Economic effects of microsurfacing on Thermally-Cracked pavements

Bae, Abraham; Stoffels, Shelley M

doi:10.1007/s12205-008-0177-y

Cited by 7 publications

(5 citation statements)

References 2 publications

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“…Microsurfacing asphalt mixtures can be described as a cold mix technology for preventive paving maintenance, which involves the application of a combination of polymermodified asphalt emulsion, well-graded fine aggregate, mineral filler (usual cement), water, and chemical additives (if any) at ambient temperature [5][6][7][8]. Extensive studies conducted by the Texas Transportation Institute (TTI) have confirmed the effectiveness of microsurfacing as a valuable method for preventative maintenance and pavement preservation, leading to a substantial increase in the service life of existing pavements.…”

Section: Introductionmentioning

confidence: 99%

Development and Application of a Microsurfacing Mix Design Method to Assess the Influence of the Emulsion Type

et al. 2023

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Microsurfacing asphalt mixtures are a preventive maintenance technology comprising the application of a slurry (produced with a modified asphalt emulsion), aggregate, filler, and water on top of an existing pavement at ambient temperature. Although it is a widely used technology, further studies on the mix design procedures are necessary to ensure an adequate composition. Thus, this study contributes to developing an improved mix design procedure for microsurfacing asphalt mixtures. Different mixtures were prepared, and the influence of the type and amount of asphalt emulsion and the amount of added water and filler (cement) on the characteristics of the mixture were evaluated. Two preliminary tests, referred to as the “pizza test” and the “ball test”, were proposed to determine the initial proportions of added water and cement in the mixture, respectively. Then, consistency, cohesion, and shaking abrasion tests were performed to determine the optimum content of each component and evaluate their influence on the mixture characteristics. The results showed that these tests are essential to optimize the mix composition, even though it was found that the mix design of microsurfacings is a complex task because the mixture is a system with chemical interactions strongly influenced by its composition.

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Section: Introductionmentioning

confidence: 99%

Development and Application of a Microsurfacing Mix Design Method to Assess the Influence of the Emulsion Type

et al. 2023

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“…Quick-setting asphalt emulsions are commonly used for treatments like slurry seals and microsurfacing, which involves laying down a mix of aggregate, mineral filler, and diluted asphalt emulsion, to rectify surface defects. 1 Slurry-seal mixes use both polymer-and non-polymer-modified emulsions and are generally used of lower volume roadways, while microsurfacing uses only polymer-modified asphalt emulsions and is often used on higher volume roads. Slurry-seal and microsurfacing mixtures both require emulsions with a quick controlled break, where emulsions need to remain stable when stored and during initial mixing but need to set rapidly once placed in a thin layer on the pavement surface.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

ζ Potential as a Measure of Asphalt Emulsion Stability

Pinto

Buss

2020

Energy Fuels

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Asphalt emulsions are most often oil-in-water emulsions widely used in pavement preservation treatments as a result of lower application temperatures and versatility for many pavement preservation applications. Asphalt emulsion stability is an important parameter to consider when choosing the type and formulation of an emulsion for a specific pavement preservation treatment. The stability of asphalt emulsions depends upon the suspension of charged asphalt particles in an electrolyte solution. The particle size and ionic stability play an important role, and ζ potential provides a quantitative measure for tracking the stability of the emulsion. ζ potential is the potential difference between the charged asphalt droplet surface in a dispersed phase and oppositely charged ions in a water−emulsifier solution that make up the continuous phase. A high positive or negative ζ potential indicates a stable emulsion, while ζ potential values approaching zero indicate flocculation. This study will consist of two phases. The first phase presents an experimental design to observe the effect of various formulation parameters on the ζ potential of quick-setting asphalt emulsions and create a statistical model of important effects. The second phase studies the influence of aggregate fines of varying reactivity in the asphalt emulsion and determine the point of zero ζ potential for each formulation. This study aims to introduce the parameter of ζ potential in the design process of slurry-seal pavement preservation treatments and help improve the mixture design process and field performance of quick-setting asphalt emulsion mixtures.

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“…The studies of Santo and Reis (1999), Vale (2003), Vale and Suzuki (2004), Reis (2005), ABEDA (2010), Castro (2011) and Ceratti and Reis (2011) can be highlighted in Brazil. Regarding the international literature, the studies on MS are well established, among which it can be mentioned FHWA (1994), Hick et al (1999), Austroads (2003), Hein et al (2003), Bae and Stoffels (2007), CALTRANS (2009), Broughton et al (2012), Ulhman (2010), NCHRP (2010), ISSA A-143 (2010), Apparoa et al (2013), and Ji et al (2013).…”

Section: Introdutionmentioning

confidence: 99%

Evaluation of the use of steel slag in micro surfacing

Castro¹,

Silva²,

Barroso³

2020

TRANSPORTES

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Micro surfacing (MS) is a type of bituminous coating frequently applied in the surface of pavement structures in order to prevent the occurrence of common distress and/or as a maintenance procedure. Micro surfacing has successfully been used in some states of Brazil as well as in many countries all over the world. Local aggregates used for micro surfacing composition are in some cases scarce and/or expensive. Therefore, the main objective of the present research is to verify the technical, financial and environmental viability of using steel slag aggregate (SSA) in micro surfacing applications. To reach the main objective, a procedure was developed in four steps. In the first step it was made the characterization of conventional (granitic) and alternative aggregates (steel slag) and polymer-modified emulsified asphalt. In the second step, mix design, surface abrasion resistance and setting time tests were performed. In the third step, the micro surfacing mechanical performance was analyzed using a laboratory traffic simulator to observe accumulated permanent deformation; surface wear; micro texture and macro texture. In the fourth step, a comparative study of costs concerning micro surfacing application using conventional mineral aggregate (MS-MA) and alternative aggregates (MS-SSA) were performed. The laboratory procedure results indicated that the steel slag studied has the potential to be used in micro surfacing applications with more rutting resistance and better durability. The cost analysis showed for medium transport distances bigger than 60 km, the MS-SSA will be cheaper than MS-MA solution.

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Economic effects of microsurfacing on Thermally-Cracked pavements

Cited by 7 publications

References 2 publications

Development and Application of a Microsurfacing Mix Design Method to Assess the Influence of the Emulsion Type

Development and Application of a Microsurfacing Mix Design Method to Assess the Influence of the Emulsion Type

ζ Potential as a Measure of Asphalt Emulsion Stability

Evaluation of the use of steel slag in micro surfacing

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