Mechanical Property of Asphalt Pavement Recycling with Using Prototype Asphalt Plant Reduction Scale

Abstract

The hot recycled asphalt mixtures, can fit among alternative materials for working with very hard asphalt and gains feedstock with environmentally friendly and inexpensive. One of the main problems to be solved in practical activities of recycling asphalt concrete is the need for frequent addition of a new stone aggregates the milled material framework for obtaining grain size of asphalt mixture obtained (recycled). This paper presents the mechanical behavior of recycled asphalt mixtures in the laboratory determined first and later in the field, using a small-scale prototype plant, hot machining. This is a new equipment in reduction scale that the type is circular mixer containing heating plates at the bottom, and called J1000, which details are given in the paper. A laboratory study and field study was developed about the asphalt concrete dosage that containing asphalt pavement recycling, asphaltic cement (AC) of polymer, lime and grinded tire rubber, without the addition of new stone material. Two results of the mix dosage are presented and the first being obtained in the laboratory and the other obtained in the prototype asphalt plant in reduction scale, and it contains aggregates usually used to pavement construction in Três Rios city, RJ/Brazil. The results of the asphalt binder characterization and the short time aging using drying oven RTFOT, the recycled mix grading, tensile strength and resilience modulus. It shown that the prototype asphalt plant in reduction scale is able to produce recycled asphalt mixture with satisfactory quality, and can be used in tropical countries.