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Lightweight concrete with Vietnam's market

Over 60 years of the 20th century, many inventions have been light on Concrete Experts USA, Japan and European research and application in practice. To date, lightweight concrete has been common almost all over the world (with the exception of some least-developed countries such as Vietnam).

1.Tinh use of lightweight concrete in the world
Over 60 years of the 20th century, many inventions have been light on concrete specialists American, Japanese and European research and application in practice. To date, lightweight concrete has been common almost all over the world (with the exception of some least-developed countries such as Vietnam).

Since the lightweight concrete to replace the bricks used in construction, bricks (raw materials from natural land) in the advanced countries have banned the use purpose of protecting the ecological environment National . Besides mild type of concrete structure is made from foam made available (also called foam concrete) have also been many national scientific and technological base as high as U.S., Germany, France, Japan ... to handle multiple applications in geo-technical issues as important as background to the highway, anti-slip subsidence in the mountains or hilly areas with weak technical performance - enormous economic.

2. The advantages of lightweight concrete application in Vietnam
Old, the building materials covering the walls yeuo Vietnam is still bricks (from natural materials from land). Every year, according to recent statistics, the country to use less 60.000.000/m3 bricks which is 70-80% bricks manual (a wood burning materials, wood from the forest) cause destruction severe environmental damage (possible equivalence bomb B52/nam 1000) Under these circumstances, the Prime Minister had decided 115/2001 dated 01/08/2001 which stated their intention to "proceed to eliminate the use of bricks manually in suburban areas in 2005 and on a national scale in 2010. " This is a legal basis is extremely important for those interested in research and development production of lightweight concrete in Vietnam.

In particular, tend to build high buildings rising recently, Vietnam has many areas with soft soil, the use of lightweight concrete will bring tremendous efficiency:

- Reduce the load for the project, leading to reduced funding and handling the foundation's structural system. Reduce the negative effects of using bricks while contributing to reduce the total construction investment of 7-10%.

- Lightweight concrete blocks are usually larger than bricks baked so many times can contribute to speed up construction and complete the covering of the works from 2-5 times.
Insulating ability of lightweight concrete several times higher than regular bricks, or concrete, so when used as wall covering, or roof against heat will make the house warm in winter, cooler in summer, contributing the energy savings for heating or air conditioning

On the other hand, made from lightweight concrete creating bubbles before been applied in the processing of geo-technical issues such as road base, bridge re-opened lower against the weak ground subsidence in the developed countries like Britain, American, French, Japanese ... and bring economic efficiency, technical, social enormous.

3. The difficulties in the use of lightweight concrete in Vietnam

Because the manufacturer of bricks almost no cost of land material. Raw materials are burned back from the arbitrary exploitation of forests should be very cheap production costs of bricks, bricks manually is usually much lower than its true value.

From there make the competition very unfair compared to calves
lightweight concrete (made from materials which are strictly managed, easy to control.)
On the other hand, the management of natural resources and environment in Vietnam is very arbitrary, relaxed, or serious lack of overlap, although the government should not at times prompted with many legal provisions clear, but the problem of "bricks" so far has not been resolved in a positive way. Also, do not make the first step to be able to effectively replace the "bad habit" is used in people's bricks.

Many state units - for immediate profit, irresponsible, and weak or lacking in access and process information - should not be exemplary, but has no hand, bad examples in social work often knowing or intentional use of bricks in construction craft projects. The fact that we could not achieve 115 Decision of the Prime Minister (2005 to remove the bricks used in construction in suburban areas) have demonstrated this clearly.

Applications in construction:

1. Roof and floor insulation

2. Trench fill the ditches

3. Fill holes

4. Building walls

5. Foundation piers

6. Tunnel Construction

7. Casting light concrete bricks to build

8. Walls and insulation panels