Pub Date : 2023-08-28DOI: 10.1080/21650373.2023.2250786
Yu Zhang, O. Çopuroğlu
{"title":"Effect of Al2O3 content in slag on the relationship between slag reactivity and carbonation resistance","authors":"Yu Zhang, O. Çopuroğlu","doi":"10.1080/21650373.2023.2250786","DOIUrl":"https://doi.org/10.1080/21650373.2023.2250786","url":null,"abstract":"","PeriodicalId":48521,"journal":{"name":"Journal of Sustainable Cement-Based Materials","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49636562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-25DOI: 10.1080/21650373.2023.2248977
Jinhui Tang, Shuai Xiao, Jia-le Huang, Kaiwei Liu, Fangyu Han, Chang Gao, J. Xu, Jiaping Liu
{"title":"Investigation on the reinforcing of cementitious materials by nano-hydroxyapatites","authors":"Jinhui Tang, Shuai Xiao, Jia-le Huang, Kaiwei Liu, Fangyu Han, Chang Gao, J. Xu, Jiaping Liu","doi":"10.1080/21650373.2023.2248977","DOIUrl":"https://doi.org/10.1080/21650373.2023.2248977","url":null,"abstract":"","PeriodicalId":48521,"journal":{"name":"Journal of Sustainable Cement-Based Materials","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47754786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-24DOI: 10.1080/21650373.2023.2240359
Jiang Chang, Jianjun Hu, T. Pei, Zhankui Zhu, Yongsheng Zhao, Shixiang Xie, Jian Xun, Yuzhang Liu, Zhang Jun
Abstract An innovative application of the fiber reinforced engineered cementitious composite (ECC) in thermal insulation wall is presented in this paper. Special focuses are paid for the purpose of eliminating bond failure between the structural layer, thermal insulation layer and surface protective layer, and enhancing cracking resistance of the surface protective layer. ECC with characteristics of low drying shrinkage (LSECC), strain-hardening and multiple cracking was used as surface protective material in the wall. The test results show that uniformly distributed steel wires crossing the thermal insulation layer at an inclination angle to the direction of horizontal direction of the wall and embedded in the structural concrete layer with certain length can provide sufficient bond strength of structural layer, thermal insulation layer and surface protective layer. Tensile test results on LSECC used in the surface protective layer of the wall show that LSECC can provide sufficient tensile strain capacity to adsorb the deformation induced by temperature change, material shrinkage and mechanical loads. Meanwhile, high crack opening control ability and fine crack opening is expected as well during service.
{"title":"Application of low drying shrinkage ECC in the protection layer of thermal insulation wall","authors":"Jiang Chang, Jianjun Hu, T. Pei, Zhankui Zhu, Yongsheng Zhao, Shixiang Xie, Jian Xun, Yuzhang Liu, Zhang Jun","doi":"10.1080/21650373.2023.2240359","DOIUrl":"https://doi.org/10.1080/21650373.2023.2240359","url":null,"abstract":"Abstract An innovative application of the fiber reinforced engineered cementitious composite (ECC) in thermal insulation wall is presented in this paper. Special focuses are paid for the purpose of eliminating bond failure between the structural layer, thermal insulation layer and surface protective layer, and enhancing cracking resistance of the surface protective layer. ECC with characteristics of low drying shrinkage (LSECC), strain-hardening and multiple cracking was used as surface protective material in the wall. The test results show that uniformly distributed steel wires crossing the thermal insulation layer at an inclination angle to the direction of horizontal direction of the wall and embedded in the structural concrete layer with certain length can provide sufficient bond strength of structural layer, thermal insulation layer and surface protective layer. Tensile test results on LSECC used in the surface protective layer of the wall show that LSECC can provide sufficient tensile strain capacity to adsorb the deformation induced by temperature change, material shrinkage and mechanical loads. Meanwhile, high crack opening control ability and fine crack opening is expected as well during service.","PeriodicalId":48521,"journal":{"name":"Journal of Sustainable Cement-Based Materials","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41819441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-23DOI: 10.1080/21650373.2023.2248487
Hyunuk Kang, Sungjin Jung, Junhyeok Jung, Jungwon Park, Jun-Boum Park, Juhyuk Moon
Although it is one of main cement phases, the reactivity of tetracalcium aluminoferrite (C4AF) has not been fully understood especially under the use of grinding agent. In this study, the crystallographic variations due to the use of diethanol isopropanolamine (DEIPA) and resulting hydration characteristics of iron-rich C4A0.6F1.4 (f-C4AF) and idealized C4A0.8F1.2 (i-C4AF) were investigated. Substantially enhanced reactivity of f-C4AF was confirmed due to the state variation of Fe atom in C4AF from Fe2+ to Fe3+ which facilitates the formation of Fe-bearing phases of C3FH6, Fe-AFm and FH3. Meanwhile, the degree of hydration of i-C4AF had not been substantially improved but showed similar reaction only with a large amount of DEIPA (from 0.1% to 0.3%). It was experimentally validated that the reactivity of C4AF is controllable with the use of DEIPA which can lead to develop sustainable cement such as ferrite rich Portland cement.
