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The Research for Surface Properties of Steel Slag Powder and High-Temperature Rheological Properties of Asphalt Mortar
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作者 WANG Yefei YUAN Yan +2 位作者 YANG Lihong LIU Yong CHEN Yiwen 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2023年第5期1096-1104,共9页
In order to evaluate the feasibility of steel slag powder as filler,the coating properties of steel slag and limestone aggregate were compared by water boiling test,the micro morphology difierences between steel slag ... In order to evaluate the feasibility of steel slag powder as filler,the coating properties of steel slag and limestone aggregate were compared by water boiling test,the micro morphology difierences between steel slag powder and mineral powder(limestone powder)were compared by scanning electron microscope(SEM),and the high-temperature rheological properties of asphalt mortar with difierent ratio of filler quality to asphalt quality(F/A)and difierent substitution rates of mineral powder(S/F)were studied by dynamic shear rheological test.The results show that the surface microstructure of steel slag powder is more abundant than that of mineral powder,and the adhesion of steel slag to asphalt is better than that of limestone.At the same temperature,the lower the ratio of S/F is,the greater the rutting factor and complex modulus will be.In addition,the complex modulus and rutting factor of the asphalt mortar increase with the increase of F/A,and the filler type and F/A have a negligible efiect on the phase angle. 展开更多
关键词 steel slag powder asphalt mortar microcosmic ADHESION high-temperature rheological properties
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Rheological Properties and Incipient Motion of Cohesive Sediment in the Haine Estuary of China 被引量:14
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作者 白玉川 NG Chiu-on +1 位作者 沈涣庭 王尚毅 《China Ocean Engineering》 SCIE EI 2002年第4期483-498,共16页
The Haihe cohesive sediment, which is typical in China, is studied systematically for its basic physical and incipient motion properties. Following the requirements of dredging works in the Haihe Estuary, cohesive sed... The Haihe cohesive sediment, which is typical in China, is studied systematically for its basic physical and incipient motion properties. Following the requirements of dredging works in the Haihe Estuary, cohesive sediment samples were taken from three locations. Laboratory experiments were conducted to determine the rheological properties of these samples and to examine the incipient motion of the cohesive sediment. It is found that the cohesive sediment has an obvious yield stress tau(b), which increases with the mud density in a manner of an exponential function, and so does the viscosity parameter eta. The cohesive sediment behaves like a Bingham fluid when its density is below 1.38 similar to 1.40 g/cm(3), and when denser than these values, it may become a power-law fluid. The incipient motion experiment also revealed that the incipient velocity of the cohesive sediment increases with die density in an exponential manner. Therefore, the incipient motion is primarily related to the density, which is different from the case for non-cohesive sediment in which the incipient motion is con-elated with the diameter of sand particles instead. The incipient motion occurs in two different ways depending on the concentration of mud in the bottom. For sufficiently fine particles and a concentration lower than 1.20 g/cm(3), the cohesive sediment appears as fluidized mud, and the incipient motion is in the form of instability of an internal wave. For a higher concentration, the cohesive sediment appears as general quasi-solid-mud, and the incipient motion can be described by a series of extended Shields curves each with a different porosity for newly deposited alluvial mud. 展开更多
关键词 incipient motion rheological properties cohesive sediment estuary and coast
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Rheological properties and viscosity reduction of South China Sea crude oil 被引量:6
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作者 Hui Sun Xingxing Lei +4 位作者 Benxian Shen Huiran Zhang Jichang Liu Gengnan Li Di Wu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2018年第4期1198-1207,共10页
