Investigation of Stone Matrix Asphalt Mortars

Brown, E R; Haddock, John E.; Crawford, C

doi:10.3141/1530-12

Cited by 20 publications

(13 citation statements)

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“…Silica fume/SBS compositemodified asphalt mortar is a heterogeneous material, and the discreteness of data would be very large if the conventional penetration test is used to evaluate its denseness [15][16][17]. In this paper, the cone penetration test was used to evaluate the consistency of the asphalt mortars.…”

Section: Cone Penetration Testmentioning

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: Cone Penetration Testmentioning

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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“…The structure, composition, and performance of asphalt mortar have direct influence on the road performance of the asphalt pavement. A lot of research about asphalt mortar [2][3][4][5][6] has been done in terms of the standard Marshall test, immersion Marshall test, rutting test, and low-temperature bending test of beam specimens. Zhang et al [7] studied the asphalt mortar property with SHRP equipment dynamic shear rheometer (DSR) and bend beam rheometer (BBR), tested and analyzed the effect of filler-bitumen ratio on performance of mortar at high and low temperatures in 2004; and they recommended that the filler-bitumen ratio should not exceed 1.4 for high-temperature performance and not exceed 1.0 for low-temperature performance.…”

Section: Introductionmentioning

confidence: 99%

Influence of filler–bitumen ratio on performance of modified asphalt mortar by additive

et al. 2013

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When the filler-bitumen ratio of asphalt mortar changes, its adhesion and viscoelasticity will also change, as well as its mechanical performances, such as fatigue durability at normal temperature and low-temperature ductility. Thus, the filler-bitumen ratio directly affects the asphalt mortar's performance. This paper tested the physical indexes of the No. 70 matrix asphalt mortar modified by additive Sasobit (SB) and Sasowam (SW) through dynamic shear rheometer and bending beam rheometer under different temperature conditions, and comprehensively analyzed the high-temperature anti-rutting and fatigue performance, low-temperature crack resistance performance, and ductility of asphalt mortar. The results show that ore powder not only can increase the anti-rutting factor but also can increase the aging resistance of asphalt. SB has better performances than SW at high temperatures. As for the filler-bitumen ratio of asphalt mortar with additive SB, the recommended value is between 0.8 and 1.2, and the value may be a little larger for that with SW.

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“…The better performance of stone matrix asphalt (SMA) is attributed to a better coarse aggregate skeleton in these mixes compared to the dense graded AC. 5,6 The Bailey method of gradation selection reportedly produces an aggregate blend that is packed together in a systematic manner, to form an aggregate skeleton with the required interlock and packing. 7 Thus, directly quantifying the AC internal structure and establishing its relationship to performance will be most beneficial.…”

Section: Introductionmentioning

confidence: 99%

Using X-ray computed tomography to study paving materials

Gopalakrishnan

Ceylan

Inanc

2007

Proceedings of the Institution of Civil Engineers - Constructio

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X-ray computed tomography, a non-destructive threedimensional imaging tool, has been very helpful in medical diagnosis since the first commercial tomographs were constructed in 1973. In recent years it has gained increasing applications in civil engineering materials research. Several investigators have illustrated the use of computed tomography scans for the non-destructive evaluation of soils and have shown promising applications in characterisation, modelling and computational simulation to optimise asphalt concrete mix design, predict performance and conduct investigative forensic studies. This paper provides a detailed review of X-ray computed tomography applications in characterising asphalt concrete and also describes preliminary studies conducted at the Center for Nondestructive Evaluation (CNDE) at Iowa State University for characterising asphalt and concrete materials using X-ray microcomputed tomography or micro-computed tomography. Researchers are currently using the advanced imaging facilities available at the CNDE to develop a deeper understanding of the pavement internal structure, to develop and optimise the various parameters that describe the internal structure and to relate them to the performance of pavements in a scientific way. This will provide the foundations for building more durable and long-lasting transportation infrastructure systems. Using X-ray computed tomography to study paving materials K. Gopalakrishnan PhD, H. Ceylan PhD and F. Inanc PhD X-ray computed tomography, a non-destructive threedimensional imaging tool, has been very helpful in medical diagnosis since the first commercial tomographs were constructed in 1973. In recent years it has gained increasing applications in civil engineering materials research. Several investigators have illustrated the use of computed tomography scans for the non-destructive evaluation of soils and have shown promising applications in characterisation, modelling and computational simulation to optimise asphalt concrete mix design, predict performance and conduct investigative forensic studies. This paper provides a detailed review of X-ray computed tomography applications in characterising asphalt concrete and also describes preliminary studies conducted at the Center for Nondestructive Evaluation (CNDE) at Iowa State University for characterising asphalt and concrete materials using X-ray microcomputed tomography or micro-computed tomography. Researchers are currently using the advanced imaging facilities available at the CNDE to develop a deeper understanding of the pavement internal structure, to develop and optimise the various parameters that describe the internal structure and to relate them to the performance of pavements in a scientific way. This will provide the foundations for building more durable and long-lasting transportation infrastructure systems.

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Investigation of Stone Matrix Asphalt Mortars

Cited by 20 publications

References 0 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

Influence of filler–bitumen ratio on performance of modified asphalt mortar by additive

Using X-ray computed tomography to study paving materials

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