- citati u SCIndeksu: 0
- citati u CrossRef-u:0
- citati u Google Scholaru:[
]
- posete u poslednjih 30 dana:23
- preuzimanja u poslednjih 30 dana:22
|
|
2021, vol. 76, br. 3, str. 291-301
|
Podobnost granulometrijskog sastava agregata za noseće slojeve kolovozne konstrukcije
Suitability of aggregates gradation for base and subbase layers of pavement
Sažetak
Ocena podobnosti granulometrijskog sastava drobljenih kamenih agregata (DKA) za noseće slojeve kolovoznih konstrukcija u Republici Srbiji vrši se na osnovu propisanog graničnog pojasa, stepena neravnomernosti (Cu), koeficijenta zakrivljenosti (Cz), procenta učešća sitnih čestica i čestica manjih od 0,02 mm. Sa druge strane, standardi koji definišu zahteve kvaliteta agregata i mešavina za izgradnju puteva, SRPS EN 13242 i SRPS EN 13285, uvode znatno drugačiji pristup za ocenu podobnosti agregata. Definisane su kategorije. Svaka kategorija podrazumeva određeni granični pojas, dozvoljena odstupanja na sitima, dozvoljene razlike prolaza na susednim sitima. Kategorije se definišu u zavisnosti od područja primene. Za sedam DKA 0/31.5 mm korišćenih pri izgradnji Koridora XI, izvršena je uporedna analiza podobnosti granulometrijskog sastava prema zahtevima postojećih tehničkih specifikacija (TS) JP "Putevi Srbije" (JPPS) i navedenih SRPS EN standarda. Analizirane krive ispunjavaju zahteve navedenih tehničkih specifikacija, a po kategorijama variraju od najstrožih mešavina normalnog granulometrijskog sastava kategorije GA do otvorenih mešavina kategorije GP. Zaključeno je da je princip baziran na definisanju dozvoljenih tolerancija procenta prolaza na sitima i između susednih sita, na terenu pogodniji za kontrolu granulometrijskog sastava i dobre granulisanosti agregata. Tehničke specifikacije treba prilagoditi ovom pristupu.
Abstract
The assessment of the suitability of the granulometric composition of the crushed stone aggregates (CSA) for an unbound base and subbase layers of pavement, in the Republic of Serbia is done based on the defined gradation bands, uniformity degree (Cu), coefficient of curvature (Cz), percentage of fines and percentage of particles passing a 0.02 mm sieve. On the other hand, standards which define the quality requirements of aggregates and unbound mixtures for road construction SRPS EN 13242 and SRPS EN 13285 introduce a significantly different approach to the assessment of the granulometric composition suitability. Categories are defined. Each category includes a particular boundary band, tolerances on sieves, differences in values passing each sieve. The categories are defined depending on the field of the application. For seven CSA 0/31.5 mm used for the construction of Corridor XI, a comparative analysis of the granulometric composition suitability was performed according to the requirements of the existing Technical Specifications (TS) of PE "Roads of Serbia" (PERS) and the specified SRPS EN standards. The analysed curves satisfy those technical requirements, but vary in categories from the most severe mixtures of the normal granulometric composition of the GA category, to the open mixtures of the GP category. It was concluded that the principle based on the defining allowed tolerances on the sieves and between the sieves, is more suitable for field control of of the granulometric composition and the good granularity of the aggregates. Technical Specifications should be modified to this approach.
|
|
|
Reference
|
|
*** (2013) SRPS EN 933-1:2013, Ispitivanje geometrijskih svojstava agregata: Određivanje granulometrijskog sastava - Metoda prosejavanja. deo 1, Tehnički komitet CEN/TC 154
|
|
*** (2010) SRPS EN 13242:2010, Agregati za nevezane i hidraulički vezane materijale za upotrebu u građevinskim radovima i izgradnji puteva. Tehnički komitet CEN/TC 154
|
|
*** (2018) SRPS EN 13285:2018, Nevezane mešavine - specifikacije. Tehnički komitet CEN/TC 227
|
|
Barksdale, R.D., Itani, S.Y. (1989) Influence of Aggregate Shape on Base Behavior. u: Transportation Research Record 1227, Atlanta, Ga: Georgia Institute of Technology, 173-182
|
|
Bilodeau, J.P., Dore, G., Pierre, P. (2008) Gradation Influence on Frost Susceptibility of Base Granular Materials. International Journal of Pavement Engineering, 9(6): 397-411
|
|
Brown, S.F., Chan, F.W.K. (1996) Reduced Rutting in Unbound Granular Pavement Layers Through Improved Grading Design. Proceedings of the Institution of Civil Engineers - Transport, 117(1): 40-49
|
|
Chaulagai, R., et al. (2017) Influence of Maximum Particle Size, Fines Content, and Dust Ratio on the Behavior of Base and Subbase Coarse Aggregates. Transp. Res. Rec. J. Transp. Res. Board, 2655(1): 20-26
|
|
Fang, M., Park, D., Singuranayo, J.L., Chen, H., Li, Y. (2019) Aggregate Gradation Theory, Design and Its Impact on Asphalt Pavement Performance: A Review. International Journal of Pavement Engineering, 20(12): 1408-1424
|
|
Institut Igh D.D. (2017) Građevinski projekt sanacije kolnika. br. 72590-016/17
|
|
Maksimović, M. (2005) Mehanika tla - laboratorijska identifikacija i klasifikacija tla. Građevinska knjiga
|
|
McCulloch, J. (2011) Unbound Aggregates, in ICE Manual of Highway Design and Management, Institution of Civil Engineers. 459-468
|
|
Milinković, D. (2019) Pregled sektora građevinske industrije Srbije koji je obuhvaćen evropskom Uredbom (EU) 305/2011 i očekivan uticaj na industriju. u: Institut za standardizaciju Srbije
|
|
Roberts, F.L., Kandhal, P.S., Brown, E.R., Lee, D.Y. (1996) Hot Mix Asphalt Materials, Mixture Design, and Construction
|
|
Selimović, M. (2000) Mehanika tla i temeljenje. Mostar: Građevinski fakultet Univerziteta 'Džemal Bijedić, deo I
|
|
Smith, M., Collis, L. (2001) Aggregates, Sand, Gravel and Crushed Rock Aggregates for Construction Purposes. London: The Geological Society, 3rd edition
|
|
UK Highways Agency (2016) Road Pavements: Unbound, Cement and Other Hydraulically Bound Mixtures. 800(1)
|
|
Working Group 2.A. (1998) COST 337 Unbound Granular Materials for Road Pavements
|
|
Xiao, Y., Tutumluer, E. (2012) Best Value Granular Material for Road Foundations
|
|
Xiao, Y. (2014) Performance-based Evaluation of Unbound Aggregates Affecting Mechanistic Response and Performance of Flexible Pavements
|
|
Xiao, Y., Tutumluer, E., Qian, Y., Siekmeier, J.A. (2012) Gradation Effects Influencing Mechanical Properties of Aggregate Base-Granular Subbase Materials in Minnesota. Transp. Res. Rec. J. Transp. Res. Board, 2267(1): 14-26
|
|
Yideti, T. (2020) Road Aggregates Characterization. https://www.kth.se/social//514b3ac6f2765412f7cb69e3/Lecture.pdf
|
|
|
|