What is the difference between permeable concrete and ordinary concrete?
What is the difference between permeable concrete and general concrete?
The biggest difference between permeable concrete and general concrete is permeability, material composition, scope of application and cost. Because of its excellent permeability characteristics, permeable concrete can be used in municipal gardens and municipal drainage and other fields, and has been widely used in buildings, bridges, water conservancy projects and other fields. In addition, due to the fact that its raw material composition and construction method are very different from that of general concrete, there are higher requirements for the gradation of aggregates, the uniformity of mixtures, and the humidity during construction. Therefore, when choosing what kind of concrete, it must be considered comprehensively in combination with specific use occasions and requirements.
I. Introduction. In the contemporary construction industry, concrete is an indispensable and important raw material, and its types and applications are also very wide. In these structures, permeable concrete and plain concrete are the two commonly used types. Although they are both cement, there are many differences between the two. Through the comparative analysis of the two, people have a certain understanding of their respective characteristics and use.
Second, the proportion of raw materials.
1.Plain concrete.
Cement is made up of water, cement, aggregate (sand) and admixtures. On this basis, a new concrete structure system based on artificial neural network was proposed. The strength, durability and workability of plain concrete have a lot to do with the composition of its raw materials.
2.Permeable concrete.
Permeable concrete, on the other hand, is made by mixing cement, crushed stone, crushed concrete and other special aggregates, admixtures and water. Compared with general concrete, permeable concrete has a large aggregate volume and many pores, so it has strong permeability. In addition, in order to improve water permeability, specific additives can be added on the basis of water permeability.
3. Functional characteristics.
1.Plain concrete.
Cement concrete has high strength and good durability, and is suitable for all kinds of load-bearing and long-life requirements. However, due to its low permeability coefficient, it is easy to cause problems such as "heat island effect" and "rain island effect", which has a serious negative effect on the urban ecological environment.
2.Permeable concrete.
Permeable concrete is a new type of impermeable structure, which can reduce the drainage pressure in urban areas and reduce waterlogging in urban areas. At the same time, it also shows good advantages in anti-slip, noise reduction and ecological environment. However, cement-based materials have good water permeability, making them slightly inferior to general cement-based materials, so they are not suitable for high-load projects.
4. Applicable Scenarios.
1.Plain concrete.
Reinforced concrete has the advantages of high strength and durability, and has been used more and more in bridges, tunnels, high-rise buildings and other buildings. In addition, it has a wide range of applications on flat roads and squares.
2.Permeable concrete.
Permeable concrete is generally used in places with high requirements for permeability, such as sidewalks, bicycle paths, parking lots, etc. In this case, permeable concrete can not only improve the permeability characteristics of the pavement and reduce the drainage of municipal roads, but also has a good anti-skid, noise and other effects. In addition, there are great prospects for development in landscaping and ecological slope protection.
5. Construction and maintenance.
1.Plain concrete.
Plain concrete is a relatively easy to operate material, mainly including mixing, pouring, vibration, curing four stages. During the curing period, the surface layer of concrete should be sufficiently hydrated to promote its hydration to obtain the desired strength.
2.Permeable concrete.
The structure of permeable concrete is different from that of general concrete. In view of the demand for permeability, higher requirements are placed on the gradation and mixing uniformity of the aggregate during pouring. In addition, it is necessary to ensure that there is enough moisture during the curing period, but to prevent the accumulation of aggregates caused by excessive moisture.
Sixth, cost analysis.
1.Plain concrete.
Because of its wide range of raw materials and stable raw materials, the cost is low. In addition, because the pouring technology of cement mortar is relatively perfect, the cost of cement mortar is greatly reduced.
2.Permeable concrete.
Due to the use of unique aggregates and admixtures, the cost is relatively high. In addition, due to its own characteristics, its cost will be slightly higher than that of ordinary cement. However, due to its advantages such as good environmental protection and municipal sewage treatment, it is still a good investment.
Conclusions and prospects.
In short, in terms of material composition, performance characteristics, applicable occasions, construction maintenance and cost and other factors, there is a big difference between permeable concrete and general concrete. Permeable concrete has the characteristics of good permeability, anti-slip and noise reduction, and environmental friendliness, and its position in China's urban buildings is becoming increasingly prominent. However, the existing permeable concrete still faces some shortcomings, for example, its strength is low, and the cost is high. In the future, with the development of science and technology, as well as the continuous innovation of material technology, it is foreseeable that permeable concrete will be more and more widely used, and can fully demonstrate its superiority. Through the research of this project, it is expected that through the research of this project, the recycled aggregate concrete will not only have good mechanical properties, but also have good durability, and provide new ideas for China's future urban construction.