Article
Construction & Building Technology
Tingcong Wei, Fengqi Wei, Jinghong Zhou, Zhiqiang Wu, Chunmei Zhang, Jia Zhuang, Xiaowei Cheng
Summary: The poor mechanical properties of oil-well cementitious materials are mainly due to microstructural coarsening. Xonotlite is formed through the crystallisation reaction of silica powder with C-S-H and the pozzolanic reaction of silica powder with calcium hydroxide. High polymerisation degree of Q(2) and Q(3) Si units improves the high-temperature stability of xonotlite, while the dense structure of xonotlite enhances mechanical properties. Therefore, selecting crystalline silica powder for generating xonotlite is preferred in designing high-performance high-temperature resistant cement-based materials.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Engineering, Environmental
Kaiyuan Mei, Xiaowei Cheng, Tao Gu, Youzhi Zheng, Peng Gong, Bin Li, Chunmei Zhang, Liwei Zhang, Bibo Dai
Summary: This study evaluated the corrosion effects of C(4)AF and C(3)A phases of cement induced by H2S, revealing changes in Fe and Al ions during the reaction. Techniques such as FTIR, XPS, and SSNMR were used to examine phase changes and bond structures, providing insights for further development of H2S control materials and risk management.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Ai Bo, Huangqi Wang, Dongmin Wang, Dajiang Zhang
Summary: This study investigates the influence of CaSO4 on the phase transform in NHL materials, and analyzes the effects of CaSO4 dosage and temperature on the phase transform using thermodynamic and kinetic methods. The critical dosage and activation energy were calculated.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Construction & Building Technology
Ludovico Mascarin, Luca Valentini, Gilberto Artioli, Maria Chiara Dalconi, Jean Colombani
Summary: This study aims to accurately describe the dissolution rate of tricalcium silicate (C3S) by implementing a new approach based on holographic interferometry. The protocol involves measuring the pure dissolution rate constant of C3S in supersaturated conditions with respect to C-S-H. By monitoring the release of calcium from a polycrystalline C3S surface in a quiescent solution, the researchers were able to assess the rate law of C3S dissolution.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Manuela Nimmervoll, Alexander Schmid, Gregor Mori, Stefan Honig, Roland Haubner
Summary: This paper investigates the corrosion behavior of high temperature corrosion resistant alloys in a gas atmosphere containing HCl and H2S at 480°C and 680°C. The corrosion rate decreases with increasing Ni-content in the alloy at high temperatures, but this effect is not observed at lower temperatures. Different alloys show varying corrosion behaviors at 480°C and 680°C.
Article
Materials Science, Multidisciplinary
Yanming Liu, Shu Jian Chen, Kwesi Sagoe-Crentsil, Wenhui Duan
Summary: This study focused on the detailed microstructural analysis of the hydration process of C3S, a simplified model of cementitious material. It was found that the length of a metastable barrier in the BSE images correlated well with the hydration rate of C3S, and the hydration process caused significant changes in the pore size and profile of C3S pastes, with the critical pore size for limiting hydration identified as 4 μm. Additionally, C3S samples were observed to reach 80% hydration at 7 days, with continuous development of pore structure thereafter despite similar porosity and hydration levels.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Jihong Lian, Zhiqiang Wu, Yu Lei, Qiang Gao, Kaiyuan Mei, Jingxuan Cai, Xiaowei Cheng
Summary: Under the engineering background of CCUS cementing project, an experiment was conducted to study the growth and development mechanism of cement carbonization products under high temperature, high pressure, and high concentration CO2 environment. A relative crystallinity algorithm was proposed based on phase diffraction pattern data and thermogravimetric experiment, providing a new perspective for the analysis of microstructure changes in cement paste during carbonization process.
FRONTIERS IN MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Ming Jin, Wenwei Li, Yuefeng Ma, Jinhui Tang, Jiale Huang, Haoyu Zeng, Guo Yang, Jiaping Liu
Summary: In this study, high-power Xenon radiation was used to simulate real sunlight radiation, and calcium silicate hydrate was prepared by hydration of tricalcium silicate (C3S) with two different water-to-solids (w/s) ratios. The effects of Xenon radiation on the absorbance, compositions, silicate chain structure, pore structure, and micromorphology of C3S hydration products were investigated. The results showed that Xenon radiation reduced the amount of bound water, increased the polymerization of silicate chain, and refined the nanopore structure of calcium silicate hydrate. This research provides valuable insights into the durability of cement-based materials under atmospheric environments with strong solar radiation.
