Advances in Cement Research最新文献_第3页

Chloride penetration resistance of concrete under dual effects of leaching and stress 混凝土在浸出和应力双重作用下的抗氯化物渗透能力

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-03-11 DOI: 10.1680/jadcr.23.00227

Shaowei Wang, Wenlong Gao, Yanyu Xiao, Jiawen Wu, Qun Xia

{"title":"Chloride penetration resistance of concrete under dual effects of leaching and stress","authors":"Shaowei Wang, Wenlong Gao, Yanyu Xiao, Jiawen Wu, Qun Xia","doi":"10.1680/jadcr.23.00227","DOIUrl":"https://doi.org/10.1680/jadcr.23.00227","url":null,"abstract":"Chloride penetration is one of the main causes for the failure of reinforced concrete structures, especially in undersea tunnels, which is also accompanied by stress and seepage water-induced calcium leaching. In this paper, the chloride penetration resistances of concrete under the single and dual effects of stress and calcium leaching were investigated, and the microscopic mechanism was explained by Scanning Electron Microscopy (SEM) and X-ray diffraction analysis (XRD). The results show that the chloride diffusion depth and chloride content linearly increase with the stress level in the tensile zone, while linearly decrease in the compressive zone, and the change is more obvious in the tensile zone. At stress levels of 15%, 30%, and 45%, the diffusion depth in the tensile zone increases by 11.4%, 36.6%, and 43.5%, respectively, and the increased ratios of chloride content are 1.2%, 11.2%, and 19.4%. There is no significant synergistic effect between stress and calcium leaching on chloride diffusion depth, but it is obvious on chloride content, especially when the tensile stress level is below 15% and the compressive stress level is above 30%, for which the differences caused by considering the synergistic effect or not are approximately 6% and 15%, respectively.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140251845","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}

引用次数: 0

Influence of thermochemical high-temperature reconstruction on mechanical properties and activity of stainless steel slag 热化学高温重构对不锈钢渣机械性能和活性的影响

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-02-24 DOI: 10.1680/jadcr.23.00083

Pengjie Xu, Jintao Fan, Rongjin Liu, Ping Chen, Jiazhan Wei, Yi Yang, Xiaochun Tang

{"title":"Influence of thermochemical high-temperature reconstruction on mechanical properties and activity of stainless steel slag","authors":"Pengjie Xu, Jintao Fan, Rongjin Liu, Ping Chen, Jiazhan Wei, Yi Yang, Xiaochun Tang","doi":"10.1680/jadcr.23.00083","DOIUrl":"https://doi.org/10.1680/jadcr.23.00083","url":null,"abstract":"The stainless steel slag's low activity, primarily attributed to its high γ-C2S and low C3S content, impedes its effective utilization. This study employs a thermochemical high-temperature reconstruction method utilizing lime and bauxite as tempering agents to regulate the mineral phase. Through an array of tests and analytical techniques, including compressive strength test, activity index, XRD, SEM, and hydration heat analysis, the impact of Ca/Si ratio and sintering temperature on the mechanical properties and activity of reconstituted stainless steel slag mortar is examined. The findings indicate that at a Ca/Si ratio of 4.2 and a sintering temperature of 1290°C, the reconstructed slag demonstrates optimal mechanical properties and activity, yielding compressive strengths of 43.69 MPa and 62.58 MPa at 7 days and 28 days, respectively, with remarkable 28 day activity index of 143.49%. The proposed thermochemical high-temperature reconstruction method ingeniously employs high temperature to increase the content of C3S while rapid cooling prevents the alteration of the C2S crystalline structure. This innovation significantly enhances the mechanical properties and activity of the stainless steel slag, offering promising avenues to increase its utilization rate.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140167982","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}

引用次数: 0

Effects of stream curing on the pore structure of recycled aggregate concrete 流水养护对再生骨料混凝土孔隙结构的影响

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-02-19 DOI: 10.1680/jadcr.22.00092

Yuzhi Chen, Yingjie Ning, Xudong Chen, Weihong Xuan, Yuzhu Guo

引用次数: 0

Enhancing piezoresistivity of cement sensor with supplementary materials and carbonation curing 利用补充材料和碳化固化提高水泥传感器的压阻系数

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-02-08 DOI: 10.1680/jadcr.23.00202

Daeik Jang, Jinho Bang, Haemin Jeon

引用次数: 0

Enhancing piezoresistivity of cement sensor with supplementary materials and carbonation curing 利用补充材料和碳化固化提高水泥传感器的压阻系数

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-02-08 DOI: 10.1680/jadcr.23.00202

