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Field investigations of the crack pattern in porous asphalt—Continuously Reinforced Concrete Pavements in The Netherlands
Published in Sandra Erkens, Xueyan Liu, Kumar Anupam, Yiqiu Tan, Functional Pavement Design, 2016
D. Ren, L.J.M. Houben, Wilfred Nijssen, Ron van der Aa, Berwich Sluer
Continuously reinforced concrete pavement (CRCP) with porous asphalt (PA) wearing course have been built on several major roads in the Netherlands since 1990: A76, in the very south-east of the country, 1990, A12, south of Utrecht, 1998; A5, near Amsterdam Airport Schiphol, 1999–2003; A50, Eindhoven, 2004–2005; and A73, between Venlo and Echt-Susteren, 2007. This type of AC/CRCP composite pavement provides low noise and good friction, as well as reduced splash and spray. The expected lifetime for the PA wearing course is 8 to 10 years but the overall PA/CRCP system is assumed to be a ‘perpetual’ pavement, where only the surface layer needs to be replaced over time when needed. In general, those AC/CRCP pavement sections are in good condition without severe distresses, rutting, or ravelling in the PA wearing course after more than 8 years in service. However, there are few minor to medium transverse reflective cracks in the PA wearing course in several sections, and some wide reflective cracks require maintenance during its service period. There are several reflective crack models available for the asphalt concrete layer over Portland cement concrete (PCC) or CRCP slab (Jayawickrama & Lytton 1987; Owusu-Antwi et al. 1999; Lytton et al. 2010). Reflective cracking in composite AC overlay of PCC pavement is considered as the result of the horizontal and vertical movements at the joints in the underlying PCC pavement caused by temperature cycles and traffic loading. However, those models are limited to an asphalt overlay over an old concrete pavement, and none of them is suitable for the Netherlands conditions, where PA is placed over the newly constructed CRCP slab as the development of the crack pattern in CRCP is influenced by the thermal insulated effect of the PA wearing course (Khazanovich et al. 2013). As most of the PA wearing courses in those PA/CRCP motorways in the Netherlands are approaching their design life, it provides a good opportunity to study the mechanism of reflective crack development in the PA/CRCP pavement type. This paper presents the results of the crack pattern of the underlying CRCP slab and its influences on the occurrence of reflective cracking in the PA wearing course though field investigations on three PA/CRCP motorways, A5, A50 and A73 in the Netherlands. The risk of punchout development and horizontal cracking in the CRCP slab, and the effect of polymer modified PA mixtures to reduce reflective cracking are also discussed.
Investigation the influences of geotextile on reducing the thermal reflective cracking using XFEM
Published in International Journal of Pavement Engineering, 2018
Jianming Ling, Zefeng Tao, Jinsong Qian, Wei Fu
Various researchers have been proposed for anti-reflective crack measurement, which can be categorised into three types: improving the performance of asphalt concrete, placing stress-absorbing layer and using pavement material with better anti-crack characteristic (Zhou and Sun 1996). Geosynthetic material to improve the performance of asphalt concrete is an effective method concerned by researchers.