Effect of Reclaimed Asphalt Pavement Aggregate on Hardened Properties of Concrete (original) (raw)
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A DETAILED STUDY ON RECLAIMED ASPHALT PAVEMENT IN PAVEMENT QUALITY CEMENT CONCRETE
RAP (reclaimed asphalt pavement) produced from the reconstruction of asphalt road pavements is one of the alternative material proposed. Rap can be used as an alternative material for both fine and coarse aggregate, it is conventionally used as coarse aggregate in asphalt pavement. In this experimental study, Performance of Pavement Quality Cement Concrete(PQCC) is studied when virgin aggregates are replaced by RAP by conducting experimental study in laboratory and also performing numerical analysis on RAP concrete model cube by using ANSYS to find out stress value at different percentage of RAP and age of concrete under loading. Fine aggregate is replaced with RAP by 0%, 15%, 30%, 45%, 60% and Coarse aggregate with RAP by 0%, 15%, 30%, 45%, and 60%.Experimental results are validated with numerical results. It is observed that RAP will reduce the performance of concrete and affects mechanical properties of concrete like compressive and flexural strength, density on increasing the percentage in concrete. But for 15 % replacement, RAP concrete has fulfilled the requirements of M30 concrete and for 30%replacement compressive strength of concrete is 28.456 N/mm² which is very near to the minimum strength value of M30 concrete. For all mix proportion of concrete flexural strength is more than minimum required strength of M30 concrete. The results indicated that RAP can be used as an aggregate in PQCC up to limited percentage.
BEHAVIOUR OF PAVEMENT QUALITY CONCRETE WITH RECLAIMED ASPHALT PAVEMENT AGGREGATES
Concrete is the basic material in all construction works and coarse aggregates constitute more than 50% of the mix. But the procurement and generation of natural aggregates is getting difficult day by day because of lack of natural source and environmental effects. In search of alternative for natural aggregates, lead to the usage of Reclaimed Asphalt Pavement aggregates, which are produced abundantly due to replacement of Flexible Pavements with Rigid Pavements in India. This study is taken up to determine the variation of different properties of strength and mainly durability of concrete pavements with natural aggregates and RAP aggregates. The cubes will be casted and tested for Strength and Flexural Strength is also determined by casting beams. The results can be analyzed to identify the importance of RAP aggregates for its effective and efficient usage for present scenario of India. The RAP Aggregates are procured from NICE, Bangalore. And it is checked for the effective utilization in Concrete Pavements. RAP aggregates are replaced with Natural Aggregates by 100%, 75%, 50% and 25% and evaluated. Also the fatigue models are developed by testing the beams under repeated loadings by considering stress ratio of 65%, 75% and 85%.
International Journal for Research in Applied Science & Engineering Technology, 2020
The inappropriate use of Reclaimed Asphalt Pavement (RAP) leads to deterioration of environment and waste of money. Research studies show that RAP can be reused helping in sustaining environment along with saving a huge amount of budget. This study circulates around using RAP as a replacement of coarse aggregate in Concrete and then investigating RAP-Concrete under different temperatures. The mix design of concrete was done for 4000 psi. Concrete specimens were tested for physical as well as mechanical properties. Results showed that all the properties decrease with the increase in the replacement level of RAP in concrete specimens.
The Journal of Engineering Research [TJER]
The use of Reclaimed Asphalt Pavement (RAP) aggregates in rigid pavements instead of conventional aggregates in Himalayan regions solves the problem associated with shrinking natural resources and dumping of wastes. This study studied the effect of partial replacement of conventional coarse aggregates by RAP in Dry Lean Concrete (DLC) mixes suitable for rigid pavements. A total of 114 specimens (cubical and cylindrical) were cast and tested for mechanical and durability properties as per ASTM and IS code guidelines, partially replaced with CRAP by 25%, 50%, and 75% by weight. The simultaneous effect of fly ash addition by partial replacement of cement by it was also studied. The study concludes that 25% partial replacement by CRAP with 10% fly ash as partial replacement of cement led to the achievement of the strength benchmark as mandated by IRC SP 44 (2014). It was also observed that durability properties such as resistance to acid attack, sulphate attack and carbonation also impr...
Use of Reclaimed Asphalt Pavement (RAP) in Concrete in Perspective of Rigid Pavements
2023
The demolishing of roads for repair and reconstruction produces an ample amount of Recycled Asphalt Pavement (RAP) which, if not utilized, may cause depletion of aggregate sources and pollution. The use of RAP in the plain cement concrete (PCC) is sustainable use of road waste material. However, the potential of incorporating RAP to replace natural aggregate needs to evaluate. This research targets the evaluation of mechanical properties of PCC made with extracted RAP materials through laboratory experiments and to achieve the optimized replacement of natural aggregate for rigid pavement composite design. The Virgin Coarse Aggregate (VCA) in PCC was replaced with RAP at 0:25:100 percent by weight. Results show that incorporating RAP in PCC causes a gradual decrease in mechanical properties. However, the decrease in compressive strength is more (57%) than the flexural and splitting tensile strength. RAP up to 25% was found as an optimum allowable replacement with VCA in the rigid pavement. From the Modulus Of Elasticity (MOE), it was detected that with the incorporation of RAP the ductility of PCC improved slightly.
