Impact of Airport Pavement Deicing Products on Aircraft and Airfield Infrastructure (2008) / Chapter Skim
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Pages 25-34
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From page 25... ...
, lighting fixtures, signage, and other infrastructure assets; the lifespan and design and material changes of these were also CHAPTER FOUR EFFECTS OF PAVEMENT DEICING PRODUCTS ON AIRFIELD INFRASTRUCTURE
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From page 26... ...
However, some responses provided more specific information regarding impacts on concrete and asphalt pavements as well as on other airfield infrastructure. IMPACT OF PAVEMENT DEICING PRODUCTS ON CONCRETE PAVEMENT This section synthesizes the information on the impact of PDPs on concrete pavement.
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From page 27... ...
Nature of the Effect of Modern Pavement Deicing Products on Portland Cement Concrete Pavement Deterioration Limited existing laboratory studies indicated that alkali-metalsalt-based deicers could cause or accelerate ASR distress in the surface of PCC pavement by increasing the pH of concrete pore solution. PCC pavements that were otherwise resistant to ASR might show rapid deterioration when exposed to these high alkali solutions.
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From page 28... ...
and the cement hydration products, or to the accelerating effect of these cations on the alkali-carbonate reaction if the concrete contained reactive dolomite aggregates. Standards and Test Protocols The U.S.
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Another IPRF project that recently underwent a request for proposals is Project 01-G-00206-5, Role of Dirty Aggregates in the Performance of Concrete Exposed to Airfield Pavement Deicer, which will examine the possibility of increased alkali content on dirty aggregates and its role in concrete durability in the presence of PDPs. IMPACT OF PAVEMENT DEICING PRODUCTS ON ASPHALT PAVEMENT This section will synthesize the information on the impact of PDPs on asphalt pavement.
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From page 30... ...
Concurrent to the use of acetate/formate-based deicers in the 1990s, asphalt pavement in Europe saw an increase in pavement durability problems. At some Nordic airports, these 30 problems emerged as degradation and disintegration of asphalt pavement, softening of asphalt binders, and stripping of asphalt mixes occurring together with loose aggregates on the runways (Nilsson 2003; Pan et al.
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From page 31... ...
Asphalt emulsification also occurred in a NaF aqueous solution and more detailed laboratory testing is being conducted. The effects of NaAc on asphalt mixes were examined by conducting a modified ASTM D 3625-96 Boiling Water Test, which was originally designed to test the susceptibility of asphalt mixes to moisture damage, by accelerating the effect of water on bituminous-coated aggregate with boiling water.
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From page 32... ...
Standards and Test Protocols There are two existing Swedish test methods related to asphalt and deicers: the LFV Method 1-98, Bituminous Binders, Storage in De-icing Fluid, and the LFV Method 2-98, Effect of De-icing Fluid on the Surface Tensile Strength of Asphalt Concrete for Airfields -- Adhesion Test. In 2006, results of round-robin testing of LFV Method 2-98 by seven laboratories were presented; however, the information was only available in the form of Microsoft PowerPoint Slides and thus difficult to follow.
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From page 33... ...
Advances in technologies related to PDPs and asphalt pavement will make both understanding their interaction and developing an appropriate compatibility test protocol a continued effort. IMPACT OF PAVEMENT DEICING PRODUCTS ON OTHER AIRFIELD INFRASTRUCTURE Other airfield infrastructure that comes into contact with PDPs includes ground support equipment (GSE)
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