Study on the Preparation of Full Solid Waste-Based Concrete from Tailings and Waste Rock Mixed Sand

Conducting an analysis of the fundamental properties and mineralogy of the tailings waste rock, we have employed the method of proportion design commonly used in ordinary concrete to develop a C40 grade full solid waste-based concrete. Under the same water-binder ratios investigates full solid waste-based concrete composed of machine-made sand and a mixture of full solid waste-based concrete blended with 150 kg/m3 of iron tailing sand and machine-made sand. And assess the workability properties of full solid waste-based concrete produced from waste rock with. The results indicate that the fluidity and compressive strength of mechanism sand made from full solid waste rate. Conversely, when iron tailing sand is mixed, both fluidity and compressive strength increase. The optimal sand rate is found to be 39%, resulting in a slump value of 220 mm and 90 d compressive strength of 47.3 MPa, meeting the requirements for C40 grade concrete. Through SEM electron microscopy, it is evident that the interface between the mixed sand and cementitious materials. Combination is intricately interwoven with fine particles in between coarse particles thereby reducing voids in the interface transition zone, enhancing concrete compactness, and augmenting its mechanical properties.