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Preparation method of high-toughness cement-based composite material

A composite material, cement-based technology, applied in cement mixing devices, clay preparation devices, chemical instruments and methods, etc., can solve the problems of insufficient strength, poor toughness, and short setting time.

Pending Publication Date: 2021-07-06
CHONGQING JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing a high-toughness cement-based composite material in view of the defects that the current cement has insufficient strength, poor toughness, and short setting time

Method used

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  • Preparation method of high-toughness cement-based composite material
  • Preparation method of high-toughness cement-based composite material

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Embodiment 1

[0023] This embodiment provides a method for preparing a high-toughness cement-based composite material, in terms of mass fraction: 1000Kg of ordinary Portland cement, 100kg of fiber, 3000kg of sand, and 600kg of water;

[0024] This program provides the preparation method of the above-mentioned high-toughness cement-based composite material, including the following steps:

[0025] Step 1: Weigh the plant fibers according to the components of the cement, soak them in 5% sodium hydroxide solution for 12 hours and take them out for later use;

[0026] Step 2: Stir the plant fibers treated in Step 1 with cement and sand for 2 minutes;

[0027] Step 3: Stir the mixture evenly in Step 2, add water with a water consumption of 2 / 3, and continue stirring for 2 to 3 minutes;

[0028] Step 4: Add the water reducer to the mixture obtained in Step 3 and stir with 1 / 3 of the water

[0029] Step 5: Then pour it into the mold of the mortar test block, wait for no less than 24 hours to remo...

Embodiment 2

[0031] This embodiment provides a preparation method of a high-toughness cement-based composite material, in terms of mass fraction: 1000Kg of ordinary Portland cement, 150kg of fiber, 2800kg of sand, and 550kg of water;

[0032] This program provides the preparation method of the above-mentioned high-toughness cement-based composite material, including the following steps:

[0033] Step 1: Weigh the plant fibers according to the components of the cement, soak them in 5% sodium hydroxide solution for 12 hours and take them out for later use;

[0034] Step 2: Stir the plant fibers treated in Step 1 with cement and sand for 2 minutes;

[0035] Step 3: Stir the mixture evenly in Step 2, add water with a water consumption of 2 / 3, and continue stirring for 2 to 3 minutes;

[0036] Step 4: Add the water reducer to the mixture obtained in Step 3 and stir with 1 / 3 of the water

[0037] Step 5: Then pour it into the mold of the mortar test block, wait for no less than 24 hours to rem...

Embodiment 3

[0039] This embodiment provides a preparation method of a high-toughness cement-based composite material, in terms of mass fraction: 1000Kg of ordinary Portland cement, 200kg of fiber, 2900kg of sand, and 500kg of water;

[0040] This program provides the preparation method of the above-mentioned high-toughness cement-based composite material, including the following steps:

[0041] Step 1: Weigh the plant fibers according to the components of the cement, soak them in 5% sodium hydroxide solution for 12 hours and take them out for later use;

[0042] Step 2: Stir the plant fibers treated in Step 1 with cement and sand for 2 minutes;

[0043] Step 3: Stir the mixture evenly in Step 2, add water with a water consumption of 2 / 3, and continue stirring for 2 to 3 minutes;

[0044] Step 4: Add the water reducer to the mixture obtained in Step 3 and stir with 1 / 3 of the water

[0045] Step 5: Then pour it into the mold of the mortar test block, wait for no less than 24 hours to rem...

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Abstract

The invention discloses a preparation method of a high-toughness cement-based material, which comprises the following steps of: pretreating straw plant fibers, and doping a cement base with the pretreated straw plant fibers. The modified cement-based material is obtained by mixing straw plant fibers, cement, sand, a polycarboxylic acid water reducing agent and water, wherein relative to 1000 kg of cement, the use amount of the plant fibers is 0-200 kg, the use amount of the sand is 2700-3200 kg, and the use amount of the water is 500-800 kg. According to the invention, the plant fibers are modified, and the composite material of the plant fibers treated by a sodium hydroxide solution has good compressive strength and breaking strength, and also has good plasticity, toughness, crack resistance and tensile resistance. The fiber-reinforced cement-based material is prepared by taking agricultural waste straw plants as a main raw material, and the method is beneficial to reducing the manufacturing cost, saving resources and solving the pollution of waste to the environment, so that the environment is protected.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for preparing a high-toughness cement composite material. Background technique [0002] Cement-based is one of the inseparable building materials for human production and life. It has the advantages of abundant raw materials, low cost, convenient construction, good durability, and easy maintenance. It is widely used in civil engineering, water conservancy, national defense and other projects. , has become the most widely used and used building material by human beings. The quality of its performance directly determines the quality of the project. Therefore, the demand for high-toughness cement has become the focus of attention in the industry at this stage. [0003] It is still widely used in construction fields of buildings, roads, bridges and harbor facilities. The reason why concrete lasts for a long time is mainly due to its many advantages such as wide ...

Claims

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Application Information

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IPC IPC(8): C04B28/04B28B1/52B28C5/40C04B111/34
CPCB28B1/525B28C5/402C04B28/04C04B2111/343C04B2201/50C04B14/06C04B18/24C04B2103/302
Inventor 汪灵莉邢青松张卓翔傅举鹏
Owner CHONGQING JIAOTONG UNIVERSITY
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