Anti-cracking and anti-seepage concrete and preparation process thereof

Abstract

The invention discloses anti-cracking and anti-seepage concrete and a preparation process thereof, and relates to the technical field of concrete. The concrete is prepared from the following components in parts by weight: 45-50 parts of cement; 30 to 35 parts of aggregate; 4-6 parts of an expanding agent; 0.5 to 5 parts of an anti-cracking agent; 2-3 parts of a waterproof agent; 0.5-1 part of a water reducing agent; 10 to 15 parts of an admixture; 5-10 parts of modified cellulose hollow fiber; 2-5 parts of diatomite; 0.5 to 2 parts of nano silicon dioxide; 20 to 30 parts of water; and the aggregate is limestone macadam, and the particle size is 7-30 mm. Through a series of improvements, the crack resistance of the concrete is remarkably improved, a compact waterproof layer can be formed in the concrete, and the impermeability is improved; the concrete has good workability and working performance, construction operation is facilitated, and meanwhile the concrete has more excellent durability.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete, and in particular relates to anti-cracking and anti-seepage concrete and a preparation process thereof. Background Art

[0002] Concrete is one of the most important civil engineering materials in contemporary times. It is an artificial stone made of cementitious materials, coarse and fine aggregates, water, admixtures and admixtures in a certain proportion, and is evenly mixed, compacted, and hardened. However, ordinary concrete is prone to cracking and leakage during use, which seriously affects its use effect and life. In order to solve these problems, anti-crack and anti-seepage concrete came into being.

[0003] Anti-crack and anti-seepage concrete is a kind of concrete with excellent crack resistance and anti-seepage properties. It achieves the effect of anti-crack and anti-seepage by adding specific admixtures and additives into the concrete to improve the internal structure of the concrete, improve the density and anti-seepage of the concrete.

[0004] At present, anti-crack and anti-seepage concrete is widely used in various projects that require anti-crack and anti-seepage, such as basements, tunnels, pools, dams, etc. These projects have high requirements on the anti-crack and anti-seepage properties of concrete. The use of anti-crack and anti-seepage concrete can effectively improve the quality and safety of the project.

[0005] However, the durability of existing anti-cracking and anti-seepage concrete is not ideal, and it is not very convenient for construction operation, and there is still room for improvement in crack resistance and anti-seepage performance. Summary of the invention

[0006] The purpose of the present invention is to provide a crack-proof and impermeable concrete and a preparation process thereof to solve the existing problems: the durability of the existing crack-proof and impermeable concrete is not ideal, and it is not very convenient for construction operation, and there is still room for improvement in crack resistance and impermeability.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The invention discloses an anti-cracking and anti-seepage concrete, which comprises the following components in parts by weight: 45-50 parts of cement; 30-35 parts of aggregate; 4-6 parts of expansion agent; 0.5-5 parts of anti-cracking agent; 2-3 parts of waterproofing agent; 0.5-1 parts of water reducing agent; 10-15 parts of admixture; 5-10 parts of modified cellulose hollow fiber; 2-5 parts of diatomaceous earth; 0.5-2 parts of nano silicon dioxide; and 20-30 parts of water.

[0009] Furthermore, the aggregate is limestone crushed stone with a particle size of 7-30 mm.

[0010] Furthermore, the waterproofing agent comprises the following components in parts by weight: 20-30 parts of silicate cement; 10-20 parts of quartz sand; and 5-15 parts of organic silicon compound.

[0011] Furthermore, the water reducing agent is polyacrylamide particles.

[0012] Furthermore, the admixture comprises the following components in parts by weight: 47 parts of slag powder; 42 parts of fly ash; and 10 parts of steel fiber.

[0013] A preparation process of crack-proof and impermeable concrete, used for the above-mentioned crack-proof and impermeable concrete, comprises the following steps:

[0014] Step 1: Prepare each component according to weight;

[0015] Step 2: Put cement, aggregate, admixture, diatomaceous earth, modified cellulose hollow fiber and nano-silica into a concrete mixer, add water and water reducing agent, and stir;

[0016] Step 3: During the mixing process, gradually add the expansion agent and anti-cracking agent to ensure uniform distribution;

[0017] Step 4: Add the waterproofing agent into the concrete and continue stirring until it is uniform to obtain the anti-cracking and anti-seepage concrete.

[0018] The present invention has the following beneficial effects:

[0019] The present invention significantly improves the crack resistance of concrete through a series of improvements, and can form a dense waterproof layer in the concrete to improve the anti-seepage performance. It also has good workability and working performance, is convenient for construction operation, and makes the concrete more durable. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1:

[0022] The present invention is a crack-proof and impermeable concrete, which is made of the following components by weight: 45-50 parts of cement; 30-35 parts of aggregate, wherein the aggregate is specifically limestone crushed stone with a particle size range of 7-30 mm, and here, the particle size is specifically 17 mm; thereby ensuring that the concrete has good mechanical properties and crack resistance, and the limestone crushed stone is preferably produced locally during construction; 4-6 parts of expansion agent, which effectively compensates for concrete shrinkage and reduces the risk of cracking; 0.5-5 parts of anti-cracking agent, which can effectively improve the crack resistance of concrete; 2-3 parts of waterproofing agent, which forms a waterproof layer in the concrete and improves the anti-seepage performance; water-reducing agent 0.5-1 parts of water reducing agent, wherein the water reducing agent is specifically polyacrylamide particles, which forms a dense waterproof layer, helps to reduce water consumption and improve the fluidity of concrete; 10-15 parts of admixture; 5-10 parts of modified cellulose hollow fiber, which is prepared by cross-linking and modification of carboxymethyl cellulose and chitosan composite materials, and can greatly enhance the crack resistance and anti-seepage performance of concrete in combination with other components; 2-5 parts of diatomaceous earth, which utilizes the excellent adsorption performance and pore structure of diatomaceous earth to effectively enhance the durability of concrete; 0.5-2 parts of nano silicon dioxide, which further enhances the density and anti-seepage performance of concrete; 20-30 parts of water.

