Rheological Properties of Mineral Filler-Asphalt Mastics and Its Importance to Pavement Performance

The disposal of agricultural straw has been a severe environmental concern in China and many other countries. In this study, the complex modulus of using biochar converted from straw as an alternative mineral filler in asphalt mastic was investigated through both laboratory tests and modeling. The experimental results indicated that the biochar can provide asphalt mastic higher stiffness than the conventional granite mineral filler. It was believed that the special porous structure of biochar providing a thicker coating layer of mineral filler increases the stiffness modulus of asphalt mastic. To consider this factor into the micromechanical model, a modified generalized self-consistent model (MGSCM) with a coating layer was proposed. Besides, the finite element (FE) microstructural model with a coating layer generated by random aggregate distribution method was used to numerically evaluate the effect of the coating layer on the complex modulus of asphalt mastics. The predicted results indicated that the generalized self-consistent model (MGSCM) with a coating layer is an efficient and accurate model for predicting the complex modulus of asphalt mastics. Moreover, the FE modeling proved that the coating layer can significantly improve the complex modulus of asphalt mastics. Therefore, the experiments and modeling carried out in this study provided insight for biochar applications to improve the performance of asphalt mixtures.

Download Full-text

Rheological Properties of Asphalt-Mineral Filler Mastics.

Doboku Gakkai Ronbunshu ◽

10.2208/jscej.1997.571_269 ◽

1997 ◽

pp. 269-277 ◽

Cited By ~ 1

Author(s):

Jian-Shiuh Chen

Keyword(s):

Rheological Properties ◽

Mineral Filler

Download Full-text

High Temperature Rheological Characteristics of Brucite Fiber Modified Asphalt Mastics

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.250-253.703 ◽

2011 ◽

Vol 250-253 ◽

pp. 703-706

Author(s):

Bo Wen Guan ◽

Shuan Fa Chen ◽

Rui Xiong ◽

Yan Ping Sheng ◽

Li Li Ma

Keyword(s):

High Temperature ◽

Rheological Properties ◽

Newtonian Fluid ◽

Rheological Characteristics ◽

Modified Asphalt ◽

Asphalt Mastics

The rheological properties of brucite fiber asphalt mastics are studied by the Brookfield viscosity test in this paper. The results show that at 105°C and 120°C, brucite fiber asphalt mastics shows the characteristics of non-Newtonian fluid. At 135°C and 150°C, it shows the characteristics of Newtonian fluid gradually. When the temperature is higher than 150°C, the asphalt mastics has fully manifested the characteristics of Newtonian fluid. The viscosity increases with the increasing of the dosage of brucite fiber. The value of ZSV increases with the increasing of the dosage of brucite fiber. According to the change law of ZSV, the anti-rutting performance of asphalt mastics is improved by the addition of brucite fiber.

Download Full-text

Pavement Performance Research on Fine Volcanic Ash Modified Asphalt Mastic and Mixture

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.255-260.3382 ◽

2011 ◽

Vol 255-260 ◽

pp. 3382-3386 ◽

Cited By ~ 1

Author(s):

Zhi Guo Chen ◽

Zi Ning Chen ◽

Jian Tao Wu ◽

Hai Chen Yao

Keyword(s):

Volcanic Ash ◽

Asphalt Mixture ◽

Cost Effective ◽

Economic Benefits ◽

Test Methods ◽

Pavement Performance ◽

Modified Asphalt ◽

Asphalt Mastics ◽

Particle Sizer ◽

Performance Research

In this paper, based on advanced test methods such as laser particle sizer, scanning electron microscope, DSR and BBR,studies on physical properties of fine volcanic ash are carried out and the effect of single and composite modification on asphalt mastics and concrete by fine volcanic ash are also studied. Cost-effective of asphalt concrete modified by fine volcanic ash are analyzed as well. Results indicated fine volcanic ash can be qualified as a filler modifier for asphalt mixture and it significantly improves asphalt pavement performance and reduces project cost. Fine volcanic ash has favorable social and economic benefits and a broad application prospect.

