Geotextile reinforcement techniques have been widely used in paving works around the world and have proven to be effective in improving pavement performance. This study has focused on using different positions and numbers of geotextile reinforcement sheets between the layers of flexible pavement for rutting reduction. Fitting depth was measured in the field at seven constructed sections of the pavement of the road model. Each section has been strengthened with different reinforcement approaches. All road sections were subjected to a maximum load repetition of 10,000 cycles. The results indicate that using three layers of geotextile beneath each course of the designed road pavement sections (surface, binder, and base) reduced rutting by 96%. Traffic benefit ratio (TBR) has been employed in this study to reveal the behavior of geotextile reinforcement in increasing the service life of the road. TBR values are the load cycling ratio between the reinforced and unreinforced section for the exact recorded rut depth, it has been found to be minimally equal to 4 for the case of using one layer of reinforcement at interface I, and that value keeps growing up for other reinforcement cases.

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Nano materials are being used in concrete technology to enhance the sustainability of performance grade for the pavement construction. In this paper, test investigations are conducted to study the addition effect of nanoparticles combination (Al2O3, SiO2) with the average diameter of 20 nm and with different acceptable percentages (Al2O3 : 0% and SiO2 : 0 %), (Al2O3 : 0.5% and SiO2 : 0.5 %), (Al2O3 : 0.5% and SiO2 : 1 %), (Al2O3 : 0.5% and SiO2 : 1.5 %), (Al2O3 : 1% and SiO2 : 0.5 %), (Al2O3 : 1.5% and SiO2 : 0.5 %) and (Al2O3 : 1% and SiO2 : 1 %) by weight of cement on the mechanical properties (compressive strength, flexural strength and modulus of elasticity) and the thickness design of concrete pavement. The optimal combination which contributed to the highest values of mechanical properties at (28) days in order to maintain the workability requirement of nano concrete mixes was found (Al2O3 : 1% and SiO2 : 0.5 %) which associated with the decrement in concrete pavement thickness, when all other factors were held constant. It is concluded that cement modification with nano particles (combination of SiO2 and Al2O3) increased compressive strength, flexural strength and modulus of elasticity though decreased concrete pavement thickness.

Nano materials are being used in concrete technology to enhance performance grade sustainably of construction field works like rigid highway pavement. Nano materials like Nano Al2O3 are used as admixture for the cementitious materials to improve the mechanical and durability properties related to the physio-chemical reactions. The overall objective of this research is to evaluate the effects of Nano Al2O3 addition on the abrasion durability response of concrete pavement. These investigations are conducted to study different Nano Al2O3 contents (0.5, 1, 1.5, 2%) by weight of cement on the concrete strength and abrasion resistance by using the manufactured calibrated rotary cutter device for evaluation process and microstructure analysis by Scanning Electronic Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) tests. The compressive strength was tested at 28 days of curing and the results showed that the compressive strength of concrete increases up to 36% at 28 days by addition of 1% nano-alumina as a replacement of cement; Optimal content (1% by weight of cement) is found that appears better abrasion, durability abrasion performance and at the same time, achieves the main requirement of concrete highway pavement (strength and workability).

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