A phosphogypsum-based thermal insulation mortar containing expanded perlite

A technology of expanded perlite and thermal insulation mortar is applied in the field of comprehensive utilization of solid waste and building materials, which can solve the problems of poor frost resistance and water resistance, limited bonding ability of substrates and high thermal conductivity, and achieves low production cost, Improved quality and low thermal conductivity

Inactive Publication Date: 2016-05-11
GUIZHOU KAILIN PHOSPHOGYPSUM INTEGRATION UTILIZATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides a phosphogypsum-based thermal insulation mortar containing expanded perlite, which overcomes the problems of low high strength, limited bonding ability with the base material, large drying shrinkage, easy cracking, and anti-corrosion properties in the prior art. Poor frost resistance, high thermal conductivity, hollowing, poor frost resistance and water resistance, low heat preservation ability, poor sound insulation effect, high production cost, etc.

Method used

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  • A phosphogypsum-based thermal insulation mortar containing expanded perlite
  • A phosphogypsum-based thermal insulation mortar containing expanded perlite
  • A phosphogypsum-based thermal insulation mortar containing expanded perlite

Examples

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Effect test

Embodiment 1

[0024] The raw material composition and parts by weight of the phosphogypsum-based thermal insulation mortar containing expanded perlite are shown in Table 1:

[0025] Table 1

[0026] Raw material serial number raw material name Raw material parts by weight 1 expanded perlite 800 2 plaster of construction 70 3 modifier 14.8 4 retarder 0.1 5 Cellulose Ether Mixture 0.1

[0027] Among them, building gypsum is made by calcination of phosphogypsum produced by wet-process phosphoric acid production. The specific steps are as follows: firstly, phosphogypsum is calcined at 210°C for 2 hours, aged for 5 days to make β hemihydrate gypsum, and the phosphogypsum is processed into Calcined at 355°C for 1 hour to make Type II anhydrous gypsum, then mix β hemihydrate gypsum with anhydrite at a mixing ratio of 3:1.

[0028] The modifier is composite yellow phosphorus slag powder.

[0029] The retarder is a mixture of zinc chloride, sodiu...

Embodiment 2

[0033] The raw material composition and parts by weight of the phosphogypsum-based thermal insulation mortar containing expanded perlite are shown in Table 2:

[0034] Table 2

[0035] Raw material serial number raw material name Raw material parts by weight 1 expanded perlite 1000 2 plaster of construction 74 3 modifier 16.4 4 retarder 0.13 5 Cellulose Ether Mixture 0.15

[0036] Among them, building gypsum is made by calcination of phosphogypsum produced by wet-process phosphoric acid production. Specifically, the phosphogypsum is calcined at 195°C for 2.5 hours, aged for 4 days to make β hemihydrate gypsum, and the phosphogypsum Calcined at 345°C for 2 hours to make type II anhydrite, then mix β hemihydrate gypsum with anhydrite, the mixing ratio is 4:1.

[0037] The modifier is composite yellow phosphorus slag powder.

[0038] The retarder is a mixture of zinc chloride, sodium borate, sodium hexametaphosphate, sodium tr...

Embodiment 3

[0042] The raw material composition and parts by weight of the phosphogypsum-based thermal insulation mortar containing expanded perlite are shown in Table 3:

[0043] table 3

[0044] Raw material serial number raw material name Raw material parts by weight 1 expanded perlite 1200 2 plaster of construction 76 3 modifier 17.6 4 retarder 0.15 5 Cellulose Ether Mixture 0.17

[0045] Among them, building gypsum is made by calcination of phosphogypsum produced by wet-process phosphoric acid production. Specifically, the phosphogypsum is calcined at 198°C for 2.53 hours, aged for 4 days to make β hemihydrate gypsum, and the phosphogypsum Calcined at 348°C for 1.5 hours to make Type II anhydrous gypsum, then mix β hemihydrate gypsum with anhydrite at a mixing ratio of 3.5:1.

[0046] The modifier is composite yellow phosphorus slag powder.

[0047] The retarder is a mixture of zinc chloride, sodium borate, sodium hexametaphosphat...

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Abstract

The invention discloses a phosphogypsum-based thermal insulating mortar containing expanded perlite, and belongs to the solid waste comprehensive utilization and building material technical fields. The thermal insulating mortar includes expanded perlite and a material A which is prepared from phosphogypsum, wherein the mass ratio is 1:8-17. The expanded perlite are used in large amounts, and the weight specific gravity of the expanded perlite is far greater than that of the material A prepared from the phosphogypsum, so that the phosphogypsum-based thermal insulating mortar has the characteristics of low thermal conductivity, good thermal insulating and sound insulating effects, energy saving, low production cost, and no toxicity and no pollution, and is convenient to achieve thermal isolation and sound insulation of the construction; and at the same time, the phosphogypsum-based thermal insulating mortar is subjected to product testing according to ''thermal insulating mortar for buildings'' (GB / T20473-2006) standards; and results comprise the packing density is less than 350 kg / m<3>, the compressive strength is greater than 0.4 MPa, and the radioactivity specific activity degree simultaneously meets related indicator requirements that an inner illumination index and an outer illumination index are both less than 1.0.

Description

technical field [0001] The invention belongs to the technical field of solid waste comprehensive utilization and building materials, and in particular relates to a phosphogypsum-based thermal insulation mortar containing expanded perlite. Background technique [0002] In new energy-saving buildings and energy-saving renovation of existing buildings, the method of hanging polystyrene foam insulation board + glass fiber mesh cloth + plastering mortar on the exterior wall is usually adopted, but due to the fire performance of polystyrene foam insulation board Poor, hundreds of fire accidents have occurred in many cities in China, and this construction method will soon be eliminated by the country. Therefore, painting inorganic phosphogypsum-based thermal insulation mortar on external walls or pasting inorganic thermal insulation boards is a method that can achieve energy-saving thermal insulation, It is a good way to avoid fire accidents, and the construction is simple. In the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B14/18
Inventor 杨步雷向前勇胡新菊李泽钢王伟
Owner GUIZHOU KAILIN PHOSPHOGYPSUM INTEGRATION UTILIZATION
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