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Long-Term Performance and Microstructural Characterization of Dam Concrete in the Three Gorges Project

Chen Lyu,Cheng Yu,Chao Lu,Li Pan,Wenwei Li,Jiaping Liu,

Engineering doi: 10.1016/j.eng.2023.04.017

Abstract: Microstructural analyses of the laboratory concrete samples demonstrated that moderate-heat cement andIn this study, both macro performance and microstructural analyses revealed that the application of moderate-heatcement and FA resulted in a dense and homogenous microstructure, which ensured the excellent long-term

Keywords： Three Gorges Dam     Long-term performance     Microstructural analysis     Moderate-heat cement     Fly ash    

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Recovery of waste heat in cement plants for the capture of CO

Ruifeng DONG, Zaoxiao ZHANG, Hongfang LU, Yunsong YU

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 1,   Pages 104-111 doi: 10.1007/s11705-011-1166-0

Abstract: A large part of the energy used in the making of cement is released as waste heat.A process to capture CO by integrating the recovery and utilization of waste heat has been designed.Aspen Plus software was used to calculate the amount of waste heat and the efficiency of energy utilizationwith a cement output of 1 Mt/y.According to the calculations: 1) the generating capacity of the waste heat recovery system is 4.9 MW

Keywords： cement industry     waste heat     recovery     utilization     CO2 removal    

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Characterization of 3D microstructure, thermal conductivity, and heat flow of cement-based foam using

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 643-651 doi: 10.1007/s11709-021-0709-9

Abstract: This study presents the results of the 3D microstructure, thermal conductivity, and heat flow in cement-basedImages were captured using X-ray micro computed tomography (micro-CT) imaging technique on cement-basedThe 3D model showed that heat flows through the cement paste solids and with an increase in porosity

Keywords： 3D pore volume distribution     X-ray tomography     3D shape factor     heat flow    

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Hydration, microstructure and autogenous shrinkage behaviors of cement mortars by addition of superabsorbent

Beibei SUN, Hao WU, Weimin SONG, Zhe LI, Jia YU

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 5,   Pages 1274-1284 doi: 10.1007/s11709-020-0656-x

Abstract: the effect of SAP on hydration, autogenous shrinkage, mechanical properties, and microstructure of cementInfluences of SAP on hydration heat and autogenous shrinkage were studied by utilizing TAM AIR technologyAlthough SAP decreased the peak rate of hydration heat and retarded the hydration, it significantly increasedthe cumulative heat, indicating SAP helps promote the hydration.The microstructure difference caused by SAP contributed to the inferior mechanical behaviors of cement

Keywords： Superabsorbent Polymer     mechanical properties     hydration heat     autogenous shrinkage     microstructure    

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Effect of potassium carbonate on catalytic synthesis of calcium carbide at moderate temperature

Dejun SHI, Ke QIAO, Zifeng YAN

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 3,   Pages 372-375 doi: 10.1007/s11705-010-0570-1

Abstract: Calcium carbide was successfully synthesized by carbothermal reduction of lime with coke at 1973 K for 1.5 h. The effect of potassium carbonate as additive on the composition and morphology of the product was investigated using X-ray diffraction and scanning electron microscope. Addition of potassium carbonate increased the yield of calcium carbide. The sample in the presence of potassium carbonate generated acetylene gas of 168.3 L/kg, which was 10% higher than that in the absence of potassium carbonate. This result confirmed the catalytic effect of potassium carbonate on the synthesis of calcium carbide. A possible mechanism of the above effects was that the additive, which was melted at the reduction temperature, dissolved CaO and so promoted the contact between CaO and carbon, which was essential for the solid-solid reaction to form calcium carbide.

