Case Studies in Construction Materials最新文献_第6页

Tailoring the hardening performance and microstructure of calcium aluminate cement through carbonation curing

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2024-12-23 DOI: 10.1016/j.cscm.2024.e04150

Huaqiang Sun , Changfan Cai , Tianzhu Lin , Jingzhen Huang , Shusen Zhuang , Congcong Ma

{"title":"Tailoring the hardening performance and microstructure of calcium aluminate cement through carbonation curing","authors":"Huaqiang Sun , Changfan Cai , Tianzhu Lin , Jingzhen Huang , Shusen Zhuang , Congcong Ma","doi":"10.1016/j.cscm.2024.e04150","DOIUrl":"10.1016/j.cscm.2024.e04150","url":null,"abstract":"<div><div>The hydration of calcium aluminate cement (CAC) generates metastable phases such as CAH<sub>10</sub> and C<sub>2</sub>AH<sub>8</sub>, which subsequently transform into more stable products, leading to a reduction in strength and causing volumetric instability. The present study aims to alter the hydration pathway with improved mechanical strength and volume stability of CAC by carbonation curing with different temperatures and durations. The mechanical strength, dimensional changes, carbonation products, and microstructure were comprehensively investigated. The results reveal that carbonation curing converts the metastable hydration products C<sub>2</sub>AH<sub>8</sub> and CAH<sub>10</sub> of CAC directly into AH<sub>3</sub> and calcium carbonate, primarily in the forms of amorphous CaCO<sub>3</sub>, calcite, and aragonite. Suitable early carbonation curing and subsequent water curing could increase CO<sub>2</sub> uptake and carbonation depth, reduce total porosity, and optimize the pore structure. CAC subjected to 4 hours of carbonation curing at 20 °C exhibited excellent volume stability and significant enhancement of compressive strength up to 106 MPa with 90 days of subsequent water curing. A shorter carbonation duration leveraged the synergy between carbonation reactions and subsequent hydration to enhance the macroscopic performance of CAC significantly. This study offers new insights into innovative methods for mitigating the unstable transformation of hydrates in CAC by effectively utilizing and sequestering CO<sub>2</sub>.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"22 ","pages":"Article e04150"},"PeriodicalIF":6.5,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of the modified expanded perlite materials on magnesium phosphate cement-based fireproof mortars: Mechanical property, thermal conductivity and microstructure

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2024-12-22 DOI: 10.1016/j.cscm.2024.e04140

Chen Fang , Jing Wen , Ying Li , Lei Liu , Yang Shi , Yuchao Lyu , Baodong Xing , Jianming Yang

{"title":"Effects of the modified expanded perlite materials on magnesium phosphate cement-based fireproof mortars: Mechanical property, thermal conductivity and microstructure","authors":"Chen Fang , Jing Wen , Ying Li , Lei Liu , Yang Shi , Yuchao Lyu , Baodong Xing , Jianming Yang","doi":"10.1016/j.cscm.2024.e04140","DOIUrl":"10.1016/j.cscm.2024.e04140","url":null,"abstract":"<div><div>This paper focuses on the expanded perlite modifications and their effects on the properties of magnesium phosphate cement-based fireproof mortars. Silane impregnation solution, water glass, and stearic acid were employed for surface hydrophobicity modification of the expanded perlite particles. Eight types of the magnesium phosphate cement–based fireproof mortars were fabricated with and without various modified expanded perlite particles. The magnesium phosphate cement–based fireproof mortar morphology was characterized by a scanning electron microscope–energy–dispersive X–ray spectroscopy. The weight loss and chemical compositions of each magnesium phosphate cement–based fireproof mortar were visually analyzed by thermogravimetry and X–ray diffraction, respectively. Analysis reveals that the silane impregnation solution has a greater effect than stearic acid and water glass on the surface modification of the expanded perlite particles. The magnesium phosphate cement–based fireproof mortar prepared with the expanded perlite particles modified by the silane impregnation solution has better properties in terms of compressive strength and fire resistance than that by others, regardless of hydration age. In addition, the findings, in terms of mortar micrographs, thermogravimetry and chemical components, can contribute to explaining the differences observed in the performance of various magnesium phosphate cement–based fireproof mortars.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"22 ","pages":"Article e04140"},"PeriodicalIF":6.5,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recyclability of vernacular adobes with high chalk content in the context of sustainable construction

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2024-12-22 DOI: 10.1016/j.cscm.2024.e04145

Guillaume Polidori , Adrien Aras-Gaudry , Fabien Beaumont , Fabien Bogard , Sébastien Murer , Ouahcene Nait-Rabah , Christophe Bliard , Gilles Fronteau , Erwan Hamard