{"title":"Investigation of the effect of diethanol isopropanolamine on ferrite phase","authors":"Hyunuk Kang, Sungjin Jung, Junhyeok Jung, Jungwon Park, Jun-Boum Park, Juhyuk Moon","doi":"10.1080/21650373.2023.2248487","DOIUrl":"https://doi.org/10.1080/21650373.2023.2248487","url":null,"abstract":"Although it is one of main cement phases, the reactivity of tetracalcium aluminoferrite (C4AF) has not been fully understood especially under the use of grinding agent. In this study, the crystallographic variations due to the use of diethanol isopropanolamine (DEIPA) and resulting hydration characteristics of iron-rich C4A0.6F1.4 (f-C4AF) and idealized C4A0.8F1.2 (i-C4AF) were investigated. Substantially enhanced reactivity of f-C4AF was confirmed due to the state variation of Fe atom in C4AF from Fe2+ to Fe3+ which facilitates the formation of Fe-bearing phases of C3FH6, Fe-AFm and FH3. Meanwhile, the degree of hydration of i-C4AF had not been substantially improved but showed similar reaction only with a large amount of DEIPA (from 0.1% to 0.3%). It was experimentally validated that the reactivity of C4AF is controllable with the use of DEIPA which can lead to develop sustainable cement such as ferrite rich Portland cement.","PeriodicalId":48521,"journal":{"name":"Journal of Sustainable Cement-Based Materials","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2023-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44608103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-22DOI: 10.1080/21650373.2023.2246068
S. Rengaraju, Radhakrishna G. Pillai
The performance of quenched and self-tempered (QST) steel bars embedded in concretes with Limestone calcined clay cement (LC3), fly ash (70% OPC and 30%fly ash – PFA), and traditional OPC was assessed in severe chloride environments. Additionally, the performance of commercially available, calcium nitrite-based inhibitors in the three binder systems was also evaluated. The specimens were subjected to an alternate wet-dry cycle using the ASTM G109 test method. The findings show that LC3 concrete performs better than the OPC and PFA systems with and without inhibitors. Furthermore, when the surface resistivity, ρ, is more than 37 kΩ.cm, the concrete has high ionic resistance and the macrocell current across the two rebars could not be established as described in ASTM G109 test method. This highlights the limitations of the ASTM G109 test method and the need for more sophisticated testing methods for assessing steel corrosion in highly resistive cementitious systems.
{"title":"Long-term corrosion performance and monitoring for service life estimation of LC3 concrete systems","authors":"S. Rengaraju, Radhakrishna G. Pillai","doi":"10.1080/21650373.2023.2246068","DOIUrl":"https://doi.org/10.1080/21650373.2023.2246068","url":null,"abstract":"The performance of quenched and self-tempered (QST) steel bars embedded in concretes with Limestone calcined clay cement (LC3), fly ash (70% OPC and 30%fly ash – PFA), and traditional OPC was assessed in severe chloride environments. Additionally, the performance of commercially available, calcium nitrite-based inhibitors in the three binder systems was also evaluated. The specimens were subjected to an alternate wet-dry cycle using the ASTM G109 test method. The findings show that LC3 concrete performs better than the OPC and PFA systems with and without inhibitors. Furthermore, when the surface resistivity, ρ, is more than 37 kΩ.cm, the concrete has high ionic resistance and the macrocell current across the two rebars could not be established as described in ASTM G109 test method. This highlights the limitations of the ASTM G109 test method and the need for more sophisticated testing methods for assessing steel corrosion in highly resistive cementitious systems.","PeriodicalId":48521,"journal":{"name":"Journal of Sustainable Cement-Based Materials","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43529004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-13DOI: 10.1080/21650373.2023.2243462
Xingliang Yao, Hua Dong, Hantao Liu, Yongping Qu, Wenlong Wang
Abstract Ferric-rich sulfoaluminate cement (FR-SAC) prepared from solid waste has attracted more and more attention. However, the mineral compositions of solid waste-based FR-SAC clinkers are changeful due to the complex composition of raw materials. In this study, the influences of mineral composition and impurities in solid wastes on the mineral formation of FR-SAC clinker were investigated. The results showed that mullite in fly ash and sodium aluminosilicate in red mud did not decompose but easily reacted with other raw materials to form FR-SAC clinker. Al2(SO4)3 in galvanic sludge decomposed before the formation reaction of FR-SAC clinker. The insufficient SO2 involved in the reaction should be noted. Besides, Na2O and K2O promoted the decomposition of CaSO4 and the formation of C4AF. Most of the TiO2 formed CaTiO3, resulting in the increase of gehlenite and the decrease of C2S and CaSO4. These results can reduce the error when these solid wastes were used to prepare FR-SAC.
