Rheological characterization of cold bituminous mastics produced with different mineral additions

Godenzoni, Carlotta; Bocci, Maurizio; Graziani, Andrea

doi:10.1201/9781315281896-25

Cited by 4 publications

(7 citation statements)

References 9 publications

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“…The mixing phase duration was generally limited to prevent the emulsion breaking and the cement hydration processes. This was intended to allow water to form a film around the surface of the mineral addition to hinder the instability of the emulsion and its premature breaking (Godenzoni et al, 2017;.…”

Section: Review On Viscosity Measurement Of Cold Bitumen Emulsion Slu...mentioning

confidence: 99%

“…Time zero of the testing was variable: it was either considered the first contact of water with cement (Fang et al, 2016b), or the instant immediately after the end of the mixing Tan et al, 2014). In some studies, time zero was fixed at a selected time after the end of the mixing (Godenzoni et al, 2017;Zhang et al, 2012). In some experimental studies, before testing, a pre-shear mixing was applied to obtain a breakdown in the slurry structure and get uniform conditions Tan et al, 2014).…”

Section: Review On Viscosity Measurement Of Cold Bitumen Emulsion Slu...mentioning

confidence: 99%

“…In the study of CBE mixtures, the multiscale approach was lately used for predicting the mixture mechanical behaviour starting from the fine aggregate matrix mortar (Graziani et al, 2020b;Mignini et al, 2018;Mignini et al, 2021) or for supporting computational modelling (Fu et al, 2018). Studies on CBE mastics have been proposed for assessing the effect of mineral additions and their interaction with the bitumen emulsion on the rheological behaviour (Garilli et al, 2019;Godenzoni et al, 2017). Similarly to HMA materials, the workability at the scale of CBE mortars and mixtures is considered directly related to the rheological properties of the fresh mastic (Zhang et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Rheological characterisation of cold bitumen emulsion slurries

Mignini

Presti

Airey

et al. 2021

Road Materials and Pavement Design

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Rheological characterisation of cold bitumen emulsion slurriesThe performance of cold bitumen emulsion (CBE) mixtures is strongly linked to an optimised design of the binder blends and mastics. Hence type and dosages of bitumen, mineral additions but also their workability and compactability are key features to be characterised and optimised. This study aims at providing the scientific community with an approach for the fundamental characterisation of CBE materials by means of rotational viscometry. At first, a procedure for measuring the viscosity of CBE slurries using the Brookfield viscometer was investigated by comparing viscosity results obtained by using a traditional spindle geometry and a novel impeller engineered to avoid phase separation during testing: the dual helical ribbon. Afterwards, the effect of different types of mineral additions and bitumen emulsion was measured and modelled, as well as the influence of the overall solids concentration, to get useful information towards optimised design of CBE mixtures. The Krieger-Dougherty model proved to be a powerful tool to fit results and provide fundamental parameters for an improved engineering characterisation of CBE materials. Overall, the dual helical ribbon impeller was demonstrated to be a promising tool for the fundamental rheological characterisation of cold bitumen emulsion slurries.

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Section: Review On Viscosity Measurement Of Cold Bitumen Emulsion Slu...mentioning

confidence: 99%

Section: Review On Viscosity Measurement Of Cold Bitumen Emulsion Slu...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rheological characterisation of cold bitumen emulsion slurries

Mignini

Presti

Airey

et al. 2021

Road Materials and Pavement Design

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“…A unique strain level of 0.05% was adopted as the LVE limit for all mastics in order to simplify the testing procedure. is value was selected on the basis of the LVE limit identified for the LH mastic, although the other mastics had higher LVE limits [8,[15][16][17]. Figure 7 shows the master curves for the three hot mastics ((1) hot mastics made with LF filler added to B50/70, (2) hot mastics with JW filler added to B50/70, and (3) hot mastics with LF plus JW added to B50/70).…”

