A mold release formulation for pc component molds and method of use

Abstract

The application discloses a kind of release agent formulations for PC component mould, including preparation one and preparation two, with the basis amount of every 100kg, preparation one: talcum powder 18kg-22kg;108 glue 8.5kg-10.5kg;Water 68-72kg;Preparation two: permeable crystalline particles 18kg-22kg;Water 78kg-82kg.Further disclose the use method of this release preparation, including S01: preparation one is first uniformly sprayed in the four around and bottom surface of PC component mould, forms a layer of water-based protective film;S02: after water-based protective film is dried, again evenly coated preparation two;S03: the PC component mould coated by step S02 is used for pouring concrete, and is steamed and is kept in conservation.The application can realize effective release between concrete and PC component mould, PC component mould surface is free of air hole, free of color difference after release, with good rainwater penetration resistance, and can greatly save cost.

Description

Technical Field

[0001] This invention relates to the field of building materials and construction technology, specifically to a release agent and method of use for PC component molds. Background Technology

[0002] In recent years, my country has vigorously developed prefabricated buildings, among which prefabricated concrete structures are widely used in various engineering projects. Prefabricated PC components are a widely used type of mold structure. When PC component molds are demolded, the release agent can help the concrete separate smoothly from the mold, keeping the concrete product sharp and intact, as well as protecting the mold from damage, so that the next concrete pouring operation can proceed smoothly.

[0003] Currently, most mold release agents used in the production and use of prefabricated PC components are water-based, with a market price of approximately 8,000-12,000 yuan / ton. Not only are the material prices high, but the film formed by the water-based mold release agent mostly remains on the surface of the PC component, exhibiting uneven dispersion. This leads to increased micropores and significant color differences on the component surface. Therefore, there is an urgent need to develop a mold release agent formulation and application method for PC component molds that is unaffected by high-temperature autoclaving temperatures, has no significant negative effects on the surface of PC components, and can improve the anti-permeability of PC components. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a release agent formulation and a method for using PC component molds.

[0005] The technical solution adopted by the present invention to solve the above problems is as follows: A release agent formulation for PC component molds is provided, comprising formulation one and formulation two, wherein the formulation one and formulation two are composed of the following weight components per 100 kg:

[0006] Formulation 1: Talc powder: 18kg-22kg; 108 glue: 8.5kg-10.5kg; Water: 68-72kg;

[0007] Formulation 2: 18kg-22kg of penetrating crystallized granules; 78kg-82kg of water.

[0008] The talc powder is preferably Grade A general-purpose talc powder; the 108 glue is required to meet the relevant industry standards in terms of appearance, non-volatile content, bonding strength, pH value, and low-temperature stability; the penetrating crystallizing particles are required to meet the performance indicators of GB18445-2012; the water used is normal drinking water, and the use of sewage is strictly prohibited.

[0009] Preferably, based on a weight of 100 kg, formulation one and formulation two are composed of the following components by weight: formulation one: talc powder: 20 kg; 108 glue: 10 kg; water: 70 kg;

[0010] Formulation 2: 20 kg of penetrating crystallized granules; 80 kg of water.

[0011] Furthermore, a method for using a release agent formulation for PC component molds is provided, comprising the following steps:

[0012] Step S01: The first preparation is loaded into the spraying device and sprayed evenly on the periphery and bottom surface of the PC component mold to form a water-based protective film.

[0013] Step S02: After the water-based protective film prepared in step S01 dries, apply formulation two evenly around the perimeter and bottom of the PC component mold.

[0014] Step S03: Use the PC component mold coated in step S02 to pour concrete and autoclave it.

[0015] Preferably, when the preparation is sprayed, the nozzle diameter in the spraying device is ≤2mm, and the distance d between the nozzle and the surface of the PC component mold to be sprayed needs to be 300mm≤d≤500mm.

[0016] Preferably, when the formulation described in step S01 is sprayed on the periphery and bottom surface of the PC component mold, the number of spraying times is not less than 2, with an interval of not less than 60 minutes between each spraying, and the thickness of the final aqueous protective film is 30um-50um.

[0017] Preferably, the formulation described in step S01 is prepared using the following method:

[0018] S011: First, mix talcum powder with water, stir well, and set aside.

[0019] S012: Add 108 glue to the solution formed in step S011, stir well, and then add it to the spraying device for later use.

[0020] Preferably, the second formulation described in step S02 is prepared by the following method: first, the penetrating crystallizing particles are poured into a mixing container, then an appropriate amount of water is added and stirred evenly, and then added to a spraying device for later use.

[0021] Preferably, the preparation of Formulation 2 should not be left to stand for more than 6 hours at a time.

