Partial Replacement of Spent Foundry Sand in Bituminous Mix Design
Gazi Mohammad Harun-Or-Rashid,
Abdullah Al-Mamun,
Ishfaq Eashir Epu
Issue:
Volume 5, Issue 3, May 2020
Pages:
29-33
Received:
1 May 2020
Accepted:
19 June 2020
Published:
5 August 2020
Abstract: Bituminous mixes for flexible pavement construction are most commonly used all over the world. Mainly aggregate, sand, bitumen etc. are used for pavement construction. In this investigation an attempt is made to study the properties of bituminous pavement materials by the partial replacement of spent foundry sand as fine aggregate with an increment of 10%. Foundry sand is a high quality silica sand that is used to form molds for ferrous (iron and steel) and non-ferrous (copper, aluminum, brass etc.) metal castings. Metal casting industries use huge quantity of foundry sand every year and disposed them after being used. This industrial waste occupies large amount of space of the land. If this sand can be utilized in pavement construction, the disposal and pollution problem can be minimized. The main objective of this study is to determine sufficient bitumen content and mix stability to ensure a durable and cost effective pavement after being partial replacement of foundry sand. The proposed mix design will be conducted in accordance with Marshall Mix design. After performing the experimental investigation it is found that for 30% replacement of waste foundry sand provide superior field performance and better stability than the conventional mixes.
Abstract: Bituminous mixes for flexible pavement construction are most commonly used all over the world. Mainly aggregate, sand, bitumen etc. are used for pavement construction. In this investigation an attempt is made to study the properties of bituminous pavement materials by the partial replacement of spent foundry sand as fine aggregate with an increment...
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Dynamics of Passenger Demand and Transport Work in Croatian Public Road Traffic System
Tomislav Bubalo,
Marijan Rajsman,
Tomislav Kukec
Issue:
Volume 5, Issue 3, May 2020
Pages:
34-42
Received:
12 June 2020
Accepted:
2 July 2020
Published:
17 August 2020
Abstract: Passenger demand and transport work are the basic quantitative indicators of the effects achieved in public road passenger transport activities. The research is conducted to determine the need for managing the transport system and planning its further development. The aim of this paper was to determine the dynamics of development of these two sizes in the seventeen-year period from 2000 to 2016, and to use them to develop a prognostic trend model for the future period. Furthermore, the correlation analysis determined the relations between traffic and economic quantities, and the road transport system was compared by mathematical and statistical parameters with all other traffic systems of the Republic of Croatia, in order to determine its share and importance in the Croatian public transport system. Based on the analysis conducted for passenger demand, a future downward trend is projected. Future trends will be identified for transport work based on the developed trend model and correlations between transport and economic sizes. Furthermore, the road transport system accounts for the largest share of transport work and passenger demand in the Croatian public transport system.
Abstract: Passenger demand and transport work are the basic quantitative indicators of the effects achieved in public road passenger transport activities. The research is conducted to determine the need for managing the transport system and planning its further development. The aim of this paper was to determine the dynamics of development of these two sizes...
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