Green technology and sustainable urban drainage systems using eco-composite porous concrete: A preliminary study

Abstract

Eco-composite in porous concrete is designed with the mix of concrete and a cement replacement, which have the element waste material that being recycled, for example, rice husk ash (RHA), egg shells, palm oil fly ash, wood waste ash, and many more, for the purpose of ecologically sustainable development, and also for managing stormwater quantity and quality. The various researches related to eco-composite materials have been done, mainly as the construction and building materials. Besides, the porous concrete itself is mainly being used as paving material for the construction of parking lots, sidewalks and secondary roads. Thus, the good quality of porous concrete in terms of the concrete strength, the workability, the porosity, and so on are required. Meanwhile, previous researches related to effective microorganisms (EM) as an admixture in concrete have been done. However, the previous researches of eco-composite, specifically using RHA and EM did not focus on the drainage systems. Therefore, this paper presents a preliminary study of the eco-composite using RHA and EM as a cement replacement, as a green technology and sustainable development in urban drainage systems. For the part of the research, this technology, which is drain covers (slab) as part of the drainage system has been implemented in several areas in Selangor, specifically in Shah Alam in order to mitigate the flash flood, stagnant water lead to the mosquitos fertilization issue, and vandalism of the drainage cover, which cause a safety issue for public. The early findings seem encouraging that indicates the eco-composite porous concrete can be successfully in construction.