How sand is made - material, manufacture, making, history, used .Process. The preparation of sand consists of five basic processes: natural decomposition, extraction, sorting, washing, and in some cases crushing. The first process, natural decomposition, usually takes millions of years. The other processes take considerably less time. The processing plant is located in the immediate.sand crushing process,Acrobat(PDF)plummeting overall aggregate requirement, natural sand supplies were dwindling faster than the need for concrete. This led Kotobuki Engineering & Manufacturing. Co. Ltd. (Kemco) to devise a process for the manufacture of consistent specification sand, using crushed rock as a feedstock. The resulting system is known as.