Use of Recycled Concrete as Unbound Base Aggregate in Airfield and Highway Pavements to Enhance Sustainability

Saeed, Athar; Hammons, Michael I.

doi:10.1061/41005(329)43

Cited by 7 publications

(4 citation statements)

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“…The concrete waste can also be used as an aggregate in new concrete materials to replace virgin aggregates, as has been under investigation for the several decades, primarily for highway rigid pavements [1][2][3]. There have been fewer studies of using RCA for airfield rigid pavements, either as a support material [4,5], which has been the most common, or as a replacement of virgin aggregate in concrete [6][7][8]. In order to minimize adverse impact to aircraft operation and performance, one primary requirement of utilizing RCA in new airfield concrete is that it would not significantly affect the concrete strength, shrinkage, and surface properties.…”

Section: Introductionmentioning

confidence: 99%

Initial moisture and mixing effects on higher quality recycled coarse aggregate concrete

Brand

Roesler

Salas

2015

Construction and Building Materials

129

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Section: Introductionmentioning

confidence: 99%

Initial moisture and mixing effects on higher quality recycled coarse aggregate concrete

Brand

Roesler

Salas

2015

Construction and Building Materials

129

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“…that RCA meets or exceeds the minimum structural design criteria for base layers (4)(5)(6) and pavement systems (7)(8)(9). Nevertheless, there are issues with using RCA that must be considered.…”

mentioning

confidence: 99%

Performance of Continuously Reinforced Concrete Pavement Containing Recycled Concrete Aggregates

Roesler

Huntley

Amirkhanian

2011

Transportation Research Record: Journal of the Transportation R

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Between 1986 and 1987, the Illinois Department of Transportation constructed a section of 10-in. continuously reinforced concrete pavement (CRCP) containing recycled concrete aggregate on I-57 near Effingham, Illinois. Functional and structural data, including falling weight deflectometer tests, visual distress surveys, surface profiles, and skid numbers were collected periodically throughout the service life of the pavement. Falling weight deflectometer results indicated that the pavement section exhibited excellent load carrying, with an average load transfer efficiency greater than 90% across the transverse cracks. The prominent distress was longitudinal cracking, which appeared over the reinforcement bars in all lanes. This abnormal cracking pattern had been noted for many years and had been attributed to problems with the original tube feeding process. The section developed a significant amount of localized distresses and patches over its last 5 years as a result of further deterioration of the longitudinal cracking. A petrographic examination concluded that no deleterious alkali–silica reaction had occurred in the pavement and that the air void system had been normal. The mean transverse crack spacing was approximately 1.5 ft, which was significantly shorter than normal CRCP and was attributed to the greater drying shrinkage potential of recycled concrete aggregate. Functionally, the pavement showed good skid resistance and fair-to-good ride quality. The overall performance of this CRCP section exceeded the performance of roughly 50% of the 10-in. CRCP within Illinois in terms of age and 25% in terms of traffic. In June 2010, this CRCP section was overlaid with 3.5 in. of asphalt concrete.

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“…While it has been shown that the partial or total replacement of natural coarse aggregates by RA coarse to produce an RC has a positive effect on environmental impact [ 53 , 54 ], this also causes an increase in the porosity of the RC produced [ 21 ], which has repercussions in terms of durability.…”

Section: Introductionmentioning

confidence: 99%

Metamorphosis in the Porosity of Recycled Concretes Through the Use of a Recycled Polyethylene Terephthalate (PET) Additive. Correlations between the Porous Network and Concrete Properties

et al. 2017

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In the field of construction, sustainable building materials are currently undergoing a process of technological development. This study aims to contribute to understanding the behavior of the fundamental properties of concretes prepared with recycled coarse aggregates that incorporate a polyethylene terephthalate (PET)-based additive in their matrix (produced by synthesis and glycolysis of recycled PET bottles) in an attempt to reduce their high porosity. Techniques to measure the gas adsorption, water porosity, Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) were used to evaluate the effect of the additive on the physical, mechanical and microstructural properties of these concretes. Porosity reductions of up to 30.60% are achieved with the addition of 1%, 3%, 4%, 5%, 7% and 9% of the additive, defining a new state in the behavioral model of the additive (the overdosage point) in the concrete matrix; in addition, the porous network of these concretes and their correlation with other physical and mechanical properties are also explained.

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Use of Recycled Concrete as Unbound Base Aggregate in Airfield and Highway Pavements to Enhance Sustainability

Cited by 7 publications

References 0 publications

Initial moisture and mixing effects on higher quality recycled coarse aggregate concrete

Initial moisture and mixing effects on higher quality recycled coarse aggregate concrete

Performance of Continuously Reinforced Concrete Pavement Containing Recycled Concrete Aggregates

Metamorphosis in the Porosity of Recycled Concretes Through the Use of a Recycled Polyethylene Terephthalate (PET) Additive. Correlations between the Porous Network and Concrete Properties

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