Experimental Study on Quarry Dust Cement Mortar with Bacteria

As the world’s population continues to grow at an alarming rate, cities are being built up at a rate that is detrimental to the environment. Sand, a natural resource, is a key ingredient of cement mortar, the most popular building material. The scarcity of fine aggregate is the primary worry as the demand for sand grows. Quarry dust is a by-product of quarrying. Quarry dust is generally 5–7% per ton crushing quarry aggregate. Before quarry dust is replaced with natural sand in cement mortar, the physical and chemical properties of the two are examined. However, it seems to have virtually the same qualities. Quarry dust and Bacillus pesteurii bacteria at various concentrations like 105, 106, 107, and 108 cell/ml are used to substitute natural sand in this study because Bacillus pesteurii may form calcium carbonate (CaCO3) as a filler material and serve as a binding element in cement mortars. Bacterial mortar has a higher compressive strength than ordinary mortar or sustainable mortar, according to this research. A 107 cell/ml cell concentration yields a compressive strength test result of 31.01 N/mm2. This way, a cost-effective and environmentally friendly cement mortar may be utilized to recycle trash and safeguard the environment.