Composite mortar mixed with carbon fiber and nano-silica and its preparation process and application
A technology of nano-silica and composite mortar, applied in the field of building materials, can solve problems such as large discreteness, and achieve the effect of small discreteness of resistivity, improved compressive strength, and promotion of dispersion.
Active Publication Date: 2018-01-09
DALIAN UNIV OF TECH
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Problems solved by technology
In addition, the uneven dispersion of carbon fibers will also make the resistivity of carbon fiber composite cement-based materials discrete even under the same ratio.
Method used
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Embodiment 1-3
[0029] Example 1-3 Composite mortar mixed with carbon fiber and nano-silica
[0030] Table 1 Weight Ratio of Raw Materials
[0031]
[0032] (1) Take the raw materials in the ratio described in Table 1; add water, water reducer, carbon fiber and nano-silica to the container, stir evenly, and ultrasonically 30min at 25°C to obtain a mixture, cool to normal temperature; then Add the mixture, cement, and standard sand into the cement mortar mixing pot, and stir evenly to obtain the mixture;
[0033] (2) pour the mixture into a mold (40mm×40mm×160mm), then place the mold on a vibrating table and vibrate for 20 seconds;
[0034] (3) According to the size of the mixture in the mold, insert electrodes for connecting external circuits (such as Figure 4 shown), vibrate for 10 seconds;
[0035] (4) Put the mold into the curing box, maintain it for 24 hours at a temperature of 20±1°C and a humidity greater than 95%, and then remove the mold to obtain a test piece.
[0036] Curing...
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Abstract
The invention discloses a composite mortar compounded with carbon fiber and nano-silica and a preparation process thereof. Taking raw materials in weight ratio, adding water, water reducing agent, carbon fiber and nano-silica into a container, stirring evenly, at a temperature not higher than Ultrasound at 30°C for 25-35 minutes to obtain the mixture, then add the mixture, cement and sand into the cement mortar mixing pot, stir evenly to obtain the mixture; pour the mixture into the mold, and then Place the mold on a vibrating table and vibrate until slurry emerges on the surface; insert electrodes for connecting external circuits according to the size of the mixture in the mold; vibrate again; put the mold into a curing box at a temperature of 20±1°C After 24 hours of curing under the condition of humidity greater than 95%, the formwork was removed to obtain the test piece. The present invention combines the advantages of both nano-silica and carbon fiber, utilizes the self-reinforcement mechanism of nano-silica and carbon fiber and the mutual synergistic promotion and reinforcement, and finally prepares a composite material with good flexural and compressive properties and a small coefficient of variation of resistivity. Composite mortar mixed with carbon fiber and nano-silica.
Description
technical field [0001] The invention relates to the technical field of building materials, in particular to a composite mortar compounded with carbon fiber and nano silicon dioxide and a preparation process thereof. Background technique [0002] As the reinforcing fiber of a new generation of cement-based composite materials, carbon fiber has become an ideal cement-based reinforcing material because of its excellent characteristics such as low density, high tensile strength, corrosion resistance, and good electrical and thermal conductivity. Adding chopped carbon fibers to cement-based composites can not only significantly improve the mechanical properties of cement-based composites such as shear strength and elastic modulus, but also endow carbon fiber cement-based materials with some functional / intelligent characteristics, which greatly expands the Application range of cement-based materials. [0003] Cement-based materials doped with carbon fibers not only have greatly i...
Claims
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IPC IPC(8): C04B28/02C04B14/38C04B14/06
Inventor 韩宝国张立卿王云洋欧进萍
Owner DALIAN UNIV OF TECH