- Provides best air concrete solutions
- airconcretesolutions@nanotrun.com
Light aggregates are used in construction industry to produce concrete with lightweight properties. They are mainly used in structural elements and they are available in different densities.
Lightweight aggregates can be prepared from a variety of materials. In particular, the flue ash from burning coal is utilized as a coarse aggregate. The other types of light aggregates include pumice and vermiculite.
The use of lightweight aggregates in construction has grown rapidly in recent years. However, lightweight aggregates have a number of disadvantages. For example, they are susceptible to freeze/thaw cycles. These factors influence the performance of concrete made with these materials.
A recent research program has compared the performance of two different types of lightweight aggregates in one concrete. This study examined the influence of various saturation levels on the physical and chemical properties of these aggregates.
The results showed that the porous granules of light aggregates had a compressive strength of 1.1-1.7 MPa in a cylinder. They also had a higher mechanical strength than other light aggregates.
The performance of lightweight aggregates was assessed through a compaction factor test and a rebound hammer compressive strength. It was found that the porous granules had a higher water-cement ratio than the other aggregates. Besides, the weight of the aggregate decreased to a level of 300-420 kg / m3.
The granules are produced by grinding the igneous rock screenings. They are then dried and calcined.
The granules are sintered at high temperatures in a rotary kiln. The sintering process is designed to produce a coating that is less porous than the internal structure of the aggregate.
Inquiry us [contact-form-7 id="26" title="tongrun-form"]
Superplasticizers (SPCs) are a type of plasticizers which enhance the performance of concrete. They are used to improve the workability of concrete, reduce the water content, and produce higher strength and compression properties.
SPCs can be divided into two categories. The first category includes those products which are mainly made from polycarboxylate ethers, or PCEs. PCEs are very powerful and can be manipulated to achieve a desired property.
The second category contains those superplasticizers which are made from sulphonated melamine formaldehyde. These products are particularly beneficial in high-strength gypsum materials and readymix mortars.
Some superplasticizers are also made from other compounds, such as sodum naphthalene. However, they have different compositions and can produce different effects on concrete. Generally, they have greater water reductions than traditional water-reducing additives.
There are several types of superplasticizers available in the market, including the sulphonated melamine formaldehyde superplasticizer, sodum naphthalene superplasticizer, and polycarboxylate ether superplasticizer. Each one has its own benefits and drawbacks.
SMF superplasticizer is especially good for creating strong, durable, and fluid concrete. It is also used as a brightener for colored cement blocks.
The main mechanism of SNF/SMF superplasticizers is electrostatic repulsion. In this type of superplasticizer, the negative charges on the admixtures adsorb onto positively charged calcium ions on the surface of the cement. This produces an adsorption layer on the surface of the cement.
When the superplasticizers are combined with SRA additives, the results are further enhanced. Moreover, they can be utilized in a wide variety of applications.
Inquiry us [contact-form-7 id="26" title="tongrun-form"]
Admixtures are used in concrete to speed up the setting time. They also increase the early strength of the concrete. These additives can be added before or during the mixing process. Some of them are made from chemical or mineral sources, while others are added at the factory.
One of the most common accelerators is calcium chloride. Calcium chloride is available in pellets and flakes. You can purchase it from most local hardware stores. In addition to its effect in speeding up the setting time of concrete, calcium chloride can also improve the workability of the mix.
Alternatively, you can add a water-reducing admixture. Water-reducing admixtures can provide more fluidity to the concrete and can be useful for slipform construction or for long-distance transportation. Another option is to use a corrosion inhibitor. It can be effective in marine environments and in bridges and parking structures. However, this effect does not have a great impact on the strength of the concrete.
Other accelerating admixtures include sodium thiocyanate, triethanolamine, and calcium formate. Each of these admixtures can be used in combination with other admixtures, depending on the concrete's application.
