Improvements of quality assurance testing program for subgrade and base layer construction

Rouzmehr, Fouzieh; Choi, Pangil; Nam, Jeong Hee; Won, Moon

doi:10.1016/j.conbuildmat.2021.125157

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…The research of regional level can be carried out the international level (Liu et al, 2018), national level (Sandberg et al, 2021), and provincial level (Chancellor and Lu, 2016). Research at the enterprise level mostly uses the micro data of construction enterprises for analysis, including construction quality (Rouzmehr et al, 2021), management level (Imran et al, 2022), scale efficiency and building energy consumption (Wang et al, 2022). In addition, some experts and scholars have studied the aspects of construction land, environmental pollution (Wang et al, 2021) and carbon emissions in the construction industry (Zhu et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Study on regional differences and convergence of the green development quality of the construction industry: evidence from China

Wang¹

2023

Front. Environ. Sci.

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The green development quality of the construction industry has vital environmental and economic effects. To explore regional differences and convergence, and further provide a reference for the government. Based on the panel data of construction industry development in 31 provinces from 2006 to 2020, this study measured the green development quality of the construction industry in two-dimensional space-time, focuses on the regional differences, the dynamic evolution trend and the convergence of distribution. The findings supported the fact that the green development quality of construction industry was fluctuating upward trend, the overall difference decreased, and the regional difference showed heterogeneity. The convergence rate in the central region was higher than that in the western region, and there was an obvious “catch-up effect.” The green development quality of the construction industry in the national, central region and western region has absolute β convergence. The green development quality of the construction industry in the national, the eastern region and the central region has conditional β convergence. The influence of control variables shows heterogeneity. Based on the conclusions of this study, policy recommendations are put forward from the aspects of science and technology investment, human capital investment and green construction mode.

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Section: Introductionmentioning

confidence: 99%

Study on regional differences and convergence of the green development quality of the construction industry: evidence from China

Wang¹

2023

Front. Environ. Sci.

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“…The temperature difference and its impact on cement concrete pavement have been studied extensively [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. In the code for design of pavement slab in China, the influence of temperature difference has also been taken into account regarding the design and calculation of pavement slabs through empirical values in different regions.…”

Section: Introductionmentioning

confidence: 99%

Study on the Evolution Behavior of Humidity Fields in Cement Concrete Pavements of a Coastal Airport During Early Stages in Humid and Hot Areas

2023

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Airport pavements are prone to early defects during the construction phase, and their early performance during the construction phase is significantly affected by the external temperature field. This article takes the concrete pavement of Xiamen Xiang’an New Airport as an example and uses a three-dimensional (3D) humidity simulation program for cement concrete pavement to study the evolution behavior of the early stage humidity field of the pavement in a humid and hot climate environment. The results indicate that the evolution law of the humidity field of the concrete pavement slab was consistent with the environmental field, presenting a 24 h periodic variation. The environmental field had a significant impact on the humidity of the surface layer of the pavement slab, and the humidity decreased rapidly with time. There was a humidity gradient on both the horizontal plane and the cutting plane of the slab, the horizontal humidity was concentrated from the boundary into the middle of the slab, and the sectional humidity was concentrated from the top to the bottom of the slab. Environmental parameters, construction parameters, and material and structural parameters all influenced humidity through humidity exchange or by changing the saturated vapor pressure inside the slab. The humidity field was most sensitive to environmental humidity and maintenance methods, but less sensitive to material parameters and structural parameters. Through analysis, it is advisable to avoid hot seasons, choose periods of increased environmental humidity, adopt appropriate maintenance methods during construction to reduce humidity stress on the slab, and therefore decrease early stage deterioration and improve service life.

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“…In recent years, much emphasis has been placed on temperature differences and their impact on cement concrete pavement panels domestically and abroad [2][3][4][5][6][7], Scholars have also conducted numerous studies on mechanics [8,9]. China's pavement panel design specification now incorporates the influence of temperature variation on pavement panel design calculations.…”

Section: Introductionmentioning

confidence: 99%

Investigation into the Impact of Humidity on Early Age Cement Concrete Pavement Behavior in Hot and Humid Regions

Chai,

Wang,

et al. 2023

Applied Sciences

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Cement concrete pavement is prone to early deterioration during the construction phase, and the early performance during the construction phase is significantly affected by the external temperature and humidity field. This article selects meteorological parameters in the Fuzhou area as a typical representative of a humid and hot climate and develops a three-dimensional humidity simulation program based on Fick’s law and the finite difference method to study the evolution behavior of the humidity field in early age of cement concrete pavement. It discusses the humidity distribution characteristics of road panels and analyzes the influence and sensitivity of cement type, construction conditions, and road panel structural parameters on road panel humidity. Research has shown that the evolution law of the humidity field of road panels shows a 24-h periodic change with the external environment. The environmental field has a significant impact on the surface humidity of road panels. The horizontal humidity of the panel is concentrated from the boundary to the middle of the panel, and the tangential humidity is concentrated from the top to the bottom of the panel. The humidity field of road panels is the most sensitive to environmental humidity and maintenance methods, but less sensitive to material and structural parameters. Therefore, during construction, it is possible to avoid the hot season and choose a time period when the environmental humidity increases to pour concrete. Appropriate maintenance methods are adopted to reduce the humidity stress of the panels, reduce early age deterioration, and improve their service life.

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Improvements of quality assurance testing program for subgrade and base layer construction

Cited by 5 publications

References 2 publications

Study on regional differences and convergence of the green development quality of the construction industry: evidence from China

Study on regional differences and convergence of the green development quality of the construction industry: evidence from China

Study on the Evolution Behavior of Humidity Fields in Cement Concrete Pavements of a Coastal Airport During Early Stages in Humid and Hot Areas

Investigation into the Impact of Humidity on Early Age Cement Concrete Pavement Behavior in Hot and Humid Regions

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