Download Full-text

INFLUENCE OF FILLERS ON PROPERTIES OF LIQUID-GLASS COMPOSITIONS

IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA ◽

10.6060/ivkkt.20196212.5915 ◽

2019 ◽

Vol 62 (12) ◽

pp. 51-56

Author(s):

Olga A. Miryuk

Keyword(s):

Specific Surface ◽

Rheological Properties ◽

Surface Area ◽

Liquid Glass ◽

Structural Strength ◽

Thermal Transformation ◽

High Porosity ◽

Mineral Filler ◽

Ore Dressing ◽

Glass Compositions

The article presents the results of studies of compositions based on sodium liquid glass and technogenic fillers of mineral and organic origin. As fillers materials were used that can affect the rheological properties and thermal transformation of liquid glass. The introduction of fillers increases the viscosity of the liquid glass compositions. To ensure the molding properties of compositions with a structural strength of 0.2 MPa, 65% or more of the filler is required. It was found that the molding properties of the compositions depend on type of filler. The greatest increase in the viscosity of the compositions is provided by the flask, slates combustible and lignite-bauxite, which limit the effect of free and adsorption water in the composition of the liquid glass. The effect of dispersity of fillers on the change in the molding properties of compositions was studied. An increase in the specific surface area of fillers from 350 to 550 m2/kg makes it possible to increase the structural strength of molding mixtures by 10 to 30%. To improve the molding properties of compositions characterized by high porosity, it is suggested to use combined fillers: cullet and organic filler; cullet and mineral filler containing pore-forming component (slates combustible, flask, lignite-bauxite, wastes of ore dressing).

Download Full-text

EMPIRICAL AND RHEOLOGICAL PROPERTIES EVALUATION OF MODIFIED ASPHALT BINDER CONTAINING NANOPOLYACRYLATE POLYMER MODIFIER

Jurnal Teknologi ◽

10.11113/jt.v76.5683 ◽

2015 ◽

Vol 76 (9) ◽

Author(s):

E. Shaffie ◽

J. Ahmad ◽

A. K. Arshad ◽

D. Kamarun

Keyword(s):

Rheological Properties ◽

Softening Point ◽

Asphalt Binder ◽

Pavement Performance ◽

Polymer Modification ◽

Modified Asphalt ◽

Complex Shear ◽

Modified Asphalt Binder ◽

Modified Binder ◽

Temperature Susceptibility

In this paper, the effects of nanopolyacrylate (NP) in binder modification on the empirical and rheological characteristics of the conventional binder were explored. The empirical and rheological binder properties were characterized using penetration, softening point, viscosity and dynamic shear rheometer (DSR) respectively. These testings have become useful methods in characterizing of the binder performance on the pavement. The results indicated that NP polymer modification improved the physical properties of the conventional binder such as; penetration, softening point and temperature susceptibility. The results of viscosity test show that the NP polymer modified binder is more viscous than unmodified binder where viscosity increases with the increment of polymer content. The DSR results indicate that the NP polymer improves rheological properties of conventional binder, i.e. increasing the complex shear modulus (G∗) values and rutting parameters (G∗/sin δ), as well as decreasing the phase angle (δ) values. Therefore, it can be concluded that NP polymers considerably improves elastic properties and rutting resistance of binder and thus could be used for enhancing the asphalt pavement performance.

Download Full-text

Effects of Cement and Emulsified Asphalt on Properties of Mastics and 100% Cold Recycled Asphalt Mixtures

Materials ◽

10.3390/ma12050754 ◽

2019 ◽

Vol 12 (5) ◽

pp. 754 ◽

Cited By ~ 9

Author(s):

Yanan Li ◽

Yuchao Lyv ◽

Liang Fan ◽

Yuzhen Zhang

Keyword(s):

Tensile Strength ◽

Rheological Properties ◽

Subsurface Layer ◽

Temperature Stability ◽

Asphalt Mixtures ◽

Mineral Filler ◽

High Temperature Stability ◽

Recycled Asphalt ◽

Technical Specifications ◽

Emulsified Asphalt

Cold recycled asphalt mixtures (CRAM) are a cost-effective and environmentally-friendly way to reuse reclaimed asphalt pavement (RAP). This paper evaluates the rheological properties and microstructure of mineral filler-asphalt mastic, mineral filler-residue mastic, and cement-residue mastic. Then, based on the premise of using 100% RAP with a gradation that was determined experimentally, the effects of emulsified asphalt and cement on the porosity, indirect tensile strength, tensile strength ratio, dynamic stability, and mechanical properties of CRAM were evaluated. It was found that the rheological properties and cohesive coefficient of the cement-residue mastic varied differently to those of the first two types of mastic and the results show that the addition of cement can greatly improve the interfacial bonding between binders and fillers in the mastic, thereby improving the water damage resistance and high-temperature stability of CRAM. The relationships between cement content and the dynamic modulus and phase angle of CRAM are different to that for emulsified asphalt obviously. In addition, under certain conditions, the properties of CRAM can meet the requirements of relevant technical specifications for its application to subsurface layer of pavement. Hence, the use of 100% RAP in CRAM may be feasible.

Download Full-text