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A method for increasing the penetration depth of silane in concrete

A technology of penetration depth and concrete, applied in the field of concrete, to achieve the effect of improving durability, good effect and small impact

Inactive Publication Date: 2018-08-14
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is still a lack of simple methods at home and abroad that can effectively increase the penetration depth of silane in concrete.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) The surface of the formed concrete in the laboratory is relatively clean and complete, so there is no pretreatment;

[0024] (2) To prepare a solution of silane, uniformly mix isooctyltriethoxysilane and absolute ethanol, and the volume ratio of the two is 1:1;

[0025] (3) Place the concrete structure sample in the silane solution, and connect the internal steel bar to the negative electrode of the power supply with a wire. At the same time, put a 98% pure titanium mesh plate conductive electrode in the silane solution, and connect it The positive pole of the power supply forms the loop. Among them, the titanium mesh plate is arranged in parallel with the concrete structure, and the distance between the two is 30mm;

[0026] (4) Apply a constant voltage to the anode and cathode, the applied voltage is 12V, after 7 days of energization, end the energization.

[0027] The implementation results show that the silane penetration depth obtained by the method provided ...

Embodiment 2

[0029] (1) The surface of the formed concrete in the laboratory is relatively clean and complete, so there is no pretreatment;

[0030] (2) Prepare a solution of silane, uniformly mix isooctyltriethoxysilane and absolute ethanol, and the volume ratio of the two is 1.5:1;

[0031] (3) Place the concrete structure sample in the silane solution, and connect the internal steel bar to the negative electrode of the power supply with a wire. At the same time, put a 98% pure titanium mesh plate conductive electrode in the silane solution, and connect it The positive pole of the power supply forms the loop. Among them, the titanium mesh plate and the concrete structure are arranged in parallel, and the distance between the two is 30mm

[0032] (4) Apply a constant voltage to the anode and cathode, the applied voltage is 12V, after 7 days of energization, end the energization.

[0033] The implementation results show that the silane penetration depth obtained by the method provided by...

Embodiment 3

[0035] (1) The surface of the formed concrete in the laboratory is relatively clean and complete, so there is no pretreatment;

[0036] (2) To prepare a silane solution, add isobutyltriethoxysilane to a mixture of water and absolute ethanol (the volume ratio of water and absolute ethanol is 0.3), mix evenly, and the volume ratio of the two is 1:1;

[0037] (3) Place the concrete structure sample in the silane solution, and connect the internal steel bar to the negative electrode of the power supply with a wire. At the same time, put a 98% pure titanium mesh plate conductive electrode in the silane solution, and connect it The positive pole of the power supply forms the loop. Among them, the titanium mesh plate is arranged in parallel with the concrete structure, and the distance between the two is 30mm;

[0038] (4) Apply a constant voltage at the anode and cathode, the applied voltage is 15V, energize for 10d, and end the energization.

[0039] The implementation results sh...

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Abstract

A method for increasing a penetration depth of silane in concrete, relating to the technical field of concrete. The method comprises the following steps: pre-processing the surface of a concrete structure to make the surface of the concrete structure clean and complete; first mixing water with absolute ethanol, and uniformly dispersing silane in a mixture of ethanol and water to prepare a silane solution; placing a preprocessed concrete structure sample in the silane solution, connecting a reinforcing bar in the sample to a negative electrode of an external power source by means of a wire, placing a conductive electrode in the silane solution, and connecting the wire to a positive electrode of the power source so as to constitute a loop; and opening the power source and applying a constant voltage. A technique provided in the method utilizes electric principles such as electroosmosis and electromigration, effectively increases a penetration depth of silane in concrete by injecting silane into pores on a concrete structure, and thus improves the hydrophobic of a surface of the concrete structure and the durability of the concrete structure. The method is less affected by an environmental factor, has a simple process, is easy to operate, and has a good effect.

Description

technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to a method for increasing the penetration depth of silane in concrete so as to improve the surface hydrophobicity of the concrete. Background technique [0002] Reinforced concrete structure combines many advantages of steel bar and concrete, and the cost is low. It is the preferred form in the design of civil engineering structures and is widely used. However, the concrete structure is susceptible to deterioration during the service process due to various factors (such as chemical corrosion, alkali aggregate reaction, steel corrosion, freeze-thaw, etc.), thus shortening the service life of the reinforced concrete structure and causing serious damage to the national economy. Huge damage to people's lives and safety. [0003] Among various deterioration factors, water is an indispensable condition, so waterproofing concrete structures is one of the effective ways to im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/49
CPCC04B2111/27
Inventor 徐金霞单鸿猷张长宽蒋林华
Owner HOHAI UNIV