Composite Pavement Systems, Volume 2: PCC/PCC Composite Pavements (2013) / Chapter Skim
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Pages 96-102
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96 Introduction Although the construction of the PCC/PCC composite pavement requires an additional paver and careful planning to ensure the production and placement of two PCC mixes, the process of construction itself does not use technologies and equipment that are not already available in the United States. The key steps in the construction include • Prepare the sublayers (including subgrade, subbase, and base courses)
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97 Place the Lower PCC Layer The lower PCC layer can be paved following the same procedures and guidelines for PCC/PCC composite pavements as for conventional JPCP or CRCP (Figure 5.2)
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98 baskets or reinforcing steel. The vibrators should be higher than the top of the dowel basket assembly (or reinforcing steel)
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99 logistical constraints, the upper PCC is placed over the lower PCC using a belt placer (Figure 5.4)
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100 should be sprayed immediately after finishing, the compound application should be uniform, and the compound application should be sufficiently thick. If the finishing is uneven, the later texturing efforts can be compromised: areas of lighter compound application will result in less surface paste removed than will areas with the heavier application.
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101 brushed with the hand broom instead of coming off as individual particles or (2) the shearing of the sweeping action of the broom dislodges aggregates.
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102 Diamond Grinding Texture If specified, the upper lift PCC can be diamond ground after it has cured sufficiently. Agency specifications for diamond grinding of conventional JPCP or CRCP can be used, and no changes are necessary.
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