Iranian Researchers Manufacture Strong Recycled Concrete from Construction Waste
“The purpose of this innovative project was to reuse and recycle various materials remaining from the demolition of buildings, concrete factory waste and construction waste to prevent the wastage of cement and its destructive impacts (on the environment),” Ali Salar Keyhani said.
“For the first time, we succeeded in making and producing recycled concrete with high strength which is also a complete insulation of cold, heat and humidity, and is highly important from the environmental point of view and prevents the loss of capital,” he added.
Keyhani said that the recycled concrete has no foreign counterparts and is made with fully Iranian technical know-how.
In a relevant development in December, a student of Islamic Azad University’s Tabriz branch had also succeeded in inventing and manufacturing high-strength and high-resistance environmentally friendly recycled concrete by using nanotechnology.
“In this innovative project, after collecting and depositing the construction debris and waste in several stages, we separate them with new methods and then after the disposal stage of plaster and metal waste and other unusable data-x-items in the project, advanced washing is carried out in a closed space, the water of which is recycled and returns to the cycle, and the materials are washed clean and become free of harmful substances,” said Davoud Beheshtizadeh, a PhD student of civil engineering at Islamic Azad University’s Tabriz branch.
“In the next stage, inventive materials, including liquid composition of microsilica in a dose of 5%, 5% grout, metakaolin powder and raw perlite powder brought from the mining site and uncooked, are added,” he explained.
“The final stage of granulation of materials will be similar to the sand washing system and the prepared concrete can be used in production of concrete and new concrete and construction products,” Beheshtizadeh said.
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