Netterberg, FDe Beer, Morris2012-08-012012-08-012012-04Netterberg, F. and De Beer, M. 2012. Weak interlayers in flexible and semi-flexible road pavements: Part 1. Journal of the South African Institution of Civil Engineering, vol. 54(1), pp 33-421021-2019http://www.scielo.org.za/pdf/jsaice/v54n1/04.pdfhttp://hdl.handle.net/10204/6029Copyright: 2012 South African Institution of Civil EngineeringWeak layers, interlayers, laminations and/or interfaces in the upper structural layers of road pavements are specifically prohibited in most road-building specifications. However, such layers are extremely common and often lead to premature pavement distress. In Part 1 of this two-part set of papers, it is shown that from experience with heavy vehicle simulator (HVS) and dynamic cone penetrometer (DCP) testing, the presence of such layers and/or conditions at any depth in the structural layers of a flexible or semi-flexible pavement is far more deleterious thanis commonly appreciated. In Part 2 the effects of these weak layers are further modelled and discussed using various examples based an HVS testing and mechanistic pavement analyses. In particular, a weak upper base course of a cemented pavement under a thin bituminous surfacing may lead to severe surfacing (and upper base) failure within a matter of weeks to months after opening to traffic, not excluding failure even during construction. In this paper (Part 1), the causes of weak layers, interlayers, laminations and/or interfaces, together with simple methods for their detection during construction and analyses of their effects on the structural capacity of flexible and semi-rigid (cemented) road pavements, are briefly discussed.enPavement designRoad pavementsHeavy vehicle simulatorHVSCivil engineeringArticleNetterberg, F., & De Beer, M. (2012). Weak interlayers in flexible and semi-flexible road pavements: Part 1. http://hdl.handle.net/10204/6029Netterberg, F, and Morris De Beer "Weak interlayers in flexible and semi-flexible road pavements: Part 1." (2012) http://hdl.handle.net/10204/6029Netterberg F, De Beer M. Weak interlayers in flexible and semi-flexible road pavements: Part 1. 2012; http://hdl.handle.net/10204/6029.TY - Article AU - Netterberg, F AU - De Beer, Morris AB - Weak layers, interlayers, laminations and/or interfaces in the upper structural layers of road pavements are specifically prohibited in most road-building specifications. However, such layers are extremely common and often lead to premature pavement distress. In Part 1 of this two-part set of papers, it is shown that from experience with heavy vehicle simulator (HVS) and dynamic cone penetrometer (DCP) testing, the presence of such layers and/or conditions at any depth in the structural layers of a flexible or semi-flexible pavement is far more deleterious thanis commonly appreciated. In Part 2 the effects of these weak layers are further modelled and discussed using various examples based an HVS testing and mechanistic pavement analyses. In particular, a weak upper base course of a cemented pavement under a thin bituminous surfacing may lead to severe surfacing (and upper base) failure within a matter of weeks to months after opening to traffic, not excluding failure even during construction. In this paper (Part 1), the causes of weak layers, interlayers, laminations and/or interfaces, together with simple methods for their detection during construction and analyses of their effects on the structural capacity of flexible and semi-rigid (cemented) road pavements, are briefly discussed. DA - 2012-04 DB - ResearchSpace DP - CSIR KW - Pavement design KW - Road pavements KW - Heavy vehicle simulator KW - HVS KW - Civil engineering LK - https://researchspace.csir.co.za PY - 2012 SM - 1021-2019 T1 - Weak interlayers in flexible and semi-flexible road pavements: Part 1 TI - Weak interlayers in flexible and semi-flexible road pavements: Part 1 UR - http://hdl.handle.net/10204/6029 ER -