Overview of Lightweight Concrete
Lightweight concrete, also known as foam concrete, is foamed through the foaming system of the foaming machine, which is fully foamed by mechanical means. The foam and cement slurry is evenly mixed, and then a new lightweight thermal insulation material, which contains a large number of closed pores, is formed by the pumping system of the foaming machine for casting or molding.
Lightweight concrete is usually made of foam solution by mechanical means. The foam is added to the slurry containing siliceous materials, calcareous materials, water and various admixtures. After mixing stirring, pouring and curing, the lightweight concrete is formed.
Lightweight concrete has good characteristics such as lightweight, strong waterproof performance, good environmental protection performance and good thermal insulation performance. It is widely used in energy-saving wall materials, mainly cast-in-situ roof insulation layer, lightweight wallboard, compensation foundation, etc. Making full use of the good characteristics of lightweight concrete can expand its application field in construction engineering, speed up the project progress and improve the project quality.
Overview of Lightweight Concrete Additives
Foaming agent is refers to the liquid surface tension can reduce, produce a large number of uniform and stable foam, for the production of foam concrete admixtures. A foaming agent is a substance that causes its aqueous solution to produce large amounts of foam when mechanical forces are applied to the air. This substance is a surfactant or surfactant. The essence of foaming agent is its surface activity. No surface activity, can not foam, also can not become a foaming agent, surface activity is the core of foaming.
Characteristics and Advantages of Lightweight Concrete Admixtures
Low density: Lightweight concrete admixtures can reduce the density of concrete, thereby reducing the weight of the building.
High strength: Lightweight concrete admixtures can increase the compressive, tensile and flexural strength of concrete and improve its durability and stability.
Good thermal insulation performance: lightweight concrete admixtures have good thermal insulation properties and can effectively reduce the energy consumption of buildings.
Good construction performance: lightweight concrete admixtures can improve the workability and fluidity of concrete, increase construction efficiency, and shorten the construction period.
Environmentally friendly and sustainable: The production and use of lightweight concrete admixtures will not have a negative impact on the environment and comply with environmental protection requirements.
Application of Foaming Agent
1)
Ground radiant heating insulation layer and roof insulation
2)
Filled wall blocks inside and outside the building, soundproof walls
3)
Heat preservation, moisture-proof and anticorrosion of municipal pipelines such as water supply, heating and oil pipelines
4)
Construction of plant cultivation greenhouses and storage freezers
5)
Fill the gaps in the tunnel and gaps in the building
6)
Basic laying of sidewalks, sports fields and pitches
Company Profile
Luoyang Trunnano Tech Co., Ltd is professional in lightweight concrete and concrete admixtures solutions,for 10 years+, which is a professional company with supply and marketing integration.
We can supply high-quality concrete foaming agent, superplasticizer, aerogel and foam concrete strength enhancer for lightweight concrete mix, CLC blocks all over the world.
The company has a professional technical department and Quality Supervision Department, a well-equipped laboratory, and equipped with advanced testing equipment and after-sales customer service center.Send us an email or click on the needed products to send an inquiry.
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1) Store in a dry environment at room temperature.
2) Avoid damp and high temperature.
3) Use immediately after opening the inner packing bag.
FAQ
Q1:
What range are lightweight concrete admixtures suitable for?
Re:
Concrete structures that need to reduce the weight of buildings, such as high-rise buildings, long-span bridges, etc.
Buildings that need to improve the thermal insulation performance of concrete, such as energy-saving buildings, green buildings, etc.
Projects that need to improve concrete construction efficiency and improve concrete performance, such as large-scale concrete pouring, precast concrete components, etc.
Concrete structures that need to adapt to special environments and usage requirements, such as marine engineering, chemical industry buildings, etc.
Q2:
What are the main disadvantages of lightweight concrete admixtures?
Re:
May affect the hardening process of concrete, resulting in a decrease in the strength and durability of concrete.
May increase the shrinkage of concrete, causing concrete cracking and deformation.
It may affect the construction performance of concrete, making it difficult to mix and pour concrete.
It may increase the porosity of concrete and reduce the impermeability of concrete.
Q3:
What are the differences between lightweight concrete and foam concrete?
Re:
Ingredients: The main ingredients of lightweight concrete are cement, sand, slag powder, expansion agent, etc. The main ingredients of foam concrete are cement, sand and foaming agent. Foaming agent is a substance that can produce a large amount of foam and reduce the weight of concrete.
Strength: Foam concrete has low strength and is generally used in projects with low strength requirements, such as insulation materials. Lightweight concrete has higher strength and can be used in projects with higher strength requirements, such as load-bearing walls of high-rise buildings.
Density: Foam concrete has a smaller density and lighter weight, so it is often used in projects that have special requirements on weight, such as bridges. Lightweight concrete has a higher density and heavier weight, so it is often used in projects that require higher stability, such as the roadbed of highways.
Production method: Foam concrete is made by uniformly mixing the foaming agent and cement slurry through the foaming system of the foaming machine, and then through the pumping system of the foaming machine for cast-in-place construction or mold forming. Lightweight concrete is made by mixing cement, sand, slag powder, expansion agent and other materials in a certain proportion.
Q4:
What are the differences between lightweight concrete and cement concrete?
Re:
Density: The bulk density of lightweight concrete shall not exceed 1900kg/m³, which is much smaller than the density of cement concrete.
Thermal insulation performance: Lightweight concrete has excellent thermal insulation performance, while cement concrete has poor thermal insulation performance.
Impermeability grade: Lightweight concrete has a higher impermeability grade and has good durability and durability. In comparison, cement concrete has a lower impermeability rating.
Fire resistance: The fire resistance of lightweight concrete is better than that of cement concrete.
Construction adaptability: Lightweight concrete has strong construction adaptability. Concrete materials with different densities and compressive strengths can be configured according to the different main uses and bearing capacity of the building. Its construction is simple and adaptable to various construction methods. Industrial production. The construction of cement concrete is relatively simple.
Q5:
For what projects may lightweight concrete be more suitable than cement concrete?
Re:
Projects that need to reduce the weight of the structure: Since lightweight concrete has a lower density, it can reduce the weight of the structure, so it is suitable for projects that need to reduce the weight of the structure, such as high-rise buildings and long-span bridges.
Projects that require thermal insulation: Lightweight concrete has good thermal insulation performance and is suitable for energy-saving buildings, green buildings and other projects that require thermal insulation.
Projects that require special requirements: such as rock walls and retaining walls in harbors, require the use of lightweight concrete to meet specific engineering needs.
Q6:
What is the strength and strength range of lightweight concrete?
Re:
The strength and strength range of lightweight concrete vary depending on the specific mix and use. Generally speaking, the compressive strength of lightweight concrete is between 5-40MPa, which is relatively low compared with other concretes. However, some lightweight concretes can be specially treated or have reinforcements added to increase their strength to meet the needs of a specific project.
In addition, the density level of lightweight concrete is generally between 300-1200kg/m³, and its strength level is formulated according to actual needs. For example, lightweight high-strength concrete (LHSC) is a concrete with a strength grade of no less than 60MPa, and its compressive strength is much higher than ordinary concrete.
Therefore, the strength and strength range of lightweight concrete need to be determined according to specific circumstances, and different proportions and uses determine its specific strength value.
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