Comparative analysis of asphalt concrete mixtures employing pebbles and synthetic coarse aggregate of calcined clay in the Amazon region

Campelo, Nilton de Souza; Campos, Arlene Maria Lamêgo da Silva; Aragão, Aroldo Figueiredo

doi:10.1080/10298436.2017.1309199

Cited by 6 publications

(7 citation statements)

References 3 publications

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“…Other authors have also reported satisfactory behavior of different types of treated clays in asphalt mixtures (Al Allam et al 2016, Mohd-Satar et al, 2018. These include clays previously stabilized with lime and then used in asphalt mixtures (Alizadeh and Modarres, 2019), synthetic coarse aggregate of calcined clay (SCACC) manufactured at high temperatures and used to replace the coarse fraction of asphalt mixtures (Lopes da Silva et al, 2015;De Souza Campelo et al, 2017Losa et al, 2008), and waste bleaching clays from the food industry used as filler in asphalt mixtures (Sangiorgi et al 2014(Sangiorgi et al , 2016. The last material did not have the typical properties of clay minerals.…”

Section: Sumáriomentioning

confidence: 98%

Behavior of thermally treated kaolin filler in an asphalt concrete mixture

Marín-García

Quintana

Jiménez-Jiménez

2019

RLCT

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Section: Sumáriomentioning

confidence: 98%

Behavior of thermally treated kaolin filler in an asphalt concrete mixture

Marín-García

Quintana

Jiménez-Jiménez

2019

RLCT

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“…Campelo et al [23] studied SCACC because it is an alternative material that offers a competitive price in relation to the conventional aggregate (crushed stone or pebble), in addition to the fact that the raw material is a várzea clay, which is an abundant Natural and synthetic aggregate characterization tests [23].…”

Section: Synthetic Coarse Aggregate Of Calcined Clay (Scacc) In Road ...mentioning

confidence: 99%

“…Deposits of commercial rocky materials are limited to regions outside the Amazon Sedimentary Basin. Therefore, the coarse aggregate (crushed stone or pebble) is an input that makes paving services more expensive, given the large distances it needs to cover [23,24]. Figure 8 shows the locations of the pebble extraction and crushed stone exploration areas in the state of Amazonas.…”

Section: Introductionmentioning

confidence: 99%

Challenges in the Construction of Highways in the Brazilian Amazonia Environment: Part I – Identification of Engineering Problems

Campelo¹,

Campos²,

Baia³

et al. 2022

Applied Methods in Design and Construction of Bridges, Highways and Roads - Theory and Practice

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The construction of highways in the Brazilian Amazonia Region is always problematic, mainly because it involves environmental obstacles but also technical, economic, and natural challenges. The environmental issues concern the deforestation of the virgin forest and the resulting environmental impacts. The technical ones are related to the natural subgrade, formed by the geologically young alluvial soils that are plastic, being highly compressible or expansive, present in the vast Amazon Basin, whereas the economic issues refer to the final costs of inputs for the construction of the layers of the highway since granular soils and stony materials are located in limited areas that are distant from the work sites, given the geographic immensity of the Brazilian Amazonia. There is also the cost of purging low-bearing capacity soil from the natural subgrade of the highway. Added to all this are the issues of nature, which involve high annual rainfall and the hydrological regime of river flooding and ebbing, which induce the saturation of the pavement layers and the loss of the global geotechnical stability of the compacted earth embankment, respectively. This work points out the Engineering difficulties to be faced in road infrastructure works in the Brazilian Amazon.

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“…The experimental procedures were defined as follows, for each mixture [33]: (i) determination of the AC working temperatures from Saybolt-Furol viscosity test in the range of 85 ± 10 and 140 ± 15 SSF for mixing and compaction, respectively; (ii) the components (aggregates + AC) were mixed at a temperature of 146°C for approximately 2 min; (iii) the mix was placed in the Marshall mould and compacted mechanically with 75 blows on each side of the specimen; (iv) the specimen were left at rest for 24 h at room temperature; (v) after that, the specimens were left in a water bath at 60°C for 2 h; (vi) finally, they were placed in the compression mould and submitted to compression in order to determine the rupture load and flow value. Thus, all physical and mechanical parameters of HMAC mixtures were determined by the Marshall method.…”

Section: Production Of Sma Samples In the Laboratorymentioning

confidence: 99%

Use of Waste Foundry Sand (WFS) as Filler in Hot-Mixed Asphalt Concrete

Campelo¹,

Costa²,

Vieira³

et al. 2020

Sandy Materials in Civil Engineering - Usage and Management

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The environmental issue has become a topic of relevant discussion in modern society, given the current awareness that construction inputs are finite, and a large amount of waste can be reused as a building material in engineering works. The products used in foundry industry can be non ferrous and ferrous and the residue produced by this last one is not potentially hazardous to human health. The waste foundry sand (WFS) fits this reuse and can be employed in asphalt mixtures, in partial or complete replacement of the conventional filler, i.e. Portland cement (PC). In this sense, this work analyses five asphalt mixtures, one using 100% CP (reference mixture) as filler, and the other four using WFS in proportions of 25-100%, every 25% of the total amount, in 5% (in mass) of the maximum replacement. The mixtures were physically and mechanically characterised according to the Marshall methodology and subsequently submitted to the tests of static indirect tensile strength (static ITS), resilient modulus (RM), repeated-load indirect fatigue (fatigue life) and unconfined static creep. The results of the tests showed that all mixtures with WFS residue presented physical and mechanical parameters within Brazilian standards following the Marshall methodology.

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Comparative analysis of asphalt concrete mixtures employing pebbles and synthetic coarse aggregate of calcined clay in the Amazon region

Cited by 6 publications

References 3 publications

Behavior of thermally treated kaolin filler in an asphalt concrete mixture

Behavior of thermally treated kaolin filler in an asphalt concrete mixture

Challenges in the Construction of Highways in the Brazilian Amazonia Environment: Part I – Identification of Engineering Problems

Use of Waste Foundry Sand (WFS) as Filler in Hot-Mixed Asphalt Concrete

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