Hassan H. Jony; Israa Y. Jahad; Mays F. Al-Rubaie
Abstract
The early use of asphalt for road and street construction began in the late 1800s, and grew rapidly with the emerging automobile industry. Since that time, asphalt technology has made ...
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The early use of asphalt for road and street construction began in the late 1800s, and grew rapidly with the emerging automobile industry. Since that time, asphalt technology has made strides such that today the equipment, techniques and materials used to build asphalt pavement structures are highly sophisticated. Waste glass has been used in highway construction as an aggregate substitute in hot mix asphalt paving. Many countries have recently incorporated glass into their roadway specifications, which had encouraged greater use of the material. While the use of waste glass as filler in hot mix asphalt is still not widely experimented. In this research glass powder is proposed as an alternative to traditional lime stone powder (Gubraa) and ordinary Portland cement fillers in hot asphalt mixtures. Where, the effect of using waste glass powder as mineral filler on Marshall Properties of hot asphalt concrete mixtures is investigated. Nine mixtures with three types of fillers (lime stone powder, ordinary Portland cement and glass powder) and three filler contents (4%, 7% and 10% by weight of total aggregate) are investigated. The main outcome of this research is the possibility of using glass powder as filler in hot asphalt concrete mixtures. The optimum glass powder content is 7%. Where it is found that using of glass powder as filler with such replacement leading to produce asphalt mixture with higher stability (% of increase up to 13%), lower flow (% of decrease up to 39%) and lower density (% of decrease up to 10%) comparing to corresponding ordinary Portland cement or lime stone powder mixtures.
