Utilization of bottom ash on thin asphalt surfaced pavements for low volume roads

Transfer plate, setback, P-delta effects, dynamic analysis, earthquakes 1. Introduction With the rapid growth of urban development, high-rise buildings are constructed at an increasing rate. Many apartment buildings are among them, due to high land values in residential areas. In most cases, these apartment buildings will have car parking at the lower floors. Often different grid arrangements exist in the parking and apartment floors that result in the need for setbacks and transfer systems. It should be noted that the transfer plate is generally located at the level of the setback, integrating the behaviour of the two components. It is known that thick plates can be used as transfer plates with an additional advantage of them behaving as outriggers [Balasuriya et al., 2007]. With the popularity of mixed development, most apartment buildings tend to have shopping centers and various other facilities within the same building. With this recent development, the designer may have the flexibility to change the location of the transfer plate, affecting its outrigger behaviour. This paper mainly focuses on how transfer plates can be used effectively in mixed development. The behaviour of a transfer plate is investigated using Three Dimensional Finite Element modelling and its outrigger action is studied by taking into account the different loading conditions such as earthquake and dynamic behaviour under wind conditions, etc. 2. Objective; Article-AbstractMoses, JA; Bandara, RWDK; Mampearachchi, W

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Utilization of bottom ash on thin asphalt surfaced pavements for low volume roads

Moses, JA; Bandara, RWDK; Mampearachchi, W

URI: http://dl.lib.uom.lk/handle/123/18543

DOI: 10.1109/MERCon50084.2020.9185399

Abstract:

More than 65% of the entire road network of Sri Lanka consists of low volume roads with AADT of 1000 vpd or less. The provision of better surfacing for these roads has become one of the main needs nowadays and traditional asphalt pavements are not recommended due to their higher layer thicknesses; thus, higher cost. Therefore, an adaptation of thin surfaced asphalt pavements can yield favorable solutions and this research was carried out to develop mixture design and check the suitability of utilizing bottom ash, to achieve durable, economical and sustainable thin asphalt pavements while reducing the environmental issues associated with the waste generated from the coal power plant. Marshall samples were prepared for DG 7 mixtures with the replacement of 0%, 10%, 20%, and 25% of fine aggregates with bottom ash. The Marshall properties of the specimens were examined and concluded that only DG 7 mixtures with 0% and 10% of bottom ash replacements attained the required Marshall criteria to be used in low volume roads. Even though the mixtures without bottom ash are determined as more economical, mixtures with 10% of bottom ash are recommended as the voids in mineral aggregates criteria were well established in them.

Citation:

J. A. Moses, R. W. D. K. Bandara and W. K. Mampearachchi, "Utilization of Bottom Ash on Thin Asphalt Surfaced Pavements For Low Volume Roads," 2020 Moratuwa Engineering Research Conference (MERCon), 2020, pp. 431-436, doi: 10.1109/MERCon50084.2020.9185399.

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