Feasibility of local mixing plan using the country's potential resources for durability and sustainable development (case study - Mashhad airport apron)

Document Type : Original Research

10.22034/24.4.7
Abstract
Today, most of the existing pavements in the country are asphalt pavements. This is due to the abundance of oil in the country and the lack of a suitable alternative for it. Asphalt pavements, despite their popularity and ease of implementation, also have disadvantages. The low service life of asphalt pavements and the exorbitant costs that are paid for their maintenance, as well as the damages caused in some special areas of the pavement, such as airport runways, require the use of pavements that can have many characteristics. It is better than asphalt paving to meet the needs of these areas. In recent years, the use of concrete pavement compared to asphalt pavement has had a higher economic justification. Also, in some cases, the use of concrete pavement, such as airport runways, which must have high resistance to pressure, impact, and wear, is the only viable option. But concrete pavement also has disadvantages such as low durability against freezing and thawing cycles in cold regions. Therefore, it is necessary to take into account the necessary measures to increase the durability of concrete, compensate for the disadvantages of concrete pavements against destructive factors and increase their service life to a significant amount, so that it is economically justified compared to asphalt procedures. The indigenous concrete mixing plan is a new approach that has been considered as an economic solution for the sustainable development of many civil infrastructures in the world. For this purpose, in this article, a practical and effective method to increase the efficiency and life of concrete pavements of Mashhad Airport by using potential mineral resources and also to minimize maintenance costs has been introduced. In this study, 8 concrete mixing plans were prepared with aggregates from two local quarries, Mehrizi and Rezaei, in relation to Mashhad airport, and then the mechanical properties and durability behavior of all mixtures were carried out to provide the optimal local mixing plan. The results showed that by adding polypropylene fibers to the samples containing microsilica, the bending strength of the concrete samples increased up to 8.7 MPa. Based on the results, concrete samples containing Mehrizi aggregates showed better performance in terms of mechanical behavior and durability compared to concretes made from Rezai mine aggregates. Also, among the mixtures of Mehrizi mine, the mixing design containing polypropylene fibers and 7% replacement of microsilica with cement showed far higher resistance and durability than other samples. In such a way that the rate of improvement in compressive strength, resistance to chlorine ion invasion, melting and ice phenomenon and silica alkali reactions compared to the control sample after the end of each of the aforementioned tests is 22.81%, 418%, 400% respectively. % and 189.31%. Therefore, based on the mentioned results, a local mixing plan using Mahden Mehrizi materials is suggested for use in the apron of Mashhad airport.


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Modares Civil Engineering journal
Volume 24, Issue 4
September and October 2024
Pages 7-20