关键词: |
RUNWAYS, DENSITY, QUICK REACTION, STRUCTURAL PROPERTIES, FLY ASH, CEMENTS, REPAIR, FLEXURAL STRENGTH, COLD WAR, AIR FORCE FACILITIES, COMPRESSIVE STRENGTH. |
摘要: |
The paper first gives definition and historical perspective to the problem of Rapid Runway Repair (RPR). The differences in Cold War and post-Cold War RRR needs are also discussed. CeraTech, Inc.'s PaveMend(TradeMark) is presented as a good solution for post-Cold War RRR needs, which are speed of the repair and durability of the repair. The homogeneous nature of PaveMend(TradeMark) is illustrated by a photomicrograph, and the ability of PaveMend(TradeMark) to be engineered to match the material to be repaired is discussed as a desirable quality. A manufacturer's specification sheet with independent, third-party lab results is presented, which illustrates the ability of PaveMend(TradeMark) to mimic the properties of a typical runway which might need RRR in the post-Cold War era. Different formulations of PaveMend(TradeMark) are briefly discussed, but the paper focuses on the "RRR formulation" of PaveMend(TradeMark), which utilizes fly ash, a pozzolan, as its reactive material. Differences- between pozzolans and Portland cement are discussed, highlighting those properties which have a positive impact on the durability of repairs. Results from preliminary testing by the Air Force Research Laboratory (ARFL) is presented, which includes density measurements, as well as time histories of heat of hydration, compressive strength, flexural strength, sonic modulus of elasticity, and bonding strength. in addition, a successful field demonstration of PaveMend(TradeMark) as a RRR material is briefly described. (Disclaimer. While this paper presents results from testing of PaveMend(TradeMark) by the Air Force Research Laboratory (AFRL), any conclusions or opinions-offered herein are attributable to the authors, and should not be construed as an official endorsement of PaveMend(TradeMark) by the U.S. Air Force or by AFRL.) |