Daeik Jang, Jinho Bang, Haemin Jeon

引用次数: 0

Preparation of alkali-free liquid accelerator with fluorine-containing silicon residue and its accelerating mechanism 含氟硅残留物的无碱液体促进剂的制备及其促进机理

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-01-19 DOI: 10.1680/jadcr.23.00151

Dinghu Wu, Xiaotong Liu, Yuan Liu, Anxu Yang, Lin Yang

引用次数: 0

Utilization of local raw materials and mine waste to manufacture cement in Northwest Territories, Canada 在加拿大西北地区利用当地原材料和矿山废料生产水泥

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-01-19 DOI: 10.1680/jadcr.23.00195

Guangping Huang, Jian Zhao, G. L. Dzemua, Scott Cairns, Philippe Normandeau, W. Liu

{"title":"Utilization of local raw materials and mine waste to manufacture cement in Northwest Territories, Canada","authors":"Guangping Huang, Jian Zhao, G. L. Dzemua, Scott Cairns, Philippe Normandeau, W. Liu","doi":"10.1680/jadcr.23.00195","DOIUrl":"https://doi.org/10.1680/jadcr.23.00195","url":null,"abstract":"Currently, all the cement consumed in Northwest Territories (NWT), Canada, is imported from other provinces (e.g., Alberta) by long-distance (∼1,800 km) truck freight. Transporting cement over long distances not only raises its cost, but also results in a higher carbon footprint. Locally producing cement is a potential low-carbon and economic solution for the local industry. However, it is unknown if the local raw materials are suitable for cement manufacturing; and there is a lack of a critical raw material—Iron ore—for cement manufacturing. Instead of iron ore, there are iron-rich tailings from a local rare earth element (REE) mine. Towards low-carbon and circular economy, this study explored the use of local raw materials (i.e., limestone, clay, and gypsum) and mine waste (REE tailings) to manufacture cement in the NWT and successfully produced the first bag of cement in the history of the NWT. The results showed that concrete samples made with NWT cement achieved comparable strength of commercial OPC-based concrete. An emission estimation suggested that locally producing cement in the NWT has the potential to reduce 3.0%–61.7% of CO2 emissions when compared with importing cement from other provinces.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139613165","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}

引用次数: 0

Evaluation of compressive strength and chloride permeability of cement-based materials with high-volume compound mineral admixtures 使用高容量复合矿物掺合料评估水泥基材料的抗压强度和氯离子渗透性

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-01-19 DOI: 10.1680/jadcr.23.00185

Nannan Zhang, Qionglin Fu, Junfeng Wang, Liulei Lu, Qi Luo, Feng Xing

{"title":"Evaluation of compressive strength and chloride permeability of cement-based materials with high-volume compound mineral admixtures","authors":"Nannan Zhang, Qionglin Fu, Junfeng Wang, Liulei Lu, Qi Luo, Feng Xing","doi":"10.1680/jadcr.23.00185","DOIUrl":"https://doi.org/10.1680/jadcr.23.00185","url":null,"abstract":"Ground granulated blast furnace slag (GGBFS) is well known as the capable of improving the performance of cement-based materials, but few studies focus on the impact of its large dosage on concrete containing basalt powder. In this study, the compressive strength and chloride permeability of cement-based materials with compound mineral admixtures (CMAs) containing the high-volume GGBFS, basalt powder, and desulfurization gypsum were investigated. The results showed that the mortar strengths at 3, 7, and 28 days decreased with increasing GGBFS content, but that at 56 and 84 days increased with the addition of 45 wt.% GGBFS. This is because the activity of GGBFS at early stage has not been stimulated and the pozzolanic effect is exerted at later stage. Moreover, cement replacement with up to 55 wt.% GGBFS caused a significant decrease in the chloride diffusion coefficient of the mortar and concrete. Furthermore, the incorporation of GGBFS led to a remarkable refinement in pore structure of the hardened paste due to the pozzolanic and filler effects. Therefore, the partial replacement of cement with high CMA contents (≥ 70 wt.%) in concrete is desirable for ocean projects requiring low chloride permeability and significantly reduces carbon emissions.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139525575","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}

引用次数: 0

Characteristics of the corrosion products of steel bars in modified magnesium oxysulfide cement containing chloride salts 含有氯盐的改性氧化镁水泥中钢筋腐蚀产物的特征

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-01-12 DOI: 10.1680/jadcr.23.00141

Mingfang Ba, Siyi Fang, Zhirui Xu, Gaoke Yu, Danlei Zhang

引用次数: 0

Advances in Cement Research: Referees 2023 水泥研究进展》：参考文献 2023

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-01-01 DOI: 10.1680/jadcr.2024.36.1.45

引用次数: 0