Preparation process and application of high-performance novel building material

Abstract

The invention discloses a preparation process and application of a high-performance novel building material, relates to the technical field of building materials, and aims to solve the problems that a fireproof plate in an existing high-performance novel building material is insufficient in fire endurance, easy to crack and deform at high temperature and incapable of effectively obstructing flame diffusion. The preparation process comprises the following steps: S1, raw material treatment: selecting magnesium oxide, magnesium chloride, silica fume, glass fibers, basalt fibers, plant fibers, nano magnesium hydroxide, a formaldehyde-free adhesive and water as raw materials, then performing alkali liquor soaking and drying treatment on the plant fibers, treating the glass fibers through a coupling agent, and performing microwave treatment on the basalt fibers; s2, raw materials are weighed, specifically, 30-40 parts by weight of magnesium oxide, 15-20 parts by weight of magnesium chloride, 5-10 parts by weight of silica fume and 5-8 parts by weight of glass fibers are sequentially weighed; the method has the advantage of improving the performance of the fireproof plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building materials, more particularly to a preparation process and application of a high-performance new building material. BACKGROUND

[0002] The high-performance new building material is the core guarantee of safety, function and environmental performance of modern construction engineering. As a key barrier to block the spread of fire and delay structural failure, the performance of fireproof building materials directly relates to the safety of personnel and the degree of property loss. The mainstream fireproof building materials on the current market, such as fireproof plates, have realized basic fireproof function, but their performance short board in complex scenarios is increasingly prominent.

[0003] For example, in high-rise building scenarios, the fire has the characteristics of significant chimney effect, rapid temperature rise and long burning duration, which requires the fireproof building material not only to have high fire resistance limit, but also to maintain structural integrity at high temperature. However, the existing products generally have the problem of insufficient fire resistance limit, and are prone to cracking and deformation at high temperature, which cannot effectively block the spread of fire. In view of this, the present application provides a preparation process and application of a high-performance new building material. SUMMARY

[0004] The purpose of the present application is to provide a preparation process and application of a high-performance new building material, which aims to solve the problem of insufficient fire resistance limit of the existing high-performance new building material, and the problem of cracking and deformation at high temperature, which cannot effectively block the spread of fire.

[0005] To solve the above technical problems, the present application provides the following technical scheme: a preparation process of a high-performance new building material, which comprises the following steps:

[0006] S1, raw material processing, selecting magnesium oxide, magnesium chloride, silica fume, glass fiber, basalt fiber, plant fiber, nano magnesium hydroxide, formaldehyde-free adhesive, and water as raw materials, then soaking and drying the plant fiber in alkali solution, treating the glass fiber with a coupling agent, and microwave treating the basalt fiber;

[0007] S2, weighing the raw materials, weighing 30-40 parts of magnesium oxide, 15-20 parts of magnesium chloride, 5-10 parts of silica fume, 5-8 parts of glass fiber, 3-4 parts of basalt fiber, 10-15 parts of plant fiber, 5-8 parts of nano magnesium hydroxide, 3-5 parts of formaldehyde-free adhesive, and 20-25 parts of water;

[0008] S3, preparing a mixed slurry, adding magnesium oxide and magnesium chloride into a stirring pot, adding part of water to form a magnesium-based cementitious material matrix, then adding silica fume, nano magnesium hydroxide, glass fiber, basalt fiber, plant fiber, formaldehyde-free adhesive and the remaining water in sequence, and stirring to obtain a mixed slurry;

[0009] S4, forming, pouring the mixed slurry into a mold coated with a release agent, then vibrating forming through a high frequency vibration table, and after forming, placing in a constant temperature and humidity chamber for standing, completing preliminary curing;

[0010] S5, curing, taking the cured building material out of the mold and placing it in a curing chamber for curing;

[0011] S6, post-processing, processing the cured building material and spraying a fireproof coating.

[0012] Preferably, in the above step S3, when part of the water is added to form a magnesium cementitious material matrix, the part of the water added is 40%-50% of the total water amount, and the water temperature is controlled at 20-25℃.

[0013] Preferably, in the above step S4, the vibration frequency of the high frequency vibration table is 30-50Hz, the amplitude is 0.5-1mm, the vibration time is 2-3 minutes, the temperature of the constant temperature and humidity chamber is 25-30℃, the relative humidity is 60-70%, and the standing time is 24-48 hours.