The final set time of the concrete is determined by the amount of accelerator added, the temperature of the water, and the dosage rate. Conventional set retarders, on the other hand, slow down the hydration process, making the concrete harder. Although they can be effective, conventional set retarders tend to wear off quickly.
Inquiry us [contact-form-7 id="26" title="tongrun-form"]
There are many types of release agents for use in concrete, including powder and liquid releases. Powdered release agents are used before the final troweling stage of a project. The agent is flicked onto the surface of the concrete with the wrist.
Liquid releases are easier to work with and require less cleanup. They must be mixed thoroughly, so they do not settle. In addition, it is best to use a pump sprayer to apply them.
It is important to select a form release oil that is non-corrosive and mild. It should also be free of waxes. If a form has a waxy surface, you can use a rag to wipe it off.
A dark pigment can be added to the release agent to create a more realistic look. However, it can affect the quality of the imprint.
To prevent the color of your concrete from fading, use a thin, even layer of release agent. You can apply the release in the grout lines, or in the lower recesses of the pattern.
During the stamping process, the remaining release agent will be depressed into the surface paste. This will allow sealer to adhere. Once the stamp is completely pressed, the release color will lighten.
It is important to remember that too much release agent can make the pattern look choppy and uneven. For this reason, the quality of the release agent is a major factor in the appearance of your finished project.
Inquiry us [contact-form-7 id="26" title="tongrun-form"]
Admixtures are materials that are added to concrete to alter the mix's properties. They improve the strength, workability, and durability of the concrete. Admixtures can be used before or during the mixing process. The effectiveness of admixtures depends on the type of cement, water content, and the amount of time the concrete is exposed to high temperatures.
There are several common types of admixtures, including air-entraining admixtures, retarding admixtures, water reducers, and mineral admixtures. Each of these has different strengths and can be used for different purposes.
Water-reducing admixtures reduce the amount of water in the concrete. Using these admixtures can help create a slump at a lower water-cement ratio, reducing the need for energy.
Air-entraining admixtures help to entrain micro-air bubbles in the concrete, which act as a physical buffer against stresses. These admixtures are compatible with almost all types of concrete admixtures.
Retarding admixtures help to delay the initial set of the concrete. They usually use metal oxides. It is important to note that most retarders will entrain air into the concrete. However, too much air will decrease the compressive strength of the concrete.
Accelerating admixtures speed up the setting and finishing operations of the concrete. This means less time to get the job done and can save money.
Various new types of admixtures have been developed to meet the needs of the construction industry. These new admixtures have the ability to reduce the production of Portland cement and can also provide environmental benefits.
Inquiry us [contact-form-7 id="26" title="tongrun-form"]
Using lightweight aggregate mortar for building reinforcement systems was investigated in this research. The main purpose of the study was to evaluate the bond between rebars and lightweight mortar. This research also evaluated the effect of different strategies for reinforcing structures.
Several factors influence the rheological behavior of lightweight mortar. One of them is the insertion of fibers. The fibers can be aligned unidirectionally or be inserted vertically. In this experiment, the fibers were inserted vertically. Depending on the position of the fibers, voids could form around the rebars.
The insertion of the reinforcement was done manually. This can lead to a large variation in the amount of fibers. Automatized insertion can reduce this variation. It can also be done with better accuracy and precision.
After insertion, the fibers were turned. This can increase the mechanical performance of the resulting structure. Also, the flexural strength can be increased by the use of fibers.
The flexural strength of the tested specimens ranged from 1.9 N/mm2 to 3.3 N/mm2. The results showed a higher flexural strength when the fibers were inserted in the lower layers. Besides, the fibers have a directional effect on the layer bond.
A horizontally deposited rebar increased the flexural strength by 600%. Despite the higher flexural strength, the rebars still required a high force to be inserted. Therefore, the flexural strength of the test specimens was affected by the rheology of the mortar.
Furthermore, the flexural strength of the tested specimens was assessed in pull-out tests. The pull-out tests showed that there was a high variability in the length of the protruding fiber.
