Concrete construction material for spraying

A concrete construction, magnesium oxide technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as lack

Inactive Publication Date: 2009-04-15
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies in the prior art, to provide a concrete building material for spraying, so that it can solve the problems existing in the construction of the existing façade and wall body, which lack direct sp

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Each component and weight percentage thereof are in the present embodiment:

[0030] Magnesium Oxide 7%

[0031] Monopotassium Phosphate 35%

[0032] Quartz sand 30%

[0033] Fly Ash 25%

[0034] Boric acid 1%

[0035] Calcium Lignosulfonate 2%

[0036] Among them, the quartz sand is commercially available construction sand, which conforms to the following gradation:

[0037] 2.500~5.000mm 5% weight ratio

[0038] 1.250~2.500mm 25% weight ratio

[0039] 0.315~1.250mm 55% weight ratio

[0040] <0.315mm 15% by weight.

[0041] The above components are prepared according to the aforementioned process to prepare dry powder of sprayed concrete. At the construction site, 1% of the mass of the powder used is added with polypropylene fiber and fully mixed, and then 0.25% of the mass of the powder is added. Tap water is stirred for 3 minutes to obtain a flowable of slurry. It is sprayed on a wall made of EPS insulation board through spraying equipment, and the spraying...

Embodiment 2

[0045] Each component and weight percentage thereof are in the present embodiment:

[0046] Magnesium Oxide 13%

[0047] Potassium dihydrogen phosphate 25%

[0048] Quartz sand 45%

[0049] Fly Ash 15%

[0050] Citric acid 1%

[0051] Calcium lignosulfonate 1%

[0052] Among them, the quartz sand is commercially available construction sand, which conforms to the following gradation:

[0053] 2.500~5.000mm 0% weight ratio

[0054] 1.250~2.500mm 35% weight ratio

[0055] 0.315~1.250mm 55% weight ratio

[0056] <0.315mm 10% by weight.

[0057]The above components are prepared according to the aforementioned process to prepare dry powder for spraying concrete. At the construction site, 0.20% of the mass of the powder used is added to tap water and stirred for 3 minutes to obtain a flowable slurry. It is sprayed on a wall made of EPS insulation board through spraying equipment, and the spraying is completed within 30 minutes without slurry falling into the ground. After o...

Embodiment 3

[0061] Each component and weight percentage thereof are in the present embodiment:

[0062] Magnesium Oxide 10%

[0063] Potassium dihydrogen phosphate 30%

[0064] Quartz sand 37%

[0065] Fly Ash 20%

[0066] Borax 1.5%

[0067] Sodium lignosulfonate 1.5%

[0068] Among them, the quartz sand is commercially available construction sand, which conforms to the following gradation:

[0069] 2.500~5.000mm 2% weight ratio

[0070] 1.250~2.500mm 20% weight ratio

[0071] 0.315~1.250mm 65% weight ratio

[0072] <0.315mm 13% by weight.

[0073] The above components are prepared according to the aforementioned process to prepare dry powder for spraying concrete. At the construction site, 0.20% of the mass of the powder used is added to tap water and stirred for 3 minutes to obtain a flowable slurry. It is sprayed onto a wall made of wood boards through spraying equipment, and the spraying is completed within 30 minutes without slurry falling into the ground. After observatio...

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Abstract

The invention discloses a concrete building material used for spraying, which has the components with the weight percent of 7-13 percent of magnesia, 25-35 percent of monopotassium phosphate, 15-45 percent of quartz sand, 15-25 percent of fly ash, 1-2 percent of boric acid or borax or citric acid and 1-2 percent of calcium lignosulphonate or sodium lignosulphonate. The material can be directly used for spraying on an EPS heat insulating plate to form a heat insulating system, so as to be used as a wall body, and the material has excellent bonding performance with the EPS heat insulating plate. The wall surface sprayed by the material has favorable waterproof, fireproof performances and favorable mechanical performance and greatly shortens the construction period.

Description

technical field [0001] The invention relates to a sprayed concrete in the technical field of building materials, in particular to a concrete building material used for spraying. Background technique [0002] At present, the construction of concrete materials is usually realized by pouring, which brings inconvenience to its construction in some special environments and occasions, especially the construction of some facade walls and tunnel engineering. Although shotcrete has been used in some projects such as tunnels for many years, the phenomenon of ash falling and shedding during the spraying process is relatively serious, resulting in serious loss of slurry and a great impact on the environment. Moreover, shotcrete is only limited to projects such as tunnels, and is rarely seen in projects such as civil houses. The materials used for wall spraying are usually only limited to some decorative coatings, such as patent publication number: 02115354.X, patent name: polymer cemen...

Claims

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Application Information

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IPC IPC(8): C04B28/30C04B14/06C04B22/16C04B18/08C04B24/18
CPCC04B28/34C04B2111/28C04B2111/00534C04B2111/27C04B41/5092C04B2111/00577Y02W30/91C04B14/06C04B14/304C04B18/08C04B22/0013C04B24/18C04B24/06
Inventor 陈兵陈龙珠
Owner SHANGHAI JIAO TONG UNIV
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