Weibull statistical analysis and experimental investigation of size effects on the compressive strength of concrete-building materials

Vu, Chi-Cong; Ho, Ngoc-Khoa; Pham, Thuy-An

doi:10.1016/j.cscm.2022.e01231

Cited by 3 publications

(2 citation statements)

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“…Since the life cycle of civil buildings follows the Weber distribution function (Vu et al 2022), this study uses the Weber distribution function with different parameters to estimate steel waste in civil buildings. Therefore, the scrap steel in civil buildings should be the total stock of steel in completed civil buildings multiplied by the scrap rate of the year.…”

Section: Steel Waste In Civil Buildings Based On Weber Distribution F...mentioning

confidence: 99%

High-resolution mapping and evolution of steel stocks and waste in civil buildings: a case study of Changsha, China

Chen

Gong

Shi

et al. 2023

Environ Sci Pollut Res

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Systematic estimation of steel stocks and waste in urban areas and analysis of its historical evolution pattern is crucial for urban buildings steel recycling and environmental sustainability. However, it is a challenging task to collect big data from different sources and estimate accurately with high resolution.In this study, we proposed a novel hybrid approach (GMB model) to estimate building steel stocks and the annual waste rate through combining Geographic Information System, Material Flow Analysis, and Big Data Mining techniques. We estimated the civil-building steel stocks and amount of waste in Changsha urban area from 1985 to 2020 based on the GMB model, and analyzed the historical evolution pattern of steel stocks by using standard deviation ellipse and kernel density. The results showed that the cumulative steel stock in civil buildings grew from 0.66 million tons in 1985 to 8.26 million tons in 2020. The amount of waste increased by 2557 times. The spatiotemporal analysis showed variations in distribution of the steel stocks are mainly concentrated in the central city, indicating a "central-peripheral" distribution, with a southward trend in the standard deviation ellipse and a southeast-northwest direction in the center of gravity of the steel stocks. There is low-high and high-low spatial aggregation patterns.We also compared the experimental results with the observed data to determine the feasibility of the GMB model. Our study can promote the management of steel resources recycling and aid to achieve the green and low-carbon goals in sustainable development policies.

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Section: Steel Waste In Civil Buildings Based On Weber Distribution F...mentioning

confidence: 99%

High-resolution mapping and evolution of steel stocks and waste in civil buildings: a case study of Changsha, China

Chen

Gong

Shi

et al. 2023

Environ Sci Pollut Res

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show abstract

“…The compressive strength of concrete is usually determined from a uniaxial compression test. This type of loading test can be carried out on concrete specimens of different shapes (eg cylinders or cubes) with several recommended sizes [22]. Concrete is a complex engineering material with different materials and design variables.…”

Section: Compressive Strength Planmentioning

confidence: 99%

Characteristics of Concrete With Rice Husk Ash Local Kutai Kartanegara

Syahrul

2022

JTSP

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Abstract. Concrete material made from natural waste was developed to balance the use of concrete materials resulting from natural exploration with an impact on environmental damage, rice husk is a waste material from rice mills and contains reactive silica and has the benefit of reducing energy consumption in cement production. Laboratory test method in the form of testing the compressive characteristics used standard cube concrete 150 mm x 150 mm x 150 mm with a total sample of 24 samples. The effect of concrete strength on the amount of cement replacement is 0%; 5%; 10% ; and 15% which could be compared with concrete without using husk ash. The compressive strength obtained in terms of the age of the concrete is 28 days. The mechanical properties of husk ash at the age of 28 days gave optimal compressive strength results with the addition of 5% husk ash.

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High-resolution mapping and evolution of steel stocks and waste in civil buildings: A case study of Changsha, China

Chen

Gong

Shi

et al. 2023

Preprint

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Systematic estimation of steel stocks and waste in urban areas and analysis of its historical evolution pattern is crucial for urban buildings steel recycling and environmental sustainability. However, it is a challenging task to collect big data from different sources and estimate accurately with high resolution. In this study, we proposed a novel hybrid approach (GMB model) to estimate building steel stocks and the annual waste rate through combining Geographic Information System, Material Flow Analysis, and Big Data Mining techniques. We estimated the civil-building steel stocks and amount of waste in Changsha urban area from 1985 to 2020 based on the GMB model, and analyzed the historical evolution pattern of steel stocks by using standard deviation ellipse and kernel density. The results showed that the cumulative steel stock in civil buildings grew from 0.66 million tons in 1985 to 8.26 million tons in 2020. The amount of waste increased by 2557 times. The spatiotemporal analysis showed variations in distribution of the steel stocks are mainly concentrated in the central city, indicating a "central-peripheral" distribution, with a southward trend in the standard deviation ellipse and a southeast-northwest direction in the center of gravity of the steel stocks. There is low-high and high-low spatial aggregation patterns. We also compared the experimental results with the observed data to determine the feasibility of the GMB model. Our study can promote the management of steel resources recycling and aid to achieve the green and low-carbon goals in sustainable development policies.

show abstract

Weibull statistical analysis and experimental investigation of size effects on the compressive strength of concrete-building materials

Cited by 3 publications

References 50 publications

High-resolution mapping and evolution of steel stocks and waste in civil buildings: a case study of Changsha, China

High-resolution mapping and evolution of steel stocks and waste in civil buildings: a case study of Changsha, China

Characteristics of Concrete With Rice Husk Ash Local Kutai Kartanegara

High-resolution mapping and evolution of steel stocks and waste in civil buildings: A case study of Changsha, China

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