Keywords： calcium carbide     synthesis     catalysis    

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Development of an H reduction and moderate oxidation method for 3,5-dimethylpyridine hydrogenation in

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 12,   Pages 1807-1817 doi: 10.1007/s11705-022-2243-2

Abstract: Therefore, an in-situ H2 reduction and moderate oxidation method was developed to increaseconversion was obtained for the Ru/C-i1 catalyst prepared by in-situ H2 reduction and moderatesignificant decrease in the Ru/RuOx ratio of the in-situ H2 reduction and moderateThe developed in-situ H2 reduction and moderate oxidation method eliminated the step

Keywords： Ru/C catalyst     in-situ H2 reduction and moderate oxidation     in-situ reduction    

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Extending blending proportions of ordinary Portland cement and calcium sulfoaluminate cement blends:

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 5,   Pages 1249-1260 doi: 10.1007/s11709-021-0770-4

Abstract: This study extended blending proportion range of ordinary Portland cement (OPC) and calcium sulfoaluminate(CSA) cement blends, and investigated effects of proportions on setting time, workability, and strength

Keywords： calcium sulfoaluminate cement     cement blends     hydration reaction     setting     workability     compressive strength    

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Key technical innovations in the construction of Baihetan Hydropower Station Project

Frontiers of Engineering Management 2023, Volume 10, Issue 2,   Pages 367-372 doi: 10.1007/s42524-023-0253-5

Abstract: Key technical innovations in the construction of Baihetan Hydropower Station Project

Keywords： ultra-high arch dam     columnar jointed basalt     low-heat cement concrete     temperature controlled crack    

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ITZ microstructure, thickness, porosity and its relation with compressive and flexural strength of cementmortar; influence of cement fineness and water/cement ratio

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 2,   Pages 191-201 doi: 10.1007/s11709-021-0792-y

Abstract: A new insight into the interfacial transition zone (ITZ) in cement mortar specimens (CMSs) that is influencedby cement fineness is reported.The importance of cement fineness in ITZ characterizations such as morphology and thickness is elucidatedThe findings indicate that by increasing the cement fineness the calcium silicate hydrate formation inBy increasing cement fineness by about 25% of, the ITZ thickness of CMSs was reduced by about 30% and

Keywords： cement fineness     interfacial transition zone     compressive and flexural strength    

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Study on Blasting Fragmentation Control for Moderate Deep Hole in Underground Mine

Zhao Yanwei,He Dongmei,Li Xianglong,Liu Junxuan

Strategic Study of CAE 2014, Volume 16, Issue 11,   Pages 48-52

Abstract:

The scallop moderate longhole blasting mining method in Da Hong-shanIn order to realize the mine production efficient development, the circular moderate longhole blastingthat circular hole blasting can reduce the block rate is reduced to 10.3%, and the traditional scallop moderate

Keywords： The scallop moderate longhole blasting     the circular moderate longhole blasting     lump ore     blasting effect    

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Study of bond strength between various grade of Ordinary Portland Cement (OPC) and Portland PozzolaneCement (PPC) mixes and different diameter of TMT bars by using pullout test

A D POFALE, S P WANJARI

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 1,   Pages 39-45 doi: 10.1007/s11709-013-0193-y

Abstract: Since last two decades, the Portland Pozzolane Cement (PPC) is extensively used in structural concreteThere are many literatures available on bond strength of concrete mixes using Ordinary Portland Cement

Keywords： bond strength     Portland Pozzolane Cement (PPC) concrete     Ordinary Portland Cement (OPC) concrete     bond between    

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Autogenous healing mechanism of cement-based materials

Frontiers of Structural and Civil Engineering   Pages 948-963 doi: 10.1007/s11709-023-0960-3

Abstract: Autogenous self-healing is the innate and fundamental repair capability of cement-based materials forHowever, systematic research on the autogenous healing mechanism of cement-based materials is lackingThe healing process mainly involves a chemical process, including further hydration of unhydrated cementHence, the autogenous healing process is influenced by the material constituents of the cement compositeThis study provides a valuable reference for developing an improved healing technique for cement-based

Keywords： autogenous healing     cement-based materials     healing mechanism     aggregation effect    

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Research review of the cement sand and gravel (CSG) dam

Xin CAI, Yingli WU, Xingwen GUO, Yu MING

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 1,   Pages 19-24 doi: 10.1007/s11709-012-0145-y

Abstract: The cement sand and gravel (CSG) dam is a new style of dam that owes the advantages both of the concrete

