Recently, a construction company in Hanoi caused a stir by launching an apartment for only VND 195 million for 50m2. These apartments are cheap due to the use of new materials such as lightweight concrete platforms to pour foundations, 3D panels to build walls.

According to Dr. Nguyen Van Chanh, Department of Building Materials, Faculty of Civil Engineering, Ho Chi Minh City University of Technology: The world is currently applying successfully manufactured foam concrete with the main ingredient of cement but adding additives. Foaming and fiber reinforced polymer polymers. “When mixed, the air bubbles are spread evenly so the lightweight concrete structure only weighs about 230-900kg / m3 which is much lighter than ordinary concrete”.

According to scientists, the cost of foundation accounts for nearly 20% of the value of the house. If built on soft ground, this percentage accounts for 40% but replaced by light concrete, the foundation cost is only 5 to 7% but the strength is not less reinforced concrete.

Lightweight concrete slabs have been used to build and assemble hundreds of houses for workers in Linh Trung industrial park, Thu Duc, Ho Chi Minh City and in 11 districts and towns in Dong Thap province.

Dr. Nguyen Van Chanh and engineer Phan Huynh Phuong have successfully manufactured lightweight concrete using corn core. The advantage of this concrete is that it has relatively high tensile and flexural strength, high impact resistance than normal concrete. The material to produce this concrete is easy to find, suitable in places where clay bricks cannot be manufactured.

3D panels have been in Vietnam for a long time, but so far the application of this material has been almost negligible. Mr. Tran Quang Hoang, head of investment at Saigon Incomex Group, said the 3D plate has a 3-dimensional structure, formed by interlocking steel grids, the grid density is 50 – 50mm, sandwiched in the middle is the sheet. porous. Currently there are 2 types of foam: regular and fireproof, in which fire-proof is more expensive than 15,000 VND / m2.

3D ribs are made from cold-drawn steel, about 3.8 mm in diameter. When building a house, people will apply cement mortar on both sides of this 3D panel. 3D panels have a light weight, weighs only about 60% compared to similar works built with traditional materials, so they are suitable for construction on soft ground in Ho Chi Minh City and the Southern Delta.

3D panels are also capable of withstanding 7.5 magnitude earthquakes thanks to the two sides of high-strength steel and three-dimensional zinc knitting, and withstand storms of up to 300 km per hour; Sound insulation, insulation, fire resistance at good heat.

According to Mr. Tran Quang Hoang, the price of 3D panels is also cheaper than traditional construction materials. If calculating 1m2 of ground, depending on the design of the house, the price is from 2.3 to 2.4 million per m2. Fourth-class houses are about VND 2.2 million per m2, adjacent houses cost about VND 1.5 – 1.8 million / m2.

On the other hand, 3D panels reduce the cost as well as the time in the rough construction process because it is easy, fast, shortens construction time by 30%, saving labor costs, formwork, support trees, favorable Convenient construction in remote areas, in alleys or put up. Typical constructions using 3D technology such as Dai Nam tourist area, Binh Duong; Nam Long Villa Area, District 7; The villa area of ​​District 2 …

Mr. Le Hoang Chau, Chairman of Ho Chi Minh City Real Estate Association said: “Low cost is an advantage for 3D-panel builders to make a breakthrough, even a craze in the housing market. Future”.