A Commercial Feasibility Study on Recycled Concrete Aggregate (RCA) in Bangkok Dealing with Random Parameters

Abstract

Abstract. Demolished concrete is found a lot.In developed countries, there is a clever method to dispose such demolished concrete by recycling to get a near quality as natural aggregate in order to reduce natural resources and help concrete waste disposal which is called recycled concrete aggregate (RCA). However, in Bangkok, it is now no strict regulation to dispose demolished concrete. This research studied a feasibility of RCA in Bangkok by simulation which many criteria in the model were assumed to be random parameters; therefore, this research created a model by Monte Carlo Simulation which is differed from other RCA business model simulations that normally use constant parameters. In additions, four conditions were set, first: 100-ton-per-hour constant supplied plant, second: 50-ton-per-hour constant supplied plant, third: 100-ton-per-hour uncertain supplied plant, and fourth: 50-ton-per-hour uncertain supplied plant. The result showed the trend of output rather than 1 simple output thanks to the random inputs. In details, the both constant supplied plant can make a profit, additionally; 100-ton-per-hour plant was more worthwhile than 50-ton-per-hour plant thanks to the economics of scale. On the other hand, for the uncertain supply, 100-ton-per-hour plant was loss, but 50-tonper-hour plant still made a profit.

Uncovering urban transportation infrastructure expansion and sustainability challenge in Bangkok: Insights from a material stock perspective

“…The MI database we elaborated and the material addition estimated for 2037 are able to help government and construction companies understand how many resources are required and inform the market of a large potential for demand of secondary materials. Thailand has already considered the potential use of recycled demolition aggregates for road construction (Pitikunpongsuk, 2013); however, the lack of legislation to treat concrete waste still hinders the promotion and wide use of recycled construction wastes (Chua et al., 2017), which is why we regarded all added materials as raw materials in this study. One possible challenge to enforce this regulation is that, such material is usually downgraded to a low quality and cannot be utilized for durable structures (Limsuwan, 2008).…”