[0023] In this embodiment, the waterproofing agent includes the following components in parts by weight: 20-30 parts of silicate cement; 10-20 parts of quartz sand; 5-15 parts of organosilicon compound. During the pouring process, the waterproofing agent will penetrate into the pores of the concrete and react chemically with the concrete, thereby forming a dense waterproof layer in the concrete, greatly improving the anti-seepage performance.

[0024] The admixture comprises the following components in parts by weight: 47 parts of slag powder; 42 parts of fly ash; and 10 parts of steel fiber, so that the admixture has good compatibility with other components in concrete and can further improve the crack resistance of concrete.

[0025] This significantly improves the crack resistance and impermeability of concrete, while making the concrete have excellent durability, good workability and performance, and is easy to construct. This makes anti-crack and impermeability concrete suitable for various engineering scenarios that require high crack resistance and impermeability, such as basements, tunnels, bridges, etc.

[0026] Embodiment 2:

[0027] Based on the above embodiment 1, a preparation process of anti-cracking and anti-seepage concrete is disclosed, which specifically includes the following steps:

[0028] Step 1: Prepare each component according to weight. The raw materials of each component should be clean, free of impurities and meet relevant standards;

[0029] When preparing waterproofing agents, it is necessary to strictly control the quality and ratio of raw materials to ensure the stable and reliable performance of the waterproofing agent. Portland cement, quartz sand and organosilicon compounds are mixed evenly in a suitable proportion, and an appropriate amount of water is added and stirred until a uniform slurry is formed. The slurry is then poured into a mold, and after curing and drying, the finished waterproofing agent can be obtained.

[0030] Step 2: Put cement, aggregate, admixture, diatomaceous earth, modified cellulose hollow fiber and nano-silica into a concrete mixer, then add water and water reducer and stir. Pay attention to controlling the stirring time and stirring speed to ensure that all components are evenly distributed to avoid local concentrations that are too high or too low;

[0031] Step 3: During the mixing process, gradually add the expansion agent and anti-cracking agent to ensure that the waterproofing agent can be fully dispersed in the concrete;

[0032] Step 4: Add the waterproofing agent to the concrete and continue stirring until it is uniform to obtain the crack-proof and impermeable concrete. When applying the waterproofing agent, the amount should not be too much or too little. Too much may cause the performance of the concrete to deteriorate. It can be adjusted according to the concrete's impermeability requirements and construction requirements to ensure the best waterproof effect.

[0033] In this way, crack-resistant and anti-seepage concrete suitable for various engineering scenarios requiring higher crack resistance and anti-seepage performance can be prepared.

[0034] Finally, the prepared concrete is transported to the construction site and poured according to the construction requirements. During the pouring process, the pouring speed and vibration method are strictly controlled to avoid bubbles and voids. After pouring, the formwork-covered curing method is adopted, and the humidity and temperature of the concrete are regularly tested during the curing process to ensure that the concrete maintains appropriate humidity and temperature conditions during the hardening process.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A crack-proof and impermeable concrete, characterized in that: The invention comprises the following components by weight: 45-50 parts of cement; 30-35 parts of aggregate; 4-6 parts of expansion agent; 0.5-5 parts of anti-cracking agent; 2-3 parts of waterproofing agent; 0.5-1 parts of water reducing agent; 10-15 parts of admixture; 5-10 parts of modified cellulose hollow fiber; 2-5 parts of diatomaceous earth; 0.5-2 parts of nano silicon dioxide; 20-30 parts of water.

2. The anti-cracking and anti-seepage concrete according to claim 1, characterized in that: The aggregate is limestone crushed stone with a particle size of 7-30 mm.

3. The anti-cracking and anti-seepage concrete according to claim 1, characterized in that: The waterproofing agent comprises the following components in parts by weight: 20-30 parts of silicate cement; 10-20 parts of quartz sand; and 5-15 parts of organic silicon compound.

4. The anti-cracking and anti-seepage concrete according to claim 1, characterized in that: The water reducing agent is polyacrylamide particles.

5. The anti-cracking and anti-seepage concrete according to claim 1, characterized in that: The admixture comprises the following components in parts by weight: 47 parts of slag powder; 42 parts of fly ash; and 10 parts of steel fiber.

6. A process for preparing crack-proof and impermeable concrete, used for the crack-proof and impermeable concrete according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Prepare each component according to weight; Step 2: Put cement, aggregate, admixture, diatomaceous earth, modified cellulose hollow fiber and nano-silica into a concrete mixer, add water and water reducing agent, and stir; Step 3: During the mixing process, gradually add the expansion agent and anti-cracking agent to ensure uniform distribution; Step 4: Add the waterproofing agent into the concrete and continue stirring until it is uniform to obtain the anti-cracking and anti-seepage concrete.