Sound absorption improvement for cementitious materials
Keywords:Acoustic wave absorption, Acoustics, Architectural acoustics, Cements, Constraint theory, Cotton fibers, Materials, Mineral wool, Mortar, Sound insulating materials, Acoustic engineering, Cement binder, Cement mortars, Cementitious materials, Fibrous cement, Fibrous material, In-buildings, Industrial noise, Interior surfaces, Noise levels, Potential benefits, Room acoustics, Sound absorption, Sound reflection, Sound-absorptive materials, Undesirable effects
AbstractAcoustical material plays a number of roles that are important in acoustic engineering such as the control of room acoustics, industrial noise control and studio acoustics. Sound absorptive materials are generally used to counteract the undesirable effects of sound reflection by hard, rigid and interior surfaces and thus help to reduce the reverberant noise levels. Cementitious materials may be used as interior finishing for interior surfaces in buildings. This paper review of sound absorption studies for cementitious materials for their potential benefits in sound absorption and investigate some finishing cementitious materials added with porous and fibrous materials to improve the sound absorption performance. Sprayed cement mortar containing cotton fibers and perlite of an amount of perlite in the region of 80% in relation to the cotton fibers gave the best results. Also sprayed fibrous cement mortar based on mixture of mineral wool and cement binders achieved high sound absorption.
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