Cement-free sewage treatment concrete can prevent fat particles from sticking and corroding
The cement used to build concrete sewer systems around the world does a good job of helping clean our waste, but it also has its shortcomings. Scientists in Australia have developed a new cement-free solution. They believe that this solution can better solve the corrosiveness of these materials, while also helping to avoid troublesome fat accumulation, which will improve The cost.
The new cement-free concrete was developed by scientists at RMIT University in Australia, where we have seen many innovative ways to produce reinforced concrete. These methods include the reuse of steel slag as concrete aggregates and the processing of building ruins into new road materials. Now RMIT scientists have turned their attention to free lime.
This chemical compound is used in large quantities to produce ordinary Portland cement, but it also makes it vulnerable to corrosion in the highly acidic environment of the sewer system. In addition, residual lime can seep out of the concrete and contribute to cellulite, that is, grease masses of oil, fat and non-biodegradable substances, which can accumulate to several tons in weight and clog pipelines.
"Concrete sewer pipes in the world have long had durability issues," said Dr. Rajeev Roychand, who led the research. "Until now, there is still a big research gap in the development of environmentally friendly materials to protect sewers from corrosion and lipoma. But we have created concrete that is protective, strong and environmentally friendly-a perfect trio. "
Roychand and his team mainly used manufacturing by-products to combine nano-silica with fly ash, slag and hydrated lime to produce their new cement-free concrete. In the test, the team found that the strength standards of its concrete exceeded the strength standards required for sewage pipes, and the unique mixture greatly increased the service life.
"Our zero-cement concrete achieves multiple advantages: it is environmentally friendly, can reduce concrete corrosion by 96%, and completely eliminates residual lime that helps to form fat," Roychand said. "With further development, our zero cement concrete can be made into fully acid-resistant concrete."
The research was published in the journal Resources, Conservation and Recycling.
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