De Beer, MorrisVan Rensburg, YvetteKomba, Julius J2014-10-302014-10-302014-07De Beer, M., Van Rensburg, Y. and Komba, J.J. 2014. Crushing damage estimation for pavement with lightly cementitious bases. In: 33rd Southern African Transport Conference (SATC 2014), CSIR International Convention Centre, Pretoria, South Africa, July 2014http://hdl.handle.net/10204/775233rd Southern African Transport Conference (SATC 2014), CSIR International Convention Centre, Pretoria, South Africa, July 2014Crushing (or compression) failure and associated surface deformation of lightly cementitious (stabilised) materials used for base/sub-base course layers in pavements has been well established in the South African pavement design practice since the 1990s. Typically, crushing failure starts at the surface of the cementitious base layer, and could extend to 50 mm deep, depending on tyre load/stress conditions. Recently developed crushing damage relationships for 2, 5, 10, 15 and 20 mm level of deformation (“rut”) were proposed for practical application on these pavements. The aim of this paper is the practical application of these relationships for an un-surfaced and surfaced pavement with a typical stabilised (C3 – quality) base layer. Currently there are up to 15 standard pavement designs with cementitious base layers proposed in TRH 4 (1996). This paper demonstrates the impact of four different tyre models (including overloading) used in the mechanistic-empirical design of these pavements. In particular, the importance of adequate surface protection is demonstrated with reference to the vertical tyre contact stresses expected on these cementitious layers. The impact of the findings extends to the use (or not) of C3 - quality bases and associated surfacings on all categories of pavements carrying up to 10 million E80s. This is considered important towards the upgrading of secondary (or alternative) road pavements using cementitious stabilisers in the base layer, especially in the light of the potential future attraction of heavily loaded vehicles - with or without overloading on the tyres.enPavement cementitious basesSurface protectionRoad infrastructureHeavily loaded vehiclesConference PresentationDe Beer, M., Van Rensburg, Y., & Komba, J. J. (2014). Crushing damage estimation for pavement with lightly cementitious bases. SATC 2014. http://hdl.handle.net/10204/7752De Beer, Morris, Yvette Van Rensburg, and Julius J Komba. "Crushing damage estimation for pavement with lightly cementitious bases." (2014): http://hdl.handle.net/10204/7752De Beer M, Van Rensburg Y, Komba JJ, Crushing damage estimation for pavement with lightly cementitious bases; SATC 2014; 2014. http://hdl.handle.net/10204/7752 .TY - Conference Presentation AU - De Beer, Morris AU - Van Rensburg, Yvette AU - Komba, Julius J AB - Crushing (or compression) failure and associated surface deformation of lightly cementitious (stabilised) materials used for base/sub-base course layers in pavements has been well established in the South African pavement design practice since the 1990s. Typically, crushing failure starts at the surface of the cementitious base layer, and could extend to 50 mm deep, depending on tyre load/stress conditions. Recently developed crushing damage relationships for 2, 5, 10, 15 and 20 mm level of deformation (“rut”) were proposed for practical application on these pavements. The aim of this paper is the practical application of these relationships for an un-surfaced and surfaced pavement with a typical stabilised (C3 – quality) base layer. Currently there are up to 15 standard pavement designs with cementitious base layers proposed in TRH 4 (1996). This paper demonstrates the impact of four different tyre models (including overloading) used in the mechanistic-empirical design of these pavements. In particular, the importance of adequate surface protection is demonstrated with reference to the vertical tyre contact stresses expected on these cementitious layers. The impact of the findings extends to the use (or not) of C3 - quality bases and associated surfacings on all categories of pavements carrying up to 10 million E80s. This is considered important towards the upgrading of secondary (or alternative) road pavements using cementitious stabilisers in the base layer, especially in the light of the potential future attraction of heavily loaded vehicles - with or without overloading on the tyres. DA - 2014-07 DB - ResearchSpace DP - CSIR KW - Pavement cementitious bases KW - Surface protection KW - Road infrastructure KW - Heavily loaded vehicles LK - https://researchspace.csir.co.za PY - 2014 T1 - Crushing damage estimation for pavement with lightly cementitious bases TI - Crushing damage estimation for pavement with lightly cementitious bases UR - http://hdl.handle.net/10204/7752 ER -