Modified floating bead calcium silicate, preparation method thereof and thermal insulation and decoration integrated board

A technology of calcium silicate and floating beads, applied in the field of thermal insulation of construction projects, can solve the problems of affecting thermal insulation effect, cracking of foam cement board surface, poor waterproof performance, etc.

Pending Publication Date: 2022-03-11
国检测试控股集团雄安有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its strength is low and the opening rate is high, and some foam cement boards may crack on the surface, resulting in water seepage and affecting the thermal insulation effect.
[0005] Floating bead calcium silicate fireproof board is a new type of green, energy-sav

Method used

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  • Modified floating bead calcium silicate, preparation method thereof and thermal insulation and decoration integrated board

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preparation example Construction

[0027] The invention provides a kind of preparation method of calcium silicate of modified floating beads, comprising the following steps:

[0028] Mix the floating beads, surfactant, water repellent and water to obtain the floating beads dispersion;

[0029] The floating beads dispersion and lime milk are mixed for hydrothermal reaction to obtain xonotlite slurry; the mass ratio of calcium hydroxide in the floating beads and lime milk is (5~20):(1~5 );

[0030] The hard calcium silicate slurry stone and the reinforcing fiber are mixed and then pressed into shape to obtain the modified calcium silicate calcium silicate.

[0031] In the present invention, unless otherwise specified, the raw materials used are commercially available products well known to those skilled in the art.

[0032] The present invention mixes the floating beads, surfactant, water repellent and water (hereinafter referred to as the first mixing) to obtain the floating beads dispersion.

[0033] In the ...

Embodiment 1

[0121] Take 5 parts of floating beads and 80 parts of deionized water, prepare water-based slurry, ball mill for 30 minutes, add 0.5 parts of polyvinyl alcohol, 0.5 parts of silane coupling agent KH-5700, and mix evenly with a magnetic stirrer to obtain floating beads Dispersions;

[0122] Mix the floating bead dispersion with milk of lime, wherein the mass of calcium hydroxide base is 1 part, the obtained mixture is subjected to hydrothermal reaction, the stirring speed is 200r / min, and the temperature is raised to 150°C for 8 hours to obtain xonotlite slurry;

[0123] Wash the xonotlite slurry and mix it with pulp, press molding and drying to obtain modified calcium silicate beads with a pore size of 2-10nm, a compressive strength of 1MPa, and a thermal conductivity of 0.03W / (m·K) , bulk density is 70kg / m 3 , Hydrophobic rate of 98%.

Embodiment 2

[0125] Take 20 parts of floating beads and 75 parts of deionized water, prepare water-based slurry, ball mill for 30 minutes, add 2.5 parts of sodium dodecylbenzenesulfonate, 3 parts of silane coupling agent KH-5703, and mix with a magnetic stirrer Evenly, get the floating bead dispersion;

[0126] Mix the floating bead dispersion with milk of lime, wherein the mass of calcium hydroxide is 5 parts, and the obtained mixture is subjected to hydrothermal reaction, the stirring speed is 500r / min, and the temperature is raised to 250°C for 72 hours to obtain xonotlite slurry;

[0127] Wash the xonotlite slurry and mix it with glass fiber, press and dry to obtain modified calcium silicate beads with a pore size of 30-100nm, a compressive strength of 20MPa, and a thermal conductivity of 0.08W / (m·K ), the bulk density is 800~1000kg / m 3 , Hydrophobic rate of 90%.

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Abstract

The invention relates to the technical field of thermal insulation of constructional engineering, in particular to modified floating bead calcium silicate, a preparation method thereof and a thermal insulation and decoration integrated board. The preparation method provided by the invention comprises the following steps: mixing floating beads, a surfactant, a water repellent and water to obtain a floating bead dispersion liquid; mixing the floating bead dispersion liquid with lime milk, and carrying out hydrothermal reaction to obtain xonotlite slurry; the mass ratio of the floating beads to calcium hydroxide in the lime milk is (5-20): (1-5); and mixing the xonotlite slurry and reinforced fibers, and performing compression molding to obtain the modified floating bead calcium silicate. The modified floating bead calcium silicate obtained by the preparation method provided by the invention has the pore diameter of 2-100nm, the percentage of closed pore of 90-95%, the compressive strength of 1-20MPa, the heat conductivity coefficient of 0.03-0.08 W/(m.K), the volume weight of 70-1000kg/m < 3 > and the hydrophobic rate of 85-98%.

Description

technical field [0001] The invention relates to the technical field of thermal insulation of construction engineering, in particular to a modified calcium silicate with floating pearls and a preparation method thereof, and an integrated thermal insulation and decoration board. Background technique [0002] External wall insulation technology is one of the most mainstream energy-saving technologies in the field of construction engineering. If the external wall insulation material is selected properly, it can not only ensure the construction quality, but also achieve the purpose of reducing energy consumption and make a great contribution to the cause of environmental protection. At present, the external wall insulation methods widely used in China mainly include pasting expanded polystyrene board, rubber powder polystyrene particle insulation, polyurethane insulation, cast-in-place polystyrene board, etc. In addition to their own defects, these methods also have a common short...

Claims

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Application Information

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IPC IPC(8): B32B9/00B32B9/04B32B7/12B32B5/02B32B27/30B32B33/00B32B27/40B32B37/12B32B37/10
CPCB32B9/00B32B9/045B32B7/12B32B27/302B32B5/028B32B27/40B32B5/02B32B9/047B32B33/00B32B37/12B32B37/10B32B2262/108B32B2307/304B32B2307/73B32B2307/714
Inventor 孔祥荣王小璐李聪刘新猛康文刚
Owner 国检测试控股集团雄安有限公司
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