Determination of water sensitivity of nanosilica added hot mix asphalt

Öz

In this study, the effects of nanosilica (NS) additive on the water sensitivity of hot mix asphalt (HMA) pavements were investigated. For this, NS-modified asphalts were prepared by adding NS at rates of 1%, 3%, 5% and 7% by weight to the pure B 160/220 asphalt. In the study, first of all, the physical properties of pure and modified asphalts were determined by penetration, ductility and softening point experiments, and their viscosities were determined by rotational viscometer (RV) experiment. Then, the optimum asphalt content of the mix was determined according to the Marshall design method. Hot mix asphalt specimens were prepared by keeping this determined ratio constant for pure and modified asphalts. Prepared pure and NS added modified mixture specimens were subjected to Marshall stability, retained Marshall stability (RMS) and indirect tensile strength (ITS) tests. The physical test results showed that the hardness and machinability temperatures of the modified binders increased up to 5% NS. According to the mixture test results, it was determined that NS additive had a positive effect on the sensitivity of road pavements to water, since Marshall stability, RMS and indirect tensile strength ratio (ITSR) values showed significant increases at 5% NS.

Anahtar Kelimeler

• Asphalt
• Nanosilica
• Hot mix asphalt
• Retained marshall stability
• ITS

Kaynakça

1. [1] El-Maaty Behiry AEA. “Laboratory evaluation of resistance to moisture damage in asphalt mixtures”. Ain Shams Engineering Journal, 4(3), 351-363, 2013.
2. [2] Geçkil T, Aksağan Z, İnce CB. “Asfalt kaplamaların nem performansı üzerinde siyah karbonun etkisi”. Düzce Üniversitesi Bilim ve Teknoloji Dergisi, 9(5), 2101-2115, 2021.
3. [3] Omar HA, Yusoff NIM, Mubaraki M, Ceylan H. “Effects of moisture damage on asphalt mixtures”. Journal of Traffic and Transportation Engineering (English Edition), 7(5), 600-628, 2020.
4. [4] Geçkil T, Seloğlu M, İnce CB. “Sıcak karışım asfalt kaplamanın su hasarı direnci üzerinde RET katkısının etkisi”. Fırat Üniversitesi Mühendislik Bilimleri Dergisi, 33(2), 537-546, 2021.
5. [5] Görkem Ç, Şengöz B. “Predicting stripping and moisture induced damage of asphalt concrete prepared with polymer modified bitumen and hydrated lime”. Construction and Building Materials, 23 (6), 2227–2236, 2009.
6. [6] Özen H. “Rutting evaluation of hydrated lime and SBS modified asphalt mixtures for laboratory and field compacted samples”. Construction and Building Materials, 25 (2), 756–765, 2011
7. [7] Petersen JC, Plancher HP, Harnsbergen M. “Lime treatment of asphalt to reduce age hardening and improve flow properties”. In: Proceedings AAPT, 56, 632-653, 1987.
8. [8] Kennedy TW, Anagnos NJ. “Lime treatment of asphalt mixtures”, 4. Center for Transportation Research, Austin, United States, 20–28, 1983.

9. [9] Epps J, Berger E, Anagnos JN, “Moisture sensitivity of asphalt pavements.” A National Seminar, California, United States, 117-177, 2003.
10. [10] Kumar P, Chandra S, Bose S. “Strength characteristics of polymer modified mixes”. International Journal of Pavement Engineering, 7(1), 63–71, 2006.
11. [11] Lazzara G, Milioto S. “Dispersions of nanosilica in biocompatible copolymers”. Polymer Degradation and Stability, 95 (4), 610–617, 2010.
12. [12] Geçkil T, İnce CB, Özpınar ET. “Nanosilikanın bitümün kıvamı, viskozitesi ve mikroyapısına etkileri”. Konya Mühendislik Bilimleri Dergisi, 9(4), 845–857, 2021.
13. [13] Shafabakhsh G, Akbari M, Bahrami H. “Evaluating the fatigue resistance of the innovative modified-reinforced composite asphalt mixture”. Advances in Civil Engineering, 1–10, 2020.
14. [14] Shafabakhsh G, Motamedi M, Firouznia M, Isazadeh M. “Experimental investigation of the effect of asphalt binder modified with nanosilica on the rutting, fatigue and performance grade”. Petroleum Science and Technology, 37(13), 1495–1500, 2019.
15. [15] Chen X, Liu S, Sun L. “Preparation and properties of emulsion asphalt modified by nanosilica/SBR composite”. China Rubber Industry, 54, 337-340, 2007.
16. [16] Nazari H, Naderi K, Moghadas Nejad F. “Improving aging resistance and fatigue performance of asphalt binders using inorganic nanoparticles”. Construction and Building Materials, 170, 591–602, 2018.
17. [17] Shafabakhsh G, Sadeghnejad M, Ebrahimnia R. “Fracture resistance of asphalt mixtures under mixed-mode I/II loading at low-temperature: without and with nano SiO2”. Construction and Building Materials, 266, 2021.
18. [18] Yao H. “Rheological properties and chemical bonding of asphalt modified with nanosilica”. Journal of Materials in Civil Engineering, 25(11), 1619-1630, 2013.
19. [19] Sun L, Xin X, Ren J. “Asphalt modification using nano-materials and polymers composite considering high and low temperature performance”. Construction and Building Materials,133, 358-366, 2017
20. [20] Yusoff NIM. “Evaluation of fatigue behavior of asphalt layers containing nanosilica modified tack coat”. Advances in Materials Science and Engineering, 1-11. 2022.