BEHAVIOUR OF PAVEMENT QUALITY CONCRETE WITH RECLAIMED ASPHALT PAVEMENT AGGREGATES (original) (raw)
Related papers
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...
FEASIBILITY STUDY OF RAP AS AGGREGATES IN CEMENT CONCRETE
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 flexural strength of concrete 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 Kanmangla flyover, Bangalore. And it is checked for the effective utilization in Concrete. RAP aggregates are replaced with Natural Aggregates by 50% and 25% and evaluated.
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.
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.
Effect of Reclaimed Asphalt Pavement Aggregate on Hardened Properties of Concrete
IJRASET, 2021
This paper purpose of study is to find the properties of Reclaimed asphalt pavement (RAP) and compare the same with the concrete produced with natural aggregates. This thesis presents a study conducted on mechanical and durability properties of Reclaimed asphalt pavement (RAP) aggregates concrete. The investigation covered concrete mixes at water cementitious material with ratio of 0.4. Ordinary Portland cement of 43-grade was used in this study. The percentage of Reclaimed asphalt pavement (RAP) aggregates that partially replaced natural aggregates by weight were 0%, 25%, 50%, 75%, and 100% with glass fiber The results show that the optimum replacement of Reclaimed asphalt pavement (RAP) with natural aggregate then gain strength of concrete compare with normal mix. It is observed that compressive and tensile strength of concrete gain upto with mix 50% NA+50%RAPA+1%SF after that increase percentage of RAP with decrease both strength compare with normal mix.
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.
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.
Production of recycled concrete aggregates (RCA) from construction and demolition (C&D) waste has become popular all over the world since the availability of land spaces are limited to dispose. Therefore it is important to seek alternative applications for RCA. The use of RCA in base and sub-base layers in granular pavement is a viable solution. In mechanistic pavement design, rutting (permanent deformation) is considered as the major failure mechanisms of the pavement. The rutting is the accumulation of permanent deformation of pavement layers caused by the repetitive vehicle load. In Queensland, Australia, it is accepted to have the maximum of 20% of reclaimed asphalt pavement (RAP) in RCA and therefore, it is important to investigate the effect of RAP on the permanent deformation properties of RCA. In this study, a series of repeated load triaxial (RLT) tests were conducted on RCA blended with different percentage of RAP to investigate the permanent deformation and resilient modulus properties of RCA. The vertical deformation and resilient modulus values were used to determine the response of RCA for the cyclic loading under standard pressure and loading conditions.
IRJET, 2020
There is a Basic shortage of normal aggregates and hence the use of demolished building material as Recycled coarse aggregate (RCA) is on demand. Using the demolished building material as recycled coarse aggregate helps in saving normal aggregates, reduces the load on landfills, decreases energy consumption and can provide cost savings. RCA comprises of crushed, graded inorganic pieces processed from the materials that has been used in the construction and demolition debris. This aggregate contains impurities like crushed clay bricks, crushed ceramic material and gypsum. In this paper, stress analysis using different softwares is being reviewed to understand the possibility of its effectiveness. Different softwares like Ansys, Kenpave, are helpful in analysis of both stress and deflection values with high accuracy.
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...