Heat - Initiated Furan Resin for Rapid Runway Repair

摘要

This project established the feasibility of a furan polymer concrete composition utilizing an inorganic latent catalyst which achieves a longer working time; has reduced mixing complexity, and possesses less sensitivity to variations in material temperature than previous compositions. This composition can be heat initiated to begin polymerization at any time up to the end of the working time and attains a minimum average flexural strength of greater than 500 psi 1 hour after placement. Several promising concepts were briefly explored in addition to the inorganic latent catalyst approach. The inorganic latent catalyst approach was unable to achieve cure through exotherm propagation at the lower temperatures using a flame-point initiation. Flame-point initiation consists of heating a portion of the repair surface with an open flame and allowing the exotherm to carry the polymerization (cure) throughout the polymer concrete. Due to the failure of this approach, a more conventional active acid blend with a freezing point below 5 deg F was used as a catalyst at the lower temperatures.