[0014] Preferably, in the above step S5, the curing temperature of the curing chamber is 42-48℃, the relative humidity is 82-88%, the curing time is 8-9 days, and the temperature is raised from room temperature to the set temperature at a rate of 2℃ / h in the first 1-3 days of curing, and the temperature is lowered to room temperature at a rate of 1℃ / h in the last 24 hours of curing.

[0015] Preferably, in the above step S6, the processing of the cured building material includes cutting the building material with a diamond saw blade and surface polishing with 80-120 mesh sandpaper, and the fireproof coating is sprayed by an intumescent fireproof coating.

[0016] Preferably, the thickness of the fireproof coating is 0.6-0.9mm, and the air spraying method is used for construction, with a spraying pressure of 0.3-0.5MPa.

[0017] Preferably, in the above step S1, the formaldehyde-free adhesive is one or more of a soybean protein adhesive, a starch adhesive, and a lignin adhesive.

[0018] The application also provides an application of a high-performance new building material.

[0019] Compared with the prior art, the application has the following beneficial effects:

[0020] 1. The application can decompose and release water vapor at high temperature by adding 5-8 parts of nano magnesium hydroxide to inhibit combustion, and cooperate with a 0.6-0.9mm thick fireproof coating to form double protection, the coating expands to form a heat insulation carbon layer to block the flame, the pretreated glass fiber, basalt fiber and plant fiber synergistically enhance the structural stability, avoid cracking and deformation at high temperature, effectively block the flame spread, and solve the problem of insufficient fire resistance of the existing fireproof plate.

[0021] 2. The glass fiber, basalt fiber and plant fiber are more closely combined with the magnesium cement material matrix after targeted treatment, the bending and compressive strength of the building material is improved, the formaldehyde-free adhesive is used to avoid the release of harmful substances, the mechanical properties and environmental protection are synergistically optimized, and the bubbles are removed by high-frequency vibration forming, the internal stress is reduced by gradient temperature control curing, the standardization cutting and polishing and fireproof coating construction ensure the size accuracy and performance uniformity of the building material, and the quality fluctuation in production is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a preparation process flowchart of the application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all.

[0024] Embodiment one

[0025] Magnesium oxide, magnesium chloride, silica ash, glass fiber, basalt fiber, plant fiber, nano magnesium hydroxide, formaldehyde-free adhesive and water are selected as raw materials, wherein the formaldehyde-free adhesive is one or more of a combination of soybean protein adhesive, starch adhesive and lignin adhesive, then the plant fiber is soaked in alkali solution and dried, the glass fiber is treated by coupling agent, and the basalt fiber is treated by microwave;

[0026] Then 30 parts of magnesium oxide, 15 parts of magnesium chloride, 5 parts of silica ash, 5 parts of glass fiber, 3 parts of basalt fiber, 10 parts of plant fiber, 5 parts of nano magnesium hydroxide, 3 parts of formaldehyde-free adhesive and 20 parts of water are weighed according to the weight parts;

[0027] Magnesium oxide and magnesium chloride are added to a stirring pot, 40% of the total water is added to form a magnesium cement material matrix, and the water temperature is controlled at 20℃, then silica ash, nano magnesium hydroxide, glass fiber, basalt fiber, plant fiber, formaldehyde-free adhesive and the remaining water are added in turn, and the mixed slurry is obtained by stirring;

[0028] The mixed slurry is poured into a mold coated with a release agent, and then vibration forming is performed by a high-frequency vibration table, the vibration frequency of the high-frequency vibration table is 30 Hz, the vibration amplitude is 0.5 mm, and the vibration time is 2 minutes, and after forming, it is placed in a constant temperature and humidity chamber for standing, the temperature of the constant temperature and humidity chamber is 25℃, the relative humidity is 60%, and the standing time is 24 hours, thereby completing the preliminary curing;

[0029] The cured building material is taken out of the mold and placed in a curing room with a temperature of 42℃ and a relative humidity of 82% for curing, the curing time is 8 days, and the temperature is increased from room temperature to the set temperature at a rate of 2℃ / h in the first day of curing, and 24 hours before the end of curing is decreased to room temperature at a rate of 1℃ / h;

[0030] The cured building material is processed, including cutting the building material with a diamond saw blade and surface grinding with 80 mesh sandpaper, and then an air spraying method is used to spray an intumescent fire retardant coating with a thickness of 0.6 mm on the surface of the building material, and the spraying pressure is 0.3 MPa.

