: Avaliação da resistência à tração da mistura solo-cimento Portland-RoadCem®

Figueiredo, Paulo Victor de Carvalho; Barbosa, Cláudia Ávila; Frota, Consuelo Alves da

doi:10.36229/978-85-7042-164-7.cap.09

Cited by 1 publication

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The accumulation of cracks caused by shrinkage can accelerate the damage to the pavement, the erosion processes, and the reduction of the strength and durability of the base layer. Conversely, the addition of synthetic zeolite (ZS) additive, together with cement, for in situ soil transformation modifies the cement hydration process on a nanometric scale, improving the formation processes of the crystalline microstructure, exchange ionization, adsorption, and immobilization of potentially harmful compounds in soils that, in a traditional approach, would need to be removed or discarded, at significant cost, making them relevant and suitable materials to be used in road construction [66] (Figure 13). ZS additives can increase the strength and stiffness of the soil-cement composites and improve the overall performance of the stabilized layers of pavement [67][68][69].…”

Section: Stabilization Of Amazonian Soils With Chemical Additivesmentioning

confidence: 99%

“…ZS additives can increase the strength and stiffness of the soil-cement composites and improve the overall performance of the stabilized layers of pavement [67][68][69]. In the State of Amazonas, laboratory tests performed in clayey soils have revealed a gain in simple compressive strength (SCS) tests when adding ZS (RoadCem®) to its composition [70][71][72]. For field application, this additive is used at a low dosage (1.2-2.4 kg/m 3 ) [73].…”

Section: Stabilization Of Amazonian Soils With Chemical Additivesmentioning

confidence: 99%

See 1 more Smart Citation

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

View full text Add to dashboard Cite

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.

show abstract

Section: Stabilization Of Amazonian Soils With Chemical Additivesmentioning

confidence: 99%