Reduction of equivalent continuous A-weighted sound pressure levels by porous elastic road surfaces

Fujiwara, Toshiaki; Meiarashi, Seishi; Namikawa, Yoshiharu; Hasebe, Masaki

doi:10.1016/j.apacoust.2004.12.004

Cited by 20 publications

(5 citation statements)

References 2 publications

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“…Planting concrete is a porous concrete and its products that can satisfy the requirements of green plants, with continuous internal pores that allow water, air, etc., to pass through easily. It not only guarantees its basic function as a material structure, but also reduces the load on the environment and plays an important role in enhancing moisture and heat exchange in the ground, regulating temperature and humidity, and absorbing noise, with significant eco-benefits [ 1 , 2 , 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Aggregate Size and Water/Cement on Compressive Strength and Physiological Performance of Planting Concrete

Chen

Zhao

et al. 2022

Materials

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Planting concrete, an eco-friendly concrete in which plants can grow directly, has been widely used in roof greening and the slopes of rivers. Porosity and compressive strength are important indicators for evaluating the properties of planting concrete. By preparing planting concrete with different aggregate gradations (10–30 mm, 20–40 mm) and water–cement ratios (0.25, 0.27, 0.29, 0.31, 0.33), the effect of aggregate gradation and water–cement ratio on the porosity and compressive strength of the planting concrete was analyzed, the intrinsic relationship between aggregate gradation and plane pore parameters was studied, the strength growth pattern and microscopic strengthening mechanism were studied, the relationship between porosity and compressive strength of the planting concrete were explored, and a tall fescue planting experiment was carried out to evaluate the plantation performance of the planting concrete. The results show that under the same conditions of water–cement ratio, the smaller the particle size of the aggregate, the smaller the porosity of the plane, and the denser the structure. The average diameter of the planting concrete shows an exponential relationship with the porosity of plane. The early growth of the compressive strength of the planting concrete is rapid; the compressive strength has a linear relationship at the ages of 7 days and 28 days. Compared to polynomial and logarithmic functions, the exponential function gives a better insight into the relationship between the porosity and compressive strength of the planting concrete. Tall fescue seeds germinate and grow well; height, cover, and leaf rootstock and element content of plants can be used as indicators to assess the performance of vegetated concrete planting.

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Section: Introductionmentioning

confidence: 99%

Effect of Aggregate Size and Water/Cement on Compressive Strength and Physiological Performance of Planting Concrete

Chen

Zhao

et al. 2022

Materials

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“…El ruido intermitente resulta el más constante (cualquier ambiente y espacio público) siendo el Leq, la energía acústica que contiene el ruido en determinado tiempo (Yang & Cheng, 2016;Yousif & Zuri, 2017). El factor de duración en la medición estadística de la exposición al ruido se ha introducido como magnitud de nivel de presión acústica equivalente (Leq) (Makarewicz, 1984;Fujiwara et al, Meiarashi, Namikawa & Hasebe, 2005). Abad et al, (2011) y Meyer et al, (2017 señalan que, el estrés en el ámbito laboral y social constituye uno, de los efectos indeseables del ruido y este, incide negativamente en la salud humana.…”

Section: Introductionunclassified

Modelamiento kriging para mapas acústicos de las festividades culturales de la región de Puno

Mamani

Paucara

Vilca

et al. 2019

Campus

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Palabras clave: exposición acústica, J-Bessel, mapa vertical, festejos populares aBstraCt Cultural activities are part of the ethical identity in various regions of the world and in some places, generate noise pollution. The purpose of the case study was to determine the spatial modeling of the decibel in thematic maps by means of the Kriging equations at the stops, veneration of the Virgen de la Candelaria in Puno and the carnival of Juliaca. The measurements were made using the road method and the grid. 56 sampling points were established, in addition, four indicators where the averages for the city of Puno were the following: Lmin-74.72 ± 4.42 dB (A); Lmax-108.16 ± 6.18 dB (A); LApk-125.32 ± 9.36 dB (A) and LAeq-93.668 ± 5.29 dB (A) while, in the city of Juliaca were: Lmin-72.14 ± 4.56 dB (A); Lmax-104.83 ± 7.57 dB (A); LApk-122.48 ± 10.37 dB (A) and LAeq-90.443 ± 6.420 dB (A) where when comparing the indicators between the cities, there were statistically significant differences (p <0.05) according to the t-Student test. The maps adjusted to the J-Bessel model showed graphical coherence (p <0.05) for the LAeq of Puno and Juliaca. Prolonged exposure to cultural activities in the region were high where restriction is required during the hours of exposure.

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“…El factor de duración en la medición estadística de la exposición al ruido se ha introducido como magnitud de nivel de presión acústica equivalente (Leq d) (Fujiwara, Meiarashi, Namikawa & Hasebe, 2005;Makarewicz, 1984).…”

Section: Introductionunclassified

Zonificación acústica generada por decibeles no permisibles antropogénicos en la ciudad de Puno, Perú

Mamani¹,

Paucara

Pérez³

2017

Campus

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Reduction of equivalent continuous A-weighted sound pressure levels by porous elastic road surfaces

Cited by 20 publications

References 2 publications

Effect of Aggregate Size and Water/Cement on Compressive Strength and Physiological Performance of Planting Concrete

Effect of Aggregate Size and Water/Cement on Compressive Strength and Physiological Performance of Planting Concrete

Modelamiento kriging para mapas acústicos de las festividades culturales de la región de Puno

Zonificación acústica generada por decibeles no permisibles antropogénicos en la ciudad de Puno, Perú

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