Investigating the Effect of Using Recycled Materials in Highway Construction (original) (raw)
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Usability of Marble Waste as a Road Base Material, Case Study of Bilecik Province
Proceedings Article, 2021
As a result of the constantly increasing needs, developments in technology and industry cause an increase in waste. With the increase of wastes, it has become necessary to recycle wastes in order to reduce the environmental problems that arise. For this purpose, many sectors try to minimize the expenses during the manufacturing stages, energy consumption, raw material, and space usage as much as possible. In the construction industry, where raw material consumption is the highest, the most consumed raw material is aggregate. Approximately 95% of the materials used in road constructions consist of aggregate, and the aggregate used is obtained from the quarries. The need for aggregate quarries is increasing day by day and the general structure of the earth is partially deformed. In this context, the wastes generated in the marble quarries of Bilecik province were evaluated as road base material according to the Turkey Highways Technical Specification (TKTŞ). Laboratory experiments def...
USE OF MARBLE WASTE AS A ROAD BASE MATERIAL IN DIFFERENT SIZE RANGES
Along with the economic loss caused by the non-use of waste worldwide, uncontrolled storage also brings an additional cost. Today, the rapid increase in the population and the rapid depletion of natural resources in nature lead us to research the recycling possibilities of waste materials. In this context, using marble waste in road pavements is one of the best areas of use. This study investigated the suitability of substituting the marble waste obtained from a marble quarry in Bilecik, Turkey, in the road base layer instead of the aggregate, which was used all the time in the base layer in highway construction at different intervals. The physical tests carried out in this context have met the base material limit conditions of the Turkish Highways Technical Specification (THTS). Mixtures obtained in modified Proctor experiments, and optimum water contents (w opt) and maximum dry unit volume weight (rdmax) were determined for each mixture. California bearing ratio (CBR) values remained above the limit value of all mixtures for 0 days and 7 days of curing according to the specifications for THTS. In addition, CBR values were obtained after freezing-thawing at 4, 12, and 20 cycle numbers. According to the freezethaw test results, there was an increase in CBR values in the first 4 cycles and a decrease in the following cycles. Still, all the test results obtained remained Nazile Ural, Ahmet Neim Kahveci Use of Marble Waste as a Road Base Material in Different Size Ranges above the limit value according to the specifications for THTS. Aggregate unit cost constitutes approximately twice the unit cost of marble waste. Besides, this difference has created an economic equality distance of 18.9 km. Therefore, a marble quarry, a road construction site within the calculated economic equality distance and marble waste material will provide a financial gain for our country. With the evaluation of quarry waste all over the world, we can leave a liveable world with rich raw material resources and a strong economy for future generations.
2020
1Research scholar, M. Tech, Department of Civil Engineering, Jagannath University Jaipur, Rajasthan, India 2Assistant professor, Department of Civil Engineering, Jagannath University Jaipur, Rajasthan, India 3Professor & Head, Department of Civil Engineering, Jagannath University Jaipur, Rajasthan, India ---------------------------------------------------------------------***---------------------------------------------------------------------Abstract – In the Roads and Highway construction the granular course layer such as GSB (Granular Sub Base) and WMM (Wet mix macadam) are the most important layer. With the use of these layers in Flexible Payment Road a stable surface can be formed. The constructions of roads consume natural valuable resources like aggregate which is costlier. The use of recycled aggregate instead of virgin aggregate helps in reducing the demand of extraction. If a new Road is formed over the existing road or if bridge is constructed over the existing road due t...
Concrete is the 2nd most largest used resource after water and its massive production is posing a threat to the environment, where protection of environment and sustainability are the most debated topics in the current scenario. This calls for the reduction in the consumption of natural raw materials and alternatively increase in the consumption of waste materials. Concrete recycling is gaining importance as it decreased the load on production as well as disposal by using the demolition waste as a source of new concrete or other applications. Major advantages of Recycling include the conservation of the use of natural aggregate and prevention of the need of non-recyclable land filling of materials, and thus the associated environmental costs of exploitation is decreased. By removing both the waste disposal and new material production needs, transportation requirements for the project are significantly reduced. [1]In addition to the resource management aspect, recycled concrete aggregates absorb a large amount of carbon dioxide from the surrounding environment. The natural process of carbonation occurs in all concrete from the surface inward. In the process of crushing concrete to create recycled concrete aggregates, areas of the concrete that have not carbonated are exposed to atmospheric carbon dioxide. Crushed concrete can be used as new concrete for pavements, shoulders, median barriers, sidewalks, curbs and gutters, and bridge foundations structural grade concrete soil-cement pavement bases lean-concrete and bituminous concrete. In order find the suitability of aggregates for road construction, various tests like Los Angeles abrasion test, aggregate impact test, slump test and concrete block compressibility test were performed .This paper presents the summary of the tests which have to be performed to check the suitability of aggregates for construction of roads along with a brief note of other applications and benefits of RCA. The results of this study can be used in determining the materials that can be used in pavement design and construction.
