A composite material for toughening concrete

A composite material and concrete technology, applied in the field of toughened composite material preparation, can solve the problems of affecting the service life and safety of buildings, prone to cracks, low flexural strength, etc. processing effect

Active Publication Date: 2017-10-17
云南泺决建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary concrete has low flexural strength and high brittleness, so it is easy to crack or even break in an environment with complex stress, which seriously affects the service life and safety of these buildings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]First prepare modified silica nanotubes:

[0035] (1) Put 30 stainless steel balls with a diameter of 10 mm and 45 stainless steel balls with a diameter of 5 mm in two identical 5 L nylon tanks, then add 0.9 kg of silica nanotubes respectively, and then drop Add 90 ml absolute ethanol and seal with a nylon cap. Put two ball mill jars symmetrically into the ball mill, and ball mill them for 48 h under the condition that the rotation speed is 400 rpm and the rotation direction is automatically switched every 30 minutes;

[0036] (2) Add the silica nanotubes treated in step (1) into an aqueous solution of Tween 20 with a pH of 8 and a concentration of 20 wt%, sonicate for 18 h, filter, wash with water, and vacuum at 55°C Dry for 15 hours;

[0037] (3) Take the silica nanotubes treated in step (3) and stir in 40 L of 35wt% sodium hydroxide aqueous solution for 48 hours, filter, wash the powder with pure water, and vacuum at 60°C Dry for 18 hours;

[0038] (4) Take the si...

Embodiment 2

[0048] First prepare modified silica nanotubes:

[0049] (1) Put 30 stainless steel balls with a diameter of 10 mm and 45 stainless steel balls with a diameter of 5 mm in two identical 5 L nylon tanks, then add 0.9 kg of silica nanotubes respectively, and then drop Add 90 ml of absolute ethanol and seal it with a nylon cover; put two ball mill jars into the ball mill symmetrically, and ball mill for 48 h under the condition that the rotation speed is 400 rpm and the rotation direction is automatically changed every 30 minutes;

[0050] (2) Add the silica nanotubes treated in step (1) into an aqueous solution of Tween 20 with a pH of 8 and a concentration of 20 wt%, sonicate for 18 h, filter, wash with water, and vacuum at 57°C Dry for 15 hours;

[0051] (3) Take the silica nanotubes treated in step (2) and stir in 40 L of 35wt% sodium hydroxide aqueous solution for 48 hours, filter, wash the powder with pure water, and vacuum at 59°C Dry for 18 hours;

[0052] (4) Take the ...

Embodiment 3

[0062] First prepare modified silica nanotubes:

[0063] (1) Put 30 stainless steel balls with a diameter of 10 mm and 45 stainless steel balls with a diameter of 5 mm in two identical 5 L nylon tanks, then add 0.9 kg of silica nanotubes respectively, and then drop Add 90 ml of absolute ethanol and seal it with a nylon cover; put two ball mill jars into the ball mill symmetrically, and ball mill for 48 h under the condition that the rotation speed is 400 rpm and the rotation direction is automatically changed every 30 minutes;

[0064] (2) Add the silica nanotubes treated in step (1) into an aqueous solution of Tween 20 with a pH of 8 and a concentration of 20 wt%, sonicate for 18 h, filter, wash with water, and vacuum at 56°C Dry for 15 hours;

[0065] (3) Take the silica nanotubes treated in step (2) and stir in 40 L of 35 wt% sodium hydroxide aqueous solution for 48 hours, filter, wash the powder with pure water, and vacuum at 60°C Dry for 18 hours;

[0066] (4) Take the...

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Abstract

The invention belongs to the field of preparation of toughening composite materials, and concretely relates to a composite material for toughening concrete. The composite material comprises, by weight, 1.2-1.8 parts of modified silica nanotubes, 22-28 parts of styrene-butadiene-styrene block copolymer, 46-50 parts of activated wood powder fibers, 3.5-5 parts of a silane coupling agent, 3.0-3.5 parts of a solubilizer, 4-6 parts of a filler and 180-220 parts of water. The composite material is fully dispersed in concrete to make the concrete have good toughness, isotropy and fatigue resistance, so the composite material is a high-performance concrete toughening material.

Description

technical field [0001] The invention belongs to the field of preparation of toughened composite materials, in particular to a composite material used for toughening concrete. Background technique [0002] The stress environment of high-speed rail viaducts, bridge decks of long-span bridges, and various types of tunnel arch walls is complex and harsh. Ordinary concrete has low flexural strength and high brittleness, so it is prone to cracks or even fractures in environments with complex stresses, which seriously affects the service life and safety of these buildings. In order to improve the toughness of concrete, it is urgent to develop new composite materials with toughening performance. [0003] The composite material for concrete toughening of the present invention adopts modified silica nanotubes, styrene-butadiene-styrene block copolymers and wood flour fibers with excellent toughening performance, through solubilizer and silane coupling agent The surface modification ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L53/02C08L97/02C08L51/00C08K13/06C08K9/04C08K7/26C08K5/5425C08K3/34C04B18/02
CPCC04B18/022C08L53/02C08L2205/03C08L97/02C08L51/003C08K13/06C08K9/04C08K7/26C08K5/5425C08K3/34
Inventor 肖三霞蒋国平
Owner 云南泺决建材有限公司
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