@article {SANDBERG:2024:0736-2935:8981,
title = "Noise-reducing double-layer porous pavement with steel slag as aggregate in the top layer",
journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings",
parent_itemid = "infobike://ince/incecp",
publishercode ="ince",
year = "2024",
volume = "270",
number = "3",
publication date ="2024-10-04T00:00:00",
pages = "8981-8992",
itemtype = "ARTICLE",
issn = "0736-2935",
url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/2024/00000270/00000003/art00107",
doi = "doi:10.3397/IN_2024_4167",
author = "SANDBERG, Ulf",
abstract = "This paper presents results of a trial replacing the natural aggregate in the top layer of a double-layer porous asphalt pavement with steel slag. A 200 m long motorway section was paved with this material and performance in terms of macrotexture and noise properties (made annually
with the CPX method) were monitored for an entire life-cycle of 7 years. The results in terms of noise reduction compared to the common Swedish reference pavement (SMA16) indicated an initial noise reduction of about 7 dB; only marginally lower than the same pavement with normal natural aggregate.
By time, this marginal loss in noise reduction was turned into a somewhat higher noise reduction after 5-6 years of service. This was surprising since the steel slag pavement appeared to clog a little more than the conventional double-layer asphalt pavement. Probably, there are (uncertain)
properties in the slag material which balances out the clogging effect. At the present time this pavement has reached an age of 7 years, which is similar as the conventional porous pavement has served on the same road over two lifecycles so far. With its lower noise-reducing deterioration
versus time, steel slag is a promising material for recycling in this way.",
}