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To address the need for expedient repair solutions for paved runways in cold environments, airfield damage repair Rapid Airfield Damage Recovery (RADR) materials were tested at temperatures down to -40 oF. New materials and methods were developed to fill the identified performance gaps for conventional RADR materials. Simulated crater repairs were performed at -20 and -40 oF. Folded fiber glass panels and hinges met the published tensile strength, but did not meet the required flexural strength. Fiberglass-reinforced polyester panels retained their 73 oF tensile and flexural strengths down to -40 oF. If required, foreign object debris covers can be used at temperatures below freezing, but further experimentation is needed to fully assess matting candidates at temperatures below 0 oF. Geocell sidewalls and junctions showed an increased maximum force, with a ten-fold decrease in the displacement before failure. Rapid setting flowable fill and polyurethane foam, prepared conventionally, were demonstrated as backfill materials at temperatures as low as 0 oF. As a cap material, Rapid Set® concrete can be placed using conventional techniques down to 17 oF. Snow and ice materials were demonstrated as backfill materials below freezing and met the strength requirements for capping applications at temperatures down to -40 oF. DISCLAIMER: The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. All product names and trademarks cited are the property of their respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents. DESTROY THIS REPORT WHEN NO LONGER NEEDED. DO NOT RETURN IT TO THE ORIGINATOR. ERDC/CRREL TR-19-2 iii

Evaluation of airfield damage repair methods for extreme cold temperatures