Details:

Creators:
Mukhopadhyay, Anol ; Shi, Xijun
Mukhopadhyay, Anol ; Shi, Xijun Less -
Corporate Creators:
Texas A&M Transportation Institute
Corporate Contributors:
Texas. Dept. of Transportation. Research and Technology Implementation Office
Subject/TRT Terms:
[+]
Aggregate Mixtures Performance Measurement Portland Cement Concrete Reclaimed Asphalt Pavements
Publication/ Report Number:
0-6855-1
Resource Type:
Tech Report
Geographical Coverage:
United States ; Texas
United States ; Texas Less -
OCLC Number:
990340744
Corporate Publisher:
Texas A&M Transportation Institute
Abstract:
The increasing maintenance and rehabilitation actions lead to considerable amounts of reclaimed asphalt pavement

(RAP) left in stockpiles in the United States. The possible use of RAP in Portland cement concrete (PCC) as aggregate

replacement not only would help dispose of excess RAP stockpiles, but also provide a reduction in virgin aggregate

consumption in PCC, which brings significant benefits from both economic and environmental standpoints. In this

project, the previous findings on the mechanical properties and durability of RAP-PCC reported in the literature were

validated. The microstructures and crack propagation in the RAP-PCC system were investigated through several

advanced techniques such as optical microscope, x-ray CT, and scanning electron microscope. Performance evaluation

of RAP-PCC slab by using pavement performance software and the life cycle assessment models were also conducted.

Finally, the guidelines and implementation plan were provided in order to facilitate the use of PCC containing RAP in

the field. The major conclusions from this project are 1) The coarse RAP with suitable gradation containing sufficient

intermediate size particles can help make dense graded concrete. The dense graded RAP-PCC showed better

workability and mechanical properties compared to the other gap graded RAP-PCC. 2) The major weak point of the

RAP-PCC system is the asphalt. Asphalt cohesive failure (i.e., crack easily propagate through the asphalt layer around

the RAP particles) is the major failure mechanism. 3) Compared with the material production for plain PCC pavement,

the production of materials for constructing RAP-PCC pavements (either full-depth or two-lift) was more economical

and consumed less amounts of energy. It released less amounts of air pollutants, greenhouse gases, and toxic materials.

It also led to less land use and water withdrawals and 4) The idea of using RAP-PCC as the bottom lift in a two-lift

PCC pavement can maximize the RAP usage without compromising the pavement performance or compromise within

the permissible limits.


Format:
PDF
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:b3baa8e512b1ac20d3ac94d9d4be0302c0a6589c59cdc9ba195efcd681c3a622
Download URL:
https://rosap.ntl.bts.gov/view/dot/32373/dot_32373_DS1.pdf
File Type:

Supporting Files

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