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CN-121990795-A - High-strength cement fiber fireproof plate and preparation method thereof

CN121990795ACN 121990795 ACN121990795 ACN 121990795ACN-121990795-A

Abstract

The invention relates to a high-strength cement fiber fireproof plate and a preparation method thereof, belonging to the technical field of building fireproof plates. The fireproof plate takes Portland cement, siliceous filler, composite reinforcing fiber, surface modified light fireproof aggregate and proper amount of water and auxiliary agent as raw materials, wherein the composite reinforcing fiber comprises polymer fiber and high-temperature-resistant inorganic fiber. The preparation method comprises the steps of raw material pretreatment, stirring pulping, vacuum compression molding and autoclaved curing with a specific system. According to the invention, by introducing active silica micropowder, PVA and silicon fiber composite reinforcement, perlite surface vitrification treatment and optimized low water-gel ratio vacuum molding and autoclaved curing process, a structure with a compact matrix and high-efficiency heat insulation micropores is cooperatively constructed, and the contradiction that the strength and the fireproof performance of the traditional plate are difficult to consider is solved. The prepared plate has extremely high flexural strength, excellent fireproof heat insulation and high-temperature stability, and is suitable for the building field with severe requirements on performance.

Inventors

  • CHEN ZHONGYOU

Assignees

  • 揭阳市好夫曼建材有限公司

Dates

Publication Date
20260508
Application Date
20260205

Claims (10)

  1. 1. The high-strength cement fiber fireproof plate is characterized by comprising the following components in parts by weight: 30-50 parts of silicate cement; 25-35 parts of siliceous filler; 1.0-3.0 parts of composite reinforcing fiber; 5-15 parts of surface modified light fireproof aggregate; a proper amount of water and auxiliary agents; wherein the composite reinforcing fiber comprises polymer fiber and high temperature resistant inorganic fiber.
  2. 2. The high strength cement fiber fire protection plate of claim 1, wherein the siliceous filler comprises silica powder and reactive silica powder, the reactive silica powder having a particle size of 10 μm or less and being present in an amount of 20% to 40% by weight based on the total weight of the siliceous filler.
  3. 3. The high strength cement fiber fire protection plate of claim 1, wherein the surface modified lightweight fire protection aggregate is vitrified closed cell perlite, the surface of which is formed with a vitreous enamel layer.
  4. 4. The high strength cement fiber fire protection plate of claim 1, wherein the polymer fibers are polyvinyl alcohol fibers and the high temperature resistant inorganic fibers are silicon fibers surface treated with a silane coupling agent.
  5. 5. The high strength cement fiber fire protection plate of any one of claims 1 to 4, wherein the raw materials further comprise 1 to 5 parts of diatomaceous earth and2 to 5 parts of calcium oxide.
  6. 6. A method of making a high strength cement fiber fire protection board according to any one of claims 1 to 5, comprising the steps of: (1) Carrying out surface coupling agent treatment on the high-temperature-resistant inorganic fibers, and carrying out surface vitrification treatment on the lightweight fireproof aggregate; (2) Mixing silicate cement, siliceous filler, water and an auxiliary agent to form slurry, adding the composite reinforced fiber and the surface modified light fireproof aggregate, and uniformly stirring to form slab slurry; (3) Carrying out compression molding on the slab slurry obtained in the step (2) in a vacuum environment to obtain a wet slab; (4) And (3) carrying out autoclaved curing on the wet slab prepared in the step (3), wherein the constant temperature of the autoclaved curing is 175-185 ℃ and the constant temperature time is 6-10 hours.
  7. 7. The method for producing a high-strength cement fiber fire-resistant board according to claim 6, wherein in the step (1), the surface vitrification treatment is a sintering treatment of perlite at 900 to 1000 ℃ for a residence time of 3 to 8 seconds.
  8. 8. The method for producing a high-strength cement fiber fire-resistant board according to claim 6, wherein in the step (2), the total water-to-gel ratio is controlled to be between 0.28 and 0.32.
  9. 9. The method for producing a high-strength cement fiber flame retardant panel according to claim 6, wherein in the step (3), the degree of vacuum is-0.07 to-0.15 MPa, and the molding pressure is 5 to 15MPa.
  10. 10. The method for producing a high-strength cement fiber fire-resistant board according to claim 6, wherein in the step (4), the autoclaved curing is performed by raising the temperature to 175-185 ℃ at a constant speed of 1-2 hours, keeping the temperature for 6-10 hours at a constant temperature, and then naturally lowering the temperature to 50 ℃ or lower and discharging the fire-resistant board from the kettle.

