Effects of thermal-oxidative aging on rheological properties of montmorillonite modified bitumen

Abstract

Organic montmorillonite (OMMT) modified bitumen nanocomposites was prepared by melt blending. The effects of thin-film oven test(TFOT) and pressure ageing vessel(PAV) on rheological properties of pristine bitumen and OMMT modified bitumen were investigated by dynamic shear rheometer (DSR). The results show that complex modulus (G*) increases, phase angle (δ) decreases and rutting factor (G*/sin δ) is enhanced for the pristine bitumen after TFOT, whereas G*, δ and G*/sin δ of OMMT modified bitumen have a little change before and after TFOT. Besides, the pristine bitumen exhibits a large increase of G* and a great decrease of δ after PAV aging. However, the changes in G* and δ of OMMT modified bitumen are small before and after PAV. Compared with the pristine bitumen, OMMT modified bitumen presents a lower fatigue factor (G*sin δ) after PAV. As a consequence, resistance to thermal-oxidative aging of bitumen is remarkably improved due to the introduction of OMMT.

Keywords

montmorillonite / bitumen / aging / rheological property

References

[1] PetersenJ. C., BranthaverJ. F., RobertsonR. E., HarnsbergerP. M., DuvallJ. J., EnsleyE. K.. Effects of physicochemical factors on bitumen oxidation kinetics [J]. Transport Res Record, 1993, 1391: 1-10

[2] TraxlerR. N.. Relation between bitumen composition and hardening by volatilization and oxidation [J]. Proc Assoc Bitumen Paving Technol, 1961, 30: 359-377

[3] LuX.-h., IsacssonU. L. F.. Effect of ageing on bitumen chemistry and rheology [J]. Constr Build Mater, 2002, 16(1): 15-22

[4] MessersmithP. B., GiannelisE. P.. Synthesis and barrier properties of poly (ɛ-caprolactone)-layered silicate nanocomposites [J]. J Appl Polym Sci, Part A, 1995, 33(7): 1047-1057

[5] KimJ. K., HuC., WooR.. Moisture barrier characteristics of organoclay-epoxy nanocomposites [J]. Compos Sci Technol, 2005, 65(5): 805-813

[6] YuJ.-y., WangL., ZengX., WuS.-p., LiB.. Effect of montmorillonite on properties of styene-butadiene-styrene copolymer modified asphalt [J]. Polym Eng Sci, 2007, 47(9): 1289-1295

[7] YuJ.-y., ZengX., WuS.-p., WangL., LiuG.. Preparation and properties of montmorillonite modified bitumens [J]. Mat Sci Eng A-Struct, 2007, 447(1/2): 233-238

[8] FuY., YuJ.-y., FengP.-c., ZhouL.-p., GuoL.-jie.. Preparation and properties of montmorillonite modified asphalt [J]. Chinese Journal of Wuhan University of Technology, 2007, 29(9): 51-54

[9] PolaccoG., BiondiD., StastnaJ., VlachovicovaZ., ZanzottoL.. Effect of SBS on rheological properties of different base asphalts [J]. Macromal Symp, 2004, 218: 333-342

[10] LuX.-h., IsacssonU. F.. Rheological characterization of styrene-butadiene-styrene copolymer modified bitumens [J]. Construction and Building Materials, 1997, 11(1): 23-32

[11] Garcia-Morales, PartalP., NavarroF. J., Martinez-bozaF. J., GallegosC.. Processing, rheology, and storage stability of recycled EVA/LDPE modified bitumen [J]. Polym Eng Sci, 2007, 47(2): 181-191

[12] ElenaR., MercheF., JuanP. J., BegonaP., MunozM. E., SantamariaA.. Rheological aspects of blends of metallocene-catalyzed atactic polypropylenes with bitumen [J]. Polym Eng Sci, 2004, 44(9): 1792-1799

[13] MastrofiniD., ScarsellaM.. The application of rheology to the evaluation of bitumen aging [J]. Fuel, 2000, 79(4): 1005-1015

[14] RuanY.-h., RichardR. D., CharlesJ. G.. The effect of long-term oxidation on the rheological properties of polymer modified bitumens [J]. Fuel, 2003, 82: 1763-1773

[15] YehP. H., NienY. H., ChenJ. H., ChenW. C.. Thermal and rheological properties of maleated polypropylene modified asphalt [J]. Polym Eng Sci, 2005, 45(8): 1152-1158

[16] BahiaH. U., AndersonD. A.. Glass transition behaviour and physical hardening of asphalt binders [J]. J Assoc Asphalt Paving Technol, 1993, 62: 93-129

[17] PetersenR. E., AndersonD. A., ButtonJ. W.Strategic highway research program, binder characterization and evaluation, Volume 3: Physical Characterization [R], 1994, Washington, SHRP-A-369, National Research Council

[18] PetersenR. E., AndersonD. A., ButtonJ. W.Strategic Highway Research Program, Binder characterization and evaluation, Volume 4: Test methods [R], 1994, Washington, SHRP-A-370, National Research Council