Chunliang Chen, Zike Zhao, Lirong Zhao, Boruo Yang
In 2018, four air pollutants in Qingdao and Shenzhen were comprehensively analyzed and evaluated according to the standards. According to the results, PM2.5 exceeded its standard by multiples of 1.11 and 1.03 in January and February, respectively, in Shenzhen, and the no-exceedance probability was 84.6%. However, the no-exceedance probability in Qingdao was only 50%. When the maximun index of ambient air quality was used to evaluate the above pollutants, the air pollutant in Shenzhen was NO2 from May to September and PM2.5 in other the months, but the pollutants in Qingdao were different each month. The distribution patterns of the monthly average mass concentration of the pollutants in Shenzhen and Qingdao were consistent with the seasonal distribution. The particulate matter in the air was still the focus of the government in Shenzhen. The sources of air pollutants in Qingdao were diverse, and most pollutants were related to energy combustion.
{"title":"The difference in air pollutants in typical northern and southern CHINA coastal cities-Taking Shenzhen and Qingdao as examples","authors":"Chunliang Chen, Zike Zhao, Lirong Zhao, Boruo Yang","doi":"10.20937/rica.54354","DOIUrl":"https://doi.org/10.20937/rica.54354","url":null,"abstract":"In 2018, four air pollutants in Qingdao and Shenzhen were comprehensively analyzed and evaluated according to the standards. According to the results, PM2.5 exceeded its standard by multiples of 1.11 and 1.03 in January and February, respectively, in Shenzhen, and the no-exceedance probability was 84.6%. However, the no-exceedance probability in Qingdao was only 50%. When the maximun index of ambient air quality was used to evaluate the above pollutants, the air pollutant in Shenzhen was NO2 from May to September and PM2.5 in other the months, but the pollutants in Qingdao were different each month. The distribution patterns of the monthly average mass concentration of the pollutants in Shenzhen and Qingdao were consistent with the seasonal distribution. The particulate matter in the air was still the focus of the government in Shenzhen. The sources of air pollutants in Qingdao were diverse, and most pollutants were related to energy combustion.","PeriodicalId":375092,"journal":{"name":"Revista Internacional de Contaminaciónn Ambiental","volume":"183 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115514310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chang Liu, Shiyan Wang, Xiaobo Liu, Huaidong Zhou, Budong Li, Yan-liang Du, Liang Wang
Hypolimnetic anoxia is often observed in large reservoirs during thermal stratification. In the hypolimnion layer, dissolved oxygen (DO) is continuously consumed by biological and chemical reactions, resulting in a stable anoxic zone at the bottom of the reservoir. The areal hypolimnetic oxygen depletion (AHOD) has been a widely used indicator for hypolimnetic DO depletion, but this indicator could not reflect the DO depletion process at the bottom of deep reservoirs with deposits of pollutant sediments. With Daheiting Reservoir as the study case, the concept of stratified areal hypolimnetic oxygen depletion (S-AHOD) was proposed, and an S-AHOD calculation model was built, which could accurately describe the DO depletion process in the anoxic zone at the bottom of Daheiting Reservoir, identify the DO depletion rate at different water depths in the anoxic zone and quantify the contribution of sediment oxygen demand to the overall oxygen depletion. It was found that sediment oxygen demand contributed considerably (41.4%) to the overall hypolimnetic DO depletion in the reservoir, DO depletion rate varied considerably at different water depths, which increased from the surface to the bottom of the reservoir and reached the maximum at the bottom layer. Finally, based on results of existing works, an AHOD calculation equation applicable to lakes and reservoirs with considerable deposits of heavily pollutant sediments was put forward.
