A5020080239- Acoustic Wave Phenomena Research
- Noise Effects and Management
- Asphalt Pavement Performance Evaluation
- Hygrothermal properties of building materials
- Cellular and Composite Structures
- Railway Engineering and Dynamics
- Recycling and utilization of industrial and municipal waste in materials production
- Innovations in Concrete and Construction Materials
- Concrete and Cement Materials Research
- Natural Fiber Reinforced Composites
- Structural Health Monitoring Techniques
- Architectural and Urban Studies
- Construction Management and Sustainability
- Life Cycle Costing Analysis
- Building materials and conservation
- Plant and Biological Electrophysiology Studies
- Vehicle Noise and Vibration Control
- Geotechnical and construction materials studies
- Civil and Geotechnical Engineering Research
- Aerodynamics and Acoustics in Jet Flows
- Safety Warnings and Signage
- Innovative concrete reinforcement materials
- Mechanical and Thermal Properties Analysis
- Geotechnical Engineering and Soil Stabilization
- Infrastructure Maintenance and Monitoring
Vilnius Gediminas Technical University
2016-2025
Kauno Mišku ir Aplinkos Inžinerijos Kolegija
2020
This study investigates the development and acoustic performance of a layered composite structure composed plastic microfibre pulp (PMFP) metamaterial (PAM), designed for low-frequency sound wave control. Addressing dual challenge reducing waste enhancing absorption, research explores use recycled materials in innovative applications. PMFP was tested various thicknesses, while PAM resonators were 3D-printed with adjustable neck lengths diameters to achieve optimal absorption characteristics....
Studies on recycled materials emerged during recent years. This paper investigates samples’ sound absorption properties for panels fabricated of a mixture sludge (PS) and clay mixture. PS was the core material. The measured. We also consider influence an air gap between rigid backing. Different gaps (50, 100, 150, 200 mm) simulate existing acoustic panel systems. Finally, composite coefficients are compared to those typical commercial absorptive ceiling panel. average coefficient PS-clay...
Since society is moving towards sustainable development, interest in secondary use of waste has recently become significant. This paper investigates a process to develop an acoustic material, using two types waste. Composite panels were developed tyre textile fibres (WTTF) and sludge (PS), polyvinyl acetate (PVA) used as binder. Non-acoustic (bulk density, airflow resistivity) (sound absorption coefficient, sound transmission loss) parameters studied. with different proportions WTTF/PS/PVA...
Studies on recycled materials emerged during recent years. This paper investigates the properties of sound absorption and transmission loss structures perforated plastic panel (PPP) backed with rubber granule (RGP). Under production conditions, such a structure could be produced using only waste. The normal incidence was measured ISO 10534-2 ASTM E2611-17 standard methods, respectively. In this study, perforation holes were tilted in steps 15°–45° compared to vertical axis sample. Different...
Wood is a sustainable renewable material that widely used in the building sector. Due to recent trends green initiatives European and other countries, wood waste becoming more popular for sound absorption insulation because of its renewability. Recycled granulated charcoal an effective acoustic treatment. In this study, we investigated coefficients raw species: birch (Betula pendula), pine (Pinus sylvestris), oak (Quercus robur). The impedance tube method was characterize properties...
Environmental issues near roads become more and important in our society daily life. One of the most critical environmental is traffic noise. The present paper study louvred noise barrier designed by authors. provides sound attenuation while allowing airflow sunlight through it. Since resistance low, it requires a shallow foundation compared to conventional barriers. performance was tested experimentally transmission chamber. Airflow simulated using computational fluid dynamics model....
Algae are photosynthesizing organisms found in both freshwater and marine habitats.Studies on algae applications emerged recently due to its fast-growing biomass.Algae widely used for biofuel, wastewater treatment, bioplastic production applications.This paper investigates dried sound absorption applications.The was measured using the impedance tube, transfer function method.Three different types of algae: red, brown, green, their natural mixtures, were this study.The samples changed density...
Abstract Paper sludge is the water treatment waste, which produced during paper production. (PS) waste utilization common problem in EU and internationally. According to management directive No. 2008/98/EC, should not be utilized landfills. In European Union, alone 93 million tons of PS generated yearly. Nowadays most used as fuel for incineration power plants (up 55 %). legislation such avoided well. Very small portion (10 %) construction sector. construction, additive concrete composite...
Abstract Modern world is exposed to various environmental concerns which are closely related human health condition. Since the automatization, became vulnerable noise and waste amounts generated. World Health Organization report states, due noise, Western Europe each year loses approximately 1 million of healthy life years. However, not only concern. Tyres, since they were banned from landfills, enormous problem in a modern society. Approximately 2.6 tonnes tyres generated Europe, out 320...
