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Preparation method for fiber reinforced concrete with uniformly-dispersed basalt fibers

A fiber-reinforced concrete and basalt fiber technology, which is applied in the field of building materials, can solve problems such as basalt fiber is not easy to disperse, and achieve the effect of simple operation

Active Publication Date: 2019-10-25
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is: Aiming at the problem that basalt fibers are not easy to disperse in concrete, a method for preparing fiber concrete that disperses basalt fibers evenly is invented

Method used

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  • Preparation method for fiber reinforced concrete with uniformly-dispersed basalt fibers
  • Preparation method for fiber reinforced concrete with uniformly-dispersed basalt fibers

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0036] (1) Fiber dispersant concentration:

[0037] ①Concentration of fiber dispersant A: the concentration of 4-amino-1,2-catechol hydrochloride is 1g / L, and the concentration of trishydroxymethylaminomethane is 12g / L

[0038] ②Concentration of fiber dispersant B: the concentration of sodium chloroacetate is 12g / L, the concentration of sodium bicarbonate is 4g / L, and the concentration of dimethylformamide is 20g / L

[0039] (2) Basalt fiber length 12mm, dosage: 5.6kg

[0040] (3) The preparation process of fiber concrete to make basalt fiber evenly dispersed is as follows

[0041] ①Mix the dispersant A and the metered basalt fiber together for 3 minutes according to the mass ratio of 3:1; add water to clean the fiber after drying the solution, and then dry the water;

[0042] ②Mix the dispersant B and the basalt fiber obtained in step (1) according to the mass ratio of 4:1 and stir for 2 minutes, drain the solution, add water to clean the fiber, then drain the water, and tak...

example 2

[0049] (1) Fiber dispersant concentration:

[0050] ①Concentration of fiber dispersant 1: 4-amino-1,2-catechol hydrochloride concentration is 3g / L, trishydroxymethylaminomethane concentration is 10g / L

[0051] ②Concentration of fiber dispersant 2: the concentration of sodium chloroacetate is 13g / L, the concentration of sodium bicarbonate is 3g / L, and the concentration of dimethylformamide is 15g / L

[0052] (2) Basalt fiber length 12mm, dosage: 8.4kg

[0053] (3) The preparation process of fiber concrete with evenly dispersed basalt fibers is as follows

[0054] ①Mix the dispersant 1 and the metered basalt fiber together for 3 minutes according to the mass ratio of 5:1; after drying the solution, add water 4 times the weight of the fiber to clean the fiber, and then dry the water;

[0055] ②Mix the dispersant 2 and the basalt fiber obtained in step (1) according to the mass ratio of 2:1 and mix and stir for 2 minutes, drain the solution, add water to clean the fiber, then dra...

example 3

[0062] (1) Fiber dispersant concentration:

[0063] ①Concentration of fiber dispersant 1: 4-amino-1,2-catechol hydrochloride concentration is 2g / L, trishydroxymethylaminomethane concentration is 11g / L

[0064] ②Concentration of fiber dispersant 2: the concentration of sodium chloroacetate is 15g / L, the concentration of sodium bicarbonate is 5g / L, and the concentration of dimethylformamide is 17g / L

[0065] (2) Basalt fiber length 12mm, dosage: 11.2kg

[0066] (3) The preparation process of fiber concrete with evenly dispersed basalt fibers is as follows

[0067] ①Mix the dispersant 1 and the measured basalt fiber according to the mass ratio of 4:1 and stir for 3 minutes; add water to clean the fiber after drying the solution, and then dry the water;

[0068] ②Mix the dispersant 2 and the basalt fiber obtained in step (1) according to the mass ratio of 3:1 and stir for 2 minutes. After drying the solution, add water 5 times the weight of the fiber to clean the fiber, then dry t...

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Abstract

The invention relates to a preparation method for fiber reinforced concrete with uniformly-dispersed basalt fibers. According to the invention, a fiber dispersant is divided into two types, wherein afiber dispersant A is composed of a 4-amino-1,2-catechol hydrochloride solution with a concentration of 1 to 3 g / L and a trishydroxymethylamino methane solution with a concentration of 10 to 12 g / L; and a fiber dispersant B is composed of a sodium chloroacetate solution with a concentration of 12 to 15 g / L, a sodium hydrogen carbonate solution with a concentration of 3 to 5 g / L and a dimethylformamide solution with a concentration of 15 to 20 g / L. The preparation method for the fiber reinforced concrete with uniformly-dispersed basalt fibers comprises the following steps: placing the basalt fibers into the dispersant A, carrying out stirring for 3 to 5 minutes, then placing an obtained mixture into the dispersant B, and carrying out stirring for 1 to 3 minutes so as to obtain treated basalt fibers; and mixing a weighed cementitious material with the treated basalt fibers under stirring for 1 to 3 minutes, then adding sand stones, clear water and a polycarboxylate water-reducing agent,placing an obtained mixture on a horizontal vibration table, and carrying out vibration under stirring for 2 to 5 minutes so as to obtain the fiber reinforced concrete with uniformly-dispersed basaltfibers. The method provided by the invention effectively solves the defect of difficulty in uniform dispersion of fibers in concrete.

Description

technical field [0001] The invention relates to a preparation method of fiber concrete for uniformly dispersing basalt fibers, belongs to the technical field of building materials, and can effectively solve the problem of uneven fiber dispersion in fiber concrete. Background technique [0002] Ordinary concrete has shortcomings such as low tensile / flexural strength and poor impact resistance, which limit the application range of concrete. Adding fiber to concrete is the main method to solve the above problems. Compared with ordinary concrete, the tensile and flexural strength of fiber concrete can be increased by more than 10%, the impact energy value can reach 5 times that of ordinary concrete, and the mechanical properties are significantly improved. [0003] Although the mechanical properties of fiber-reinforced concrete have been significantly improved, the main problem in the preparation process of fiber-reinforced concrete is that the fibers are not uniformly disperse...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/146C04B18/08C04B18/141C04B14/06C04B14/02C04B20/0076C04B2103/302C04B14/46C04B24/12C04B24/122C04B24/005C04B22/10C04B24/124
Inventor 李悦李洪文金彩云
Owner BEIJING UNIV OF TECH
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