Section: Frequency Sweepmentioning

confidence: 99%

“…Godenzoni et al [8] evaluated the effects of different mineral fillers on the linear viscoelastic (LVE) properties of cold bituminous mastics. e shear modulus was measured on bituminous mastics prepared with calcium carbonate and cement as filler at filler-to-bitumen volume ratios of 0.15 and 0.3.…”

Section: Introductionmentioning

confidence: 99%

Rheological Properties Comparing Hot and Cold Bituminous Mastics Containing Jet Grouting Waste

Veropalumbo

Russo

Viscione

et al. 2020

Advances in Materials Science and Engineering

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The use of reclaimed asphalt pavement is a practice that is adding significant environmental value to road technologies, not only due to the reduction of materials sent to landfill but also because of the mechanical properties of the reclaimed asphalt (RA) that can be reused. This research focuses on the rheological properties of hot and cold bituminous mastics made up as follows: (1) hot mastics mixed with limestone filler (LF) and bitumen, (2) hot mastics, made from bitumen mixed with jet grouting waste (JW), a mixture of water, cement, and soil derived from land consolidation work in underground tunnels, and (3) hot mastics mixed with LF and JW as filler and bitumen. Three different ratios (0.3, 0.4, and 0.5) of filler per unit of neat bitumen (B50/70) were studied. The same number was used for mixing cold mastics, by using an appropriate laboratory protocol designed since the adoption of a cationic bituminous emulsion. A total of 18 mastics were prepared and investigated. The comparison was carried out using the frequency sweep (FS) test, analysing shear modulus G∗, applying the multistress creep and recovery (MSCR) test (40°C and 60°C) as well as the delta ring and ball (ΔR&B) test, focusing on two main issues: (1) the stiffening effect caused by the filler type used for mixing each mastic, and (2) a comparison, in terms of stiffening effects and nonrecoverable creep compliance (Jnr) of hot and cold mastic performance to highlight JW reuse in mastics. The results showed that the best G∗ performance at test temperatures higher than 30°C is given by cold mastic after 28 days of curing time when JW is added to LF and bitumen. The lowest Jnr value was 40°C and 60°C for the same mastic.

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Modeling of Fatigue-Strength Development in Cold-Emulsion Asphalt Mixtures Using Maturity Method

Chelelgo¹,

Gariy

Shitote

2019

Applied Sciences

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Emulsion asphalts are cost-effective, environmentally friendly, and sustainable alternatives to hot-mix asphalts. Laboratory curing protocols currently used to simulate field curing of emulsion asphalts have been observed to offer conflicting predictions. This study employed the maturity method to account for the combined effects of temperature and time on fatigue-strength development in emulsion asphalts. An emulsion asphalt, composed of 55% reclaimed asphalt pavement, 45% virgin aggregates, 6.2% bitumen emulsion, and 4% pre-mix water was designed following the Asphalt Institute procedure. A total of 168 specimens from the mix were variously cured at 5 °C, 25 °C, 40 °C, and 50 °C for time intervals of 1, 3, 5, 7, 14, 21, and 28 days, before being tested for fatigue-strengths on the four-point bending test jig. It was observed that fatigue-strengths increased with an increase in cure temperature but decreased with an increase in cure duration. A parabolic hyperbolic fatigue-maturity model was developed from results of specimens cured at 5 °C, 25 °C, and 40 °C and validated with results from specimens cured at 50 °C. A strong correlation was observed between predicted fatigue-maturity and laboratory-determined fatigue-strengths at test strain levels between 125 µm/m and 200 µm/m. The study concluded that the laboratory characterization of emulsion asphalts should consider the curing history of the mix.

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Rheological characterization of cold bituminous mastics produced with different mineral additions

Cited by 4 publications

References 9 publications

Rheological characterisation of cold bitumen emulsion slurries

Rheological characterisation of cold bitumen emulsion slurries

Rheological Properties Comparing Hot and Cold Bituminous Mastics Containing Jet Grouting Waste

Modeling of Fatigue-Strength Development in Cold-Emulsion Asphalt Mixtures Using Maturity Method

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