Weak interlayers in flexible and semi-flexible road pavements: Part 1
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...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
South African Institution of Civil Engineering
2012-04-01
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| Series: | Journal of the South African Institution of Civil Engineers |
| Subjects: | |
| Online Access: | http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S1021-20192012000100004 |
| _version_ | 1827847875722215424 |
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| author | F Netterberg M de Beer |
| author_facet | F Netterberg M de Beer |
| author_sort | F Netterberg |
| collection | DOAJ |
| description | 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 than is 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. |
| first_indexed | 2024-03-12T09:37:46Z |
| format | Article |
| id | doaj.art-0723a0714ab5404f99e56e97a24aca54 |
| institution | Directory Open Access Journal |
| issn | 1021-2019 |
| language | English |
| last_indexed | 2024-03-12T09:37:46Z |
| publishDate | 2012-04-01 |
| publisher | South African Institution of Civil Engineering |
| record_format | Article |
| series | Journal of the South African Institution of Civil Engineers |
| spelling | doaj.art-0723a0714ab5404f99e56e97a24aca542023-09-02T13:29:30ZengSouth African Institution of Civil EngineeringJournal of the South African Institution of Civil Engineers1021-20192012-04-015413142Weak interlayers in flexible and semi-flexible road pavements: Part 1F NetterbergM de BeerWeak 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 than is 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.http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S1021-20192012000100004weak layersinterlayersdetectionpavementstabilised |
| spellingShingle | F Netterberg M de Beer Weak interlayers in flexible and semi-flexible road pavements: Part 1 Journal of the South African Institution of Civil Engineers weak layers interlayers detection pavement stabilised |
| title | Weak interlayers in flexible and semi-flexible road pavements: Part 1 |
| title_full | Weak interlayers in flexible and semi-flexible road pavements: Part 1 |
| title_fullStr | Weak interlayers in flexible and semi-flexible road pavements: Part 1 |
| title_full_unstemmed | Weak interlayers in flexible and semi-flexible road pavements: Part 1 |
| title_short | Weak interlayers in flexible and semi-flexible road pavements: Part 1 |
| title_sort | weak interlayers in flexible and semi flexible road pavements part 1 |
| topic | weak layers interlayers detection pavement stabilised |
| url | http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S1021-20192012000100004 |
| work_keys_str_mv | AT fnetterberg weakinterlayersinflexibleandsemiflexibleroadpavementspart1 AT mdebeer weakinterlayersinflexibleandsemiflexibleroadpavementspart1 |