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Insulation mortar reinforced by desulfurized gypsum whiskers and preparation method thereof

A technology of desulfurized gypsum and thermal insulation mortar, applied in the field of building thermal insulation materials, can solve the problems of desulfurized gypsum occupying land, poor bonding ability, high thermal conductivity, etc., and achieve the effects of reducing the risk of cracking, reducing bulk density and small bulk density

Active Publication Date: 2021-01-05
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Technical problem: In order to solve the above problems, the present invention provides a thermal insulation mortar reinforced with desulfurized gypsum whiskers and a preparation method thereof. The desulfurized gypsum is processed into desulfurized gypsum whiskers, which are mixed into the thermal insulation mortar to enhance the performance of the thermal insulation mortar , to overcome the disadvantages of low mortar strength, poor bonding ability, large drying shrinkage, easy cracking, and high thermal conductivity in the prior art, and at the same time make full use of desulfurized gypsum, which solves the problems of desulfurized gypsum occupying land and polluting the environment to a certain extent

Method used

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  • Insulation mortar reinforced by desulfurized gypsum whiskers and preparation method thereof
  • Insulation mortar reinforced by desulfurized gypsum whiskers and preparation method thereof
  • Insulation mortar reinforced by desulfurized gypsum whiskers and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A thermal insulation mortar reinforced by desulfurized gypsum whiskers, consisting of the following components in parts by mass:

[0035]

[0036] CaSO in the said construction gypsum powder 4 0.5H 2 The mass percentage of O is 96%, its 2-hour bending resistance is 2.5 MPa, and 2-hour compression resistance is 8 MPa.

[0037] Described Portland cement is 42.5 grade Portland cement, specific surface area is 320m 2 / kg.

[0038] The desulfurized gypsum whiskers have a diameter of 0.5 μm, a length of 40 μm, an aspect ratio of 80, and a bulk density of 120 kg / m 3 .

[0039] The particle size of the expanded perlite is 2mm, and the bulk density is 80kg / m 3 .

[0040] The latex powder is 5406P latex powder, with a mass percentage of ≥98% and a fineness of 0.5-6 μm.

[0041] The air-entraining agent is sodium dodecylbenzenesulfonate.

[0042] The water retaining agent is hydroxyethyl methyl cellulose ether.

[0043] Described retarder is sodium citrate.

[0044] A...

Embodiment 2

[0048] A thermal insulation mortar reinforced by desulfurized gypsum whiskers, consisting of the following components in parts by mass:

[0049]

[0050] CaSO in the said construction gypsum powder 4 0.5H 2 The mass percentage of O is 96%, its 2-hour bending resistance is 2.5 MPa, and 2-hour compression resistance is 8 MPa.

[0051] Described Portland cement is 42.5 grade Portland cement, specific surface area is 320m 2 / kg.

[0052] The desulfurized gypsum whiskers have a diameter of 0.5 μm, a length of 40 μm, an aspect ratio of 80, and a bulk density of 120 kg / m 3 .

[0053] The particle size of the expanded perlite is 2mm, and the bulk density is 80kg / m 3 .

[0054] The latex powder is 5406P latex powder, with a mass percentage of ≥98% and a fineness of 0.5-6 μm.

[0055] The air-entraining agent is sodium dodecylbenzenesulfonate;

[0056] The water retaining agent is hydroxyethyl methyl cellulose ether.

[0057] The retarder is sodium citrate.

[0058] A method ...

Embodiment 3

[0062] A thermal insulation mortar reinforced by desulfurized gypsum whiskers, consisting of the following components in parts by mass:

[0063]

[0064] CaSO in the said construction gypsum powder 4 0.5H 2 The mass percentage of O is 96%, its 2-hour bending resistance is 2.5 MPa, and 2-hour compression resistance is 8 MPa.

[0065] Described Portland cement is 42.5 grade Portland cement, specific surface area is 320m 2 / kg.

[0066] The desulfurized gypsum whiskers have a diameter of 1 μm, a length of 70 μm, an aspect ratio of 70, and a bulk density of 150 kg / m 3 .

[0067] The particle size of the expanded perlite is 4mm, and the bulk density is 75kg / m 3 .

[0068] The desulfurized gypsum whiskers have a diameter of 0.4-2 μm, a length of 40-300 μm, an aspect ratio of 30-100, and a bulk density of 120-200 kg / m 3 .

[0069] The particles of the expanded perlite are evenly distributed, the particle size is 2-5 mm, and the bulk density is 70-80 kg / m 3 .

[0070] The...

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Abstract

The invention discloses thermal mortar reinforced through desulfurized gypsum whiskers and a preparation method thereof. The thermal mortar is prepared from, in parts by mass: 20-39 parts of buildinggypsum powder, 22-30 parts of Portland cement, 15-20 parts of desulfurized gypsum whiskers, 20-40 parts of expanded perlite, 0.65-0.9 part of emulsion powder, 0.6-0.9 part of air entraining agent, 0.15-0.225 part of water-retaining agent, 0.1-0.5 part of retarder and 60-65 parts of water. The above raw materials are evenly mixed, water is added and stirred, and the thermal mortar is obtained. thetechnology procedure is simple, the desulfurized gypsum whiskers are applied to the thermal mortar, the prepared thermal mortar is high in strength, the adhesion ability is good, air shrinkage is low,the thermal conductivity coefficient is low, the production cost of the thermal mortar is reduced, and the problems that the desulfurized gypsum occupies the land, and the environment is polluted aresolved to some extent.

Description

technical field [0001] The invention relates to a thermal insulation mortar reinforced by desulfurized gypsum whiskers and a preparation method thereof, belonging to the field of building thermal insulation materials. Background technique [0002] In recent years, due to the serious phenomenon of energy waste, the proportion of building energy consumption in the total energy consumption of society has been increasing. The development of energy-saving building thermal insulation mortar has a huge effect on reducing building energy consumption. At the same time, the processing and utilization of some industrial solid wastes into thermal insulation mortar will also be a trend in the development of new thermal insulation mortar. Desulfurization gypsum is a common industrial solid waste that occupies land and pollutes the environment. After the desulfurization gypsum and desulfurization gypsum are processed, they are mixed into the thermal insulation mortar, which not only reduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/20C04B2201/32C04B2201/50C04B18/16C04B14/38C04B14/185C04B24/24C04B2103/304C04B2103/465C04B2103/22
Inventor 高建明韩龙陈雪梅唐永波吴叶
Owner SOUTHEAST UNIV