CIVE 405

Posted: August 27th, 2021

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CIVE 405

A Short Summary of the Main Points

Singh and co-authors discuss why a majority of road and building constructions utilize the use of rigid pavements over flexible ones. In particular, they affirmed that Reclaimed Asphalt Pavement (RAP) aggregate concrete is mostly favored over the natural aggregates. Nonetheless, they have also attributed this to the unavailability of these materials and insufficient fundsas the major reasons why many roads and buildings use natural concrete aggregates(Singh, Rasinchung, and Kumar 735). Apart from that, the authors have suggested the application of RAP inclusive concrete even though they contain asphalt film, which lowers the properties of this type of concrete material. Furthermore, they advocate for the use of Abrasion and Attrition (AB&AT) since it improves the concrete quality of RAP by washing out the contaminant layers of dust and further perforating the asphalt film. They have conducted experimental research that tests the effects of incorporating Dirty RAP, Washed RAP, AB&AT Treated RAP on the mechanical and durability quality of concrete (Singh, Rasinchung, and Kumar 737). Thus, while the results of the study showed that the integration of RAP aggregates mix improved the workability and cohesiveness of concrete, the use of AB&AT treatment mix signified the highly increased mechanical quality of RAP concrete.

A Brief Description of the Mentioned Tradeoffs

Whereas the natural concrete exhibited the highest aggregate impact value, its aggregate counterpart mix of DRAP, WRAP, and AB&AT showed aggregate crushing value. Moreover, the Loss Anges Abrasion value was low in RAP aggregates than that of natural concrete. Lastly, there were trade-offs in density and air void content in a way that the natural concrete showed a higher air void content but low density (Singh, Rasinchung, and Kumar 741). Consequently, the RAP aggregates indicated a high-density value but a low content of the air.

Works Cited

Singh, Surender, G. D. Rasinchung, and P. Kumar. An Economical Processing Technique to Improve RAP Inclusive Concrete Properties. Construction and Building Materials, (2017): vol. 148, pp. 734-747.