A study on the mechanical behaviour of cement–bitumen treated materials

Bocci, Maurizio; Grilli, Andrea; Cardone, Fabrizio; Graziani, Andrea

doi:10.1016/j.conbuildmat.2010.07.007

Cited by 133 publications

(64 citation statements)

References 30 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%

“…At the end of the reaction of the GGBS and FA, and Ca(OH)2, new hydration products, such as C-S-H gel, is formed (Oner and Akyuz 2007). Table 6 presents model (2) parameters fitting, which has been used to describe the increase of stiffness in CAM (Bocci et al 2011); test fit curves are shown in Figure 6.…”

Section: Figurementioning

confidence: 99%

“…An analytical model has been used to describe the temperature sensitivity using the following formula (3) (Bocci et al 2011):…”

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

confidence: 99%

See 2 more Smart Citations

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%

Section: Figurementioning

confidence: 99%

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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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“…A recent development aimed at achieving excellent engineering properties of CAMs is the use of manufactured fillers. This kind of filler is produced as a blend of reactive, semi-reactive and non-reactive natural fillers [6,7,13,14]. In this study, binary blended fillers (BBFs) contain a combination of fly ash (FA) or granulated blast furnace slag (GGBS) with ordinary Portland cement (OPC), while the ternary blended fillers (TBFs) are a combination of BBFs with silica fume (SF).…”

Section: Introductionmentioning

confidence: 99%

Mechanical, durability and microstructure properties of Cold Asphalt Emulsion Mixtures with different types of filler

Nassar

Mohammed

Thom

et al. 2016

Construction and Building Materials

102

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. AbstractThe primary aim of this study is to investigate the enhancement of Cold Asphalt Emulsion Mixtures (CAEMs) using binary and ternary blended fillers (BBF and TBF), including an indepth assessment of the microstructure. Ordinary Portland cement (OPC), fly ash (FA) and ground granulated blast furnace slag (GGBS) were used for the BBF while silica fume (SF) was added to the BBF to obtain TBF. The mechanical and durability results indicated that the TBF was more suitable than the BBF for the production of CAEMs. The microstructural assessment indicated that the effect of BBF on the internal microstructure of CAEMs was slightly negative and more noticeable in CAEMs containing FA. It is proposed that the addition of SF to BBF mixtures can eliminate the delay in formation of hydration products caused by the bitumen emulsion. Overall, the research suggests that the use of BBF-CAEMs might be appropriate for pavements in cold climate whereas TBF-CAEMs would be effective in road pavements exposed to severe conditions both in hot and cold climates.

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“…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). 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: 98%

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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A study on the mechanical behaviour of cement–bitumen treated materials

Cited by 133 publications

References 30 publications

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

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

Mechanical, durability and microstructure properties of Cold Asphalt Emulsion Mixtures with different types of filler

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

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