A proposed methodology for the global study of the mechanical properties of cold asphalt mixtures

Gómez-Meijide, Breixo; Pérez, Ignacio Pérez

doi:10.1016/j.matdes.2013.12.079

Cited by 57 publications

(27 citation statements)

References 8 publications

(8 reference statements)

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“…A more general conclusion from both ITSM and ITS, is that the interaction of BEC and PWC (and to a lesser extent CT) is complex and that CBEMs must be carefully and accurately designed. This conclusion is consistent with the findings of Gómez-Meijide and Pérez [2].…”

Section: Indirect Tensile Strengthsupporting

confidence: 93%

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Optimizing the mix design of cold bitumen emulsion mixtures using response surface methodology

Nassar

Thom

Parry

2016

Construction and Building Materials

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Nassar, Ahmed I. and Thom, Nicholas and Parry, Tony (2016) Optimizing the mix design of cold bitumen emulsion mixtures using response surface methodology. Construction and Building Materials, 104 . pp. 216-229. ISSN 1879-0526 Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/33157/1/First%20paper-%20Construction%20and %20Building%20Materials%20Journal.pdf 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. AbstractCold mix asphalt (CMA) has been increasingly recognized as an important alternative worldwide. One of the common types of CMA is cold bitumen emulsion mixture (CBEM). In the present study, the optimization of CBEM has been investigated, to determine optimum proportions to gain suitable levels of both mechanical and volumetric properties. A central composite design (CCD) with response surface methodology (RSM) was applied to optimize the mix design parameters, namely bitumen emulsion content (BEC), pre-wetting water content (PWC) and curing temperature (CT). This work aimed to investigate the interaction effect between these parameters on the mechanical and volumetric properties of CBEMs. The indirect tensile stiffness modulus (ITSM) and indirect tensile strength (ITS) tests were performed to obtain the mechanical response while air voids and dry density were measured to obtain volumetric responses.The results indicate that the interaction of BEC, PWC and CT influences the mechanical properties of CBEM. However, the PWC tended to influence the volumetric properties more significantly than BEC. The individual effects of BEC and PWC are important, rather than simply total fluid content which is used in conventional mix design method. Also, the results show only limited variation in optimum mix design proportions (BEC and PWC) over a range of CT from 10 o C to 30 o C. The variation range for optimum BEC was 0.42% and 0.20% for PWC. Furthermore, the experimental results for the optimum mix design were corresponded well with model predictions. It was concluded that optimization using RSM is an effective approach for mix design of CBEMs.

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Section: Indirect Tensile Strengthsupporting

confidence: 93%

“…The benefits include conservation of materials and energy, preservation of the environment and reduction in cost [1,2]. One of the common types of CAM is cold bitumen emulsion mixture (CBEM).…”

Section: Introductionmentioning

confidence: 99%

Optimizing the mix design of cold bitumen emulsion mixtures using response surface methodology

Nassar

Thom

Parry

2016

Construction and Building Materials

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“…Hence, the peak stiffness was achieved with the minimum studied water content (9%). As discussed previously [20][21][22], lower contents of bitumen and water are not advisable when using CDWA, because their high absorption tends to bring about premature setting of the asphalt emulsion during the mixing process, forming clots and thereby obstructing the complete coating of the aggregates.…”

Section: Resilient Modulusmentioning

confidence: 99%

“…This research area has already been explored and a higher rate of success was achieved with other construction materials such as concrete [14][15][16] and HMA [17][18][19], and a study of mixtures with asphalt emulsion was also initiated [20][21][22].…”

Section: Introductionmentioning

confidence: 99%