Anti-cracking low-shrinkage-deformation fiber-cement product and production method thereof

A technology of fiber cement and production methods, which is applied in the direction of chemical instruments and methods, layered products of hydraulically setting substances, layered products, etc., can solve the problems of ineffective control of surface microcracks, difficulty in reinforcing concrete dispersion, and ease of construction. Poor performance and other problems, to prevent separation and bleeding, to achieve dry maintenance, and good stability

Inactive Publication Date: 2012-11-21
NANJING BEILIDA NEW MATERIAL SYST ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, due to the difficulty in dispersing various fiber reinforced concretes and poor workability, the actual anti-cracking effect is average, especially the control effect on surface micro-cracks is not obvious.

Method used

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  • Anti-cracking low-shrinkage-deformation fiber-cement product and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0062] 1) Mix 25kg (25%) of cement, 24 kg (24%) of sand, 10kg (10%) of glass debris, 5kg (5%) of powdered pigment, 0.5kg (0.5%) of alumina-based ultra-short fiber, boric acid Aluminum ultra-short fiber 0.5kg (0.5%), PP fiber 2kg (2%), carbon fiber 3kg (3%), soap-free siloxane modified polypropylene emulsion 8kg (8%), water reducing agent naphthalene sulfonate formaldehyde condensation 1kg (1%) of food, 1kg (1%) of early strength agent sulfate, 0.5kg (0.5%) of antifreeze calcium chloride, 0.5kg (0.5%) of thickener hydroxypropyl methylcellulose, and expansion agent sulfur 4kg (4%) of aluminate, 5kg of metakaolin (5%) and 10kg of water (10%) are mixed according to the proportion by weight, and the flexible anti-crack surface layer mortar is made after stirring evenly.

[0063] 2) Make a decorative layer of the prepared surface mortar in the mold by spraying method, and let it cure naturally for 10 minutes;

[0064] 3) Cement 28kg (28%), sand 52kg (52%), PP fiber 1kg (1%), carbon...

Embodiment example 2

[0071] 1) Mix cement 45kg (45%), fine stones 30.5kg (30.5%), ceramic debris 10kg (10%), liquid pigment 3kg (3%), zirconia-based ultra-short fiber 0.3kg (0.3%), boric acid Magnesium-based ultra-short fiber 0.2kg (0.2%), PVA fiber 1kg (1%), glass fiber 2kg (2%), soap-free siloxane modified styrene-acrylic emulsion 5kg (5%), water reducing agent sulfonated melamine Formaldehyde condensate 0.5kg (0.5%), accelerator nitrite 0.5kg (0.5%), antifreeze agent potassium carbonate 0.5kg (0.5%), crystal expansion agent 1.5kg (1.5%), of which calcium: magnesium: silicon aluminum =2:5:3), 3kg of fly ash (3%), and 20kg of water (20%) are mixed according to the proportion of weight percentage, and the flexible anti-crack surface layer mortar is made after stirring evenly;

[0072] 2) Make a decorative layer in the mold with the prepared surface mortar by brushing method, and let it cure naturally for 20 minutes;

[0073] 3) Mix 34kg (34%) of cement, 46kg (46%) of sand, 2kg (2%) of glass fiber...

Embodiment example 3

[0080] 1) Mix 28kg (28%) of cement, 30kg (30%) of sand, 25kg (25%) of metal debris, 1kg (1%) of polycarboxylate (1%) of water reducing agent, 1kg (1%) of triethanolamine (1%) of early strength agent, antifreeze Sodium nitrite 0.5kg (0.5%), thickener hydroxyethyl cellulose 0.5kg (0.5%), expansion agent magnesia 1kg (1%) and water 13kg are mixed according to the following weight percentages, and stirred evenly Finally, it is made into flexible anti-crack surface mortar;

[0081] 2) Make a decorative layer in the mold with the prepared surface mortar by laying vibration method, and let it cure naturally for 30 minutes;

[0082] 3) Mix cement 30kg (30%), sand 46kg (46%), PVA fiber 2kg (2%), steel fiber 3kg (3%), glass fiber 2kg (2%), soap-free siloxane modified styrene-acrylic Emulsion 1.5kg (1.5%), water reducer sulfonated melamine formaldehyde condensate 0.5kg (0.5%), early strength agent nitrite 0.5kg (0.5%), antifreeze agent potassium carbonate 0.5kg (0.5%), expansion agent ...

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Abstract

The invention relates to an anti-cracking low-shrinkage-deformation fiber-cement product and a production method thereof. Concretely, a novel fiber-reinforced cement product with an excellent anti-cracking function and low shrinkage deformation is realized through an ultra-short fiber, low-elasticity-modulus short fiber and high-elasticity-modulus long-fiber composite reinforced-cement base material by simultaneously adopting high-efficiency additives (a high-efficiency water-reducing agent, a thickening agent, an expanding agent and the like). The product comprises a flexible anti-cracking surface layer and a fiber-reinforced cement structural layer, has a simple and resaonable structure, is convenient and easy in production construction and can be applied to projects, such as building external-wall decorative enclosure, indoor engineering construction as well as roads, bridges and the like with higher requirements on the strength and the durability of the cement base material.

Description

technical field [0001] The patent of the present invention relates to a crack-resistant low-shrinkage and deformation fiber cement product and a production method thereof. Specifically, fiber grading technology combined with high-efficiency admixture technology realizes a fiber cement product with crack resistance and low shrinkage deformation. The product application range includes building exterior wall decoration enclosure, interior engineering construction, and road, bridge and other constructions that have high requirements for the strength and durability of cement substrates. Background technique [0002] Fiber concrete is a new type of composite building material that is rapidly developing in the contemporary era. It is a general term for cement-based composite materials composed of cement paste, mortar or concrete as the base material and non-continuous short fibers or continuous long fibers as reinforcement materials. In fiber cement products, the main function of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B13/02
Inventor 熊吉如王杰王鹏程陶婷婷
Owner NANJING BEILIDA NEW MATERIAL SYST ENG
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