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Preparation method of inorganic concrete repairing material for transition zone of bridge expansion joints

A technology for repairing materials and expansion joints, applied in the field of building materials, can solve the problems of poor adhesion between old and new interfaces, repair failure, etc., and achieve the effect of avoiding product repair failure, improving bonding force, and alleviating dry shrinkage.

Inactive Publication Date: 2019-08-30
龙仕建
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the disadvantages of repair materials used in the transition zone of bridge expansion joints, which are prone to repair failure and poor adhesion to the old and new interfaces during long-term use, a preparation method for inorganic concrete repair materials in the transition zone of bridge expansion joints is provided.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025]In parts by weight, sequentially take 30 parts of nylon fiber long fibers, 80 parts of silicate, 40 parts of absolute ethanol, and 20 parts of fatty acid, and pour the silicate ester, anhydrous ethanol and fatty acid into a vacuum chamber with a reflux condenser first. In the three-necked flask, stir and mix with a glass rod for 20 minutes, then add nylon fiber long fibers to the three-necked flask, then move the three-necked flask to a water bath, heat to reflux for 5 hours, filter the materials in the three-necked flask, and collect the filter cake , and washed the filter cake with absolute ethanol for 5 times, and then transferred the washed filter cake into an oven, dried to constant weight at a temperature of 90 ° C, and discharged to obtain a coated modified nylon fiber long fiber; The obtained coated modified nylon long fibers were transferred into a tube furnace, and an inert gas was introduced into the furnace at a rate of 400 mL / min. After carbonization for 4 h...

example 2

[0027] In parts by weight, sequentially take 15 parts of nylon fiber long fibers, 15 parts of composite aggregate, 120 parts of cement, 80 parts of water, 3 parts of water reducing agent, and 6 parts of water-soluble carbonate, and pour them into a mixer. , After stirring and mixing for 45 minutes with a mixer at 400r / min speed, the material is discharged to obtain the inorganic concrete repair material in the transition zone of the bridge expansion joint. The nylon fiber long fibers are nylon fibers with a length of 20 mm and a diameter of 2 mm. The compound aggregate is composed of fine aggregate with an average particle size of 5 mm and coarse aggregate with an average particle size of 35 mm in a mass ratio of 3:1. The cement is Portland cement. The water-soluble carbonate is sodium carbonate.

example 3

[0029] In parts by weight, sequentially take 30 parts of nylon fiber long fibers, 80 parts of silicate, 40 parts of absolute ethanol, and 20 parts of fatty acid, and pour the silicate ester, anhydrous ethanol and fatty acid into a vacuum chamber with a reflux condenser first. In the three-necked flask, stir and mix with a glass rod for 20 minutes, then add nylon fiber long fibers to the three-necked flask, then move the three-necked flask to a water bath, heat to reflux for 5 hours, filter the materials in the three-necked flask, and collect the filter cake , and washed the filter cake with absolute ethanol for 5 times, and then transferred the washed filter cake into an oven, dried to constant weight at a temperature of 90 ° C, and discharged to obtain a coated modified nylon fiber long fiber; The obtained coated modified nylon long fibers were transferred into a tube furnace, and an inert gas was introduced into the furnace at a rate of 400 mL / min. After carbonization for 4 ...

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Abstract

The invention discloses a preparation method of an inorganic concrete repairing material for a transition zone of bridge expansion joints, and belongs to the technical field of building materials. Theproduct comprises self-made modified carbonized hollow filament, compound aggregate, cement, water, a water reducing agent and water-soluble carbonate, wherein the preparation method of the modifiedcarbonized hollow filament comprises the steps: mixing silicate, anhydrous ethanol and fatty acid uniformly and firstly, then adding nylon fiber filament, performing heating reflux for a reaction, performing filtration, washing and drying so as to obtain coated modified nylon fiber filament, performing slow heating carbonization on the coated modified nylon fiber filament under the protection of inert gas, then raising the temperature further, performing a high temperature reaction, performing cooling and material discharge so as to obtain carbonized hollow filament, mixing the carbonized hollow filament and a dopamine solution, adjusting the pH value to weak alkalinity, then introducing compressed air continuously, and then performing filtration, washing and drying so as to obtain the modified carbonized hollow filament.

Description

technical field [0001] The invention discloses a preparation method of an inorganic concrete repair material in the transition zone of a bridge expansion joint, and belongs to the technical field of building materials. Background technique [0002] Because bridge expansion devices are mostly located in municipal or highway node sections, it is impossible to close traffic maintenance for a long time. Limited by the repair time of bridge expansion joints, repair materials that can quickly build strength and restore traffic must be used. The research results of existing cement concrete repair materials at home and abroad can be divided into crack repair materials, thin-layer cover materials, grouting materials and full-thickness repair materials according to repair functions; according to the properties of repair materials, they can be divided into organic repair materials and inorganic repair materials. class of repair materials. The repair area is usually located on the old...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/72
CPCC04B28/04C04B2111/72C04B2201/50C04B14/386C04B2103/302C04B22/10C04B14/02
Inventor 龙仕建
Owner 龙仕建
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