Keywords： cement sand and gravel (CSG) dam     cement sand and gravel (CSG) material     research review    

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Experimental study and field application of calcium sulfoaluminate cement for rapid repair of concrete

Yanhua GUAN, Ying GAO, Renjuan SUN, Moon C. WON, Zhi GE

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 3,   Pages 338-345 doi: 10.1007/s11709-017-0411-0

Abstract: Type III cement and Calcium Sulfoaluminate (CSA) cement are the most commonly used fast-setting hydrauliccement (FSHC).CSA cement concrete had higher early-age and long term strength.The shrinkage of CSA cement concrete was lower than that of Type III cement concrete.Both CSA and Type III cement concrete had similar CTE values.

Keywords： Calcium Sulfoaluminate (CSA) cement     Type III cement     coefficient of thermal expansion (CTE)     shrinkage    

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The effect of SiO

Ismael FLORES-VIVIAN, Rani G.K PRADOTO, Mohamadreza MOINI, Marina KOZHUKHOVA, Vadim POTAPOV, Konstantin SOBOLEV

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 4,   Pages 436-445 doi: 10.1007/s11709-017-0438-2

Abstract: The nanoparticles of SiO were used in cement systems to modify the rheological behavior, to enhanceultrafiltration and, optionally, by cryochemical vacuum sublimation drying, were evaluated in portland cementdosage of 0.25% (as a solid material by weight of cementitious materials) was used to compare the cementThe effect of nano-SiO particles in portland cement mortars was investigated by evaluating the flow,heat of hydration and compressive strength development.

Keywords： ultrafiltration     cryochemical vacuum sublimation drying     nanoparticles     portland cement     heat of hydration    

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Title Author Date Type Operation

Long-Term Performance and Microstructural Characterization of Dam Concrete in the Three Gorges Project

Chen Lyu,Cheng Yu,Chao Lu,Li Pan,Wenwei Li,Jiaping Liu,

Journal Article

Recovery of waste heat in cement plants for the capture of CO

Ruifeng DONG, Zaoxiao ZHANG, Hongfang LU, Yunsong YU

Journal Article

Characterization of 3D microstructure, thermal conductivity, and heat flow of cement-based foam using

Journal Article

Hydration, microstructure and autogenous shrinkage behaviors of cement mortars by addition of superabsorbent

Beibei SUN, Hao WU, Weimin SONG, Zhe LI, Jia YU

Journal Article

Effect of potassium carbonate on catalytic synthesis of calcium carbide at moderate temperature

Dejun SHI, Ke QIAO, Zifeng YAN

Journal Article

Development of an H reduction and moderate oxidation method for 3,5-dimethylpyridine hydrogenation in

Journal Article

Extending blending proportions of ordinary Portland cement and calcium sulfoaluminate cement blends:

Journal Article

Key technical innovations in the construction of Baihetan Hydropower Station Project

Journal Article

ITZ microstructure, thickness, porosity and its relation with compressive and flexural strength of cementmortar; influence of cement fineness and water/cement ratio

Journal Article

Study on Blasting Fragmentation Control for Moderate Deep Hole in Underground Mine

Zhao Yanwei,He Dongmei,Li Xianglong,Liu Junxuan

Journal Article

Study of bond strength between various grade of Ordinary Portland Cement (OPC) and Portland PozzolaneCement (PPC) mixes and different diameter of TMT bars by using pullout test

A D POFALE, S P WANJARI

Journal Article

Autogenous healing mechanism of cement-based materials

Journal Article

Research review of the cement sand and gravel (CSG) dam

Xin CAI, Yingli WU, Xingwen GUO, Yu MING

Journal Article

Experimental study and field application of calcium sulfoaluminate cement for rapid repair of concrete

Yanhua GUAN, Ying GAO, Renjuan SUN, Moon C. WON, Zhi GE

Journal Article

The effect of SiO

Ismael FLORES-VIVIAN, Rani G.K PRADOTO, Mohamadreza MOINI, Marina KOZHUKHOVA, Vadim POTAPOV, Konstantin SOBOLEV

Journal Article