MATERIALS TODAY COMMUNICATIONS
(2023)
Review
Construction & Building Technology
Jerome Claverie, Qianqian Wang, Siham Kamali-Bernard, Fabrice Bernard
Summary: This article reviews the increasing use of atomistic simulations over the last decade to study cementitious materials properties. It focuses on investigations based on density functional theory, molecular dynamics, and related methods to assess the reactivity and hydration of Portland cement clinker phases at the nanoscale. The limitations of these methods are discussed, and alternative approaches and challenges are introduced.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Construction & Building Technology
Jing Xu, Shaobo Yang, Qiangqiang Ren, Fuhao Chu, Yongjie Na
Summary: The cement industry is facing pressure to meet strict energy consumption and pollution emission requirements, leading to the proposal of a two-process clinker manufacturing method using fluidized bed reactors. The new method showed increased strength and C2S content of intermediate product particles with rising temperature. The optimal pretreatment condition was determined to be calcined for 10 minutes at 1200 degrees Celsius.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Dapeng Zheng, Haibin Yang, Weipeng Feng, Yuan Fang, Hongzhi Cui
Summary: This paper investigates the modification mechanism of cellulose nanocrystals (CNCs) in cement by simplifying the complex cement system to pure tricalcium silicate (C3S) mineral components. The researchers explored the hydration characteristics of C3S mixed with different amounts of CNCs and the chemical environment of the hydration products. It was found that CNCs have a similar effect to superplasticizers in reducing the hydration exothermic, promoting the growth of Ca(OH)2 crystals, and providing additional nucleation sites for the generated C-S-H. The elucidation of the modification mechanism of CNCs provides theoretical guidance for its application in cement.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Construction & Building Technology
Houru Zhen, Yuandong Mu, Zhichao Liu, Fazhou Wang
Summary: The study investigates the effect of potassium nitrate on the carbonation behavior of gamma-C2S, which results in increased carbonation degree, reduced porosity, and improved mechanical properties.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Chemistry, Physical
Dipak Prasad, Nilanjan Mitra
Summary: In this study, a comprehensive understanding of why alite undergoes faster hydration compared to belite is achieved through simulation. A new methodology for assessing crystal surface reactivity is also proposed.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Construction & Building Technology
Xinming Wang, Jing Zhong
Summary: When graphene oxide (GO) is mixed with cement, it can exist in different dispersion states, including well-dispersed, grain-adsorbed, and self-agglomerated. The effects of GO in grain-adsorbed and self-agglomerated states on tricalcium silicate (C3S) hydration were investigated in this study. The results showed that GO in grain-adsorbed state limits the accessibility of reactant for hydration at early age, while GO in self-agglomerated state absorbs calcium ions from the pore solution, leading to inhibition of hydration. These findings enhance the understanding of GO in cement hydration and its potential use in cementitious materials.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Construction & Building Technology
Bohong Zhang, Wenyu Liao, Hongyan Ma, Jie Huang
Summary: This study utilized a novel in situ fiber-optic Raman probe to continuously monitor the hydration progress of C3S and C2S pastes. The hydration processes and the main hydration products, C-S-H and CH, were successfully identified and continuously monitored in situ. The results were correlated with XRD and TGA results, demonstrating the reliability of the technology. The remote fiber-optic Raman probe shows superior signal-to-noise ratio and can be used for on-site monitoring and evaluation of concrete structures.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Construction & Building Technology
Xiaowei Cheng, Xuezheng Yang, Chi Zhang, Xianshu Gao, Yongjin Yu, Kaiyuan Mei, Xiaoyang Guo, Chunmei Zhang
Summary: The study found that adding red mud can exhibit pozzolanic activity at levels below 5%, promoting cement hydration reaction and the production of calcium silicate hydrate (C-S-H), ultimately increasing the strength of hardened cement pastes; however, higher red mud contents will lower the degree of cement hydration, leading to an increase in volume of macropores (d>50 nm), a decrease in volume of mesopores (d=4.5-50 nm), and a significantly decreased strength.