{"title":"Preparation of ferric-rich sulfoaluminate cement from solid wastes and characterization of its mineral formation process","authors":"Xingliang Yao, Hua Dong, Hantao Liu, Yongping Qu, Wenlong Wang","doi":"10.1080/21650373.2023.2243462","DOIUrl":"https://doi.org/10.1080/21650373.2023.2243462","url":null,"abstract":"Abstract Ferric-rich sulfoaluminate cement (FR-SAC) prepared from solid waste has attracted more and more attention. However, the mineral compositions of solid waste-based FR-SAC clinkers are changeful due to the complex composition of raw materials. In this study, the influences of mineral composition and impurities in solid wastes on the mineral formation of FR-SAC clinker were investigated. The results showed that mullite in fly ash and sodium aluminosilicate in red mud did not decompose but easily reacted with other raw materials to form FR-SAC clinker. Al2(SO4)3 in galvanic sludge decomposed before the formation reaction of FR-SAC clinker. The insufficient SO2 involved in the reaction should be noted. Besides, Na2O and K2O promoted the decomposition of CaSO4 and the formation of C4AF. Most of the TiO2 formed CaTiO3, resulting in the increase of gehlenite and the decrease of C2S and CaSO4. These results can reduce the error when these solid wastes were used to prepare FR-SAC.","PeriodicalId":48521,"journal":{"name":"Journal of Sustainable Cement-Based Materials","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2023-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48806408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-12DOI: 10.1080/21650373.2023.2243484
Fengjuan Wang, Jin-yang Jiang, Aoning Zhang, Liguo Wang, Shiyu Sui
Subgrade is an essential factor for the service life of highways and railways, especially the sulfate attack of subgrade made of saline soil. Therefore, it is necessary to improve the transport property of subgrade. In this study, sulfate transport of cementitious materials-solidified saline soil was assessed. Firstly, factors affecting sulfate transport were characterized in natural soil. Furthermore, fly ash and lime were implemented to prepare a new kind of improved soil. By analyzing the microstructure development, influence of fly ash and lime on sulfate transport was investigated and the improved mix proportion was addressed. Finally, the last section focused on the mechanism for sulfate resistance of the soil. Raw materials, phase assemblage improvement, and pore structure refinement caused by filler effect and pozzolanic reaction effect of fly ash were the main reasons for the sulfate resistance increase. This study is helpful for the service life improvement of highways and railways.
{"title":"Sulfate transport assessment of cementitious materials-solidified saline soil","authors":"Fengjuan Wang, Jin-yang Jiang, Aoning Zhang, Liguo Wang, Shiyu Sui","doi":"10.1080/21650373.2023.2243484","DOIUrl":"https://doi.org/10.1080/21650373.2023.2243484","url":null,"abstract":"Subgrade is an essential factor for the service life of highways and railways, especially the sulfate attack of subgrade made of saline soil. Therefore, it is necessary to improve the transport property of subgrade. In this study, sulfate transport of cementitious materials-solidified saline soil was assessed. Firstly, factors affecting sulfate transport were characterized in natural soil. Furthermore, fly ash and lime were implemented to prepare a new kind of improved soil. By analyzing the microstructure development, influence of fly ash and lime on sulfate transport was investigated and the improved mix proportion was addressed. Finally, the last section focused on the mechanism for sulfate resistance of the soil. Raw materials, phase assemblage improvement, and pore structure refinement caused by filler effect and pozzolanic reaction effect of fly ash were the main reasons for the sulfate resistance increase. This study is helpful for the service life improvement of highways and railways.","PeriodicalId":48521,"journal":{"name":"Journal of Sustainable Cement-Based Materials","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2023-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48474280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-11DOI: 10.1080/21650373.2023.2243477
Yuguo Zhang, Congtao Sun, Peng Zhang, Ming Sun, Yuanjie Geng, Maomi Zhao, Liang Fan, Nazhen Liu, J. Duan
The effect of calcium silicate hydrate (C-S-H) on chloride (Cl−) binding and steel corrosion in simulated concrete pore solution (SCPS) was evaluated. The results showed that Cl− absorbed by C-S-H conformed to Freundlich isotherm for 0.1–1.0 M of Cl−. When C-S-H reached equilibrium in saturated Ca(OH)2 solution, its degree of polymerization increased. The high pH is unfavorable for the absorption of Cl− by C-S-H, but favorable for the passivation of steel. The synthetic C-S-H powder contains NO3 −, which prolongs the passivation time of steel, but the presence of silicate is favorable for the formation of a passivation film with good corrosion resistance. The addition of C-S-H promoted the chloride threshold value of steel corrosion and delayed the corrosion development process.
