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A kind of self-waterproof concrete and preparation method thereof

A self-waterproof concrete and mixture technology, applied in the field of building materials, can solve the problems of high requirements for concrete waterproofing and inability to meet waterproof concrete, and achieve the effects of improving compactness, improving durability and safety, and improving strength and hardness

Inactive Publication Date: 2021-05-04
海南省三联建筑材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the concrete of the basement exterior wall has a large specific surface area, and the bottom of the exterior wall has strong constraints, etc., the waterproof requirements for concrete are higher, which cannot meet the requirements of waterproof concrete for underground projects.

Method used

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  • A kind of self-waterproof concrete and preparation method thereof
  • A kind of self-waterproof concrete and preparation method thereof
  • A kind of self-waterproof concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1, the preparation of modified wood ceramics

[0035] A. Dry the wood powder to a moisture content of <25%, crush and grind it and pass it through an 80-mesh fine sieve to obtain fine wood powder;

[0036] B takes by weight parts and is 40 parts of liquid epoxy acrylic resins with a solid content of 35 to 45%, 20 parts of liquid silica sol with a solid content of 40 to 50%, and 65 parts of sodium lignosulfonate and stirs to obtain a mixed solution ;

[0037] C. Mix the fine wood powder obtained in step A with the mixed solution obtained in step B evenly in a weight ratio of 1:1.2, impregnate at normal temperature and pressure for 65 hours, dry, put in an inert gas-protected heating furnace for preheating, and gradually increase the temperature to 600°C, depressurize and extract the low molecular components, then continue to heat up to 1500°C, vacuum carbonize for 4 hours, and cool to obtain the product.

Embodiment 2

[0038] Embodiment 2, a kind of self-waterproof concrete

[0039] The self-waterproof concrete consists of the following components and parts by weight thereof:

[0040] 80 parts of Portland cement, 55 parts of gravel, 35 parts of sand powder, 10 parts of modified wood ceramics, 4 parts of 2-acrylamido-2-methylpropanesulfonic acid, sodium lignosulfonate with a molecular weight of 10,000-50,000 5 parts and 28 parts of water; the particle size of the gravel is 10-20mm, the mud content is less than 0.5%, and the needle-like particles are less than 10%; the fineness modulus of the sand is 2.6-3.0, and the mud content Less than 2%; the modified wood ceramics is the modified wood ceramics prepared in Example 1.

[0041] Preparation:

[0042] S1 Pour crushed stone, Portland cement, and sand into the hopper in sequence, and stir for 40-60 seconds to obtain mixture I;

[0043] S2 Stir 2-acrylamido-2-methylpropanesulfonic acid, modified wood ceramics, and sodium lignosulfonate evenly ...

Embodiment 3

[0045] Embodiment 3, a kind of self-waterproof concrete

[0046] The self-waterproof concrete consists of the following components and parts by weight thereof:

[0047] 100 parts of Portland cement, 60 parts of gravel, 38 parts of sand, 14 parts of modified wood ceramics, 5 parts of 2-acrylamido-2-methylpropanesulfonic acid, sodium lignosulfonate with a molecular weight of 10,000-50,000 6 parts and 40 parts of water; the particle size of the gravel is 10-20mm, the mud content is less than 0.5%, and the needle-like particles are less than 10%; the fineness modulus of the sand is 2.6-3.0, and the mud content Less than 2%; the modified wood ceramics is the modified wood ceramics prepared in Example 1.

[0048] The preparation method is similar to Example 2.

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Abstract

The invention belongs to the technical field of building materials, and in particular relates to a self-waterproof concrete and a preparation method thereof. The self-waterproof concrete provided by the invention is mainly composed of Portland cement, gravel, sand, modified wood ceramics, 2-acrylamide-2-methylpropanesulfonic acid, sodium lignosulfonate and water. The self-waterproof concrete prepared by the invention has the characteristics of high strength and high hardness, can greatly improve the compressive and crack resistance of concrete, and can solve the problem of the concrete hardening process of the external wall of the basement due to the large surface area and fast surface moisture distribution. Cracking is caused by factors such as uneven stress on the middle, lower and upper parts and the temperature difference between the interior and exterior of the concrete; at the same time, it also has a strong self-waterproof function, which can effectively improve the durability and safety of concrete components.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a self-waterproof concrete and a preparation method thereof. Background technique [0002] The basement of a high-rise building is an important part of construction. The basement generally adopts a reinforced concrete structure. If there is water leakage, it will seriously affect the service life of the high-rise building. Concrete cracks are one of the most common causes of seepage in underground works. Because basement exterior walls are generally thin in thickness, relatively large in height and length, compared with large-volume concrete such as basement floors, basement exterior walls have a larger specific surface area, the moisture on the concrete surface dissipates faster, and it is difficult to maintain the concrete surface, which is easy to cause concrete damage. Wall panels shrink and crack. In addition, the basement floor is generally construc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B111/20C04B111/27C04B111/34
CPCC04B28/04C04B2111/00293C04B2111/20C04B2111/27C04B2111/343C04B2201/50C04B14/02C04B14/06C04B24/16C04B24/18C04B24/281C04B24/42C04B14/062C04B14/022
Inventor 彭材大
Owner 海南省三联建筑材料有限公司
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