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Method for preparing light porous inorganic gelled material product from gel particles

A technology of inorganic cementitious materials and gel particles, applied in the field of porous lightweight materials, can solve the problems of low pressure bearing capacity, floating and uneven distribution of pores, high energy consumption, etc., to achieve good thermal insulation performance, easy to control And the effect of good adjustment and pressure bearing performance

Inactive Publication Date: 2012-11-14
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the sample has high requirements on the conditions of foaming and forming holes in the early stage of curing, some bad phenomena such as merging of bubbles, floating up and uneven distribution of pores will occur during the foaming process, resulting in the shape and size of the formed holes are different, and spherical In addition, the shape, size and distribution of pores are not easy to control, so it cannot meet the needs of various lightweight porous materials.
Although the aerated concrete blocks used in buildings can enhance the thermal insulation effect of buildings, they need to be cooked at high temperature and high pressure during the production process, which consumes a lot of energy

Method used

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  • Method for preparing light porous inorganic gelled material product from gel particles
  • Method for preparing light porous inorganic gelled material product from gel particles
  • Method for preparing light porous inorganic gelled material product from gel particles

Examples

Experimental program
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Effect test

preparation example Construction

[0021] (1) Preparation of pore-forming agent particles

[0022] 1. Sodium alginate is a natural linear polysaccharide polymer with good water solubility and acts as a gelling mother liquor. Prepare a sodium alginate aqueous solution with a concentration of 0.7% to 1.3% according to mass percentage: mechanically stir the sodium alginate at 20 to 80°C to dissolve it in water, (the comprehensive effect of stirring and dissolving at 60°C is the best, ) to form a uniform and transparent sodium alginate aqueous solution, which was cooled to room temperature for use.

[0023] 2. Calcium chloride is used as the gelling cross-linking agent. Prepare a 0.5-1.5mol / L calcium chloride solution and store it for later use.

[0024] 3. Spray the sodium alginate solution obtained in step 1 into the calcium chloride solution obtained in step 2 with a spray device to form gel particles with high water content, and these gel particles react in the calcium chloride solution for 5 ~ 20 minutes, t...

Embodiment 1

[0031] Use pore-forming agent particles as aggregates (with a particle size between 2 and 3 mm), and add them to the cement slurry according to different volume percentages. After stirring, injection molding, and curing, the lightweight porous concrete test blocks are made. The comparison and test results are shown in the table below:

[0032] Table 1 Concrete formula and performance with aggregates as pore-forming agent particles

[0033]

[0034] 1. W / C in the table is water-cement ratio.

[0035] 2. Aggregate volume refers to the volume percentage of pore-forming agent particles or compound aggregates when they are piled up in the mould.

[0036] The prepared lightweight porous concrete test block has a 7-day compressive strength of 0.61-6.37Mpa, a 28-day compressive strength of 0.82-6.62Mpa, and a dry density of 472.7-881.7kg / m 3 between.

Embodiment 2

[0038] The pore-forming agent particles and expanded perlite particles are compounded as aggregates, and added to the cement slurry in different proportions and volume percentages. After stirring, injection molding and curing, the lightweight porous concrete test block is prepared. The specific proportion and the properties of the made lightweight porous concrete test block are shown in Table 2 and Table 3 below:

[0039] Table 2 Concrete ratio table with aggregates composed of pore-forming agent particles (A) and expanded perlite particles (B)

[0040]

[0041] Table 3 Concrete properties of aggregates composed of pore-forming agent particles (A) and expanded perlite particles (B)

[0042]

[0043] The 7-day compressive strength of the prepared lightweight porous concrete test block is between 2.33-5.71Mpa, the 28-day compressive strength is between 0.89-7.03Mpa, and the dry density is 534.5-896.73kg / m 3 between.

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Abstract

The invention relates to a method for preparing a light porous inorganic gelled material product from gel particles. The method comprises the following steps of: preparing pore former particles of which the particle sizes are between 0.5 and 5 millimeters from a natural linear polysaccharide polymer and a gelled cross-linking agent; and doping the pore former particles separately or together withexpanded perlite particles and polystyrene foam particles into an inorganic gel material in a compounding mode according to different proportions so as to obtain the light porous material product. The volume density, intensity, pore size and density distribution of the material can be conveniently adjusted by altering the particle size and mixing amount of the pore former particles. The heat conductivity coefficient of the prepared light porous material is only between 0.12 and 0.17 w / m.k and high heat preserving performance and high heat insulating performance are achieved. The material can be used for molding and manufacturing materials having requirements on light weight, heat preservation, heat insulation, sound insulation, energy conservation and the like. The preparation method has the advantages of simpleness, safety, low energy consumption and easy control and adjustment.

Description

technical field [0001] The invention relates to a method for preparing light-weight porous inorganic gelling material products with gel particles, which is used for making porous light-weight materials with thermal insulation and sound insulation properties. Background technique [0002] At present, my country's economy is developing rapidly. Under the premise of sustainable development strategy, all walks of life have put forward the requirements of energy saving and consumption reduction. As a new type of building material and thermal insulation material, lightweight porous material has excellent properties such as light weight, thermal insulation, sound insulation, anti-aging, and good fire resistance, and meets the increasingly emphasized green, environmental protection, and energy-saving requirements in recent years. At present, in addition to light aggregates, most lightweight and porous materials also use foaming aids for foaming during molding. Since the sample has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B28/14C04B38/08
Inventor 邱树恒张鲁湘陆宇兰
Owner GUANGXI UNIV
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