0033] This invention uses modified vegetable oil compounded with lightweight calcium carbonate as the core release agent, combined with sodium dodecylbenzenesulfonate-triethanolamine compound emulsifying rust inhibitors, calcium stearate-talc compound synergistic lubricating components, and hydroxypropyl methylcellulose-polydimethylsiloxane compound foam stabilizing film-forming components. It features a unique "internal admixture + external spraying" dual-effect release system. The internal admixture reduces the adhesion between concrete and formwork, while the external spraying, adapted to release machines, atomizes and rapidly forms a film, resistant to concrete pouring erosion. This dual synergy achieves efficient and non-destructive release. The additives in this invention are environmentally friendly, non-toxic, and produce no oil pollution, do not affect the mechanical properties of concrete or subsequent construction, offer high release efficiency, and are applicable to a wide range of scenarios, effectively solving the industry problems of traditional release materials such as adhesion, pollution, and poor mechanization compatibility. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 The flowchart illustrates the preparation method of the high-efficiency concrete release agent provided by this invention. Detailed Implementation

[0036] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the invention.

[0037] This invention provides a high-efficiency concrete release agent, its preparation method, and its construction method. Specifically, it relates to a high-efficiency concrete release agent, its preparation method, and its construction method that are suitable for precast concrete components and cast-in-place concrete structure formwork. It is particularly suitable for mechanized demolding construction of precast concrete components and cast-in-place concrete structures, and can effectively solve technical problems such as concrete adhesion to concrete formwork, damage to concrete components during demolding, and low demolding efficiency.

[0038] The high-efficiency concrete release agent of this invention can be added internally to concrete or sprayed onto the surface of concrete formwork in conjunction with concrete components or cast-in-place concrete structural formwork to form a dual isolation system, achieving efficient and non-destructive demolding without affecting the mechanical properties of concrete or the environmental friendliness of construction. This invention can solve the technical pain points of existing concrete release materials, such as poor environmental friendliness, insufficient compatibility with mechanized demolding equipment, the inability of internal addition and external spraying to synergistically enhance demolding, easy sticking to the formwork and damaging components, and affecting the performance of concrete.

[0039] The high-efficiency concrete release agent of the present invention comprises, by weight, the following components: 30-50 parts of a basic isolation component; 15-25 parts of an environmentally friendly modifying agent; 8-15 parts of a synergistic lubricating component; 5-10 parts of a foam-stabilizing film-forming component; and 20-35 parts of deionized water. The basic isolation component comprises modified vegetable oil and light calcium carbonate in a mass ratio of 2:1; the environmentally friendly modifying agent comprises sodium dodecylbenzenesulfonate and triethanolamine in a mass ratio of 3:2; the synergistic lubricating component comprises calcium stearate and talc in a mass ratio of 1:1; and the foam-stabilizing film-forming component comprises hydroxypropyl methylcellulose and polydimethylsiloxane in a mass ratio of 2:1. As a preferred embodiment, the basic isolation component comprises 40 parts; the environmentally friendly modifying agent 20 parts; the synergistic lubricating component 12 parts; the foam-stabilizing film-forming component 8 parts; and the deionized water 30 parts.

[0040] Specifically, the basic isolation component is a mixture of modified vegetable oil and light calcium carbonate in a mass ratio of 2:1. The modified vegetable oil is a product of castor oil and soybean oil through esterification modification. It is non-toxic and environmentally friendly and has excellent isolation performance. The light calcium carbonate can fill the gap between the template and the concrete interface to enhance the isolation effect.

[0041] The environmentally friendly modifying agent is a compound of sodium dodecylbenzenesulfonate and triethanolamine in a mass ratio of 3:2. It has the functions of emulsification, dispersion and rust prevention, which can improve the stability of the agent, protect the steel formwork from corrosion and not contaminate the concrete surface.

[0042] The synergistic lubricating component is a compound of calcium stearate and talc powder in a mass ratio of 1:1. When added internally, it can reduce the interfacial friction between concrete particles and formwork. When sprayed externally, it can enhance the lubricity of the release film and adapt to the stress characteristics of mechanical demolding of concrete components and cast-in-place concrete structures.

[0043] The foam-stabilizing film-forming component is a compound of hydroxypropyl methylcellulose and polydimethylsiloxane in a mass ratio of 2:1, which can improve the fluidity of the additives and the film-forming speed, ensuring uniform film formation without bubbles during spraying, resistance to concrete pouring and erosion, and guaranteeing the integrity of the release film.