[0022] The beneficial effects of this invention are as follows: Using the release agent formulation described herein, formulation one is first uniformly sprayed onto the PC component mold. After drying, formulation two is then uniformly applied. After formulation two dries, the PC component is placed in the mold, concrete is poured, and autoclaved. Under the action of high-temperature steam curing, the penetrating crystalline particles undergo hydration, penetrating into the capillary pores of the concrete surface of the component, forming a natural closed pore barrier. This effectively prevents the external environment from affecting the visual appearance of the PC component surface due to high-temperature steam curing, and also prevents the film adsorption on the PC component surface from reducing the component's adhesion. Furthermore, compared with existing water-based release agents, the release agent of this invention can reduce costs by approximately 80%, significantly saving on construction costs. It can also effectively improve the rainwater impermeability of the PC component surface, reducing the risk of leakage and maintenance costs in the later stages of PC component installation. Detailed Implementation

[0023] To effectively illustrate the release agent formulation and usage method for PC component molds described in this invention, the following specific embodiments will be used to further explain the invention.

[0024] Example 1

[0025] A release agent formulation for PC component molds is provided, wherein the content of each component is shown in Table 1 below:

[0026]

[0027] (Table 1)

[0028] Among them: Grade A general-purpose talc is preferred; 108 glue is required to meet the relevant industry standards in terms of appearance, non-volatile content, bonding strength, pH value and low temperature stability; penetrating crystalline particles are required to meet the performance indicators of GB18445-2012; normal drinking water is used and sewage is strictly prohibited.

[0029] The method of using the release agent formulation for the PC component mold described in Embodiment 1 above includes the following steps:

[0030] Step S011-1: Mix 18kg of talc powder with 72kg of water, stir well and set aside.

[0031] In step S012-1, 8.5 kg of 108 glue is added to the solution formed in step S011-1, and after stirring evenly, formulation one is formed and loaded into the spraying device.

[0032] Step S01-1: The preparation prepared in step S012-1 is uniformly sprayed on the periphery and bottom surface of the PC component mold. During spraying, the nozzle diameter in the spraying device is ≤2mm, and the distance between the nozzle and the surface of the PC component mold to be sprayed is d=300mm. The periphery and bottom surface of the PC component mold are sprayed three times, with an interval of 80 minutes between each spraying.

[0033] Step S02-1: Pour 18 kg of penetrating crystallization particles into a mixing container, then add 82 kg of water while stirring evenly to form formulation two. Apply formulation two evenly to the sides and bottom of the PC component mold.

[0034] Step S03-1: Use the coated PC component mold to pour concrete and autoclave it.

[0035] Once formulation two is prepared, the maximum storage time should not exceed 6 hours.

[0036] Example 2

[0037] A release agent formulation for PC component molds is provided, wherein the content of each component is shown in Table 2 below:

[0038]

[0039] (Table 2)

[0040] Among them: Grade A general-purpose talc is preferred; 108 glue is required to meet the relevant industry standards in terms of appearance, non-volatile content, bonding strength, pH value and low temperature stability; penetrating crystalline particles are required to meet the performance indicators of GB18445-2012; normal drinking water is used and sewage is strictly prohibited.

[0041] The method of using the release agent formulation for the PC component mold described in Example 2 above includes the following steps:

[0042] Step S011-2: Mix 20kg of talcum powder with 70kg of water, stir well and set aside.

[0043] In step S012-2, 10 kg of 108 glue is added to the solution formed in step S011-2, and after stirring evenly, formulation one is formed and loaded into the spraying device.

[0044] Step S01-2: The preparation prepared in step S012-2 is uniformly sprayed on the periphery and bottom surface of the PC component mold. During spraying, the nozzle diameter in the spraying device is ≤2mm, and the distance between the nozzle and the surface of the PC component mold to be sprayed is d=400mm. The periphery and bottom surface of the PC component mold are sprayed twice, with an interval of 70 minutes between the two sprayings.

[0045] Step S02-2: Pour 20kg of penetrating crystallization particles into a mixing container, then add 80kg of water while stirring evenly to form formulation two. Apply formulation two evenly to the sides and bottom of the PC component mold.

[0046] Step S03-2: Use the coated PC component mold to pour concrete and autoclave it.

[0047] Once formulation two is prepared, the maximum storage time should not exceed 6 hours.

[0048] Example 3

[0049] A release agent formulation for PC component molds is provided, wherein the content of each component is shown in Table 3 below:

[0050]

[0051] (Table 3)

[0052] Among them: Grade A general-purpose talc is preferred; 108 glue is required to meet the relevant industry standards in terms of appearance, non-volatile content, bonding strength, pH value and low temperature stability; penetrating crystalline particles are required to meet the performance indicators of GB18445-2012; normal drinking water is used and sewage is strictly prohibited.

[0053] The method of using the release agent formulation for the PC component mold described in Example 3 above includes the following steps:

[0054] Step S011-3: Mix 22kg of talc powder with 68kg of water, stir well and set aside.

[0055] In step S012-3, 10.5 kg of 108 glue is added to the solution formed in step S011-3, and after stirring evenly, formulation one is formed and loaded into the spraying device.

