Method for constructing wear-resistant and crack-resistant hardened ground

A construction method and technology for hardening the ground, applied in the direction of floors, buildings, building structures, etc., can solve the problems of ground impermeability, poor durability, exposed steel bars, and peeling of hardened layers, etc., to achieve durability and resistance. The effect of improving the penetration ability, improving the finish and flatness, and improving the bonding fastness

Inactive Publication Date: 2010-11-17

中利建设集团有限公司

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AI-Extracted Technical Summary

Problems solved by technology

[0002] At present, the hardened ground of buildings such as modern industrial plants, shopping malls, exhibition halls, indoor parking lots and warehouses requires high wear resistance and crack resistance, and the ground needs to be hardened, wear-resistant, and crack-resistant. The overall cast-in-place ground is cracked, and the construction method of laying steel me...

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Abstract

The invention discloses a method for constructing wear-resistant and crack-resistant hardened ground, which is applied to hardened ground of buildings such as modern industrial factory buildings, shopping malls, exhibition buildings, indoor parking lots, warehouses and the like. The method sequentially comprises the following steps of: brushing slurry on the surface of a base layer, namely watering to wet and clean the base layer and uniformly brushing a layer of 801 glue-doped cement slurry on the surface of the base layer; pouring, compacting and trowelling a polypropylene fiber concrete floor with the thickness of 50mm, removing bubbles and free water from the polypropylene fiber concrete by using a vacuum water absorption device, and removing laitance on the surface of the concrete after the concrete is initially set; laying a hardened wear-resistant layer and trowelling for 1 to 2 hours; calendaring by using a trowelling machine; and spreading a layer of BZK-15 surface liquid molded concrete curing agent to cure the ground. The hardened ground poured by the construction method has the characteristics of high durability, permeability resistance and crack resistance, and low construction cost.

Application Domain

Flooring

Technology Topic

Cement slurryWear resistant +10

Examples

Experimental program(1)

Example Embodiment

[0023] The present invention is described in further detail below:

[0024] A wear-resistant, crack-resistant and hardened ground construction method, comprising the following steps in sequence:

[0025] 1) Surface treatment of the base layer: Wet and clean the floor by sprinkling water, first grind the surface of the base layer into a rough surface with a scraper, and then evenly apply a layer of cement slurry mixed with 801 glue for sweeping treatment. The 801 glue is Zhongnan brand, Originated in Shanghai, the weight ratio of 801 glue to cement slurry is 1:2.

[0026] 2) Die support for sub-silo: Set up glass strip compartments, the direction of the die is consistent, not criss-cross, and the width of the die in the sub-silo should be 4m ~ 6m strip interval.

[0027] 3) Pouring polypropylene fiber concrete floor with a thickness of 50mm: pour it according to the compartment, use steel rollers to roll and flatten it repeatedly, use a vacuum water absorption device to remove the air bubbles and free water in the polypropylene fiber concrete, and cure for 1h to 3h After the initial setting, use an electric trowel with an abrasive disc to remove the laitance on the concrete surface.

[0028] Among them: the content of polypropylene fiber in polypropylene fiber concrete is: 0.88Kg/m 3 , Select WKX polypropylene bundle monofilament fiber produced by Shenzhen Weitenai Company, its fineness is 0.8dtex ~ 15dtex, and its length is 35mm ~ 45mm.

[0029] The preparation process of unit cubic polypropylene fiber concrete is carried out according to the following steps: Accurately weigh 627Kg of medium sand or coarse sand, the mud content in the sand is less than or equal to 3%, weigh 638Kg of crushed stone, and the particle size of the mud and crushed stone is 20mm~40mm, containing The mud amount is less than or equal to 2%, weigh 254Kg of No. 525 low-alkali silicate water, weigh 0.88Kg of polypropylene fiber, pour the sand, cement, low-alkali Portland cement and polypropylene fiber into the hopper of the mixer, and dry it by the mixer. After stirring for 30s~60s, add water and stir for 1.5min~2min, and then discharge.

[0030] 4) Lay a 5mm thick hardened wear-resistant layer: After the initial setting of the concrete (specifically, the footprint of 3mm left by light pedestrians), the total amount of spreading and application is 5Kg/m2 2 First, apply a total amount of 1/2 to 2/3 of the hardened wear-resistant agent evenly spread on the surface of the initial setting polypropylene fiber concrete in the delineated area, and complete the first layer of spreading operation. The abrasive absorbs water and wets it evenly, and the surface becomes dark. Use a wooden trowel or an electric trowel with an abrasive disc to smooth it evenly. Then, spread the remaining 1/3 to 1/2 of the hardened abrasion On one layer, the second spreading operation is completed, and after it is evenly wetted, it is evenly compacted and troweled with a disc trowel.

[0031] The hardening and wear-resistant agent is composed of the following components by weight: 30% of No. 525 Portland cement, 62% of No. 15 emery wear-resistant aggregate, 2% of hardener, and 6% of pigments and fillers. It is composed of one of German powder, iron red, iron yellow, chrome green, phthalocyanine blue and phthalocyanine green or their mixture, and the hardener is made of Jiangsu Perney brand.

[0032] 5) Finishing: 1h to 2h after troweling, use a blade trowel with an inclined blade angle to perform the finishing operation.

[0033] 6) Ground maintenance: 1h ~ 6h after the light is collected, spread a layer of BZK-15 surface liquid forming concrete curing agent produced by Beijing Zankai Building Materials Co., Ltd., which can form a high-performance water-blocking film on the concrete surface to prevent The surface water evaporates rapidly, so that it can be cured naturally. The curing time: no less than 7 days, to ensure the steady growth of the strength of the hardened wear-resistant layer.

[0034] 7) Unloading: The unloading operation is carried out on the second day after the construction of the hardened wear-resistant platform is completed.

[0035] 8) Finished product protection and activation: Strictly protect the ground that has been done, the activation time depends on the ambient temperature, usually 24h ~ 48h can walk, 7 days ~ 10 days can bear light load, after 28 days can be used normally.

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PUM

Property	Measurement	Unit
Thickness	50.0	mm
Thickness	5.0	mm
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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Classification and recommendation of technical efficacy words

Improve bonding fastness
Shorten construction time

Method for constructing wear-resistant and crack-resistant hardened ground

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

PUM

Description & Claims & Application Information

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