{"title":"Study on Mix Proportion Design Procedure for Super-high Cementitious RCC with Stone Powder Replacement","authors":"Y. Aosaka, Shoji Tsutsui, T. Miki","doi":"10.3151/jact.21.123","DOIUrl":"https://doi.org/10.3151/jact.21.123","url":null,"abstract":"","PeriodicalId":14868,"journal":{"name":"Journal of Advanced Concrete Technology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43354242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Qin Zhang, Nai-Hao Zheng, Wenjin Li, Xing fa Gu, Rong Liu
{"title":"Study on the Axial Load Response of RC Columns Confined by CTRC Subjected to Dry-Wet Cycles","authors":"Qin Zhang, Nai-Hao Zheng, Wenjin Li, Xing fa Gu, Rong Liu","doi":"10.3151/jact.21.107","DOIUrl":"https://doi.org/10.3151/jact.21.107","url":null,"abstract":"","PeriodicalId":14868,"journal":{"name":"Journal of Advanced Concrete Technology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43764905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Cyclic Behavior of Interfaces for Seismically Retrofitted RC Buildings","authors":"Taizo Yamada, Y. Takase, T. Abe","doi":"10.3151/jact.21.92","DOIUrl":"https://doi.org/10.3151/jact.21.92","url":null,"abstract":"","PeriodicalId":14868,"journal":{"name":"Journal of Advanced Concrete Technology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43224233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Analysis of Non-uniform Local Strain in Corroded Reinforcing Bar in Concrete using Digital Image Correlation","authors":"Haoyu Peng, Kumar Avadh, K. Nagai","doi":"10.3151/jact.21.42","DOIUrl":"https://doi.org/10.3151/jact.21.42","url":null,"abstract":"","PeriodicalId":14868,"journal":{"name":"Journal of Advanced Concrete Technology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48178046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Nishiwaki, Koshi Shimizu, T. Tanabe, D. Gardner, R. Maddalena
Although numerous studies have proven the effectiveness of self-healing technologies in concrete, its practical application is limited to only few trials. One of the reasons lies in the lack of self-healing in-situ non-destructive evaluation methods as opposed to invasive and extensive laboratory testing. In this study, a novel Terahertz (THz) wave imaging technique is proposed as a simple, non-destructive, and non-contact measurement methodology to quantitatively evaluate the self-healing effectiveness of cementitious materials. Experiments were conducted in fiber-reinforced cementitious composites (FRCC), which confirmed self-healing performance based on a combination of stimulated autogenous and autonomous healing by using supplementary cementitious materials (FRCC), and PVA fibers; the self-healing index was also calculated by using novel THz wave measurement and compared with existing evaluation methods. Simultaneously, sorptivity test and microstructural characterization on damaged and healed specimens were conducted as the conventional methods. As a result, the proposed THz imaging successfully quantified the self-healing performance on cementitious samples. Also, a correlation between the recovery rate (cracked/healed) measured by sorptivity test and THz wave imaging was defined.
