The possible use of Sewage Sludge Ash (SSA) in Self-Consolidating Concrete (SCC) for environmental sustainability
Subject Areas : Structural Engineering
Mohamadreza
Khanban
1
(Department of Civil Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran.)
Mahdi
Mahdikhani
2
(Faculty of Civil Engineering, Imam Khomeini International University, Qazvin, Iran.)
Keywords: Self-Consolidating Mortar, silica fume, Compressive Strength, durability, Waste, Stabilization and Solidification, fresh properties,
Abstract :
Nowadays, waste production is increased due to the growth of technology and excessive use of natural resources as well as production of new chemicals, among which the hazardous wastes are no exception of that stabilization and solidification method is one of the hazardous waste management methods through which the waste materials are stabilized and confined. High flexibility for various pollutant compounds, ease of use, and being economical for large volumes of waste has led researchers to use this method to treat various wastes. In this research, sludge ash from sewage treatment plantsuses as waste in order to perform the stabilization and solidification process. Nine mix designs with a water to cement ratio of 0.46; and 0, 6, and 10 percent dried sludge residue of the Alborz Industrial City in Qazvin as the replacement of fine aggregate; 0, 2, and 4 percent of silica fume; and cement content of 600 kg/m3are produced. The mini slump flow, mini V-funnel, compressive strength, electrical resistancetests were carried out on the solidified samples to investigate the effect of waste on the performance of the mortar.The results show that the use of this waste as a substitute for fine aggregate could be taken into consideration.
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