ADVANCES IN CEMENT RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
Xiaowei Cheng, Dan Long, Chi Zhang, Xianshu Gao, Yongjin Yu, Kaiyuan Mei, Chunmei Zhang, Xiaoyang Guo, Zuwei Chen
JOURNAL OF CLEANER PRODUCTION
(2019)
Article
Construction & Building Technology
Kaiyuan Mei, Tao Gu, Youzhi Zheng, Liwei Zhang, Feng Zhao, Peng Gong, Sheng Huang, Chunmei Zhang, Xiaowei Cheng
Summary: Under accelerated carbonation conditions, the destruction rate of alkali-activated materials is too rapid for them to be used in the construction of CCUS wells.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Environmental
Kaiyuan Mei, Xiaowei Cheng, Tao Gu, Youzhi Zheng, Peng Gong, Bin Li, Chunmei Zhang, Liwei Zhang, Bibo Dai
Summary: This study evaluated the corrosion effects of C(4)AF and C(3)A phases of cement induced by H2S, revealing changes in Fe and Al ions during the reaction. Techniques such as FTIR, XPS, and SSNMR were used to examine phase changes and bond structures, providing insights for further development of H2S control materials and risk management.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Construction & Building Technology
Peng Gong, Chunmei Zhang, Zhiqiang Wu, Gaoying Zhang, Kaiyuan Mei, Qiang Gao, Xiaowei Cheng
Summary: The cracking damage of the CCUS downhole cement sheath can be reduced by inducing CaCO3 deposition through reacting with high concentration of CO2 and CaCO3 whiskers. This study demonstrated that the incorporation of CaCO3 whiskers significantly improved the compressive strength and self-healing rate of cement paste cracks.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Tingcong Wei, Xiaowei Cheng, Huiting Liu, Hua Zhang, Liwei Zhang, Kaiyuan Mei, Chunmei Zhang, Kaiqiang Liu, Jia Zhuang
Summary: This study investigated the effect of silica powder dosage on the mechanical properties and microstructure of C3S, as well as the crystallization transformation of hydration products. The results showed that adding 40% silica powder at 230 degrees Celsius achieved the optimal improvement in mechanical properties. With increasing silica powder dosage, some hydration product contents decreased while the content of xonotlite increased. The coarseness of the microstructure at high temperature was identified as the main reason for the deterioration of mechanical properties.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Manguang Gan, Liwei Zhang, Yan Wang, Kaiyuan Mei, Xiaojuan Fu, Xiaowei Cheng, Mingxing Bai, Hejuan Liu, Xiaochun Li
Summary: Understanding the micro-structural changes of wellbore cement under CO2 storage conditions is crucial for assessing the risk of CO2 leakage. Experimental results demonstrate that flow conditions and effective stress significantly influence the micro-structural changes of cement, potentially increasing the risk of CO2 leakage.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Quan Xue, Liwei Zhang, Kaiyuan Mei, Lin Wang, Yan Wang, Xiaochun Li, Xiaowei Cheng, Hejuan Liu
Summary: There are natural high concentration CO2 reservoirs in the deep subsurface worldwide, and the leakage of CO2 from deep reservoirs can lead to concrete carbonation in underground spaces. High concentration CO2 can significantly increase the carbonation rate of concrete, causing concrete damage and reducing its strength and service life.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Gaoyin Zhang, Dan Long, Weining Xu, Xiaowei Cheng, Sheng Huang, Chunmei Zhang, Ming Zhou, Kaiyuan Mei, Liwei Zhang
Summary: This study investigates the mechanism of hydration and improvement of mechanical properties of oil-well cement pastes upon the addition of spherical ferrite (SF). Results showed that SF enhances the compressive and tensile strengths of the cement paste, while reducing its elastic modulus.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Construction & Building Technology
Quan Xue, Liwei Zhang, Kaiyuan Mei, Xiaochun Li, Yan Wang, Xiaowei Cheng, Xiaojuan Fu
Summary: This study evaluated the performances of three types of low density filling materials as candidate filling materials for energy piles. The results showed that adding slag with ScCO2 modification can promote the thermal conductivity of foam cement, which is beneficial for the application of shallow energy piles.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Review
Construction & Building Technology
Quan Xue, Liwei Zhang, Kaiyuan Mei, Xiaochun Li, Pania Newell, Yan Wang, Xiaowei Cheng, Wei Zheng
Summary: This article reviews the research on the impact of carbon dioxide on reinforced concrete in humid environments. It found that carbon dioxide causes deterioration of the structure and strength of concrete and steel reinforcement, and degradation caused by high-concentration carbon dioxide is more severe than that caused by atmospheric carbon dioxide.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Jihong Lian, Zhiqiang Wu, Yu Lei, Qiang Gao, Kaiyuan Mei, Jingxuan Cai, Xiaowei Cheng
Summary: Under the engineering background of CCUS cementing project, an experiment was conducted to study the growth and development mechanism of cement carbonization products under high temperature, high pressure, and high concentration CO2 environment. A relative crystallinity algorithm was proposed based on phase diffraction pattern data and thermogravimetric experiment, providing a new perspective for the analysis of microstructure changes in cement paste during carbonization process.