{"title":"Chloride absorption capacity of calcium silicate hydrate (C-S-H) and its effect on steel corrosion in simulated concrete pore solution","authors":"Yuguo Zhang, Congtao Sun, Peng Zhang, Ming Sun, Yuanjie Geng, Maomi Zhao, Liang Fan, Nazhen Liu, J. Duan","doi":"10.1080/21650373.2023.2243477","DOIUrl":"https://doi.org/10.1080/21650373.2023.2243477","url":null,"abstract":"The effect of calcium silicate hydrate (C-S-H) on chloride (Cl−) binding and steel corrosion in simulated concrete pore solution (SCPS) was evaluated. The results showed that Cl− absorbed by C-S-H conformed to Freundlich isotherm for 0.1–1.0 M of Cl−. When C-S-H reached equilibrium in saturated Ca(OH)2 solution, its degree of polymerization increased. The high pH is unfavorable for the absorption of Cl− by C-S-H, but favorable for the passivation of steel. The synthetic C-S-H powder contains NO3 −, which prolongs the passivation time of steel, but the presence of silicate is favorable for the formation of a passivation film with good corrosion resistance. The addition of C-S-H promoted the chloride threshold value of steel corrosion and delayed the corrosion development process.","PeriodicalId":48521,"journal":{"name":"Journal of Sustainable Cement-Based Materials","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43089399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-11DOI: 10.1080/21650373.2023.2243470
F. Gong, Zhao Wang, Liu Yang, Yingjie Ning, Tamon Ueda
Freeze-thaw modification of recycled coarse aggregate (RCA) is capable to remove the attached mortar efficiently, which can promote the usage of such eco-friendly recycled construction materials. To produce natural coarse aggregate (NCA) without introducing additional damage by this method, it is important to know the frost resistance of attached mortar in RCA. This paper presents a mesoscale analysis of mortar deterioration during freeze-thaw modification of RCA. The pore size distribution, pore pressure induced from ice formation, meso-scale constitutive laws are modeled and integrated with the discrete element method—Rigid Body Spring Model. The deformation during FTC, crack patterns and the mechanical behaviors are simulated with three typical types of RCA. Experiment results are also adopted to qualitatively show the effectiveness of such freeze-thaw modification. Finally, an empirical model to calculate the deteriorated mechanical properties of RCA is developed according to the numerical analysis.
{"title":"Mesoscale analysis for mortar deterioration during freeze-thaw modification of recycled coarse aggregate","authors":"F. Gong, Zhao Wang, Liu Yang, Yingjie Ning, Tamon Ueda","doi":"10.1080/21650373.2023.2243470","DOIUrl":"https://doi.org/10.1080/21650373.2023.2243470","url":null,"abstract":"Freeze-thaw modification of recycled coarse aggregate (RCA) is capable to remove the attached mortar efficiently, which can promote the usage of such eco-friendly recycled construction materials. To produce natural coarse aggregate (NCA) without introducing additional damage by this method, it is important to know the frost resistance of attached mortar in RCA. This paper presents a mesoscale analysis of mortar deterioration during freeze-thaw modification of RCA. The pore size distribution, pore pressure induced from ice formation, meso-scale constitutive laws are modeled and integrated with the discrete element method—Rigid Body Spring Model. The deformation during FTC, crack patterns and the mechanical behaviors are simulated with three typical types of RCA. Experiment results are also adopted to qualitatively show the effectiveness of such freeze-thaw modification. Finally, an empirical model to calculate the deteriorated mechanical properties of RCA is developed according to the numerical analysis.","PeriodicalId":48521,"journal":{"name":"Journal of Sustainable Cement-Based Materials","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46902268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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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