在热分层过程中，在大型储层中经常观察到低氧缺氧。在低阴离子层中，溶解氧(DO)不断被生物和化学反应消耗，导致储层底部形成稳定的缺氧区。面积低氧耗氧量(AHOD)是目前广泛应用的低氧耗氧量指标，但该指标不能反映含污染物沉积物的深层水库底部的DO耗氧量过程。以大黑亭水库为研究对象，提出了分层面低氧耗氧量(stratified area hypoimnetic oxygen depletion, S-AHOD)概念，并建立了S-AHOD计算模型，该模型能够准确描述大黑亭水库底部缺氧带的DO耗氧量过程，识别缺氧带不同水深的DO耗氧量，量化沉积物需氧量对总体耗氧量的贡献。研究发现，沉积物需氧量对库区整体低通量DO耗竭的贡献较大(41.4%)，不同水深下DO耗竭率差异较大，从库区表层到库区底层逐渐增大，在库区底层达到最大值。最后，在已有工作成果的基础上，提出了适用于含重污染物沉积物较多的湖泊和水库的ahd计算公式。
{"title":"Analysis of contributing factors to dissolved oxygen depletion in the anoxic zone and their respective contributions based on stratified hypolimnetic oxygen depletion","authors":"Chang Liu, Shiyan Wang, Xiaobo Liu, Huaidong Zhou, Budong Li, Yan-liang Du, Liang Wang","doi":"10.20937/rica.54423","DOIUrl":"https://doi.org/10.20937/rica.54423","url":null,"abstract":"Hypolimnetic anoxia is often observed in large reservoirs during thermal stratification. In the hypolimnion layer, dissolved oxygen (DO) is continuously consumed by biological and chemical reactions, resulting in a stable anoxic zone at the bottom of the reservoir. The areal hypolimnetic oxygen depletion (AHOD) has been a widely used indicator for hypolimnetic DO depletion, but this indicator could not reflect the DO depletion process at the bottom of deep reservoirs with deposits of pollutant sediments. With Daheiting Reservoir as the study case, the concept of stratified areal hypolimnetic oxygen depletion (S-AHOD) was proposed, and an S-AHOD calculation model was built, which could accurately describe the DO depletion process in the anoxic zone at the bottom of Daheiting Reservoir, identify the DO depletion rate at different water depths in the anoxic zone and quantify the contribution of sediment oxygen demand to the overall oxygen depletion. It was found that sediment oxygen demand contributed considerably (41.4%) to the overall hypolimnetic DO depletion in the reservoir, DO depletion rate varied considerably at different water depths, which increased from the surface to the bottom of the reservoir and reached the maximum at the bottom layer. Finally, based on results of existing works, an AHOD calculation equation applicable to lakes and reservoirs with considerable deposits of heavily pollutant sediments was put forward.","PeriodicalId":375092,"journal":{"name":"Revista Internacional de Contaminaciónn Ambiental","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130909458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Recycled steel fiber-reinforced concrete is a new hybrid high performance environmental protection composite material, which can be widely used in the construction industry and provide a new research direction for national green and sustainable development. In this study, three-point bending beams with a prefabricated incision were used to evaluate the fracture performance of plain concrete, steel fiber-reinforced concrete and recycled steel fiber-reinforced concrete with different fiber volume contents, fiber length-diameter ratios and relative incision depths based on digital image correlation technology. The results show that recycled steel fibers can improve the crack resistance of concrete beams better than ordinary steel fibers; The crack resistance of specimens increases with the increases of volume ratio of recycled steel fibers, and when the fiber content is from 0.0 % to 1.0 %, the increased amplitude of the crack resistance of specimens increases gradually, when the fiber content is from 0.5 % to 1.0 %, the increased amplitude of the crack resistance of specimens reaches the maximum, and when the fiber content is from 1.0 % to 1.5 %, the increased amplitude of the crack resistance of specimens decreases; The crack resistance of specimens increases with the increases of length-diameter ratio of recycled steel fibers, and when the fiber length-diameter ratio is from 30 to 50, the crack resistance of specimens increases relatively large, when the fiber length-diameter ratio is from 50 to 70, the crack resistance of specimens increases relatively small; The crack resistance of specimens decreases with the increases of relative incision depth of specimens, and when the relative incision depth is from 0.2 to 0.3, the crack resistance of specimens decreases relatively large, when the relative incision depth is from 0.3 to 0.4, the crack resistance of specimens decreases relatively small; The equivalent fracture toughness of concrete beams does not change with the changes in the relative incision depth. The simulated results correlated well with the experimental results, except some macroscopic phenomena during the cracking process. This study can provide references for the research of fracture behavior of steel fiber-reinforced concrete materials and the recycling of steel wire from waste tires.