Inquiry us [contact-form-7 id="26" title="tongrun-form"]
Conplast SP430 is a superplasticizer based on a selected sulphonated naphthalene polymer that improves the workability of concrete. It is non-flammable and has a shelf life of 12 months when stored under normal conditions.
Conplast SP430 is a highly effective admixture that enhances the workability and pumpability of concrete. The admixture also minimizes segregation and bleeding. This allows for easy construction and faster compaction. It is safe for use in reinforced and prestressed concrete.
The optimum dosage of the admixture should be determined by testing at the site. In practice, the total dosage may range from 0.5 to 2 litres of cement per 100 kg of concrete. Overdosage can lead to delayed setting of the concrete and additional air entrapment.
Conplast SP430 is compatible with all types of Portland cement. However, it should be stored at temperatures between 2degC and 40degC. Storage should be limited to a period of twelve months.
For best results, Conplast SP430 should be added at a rate of 0.7 to two litres/100 kg of cement. If the mix has a high cement content, the dosage should be slightly higher.
Conplast SP430 is particularly suitable for concrete that requires high early strength. However, it also provides a further boost of strength throughout the life of the concrete.
Conplast SP430 is supplied as a brown liquid that is immediately dispersible in water. It is recommended to mix the admixture in a truck mixer at a high speed.
Inquiry us [contact-form-7 id="26" title="tongrun-form"]
Polycarboxylate ether-based superplasticizers (PCEs) are used to improve the performance of concrete. They can help to reduce water content in concrete and other materials. These admixtures are available in powder form, in a liquid form, or in a spray. The advantages of using PCEs in concrete include the high strength, low water-to-cement ratio, and durability.
PCEs are chemically stable and environmentally safe. They are a good choice for concrete, especially precast concrete products. In addition, they can improve the durability of concrete, as well as its surface finish. Aside from that, they also have environmental benefits.
For instance, the PCE superplasticizer can reduce the amount of air in concrete. This will increase the concrete's resistance to shrinkage. Moreover, the reduction in water-to-cement ratio will allow for a larger number of mineral admixtures to be added.
As a result, the PCE superplasticizer has a great effect on the strength and the durability of concrete. Besides, it can help to lower the environmental pollution, carbon dioxide emissions, and the waste of non-renewable resources.
Moreover, the PCE concrete admixture can be used to reduce water by up to 25%. Thus, it can save a large amount of industrial waste. When compared with other types of admixtures, PCE has a very high efficiency in reducing water.
If you are looking for the best polycarboxylate ether superplasticizer, you should consider using PCE from Kingsun. It is a professional PCE superplasticizer manufacturer in China. Among its products, you can find PCEA, PCEI, and PCEM.
Inquiry us [contact-form-7 id="26" title="tongrun-form"]
If you're thinking of creating a stamped concrete project, you might want to consider using a concrete stamp release agent. These products are made from pigments, cement, and moisture repellant. They're applied to the surface of a freshly placed concrete slab and act as a bond breaker, preventing your tools from sticking.
Release agents come in powder and liquid form. Both are used to add subtle color accents to stamped concrete. Powder releases are often used to create a random antiquing effect. Liquid release agents are more commonly used in sensitive areas.
To use a powder release, start by distributing the powder over the surface of the freshly placed concrete. A dry tampico brush is the best tool to apply it with. It should be about eight inches wide and loaded with the release. Then, sweep away excess material.
Once the release is on the concrete, it is ready for stamping. Keep in mind that the darker the color, the more realistic the coloring. When the release has completely compacted into the concrete, the color will lighten.
Stamping a concrete slab can be a daunting task. You have to take care to ensure your finished project looks great. Whether you choose to create a marbled or antiqued look, or add some natural highlights to your flatwork, it is important to plan your project carefully.
Creating a stamped concrete surface requires plenty of time and patience. But with the right tools and techniques, your work will be a success.
Inquiry us [contact-form-7 id="26" title="tongrun-form"]