Compactability and thermal sensitivity of cement–bitumen-treated materials

Grilli, Andrea; Graziani, Andrea; Bocci, Maurizio

doi:10.1080/14680629.2012.742624

Cited by 85 publications

(57 citation statements)

References 8 publications

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“…The higher the α value, the more temperature sensitive the material. The results are comparable with those published by other authors (Pasetto and Baldo 2010, Bocci et al 2011, Grilli et al 2012.…”

Section: Figure 8 Stiffness Modulus Of Cbems At 28 Days Under Differesupporting

confidence: 83%

Characterisation of high-performance cold bitumen emulsion mixtures for surface courses

Nassar

Mohammed

Thom

et al. 2016

International Journal of Pavement Engineering

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Abstract:Cold bitumen emulsion mixture (CBEM) is not yet widely used as a surface courses around the world. In this study, 0/14 mm size dense graded surface course CBEMs have been investigated. The mechanical performance was evaluated in term s of stiffness modulus over 3 months and resistance to permanent deformation under three different stress levels (100, 200, 300kPa) while durability evaluation was carried out in terms of resistance to moisture and frost damage. The study has also investigated the incorporation of low cement content (1%) with relatively sustainable by-product fillers, namely ground granulated blast-furnace slag (GGBS) and fly ash (FA) type 450-S on both mechanical and durability performance. A comparison has been carried out between the low and high cement content CBEM, as well as with respect to corresponding hot mix asphalt (HMA). The results revealed that the incorporation of GGBS and FA in CBEMs leads to superior performance, similar to CBEMs treated with high cement content and comparable to an equivalent HMA. Furthermore, GGBS replacement exhibited better performance than that of FA replacement. The findings suggest that the new sustainable types of CBEM can be developed for using as a surface layer for medium to heavy trafficked roads.

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Section: Figure 8 Stiffness Modulus Of Cbems At 28 Days Under Differesupporting

confidence: 83%

Characterisation of high-performance cold bitumen emulsion mixtures for surface courses

Nassar

Mohammed

Thom

et al. 2016

International Journal of Pavement Engineering

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“…Immediately after mixing, specimens were compacted by means of a shear gyratory compactor (SGC) according to a standardized procedure (Bocci et al 2011;Cardone et al 2014;Grilli et al 2012). In particular, the adopted protocol provided a 150 mm diameter mould, a constant pressure of 600 kPa, a gyration speed of 30 rpm and an angle of inclination of 1.25°.…”

Section: Mixing and Compactionmentioning

confidence: 99%

“…In particular, when the cement content is higher than 1 %, the mixtures are referred to cement-bitumen treated materials (CBTMs). In general, the addition of cement increases strength and stiffness as well as permanent deformation resistance (Du 2014;Grilli et al 2012). Whereas, the presence of bitumen amongst the recycled aggregate affects cohesion, durability and fatigue cracking resistance and reduced moisture sensitivity of the mixture as well (Bocci et al 2011).…”

Section: Introductionmentioning

confidence: 98%

“…Whereas, the presence of bitumen amongst the recycled aggregate affects cohesion, durability and fatigue cracking resistance and reduced moisture sensitivity of the mixture as well (Bocci et al 2011). In addition, the visco-elastic behavior and temperature dependency of the bituminous binder confers to CBTM asphalt-like properties (Cardone et al 2014;Grilli et al 2012).…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Curing on the Mechanical Behavior of Cement-Bitumen Treated Materials

et al. 2015

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The re-use of pavement materials is an efficient and cost-effective solution in road rehabilitation and construction activities, especially when the availability of high-quality virgin aggregates is limited. In this context, cold recycling of bituminous pavements is becoming one the of most attractive and low environmental impact techniques. The use of cold-recycled pavement mixtures requires a careful assessment of their mechanical properties, which are influenced by both compositional and environmental factors. In particular, regardless of aggregate nature, binder type and dosage, a distinctive feature of cold recycled mixtures is the requirement for a certain curing period to develop the ultimate values of strength and stiffness. In this study, the mechanical behaviour of cement-bitumen treated materials (CBTM), containing high percentage of reclaimed asphalt (RA), was evaluated considering the influence of curing time and temperature. Two CBTM containing 1.0 and 2.5 % cement and 2.0 % of fresh bituminous binder were analyzed. Cylindrical specimens were compacted using a gyratory compactor and cured at 25 and 40°C; moisture loss and indirect tensile strength (ITS) were measured at increasing curing times. Results showed that the curing temperature and time (curing conditions) significantly affect the moisture loss by evaporation that therefore can be considered a good estimator of the curing process. Moreover, the mechanical characterization indicated that the moisture loss and the cement content control the increase in strength properties of the investigated CBTM. Results also showed that the cement content strongly affects the moisture loss in addition to assure improved mechanical behavior.

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“…The dimensions of the specimens had to meet the H(height)/D(diameter) > 1.8 requirement. The parameters of the gyratory press were set based on the review of the literature [28,29]. The density of the gyratory specimens had to be approximately the same as that of the specimens compacted using the modified method indicated in [11,12].…”

Section: Tests and Criteriamentioning

confidence: 99%

Multidimensional Analysis of the Effects of Waste Materials on Physical and Mechanical Properties of Recycled Mixtures with Foamed Bitumen

Mazurek

Iwański

2018

Applied Sciences

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Abstract:The paper reports the results from the tests of recycled mixture samples containing waste materials. Six types of waste materials were used in the mineral mix, in various configurations. Statistical inference was based on the multidimensional analysis through the reduction of input data size. Three groups of recycled mixtures were identified, each representing significantly different properties. The first group included rigid recycled mixtures, the second group comprised flexible mixtures, and those with the lowest cohesion and rigidity were in the third group. The statistical inference demonstrated that the recycled mixtures with waste materials to be most recommended were those with a high bitumen content (>2.5%). A high proportion of reclaimed asphalt pavement material was found to provide high performance of the recycled mixture, whereas recycled aggregate reduced the stiffness of the mix and its resistance to moisture.

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Compactability and thermal sensitivity of cement–bitumen-treated materials

Cited by 85 publications

References 8 publications

Characterisation of high-performance cold bitumen emulsion mixtures for surface courses

Characterisation of high-performance cold bitumen emulsion mixtures for surface courses

The Effect of Curing on the Mechanical Behavior of Cement-Bitumen Treated Materials

Multidimensional Analysis of the Effects of Waste Materials on Physical and Mechanical Properties of Recycled Mixtures with Foamed Bitumen

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