Dynamic modulus of nanosilica modified porous asphalt

Arshad, Ahmad Kamil; Masri, Khairil Azman; Ahmad, J.; Samsudin, Mohamad Saifullah

doi:10.1088/1757-899x/271/1/012008

Cited by 20 publications

(9 citation statements)

References 7 publications

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“…In addition, PA20 for this study with NMAS of nearly 10 mm displayed higher DM values than those from Zhang et al [18] with NMAS of 19 mm, although they were designed with same %AV. At a glance, the DM values of specimen with large NMAS seem to be lower; however, the effect of NMAS on DM did not result the same tendency as reported [5,19]. The effect of NMAS on DM of PA materials should be investigated further.…”

Section: Dynamic Modulus and The Effect Of Moisture Conditioningmentioning

confidence: 67%

Dynamic Modulus of Porous Asphalt and the Effect of Moisture Conditioning

et al. 2019

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Porous asphalt has been used for permeable pavement to improve safety of roadways and the effectiveness of storm water management. As a surface drainage layer with frequent exposure to water, this material is affected by moisture. In this study, dynamic modulus tests were performed on both moisture unconditioned and conditioned specimens to characterize viscoelastic properties of porous asphalt mixture. The dynamic modulus values of porous asphalt materials with air void content of 9.0% and 20.5% were investigated at dry condition and after specified moisture conditioning cycles. One cycle of moisture conditioning procedure included placing specimens in water tank at 60 °C for 24 h, and then in another water tank at 25 °C for additional 2 h. The results showed that porous asphalt mixture with lower air void content resulted in higher values of dynamic modulus, and these values of porous asphalt with air void content of 9.0% was about 1.5 to 3.0 times that of porous asphalt with air void content of 20.5%. Higher value of the first number of performance graded binder (average 7-day maximum pavement design temperature) seems to make the dynamic modulus values at high temperatures larger. After moisture conditioning, the dynamic modulus of porous asphalt mixture increased, overall, especially at low temperatures. The appropriated selection of asphalt binder, a weakening of asphalt due to moisture damage can be reduced.

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Section: Dynamic Modulus and The Effect Of Moisture Conditioningmentioning

confidence: 67%

Dynamic Modulus of Porous Asphalt and the Effect of Moisture Conditioning

et al. 2019

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“…7, the highest resilient modulus was 974 MPa at 1000ms pulse repetition and the lowest was 744 MPa at 0.2% CF-PA. From the both figure, it can see that the result at different pulse repetition was not show in uniform trend. Thus, the existence of CF in PA was not give impact towards resilient modulus value [7]. This finding is contradicted with a study by Masri et al [8], where the utilization of nanosilica enhanced the properties of porous asphalt.…”

Section: Resilient Modulusmentioning

confidence: 69%

“…The aggregate has been dried and sieved into a selected grading according standard specification PA grading B. The design binder content is adopted from studies by Masri et al [7]. The type of binder used for this study was PEN 60-70 and cellulose fiber (CF) used as additive material with increment 0.2% to 0.6%.…”

Section: A Materialsmentioning

confidence: 99%

Stress-Strain Characteristic of Porous Asphalt Incorporating Cellulose Fiber

Syazni¹,

Azman²,

Kamil³

et al. 2019

IJRTE

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Porous asphalt (PA) is a type of asphalt mixture that has large air void content to increase the drainage capability of flexible pavement. However, PA suffers a few drawbacks such as less durable and less tensile strength due to large air void characteristic. Thus, this study intended to utilize cellulose fiber to increase the overall performance of PA. Cellulose fiber (CF) used were in the range of 0.2% to 0.6% by weight of PA mixture. Among the tests involve to analyze the overall performance of CF modified PA were Abrasion Loss, Marshall Stability, Resilient Modulus and Dynamic Creep. From data analysis, it shows that 0.4% CF significantly increased the abrasion resistance. Meanwhile, highest stability and resilient modulus values obtained at 0.6% CF-PA. From the results, it shows that the addition of CF can significantly enhance the overall performance of PA.

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“…Silica also increases the polarity of the coarse aggregates, which subsequently improves the adhesion between aggregates and binder, which in turn reduces the particle loss due to abrasion [62]. Upon increasing the content of Nanosilica, the rut depth was found to decrease [78,81,83]. However, it is worth mentioning here that, in an open graded friction course (OGFC), rutting is not a major concern due to its thin lifts.…”

Section: Additivesmentioning

confidence: 99%

“…Composite additives have a better effect on the properties of the PAM in comparison to adding a single additive [59,84,85]. Moreover, nanosilica increases the shear modulus and viscosity of the asphalt, which results in anti-oxidation, improved temperature stability, and better fatigue resistance in PAMs [44,81,82,83,86]. Nazari et al [86] explained that nanosilica induces crack path deflection due to its high dispersion, arresting the propagation of cracks.…”

Section: Additivesmentioning

confidence: 99%

Incorporation of Additives and Fibers in Porous Asphalt Mixtures: A Review

2019

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Despite the numerous benefits for preserving the hydrological cycle, permeable pavement systems (PPSs) found their major application in parking spots and for light traffic scenarios due to their limited durability and strength. To make the PPSs suitable for heavy traffic conditions without significant distresses, research is shifting toward the adoption of novel binders and additives for designing multifunctional porous asphalt mixtures which make up the surface course of PPSs. Certain additives are well known for enhancing the durability of dense graded asphalt mixtures and improving fatigue and rutting resistance. However, the studies on the influence of additives on abrasion resistance and binder draindown, which are the common problems in porous asphalt mixtures (PAMs), are still not well established. This paper summarizes best practices performed on PAMs and recommends possible future research directions for its improvement. Particular emphasis is placed on strength and resilience of PAMs by incorporating additives like nanosilica, crumb rubber, warm-mix additives, fibers (such as cellulose, glass, steel, and synthetic fibers), and some eco-friendly materials. It was found that different additives seem to have different effects on the properties of PAMs. Moreover, the combination of additives has synergistic benefits for the performance of PAMs, especially in urban pavements.

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Dynamic modulus of nanosilica modified porous asphalt

Cited by 20 publications

References 7 publications

Dynamic Modulus of Porous Asphalt and the Effect of Moisture Conditioning

Dynamic Modulus of Porous Asphalt and the Effect of Moisture Conditioning

Stress-Strain Characteristic of Porous Asphalt Incorporating Cellulose Fiber

Incorporation of Additives and Fibers in Porous Asphalt Mixtures: A Review

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