Description

High-strength cement fiber fireproof plate and preparation method thereof Technical Field The invention belongs to the technical field of building fireproof plates, and relates to a high-strength cement fiber fireproof plate and a preparation method thereof. Background The fireproof cement fiber board is one new inorganic fireproof board with cement as cementing material, plant fiber or mineral fiber as reinforcing phase, quartz sand, stuffing, etc. The fire-resistant and flame-retardant composite board has the core advantages of being capable of effectively blocking flame spreading and delaying fire spreading in fire scenes, simultaneously not producing toxic and harmful smoke, striving for time for people evacuation and property protection, and having wide application prospect in the field of building fire prevention by virtue of the characteristics of excellent fireproof and flame-retardant properties, high temperature resistance, corrosion resistance, environmental protection, no peculiar smell and the like. The plate is widely suitable for various buildings such as houses, restaurants and shops, is widely used for separating walls, kitchen and bathroom ceiling base layers in the houses to realize fireproof separation and dampproof protection, is used as places with dense personnel and open fire, is often used for building fire walls and surrounding guard plates of cooking benches to resist high temperature and flame erosion, and can be used for building shelf back plates and partition walls in the shops to achieve both fireproof performance and structural stability. The preparation method is mainly dry or wet forming, and the core steps comprise raw material proportioning stirring, fiber dispersion mixing, compression forming, normal temperature curing or low temperature drying, and the process is relatively mature and easy for large-scale production. The existing cement fiber fireproof plate still has a plurality of technical defects that although the fireproof performance meets the standard, cracking and falling phenomena are easy to occur at high temperature, the long-term fireproof stability is poor, the bonding force between the fiber and a cement matrix interface is poor, the toughness of the plate is poor, the impact resistance is poor, the plate is easy to damage in the transportation and construction process, the water resistance of part of the product is poor, the strength attenuation is obvious in a humid environment, and the application in the scenes such as a toilet, an outer wall and the like is limited. In addition, the uneven dispersion of the fibers in the traditional preparation process is easy to cause performance fluctuation, and a large amount of flame retardant filler is added for improving the fire resistance of part of the formula, so that the mechanical properties are further deteriorated, the cooperative optimization of fire resistance, mechanics and weather resistance is difficult to be considered, and the requirement of high-end building on the comprehensive properties of the plates cannot be completely met. Disclosure of Invention The invention aims to provide a high-strength cement fiber fireproof plate and a preparation method thereof, and aims to solve the problems of easiness in cracking at high temperature, insufficient toughness and weak interface bonding of the conventional cement fiber fireproof plate. The aim of the invention can be achieved by the following technical scheme: The high-strength cement fiber fireproof plate comprises the following components in parts by weight: 30-50 parts of silicate cement; 25-35 parts of siliceous filler; 1.0-3.0 parts of composite reinforcing fiber; 5-15 parts of surface modified light fireproof aggregate; a proper amount of water and auxiliary agents; wherein the composite reinforcing fiber comprises polymer fiber and high temperature resistant inorganic fiber. As a preferable technical scheme of the invention, the siliceous filler comprises quartz powder and active silica micropowder, wherein the particle size of the active silica micropowder is less than or equal to 10 mu m, and the content of the active silica micropowder accounts for 20-40% of the total weight of the siliceous filler. As a preferable technical scheme of the invention, the surface-modified lightweight fireproof aggregate is closed-cell perlite with vitrified surface, and a vitreous glaze layer is formed on the surface of the closed-cell perlite. As a preferable technical scheme of the invention, the polymer fiber is polyvinyl alcohol fiber, and the high-temperature-resistant inorganic fiber is silicon fiber subjected to surface treatment of a silane coupling agent. As a preferable technical scheme of the invention, the raw materials also comprise 1-5 parts of diatomite and 2-5 parts of calcium oxide. The application introduces submicron active silica powder, which has high specific surface area and high activity, can effectively fill the pores among cement hy