{"title":"Recyclability of vernacular adobes with high chalk content in the context of sustainable construction","authors":"Guillaume Polidori , Adrien Aras-Gaudry , Fabien Beaumont , Fabien Bogard , Sébastien Murer , Ouahcene Nait-Rabah , Christophe Bliard , Gilles Fronteau , Erwan Hamard","doi":"10.1016/j.cscm.2024.e04145","DOIUrl":"10.1016/j.cscm.2024.e04145","url":null,"abstract":"<div><div>The contemporary construction industry faces significant challenges, necessitating a response to multiple issues: reducing material resource consumption, minimizing construction waste, transitioning to carbon-neutral building methods, and fostering a circular, local, and inclusive economy. The recycling of raw earth adobes, an ancient architectural practice still employed today, appears to meet all these criteria. This study addresses the potential alterations in the physical properties of high chalk content adobes undergoing multiple cycles of reconstitution. The investigated primary adobes were collected from a recently demolished 19th century barn near Épernay, in the Champagne region located in northeastern France. During the recycling process, the bricks underwent dry crushing, wetting, mixing, molding, and drying. Careful attention was given to reproducibility through controlled water content and manual compaction techniques. Next, physical, mechanical, and thermal tests were performed. The findings indicate that the mechanical and thermal properties remain consistent over several recycling cycles. For example, mechanical tests across three recycling cycles demonstrated that the normalized peak compressive stress is barely affected. In complement, thermal conductivity and diffusivity measurements showed minimal variation across cycles, confirming that recycling did not impact these thermal parameters. The substitutability of raw earth, defined as the ability of the recycled material to reach levels of performance comparable to the original, is evidently robust. In view of these promising results, future research works should explore the possibility of combining raw earth from recycled adobes with additives such as plant-based ash, with the potential goal of improving its durability, mechanical strength, and moisture resistance.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"22 ","pages":"Article e04145"},"PeriodicalIF":6.5,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rheological benefits of biomass fly ash as filler replacement in cement-based materials

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2024-12-21 DOI: 10.1016/j.cscm.2024.e04133

Yannick Vanhove, Joella Grâce Dossa, Jonathan Page, Chafika Djelal

{"title":"Rheological benefits of biomass fly ash as filler replacement in cement-based materials","authors":"Yannick Vanhove, Joella Grâce Dossa, Jonathan Page, Chafika Djelal","doi":"10.1016/j.cscm.2024.e04133","DOIUrl":"10.1016/j.cscm.2024.e04133","url":null,"abstract":"<div><div>Biomass Fly Ash (BFA) represents a significant waste, which needs to find a new way of recovery. Their use as replacement for cement remains difficult because these ashes are generally non-reactive and lead to low resistance for cementitious materials. This study explores the feasibility of valorizing these biomass ashes as replacement for limestone filler, generally used in concrete to improve rheological stability of mixtures. An experimental program, based on a progressive replacement of limestone filler (LF) with biomass ash, is proposed. The rheological behavior of BFA were studied from a Blast Furnace Slag cement (BFS) and an ordinary Portland cement (OPC). The incorporation of BFA in replacement of LF increase the non-linearity of flow behavior depending of the shear rate intensity. A loss of workability with BFA is observed, associated to the difference in water demand between BFA and LF. In addition, BFA-based mixtures present more shear thinning behavior in comparison with the limestone filler. This study provides a rheological basis for functional aspects of a possible replacement of limestone filler by BFA in the future and demonstrates the use of BFA can improve working performance of cement-based materials.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"22 ","pages":"Article e04133"},"PeriodicalIF":6.5,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization, activation and reactivity – A case study of Nordic volcanic materials for application as Supplementary Cementitious Materials

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2024-12-21 DOI: 10.1016/j.cscm.2024.e04096

Amrita Hazarika , Liming Huang , Sigurdur Erlingsson , Klaartje de Weerdt , Ingemar Löfgren , Sahar Iftikhar , Arezou Babaahmadi