{"title":"Study on equivalent fracture toughness of recycled steel fiber-reinforced concrete based on digital image correlation technology","authors":"Yan Li, Rong-hua Zhao, W. Dong, Geng Chen","doi":"10.20937/rica.54407","DOIUrl":"https://doi.org/10.20937/rica.54407","url":null,"abstract":"Recycled steel fiber-reinforced concrete is a new hybrid high performance environmental protection composite material, which can be widely used in the construction industry and provide a new research direction for national green and sustainable development. In this study, three-point bending beams with a prefabricated incision were used to evaluate the fracture performance of plain concrete, steel fiber-reinforced concrete and recycled steel fiber-reinforced concrete with different fiber volume contents, fiber length-diameter ratios and relative incision depths based on digital image correlation technology. The results show that recycled steel fibers can improve the crack resistance of concrete beams better than ordinary steel fibers; The crack resistance of specimens increases with the increases of volume ratio of recycled steel fibers, and when the fiber content is from 0.0 % to 1.0 %, the increased amplitude of the crack resistance of specimens increases gradually, when the fiber content is from 0.5 % to 1.0 %, the increased amplitude of the crack resistance of specimens reaches the maximum, and when the fiber content is from 1.0 % to 1.5 %, the increased amplitude of the crack resistance of specimens decreases; The crack resistance of specimens increases with the increases of length-diameter ratio of recycled steel fibers, and when the fiber length-diameter ratio is from 30 to 50, the crack resistance of specimens increases relatively large, when the fiber length-diameter ratio is from 50 to 70, the crack resistance of specimens increases relatively small; The crack resistance of specimens decreases with the increases of relative incision depth of specimens, and when the relative incision depth is from 0.2 to 0.3, the crack resistance of specimens decreases relatively large, when the relative incision depth is from 0.3 to 0.4, the crack resistance of specimens decreases relatively small; The equivalent fracture toughness of concrete beams does not change with the changes in the relative incision depth. The simulated results correlated well with the experimental results, except some macroscopic phenomena during the cracking process. This study can provide references for the research of fracture behavior of steel fiber-reinforced concrete materials and the recycling of steel wire from waste tires.","PeriodicalId":375092,"journal":{"name":"Revista Internacional de Contaminaciónn Ambiental","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127927195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In May 2014, China mentioned the concept of the “new normal” for the first time. The “new normal” economy promotes growth through development, replacing GDP growth with the all-round development of society and attaching greater importance to the sustainable development of society. China is a large recipient of foreign direct investment (FDI). Under the background of the “new normal”, it is worth exploring the impact of increased environmental supervision in China on FDI. This paper introduces the Pollution Information Transparency Index, which has been published in China since 2008, to quantify environmental information disclosure. The study also collects data about the Pollution Information Transparency Index and the FDI of all provinces and cities in China from 2014 to 2018. Finally, a regression analysis and a difference-in-difference model are constructed to analyze the impact of environmental information disclosure on FDI. The results show that, under the “new normal” economy, highly-disclosed environmental information has a significant impact on FDI inflow in China. The impact is different in terms of population density, investment in pollution control, and GDP in different regions. This paper ovides new ideas for environmental governance and the further utilization of foreign investment under the “new normal”.
