Influence of nanosilica and diatomite on the physicochemical and mechanical properties of binder at unaged and oxidized conditions

Baldi, Alejandra; Villalobos, Mavis Lili Montero; Moya, José Pablo Aguiar; Salazar, Luis Guillermo Loría

doi:10.1016/j.conbuildmat.2016.09.140

Cited by 36 publications

(15 citation statements)

References 18 publications

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“…It has great advantages in improving asphalt's high-and low-temperature performance, fatigue performance, and water stability [6][7][8][9][10][11]. Wei et al studied the diatomite and SBS composite-modified asphalt by using regression analysis and a modified grey model.…”

Section: Introductionmentioning

confidence: 99%

High‐ and Low‐Temperature Properties and Thermal Stability of Silica Fume/SBS Composite‐Modified Asphalt Mortar

Cao

Chen

et al. 2018

Advances in Materials Science and Engineering

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Recently, China has started paying more attention to environmental protection, and the efficient utilization of exhaust gases produced by smelting has emerged as a key problem concern. e silica fume collected from the exhaust gases produced by smelting ferrosilicon or industrial silicon was often used as a cement concrete admixture. Using silica fume as an asphalt modifier can make exhaust gases profitable. In this study, silica fume/SBS composite-modified asphalt mortar was prepared to improve the performance of asphalt. e effects of the silica fume content, temperature, and ratio of filler asphalt on the composite-modified asphalt mortar were studied through the cone penetration, softening point, viscosity, dynamic shear rheological (DSR) test, and bending beam rheometer (BBR) test. e thermal stability of composite-modified asphalt was analyzed through the thermal analysis test. e results showed that with the increase of silica fume content and ratio of filler asphalt, the high-temperature performance of asphalt mortar was improved; the content of silica fume had a great influence on the low-temperature performance of asphalt mortar, the optimum silica fume content was 7%; increasing the ratio of filler asphalt reduced the low-temperature cracking resistance of asphalt mortar; the incorporation of silica fume enhanced the initial decomposition temperature, thermal residual rate, temperature in which the weight loss rate reaches the maximum, and the endothermic peak of maximum temperature and improved the properties of asphalt.

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Section: Introductionmentioning

confidence: 99%

High‐ and Low‐Temperature Properties and Thermal Stability of Silica Fume/SBS Composite‐Modified Asphalt Mortar

Cao

Chen

et al. 2018

Advances in Materials Science and Engineering

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“…Regarding the rheological behavior, evaluated using the dynamic shear rheometer (DSR), the modified binders present higher complex modulus and lower phase angle [18,64,77,79]. Authors evaluating the binder fatigue with DSR tests, concluded that the nanosilica modifications showed superior fatigue resistance [22,80,81].…”

Section: Effect Of the Modification With Nanomaterials In The Asphaltmentioning

confidence: 99%

A Review of Nanomaterials’ Effect on Mechanical Performance and Aging of Asphalt Mixtures

et al. 2019

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This review addresses the effects of the modifications with nanomaterials, particularly nanosilica, nanoclays, and nanoiron, on the mechanical performance and aging resistance of asphalt mixtures. The desire for high-performance and long-lasting asphalt pavements significantly pushed the modification of the conventional paving asphalt binders. To cope with such demand, the use of nanomaterials for the asphalt binder modification seems promising, as with a small amount of modification an important enhancement of the asphalt mixture mechanical performance can be attained. Several studies already evaluated the effects of the modifications with nanomaterials, mostly focusing on the asphalt binder properties and rheology, and the positive findings encouraged the study of modified asphalt mixtures. This review focuses on the effects attained in the mechanical properties of the asphalt mixtures, under fresh and aged conditions. Generally, the effects of each nanomaterial were evaluated with the current state-of-art tests for the characterization of mechanical performance of asphalt mixtures, such as, permanent deformation, stiffness modulus, fatigue resistance, indirect tensile strength, and Marshall stability. Aging indicators, as the aging sensitivity, were used to evaluate the effects in the asphalt mixture’s aging resistance. Finally, to present a better insight into the economic feasibility of the analyzed nanomaterials, a simple cost analysis is performed.

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“…[ 13 , 14 ]. Alejandra’s [ 15 ] research indicates that the fatigue resistance of a binder with 4% diatomite content is improved. Cong [ 12 ] investigated the physical properties, dynamic rheological behaviors, storage stability, and aging properties of different contents of modified asphalt binders.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation and Improving Mechanisms of Diatomite-Modified Asphalt Mixture

et al. 2018

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Diatomite is an inorganic natural resource in large reserve. This study consists of two phases to evaluate the effects of diatomite on asphalt mixtures. In the first phase, we characterized the diatomite in terms of mineralogical properties, chemical compositions, particle size distribution, mesoporous distribution, morphology, and IR spectra. In the second phase, road performances, referring to the permanent deformation, crack, fatigue, and moisture resistance, of asphalt mixtures with diatomite were investigated. The characterization of diatomite exhibits that it is a porous material with high SiO2 content and large specific surface area. It contributes to asphalt absorption and therefore leads to bonding enhancement between asphalt and aggregate. However, physical absorption instead of chemical reaction occurs according to the results of FTIR. The resistance of asphalt mixtures with diatomite to permanent deformation and moisture are superior to those of the control mixtures. But, the addition of diatomite does not help to improve the crack and fatigue resistance of asphalt mixture.

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Influence of nanosilica and diatomite on the physicochemical and mechanical properties of binder at unaged and oxidized conditions

Cited by 36 publications

References 18 publications

High‐ and Low‐Temperature Properties and Thermal Stability of Silica Fume/SBS Composite‐Modified Asphalt Mortar

High‐ and Low‐Temperature Properties and Thermal Stability of Silica Fume/SBS Composite‐Modified Asphalt Mortar

A Review of Nanomaterials’ Effect on Mechanical Performance and Aging of Asphalt Mixtures

Performance Evaluation and Improving Mechanisms of Diatomite-Modified Asphalt Mixture

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