Investigating the Effects of Steel Slag and Different Tack Coats on the Shear Strength of Composite Pavement Layers

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SHAFABAKHSH GHOLAMALI; AHMADI SAEED

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Journal: Journal of Transportation Engineering Year:2020 | Volume:11 | Issue:2 (43) Page(s): 475-495

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Information Journal Paper

Title

Investigating the Effects of Steel Slag and Different Tack Coats on the Shear Strength of Composite Pavement Layers

Author(s)

SHAFABAKHSH GHOLAMALI | AHMADI SAEED | Issue Writer Certificate

Keywords

Composite pavementQ1

tack coatQ2

abrasion resistanceQ2

shear strengthQ1

steel slagQ1

Abstract

The adhesion between Composite pavement layers plays a significant role in the long-term performance of these pavements. As it is known, a weak adhesion between the layers of pavements leads in slippage crack and early fatigue. steel slag is a subsidiary product of iron melting furnace which can be used in pavement layers and concrete pavement. It is used in concrete pavement and caused an increment in the concrete pavement’ s mechanical properties. Therefore, in this research, porous fabric of steel slag is used to increase the roughness of concrete pavement surface and thus increases the adhesion between Composite pavement layers. In order to assess the effects of different tack coats including PG 64-16 bitumen, the crumb rubber bitumen contains natural zeolite and bitumen emulsion (CRS-1), direct shear test is conducted with usage rates of 0. 3, 0. 6, 0. 9, 1. 2, and 1. 5 kg/m2. In order to measure the adhesion properties, the direct shear test was used and also to measure the roughness of the surface of the concrete pavements containing the steel slag, the British pendulum and abrasion tests were applied in accordance with EN 1338. The results of the experiments indicated that the replacement of 50% of steel slag with aggregate caused an increase in mechanical properties and also in accordance with the abrasion standard of EN 1338 it was in appropriate range in terms of wearing. In addition, the results of the Composite pavement shear strength test showed that the optimum rate of applying tack coat was varied from 0. 6 to 0. 9 kg/m2 depending on the type of tack coat. Considering the optimum rate of the shear strength ranking for different bitumen between composite layers was as follows: emulsion bitumen< control bitumen< crumb rubber with zeolite modified bitumen.

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APA: Copy

SHAFABAKHSH, GHOLAMALI, & AHMADI, SAEED. (2020). Investigating the Effects of Steel Slag and Different Tack Coats on the Shear Strength of Composite Pavement Layers. JOURNAL OF TRANSPORTATION ENGINEERING, 11(2 (43) ), 475-495. SID. https://sid.ir/paper/223865/en

Vancouver: Copy

SHAFABAKHSH GHOLAMALI, AHMADI SAEED. Investigating the Effects of Steel Slag and Different Tack Coats on the Shear Strength of Composite Pavement Layers. JOURNAL OF TRANSPORTATION ENGINEERING[Internet]. 2020;11(2 (43) ):475-495. Available from: https://sid.ir/paper/223865/en

IEEE: Copy

GHOLAMALI SHAFABAKHSH, and SAEED AHMADI, “Investigating the Effects of Steel Slag and Different Tack Coats on the Shear Strength of Composite Pavement Layers,” JOURNAL OF TRANSPORTATION ENGINEERING, vol. 11, no. 2 (43) , pp. 475–495, 2020, [Online]. Available: https://sid.ir/paper/223865/en

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