{"title":"Research on the impact of environmental information disclosure on foreign direct investment based on the “new normal” in China","authors":"Chunxia Wu, Xianhua Wu, Xinze Chen, Xiaohui Xu","doi":"10.20937/rica.54429","DOIUrl":"https://doi.org/10.20937/rica.54429","url":null,"abstract":"In May 2014, China mentioned the concept of the “new normal” for the first time. The “new normal” economy promotes growth through development, replacing GDP growth with the all-round development of society and attaching greater importance to the sustainable development of society. China is a large recipient of foreign direct investment (FDI). Under the background of the “new normal”, it is worth exploring the impact of increased environmental supervision in China on FDI. This paper introduces the Pollution Information Transparency Index, which has been published in China since 2008, to quantify environmental information disclosure. The study also collects data about the Pollution Information Transparency Index and the FDI of all provinces and cities in China from 2014 to 2018. Finally, a regression analysis and a difference-in-difference model are constructed to analyze the impact of environmental information disclosure on FDI. The results show that, under the “new normal” economy, highly-disclosed environmental information has a significant impact on FDI inflow in China. The impact is different in terms of population density, investment in pollution control, and GDP in different regions. This paper ovides new ideas for environmental governance and the further utilization of foreign investment under the “new normal”.","PeriodicalId":375092,"journal":{"name":"Revista Internacional de Contaminaciónn Ambiental","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123584436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
There are many problems in the practical use of tactile ground surface indicators (TGSIs), and the large amount of TGSI construction currently being carried out does not always have a beneficial impact on the travel of visually impaired groups. Taking the roadside pedestrian space in the Gulou District of Nanjing City as an example, this paper established a TGSI quality evaluation system including six first-level indicators and 24 second-level indicators. The analytic hierarchy process (AHP) was used to determine the weight of the indicators at all levels, and evaluate six urban main roads, six urban secondary main roads and six sidewalks beside access roads, which were selected randomly. Visually impaired people were then asked to evaluate the TGSIs in the pedestrian spaces along these roads. Statistical analysis and evaluation showed that the indicators used in the evaluation system were satisfactory. The evaluation results revealed problems with the standardization, safety, accessibility, continuity, comfort and aesthetics of TGSIs in the urban roadside pedestrian space of Gulou. Analysis of the combined data showed that travel conditions for the visually impaired are currently worse in the old city area than in the new city area and that they are worse in low-grade pedestrian space than along high-grade roads. In order to solve these problems, strategies are put forward for improving the quality of TGSIs in the pedestrian space of Nanjing’s Gulou District in four aspects: improving TGSI structure, optimizing TGSI location, improving the TGSI system, and adapting TGSI implementation according to local conditions.
{"title":"Improving tactile ground surface indicators based on fuzzy-ahp method: The case of Gulou district, Nanjing, China","authors":"Xiaochun Hong, Xiang Ji, Yaxi Gong","doi":"10.20937/rica.54385","DOIUrl":"https://doi.org/10.20937/rica.54385","url":null,"abstract":"There are many problems in the practical use of tactile ground surface indicators (TGSIs), and the large amount of TGSI construction currently being carried out does not always have a beneficial impact on the travel of visually impaired groups. Taking the roadside pedestrian space in the Gulou District of Nanjing City as an example, this paper established a TGSI quality evaluation system including six first-level indicators and 24 second-level indicators. The analytic hierarchy process (AHP) was used to determine the weight of the indicators at all levels, and evaluate six urban main roads, six urban secondary main roads and six sidewalks beside access roads, which were selected randomly. Visually impaired people were then asked to evaluate the TGSIs in the pedestrian spaces along these roads. Statistical analysis and evaluation showed that the indicators used in the evaluation system were satisfactory. The evaluation results revealed problems with the standardization, safety, accessibility, continuity, comfort and aesthetics of TGSIs in the urban roadside pedestrian space of Gulou. Analysis of the combined data showed that travel conditions for the visually impaired are currently worse in the old city area than in the new city area and that they are worse in low-grade pedestrian space than along high-grade roads. In order to solve these problems, strategies are put forward for improving the