An Investigation into the Use of Manufactured Sand as a 100 . - MDPIJun 2, 2016 . An Investigation into the Use of Manufactured Sand as a Replacement for Fine Aggregate in Concrete. Martins Pilegis, Diane Gardner * and Robert Lark. Cardiff School of Engineering, Cardiff University, Queens Buildings, Cardiff CF24 3AA, UK;. PilegisMcardiff (M.P.); Larkcardiff (R.L.).application of manufactured sand,Use of Manufactured Sand in Concrete and Construction An .Natural or River sand are weathered and worn out particles of rocks and are of various grades or sizes depending upon the amount of wearing. Now-a-days good sand is not readily available, it is transported from a long distance. Those resources are also exhausting very rapidly. So it is a need of the time to find some.