FRONTIERS IN MATERIALS
(2022)
Article
Construction & Building Technology
Wenyang Zhang, Yong Ma, Ruoyu Yang, Youzhi Zheng, Chunmei Zhang, Kaiyuan Mei, Xiaowei Cheng
Summary: In wellhole environments with large temperature differences, the addition of high-temperature retarders can delay the strength development of cement slurry columns, impacting construction progress and safety. This study explores the use of ethylene diamine tetraacetic acid (EDTA) and calcium nitrate (CN) as synergistic additives to address the slow strength development caused by GH-8L high-temperature retarder. Experimental results demonstrate that the co-addition of EDTA and CN in the cement slurry system can meet the time and strength requirements under high temperature and pressure conditions.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Kaiyuan Mei, Liwei Zhang, Yan Wang, Xiaowei Cheng, Quan Xue, Manguang Gan, Xiaojuan Fu, Chunmei Zhang, Xiaochun Li
Summary: The study reinforced oilwell cement with modified MC Ca-MMT to inhibit carbonation. Through the analysis of microcrystal formation and densified carbonation area, the CO2-resisting mechanisms of MC Ca-MMT reinforced oilwell cement were revealed.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Zhichao Shang, Xiaoping Cai, Farshid Pahlevani, Yan Zheng, Akbar Hojjati-Najafabadi, Xinran Gao, Baojing Zhang, Peizhong Feng
Summary: High porosity Co-Al-Fe intermetallics with 3D-microstructures were successfully synthesized in one step via a thermal explosion reaction. The link between pore structure and permeability was investigated using 3D-XRM technology. The corrosion resistance of the samples with different Fe contents was studied at 900 degrees C under an oxygen/sulphur atmosphere for up to 120 h. The results showed that the samples maintained stable pore structure and intact internal matrices, attributed to the formation of a thin protective layer on the surface. In addition, inward diffusion of S resulted in the formation of FeS nodules.
Article
Materials Science, Multidisciplinary
Lian Ma, Hain Yang, Daquan Zhang, Wei Wu
Summary: In this study, an environmentally friendly volatile corrosion inhibitor, lysine salts (LA), was prepared between graphene oxide (GO) layers using an in situ intercalation technique. The corrosion inhibition effect of LA was evaluated, and it was found that LA-GO2 achieved a 99.3% corrosion inhibition efficiency after composition optimization. The inhibition of the electrochemical anodic process on the surface of mild steel was the main reason for the high corrosion inhibition efficiency of LA-GO2. The properties of the surface film on the corroded steel were also characterized in detail to understand the corrosion inhibition mechanism of LA-GO2.
Article
Materials Science, Multidisciplinary
Running Wang, Jiaping Zhang, Bing Liu, Jie Fei, Qiangang Fu
Summary: By introducing a tailored SiC-C interphase, the carbon fiber can be effectively protected, improving the mechanical and ablation properties of leading edge shaped C/C-ZrC-SiC composites.
Article
Materials Science, Multidisciplinary
Zihua Wang, Chijia Wang, Ruitao Wang, Jiapeng Deng, Kun Zhang, Yanji Zhu, Huaiyuan Wang
Summary: A robust anti-corrosive coating has been developed using functional fly ash, which demonstrates excellent corrosion resistance and improved mechanical properties. The coating achieves these enhancements through molecular cross-linking design and surface augmentation techniques, resulting in a significantly improved impedance modulus compared to pure polyurea coatings.
Article
Materials Science, Multidisciplinary
Haofei Sun, Meifeng Li, Hao Zhang, Jing Liu
Summary: The oxidation behavior of FeCrNi medium entropy alloy was investigated through experimental observations and density functional theory (DFT) calculations. The study found that at 900 degrees C, the alloy forms a desirable and continuous oxide layer, while at 1000 degrees C, the oxide layer becomes discontinuous with penetration of oxide. These observations highlight the significant role of phase structure in promoting the formation of protective oxide scales and influencing oxidation resistance.
Article
Materials Science, Multidisciplinary
Yang Li, Ke Ma, Jingjun Xu, Jingjing Li, Yueming Li, Yi Zhang, Jun Zuo, Meishuan Li
Summary: Cr2AlC diffusion barrier effectively blocks the diffusion of Ti, enhancing the stability and spalling resistance of the Al2O3 scales between NiCrAlY coating and TiAl alloy.
