With its incredible strength, concrete is widely used in the global construction industry. Unfortunately, the hard other side of the concrete is the lack of anti-bending properties. The good news is that researchers at Sweeburn University have developed a new type of concrete. Not only does it reduce its carbon footprint (no cement needs to be made), it also has better bendable properties.
(From: Swinburne University)
If the huge weight is evenly distributed on the concrete column, the material will not change visible to the naked eye. But if the pressure is concentrated at the center point of the pillar, the concrete bends relatively quickly and even breaks.
This is because, although the concrete has a high pressure strength, it leaves behind short plates with low tensile strength. With this in mind, researchers have not stopped improving concrete resistance for decades.
In addition, in the production process of concrete, as a wet mixture to maintain together the “special glue” cement, but also will cause a lot of pollution.
Ordinary concrete “hard and easy to fold”
This is because the production of cement requires high temperatures, a process that consumes a lot of energy and emits huge amounts of greenhouse gases.
Although there are new types of concrete with better tensile strength, they have not completely abandoned the use of cement as a formula.
The research team says the main raw material for the new type of concrete it develops is industrial waste such as fly ash, one of the air pollution sources in coal-fired power plants.
And because polymer composites of this texture can be cured at room temperature, the manufacturing process is also more environmentally friendly.
Previously, this alternative process was also used in the production of conventional concrete. Now, however, it has been used in bendable concrete products.
Bendable cement-free concrete (via)
“The new concrete production process reduces energy consumption by about 36 percent, while reducing CO2 by up to 76 percent,” said research author Behzad Nematollahi.
Laboratory tests show that the new type of concrete has about 400 times more tensile properties than ordinary concrete, with similar strength.
Even if the new material eventually breaks, the tiny polymeric fibers in the mixture ensure that they do not break. Instead, it remains strong under tension and has several small cracks.
Looking ahead, the new type of concrete can be used in earthquake-prone areas, so that it can withstand conventional vibrations without being found to weaken the structural strength after the earthquake.
Details of the study have been published in the recent journal Construction and Building Materials.
Originally published as Micromechanics-based of-a-am ambien temperature cured one-part strain-hardening geopolymer c omposite.