Effect of Silica Sand Filler on Mechanical Properties of Epoxy Grout for Composite Repair of Steel Pipelines

Abstract

Oil and gas pipes are vulnerable to failure initiated by corrosion because of their operating pressure under adverse conditions. A composite repair assembled around the pipe with a small gap that is then infilled with epoxy grout is considered a suitable option for repairing corroded pipelines. This article presents an investigation into the mechanical properties (compressive, tensile, and flexural) of epoxy grout, with and without inclusion of silica sand as a filler. The mechanical tests were carried out in accordance with American Society for Testing and Materials standards. Experimental results on mechanical properties indicate that the strength in tensile and flexural mode for the grout decreases with the inclusion of filler because of a weak interface between the matrix and filler. However, the addition of filler in grout showed an increase in compressive, tensile, and flexural modulus. Based on suggested properties in a previous study, both grouts have the potential to be used on structural rehabilitation, especially for repairing damaged pipeline.

Mecanismos de dano em reparos de materiais poliméricos e compósitos em tubulações offshore: uma revisão integrativa

“…Segundo a Agência Nacional de Petróleo, Gás Natural e Biocombustíveis (ANP), 93,67% da produção de hidrocarbonetos no território brasileiro se dá no ambiente offshore. Neste ambiente, as tubulações de plantas de processamento de petróleo estão suscetíveis a corrosão, fadiga, abrasão e diversos outros mecanismos de dano, sendo necessário realizar reparos para sanar vazamentos de fluidos com grande potencial de risco, a fim de continuar a operação de forma segura (ANP, 2021;AZRAAI et al, 2020).…”

Degradation of Glass Fiber Reinforced Polymer (GFRP) Material Exposed to Tropical Atmospheric Condition

“…: carbon, glass, aramid) to create a combination of the desired mechanical properties. The increasing in the applications of FRPs in the different industries is because of some noticeable advantages such as a high strength with low density, corrosion resistance, resistance to impact and friction, thermal stability, sound insulation, ease of handling and outstanding optical and electrical properties [1][2][3][4][5] Glass Fibre Reinforced Polymers (GFRPs) have been recently implemented in some engineering applications that involve repairing, rehabilitations or replacing the deteriorated existing structures. In marine and underground structures such as oil and gas pipelines, GFRP composites are an effective technique to retrofit any possible damages that might occur in those structures [6][7][8][9] Atmospheric environment is defined as the air envelope around the Earth including its interfaces and interactions with the solid or liquid surface of the Earth.…”