Article
Materials Science, Multidisciplinary
Weiyi Wang, Qinglin Pan, Xiangdong Wang, Bing Liu
Summary: By adding Ce, Sc, Y and Zr elements to Al-Mg-Si alloy, the microstructure of the alloy can be regulated, and the corrosion and heat resistance of the materials can be improved.
Article
Materials Science, Multidisciplinary
Andrea Cristoforetti, Javier Izquierdo, Ricardo M. Souto, Flavio Deflorian, Michele Fedel, Stefano Rossi
Summary: This study presents a new approach to studying the mechanism of filiform corrosion in organic coated steel using the scanning vibrating electrode technique (SVET) and micropotentiometry (potentiometric SECM). The electrochemical activity under the coating was evaluated by mapping the ionic current densities coming from artificial defects made in specific locations of the filament. Antimony tips were also used to investigate the pH changes associated with different corrosion reactions at the metal-paint interface. Local pH levels along the filament in the anodic and cathodic regions were determined.
Article
Materials Science, Multidisciplinary
Yang Gao, Dayun Sun, Zhu Liu, Shuo Cong, Rui Tang, Yanping Huang, Lefu Zhang, Xianglong Guo
Summary: The corrosion characteristics of a novel alumina-forming austenitic steel in high-pressure high-temperature water environment were studied. The addition of aluminum has a negative effect on the continuity of the alumina scale.
Article
Materials Science, Multidisciplinary
Negin Madelat, Benny Wouters, Peter Visser, Zahra Jiryaeisharahi, Kristof Marcoen, Shoshan T. Abrahami, Annick Hubin, Herman Terryn, Tom Hauffman
Summary: This work explores the correlation between electrolyte transport properties and the variation of pigment volume concentration (PVC) in organic coatings. An odd random phase electrochemical impedance spectroscopy (ORP-EIS) approach is used to analyze the diffusion of ions independent from water uptake. The results show that a higher PVC leads to a more homogeneous coating structure, resulting in faster diffusion of ions and enhanced water uptake.
Article
Materials Science, Multidisciplinary
Eloa Lopes Maia, Serguei Gavrilov, Valentyn Tsisar, Kitty Baert, Iris De Graeve
Summary: The effect of pre-oxidation in air at 300-500°C on the initiation and development of liquid metal corrosion attack on 316L austenitic steel in static lead-bismuth eutectic (LBE) has been investigated. It was found that pre-formed oxide films can protect the surface against dissolution, while high temperature pre-oxidation leads to localized corrosion.
Article
Materials Science, Multidisciplinary
Baozhuang Sun, Qiuyu Wang, Yue Pan, Zhiyong Liu, Cuiwei Du, Xiaogang Li
Summary: In this study, a non-steady electrochemical model was established to investigate stress corrosion cracking (SCC). The model was verified using 304 SS with various microstructures, confirming its effectiveness in assessing SCC susceptibility.
Article
Materials Science, Multidisciplinary
Xingyu Xiao, Xinhua Liu, Zhilei Wang, Xuexu Xu, Mingying Chen, Jianxin Xie
Summary: The corrosion behavior and mechanisms of Cu-10Ni-X (Al, Fe, Mn, Cr, Sn, Ti, Zn) alloys in a 3.5% NaCl solution were systematically investigated. Both computational and experimental results revealed that except Ti, other elements could enhance the corrosion resistance of Cu2O passivation film.
Article
Materials Science, Multidisciplinary
Gen Zhang, Yan-Ping Huang, E. Jiang, Wei -Wei Liu, Hong Yang, Jing Xiong, Yong-Fu Zhao
Summary: The addition of aluminum has a significant influence on the intermetallic compounds in AFA alloys, particularly increasing the content of B2-NiAl phase. In the SCO2 environment, the oxide scales formed on AFA alloys with aluminum were thinner than on ASS without aluminum, and the structure of the oxide scales changed to a double-layer structure.
Article
Materials Science, Multidisciplinary
Yuxuan He, Guozheng Xiao, Chao Wang, Xuefeng Lu, Liuyuan Li, Shiying Liu, Yusheng Wu, Zhanjie Wang
Summary: The relationship between configurational entropy and lattice distortion in novel rare earth monosilicates was investigated, and the effect of configurational entropy on their properties was studied. The results showed that lattice distortion increased with the increase of configurational entropy, but a highly symmetrical crystal structure was formed when the configurational entropy was large enough, inhibiting the lattice distortion.
