What are the classification and functions of concrete waterproofing admixtures?

Overview of concrete waterproofing admixtures

Concrete waterproof admixture is a chemical admixture added to the cement. After the cement is hardened, the volume expands to compensate for the shrinkage and tension of the steel bar, thereby generating prestress and completely filling the cement gap. Cement waterproofing agent can be directly mixed into cement, concrete and mortar. The bottom surface of the product can form an excellent hydrophobic layer. When water splashes on the surface, it rolls off in droplets, acting as lotus leaves. The mixture of water and blowing pre-foaming agent is called pre-foaming liquid. The pre-foaming liquid and compressed air are supplied through the spray gun;

Foaming agent can be used with all kinds of cement and can only be mixed into cement or gravel mortar to produce foamed concrete of various types and uses. Its cost accounts for a small proportion of the total cost of foamed concrete, usually only 1-3%.

There are several features

1. Efficient water reduction and water increase function.

2. High-efficiency impermeability function: used in conjunction with concrete waterproofing agent, it can effectively improve the pore structure of concrete, and at the same time precipitate gel to block the internal capillary channels of concrete. The impermeability performance can be improved by 5-8 times compared to without water repellent. With permanent waterproof effect.

3. Improve the workability of mortar: It can improve the workability of freshly mixed mortar, and the water flow rate is low, which can significantly improve the workability of mortar.

4. Benefit analysis: It has the functions of replacing lime paste, overcoming hollowing, shelling, reducing ash, saving labor and improving efficiency.

5. Retarding effect: delaying the rate of cement hydration and heat release, effectively preventing concrete from cracking.

6. Saving cement: On the premise of maintaining the same strength and slump as the benchmark concrete, it can save 10% of cement.

7. Wide range of applications, used for foam concrete, mortar, paint and other substrates, as well as multi-label cement.

The application of concrete waterproof admixtures in engineering has been paid more and more attention. The addition of waterproof admixtures plays a certain role in improving the performance of concrete, but the selection, addition method and adaptability of concrete waterproof admixtures will seriously affect its development. So what are the classification and functions of concrete admixtures?

Types of concrete admixtures

1. Concrete admixtures are divided into early strength, ordinary, retarded and super retarded admixtures according to their performance.

2. Concrete admixtures are divided into raw materials: lignin, naphthalene, aliphatic, and polycarboxylic acid. At present, polycarboxylic acid accounts for more than 50% in the market.

3. Concrete admixtures are distinguished from some special properties: mold release agent, shrinkage reducer, rust inhibitor, air-entraining agent, surface hardener, etc.

The application of concrete waterproof admixture

Concrete waterproofing agent can significantly improve the impermeability and waterproofing function of concrete. The impermeability grade can reach P25 or higher. It also has the functions of retarding setting, early strength, water reduction, crack resistance, etc. It can improve the workability of fresh mortar: it can replace lime It is especially suitable for foreign house roof concrete, large-volume waterproof concrete, hydraulic concrete, waterproof mortar, etc., which can completely solve the problems of roof leakage, wet wall and groundwater leakage. The cheapest, ideal and reliable material of choice in China.

Concrete waterproof admixture price

The price of concrete waterproofing admixtures will change randomly with the production cost, transportation cost, international situation and market supply and demand of concrete waterproofing admixture. Tanki New Materials Co., Ltd. aims to help industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full range of customized services. If you are looking for concrete waterproofing admixture, please feel free to send an inquiry to get the latest price of concrete waterproofing admixture.

Concrete waterproof admixture supplier

As a global supplier of concrete waterproofing admixtures, Tanki New Materials has extensive experience in the performance, application and cost-effective manufacturing of advanced and engineered materials. The company has successfully developed a series of powder materials (including water-based stearic acid emulsion, water-based calcium stearate, zinc stearate, etc.), high-purity target materials, functional ceramics and structural devices, and provides OEM services.

Technical parameters of concrete waterproof admixture

(1) The dosage range is 0.2-0.4%, and the specific dosage should be determined by a small amount of experiments.

(2) On-site mixing, first mix with stone, sand, cement and other admixtures once, then add water and mix well.

Precautions for concrete waterproofing admixtures.

(1) When replacing cement or adding new cement, a concrete compatibility test should be carried out.

(2) When mixing with other additives, please confirm their compatibility first.

(3) The mixing ratio should be carried out, and the concrete should be poured in strict accordance with the construction specifications.

(4) As with conventional concrete, it is necessary to strengthen the curing according to the construction specifications.

(5) For waterproof concrete in corrosive medium, when the anti-corrosion coefficient is less than 0.8, anti-corrosion measures should be taken. The surface temperature of the hydrophobic concrete structure should not exceed 100°C, otherwise protective measures must be taken. Cut off the heat source.

Packaging and storage of concrete waterproof outer packaging

(1) 200kg plastic drum or customized according to customer requirements.

(2) Store at 5-30℃, avoid contact with strong acid and alkali.

(3) Shelf life is 24 months.