The addition of denitrifying bacteria to recycled coarse aggregate concrete can significantly improve its freeze-thaw resistance Concrete is one of the most frequently used construction materials due to its cheap cost, strong compressive strength, and ease of manufacture. However, natural aggregate
The researchers found that adding denitrifying bacteria can improve the compressive strength and tensile splitting strength by 30.3% and 20.3%, respectively.
Although recycled materials may be used in lieu of natural materials to create recycled coarse aggregate concrete , doing so may cause a number of issues. This is particularly true in colder climates where daily freeze-thaw cycles can damage concrete and compromise its structural integrity often leading to safety issues.applied denitrifying bacteria to recycled coarse aggregate and improved the strength and durability of the concrete.
During freeze-thaw cycles, water penetrates the concrete, creating cracks in the structure, and reducing its durability. When the water freezes, it expands. The more water, the more swelling, and the more swelling, the more damage. “Based on our experiment, denitrifying bacteria can improve the compressive strength and tensile splitting strength by 30.3% and 20.3%, respectively.
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