Effect of hygrothermal conditioning on the mechanical and thermal properties of epoxy grouts for offshore pipeline rehabilitation

This paper reports an extensive comparison of the effect of long term ageing in three epoxy grouts underwater at elevated temperature to assess performance, which is scarce in current available literature

Md Shamsuddoha; 1 Centre for Future Materials

2016

Scholarcy highlights

  • Global energy demand is expected to grow in the decades and fossil fuels will continue to act as the dominant source of energy all over the world
  • The compressive and tensile strength of the unconditioned grouts ranges from 100–120 MPa, and 19–32 MPa, respectively, which indicates that these grouts are suitable for structural rehabilitation of the pipelines
  • While epoxy grouts are often recommended due to superior properties and ease of application, limited information are available on the long-term properties of epoxies especially when exposed to harsh environmental conditions including elevated temperature, which are taken into consideration while designing the pipelines
  • This paper reports an extensive comparison of the effect of long term ageing in three epoxy grouts underwater at elevated temperature to assess performance, which is scarce in current available literature
  • The grouts were hot-wet conditioned for 1000 hours at 70 oC and tested at 65 °C to observe the effect of elevated temperature hygrothermal conditioning resembling an offshore underwater service environment for pipeline rehabilitation
  • Tensile and flexural moduli of the hot-wet conditioned grout decrease by more than 90% compared to unconditioned grouts
  • The compressive strength and modulus of the investigated grouts range from 100–120 MPa, and 5.6–11.0 GPa, respectively indicating their suitability for structural rehabilitation of offshore pipelines
  • The following conclusions can be drawn from the results: The average moisture absorption is observed for the grouts within a range of about 0.5–2.7% after 1000 hours, when two of the three grouts achieved saturation, indicating that extended conditioning beyond 1000 hours may be necessary to achieve saturation for specific grout of interest

Need more features? Save interactive summary cards to your Scholarcy Library.