Laboratory evaluation of recycled construction and demolition waste for pavements
The wide production of construction and demolition waste and its illegal deposition are serious current problems in Brazil. This research proposes to evaluate the feasibility of using aggregate from recycled construction and demolition waste (RCDW) in pavement applications. A laboratory program was conducted by geotechnical characterization, bearing capacity and repeated load triaxial tests. The results show that the composition and the compactive effort influence on the physical characteristics of the RCDW aggregate. The compaction process has promoted a partial crushing and breakage of RCDW particles , changing the grain-size distribution and increasing the percentage of cubic grains. This physical change contributes to a better densification of the RCDW aggregate and consequently an improvement in bearing capacity, resilient modulus and resistance to permanent deformation. The results have shown that the RCDW aggregate may be utilized as coarse base and sub-base layer for low-volume roads.
Utilization of Waste Materials in Pavement Construction
We would like to brief the project in which we are working. Nowadays, quantity of plastic waste, municipal solid waste, unuseful tires are increasing due to increase in population, urbanization, development activities and change in lifestyle. This waste is disposed by land filling and incineration, which are hazardous and not ecofriendly. On the other hand, plastic bottles, waste polymers, cups, waste tires can be reuse by powdering or blending it with crushers and can be coated over aggregate or mixed with bitumen by heating process. Polymer and crumb rubber can be use as a binder with respect to aggregate and bitumen in construction of flexible pavement. The various tests can be conduct during this study on aggregate i.e. crushing value, impact value, abrasion value, specific gravity and also on bitumen i.e. penetration value, ductility, softening point, etc. obtained results can be give rise to better quality roads and utilization of waste materials in pavement construction.
Materials science appraisal of recycled construction materials for roadways
2007
This work investigates the variability in particle size distribution of sixty samples of demolition waste produced by different primary crushing processes. The demolition waste consisted of mainly concrete, clay bricks and clinker (breeze) blocks with concrete forming most of the waste. The results indicate that the particle size distribution curves are consistently wellgraded, not significantly variable and similar to British specification for subbase Type 1 material in spite of the variable nature of the demolition waste and the unsophisticated primary crushing processes (compared to quarry processes). With good control during the demolition and primary crushing processes consistent demolition waste can be produced. The work forms part of an overall research investigation to assess the load-bearing and durability characteristics of demolition wastes for use in road pavements.
Application of Recycled Materials in Highway Projects
2010
The impetus and pressure for pavement and geotechnical engineers to incorporate sustainability in engineering projects has led to a rise in the reuse of materials such as recycled concrete aggregate (RCA), reclaimed asphalt pavement (RAP) and recycled glass (RG) as fill and in pavement sub-layers. Consequently, an understanding of their behavior and characteristics are necessary prior to use in practice. Tests to characterize the materials, to assess their compactability and to address the vulnerability of RCA to tufa formation and aluminum corrosion were performed. It was found that RCA from a mechanical viewpoint has superior strength and stiffness. However, when exposed to water, it has a tendency to hydrate. Initially, the hydration leads to a gain in strength and stiffness. Subsequently, the material is prone to shrinkage cracking. Nevertheless, the RCA stiffness and strength are still quite appreciable compared to the pre-cracked value. RCA made with Hawaiian basaltic aggregat...
Use of MARBLE's WASTE IN ASPHALT MIXTUREs
The International Conference on Civil and Architecture Engineering, 2010
In this study the use of marble dust, marble limestone and crushed marble collected during the shaping process of marble blocks has been investigated in the asphalt mixtures as filler material, limestone and sand. Six different asphalt mixes having marble dust, limestone dust filler, crushed marble, sand, limestone aggregate and marble aggregate were prepared. The optimum binder content was then determined by Marshall test procedures. The study showed that marble's wastes, which are in the dust form and crushed form could be used as filler material and sand in asphalt mixtures where they are available. This may reduce the cost of transportation compared to that when using ordinary paving materials.