[0031] Example two

[0032] Magnesium oxide, magnesium chloride, silica fume, glass fiber, basalt fiber, plant fiber, nano magnesium hydroxide, formaldehyde-free adhesive, and water are selected as raw materials, wherein the formaldehyde-free adhesive is one or more of a combination of soybean protein adhesive, starch adhesive, and lignin adhesive, then the plant fiber is soaked in alkali solution and dried, the glass fiber is treated with a coupling agent, and the basalt fiber is treated with a microwave;

[0033] Then 40 parts of magnesium oxide, 20 parts of magnesium chloride, 10 parts of silica fume, 8 parts of glass fiber, 4 parts of basalt fiber, 15 parts of plant fiber, 8 parts of nano magnesium hydroxide, 5 parts of formaldehyde-free adhesive, and 25 parts of water are weighed according to the weight parts;

[0034] Magnesium oxide and magnesium chloride are added to a stirring pot, 50% of the total water is added to form a magnesium cement base, and the water temperature is controlled at 25℃, then silica fume, nano magnesium hydroxide, glass fiber, basalt fiber, plant fiber, formaldehyde-free adhesive, and the remaining water are added in sequence, and the mixed slurry is obtained by stirring;

[0035] The mixed slurry is poured into a mold coated with a release agent, and then vibration forming is performed by a high-frequency vibration table, the vibration frequency of the high-frequency vibration table is 50 Hz, the vibration amplitude is 1 mm, and the vibration time is 3 minutes, and after forming, it is placed in a constant temperature and humidity chamber for standing, the temperature of the constant temperature and humidity chamber is 30℃, the relative humidity is 70%, and the standing time is 48 hours, thereby completing the preliminary curing;

[0036] The cured building material is taken out of the mold and placed in a curing room with a temperature of 48℃ and a relative humidity of 88% for curing, the curing time is 9 days, and the temperature is raised from room temperature to the set temperature at a rate of 2℃ / h in the first 3 days of curing, and 24 hours before the end of curing is reduced to room temperature at a rate of 1℃ / h;

[0037] The cured building material is processed, including cutting the building material with a diamond saw blade and surface grinding with 120 mesh sandpaper, then using an air spraying method to spray an intumescent fire retardant coating with a thickness of 0.9mm on the surface of the building material, and the spraying pressure is 0.5MPa.

[0038] Example Three

[0039] Magnesium oxide, magnesium chloride, silica fume, glass fiber, basalt fiber, plant fiber, nano magnesium hydroxide, formaldehyde-free adhesive, water are selected as raw materials, wherein the formaldehyde-free adhesive is one or more of soybean protein adhesive, starch adhesive and lignin adhesive, then the plant fiber is soaked in alkali solution and dried, the glass fiber is treated with a coupling agent, and the basalt fiber is treated with a microwave;

[0040] Then 35 parts of magnesium oxide, 18 parts of magnesium chloride, 8 parts of silica fume, 7 parts of glass fiber, 3.5 parts of basalt fiber, 13 parts of plant fiber, 7 parts of nano magnesium hydroxide, 4 parts of formaldehyde-free adhesive, and 23 parts of water are weighed according to weight parts;

[0041] Magnesium oxide and magnesium chloride are added to a stirring pot, 45% of the total water is added to form a magnesium cement base, and the water temperature is controlled at 22℃, then silica fume, nano magnesium hydroxide, glass fiber, basalt fiber, plant fiber, formaldehyde-free adhesive and the remaining water are added in turn, and the mixed slurry is obtained by stirring;

[0042] The mixed slurry is poured into a mold coated with a release agent, then vibration forming is carried out by a high-frequency vibration table, the vibration frequency of the high-frequency vibration table is 40Hz, the amplitude is 0.8mm, and the vibration time is 3 minutes, after forming, it is placed in a constant temperature and humidity chamber for standing, the temperature of the constant temperature and humidity chamber is 30℃, the relative humidity is 70%, and the standing time is 48 hours, thereby completing the preliminary curing;

[0043] The cured building material is taken out of the mold and placed in a curing room with a temperature of 48℃ and a relative humidity of 88% for curing, the curing time is 9 days, and the temperature is raised from room temperature to the set temperature at a rate of 2℃ / h in the first 3 days of curing, and 24 hours before the end of curing is reduced to room temperature at a rate of 1℃ / h;

[0044] The well-maintained building material is processed, including cutting the building material by using a diamond saw blade and surface polishing by using 100 mesh sandpaper, then an air spraying method is used to spray the building material surface with an intumescent fireproof coating, a fireproof coating with a thickness of 0.8mm is sprayed, and the spraying pressure is 0.4MPa.

