Scottish Inspection Panel

McHale, M J; Millar, Dougie; Carswell, I

doi:10.1201/b17219-176

Cited by 1 publication

(2 citation statements)

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“…The author concluded that using gritting on the pavement surface improved skid resistance and accelerated the wear process of the binder from the surface. McHale et al (2010) investigated the performance of gritting application on SMA pavements by means of skid resistance and surface texture. This study used 1-2.85 mm quartz-dolerite aggregate mix for gritting the SMA pavement surface between the second and the third rolling with 1 kg=m 2 .…”

Section: Background On Gritting Applicationmentioning

confidence: 99%

“…2. In the light of earlier studies, regulations (GRTRA 2007;McHale et al 2010;MRWA 2010;Baran and Lowe 2011;HTS 2013), preliminary laboratory-based assessment, and in the window of the GDH technical staff, various grit parameters, including aggregate type, size, amount, and spreading time, were determined. The details and the coding system of gritted and nongritted test sections are presented in Table 4.…”

Section: Gritting Application Processmentioning

confidence: 99%

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Site Assessment of Surface Texture and Skid Resistance by Varying the Grit Parameters of an SMA

Gökalp

Saltan

et al. 2022

J. Transp. Eng., Part B: Pavements

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For the safe operation of vehicles, pavement should provide adequate skid resistance, which can be achieved by using high polishing-resistant aggregate in wearing courses. However, supplying high-quality aggregate is not always feasible due to high transportation costs. For this reason, a method called gritting was adapted to meet the Highway Technical Specification (HTS) of Turkey in 2013. According to the method, for certain parts of the country, the wearing course can be constructed with local aggregates that have minimum polished stone value (PSV) of 40 (PSV ≥ 40), but, in this case, the surface must be covered with a high polishing-resistant aggregate (PSV ≥ 50), after the rollers' first pass. The objective of this study was to improve the present gritting method by investigating the effect of grit parameters on pavement performance under real traffic conditions. In this regard, during its construction, the wearing course of O-51 Highway was gritted with different aggregate types (slags and natural), sizes (1-3; 1-5 mm), spreading amount (1.5; 2; 2.5 kg=m 2 ), and spreading time (before and after the first pass of a roller) on eight test sections. Then, the macrotexture and skid resistance performance of these sections were evaluated under real traffic and environmental conditions for longer than 4 years. Changes in surface texture and skid resistance with respect to traffic were determined for each section. The results showed that higher skid resistance values were obtained at the sections gritted with metallurgical slags. Additionally, the sections gritted with 1-5 mm aggregates had better skid resistance than those gritted with 1-3 mm, while the change in mean texture depths were not very significant.

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Section: Background On Gritting Applicationmentioning

confidence: 99%

Section: Gritting Application Processmentioning

confidence: 99%