Plastic and waste production has increased significantly in recent years. According to the various predictions plastic is not slowing down near future. Since 1960, risen 322 million tonnes 2015 expected double next 20 years (Lusher et al., 2017). 2020 statistical data, leading sectors demand are packaging, building construction, with 40.5% 20.4% respectively. In 2019, an estimated 41% of packaging was recycled EU. Despite advantages recycling technologies, there also a number problems....
Traffic calming is the combination of mainly physical measures that reduce negative effects motor vehicle use, alter driver behaviour and improve conditions for non-motorized street users. Vibration measurements were performed by authors this paper near roads with traffic devices. The taken throughout two seasons: in winter summer order to evaluate influence soil freezing on traffic-induced vibrations. only car measured was Fiat Doblo (weight 1,405 kg), its driving speed when passing a bump...
Abstract According to a European Commission report, around 675 000 tons of polyurethane foam waste is generated in Europe annually. Only 11 % this recycled, and the rest goes landfills or incinerated, so it worth looking for new ways treat recycle it. This article examines possibilities recycling such into sound-absorbing materials. With paper, an alternative way proposed. The purpose study evaluate acoustic properties various scraps production mattresses, pillows, other products assess...
Ground-borne vibrations induced by road transport is common source of environmental problem for residents living near roads where large flow vehicles is. Any irregular unevenness surface increase the ground borne vibrations. The ground-borne travel through soil, different types soil have properties and transmission loss different. In this paper spread vibration modelled using numerical modelling represented Surfer software. research considered most in Lithuania: Peat, clay, sandy loam loam....
Speed table is an artificial road (street) surface irregularity, which used to reduce speed of traffic or maintain allowed limit in section. These measures are risk for pedestrians by reducing passing vehicles. Before table, vehicles usually speed, after it, increase their and this could noise. Measurements were carried out during the day time L. Asanavičiūtės Street 5, Vilnius. divided into two parts, inside residential apartment building its environment. Near recorded sound level was 69...
Vertical Speed Control Measures are vertical elevated segments of roadway that require a vehicle to slow. Typical speed control measures include humps, tables, raised sidewalks and intersections. These engineering used reduce risk pedestrians crossing streets where transport flow is big. The object this research table. Measurements ground borne vibration was done 1 m near the table in reference point, same street do not influence traffic speed. Reference measurement point distance as two...
Patalpos aidėjimo trukmė RT,60 labiausiai priklauso nuo garsą sugeriančių medžiagų paviršiaus ploto patalpoje. Patalpų trukmei mažinti gyvenamuosiuose ir visuomeninės paskirties pastatuose naudojamos lengvos, perforuotos medžiagos, kurios dažniausiai yra lubų konstrukcijose. Šiame darbe tiriama tiesioginė sugeriančios medžiagos priklausomybė patalpos trukmės natūrinėmis (in-situ) sąlygomis. Tyrimų metu buvo keičiamas bendras plotas išdėstymas patalpoje, siekiant išsiaiškinti koreliaciją tarp...
Popieriaus gamybos dumblas – tai popieriaus pramonės įmonėse susidarančios nuotekų valymo atliekos. Šioms atliekoms tvarkyti skiriama vis daugiau dėmesio, todėl mokslininkai ieško būdų, kaip efektyviau galima būtų jas panaudoti. Kuriant naujas ir tobulinant esamas garsą sugeriančias medžiagas, yra nuolat vykdomi moksliniai tyrimai. Šiomis dienomis ypač kreipiamas dėmesys į natūralias ar pakartotinai naudotinas kurios galėtų būti modifikuotos sugeriančios medžiagos. Viena iš porėtų medžiagų...
Paper sludge is the water treatment waste, which produced during paper production. (PS) waste utilization common problem in EU and internationally. According to authors Frías et al. main processing factories, percentage reach 35% of product volume. management directive No. 2008/98/EC, should not be utilised landfills. Such legislation generates motivation this study. This study deals with as sound absorbing material. In panels made studied. Sound absorption coefficient predicted Horoshenkov...
Perdirbamų medžiagų tyrimai paskutiniu metu tampa populiaresni. Tokių tyrimų reikalingumą skatina aplinkosauginiu požiūriu vis griežtesnė Europos Sąjungos ir kitų šalių politika. Perdirbant atliekas uždaromas žiedinės ekonomikos ciklas. Šiame straipsnyje nagrinėjamos popieriaus gamybos dumblo (PGD) kompozitinių plokščių pritaikymo galimybės realiose patalpose siekiant pagerinti patalpų akustinę aplinką. Studijos buvo sukurta patikrinta garsą sugerianti konstrukcija „Reguliuojamas membraninis...