[0056] Step S01-3: The preparation prepared in step S012-3 is uniformly sprayed on the periphery and bottom surface of the PC component mold. During spraying, the nozzle diameter in the spraying device is ≤2mm, and the distance between the nozzle and the surface of the PC component mold to be sprayed is d=500mm. The periphery and bottom surface of the PC component mold are sprayed twice, with an interval of 60 minutes between the two sprayings.

[0057] Step S02-3: Pour 22kg of penetrating crystallization particles into a mixing container, then add 78kg of water while stirring evenly to form formulation two. Apply formulation two evenly to the sides and bottom of the PC component mold.

[0058] Step S03-3: Use the coated PC component mold to pour concrete and autoclave it.

[0059] Once formulation two is prepared, the maximum storage time should not exceed 6 hours.

[0060] By using the release agent described in Examples 1 to 3 of the present invention, the concrete can be smoothly separated from the PC component mold, maintaining the sharp edges and complete shape of the concrete product; and after demolding, the surface of the PC component mold has no obvious pores or color difference, and has good resistance to rainwater penetration.

[0061] Furthermore, taking a domestic precast PC component factory as an example, 50 PC component molds were randomly sampled, and the surface quality of the components after demolding using the release agent formulation and application method described in this invention was compared with that after demolding using the traditional process, as follows:

[0062]

[0063] Therefore, it can be seen that, compared with traditional release agents, the surface appearance of PC component molds after demolding using the release agent formulation described in this invention is significantly reduced in terms of black and white spots, color difference, and the number of micropores and microcracks, resulting in a good improvement in demolding effect.

[0064] Comparative Example 1

[0065] For formulation one, if the talc powder is mixed with the glue first, the glue and talc powder will stick together and form small clumps, which will block the normal use of the nozzle equipment.

[0066] Comparative Example 2

[0067] In the preparation of formulation one, if the amount of talc powder and 108 glue required for formulation one is excessive, and the amount of penetrating crystal particles required for formulation two is excessive, the concentration of formulation one and formulation two will be too high. This will easily cause nozzle blockage during spraying, and after the PC component mold surface is demolded, a large amount of obvious film formation will occur, making it impossible to achieve effective demolding of concrete and PC component mold.

[0068] Comparative Example 3

[0069] In the preparation of formulation one, if the amount of talc powder and 108 glue required for formulation one is too small, and the amount of penetrating crystal particles required for formulation two is too small, the concentration of formulation one and formulation two will be too low. This will require multiple sprayings during spraying, and the particles will not be able to penetrate deeply into the surface of the PC component mold, resulting in the inability to form an effective protective barrier on the surface of the PC component and to prevent the impact of the environment on the surface of the PC component in the later stages.

[0070] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the protection scope of the present invention.

Claims

1. A method of using a release agent formulation for PC component molds, characterized in that, Includes the following steps: Step S01: The first formulation is loaded into the spraying device and evenly sprayed onto the perimeter and bottom surface of the PC component mold to form a water-based protective film; the first formulation is prepared by the following method: Step S011: First, mix the talcum powder with water, stir well, and set aside. Step S012: Add 108 glue to the solution formed in step S011, stir well, and add it to the spraying device for later use; Step S02: After the water-based protective film made in step S01 dries, apply formulation two evenly around the perimeter and bottom of the PC component mold. Formulation two is made by the following method: first, pour the penetrating crystallizing particles into a mixing container, then add an appropriate amount of water and stir evenly before use. Step S03: Use the PC component mold coated in step S02 to pour concrete and autoclave it. The release agent formulation for PC component molds comprises Formulation 1 and Formulation 2, and on a basis of 100 kg, Formulation 1 and Formulation 2 are composed of the following weight components: Formulation 1: Talc powder: 18kg-22kg; 108 glue: 8.5kg-10.5kg; Water: 68-72kg; Formulation 2: Penetrating crystallization particles: 18kg-22kg; Water: 78kg-82kg.

2. The method of using the release agent formulation for PC component molds according to claim 1, characterized in that, When the preparation is sprayed, the nozzle diameter in the spraying device is ≤2mm, and the distance d between the nozzle and the surface of the PC component mold to be sprayed must meet 300mm≤d≤500mm.

3. The method of using the release agent formulation for PC component molds according to claim 1, characterized in that, When the formulation described in step S01 is sprayed on the periphery and bottom surface of the PC component mold, the number of spraying times shall not be less than 2, with an interval of not less than 60 minutes between each spraying, and the final water-based protective film thickness shall be 30um-50um.

4. The method of using the release agent formulation for PC component molds according to claim 1, characterized in that, The preparation of Formulation 2 should not be left to stand for more than 6 hours at a time.

5. The method of using the release agent formulation for PC component molds according to claim 1, characterized in that, Based on a weight ratio of 100 kg, Formulation 1 and Formulation 2 are composed of the following weight components: Formulation 1: Talc powder: 20kg; 108 glue: 10kg; Water: 70kg; Formulation 2: Penetrating crystallizing particles: 20kg; Water: 80kg.

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