Guidance for Usage of Permeable Pavement at Airports (2017) / Chapter Skim
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Pages 45-55
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From page 45... ...
45 5.1 Overview Proper pavement design and materials selection are crucial to the durability and life-cycle performance of permeable pavements because they provide proactive defense against potential risks related to poor drainage, nondurable permeable pavement (such as due to raveling)
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From page 46... ...
46 Guidance for Usage of permeable pavement at airports 5.3 Base/Subbase Reservoir Aggregate The base/subbase reservoir layer serves to retain stormwater and to support the permeable surface layer in accommodating traffic loads. Aggregates should be clean and uniformly graded.
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From page 47... ...
Materials Considerations 47 PICP also incorporates a bedding layer for uniform placement of the units. This material is typically of an ASTM No.
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From page 48... ...
48 Guidance for Usage of permeable pavement at airports Porous asphalt maximum aggregate size for the surface courses is typically ½ to ¾ in. Although they are no longer included in FAA's construction standards, for comparative purposes, FAA Item P-402, Porous Friction Course, provides aggregate gradations for ½ and ¾ in.
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From page 49... ...
Materials Considerations 49 Cellulose or mineral fibers are additional possible additives, which are generally added at 0.3% to 0.4% content, respectively, by total mass of mix (ASCE 2015)
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From page 50... ...
50 Guidance for Usage of permeable pavement at airports draindown in an uncompacted asphalt mixture sample when the sample is held at elevated temperatures comparable to those encountered during the production, storage, transport, and placement of the mixture. The test is particularly applicable to mixtures such as porous asphalt and stone matrix asphalt.
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From page 51... ...
Materials Considerations 51 can also be used. Total cementitious material content commonly ranges from 450 to 550 lbs/yd3 (NRMCA [National Ready Mixed Concrete Association]
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From page 52... ...
52 Guidance for Usage of permeable pavement at airports that the paste fully coats and adheres to the aggregates and allows the open structure to be connected with adequate strength and permeability. The aggregate moisture level must be carefully monitored since the water absorbed by the aggregate and excess moisture accompanied with the aggregate largely affects the final performance of the permeable concrete.
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From page 53... ...
Materials Considerations 53 This specification provides guidelines for physical requirements, sampling and testing, visual inspection, and rejection of specimens. • ASTM C979, Specification for Pigments for Integrally Colored Concrete: Specification covers the requirements for colored and white pigments in powder form to be used as admixtures for producing integrally colored concrete.
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From page 54... ...
54 Guidance for Usage of permeable pavement at airports 5.8 Specifications 5.8.1 Industry Groups Two ACI publications, ACI Standard 522.1-13 (Specification for Pervious Concrete Pavement) and ACI Report 522R-10 (Report on Pervious Concrete)
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From page 55... ...
Materials Considerations 55 These industry references focus on vehicular applications. The IPRF report, Stabilized and Drainable Base for Rigid Pavement (Hall et al.
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