{"title":"Terahertz (THz) Wave Imaging in Civil Engineering to Assess Self-Healing of Fiber-Reinforced Cementitious Composites (FRCC)","authors":"T. Nishiwaki, Koshi Shimizu, T. Tanabe, D. Gardner, R. Maddalena","doi":"10.3151/jact.21.58","DOIUrl":"https://doi.org/10.3151/jact.21.58","url":null,"abstract":"Although numerous studies have proven the effectiveness of self-healing technologies in concrete, its practical application is limited to only few trials. One of the reasons lies in the lack of self-healing in-situ non-destructive evaluation methods as opposed to invasive and extensive laboratory testing. In this study, a novel Terahertz (THz) wave imaging technique is proposed as a simple, non-destructive, and non-contact measurement methodology to quantitatively evaluate the self-healing effectiveness of cementitious materials. Experiments were conducted in fiber-reinforced cementitious composites (FRCC), which confirmed self-healing performance based on a combination of stimulated autogenous and autonomous healing by using supplementary cementitious materials (FRCC), and PVA fibers; the self-healing index was also calculated by using novel THz wave measurement and compared with existing evaluation methods. Simultaneously, sorptivity test and microstructural characterization on damaged and healed specimens were conducted as the conventional methods. As a result, the proposed THz imaging successfully quantified the self-healing performance on cementitious samples. Also, a correlation between the recovery rate (cracked/healed) measured by sorptivity test and THz wave imaging was defined.","PeriodicalId":14868,"journal":{"name":"Journal of Advanced Concrete Technology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44764998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Crack Resistance under Compressive Stress of Concrete Made Using Granulated Blast-furnace Slag Sand","authors":"Ryota Hashimoto, K. Onoue","doi":"10.3151/jact.21.17","DOIUrl":"https://doi.org/10.3151/jact.21.17","url":null,"abstract":"","PeriodicalId":14868,"journal":{"name":"Journal of Advanced Concrete Technology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44941107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper aims to verify a space-averaged electric filed simulation, where the whole surfaces of reinforcing bars are blended into the 3D finite volume for identifying the electric potential to drive the macro-cell corrosion of structural concrete. Experimental verification is conducted with transparent pseudo-concrete, which has chemical pore-solutions similar to those of concrete, and with which the location of anodic poles accompanying brownish rusts and the cathodic ones surrounded by hydrogen bubbles may be visually identified. The proposed electro-chemical analysis platform to be integrated with ion transport and equilibrium is adopted for full consistency with dispersed reinforcing bars. Global macro-cell corrosions of tunnel mockup and reinforcement layers induced by electric current leakage are verified quantitatively with dispersed multi-ion concentration as well as corrosion profile.
{"title":"Space Averaging of Electric Field accompanying Corrosion of Reinforcement and its Verification by Pseudo-Concrete","authors":"Zhao Wang, Koichi Maekawa, Fuyuan Gong","doi":"10.3151/jact.21.25","DOIUrl":"https://doi.org/10.3151/jact.21.25","url":null,"abstract":"This paper aims to verify a space-averaged electric filed simulation, where the whole surfaces of reinforcing bars are blended into the 3D finite volume for identifying the electric potential to drive the macro-cell corrosion of structural concrete. Experimental verification is conducted with transparent pseudo-concrete, which has chemical pore-solutions similar to those of concrete, and with which the location of anodic poles accompanying brownish rusts and the cathodic ones surrounded by hydrogen bubbles may be visually identified. The proposed electro-chemical analysis platform to be integrated with ion transport and equilibrium is adopted for full consistency with dispersed reinforcing bars. Global macro-cell corrosions of tunnel mockup and reinforcement layers induced by electric current leakage are verified quantitatively with dispersed multi-ion concentration as well as corrosion profile.","PeriodicalId":14868,"journal":{"name":"Journal of Advanced Concrete Technology","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135833305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"X-ray Microtomography Study on the Cemented Structure of Cemented Granular Materials","authors":"Wei-chang Qin, Feng Jin, Siyuan Yang, Duruo Huang","doi":"10.3151/jact.21.1","DOIUrl":"https://doi.org/10.3151/jact.21.1","url":null,"abstract":"","PeriodicalId":14868,"journal":{"name":"Journal of Advanced Concrete Technology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45413561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. Maruyama, T. Kondo, S. Sawada, P. Halodová, Alica Fedoriková, Takahiro Ohkubo, Kenta Murakami, Takafumi Igari, E. T. Rodriguez, Kiyoteru Suzuki
{"title":"Radiation-induced Alteration of Meta-chert","authors":"I. Maruyama, T. Kondo, S. Sawada, P. Halodová, Alica Fedoriková, Takahiro Ohkubo, Kenta Murakami, Takafumi Igari, E. T. Rodriguez, Kiyoteru Suzuki","doi":"10.3151/jact.20.760","DOIUrl":"https://doi.org/10.3151/jact.20.760","url":null,"abstract":"","PeriodicalId":14868,"journal":{"name":"Journal of Advanced Concrete Technology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45313078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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