Proceedings of the 11th Asia Pacific Transportation and the Environment Conference (APTE 2018), 2019
Reclaimed Asphalt Pavement (RAP) is a paving stripping material with Cold Milling Machine. The RAP accumulation in East Java Province is estimated 50,000 m 3 per-year. The RAP usage can decrease RAP accumulation, natural material, damage rate by mining or excavation. RAP mixture produced an optimum performances (workability, stability). RAP improved volumetric and mechanical properties of mixture. On the other hand, the usage of RAP increased the brittleness of pavement. It is necessary to support in microstructural aspect so the addition of RAP can produce better performance. The objective of this study is to obtain physical and mechanical properties of asphalt concrete contain RAP. Method used literature study. The result showed the physical properties of aggregate and asphalt RAP according the specification standard exception on gradation, penetration and ductility. The Asphalt Concrete with RAP include in specification standard, exception was in the range of 3.78-4.63%, the optimum in VIM PRD. The asphalt content in RAP RAP of 20-30%. RAP can be used as AC-WC, AC-BC, AC-Base. The strength of RAP depends on the source of RAP. The usage of RAP requires new or other material so it become the environment friendly material.
Performance of Recycled Asphalt Pavement as Coarse Aggregate in Concrete
Recycled asphalt pavement (RAP) is the reclaimed and reprocessed pavement material containing asphalt and aggregate. Most RAP is recycled back into pavements, and as a result there is a general lack of data pertaining to the mechanical properties for RAP in other possible applications such as Portland cement concrete. In the present study, some mechanical properties of Portland cement concrete containing RAP as coarse aggregate were investigated in the laboratory. Six concrete mixes of widely differing water/cement ratios and mix proportions were made using RAP as coarse aggregate. The properties tested include the physical properties of the RAP aggregate, the compressive and flexural strengths of the concrete. These properties were compared with those of similar concretes made with natural gravel aggregate. Results of the tests suggest that the strength of concrete made from RAP is dependent on the bond strength of the asphalt-mortar (asphalt binder-sand-filler matrix) coatings o...
Utilization of Reclaimed Asphalt Pavement Materials in Rigid Pavement
International Journal of Engineering Research and
Concrete has proven to be a suitable and crucial material in construction and it also has been successfully implemented in numerous projects. Demand for concrete for construction is on the increase and at the same time, there is a shortage of natural aggregates in many areas. Today it has become really difficult to obtain natural aggregates for concrete locally. Bringing aggregate from faraway places increases the cost of concrete. Hence a real and urgent need to consider using satisfactory alternative aggregate materials. On the other hand, already a huge amount of industrial waste are generated around the world such as fly ash, blast furnace slag etc. Most of these industrial wastes are not effectively used, and a large part of reclaimed asphalt pavements (RAP) material are removed for reconstruction, resurfacing are disposed of in landfills. As the demand of power and amenities increases, the volume of these wastes would increase against this background, RAP concrete has begun to gain significant consideration from the research scholar and construction practitioners, because of its advantageous in using industrial by-product to replace cement and RAP aggregate replace natural aggregate.
Use of Reclaimed Asphalt Pavement (RAP) in Rigid Road Pavements
International Journal for Research in Applied Science and Engineering Technology -IJRASET, 2020
The production of Reclaimed Asphalt Pavement (RAP) has been increasing nowadays. Pakistan has almost 100,000 kilometers of road networks and almost 30% of RAP can be produced from it. This research aims at using RAP as an aggregate in rigid pavements. The RAP was replaced as an aggregate with virgin coarse aggregate (VCA) by the ratio 0 & 50 respectively. The mix design was done for 4000psi. Concrete specimen were casted which were tested initially for slump, temperature and unit weight for fresh concrete. Later, after 28 days curing some of the hardened concrete specimen were tested for compression and splitting tensile under the UTM machine. Flexural Test was done on beams on UTM. While, modulus of adaptability was resolved with the help of data logger using UCAM programming. The outcome displayed that the compressive ,flexural and separating inflexibility lessened with the extension in RAP. Modulus of elasticity graphs showed that while the stressed decreased with increase in RAP, the ductility showed slight improvement.
Laboratory investigation of portland cement concrete containing recycled asphalt pavements
Cement and Concrete Research, 2005
Recycled asphalt pavement (RAP) is the removed and/or reprocessed pavement material containing asphalt and aggregate. The use of RAP in asphalt pavement has become a common practice in the construction of new, and reconstruction of old, hot mix asphalt (HMA) pavements. But little research has been done to examine the potential of incorporating RAP into concrete. Since RAP contains asphalt, it is very likely that the toughness of concrete made with RAP could be improved. In the present study, the mechanical properties of RAPincorporated Portland cement concrete were investigated through laboratory experiments. Two types of RAP (coarse and fine RAP) materials were considered. The results from this study indicated that RAP could be incorporated into Portland cement concrete without any modification to the conventional equipment or procedures. Without any treatment, there was a systematic reduction in the compressive and split tensile strengths with the incorporation RAP in concrete. Notably, the energy absorbing toughness for the RAP incorporated concrete has been significantly improved.