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Super-hydrophobic cement and using method thereof

A superhydrophobic and cement technology, which is applied in cement mixing devices, chemical instruments and methods, clay preparation devices, etc., can solve the problems of complex additive components and cumbersome processes, and achieve high added value of products, simple production processes, and good application prospects Effect

Inactive Publication Date: 2019-03-08
FUJIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention is to alleviate or solve the durability problem of cement concrete products caused by solution erosion, and at the same time overcome the problems of complex additive components and cumbersome processes in the existing superhydrophobic cement preparation methods

Method used

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  • Super-hydrophobic cement and using method thereof
  • Super-hydrophobic cement and using method thereof
  • Super-hydrophobic cement and using method thereof

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Embodiment 1

[0029] The preparation method of superhydrophobic cement in this embodiment selects raw materials that meet the product requirements, and weighs the materials according to the ratio of raw materials. The ratio is (weight ratio): 100 parts of ordinary Portland cement, 300 parts of standard sand, water 50 parts, 3.2 parts of polytetrafluoroethylene, fully mixed in the mixer; pour the cement slurry into the pre-mould, vibrate, ventilate, and maintain it in the natural environment for 20 hours, and demould after it is fully condensed; Curing and hardening in the natural environment to achieve the required strength index, that is, to obtain a new type of super-hydrophobic cement product, and the contact angle measured by the contact angle instrument is 151.6°.

Embodiment 2

[0031] The preparation method of the superhydrophobic cement in this embodiment selects the raw materials that meet the product requirements, and weighs the materials according to the ratio of the raw materials. The ratio is (weight ratio): 100 parts of ordinary Portland cement, 0 parts of standard sand, water 30 parts, 1.6 parts of polytetrafluoroethylene, fully mixed in a mixer;

[0032] Pour the cement paste into the pre-mold, vibrate, ventilate, and cure it in the natural environment for 24 hours. After it is fully condensed, it will be demoulded; further cured and hardened in the natural environment to achieve the required strength index, that is, a new type of super For hydrophobic cement products, the contact angle measured by a contact angle instrument is 142°.

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Abstract

The invention discloses super-hydrophobic cement. The super-hydrophobic cement is characterized by comprising the following components in parts by weight: 100 parts of cement and 0.5 to 4 parts of polytetrafluoroethylene micro powder, and the diameter of the polytetrafluoroethylene micro powder is 10 to 100 microns. A complex additive does not need to be added, the polytetrafluoroethylene micro powder can be spontaneously gathered to the surface of the cement product due to the effect of tension in the stirring process, the polytetrafluoroethylene micro powder is firmly adhered to the surfaceof the cement product after the cement is set and hardened, and simultaneously the cement product has surface super-hydrophobicity. Wastes are processed and recycled, the cost of the raw materials isrelatively low, the complex additive does not need to be added, surface coating treatment is not needed, and the cement is high in surface hydrophobicity, simple in production technology and high in product additional value and is applicable for large-scale product, so that the cement has obvious economic benefits and popularization and application values, and has preferable application prospect.

Description

technical field [0001] The field of building materials of the present invention, more specifically, relates to a superhydrophobic cement and its application method. Background technique [0002] Cement concrete has been the most important structural material in construction engineering since its inception, and has been widely used. With the advancement and development of science and technology and the improvement of people's awareness, cement concrete has opened up new uses and has entered the ranks of decorative materials. Cement concrete is a durable material, but it is essentially a heterogeneous porous material. Under the erosion of carbon dioxide, water, chloride ions, sulfate and other media, it is inevitably corroded by external factors. Concrete It will accelerate the damage and greatly shorten the service life. For example, the hydration product of Portland cement contains calcium silicate hydrate and calcium hydroxide. Calcium hydroxide is a necessary guarantee f...

Claims

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Application Information

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IPC IPC(8): C04B28/04B28B1/00B28B11/24B28C5/00C04B111/27
CPCB28B1/00B28B11/245B28C5/003C04B28/04C04B2111/27C04B24/2682C04B14/06
Inventor 花能斌廖振龙王乾廷陈文哲
Owner FUJIAN UNIV OF TECH