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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 strengthThe setting time of the OPC-CSA blends was extended, and the workability was improved with increase of

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

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Simulation of combustion in spark-ignition engine fuelled with natural gas-hydrogen blends combined with

Jie WANG, Zuohua HUANG, Bing LIU, Xibin WANG

Frontiers in Energy 2009, Volume 3, Issue 2, Pages 204-211 doi: 10.1007/s11708-009-0026-9

Abstract: A numerical simulation of the influence of different hydrogen fractions, excess air ratios and EGR mass fractions in a spark-ignition engine was conducted. Good agreement between the calculated and measured in-cylinder pressure traces as well as pollutant formation trends was obtained. The simulation results show that NO concentration has an exponential relationship with temperature and increases sharply as hydrogen is added. EGR introduction strongly influences the gas temperature and NO concentration in the cylinder. The difference in temperature will lead to even greater difference in NO concentration. Thus, EGR can effectively decrease NO concentration. NO concentration reaches its peak value at the excess air ratio of 1.1 regardless of EGR mass fraction. The study shows that natural gas-hydrogen blend combined with EGR can realize a stable combustion and low NO emission in a spark-ignition engine.

Keywords： natural gas hydrogen NO exhaust gas recirculation numerical simulation

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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 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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performance, combustion and emission characteristics of diesel-thermal cracked cashew nut shell liquid blends

Arunachalam VELMURUGAN,Marimuthu LOGANATHAN,E. James GUNASEKARAN

Frontiers in Energy 2016, Volume 10, Issue 1, Pages 114-124 doi: 10.1007/s11708-016-0394-x

Abstract: This paper explores the use of artificial neural networks (ANN) to predict performance, combustion and emissions of a single cylinder, four stroke stationary, diesel engine operated by thermal cracked cashew nut shell liquid (TC-CNSL) as the biodiesel blended with diesel. The tests were performed at three different injection timings (21°, 23°, 25°CA bTDC) by changing the thickness of the advance shim. The ANN was used to predict eight different engine-output responses, namely brake thermal efficiency (BTE), brake specific fuel consumption (BSFC), exhaust gas temperature (EGT), carbon monoxide (CO), oxide of nitrogen (NO ), hydrocarbon (HC), maximum pressure ( ) and heat release rate (HRR). Four pertinent engine operating parameters, i.e., injection timing (IT), injection pressure (IP), blend percentage and pecentage load were used as the input parameters for this modeling work. The ANN results show that there is a good correlation between the ANN predicted values and the experimental values for various engine performances, combustion parameters and exhaust emission characteristics. The mean square error value (MSE) is 0.005621 and the regression value of is 0.99316 for training, 0.98812 for validation, 0.9841 for testing while the overall value is 0.99173. Thus the developed ANN model is fairly powerful for predicting the performance, combustion and exhaust emissions of internal combustion engines.

Keywords： cashew nut shell liquid (CNSL) artificial neural networks (ANN) thermal cracking mean square error (MSE)

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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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Combustion characteristics of SI engine fueled with methanol-gasoline blends during cold start

SONG Ruizhi, LIU Shenghua, LIANG Xiaoqiang, Tiegang H U

Frontiers in Energy 2008, Volume 2, Issue 4, Pages 395-400 doi: 10.1007/s11708-008-0081-7

Abstract: A 3-cylinder port fuel injection (PFI) engine fueled with methanol-gasoline blends was used to study

Keywords： combustion 3-cylinder indicated Cylinder pressure emission

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Multiscale mechanical modeling of hydrated cement paste under tensile load using the combined DEM-MD

Yue HOU, Linbing WANG

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 3, Pages 270-278 doi: 10.1007/s11709-017-0408-8

Abstract: this paper, a combined DEM-MD method is proposed to simulate the crack failure process of Hydrated Cement

Keywords： hydrated cement paste multiscale MD simulation DEM

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Mechanical properties and microstructure of multilayer graphene oxide cement mortar

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4, Pages 1058-1070 doi: 10.1007/s11709-021-0747-3

Abstract: of multilayer graphene oxide (MGO) on compressive strength, flexural strength, and microstructure of cementThe cement mortar was prepared with type P. II. 52.5 Portland cement, standard sand, and MGO.Four mixes were prepared with inclusion of MGO (0%, 0.02%, 0.04%, and 0.06% by weight of cement).The testing result shows that the compressive of GO-cement mortar increased by 4.84%–13.42%, and theMGO made little contribution to the increases of compressive strength and flexural strength of cement

Keywords： graphene oxide cement mortar mechanical properties microstructure

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Silicon carbide waste as a source of mixture materials for cement mortar

Zhengwu Jiang, Qiang Ren, Haoxin Li, Qing Chen

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 5, doi: 10.1007/s11783-017-0974-y

Abstract: feasibility of recycling silicon carbide waste (SCW) as a source of mixture materials in the production of cementMortars with SCW were prepared by replacing different amounts of cement with SCW, and the propertiesThe shrinkage rate of cement mortar with SCW shows an obvious decrease as the replacement ratio increasesof calcium hydroxide in hardened paste also shows that SCW has some impact on the hydration of the cement-SCWprovides a strategic reference for possibly applying SCW as a mixture material in the production of cement

Keywords： Silicon carbide waste Cement mortar Fluidity Strength Shrinkage

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The stress relaxation of cement clinkers under high temperature

Xiufang WANG,Yiwang BAO,Xiaogen LIU,Yan QIU

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4, Pages 413-417 doi: 10.1007/s11465-015-0357-7

Abstract:

The energy consumption of crushing is directly affected by the mechanical properties of cement materialsThis research provides a theoretical proof for the mechanism of the stress relaxation of cement clinkersvarious temperatures during the cooling process to study the changes in the grinding resistance of the cementeffects of high temperature on the load-displacement curve, compressive strength, and elastic modulus of cementThe elastic modulus and compressive strength of cement clinkers increase with a decrease in temperature

Keywords： stress relaxation high temperature cement clinker compression elastic modulus

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Properties of cement grout modified with ultra-fine slag

Sowmini GOPINATHAN, K B ANAND

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 1, Pages 58-66 doi: 10.1007/s11709-017-0383-0

Abstract: The purpose of the study is to obtain a cement grout with improved performance.The grout mixes of the present study contain cement, ultra-fine slag (UFS), super plasticizer and waterProperties like flowability, bleeding, compressive strength and shrinkage of cement grouts have beenThe results show that, cement replacement with slag in grouts could reduce bleeding substantially without

Keywords： cement grout ultra-fine slag flowability bleeding viscosity

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Assessment of popular techniques for co-processing municipal solid waste in Chinese cement kilns

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 4, doi: 10.1007/s11783-021-1485-4

Abstract:

• Municipal solid waste (MSW) was fermented, screened, gasified, then co-processed.

Keywords： Cement kiln Co-processing Environmental risk assessment By-pass system

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Title Author Date Type Operation

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

Journal Article

Simulation of combustion in spark-ignition engine fuelled with natural gas-hydrogen blends combined with

Jie WANG, Zuohua HUANG, Bing LIU, Xibin WANG

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 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

performance, combustion and emission characteristics of diesel-thermal cracked cashew nut shell liquid blends

Arunachalam VELMURUGAN,Marimuthu LOGANATHAN,E. James GUNASEKARAN

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