[0044] The preparation method of a high-efficiency concrete release agent includes the following steps:

[0045] Step S1: Add deionized water to the reactor, heat to 40~50℃, add environmentally friendly modifying agent, and stir at 300~400r / min for 10~15min until completely dissolved;

[0046] Step S2: Add the basic isolation component and the synergistic lubricating component, keep the temperature constant, increase the stirring speed to 500~600 r / min and stir for 20~25 min until the material is evenly dispersed;

[0047] Step S3: Add the foam-stabilizing film-forming component, cool to room temperature, and stir at 200~300r / min for 15~20min to obtain a high-efficiency concrete release agent suitable for concrete components and cast-in-place concrete structure formwork.

[0048] The application method for high-efficiency concrete release agent adopts a dual mode of internal admixture and external spraying, including the following steps:

[0049] Step S1, Internal Addition: Add high-efficiency concrete release agent at 0.8%~1.2% of the mass of concrete cementitious materials. Add the high-efficiency concrete release agent to the concrete mix and mix it together with cement, sand, gravel, water and other raw materials. Extend the concrete mixing time by 2~3 minutes compared with ordinary concrete to make the high-efficiency concrete release agent evenly dispersed and reduce the adhesion between the concrete and the formwork.

[0050] Step S2, formwork pretreatment: Clean the surface of the concrete formwork of debris and dust, and keep the concrete formwork dry and clean;

[0051] Step S3, Spraying: Add the high-efficiency concrete release agent to the storage tank of the release machine, adjust the spraying pressure to 0.3~0.5MPa, and use atomized spraying to evenly spray the high-efficiency concrete release agent on the inside of the concrete formwork. The spraying amount is controlled at 80~120g / ㎡. After spraying, let it stand for 5~10 minutes until the high-efficiency concrete release agent forms a complete release film.

[0052] Step S4, Pouring and Demolding: Inside the spliced ​​concrete formwork coated with high-efficiency concrete release agent, pour the concrete mixed with high-efficiency concrete release agent from step S1. Once the concrete reaches the design demolding strength (≥70% of the design strength for precast components and ≥80% of the design strength for cast-in-place components), start the demolding machine for mechanized demolding to achieve non-destructive and efficient demolding.

[0053] Therefore, this invention uses modified vegetable oil compounded with lightweight calcium carbonate as the core release agent, combined with sodium dodecylbenzenesulfonate-triethanolamine compounded emulsifying rust-inhibiting components, calcium stearate-talc compounded synergistic lubricating components, and hydroxypropyl methylcellulose-polydimethylsiloxane compounded foam-stabilizing film-forming components. It features a unique "internal admixture + external spraying" dual-effect release system. The internal admixture reduces the adhesion between the concrete and the formwork interface, while the external spraying is adapted to demolding machines for rapid film formation via atomization, resisting concrete pouring erosion. This dual synergy achieves efficient and non-destructive demolding. The additives in this invention are environmentally friendly, non-toxic, and produce no oil pollution, do not affect the mechanical properties of concrete or subsequent construction, have high demolding efficiency, and are applicable to a wide range of scenarios, effectively solving the industry problems of traditional demolding materials such as adhesion, pollution, and poor mechanization compatibility.

[0054] The following is a specific embodiment:

[0055] This embodiment provides a high-efficiency concrete release agent, which, by weight, includes the following components: 20 parts modified vegetable oil, 10 parts light calcium carbonate, 9 parts sodium dodecylbenzene sulfonate, 6 parts triethanolamine, 6 parts calcium stearate, 6 parts talc, 4 parts hydroxypropyl methylcellulose, 2 parts polydimethylsiloxane, and 28 parts deionized water.

[0056] Its preparation method is as follows:

[0057] Step S1: Add deionized water to the reactor, heat to 45°C, add environmentally friendly modifying agent, and stir at 350 r / min for 12 min until completely dissolved;

[0058] Step S2: Add the basic isolation component and the synergistic lubricating component, keep the temperature constant, increase the stirring speed to 550 r / min and stir for 23 min until the material is evenly dispersed;

[0059] Step S3: Add the foam-stabilizing film-forming component, cool to room temperature, and stir at 250 r / min for 18 min to obtain the high-efficiency concrete release agent.

[0060] Its construction method adopts a dual mode of internal admixture + external spraying, which is suitable for mechanized operations of concrete components and cast-in-place concrete structure formwork. The construction method includes the following steps:

[0061] Step S1, Internal Addition: Add high-efficiency concrete release agent at 1.0% of the mass of concrete cementitious materials, and extend the concrete mixing time by 3 minutes to ensure that the high-efficiency concrete release agent is evenly dispersed.