{"title":"Characterization, activation and reactivity – A case study of Nordic volcanic materials for application as Supplementary Cementitious Materials","authors":"Amrita Hazarika , Liming Huang , Sigurdur Erlingsson , Klaartje de Weerdt , Ingemar Löfgren , Sahar Iftikhar , Arezou Babaahmadi","doi":"10.1016/j.cscm.2024.e04096","DOIUrl":"10.1016/j.cscm.2024.e04096","url":null,"abstract":"<div><div>Despite their historical importance, the widespread use of volcanic materials as Supplementary Cementitious Materials faces challenges. There exists a knowledge gap relating the properties such as chemical compositions, mineralogy, physical attributes (effective particle size distribution, and specific surface areas) with reactivity. The current study investigates the correlation between noted properties when physical properties are altered by mechanochemical treatments applied to four unique volcanic materials with diverse mineralogy including Albite, Anorthite, Andesine, Oligoclase and Olivine. The alterations in these properties are then linked to changes in the reactivity levels of volcanic materials. The key findings emphasize that grinding volcanic materials for up to 20 min can result in significant improvements. The following outlines the most notable changes observed from 5 min to 20 min: a decrease in D50 from 37 <em>μ</em>m to 9 <em>μ</em>m, an increase in surface area from 4 m<sup>2</sup>/g to 13 m<sup>2</sup>/g, and a rise in average degree of amorphization of the four volcanic materials from 70 % to 83 %. Progressive increases in reactivity levels were observed when extending the milling time from 5 to 20 min, with the most significant increase showing a change from 56 J/g to 350 J/g SCM, as measured with the MR3 reactivity test. X-ray diffraction analyses reveal the detection of new phases like Magnetite and Iron with prolonged mechanochemical activation, and the reaction of mineral phases over time, in MR3 mixes.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"22 ","pages":"Article e04096"},"PeriodicalIF":6.5,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Superior synergy of strength and ductility in carbon steel by thermomechanical processing

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2024-12-21 DOI: 10.1016/j.cscm.2024.e04146

Fatemeh Talebi, Roohollah Jamaati, Seyed Jamal Hosseinipour

引用次数: 0

Property and applicability of shield grouting material: State of the art and perspectives

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2024-12-20 DOI: 10.1016/j.cscm.2024.e04137

Fei Sha, Naiyin Yang, Quanfeng Wang, Fanghao Liu, Xiaochen Fan

{"title":"Property and applicability of shield grouting material: State of the art and perspectives","authors":"Fei Sha, Naiyin Yang, Quanfeng Wang, Fanghao Liu, Xiaochen Fan","doi":"10.1016/j.cscm.2024.e04137","DOIUrl":"10.1016/j.cscm.2024.e04137","url":null,"abstract":"<div><div>Synchronous grouting is one of the most important methods to prevent surface settlement and water seepage accidents in shield tunnel construction. Various compositions and properties of shield grouting materials are required for different adverse geological conditions. This study provides an overview of composition, typical engineering performance, influence factors of shield grouting materials based on the grouting treatment requirements of disadvantageous geological conditions. The shield synchronous cementitious grouting slurry is classified into two categories i.e., single liquid slurry, double liquid slurry. The former is suitable for relatively stable formations with low requirements for setting time and early strength, whereas the latter finds application in water-rich strata due to its rapid setting time and superior early strength. The fundamental characteristic requirements of shield grout include working properties, mechanical properties, mineral composition and micro-structure characteristics, etc. Water-binder, binder-sand and bentonite-water ratios are the direct factors of slurry performance. Properties of slurry are controlled by adjusting the contents of cement, lime, fly ash, sand, bentonite and admixture. How to inject shield grouting material behind wall is an important research issue. The construction technologies including synchronous grouting, secondary grouting, etc, were summarized. In addition, two suggestions are put forward for the future research directions of shield tunnel grouting. One is to select suitable grout type and ratio for different grouting environments and requirements, the other is to improve the existing grouting materials with more superior performance and better economic benefits.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"22 ","pages":"Article e04137"},"PeriodicalIF":6.5,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental and simulation evaluation of sulfate attack behavior of concrete in sulfate-rich and stray current environment

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2024-12-20 DOI: 10.1016/j.cscm.2024.e04144

Yi Xu , Qian Chen , Zhisheng Lv , Li Cao , Yichao Chen , Sheng Jiang , Zhengyu Zhu , Hongqiang Chu , Linhua Jiang

{"title":"Experimental and simulation evaluation of sulfate attack behavior of concrete in sulfate-rich and stray current environment","authors":"Yi Xu , Qian Chen , Zhisheng Lv , Li Cao , Yichao Chen , Sheng Jiang , Zhengyu Zhu , Hongqiang Chu , Linhua Jiang","doi":"10.1016/j.cscm.2024.e04144","DOIUrl":"10.1016/j.cscm.2024.e04144","url":null,"abstract":"<div><div>The reinforced concrete structures within subway projects are often in a complex environment surrounded by the track's stray current and groundwater containing sulfate and chloride ions. These factors can contribute to concrete deterioration. The effects of current intensity and sulfate concentration on the sulfate resistance of concrete in subway engineering are investigated. The results indicate that the heightened current intensity can expedite sulfate ions migration, leading to the formation of swelling hydration products and pore refinement. Despite elevated sulfate concentration can also stimulate hydration, its effectiveness is not on par with that of increased current intensity. Moreover, phase analysis demonstrates a diminish in diffraction peak intensity for calcium hydroxide due to current, indicating the decomposition of calcium hydroxide. Pore analysis reveals that the current reduces harmful pores and improves concrete compactness and durability. Finite element analysis provides a basis for evaluating concrete's resistance to sulfate attacks in subway engineering.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"22 ","pages":"Article e04144"},"PeriodicalIF":6.5,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of sugarcane bagasse ash on eco-friendly blended cement production: Physicochemical, mechanical, and microstructure properties

