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Concrete anti-cracking repairing agent and concrete applying the same

A technology for concrete and repairing agent, applied in the field of concrete repairing agent and concrete, can solve the problems of easy cracking of concrete and poor self-repairing function of concrete crack resistance, so as to reduce the risk of cracking, shorten the setting time, and improve the workability. and overall effect

Inactive Publication Date: 2013-06-12
BEIJING ZHONGFANG YUANDA BUILDING MATERIALS SCI TECH COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] What the present invention aims to solve is that the anti-cracking self-repairing components in the prior art are still poor in improving the anti-cracking performance of concrete and realizing self-repairing functions, resulting in the problem that concrete is still prone to cracks under the action of external factors

Method used

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  • Concrete anti-cracking repairing agent and concrete applying the same
  • Concrete anti-cracking repairing agent and concrete applying the same
  • Concrete anti-cracking repairing agent and concrete applying the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The components and weight ratios of the concrete anti-crack repair agent provided in this embodiment are:

[0048] Calcium quicklime (calculated as calcium oxide), 20 parts;

[0049] Micro silica fume, 45 parts;

[0050] Sodium bentonite, 15 parts;

[0051] Calcium hydrogen phosphate, 15 parts;

[0052] Lithium carbonate, 2 parts;

[0053] The surface modifier is polynaphthaldehyde sulfonic acid sodium salt, 2 parts;

[0054] fiber, 1 serving;

[0055] The fibers are formed by mixing polypropylene fibers with a size of 1-10mm and polypropylene fibers with a size of 10-19mm, and the mass ratio of the polypropylene fibers with a size of 1-10mm to that of 10-19mm is 3:7. The polypropylene fiber was purchased from Wuhan Tianhui Fiber Material Co., Ltd.

[0056] The preparation steps of the concrete anti-crack repair agent described in the present embodiment are:

[0057] (1) Mix the above-mentioned bentonite and calcium oxide in proportion and dry them for later use;...

Embodiment 2

[0063] The combination and weight ratio contained in a kind of concrete anti-crack repair agent provided by the present embodiment are:

[0064] Calcium quicklime (calculated as calcium oxide), 30 parts;

[0065] Micro silica fume, 50 parts;

[0066] Sodium bentonite, 10 parts;

[0067] Calcium hydrogen phosphate, 5 parts;

[0068] Lithium carbonate, 3 parts;

[0069] Surface modifier, 1 part;

[0070] Fiber, 1 part; the fiber is formed by mixing polyacrylonitrile fiber with a size of 1-10mm and polyacrylonitrile fiber with a size of 10-19mm; the polyacrylonitrile fiber with a size of 1-10mm and polyacrylonitrile fiber with a size of 10-19mm The mass ratio of fibers is 2:5; the polyacrylonitrile fibers are purchased from Wuhan Tianhui Fiber Material Co., Ltd.

[0071] The preparation method of the concrete anti-crack repair agent is the same as in Example 1.

[0072] The concrete anti-crack repair agent can be configured with concrete with strength grades of C20, C30, C4...

Embodiment 3

[0076] The combination and weight ratio contained in a kind of concrete anti-crack repair agent provided by the present embodiment are:

[0077] Calcium quicklime (calculated as calcium oxide), 40 parts;

[0078] Micro silica fume, 15 parts;

[0079] Sodium bentonite, 20 parts;

[0080] Calcium hydrogen phosphate, 13 parts;

[0081] Lithium carbonate, 5 parts;

[0082] Surface modifier polynaphthalene sulfonic acid sodium salt, 5 parts;

[0083] The fiber is, 2 parts; the fiber is made of a mixture of alkali-resistant glass fiber with a size of 1-10mm and an alkali-resistant glass fiber with a size of 10-19mm, and the alkali-resistant glass fiber with a size of 1-10mm and alkali-resistant glass fiber with a size of 10-19mm The mass ratio of glass fibers is 1:1; the alkali-resistant glass fibers are purchased from Wuhan Tianhui Fiber Material Co., Ltd.

[0084] The preparation method of the concrete anti-crack repair agent is the same as in Example 1.

[0085] The concret...

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Abstract

The invention provides a concrete anti-cracking repairing agent and concrete applying the same. The repairing agent includes: 20-40% of calcium oxide, 15-50% of micro-silicon powder, 10-20% of bentonite, 5-15% of calcium hydrogen phosphate, 1-5% of lithium carbonate, 1-5% of a surface modification agent, and 0.1-2% of fiber. The components are simple. By controlling stress dispersion, regulating a hydration process, controlling crack generation during construction, and improving the reaction activity of an unhydrated gel material, a gel material hydrate can form under certain conditions so as to achieve anti-permeability and self-repair function of concrete cracks. The compressive strength and impervious grade of doped concrete are greatly improved, and the number of cracks also declines. Also, when the anti-cracking repairing agent is applied in concrete, the doping amount only accounts for 1-2% of the mass of the gel material.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a concrete repair agent widely used in industrial and civil buildings, agriculture, forestry and urban construction, transportation and seaports and other engineering facilities and concrete using the same. Background technique [0002] Concrete is an artificial stone made of cement and other cementitious materials, aggregates such as sand and stone, and water in an appropriate proportion, and then hardened after a certain period of time. Concrete has high hardness, durability, wide sources of raw materials, simple production methods, low cost, and is suitable for various natural environments. It is currently the most widely used bulk building material in engineering construction and has been widely used in construction, agriculture, forestry, and municipal construction. Road, bridge and seaport projects. However, concrete is a heterogeneous porous and brittle material with a l...

Claims

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Application Information

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IPC IPC(8): C04B24/22C04B28/00
Inventor 王明远刘会峰李成波
Owner BEIJING ZHONGFANG YUANDA BUILDING MATERIALS SCI TECH COMPANY
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