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This project aims to investigate the effect of polymer (partially hydrolyzed polyacrylamide - PHPA) concentration and hence solution viscosity on the settling behaviour of sand particles. The results will help drilling engineers understand the effect of borehole open period on the amount of sediments accumulated at the base of the borehole. (see p. 75 of Piling Engineer for description of the problem) Materials: PHPA solution (mixed with DI water and soda ash to pH 10.0) at various concentrations; sand particles will be Thanet Sand which is a natural sand commonly found in the London area. Note: Flow curves and Marsh funnel data for this polymer has already been obtained so theoretical calcs can also be made. Test equipment: Turbiscan for the sedimentation tests; Marsh funnel or Bohlin rheometer for confirmation of solution viscosity. Initial reading:
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