Development of a semi-flexible heavy duty pavement surfacing incorporating recycled and waste aggregates – Preliminary study

Afonso, Márcia Lopes; Dinis-Almeida, Marisa; Oliveira, Luiz António Pereira de; Castro-Gomes, João; Zoorob, Salah E.

doi:10.1016/j.conbuildmat.2015.10.165

Cited by 89 publications

(33 citation statements)

References 17 publications

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“…Thus different innovative and eco-friendly materials are now available on the market and a number of second-hand materials are studied, being the step of physical and mechanical characterization necessary to assess their real benefits Sangiorgi et al, 2014;Alfonso et al 2016).…”

Section: Introduction and Scopementioning

confidence: 99%

A laboratory and filed evaluation of Cold Recycled Mixture for base layer entirely made with Reclaimed Asphalt Pavement

Sangiorgi

Tataranni

Simone

et al. 2017

Construction and Building Materials

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Asphalt concrete (AC) recycling is probably the most cost-effective technique for the rehabilitation of stressed road pavements and for the construction of new ones. The increased interest in this technology comes from the need of reducing the costs connected to the production processes and to the use of virgin raw materials. In fact, the benefits connected to the use of Reclaimed Asphalt Pavement (RAP) are related to the possibility of substituting the natural aggregates and the virgin binder of an AC mixture, without negatively affecting its mechanical properties. When this process is made at ambient temperature (Cold Recycled Mixes-CRM), more advantages are brought about with, above all, the reduction in energy consumption and emissions during in plant production and laying, in addition to the actual possibility of achieving durable pavement layers. A CRM totally made of RAP is proposed in this research, the main goal of which was to evaluate the different physical and mechanical characteristics derived by the large use of recycled materials. According to the final mix-design, CRM does not show significant differences in terms of physical properties, when compared to a Hot Mix Asphalt (HMA) for base layers. Moreover, even if the experimental mixture *Manuscript Click here to view linked References

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Section: Introduction and Scopementioning

confidence: 99%

A laboratory and filed evaluation of Cold Recycled Mixture for base layer entirely made with Reclaimed Asphalt Pavement

Sangiorgi

Tataranni

Simone

et al. 2017

Construction and Building Materials

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“…Fly ash, ground granulated blast furnace slag, mild glass, Panasqueira waste mud, geopolymeric grouts and crosslinked polymer resin have been used as a cement replacement in the grouts to investigate the physical and mechanical performance of cementitious grouts for semi-flexible pavements. All these additives exhibit positive impacts on fluidity and strength properties of cementitious grouts [5,[12][13][14][15]. The effect of rubberized based cement grouts has also shown advantages in terms of reduced shrinkage, higher freeze thaw resistance, reduced tyre-pavement noise pollution, but unfortunately this is accompanied by a reduction in mechanical properties [16].…”

Section: Admixtures By-products and Other Supplementary Materialsmentioning

confidence: 99%

Effect of Irradiated and Non-Irradiated Waste PET Based Cementitious Grouts on Flexural Strength of Semi-Flexible Pavement

et al. 2019

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In this study the effect of irradiated and non-irradiated waste polyethylene terephthalate (PET) as replacement of cement and fly-ash in ordinary Portland cement (OPC) and geopolymeric cement (GPC) based cementitious grouts on flexural strength of semi-flexible pavement specimens were evaluated. The porous asphalt gradation was selected based on Malaysian specifications for semi-flexible pavements with a target of 30% air voids. The cement content in the OPC grouts and the fly-ash content in the GPC based grouts were partially replaced with 1.25% PET (using both irradiated and non-irradiated PET). Beam specimens were prepared and tested for flexural strength properties using center point loading configuration. The grouts modified with recycled waste plastic (PET) showed approximately the same results as obtained from the control specimens. Although the replacement amount was low (1.25% by weight of cement), nonetheless, significant impact on reducing CO2 emissions is expected when preparing grouts for mass construction of semi-flexible pavement surfaces. Similarly, effective recycling of waste plastics in road construction and replacing OPC with plastic and geopolymers will have a positive effect on the environment and will furthermore contribute to sustainable pavement construction.

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“…Figure 2 shows the geometry of the flow cone used in this study. In the previous study [14] the flow time of the flow cone with a capacity of 1,200 mL and an internal orifice diameter of 10 mm was measured from 11 to 20 seconds. Lei [15] reported that, for the cone with a capacity of 1,000 mL and an internal orifice diameter of 10 mm, flow time was proposed to be in the range of 8 to 10 seconds.…”

Section: Fluiditymentioning

confidence: 99%

“…Since the cement grout plays an important role in filling the pores of the open graded asphalt mixture to form a semirigid pavement, it should have sufficient fluidity to fill the pores. Afonso et al [14] reported a flow time of 11 s to 20 s for a cone with a capacity of 1,200 mL and an internal orifice diameter of 10 mm. Lei has proposed a cone with a capacity of 1,000 mL and an internal orifice diameter of 10 mm within a range of 8 s to 10 s. Because the flow time differed according to the cone size in the previous study, the flow value in this current study was able to be used for relative comparisons of cement grout mixtures.…”

Section: Fluiditymentioning

confidence: 99%

Development of a Semirigid Pavement Incorporating Ultrarapid Hardening Cement and Chemical Admixtures for Cement Grouts

Bang¹,

Lee²,

Kim

2017

Advances in Materials Science and Engineering

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Mechanical tests were carried out to evaluate the influence and effects of fluidity and compressive strength of cement grout on semirigid asphalt pavement. An open graded asphalt skeleton was designed in order to achieve target porosity in the range of 18∼22%. In addition, four types of cement grout mixtures were produced with varying mix proportions with ultrarapid hardening cement and chemical admixtures, that is, accelerating and retarding agents. For the semirigid pavement specimens, mechanical experiments to measure properties such as porosity, flexural strength, Marshall stability, and wheel tracking resistance were carried out. The test results demonstrated that the flow time (fluidity) of cement grout is the most significant factor that determines the mechanical properties of semirigid asphalt specimens under constant condition of the open graded asphalt skeleton. For the semirigid pavement mixing proportion in the current study, it is recommended that the porosity of the open graded asphalt skeleton and flow time of cement grout should be 20% and within 12 seconds, respectively.

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Development of a semi-flexible heavy duty pavement surfacing incorporating recycled and waste aggregates – Preliminary study

Cited by 89 publications

References 17 publications

A laboratory and filed evaluation of Cold Recycled Mixture for base layer entirely made with Reclaimed Asphalt Pavement

A laboratory and filed evaluation of Cold Recycled Mixture for base layer entirely made with Reclaimed Asphalt Pavement

Effect of Irradiated and Non-Irradiated Waste PET Based Cementitious Grouts on Flexural Strength of Semi-Flexible Pavement

Development of a Semirigid Pavement Incorporating Ultrarapid Hardening Cement and Chemical Admixtures for Cement Grouts

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