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Ultra High Early Strength Self-compacting Mortar Based on Sulfoaluminate Cement and Silica Fume

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Journal of Wuhan University of Technology(Materials Science) 2013年第5期28卷 973-979页

作者：朱艳超马保国 li xiangguo HU Di State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology

The influences of silica fume and aluminum sulfate on hydration process of sulfoaluminate cement were carried out by ring flow, setting time, hydration heat, XRD and DTG analyses. In addition, mortar mixtures with different functional additives have been studied through compressive strength, flexural strength, volume stability at early age and porosity characterization tests. The results show that the addition of silica fume and aluminum sulfate reduces the fluidity and shortens the setting time of sulfoaluminate cement paste, promoting hydration process and increasing hydration products at early age. In the case of appropriate proportion of mortar, the inclusion of hydroxy propyl methyl cellulose, dispersible polypropylene fiber arid organic silicon kind of defoamer can control segregation and bleeding, improve mechanical strength and volume stability at early age, and modify the pore distribution of sulfoaluminate cement mortar, respectively. The sulfoaluminate cement mortar can carry out gravitational grouting in the absence of outside force, the compressive strength of 2 hours and 24 hours have reached 26 and 58 MPa respectively, and have good micro- expansion and *** distribution characterization.

关键词： sulfoaluminate cement ultra high early strength functional additives volume stability pore distribution

The Influence of Oleic Acid on the Hydration and Mechanical Properties of Portland Cement

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Journal of Wuhan University of Technology(Materials Science) 2013年第6期28卷 1177-1180页

作者： MA Baoguo WANG Jingran li xiangguo HE Chao YANG Haitao State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology

To investigate the effects of OA on the portland cement using oleic acid （OA） as grinding aid and the effects of OA on the portland cement, we characterized the different perfermances of the cement, discussed the characteristics of properties. The results reveal that the OA can reduce the water requirement of normal consistency. With the content of OA added, setting time was extended. The OA can significantly improve the rheological properties of cement-based materials, while the compressive strength decreases.

关键词： oleic acid grinding aid hydration mechanical properties

Effect of Competitive Adsorption between Sodium Tripolyphosphate and Naphthalene Superplasticizer on Fluidity of Cement Paste

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Journal of Wuhan University of Technology(Materials Science) 2014年第2期29卷 334-340页

作者：谭洪波 MA Baoguo li xiangguo JIAN Shouwei YANG Hu State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology

The adsorption amount, ξ-potential of cement particles and fluidity of cement paste were tested to research the competitive adsorption between naphthalene superplasticizer （FDN） and STPP. The experimental results showed that the presence of STPP could significantly improve the fluidity of cement paste and reduce the fluidity loss with FDN. There existed a competitive adsorption between STPP and FDN. STPP and calcium ions formed complexes; they preferentially adsorbed onto surface of cement particles and preempt adsorption points of FDN; and it reduced adsorption amount of FDN. In the absence of STPP, saturation adsorption amount of FDN was 5.93 mg/g; but when the dosage of STPP was 0.1%, it reduced to 4.3 mg/g （about 72.5%）. The adsorption amount of FDN was reduced by STPP, but ξ-potential of cement particles enhanced and fluidity of cement paste increased because of strong negative charge effect of the complexes. Adsorption of the complexes would delay Ca^2＋ into liquid and inhibit formation of active adsorption points. Then, content of FDN in liquid increased with the addition of STPP and ξ-potential of cement particles became stable. In this way, fluidity loss of cement paste reduced.

关键词： sodium tripolyphosphate naphthalene superplasticizer ξ-potential complex competitive adsorption

Melting Reconstruction Features and Solidification Mechanism of Heavy Metal-containing Slag

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Journal of Wuhan University of Technology(Materials Science) 2014年第2期29卷 346-350页

作者：罗忠涛 XIAO Yuling YANG Jiujun li xiangguo WANG Xiao School of Materials Science and Engineering Zhengzhou University School of Materials Science and Engineering Tianjin Chengjian University Laboratory of Silicate Materials for Architectures Wuhan University of Technology

The relationships between microstructure and melting temperature of slag containing different heavy metals （Zn, Cu, Pb and Cr） were studied. Furthermore, the corresponding solidification mechanism and rule of heavy metals were analyzed by microscopic tests during melting and reconstructing process. Based on preliminary results, three conclusions were derived. Firstly, pure slag would begin to melt when the temperature reached 1 180℃; however, Zn did not play any fluxing action. Secondly, upon adding Cu and Pb, the initial melting temperature of slag decreased by 5-8℃ and their fluxing effect was observed. Thirdly, the initial melting temperature and the reaction time for slag decreased by 22℃ and 6 s respectively after adding Cr; the fluxing action was significant under Cr. The results of X-ray diffraction （XRD） and Fourier transform infrared spectroscope （FTIR） analyses showed that the above heavy metals had little influence on the reconstruction of slag. Toxicity characteristic leaching procedure （TCLP） leaching tests showed a good solidification effect of the heavy metals with melting slag, fixation rate of Zn, Cu, Pb and Cr was 36.3%, 24.6%, 9.2% and 93.2%, respectively. The leaching toxicity of the heavy metals met the requirements for environmental emission after solidification treatment.

