anionic hydrolyzed polyacrylamide phpa polymer for bored pile

anionic hydrolyzed polyacrylamide phpa polymer for bored pile
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  • Can partially hydrolyzed polyacrylamide (PHPA) polymer fluid be used to drill into soil?
  • The present study conducted a comprehensive investigation of partially hydrolyzed polyacrylamide (PHPA) polymer fluids, an alternative to bentonite ones, to drill into a soil-limestone mixture. The fluid flow pattern, aging behavior, and the influence of finer silty clay on polymer fluid were explored.
  • What is partially hydrolyzed polyacrylamide (PHPA)?
  • Partially hydrolyzed polyacrylamide (PHPA) is the most frequently used polymer in this respect, owing to its low cost, viscosifying nature, and well-known physiochemical properties (Urbissinova et al. 2010 ). The molecule of this polymer is a flexible chain which remains in coil-like structure in the absence of a shearing effect.
  • Are aqueous solutions of partially hydrolyzed polyacrylamides used in deep foundations?
  • Since the early 1990s, aqueous solutions of partially hydrolyzed polyacrylamides (PHPA) also have been used for the construction of deep foundations in many different countries (e.g., Ata and O’Neill 1997; Lam and Jefferis 2014b). PHPA is a synthetic polymer comprising repeating units of acrylamides and acrylates.
  • Which polyacrylamide is used to prepare test fluids?
  • A commercial partially hydrolyzed polyacrylamide (PHPA) known as Shore Pac was used to prepare the test fluids. It was supplied in dry granular form by CETCO Drilling Products. The molecular weight and the degree of hydrolysis of this material have been determined to be 2 0 × 1 0 6 g / m o l and 39% respectively.