quality of TGSIs in the pedestrian space of Nanjing’s Gulou District in four aspects: improving TGSI structure, optimizing TGSI location, improving the TGSI system, and adapting TGSI implementation according to local conditions.","PeriodicalId":375092,"journal":{"name":"Revista Internacional de Contaminaciónn Ambiental","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121554755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Industrial green fiber-reinforced concrete, a new hybrid high performance environmental protection material, can be made by adding recycled steel fibers into concrete in a certain proportion. As a composite material used in the construction industry, it can provide a new research direction for national green and sustainable development. This paper studied the interface bonding mechanism of normal steel fiber-reinforced old and new concrete and industrial green fiber-reinforced concrete and old concrete by using a self-made new fixture, and discussed the influence of compressive stress, types of steel fibers and recycled steel fiber content on the bonding compression-shear performance of specimens. The results show that the bonding compression-shear performance of specimens gradually increases with the increases of the compressive stress acting perpendicular to the shearing surface within the range of low compressive stress, and when the compressive stress is from 0.2 MPa to 1.0 MPa, the increased amplitude of the bonding compression-shear performance of specimens gradually increases, when the compressive stress is from 0.6 MPa to 1.0 MPa, the increased amplitude of the bonding compression-shear performance of specimens reaches the maximum, and when the compressive stress is from 1.0 MPa to 1.4 MPa, the increased amplitude of the bonding compression-shear performance of specimens decreases. Under the same conditions, the effect of the recycled steel fibers on improving the bonding compression-shear performance between old and new concrete is better than normal steel fibers. The bonding compression-shear performance between old and new concrete gradually increases with the increases of the volume ratio of recycled steel fibers, and when the fiber content is from 0.0 % to 1.0 %, the increased amplitude of the bonding compression-shear performance of specimens gradually increases, when the fiber content is from 0.5 % to 1.0 %, the increased amplitude of the bonding compression-shear performance of specimens reaches the maximum, and when the fiber content is from 1.0 % to 1.5 %, the increased amplitude of bonding compression-shear performance of specimens decreases. The simulation results of industrial green fiber-reinforced concrete and old concrete specimens with fiber content of 1.5 % under different compressive stresses are basically in agreement with the experimental results. This study can provide references for the research of bonding compression-shear behavior of steel fiber-reinforced old and new concrete materials and the recycling of steel wire from waste tires.
{"title":"Study on bonding compression-shear performance between industrial green fiber-reinforced concrete and old concrete","authors":"Yan Li, Rong-hua Zhao, W. Dong, Qiaojun Jiang","doi":"10.20937/rica.54416","DOIUrl":"https://doi.org/10.20937/rica.54416","url":null,"abstract":"Industrial green fiber-reinforced concrete, a new hybrid high performance environmental protection material, can be made by adding recycled steel fibers into concrete in a certain proportion. As a composite material used in the construction industry, it can provide a new research direction for national green and sustainable development. This paper studied the interface bonding mechanism of normal steel fiber-reinforced old and new concrete and industrial green fiber-reinforced concrete and old concrete by using a self-made new fixture, and discussed the influence of compressive stress, types of steel fibers and recycled steel fiber content on the bonding compression-shear performance of specimens. The results show that the bonding compression-shear performance of specimens gradually increases with the increases of the compressive stress acting perpendicular to the shearing surface within the range of low compressive stress, and when the compressive stress is from 0.2 MPa to 1.0 MPa, the increased amplitude of the bonding compression-shear performance of specimens gradually increases, when the compressive stress is from 0.6 MPa to 1.0 MPa, the increased amplitude of the bonding compression-shear performance of specimens reaches the maximum, and when the compressive stress is from 1.0 MPa to 1.4 MPa, the increased amplitude of the bonding compression-shear performance of specimens decreases. Under the same conditions, the effect of the recycled steel fibers on improving the bonding compression-shear performance between old and new concrete is better than normal steel fibers. The bonding compression-shear performance between old and new concrete gradually increases with the increases of the volume ratio of recycled steel fibers, and when the fiber content is from 0.0 % to 1.0 %, the increased amplitude of the bonding