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2024-12-19 DOI: 10.1016/j.cscm.2024.e04141

Safiki Ainomugisha , Nathan Kibwami , Wesonga Racheal , Eunice Naigaga Adubango , Moses J Matovu , Musa Manga

{"title":"Effect of sugarcane bagasse ash on eco-friendly blended cement production: Physicochemical, mechanical, and microstructure properties","authors":"Safiki Ainomugisha , Nathan Kibwami , Wesonga Racheal , Eunice Naigaga Adubango , Moses J Matovu , Musa Manga","doi":"10.1016/j.cscm.2024.e04141","DOIUrl":"10.1016/j.cscm.2024.e04141","url":null,"abstract":"<div><div>The study presents the effect of different mixing proportions of locally generated SCBA grown in African tropical areas of Uganda on cement's physicochemical, mechanical, and microstructural properties as supplementary cementitious material alongside clinker. SCBA was pretreated by: (i) calcination plus grinding and (ii) grinding only. Blended cement was made using 7 % - 35 % SCBA and 4 % gypsum by weight of cement and then characterized. Processing locally generated SCBA increased the pozzolanic oxides’ content (SiO<sub>2</sub>+Al<sub>2</sub>O<sub>3</sub>+Fe<sub>2</sub>O<sub>3</sub>) to about 92.85 %. Use of up to 28 % SCBA (65 % clinker proportion) produced cement with satisfactory setting times, soundness, normal consistency, chemical requirements, and cement strength as per ASTM C595 for type P. The optimum mix was 14 % SCBA with a strength improvement of 27.7 % at 28 days of curing compared to the control. Thermal, chemical bond, and microstructure analysis confirmed that pre-treated SCBA contributes SiO<sub>2</sub> which reacts with the portlandite produced in clinker hydration to form calcium silicate hydrate (C-S-H) gels for improved performance properties. Therefore, the study findings suggest that the use of pre-treated locally generated SCBA could lower the clinker-to-cement ratio of OPC from 0.95 to 0.65 and the heavy reliance on expensive imported clinker in producing blended cement.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"22 ","pages":"Article e04141"},"PeriodicalIF":6.5,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stress-strain relationship of steel fiber reinforced fully recycled coarse/fine aggregate concrete under cyclic loading

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2024-12-19 DOI: 10.1016/j.cscm.2024.e04139

Shuqi Guo , Yahong Ding , Ping Xu , Jun Wu , Jiuwen Bao

{"title":"Stress-strain relationship of steel fiber reinforced fully recycled coarse/fine aggregate concrete under cyclic loading","authors":"Shuqi Guo , Yahong Ding , Ping Xu , Jun Wu , Jiuwen Bao","doi":"10.1016/j.cscm.2024.e04139","DOIUrl":"10.1016/j.cscm.2024.e04139","url":null,"abstract":"<div><div>This study examines the stress-strain behavior of recycled concrete subjected to various recycled material mixture systems and varying steel fiber (SF) volume contents. Uniaxial cyclic loading tests were conducted to assess the failure modes, stress-strain curves, axial compressive strength, and residual strains. The findings indicate that incorporating recycled materials shift the failure mode from vertical splitting to oblique shear and reduces the stress-strain curve's ascending slopes and axial compressive strength. Specifically, the strength of fully recycled aggregate concrete experienced the greatest reduction of 26.27 % relative to natural concrete, and only a 2.4 % reduction compared to fully recycled fine aggregate concrete (FRFAC). The inclusion of SF significantly enhances the cyclic compression resistance and ductility of recycled concrete, increasing both the cycle count and the maximum cumulative residual strain. At a fiber content of 1.5 %, FRFAC's cycle count increased by 20 compared to the control, and the maximum cumulative residual strain rose from 0.86 to 10.38. The relationship between residual strain and unloaded/reloaded strain is described by introducing recycled material coefficient and SF characteristic parameter. Based on the test data, the unloading and reloading equations proposed, and the damage evolution equation including residual strain proposed on the basis of stiffness degradation. A constitutive model for SF reinforced fully recycled coarse/fine aggregate concrete is developed, capable of characterizing the effects of different recycled materials and SF content. This model accurately predicts the unloading/reloading path, residual strain progression, and damage evolution.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"22 ","pages":"Article e04139"},"PeriodicalIF":6.5,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0