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Method for preparing conductive fiber reinforced concrete base functional composite material

A technology of functional composite materials and conductive fibers, which is applied in the field of preparation of cement-based functional composite materials, can solve problems such as poor fiber dispersion, low electrical conductivity, and broken fibers, and achieve good fiber dispersion, good electrical conductivity, Effect of improved vibration damping performance

Inactive Publication Date: 2008-09-24
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a conductive fiber reinforced cement-based functional composite material in order to solve the problems of poor fiber dispersion, broken fibers, low electrical conductivity and poor functionality of the conductive fiber cement-based functional composite material prepared in the prior art. Material preparation method

Method used

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  • Method for preparing conductive fiber reinforced concrete base functional composite material

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specific Embodiment approach 1

[0007] Embodiment 1: In this embodiment, a method for preparing a conductive fiber reinforced cement-based functional composite material is realized according to the following steps: 1. Dissolve the conductive fiber dispersant in a volatile organic solvent to obtain a concentration of 0.1 to 10%. solution, and then add conductive fibers to the solution, magnetically stir and ultrasonically treat for 10-180 minutes to obtain a dispersed phase liquid of conductive fibers; 2. Add deionized water, superplasticizer, early strength agent, polymer emulsion, mineral After mixing with the cement mixing machine, put it into the insulating test mold, leveling and vibrating to prepare the cement slurry matrix; 3. Add the conductive fiber dispersion phase to the cement slurry matrix after the initial setting and before the final setting liquid, and apply a DC or AC electric field to the conductive fiber dispersed phase liquid for 1 to 3 hours, and obtain a composite body of cement matrix an...

specific Embodiment approach 2

[0008] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the conductive fiber in step one is a mixture of one or more of carbon fibers, conductive silver-plated fibers, conductive aluminum-plated fibers, conductive nanofibers, and carbon nanotubes . Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0009] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the conductive fiber dispersant in step one is methyl cellulose, carboxymethyl cellulose, carboxyethyl cellulose, nonylphenol polyoxyethylene ether, Arabica Glue, sodium dodecylbenzenesulfonate, sodium polyacrylate, cetyltrimethylammonium bromide or a mixture of several. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The present invention relates to a method for producing conductive-fiber cement-function-improved composite material, which resolves the problems of the prior art that the produced conductive-fiber cement-function-improved composite material has unfavorable disperse effect of the fiber, the fiber is easy to break, the electric conductivity is low and the function is poor. The preparation method comprises the steps: firstly, preparing the conductive fiber dispersion phase solution; secondly, preparing the cement pulp substrate; thirdly, adding the conductive fiber dispersion phase solution into the cement pulp substrate; fourthly, repeating the step two and the step three, and a billet with cement substrate being distributed with the conductive fiber at intervals is obtained, and the cement pulp substrate is poured on the upper surface of the billet; fifthly, after the poured cement pulp substrate is solidified, the die is removed, and the conductive-fiber cement-function-improved composite material can be obtained after the maintenance. The disperse effect of the fiber is good, and the fiber is free from being broken, and the conductivity is good, and the function of the material is favorable.

Description

technical field [0001] The invention relates to a preparation method of a cement-based functional composite material. Background technique [0002] Factors such as the type, nature, shape, size, dosage, compatibility with the cement matrix, and the composite method of the fiber conductive components in the conductive fiber cement-based functional composite material will affect the conductivity of the fiber cement-based functional composite material. properties, and micron-sized conductive fibers often entangle and agglomerate due to the small filaments and large specific surface area, so the dispersion of conductive fibers has always been a problem that plagues the performance research of fiber cement-based functional composites. At present, using physical ball milling, shearing mechanical stirring, ultrasonic oscillation, acid or alkali oxidation modification, surfactants and other treatment methods, the fibers can be well dispersed or even arranged in the cement slurry, bu...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B14/38C04B14/48
Inventor 段忠东罗健林
Owner HARBIN INST OF TECH
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