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Light solid inner mold for hollow floor and preparation method of light solid inner mold

A hollow floor and lightweight technology, applied in the field of building materials, can solve the problems of difficult processing of special-shaped inner molds, poor sound insulation and heat preservation effects, and failure of hollow inner molds, etc., achieving low cost, high production efficiency, and low production costs Effect

Inactive Publication Date: 2015-06-10
ZHENGZHOU CHUN MAI ENERGY SAVING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In hollow-core slabs, lightweight internal molds are a necessity, and they are permanently placed in the floors, which also determines the pouring quality of hollow-core slabs; at present, the industry mostly uses GRC cavity internal molds, but their own weight (400~ 500kg / m 3 ), the special-shaped inner mold is not easy to process, the production efficiency is low, and the damage rate is high during production, transportation and construction. During construction, the concrete slurry is easy to penetrate into the hollow inner mold from the worn part, so that the hollow inner mold cannot play its due role. In this way, it is easy to increase the self-weight of the floor, causing hidden dangers in the project, and its sound insulation effect is poor

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  • Light solid inner mold for hollow floor and preparation method of light solid inner mold

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Embodiment 1

[0023] A lightweight solid inner mold for a hollow floor, the preparation slurry of which is made of the following raw materials in parts by weight: 70 parts of cement, 27 parts of fly ash, and 3 parts of small materials, and the small materials are mixed with the following raw materials in weight percentages Made: 6% carbon black, 45% gypsum, 18% silica fume, 7% quicklime, 12% diatomaceous earth, 8% calcium stearate, 4% fiber.

[0024] The fiber is polypropylene fiber with a length of 0.9-1.2 cm; the cement is PO ordinary Portland cement No. 42.5; the fineness of the fly ash is ≥325 mesh; the fineness of the silica fume is ≥600 mesh; The carbon black is water-soluble carbon black with fineness ≥ 800 mesh. The strength of gypsum increases rapidly in the early stage, which can achieve the effect of stabilizing foam. Quicklime plays the role of limiting the size and number of cells, and silica fume plays the role of increasing strength and reducing cracks.

[0025] The prepara...

Embodiment 2

[0058]A lightweight solid inner mold for a hollow floor, the preparation slurry includes the following raw materials in parts by weight: 65 parts of cement, 22 parts of fly ash, and 2 parts of small materials, and the small materials are made by mixing the following raw materials in weight percentages : Carbon black 5%, gypsum 48%, silica fume 16%, quicklime 8%, diatomaceous earth 10%, calcium stearate 10%, fiber 3%.

[0059] The fiber is polypropylene fiber with a length of 0.9-1.2 cm; the cement is PO ordinary Portland cement No. 42.5; the fineness of the fly ash is ≥325 mesh; the fineness of the silica fume is ≥600 mesh; The carbon black is water-soluble carbon black with fineness ≥ 800 mesh.

[0060] The preparation method of the lightweight solid inner mold of the hollow floor of the present embodiment comprises the following steps :

[0061] (1) Prepare raw materials according to the weight ratio;

[0062] (2) Add water heated to 40°C to the No. 1 agitator, start stir...

Embodiment 3

[0067] A lightweight solid inner mold for a hollow floor, the preparation slurry includes the following raw materials in parts by weight: 75 parts of cement, 32 parts of fly ash, and 4 parts of small materials, and the small materials are made by mixing the following raw materials in weight percentages : Carbon black 8%, gypsum 42%, silica fume 20%, quicklime 6%, diatomaceous earth 13%, calcium stearate 6%, fiber 5%.

[0068] The fiber is polypropylene fiber with a length of 0.9 to 1.2 cm; the cement is No. 42.5 ordinary Portland cement; the fineness of the fly ash is ≥325 mesh; the fineness of the silica fume is ≥600 mesh; The carbon black is water-soluble carbon black with fineness ≥ 800 mesh.

[0069] The preparation method of the lightweight solid inner mold of the hollow floor of the present embodiment comprises the following steps:

[0070] (1) Prepare raw materials according to the weight ratio;

[0071] (2) Add water heated to 50°C into No. 1 agitator, start stirring...

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Abstract

The invention relates to a light solid inner mold for a hollow floor and a preparation method of the light solid inner mold. Slurry for preparing the light solid inner mold for the hollow floor comprises the following raw materials in parts by weight: 65-75 parts of cement, 22-32 parts of coal ashes and 2-4 seasonings; the seasonings are prepared by mixing the following raw materials in percentage by weight: 5%-8% of carbon black, 42%-48% of gypsum, 16%-20% of silica fume, 6%-8% of quicklime, 10%-15% of kieselguhr, 6%-10% of calcium stearate and 3%-5% of a fiber. Compared with a traditional hollow inner mold, the light solid inner mold disclosed by the invention has the obvious advantages of small dead weight (200-300kg / m<3>), high strength, good sound insulation and thermal insulation effects, no slurry leakage, low production cost, and high production efficiency. The preparation method is simple in technological process, low in cost, and high in capacity, stable in quality and free of an effect caused by outdoor air temperature, and can be applied to indoor full-automatic production.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a lightweight solid inner mold for a hollow floor and a preparation method thereof. Background technique [0002] The hollow floor is a kind of cast-in-place reinforced concrete floor, also known as the cast-in-place beamless hollow floor. It is a hollow beam-free floor that is cast-in-place after setting the internal mold products according to certain rules. It is suitable for cast-in-place reinforced concrete. Or prestressed reinforced concrete floors, roofs, walls, foundation slabs and bridges. Hollow floor technology is a major innovation in the field of building structures in my country. It provides technical support for the modernization of buildings in the 21st century. It is a high-tech structural system with superior performance and price and more in line with human nature. It has huge social and economic value. [0003] In hollow-core slabs, ligh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/08C04B22/14
CPCY02W30/91
Inventor 杨柏祥张玉青杨海航
Owner ZHENGZHOU CHUN MAI ENERGY SAVING TECH