[0062] Step S2, formwork pretreatment: Clean the surface of the concrete formwork and keep the concrete formwork dry and clean;

[0063] Step S3, Spraying: Add the high-efficiency concrete release agent to the storage tank of the release machine, adjust the spraying pressure to 0.4MPa, and use atomized spraying to evenly spray the high-efficiency concrete release agent on the inside of the concrete formwork. The spraying amount is controlled at 100g / ㎡. After spraying, let it stand for 8 minutes to allow the high-efficiency concrete release agent to form a complete release film.

[0064] Step S4, Pouring and Demolding: Inside the spliced ​​concrete formwork coated with high-efficiency concrete release agent, pour the concrete mixed with high-efficiency concrete release agent from step S1. Once the concrete reaches the designed demolding strength, start the demolding machine for mechanized demolding.

[0065] Performance comparison tests were conducted on the above-mentioned concrete components after construction. The test basis and methods are as follows:

[0066] Test standards: JC / T 949-2021 "Release Agents for Concrete Products" and GB / T 50081 "Test Methods for Mechanical Properties of Concrete".

[0067] Test conditions: temperature 23±2℃, humidity 50±5%, steel formwork, C30 / C40 / C50 concrete.

[0068] Test methods: release force test (universal testing machine), adhesion test (weighing method), appearance inspection (visual inspection + roughness tester), environmental protection test (VOC analyzer).

[0069] The test results are detailed in Tables 1 to 6:

[0070] Table 1: Demolding Force

[0071] Types of release agents The dual-effect adjuvant of this invention Waste engine oil Common water-based release agent Single external spray release agent <![CDATA[Precast component (≥70% strength) (kN / m 2 )]]> 0.8～1.2 3.2～4.5 2.5～3.0 1.8～2.2 <![CDATA[Cast-in-place member (≥80% strength) (kN / m 2 )]]> 1.0～1.5 3.8～5.0 2.8～3.5 2.0～2.5

[0072] Table 2: Adhesion Rate and Concrete Adhesion Amount

[0073] Types of release agents The dual-effect adjuvant of this invention Waste engine oil Common water-based release agent Single external spray release agent <![CDATA[Adhesion amount (g / m 2 )]]> ≤2.0 8.0～12.0 4.0～6.0 3.0～4.0 Sticking Defect Rate 0% 25%～40% 10%～20% 5%～10%

[0074] Table 3: Appearance Quality of Concrete

[0075] index The dual-effect adjuvant of this invention Waste engine oil Common water-based release agent Surface bubble rate ≤1.0% 5%～8% 2%～4% Pockmarked, honeycomb none serious slight Color difference, oil stains No color difference, no oil stains Severe blackening and oil residue Slight color difference Surface smoothness Ra≤1.2μm Ra≥5.0μm Ra≥2.5μm

[0076] Table 4: Film Formation and Application Compatibility

[0077] index The dual-effect adjuvant of this invention Traditional release agents Atomized spray coating film formation time 5-8 min Waste engine oil: 15-20 min; ordinary water-based oil: 10-15 min Resistant to erosion during casting Complete film formation, without damage Easily washed away, isolation failure Mechanization adaptability 100% compatible with demolding machines Waste engine oil easily clogs the nozzle; ordinary water-based oils produce uneven film formation. Template residue No residue, rinses clean with water Oil buildup requires cleaning with a wire brush.

[0078] Table 5: Environmental Protection and Safety

[0079] index The dual-effect adjuvant of this invention Waste engine oil Common water-based release agent VOC content ≤30g / L >200g / L (exceeding the standard) 50~80g / L toxicity Non-toxic and non-irritating Toxic and carcinogenic risks Low toxicity Pollution No oil stains, no wastewater pollution Seriously polluted soil and water sources Slight pollution

[0080] Table 6: Impact on Concrete Performance

[0081] performance The dual-effect adjuvant of this invention Waste engine oil Common water-based release agent Compressive strength retention rate 98%～100% 85%～90% 92%～95% impermeability grade P12 (no decrease) P8 (Decline) P10 (slightly decreased) Secondary construction bond strength ≥0.9MPa <0.5MPa 0.6~0.8MPa

[0082] This invention provides a high-efficiency concrete release agent, its preparation method, and its construction method. Key advantages are summarized below:

[0083] Demolding efficiency: Demolding force is reduced by 60% to 70%, and mechanized demolding speed is increased by 40% to 50%.

[0084] Appearance quality: The bubble rate is reduced to ≤1%, there is no sticking to the mold and no color difference, meeting the standard of fair-faced concrete.

[0085] Environmentally friendly and safe: VOC≤30g / L, non-toxic and oil-free, meeting the requirements of green construction.

[0086] Performance compatibility: Concrete strength is retained at 98%+, without affecting secondary construction.

[0087] Economical and efficient: Overall costs are reduced by 30% to 50%, and the lifespan of concrete formwork is increased by more than 100%.

