Grouting is effective in both sand and silt deposits. Grouts are liquid suspensions or solutions that are injected into the soil mass to improve its behaviour. Such liquids can permeate into the void space of the soil and bind the soil particles together. For medium sands or coarser materials the grout used most often is a slurry of water and cement. This slurry however, cannot enter into the void space of fine sand and silts for which chemical grouts are used.