engleski

Cold mix recycling procedure during execution of asphalt pavement structure base courses - Croatian case study

During the past few years in the Republic of Croatia the pavement rehabilitation executed by the application of the “in place” cold recycling procedure has been applied on several national, county and local roads. The “in place” cold recycling was executed by addition of binder, of foamed bitumen or of cement mixed with certain additives. The Paper presents results of field testing and additional laboratory testing of samples of the course stabilised with cement and the additive named “X” for the purpose of this Paper. The results of laboratory testing of 24-hour and 28-day compressive and tensile strength are presented of the prepared mixtures of recycled material of the pavement structure with addition of pure cement, of cement mixed with 2% of “X” additive and of cement mixed with 4% of the same additive, as well as the results of testing of frost and thaw resistance. The values of modulus of elasticity were determined on the 28-day old samples. The analysis of the results of additional laboratory testing yields conclusions which indicate the necessity of further investigation of the impact the addition of “X” additive to cement has on the physical-mechanical properties of the recycled material.

pavement rehabilitation; asphalt pavement; “in place” cold recycling; modulus of elasticity

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