[0088] Mechanization compatibility: 100% compatible with demolding machines, fast atomization film formation, erosion resistant, suitable for assembly line operations.

[0089] This invention provides a high-efficiency concrete release agent, its preparation method, and its construction method, belonging to the field of concrete construction technology, and has the following advantages:

[0090] Addressing the technical pain points of existing concrete release materials, such as poor environmental performance, insufficient compatibility with mechanized release equipment, lack of synergistic effect between internal admixture and external spraying, and easy adhesion to the formwork, which damages components and affects concrete performance, this invention's release agent, by weight, includes 30-50 parts of basic isolation component, 15-25 parts of environmentally friendly modifying additive, 8-15 parts of synergistic lubricating component, 5-10 parts of foam stabilizing and film-forming component, and 20-35 parts of deionized water. It uses modified vegetable oil compounded with lightweight calcium carbonate as the core isolation substrate, combined with sodium dodecylbenzenesulfonate-triethanolamine compounded emulsifying rust-preventing component, calcium stearate-talc compounded synergistic lubricating component, and hydroxypropyl methylcellulose-polydimethylsiloxane compounded foam stabilizing and film-forming component. It features a unique "internal admixture + external spraying" dual-effect release system. The internal admixture reduces the adhesion between concrete and concrete formwork, while the external spraying is compatible with release machines for rapid film formation through atomized spraying, resisting concrete pouring erosion. This dual synergy achieves efficient and non-destructive release. The additive of this invention is environmentally friendly, non-toxic, and free of oil pollution. It does not affect the mechanical properties of concrete or subsequent construction. It has high demolding efficiency and wide applicability, effectively solving the industry problems of traditional demolding materials such as sticking, pollution, and poor mechanization adaptability.

[0091] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high-efficiency concrete release agent, characterized in that, By weight, it includes the following components: Basic isolation components: 30-50 parts; 15-25 parts of environmentally friendly modifying additives; 8-15 parts of synergistic lubricating component; 5-10 parts of foam-stabilizing film-forming component; 20-35 parts deionized water; The basic isolation component includes modified vegetable oil and light calcium carbonate in a mass ratio of 2:1; the environmentally friendly modifying agent includes sodium dodecylbenzenesulfonate and triethanolamine in a mass ratio of 3:2; the synergistic lubricating component includes calcium stearate and talc in a mass ratio of 1:1; and the foam-stabilizing film-forming component includes hydroxypropyl methylcellulose and polydimethylsiloxane in a mass ratio of 2:

1.

2. The high-efficiency concrete release agent according to claim 1, characterized in that, By weight, it includes the following components: 40 portions of basic isolation components; 20 parts of environmentally friendly modifying additives; 12 parts of synergistic lubricating component; 8 parts of foam-stabilizing film-forming component; 30 parts deionized water.

3. A method for preparing a high-efficiency concrete release agent, characterized in that, The preparation method for the high-efficiency concrete release agent according to any one of claims 1 to 2 includes the following steps: Step S1: Add deionized water to the reactor, heat to 40~50℃, add environmentally friendly modifying agent, and stir at 300~400r / min for 10~15min until completely dissolved; Step S2: Add the basic isolation component and the synergistic lubricating component, keep the temperature constant, increase the stirring speed to 500~600 r / min and stir for 20~25 min until the material is evenly dispersed; Step S3: Add the foam-stabilizing film-forming component, cool to room temperature, and stir at 200~300r / min for 15~20min to obtain the high-efficiency concrete release agent.

4. A method for applying a high-efficiency concrete release agent, characterized in that, For use in construction based on the high-efficiency concrete release agent according to claim 1 or 2, the construction method includes the following steps: Step S1: Add high-efficiency concrete release agent at 0.8%~1.2% of the mass of concrete cementitious materials, and extend the concrete mixing time by 2~3 minutes to ensure that the high-efficiency concrete release agent is evenly dispersed. Step S2: Clean the surface of the concrete formwork and keep the concrete formwork dry and clean; Step S3: Add the high-efficiency concrete release agent to the storage tank of the release machine, adjust the spraying pressure to 0.3~0.5MPa, and use atomized spraying to evenly spray the high-efficiency concrete release agent on the inside of the concrete formwork. The spraying amount is controlled at 80~120g / ㎡. After spraying, let it stand for 5~10 minutes until the high-efficiency concrete release agent forms a complete release film. Step S4: Inside the spliced ​​concrete formwork coated with high-efficiency concrete release agent, pour the concrete mixed with high-efficiency concrete release agent from step S1. Once the concrete reaches the designed demolding strength, start the demolding machine for mechanized demolding.

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