Effect of Active Filler Ratio on Indirect Tensile Strenght of Foam Bituminous Mixtures
Abstract
Highway pavement consruction has been one of the most important raw material comsuming area in the construction industry, which has been cousing huge amount of environmental demages and rapid diminish of raw material resources.
In order to increase the usage rates of cold recycled pavement materials in road construction works, mixing with bitumen and hydraulic binders have often been used for some time in the pavement construction. These additional materials are; with the contribution they make to the performance of the mixes, they increase the usage rates of the recycled materials, thereby enabling the increase of environmental and economic advantages.
In this study conducted to investigate the effects of foam bitumen and three different types of active filler material (cement, hydrated lime, fly ash) from these additives on cold recycled mixtures, different bitumen percentages with 70 / 100-100 / 150-160 / 220 grade penetration bitumen productions were used for. Different percentages of active filler materials were used in the productions. Thus, the roles of variables such as bitumen grade, bitumen percentage, active filler type and percentage were evaluated in the mixture.
As evaluation criteria, ITSDRY (dry indirect tensile strenght), ITSWET (wet indirect tensile strenght), TSR (tensile strenght retain) and flow parameters were used.
Data obtained as a result of the experimental study; the use of cement from active filler products and increasing the percentage of cement in the mixture, using bitumen with high penetration as a bitumen and reducing the percentage in the mixture showed that the mixtures had a positive effect on ITS values. However, the decrease in the bitumen percentage and the increase in the cement percentage have reduced the flow values of the material.
Keywords
Active filler, indirect tensile strenght, foam bitumen
Project Number
KGM-ARGE/2017-1, 4939-D1-17
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