Composite Pavement Systems, Volume 1: HMA/PCC Composite Pavements (2013) / Chapter Skim
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Pages 14-20
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14 This R21 project, "Composite Pavement Systems," focused on providing strong, durable, safe, smooth, and quiet pavements needing minimal maintenance. Two strategies have shown great promise: (1)
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15 composite pavements. Each volume includes six chapters.
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16 Study (Von Quintus et al.
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17 The Netherlands has built porous HMA over recently placed CRC on a number of major projects during the past 13 years. These projects are all performing very well with very low noise levels and no reflection cracking from the CRC despite their relatively thin HMA layer of about 2 to 3 in.
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18 cracking is caused by horizontal and or differential vertical movements between different layers at a discontinuity in the underlying PCC layer. Thus, the jointing or cracking of the underlying PCC slab is one factor that is critical to reflection cracking, with shorter spaced joints and cracks minimizing the extent and severity of reflection cracking.
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19 Because the PCC layer is the primary load-carrying component of the HMA/PCC composite pavement system, the material properties of the PCC layer (along with thickness and joint spacing) affect the structural capacity of the composite pavements.
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20 Use of hMa/pCC Composite pavements A key question that often is asked with regard to HMA/PCC composite pavements is "Where will composite pavements be used, and what will be the demand? " HMA/PCC composite pavements allow the pavement designer to design pavements using the best qualities of both HMA and PCC pavements to produce a more functional and economical structure that generally is more cost-effective in terms of service throughout its life.
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