[0045] The performance of the fireproof plates prepared in the three examples is detected, and the results are shown in the following table.

[0046]

[0047] The embodiments of the present application are disclosed, but are not limited to the embodiments, and the ordinary skilled in the art can easily understand the spirit of the present application according to the above embodiments, and make different inferences and changes, as long as they do not deviate from the spirit of the present application, they are within the protection scope of the present application.

Claims

1. A process for the preparation of high performance new generation building material, characterized in that, The preparation process comprises the following steps: S1, raw material processing, selecting magnesium oxide, magnesium chloride, silica ash, glass fiber, basalt fiber, plant fiber, nano magnesium hydroxide, formaldehyde-free adhesive, water as raw materials, then soaking and drying treatment of plant fiber, treating glass fiber with coupling agent, microwave treatment of basalt fiber; S2, weighing raw materials, weighing 30-40 parts of magnesium oxide, 15-20 parts of magnesium chloride, 5-10 parts of silica ash, 5-8 parts of glass fiber, 3-4 parts of basalt fiber, 10-15 parts of plant fiber, 5-8 parts of nano magnesium hydroxide, 3-5 parts of formaldehyde-free adhesive, 20-25 parts of water; S3, preparing mixed slurry, adding magnesium oxide and magnesium chloride into a stirring pot, adding part of water to form a magnesium-based cementitious material matrix, then adding silica ash, nano magnesium hydroxide, glass fiber, basalt fiber, plant fiber, formaldehyde-free adhesive and the remaining water in turn, and stirring to obtain a mixed slurry; S4, forming, pouring the mixed slurry into a mold coated with a release agent, then vibrating forming by a high-frequency vibration table, and placing in a constant temperature and humidity chamber after forming to stand for preliminary curing; S5, curing, taking out the cured building material from the mold and placing it in a curing room for curing; S6, post-processing, processing the cured building material and spraying a fireproof coating.

2. The process for preparing a high-performance new building material according to claim 1, characterized in that, In the above step S3, when part of the water is added to form a magnesium-based cementitious material matrix, the part of water added is 40%-50% of the total water amount, and the water temperature is controlled at 20-25℃.

3. The process for preparing a high-performance new building material according to claim 1, characterized in that, In the above step S4, the vibration frequency of the high-frequency vibration table is 30-50Hz, the amplitude is 0.5-1mm, the vibration time is 2-3 minutes, the temperature of the constant temperature and humidity chamber is 25-30℃, the relative humidity is 60-70%, and the standing time is 24-48 hours.

4. The preparation process of high-performance new building materials according to claim 1, characterized in that, In the above step S5, the curing temperature of the curing room is 42-48℃, the relative humidity is 82-88%, the curing time is 8-9 days, and the temperature is raised from room temperature to the set temperature at a rate of 2℃ / h in the first 1-3 days of curing, and the temperature is lowered to room temperature at a rate of 1℃ / h in the last 24 hours of curing.

5. The process for preparing a high-performance new building material according to claim 1, characterized in that, In the above step S6, the processing of the cured building material includes cutting the building material with a diamond saw blade and surface polishing with 80-120 mesh sandpaper, and the fireproof coating is sprayed by an intumescent fireproof coating.

6. The preparation process of high-performance new building materials according to claim 5, characterized in that, The coating thickness of the fireproof coating is 0.6-0.9mm, and the air spraying method is used for construction with a spraying pressure of 0.3-0.5MPa.

7. The process for preparing a high-performance new building material according to claim 1, characterized in that, In the above step S1, the formaldehyde-free adhesive is one or more of a soybean protein adhesive, a starch adhesive and a lignin adhesive.

8. The use of a high-performance new building material, comprising a preparation process of a high-performance new building material according to any one of claims 1-7, characterized in that, For use in buildings.

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