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A kind of surface activated polypropylene fiber configuration composite concrete and its preparation method

A polypropylene fiber, surface activation technology, applied in the direction of fiber chemical characteristics, single-component polyolefin rayon, rayon manufacturing, etc., can solve unpredictable problems, achieve structural stability, high ultimate elongation, increase The effect of dilation

Active Publication Date: 2019-01-08
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the occurrence and change of concrete cracks cannot be easily detected by the naked eye, and they are also unpredictable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: A kind of surface-activated polypropylene fiber configuration composite concrete and its preparation method, the composite concrete includes the following components by weight: 4 parts of polypropylene nanofibers, 1 part of nano film-forming accelerator, and 2 parts of carbon nanotubes , 0.5 parts of UEA concrete expansion agent, 0.1 parts of antioxidant, 1 part of toughening agent, 7 parts of new resin EPMC, 78 parts of cement, 65 parts of sand, 52 parts of coarse aggregate, 145 parts of fine aggregate, and 10 parts of lime.

[0017] Wherein, the preparation method of the polypropylene fiber is as follows: (1) dissolving polypropylene having a molecular weight of not more than 400,000 to a mass concentration of 2% nano-activator and dimethylformamide mixed in a mass ratio of 1:3 In the solution, the electromagnetic stirring is heated for 2 days, and the temperature is controlled between 130°C, and then a cationic surfactant is added to increase the charge ...

Embodiment 2

[0023]Embodiment 2: A kind of surface-activated polypropylene fiber configuration composite concrete and its preparation method, the composite concrete includes the following components by weight: 5 parts of polypropylene nanofibers, 1.5 parts of nano film-forming accelerators, and 2.5 parts of carbon nanotubes , UEA concrete expansion agent 0.75 parts, antioxidant 0.3 parts, toughening agent 1.5 parts, new resin EPMC 9 parts, cement 88.5 parts, sand 80 parts, coarse aggregate 65.5 parts, fine aggregate 154.5 parts, lime 12 parts.

[0024] Wherein, the preparation method of the polypropylene fiber is as follows: (1) dissolving polypropylene having a molecular weight of not more than 400,000 to a mass concentration of 2% nano-activator and dimethylformamide mixed in a mass ratio of 1:3 In the solution, the electromagnetic stirring is heated for 2.5 days, and the temperature is controlled between 150°C, and then a cationic surfactant is added to increase the charge concentration ...

Embodiment 3

[0030] Embodiment 3: A kind of surface-activated polypropylene fiber configuration composite concrete and its preparation method, the composite concrete includes the following components by weight: 6 parts of polypropylene nanofibers, 2 parts of nano film-forming accelerators, and 3 parts of carbon nanotubes , 1 part of UEA concrete expansion agent, 0.5 parts of antioxidant, 2 parts of toughening agent, 11 parts of new resin EPMC, 99 parts of cement, 95 parts of sand, 79 parts of coarse aggregate, 164 parts of fine aggregate, and 14 parts of lime.

[0031] Wherein, the preparation method of the polypropylene fiber is as follows: (1) dissolving polypropylene having a molecular weight of not more than 400,000 to a mass concentration of 2% nano-activator and dimethylformamide mixed in a mass ratio of 1:3 In the solution, the electromagnetic stirring is heated for 3 days, and the temperature is controlled between 170 ° C. Then, a cationic surfactant is added to increase the charge ...

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Abstract

The invention discloses a surface-activated polypropylene fiber-configured composite concrete and a preparation method thereof. The composite concrete comprises the following components: polypropylene nanofibers, nanofilm-forming accelerators, carbon nanotubes, UEA concrete expansion agents, and antioxidants , toughening agent, new resin EPMC, cement, sand, coarse aggregate, fine aggregate, and lime are compounded. Among them, polypropylene nanofibers are prepared by electrospinning after activating polypropylene with nano-activators. , combined with other components and ordinary concrete, the prepared composite concrete has strong cohesion, high fission resistance, high temperature resistance, frost resistance, wear resistance, corrosion resistance, and its high tensile and flexural strength, which can be widely used in Various fields.

Description

technical field [0001] The invention relates to the field of new building materials, in particular to a surface-activated polypropylene fiber-configured composite concrete and a preparation method thereof. Background technique [0002] Concrete is the most widely used building material in modern times, and it is also the man-made material with the largest output currently. It has the advantages of abundant raw materials, low price, simple manufacturing process, convenient shape, good fire resistance, relatively stable durability, and low maintenance cost, and occupies a very important position in civil and building materials. At present, the main concrete is pebble concrete, but pebble concrete has the disadvantages of poor deformation resistance, poor wear resistance, poor impermeability, and poor high temperature resistance, which limits the application range and effect of pebble concrete. Moreover, the pebble concrete is impacted by the external environment, causing crac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/12D01F6/46D01F1/10
CPCC04B28/12D01F1/10D01F1/103D01F6/46C04B14/02C04B14/06C04B7/00C04B16/0625C04B14/022C04B24/24C04B24/06C04B24/045C04B24/40C04B24/128C04B24/2623C04B24/121C04B24/26
Inventor 李树山李红梅贾明晓刘祖军解伟陈爱玖
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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