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Light cement-based porous material and preparation method thereof

A technology for porous materials and cement, applied in the field of lightweight cement-based porous materials and their preparation, can solve problems such as insufficient compressive strength, and achieve the effects of reducing cement consumption, enhancing crack resistance, and improving durability

Inactive Publication Date: 2019-01-04
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the compressive strength of the existing cement-based porous materials cannot meet the requirements, on the one hand, the present invention provides a lightweight cement-based porous material, the lightweight cement-based porous material is calculated in parts by mass. Composed of the following components:

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In order to solve the problem that the compressive strength of existing cement-based porous materials cannot meet the requirements, the present invention provides a lightweight cement-based porous material, which consists of the following components in parts by mass composition:

[0023] 185-280 parts of cement, 20-70 parts of fly ash, 5-14 parts of silica fume, 8.3-16.8 parts of chemical foaming agent, 1-2 parts of water reducing agent, 0.3-0.45 parts of foam stabilizer, 1.85-8.40 parts of fiber parts, water-repellent agent 0.5-2.0 parts, water 102-168 parts.

[0024] Preferably, the cement in the present invention is P.II52.5 Portland cement.

[0025] Preferably, the fly ash in the present invention has a CaO content of less than 10% and a surface area of ​​350-360m 2 / kg of low calcium ash.

[0026] Preferably, the average particle size of the silica fume in the present invention is 0.1um, and the SiO2 content of the silica fume is ≥95.4%.

[0027] Preferably, th...

Embodiment 2

[0034] The present embodiment provides the preparation method of lightweight cement-based porous material in the present invention, and this preparation method comprises:

[0035] Step 1. In parts by mass, 185-280 parts of cement, 20-70 parts of fly ash, 5-14 parts of silica fume, 8.3-16.8 parts of chemical foaming agent, 1-2 parts of water reducing agent, foam stabilizer 0.3-0.45 parts of agent, 1.85-8.40 parts of fiber, 0.5-2.0 parts of water-repellent agent, and 102-168 parts of water are weighed, and the temperature of water is 30-350°C;

[0036] Step 2. After mixing and stirring the cement, fly ash, silica fume, water reducer, foam stabilizer, fiber and water repellent weighed in step 1, add the water weighed in step 1 and stir evenly , get slurry;

[0037] Step 3. Add the chemical foaming agent weighed in step 1 to the slurry obtained in step 2, stir evenly, pour into the mold, and form a test block with a height of 35-40mm after static foaming. The test block After so...

Embodiment 3

[0039] This embodiment provides a lightweight cement-based porous material, which consists of the following components in parts by mass:

[0040] 185 parts of cement, 20 parts of fly ash, 5 parts of silica fume, 8.3 parts of chemical foaming agent, 1 part of water reducing agent, 0.3 parts of foam stabilizer, 1.85 parts of fiber, 0.5 parts of water-repellent agent, and 102 parts of water.

[0041] making process:

[0042] Step 1. In terms of parts by mass, 185 parts of cement, 20 parts of fly ash, 5 parts of silica fume, 8.3 parts of chemical foaming agent, 1 part of water reducing agent, 0.3 parts of foam stabilizer, 1.85 parts of fiber, water repellent 0.5 parts of agent and 102 parts of water are weighed, and the temperature of water is 30°C;

[0043] Step 2. After mixing and stirring the cement, fly ash, silica fume, water reducer, foam stabilizer, fiber and water repellent weighed in step 1, add the water weighed in step 1 and stir evenly , get slurry;

[0044] Step 3....

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Abstract

The invention relates to a light cement-based porous material and a preparation method thereof, and belongs to the technical field of building materials. The light cement-based porous material comprises, by weight, 185-280 parts of cement, 20-70 parts of coal ash, 5-14 parts of silica fume, 8.3-16.8 parts of chemical foaming agents, 1-2 parts of water reducing agents, 0.3-0.45 part of foam stabilizers, 1.85-8.40 parts of fibers, 0.5-2.0 parts of water repellents and 102-168 parts of water. The compressive strength of the light cement-based porous material formed by matching is higher than or equal to 0.40MPa, the tensile strength of the light cement-based porous material is higher than or equal to 0.13MPa, by adding the coal ash and the silica fume, cement content can be decreased, cracksgenerated by stress of the light cement-based porous material can be eliminated, the later strength of the light cement-based porous material can be improved, the fibers are added into slurry to enhance the crack resistance of the light cement-based porous material, pores and filling capillary channels in the light cement-based porous material can be decreased by the water repellents, the water absorptivity or the water permeability of the light cement-based porous material under hydrostatic pressure are reduced, permeability resistance is improved, and durability is enhanced.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a lightweight cement-based porous material and a preparation method thereof. Background technique [0002] Thermal insulation materials refer to materials that can prevent heat loss inside a building or isolate external heat from entering. In the field of construction, thermal insulation materials are mainly responsible for the ability of the enclosure structure to maintain an appropriate indoor temperature in winter; thermal insulation materials are mainly responsible for the ability of the enclosure structure to isolate the impact of heat radiation and outdoor high temperature in summer, so as to keep the indoor temperature at an appropriate temperature. [0003] There are many types of thermal insulation materials, and there are many different classification methods. According to the material of thermal insulation materials, they can be divided into organic thermal ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B38/02C04B111/40
CPCC04B28/04C04B2111/40C04B2201/50C04B18/08C04B18/146C04B22/068C04B2103/302C04B24/20C04B22/085C04B16/0633C04B22/124C04B22/06C04B38/02
Inventor 佘伟张云升杨永敢郭盼盼
Owner SOUTHEAST UNIV
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