compression-shear performance of specimens gradually increases, when the fiber content is from 0.5 % to 1.0 %, the increased amplitude of the bonding compression-shear performance of specimens reaches the maximum, and when the fiber content is from 1.0 % to 1.5 %, the increased amplitude of bonding compression-shear performance of specimens decreases. The simulation results of industrial green fiber-reinforced concrete and old concrete specimens with fiber content of 1.5 % under different compressive stresses are basically in agreement with the experimental results. This study can provide references for the research of bonding compression-shear behavior of steel fiber-reinforced old and new concrete materials and the recycling of steel wire from waste tires.","PeriodicalId":375092,"journal":{"name":"Revista Internacional de Contaminaciónn Ambiental","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129745052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper mainly studies the bond performance between a single recycled steel fiber and concrete, to attain the overall bond strength of recycled steel fibers reinforced concrete. By measuring the load displacement curve of the recycled steel fibers under pullout, we ascertain the maximum bonding stresses of the recycled steel fibers with different depths, angles and shapes while undergoing interfacial pull-out. At the same time, through observations and calculations, the failure phenomena of three stages and the changing trend of bond stresses of recycled steel fibers along the anchorage section are obtained. It is evidenced that the recycled steel fibers reinforced concrete has good interfacial bonding performance. Numerical simulation results of fiber pull-out process via the finite elements provide conditions for the analysis of bond strength of recycled steel fibers reinforced concrete cubes under different circumstances.
{"title":"Steel fibers from waste tires as reinforcements in concrete: Analysis of bond mechanism","authors":"Y. Li, Xiao-peng Wang, W. Dong, Langjing Shi","doi":"10.20937/rica.54406","DOIUrl":"https://doi.org/10.20937/rica.54406","url":null,"abstract":"This paper mainly studies the bond performance between a single recycled steel fiber and concrete, to attain the overall bond strength of recycled steel fibers reinforced concrete. By measuring the load displacement curve of the recycled steel fibers under pullout, we ascertain the maximum bonding stresses of the recycled steel fibers with different depths, angles and shapes while undergoing interfacial pull-out. At the same time, through observations and calculations, the failure phenomena of three stages and the changing trend of bond stresses of recycled steel fibers along the anchorage section are obtained. It is evidenced that the recycled steel fibers reinforced concrete has good interfacial bonding performance. Numerical simulation results of fiber pull-out process via the finite elements provide conditions for the analysis of bond strength of recycled steel fibers reinforced concrete cubes under different circumstances.","PeriodicalId":375092,"journal":{"name":"Revista Internacional de Contaminaciónn Ambiental","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130440226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study investigates integrated application of solar thermal collectors (STCs), as green renewable energy, on the design of green residential buildings (GRBs). With the gradual increase of residential buildings, the use of solar thermal energy has be- come the main popularization and application mode for the integration of residential buildings and solar energy. Additionally, this study presents applicable solutions using the transformation-based design method to expand the functions of STCs through the integrated design of STCs and GRBs, thus laying a strong theoretical foundation for promoting the integrated design of solar water heaters and GRBs.
{"title":"Transformation-based design method for the integration of green residential buildings and solar thermal collectors","authors":"Ruozhu Wang, Ruting Ma, Y. Qian, W. Tian","doi":"10.20937/rica.54466","DOIUrl":"https://doi.org/10.20937/rica.54466","url":null,"abstract":"This study investigates integrated application of solar thermal collectors (STCs), as green renewable energy, on the design of green residential buildings (GRBs). With the gradual increase of residential buildings, the use of solar thermal energy has be- come the main popularization and application mode for the integration of residential buildings and solar energy. Additionally, this study presents applicable solutions using the transformation-based design method to expand the functions of STCs through the integrated design of STCs and GRBs, thus laying a strong theoretical foundation for promoting the integrated design of solar water heaters and GRBs.","PeriodicalId":375092,"journal":{"name":"Revista Internacional de Contaminaciónn Ambiental","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131381338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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