Studies on the sound absorption characteristics of porous concrete based on the content of recycled aggregate and target void ratio

By Seung-bum Park, D. Seo, Jun Lee. 2005

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Combined effect of silica fume and expanded vermiculite on properties of lightweight mortars at ambient and elevated temperatures (2015, background): “Lightweight concretes present superior properties such as, thermal isolation [5–7], fire/high temperature resistance and so protection [8–13], sound insolation [14–19], strength enough for structural applications and reducing dead load of structure resulting in a decreased cross sections of structur”
Acoustical properties of materials made of vegetable particles with several scales of porosity (2011, background): “Other kinds of porous concrete have already been studied, such as aerated autoclaved concrete [9], porous concrete with grains of irregular shape and dimension [10] or porous concrete using recycled waste concrete aggregate [11].”
Strength, fracture and fatigue of pervious concrete (2013, unknown): “Pervious concrete consists of a carefully controlled amount of paste and an aggregate system with a uniform particle size or a narrow particle size distribution and with little or no sand [1–3].”
Comparative Tests of Beams and Columns Made of Recycled Aggregate Concrete and Natural Aggregate Concrete (2007, background): “However, some hypothetical problems related to durability resulted in recycled aggregates being employed practically only as base filler for pavement construction (Etxeberria et al. 2007; Park et al. 2005; Vancura et al. 2009; Tam et al. 2006; Richardson and Jordan 1994).”