关键词： water quenching slag melting heavy metals solidification TCLP

Properties and Hydration Mechanism on High-strength Anchorage Grouting Material for Highway Slope

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Journal of Wuhan University of Technology(Materials Science) 2013年第6期28卷 1181-1185页

作者： TANG Hua li xiangguo ZHANG Fachun HE Chao TAN Hongbo FANG Rui State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of Sciences State Key Laboratory of Silicate Materials for Architectures (Wuhan University of Technology) National Engineering Laboratory for Land Transport Meteorological Disaster Control Technology

The rheological and mechanical properties of high-strength anchorage grouting materials for highway slope were investigated to optimize the mix proportion. The experimental results showed that the optimized mix proportion of high-strength anchorage grouting material （HAGM） was C3 （FA：SP-SF= 1：2：2; AGI：AG2=3：7 and 0.03% FC）, which is agreement with the limitation of JCT 986-2005. Moreover, the XRD and FTIR results showed the addition of expansive components was in favor of the formation of ettringite. The intensity of AFt oeak of the samnles increased with the increasing of hydration time.

关键词： grouting material fluidity strength hydration slope

A complete MAP kinase cascade controls hyphopodium formation and virulence of Verticillium dahliae

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aBIOTECH 2023年第2期4卷 97-107页

作者： Ziqin Ye Jun Qin Yu Wang Jinghan Zhang Xiaoyun Wu xiangguo li lifan Sun Jie Zhang State Key Laboratory of Plant Genomics Institute of MicrobiologyChinese Academy of SciencesBeijing100101China CAS Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijing100049China State Key Laboratory of Crop Stress Biology for Arid Areas College of Plant ProtectionNorthwest A&F UniversityYangling712100China School of life Sciences Hebei UniversityBaoding710023China College of Agronomy Shanxi Agricultural UniversityTaigu030801China

Phytopathogens develop specialized infection-related structures to penetrate plant cells during *** from phytopathogens that form appressoria or haustoria,the soil-borne root-infecting fungal pathogen Verticillium dahliae forms hyphopodia during infection,which further differentiate into penetration pegs to promote *** molecular mechanisms underlying the regulation of hyphopodium formation in *** remain poorly ***-activated protein kinases(MAPKs)are highly conserved cytoplasmic kinases that regulate diverse biological processes in *** we found that deletion of VdKss1,out of the five MAPKs encoded by ***,significantly impaired *** hyphopodium formation,in vitro penetration,and pathogenicity in cotton *** activation of MAPK kinase(MAPKK)VdSte7 and MAPK kinase kinase(MAPKKK)VdSte11 specifically activate *** of VdSte7 or VdSte11 resulted in a phenotype similar to that of the mutant with VdKss1 ***,this study demonstrates that VdSte11-VdSte7-VdKss1 is a core MAPK cascade that regulates hyphopodium formation and pathogenicity in ***.

关键词： Verticillium MAPK Hyphopodium Pathogenicity

Research Situation and Prospect of Resveratrol from Veratrum nigrum linn

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Agricultural Biotechnology 2018年第4期7卷 120-124,146页

作者： Yuting ZHAO xiangguo li Agricultural College Yanbian University

The effective component in Veratrum nigrum linn, resveratrol, as an imporant phytoalexins, has broad applications. In recent years, broad and profound studies have been conducted on resveratrol in the fields including plant physiology, food, medicine, and health care products. In this paper, the research progress in its source, physiochemical properties, analysis and detection, extraction and antibacterial effect was reviewed, so as to provide valueful reference for further research and development of resveratrol.

关键词： Resveratrol Extraction Analytical detection Antibacterial effect

Effects of Different Shading Treatments on Agronomic Characters of Cultivated Ginseng(Panax ginseng)in Farmland

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Agricultural Biotechnology 2018年第2期7卷 143-146,150页

作者： Hongpeng li Yingjiao li Yuting ZHAO xiangguo li Agricultural College of Yanbian University Yanji 133002Chin Meteorological Bureau of Tonghua Tonghua 134001China

As the main environmental factor of ginseng growth,illumination plays an important role in ginseng（ Panax ginseng） growth and development. Although ginseng is a shade-demanding plant,we need to get higher yield and quality under ideal light conditions. Three different illumination conditions for growth were created through different shading treatments. It was concluded that the adjustment of illumination according to monthly irradiance is beneficial to ginseng growth; appropriate illumination significantly affected root diameter; and SPAD value could also be used in the production of ginseng,but different light environments have influences on its accuracy. Reasonable light adjustment could improve the accuracy of the prediction value of SPAD.

关键词： Shade Illumination Panax ginseng SPAD valueHome

Occurrence Characteristics and Control of Thrips tabaci in Yanji City

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Plant Diseases and Pests 2016年第2期7卷 23-25页

作者： Huang Shichen li xiangguo Jin Dayong Agricultural College of Yanbian University Yanji 133002 China

With the increasing plant area of welsh onion, onion and Chinese onion, the damage of Thrips tabaci in Yanji City is aggravating day by day. Through preliminary investigation and literature reading, we summarized occurrence status, morphological characteristics, damage characteristics, occurrence regularity, living habit, outbreak cause and integrated control technology of T. tabaci in Yanji City, in order to control the hazard of T. tabaci effectively.

关键词： Thrips tabaci Occurrence regularity Prevention and control