Is there a substitute for sand in constructions? - QuoraKhalifa S Al Jabri of Oman in his findings published in the internationally referred journals such as Cement and Concrete Composites and Construction and Building Materials in 2006 recommends that 50 per cent copper slag can be used as replacement of sand in order to obtain concrete with good strength and durability.which is the best substitute of sand for construction,Alternatives to sand in construction. - Pooja Chaphalkar :: ArchitectRiver waters are now behind dams due to which the sand does not get continually replenished like before. Riverine habitats get destroyed as mechanical dredgers are used. hence finding alternatives to sand in the construction sector is crucial. Where sand use is critical: For the plastering of buildings. For good concrete.