The rheological properties of South China Sea (SCS) crude oil were studied. A group of synthetic long-chain polymers, including octadecyl acrylate-maleic anhydride bidodecyl amide copolymer (VR-D), octadecyl acryl... The rheological properties of South China Sea (SCS) crude oil were studied. A group of synthetic long-chain polymers, including octadecyl acrylate-maleic anhydride bidodecyl amide copolymer (VR-D), octadecyl acrylate-maleic anhydride bioctadecyl amide copolymer (VR-O) and octadecyl acrylate-maleic anhydride phenly amide copolymer (VR-A), were employed to serve as viscosity reducers (VRs). Their performance was evaluated by both experimental and computational methodologies. The results suggest that the SCS crude oil has low wax content yet high resin and asphaltene contents, which lead to high viscosity through formation of association structures. Additionally, the SCS crude oil appears to be a pseudoplastic fluid showing linear shear stress-shear rate dependence at low temperature. Interestingly, it gradually evolves into a Newtonian fluid with exponential relationship between shear stress and shear rate at higher temperature. Synthetic VRs demonstrate desirable and effective performance on improvement of the rheological properties of SCS crude oil. Upon the introduction of 1000ppm VR-O, which is synthesized by using octadecylamine in the aminolysis reaction, the viscosity of SCS crude oil is decreased by 44.2% at 15 ℃ and 40.2% at 40℃. The computational study suggests significant energy level increase and shear stress decrease for VR-containing crude oil systems. 展开更多
关键词 South China Sea crude oil CHARACTERIZATION rheological properties Viscosity reduction
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Influence of Carboxyl Groups on the Particle Size and Rheological Properties of Polyacrylate Latices 被引量:3
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作者 张心亚 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2010年第3期492-498,共7页
The PAL was synthesized with BA,MMA and some monomers containing carboxyl groups(for example,acrylic acid(AA) and methacrylic acid(MAA)) as co-monomers by semi-continuous seeded emulsion polymerization technique... The PAL was synthesized with BA,MMA and some monomers containing carboxyl groups(for example,acrylic acid(AA) and methacrylic acid(MAA)) as co-monomers by semi-continuous seeded emulsion polymerization technique.The influences of alkalinization temperature,the feeding manner of AA or MAA on the particles size,rheological properties and carboxyl distribution of the latex were discussed,and the rheological mechanism was analyzed.The experimental results show that the PAL system has preferable viscosity and particle size when the alkalinization temperature is 50 ℃.Different distribution of carboxyl group in the particles and different resultant rheological properties are obtained by different feeding manner of AA or MAA into the system.The TEM images show that the particle is a smooth globe with carboxyl group concentrating on the surface and stabilized with electric double layer and nonionic adsorbed layer.The concentration of carboxyl functional group on the surface of particles can be achieved by the specific polymerization technique.The rheologyical properties are determined by accretion of particle volume and variation of the two phase volume ratio resulted from the carboxyl group spreading layer. 展开更多
关键词 polyacrylate latices acrylic acid methacrylic acid rheological properties
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RHEOLOGICAL PROPERTIES OF POLY(VINYLIDENE FLUORIDE) IN MOLTEN STATE 被引量:2
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作者 沈烈 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2008年第5期639-644,共6页
The theological behavior of poly(vinylidene fluoride)(PVDF)samples of different molecular weights was investigated by means of high pressure capillary rheometer and rotational rheometer.Information on the rheological ... The theological behavior of poly(vinylidene fluoride)(PVDF)samples of different molecular weights was investigated by means of high pressure capillary rheometer and rotational rheometer.Information on the rheological properties of such materials above melt temperatures is of interest as this can lead to an improved understanding of polymer behavior in processing and fabrication technologies.Shift factors derived from time-temperature superposition showed good fit to the Arrhenius equation with a flow activa... 展开更多
关键词 Poly(vinylidene fluoride) rheological properties Flow activation energy Plateau modulus.
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Rheological Properties of Asphalt Modified by Supramolecular UV Resistant Material-LDHs 被引量:2
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作者 王金山 吴少鹏 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2012年第4期805-809,共5页
Dynamic rheological properties of asphalt modified by Supramolecular UV resistant material—layered double hydroxides(LDHs) was studied by means of the dynamic shear rheometer(DSR) test.Two typical base asphalts w... Dynamic rheological properties of asphalt modified by Supramolecular UV resistant material—layered double hydroxides(LDHs) was studied by means of the dynamic shear rheometer(DSR) test.Two typical base asphalts were chosen and modified by 2 different LDHs contents.DSR tests were performed on the original samples,samples after exposed to outdoor and samples after the artificial accelerated UV aging tests respectively to analyze the rheological properties.It is found that when the LDHs content is between 3wt% and 5wt% of asphalt weight,the high temperature performance and fatigue resistant property of the modified asphalt become better,the UV aging resistance properties are improved. 展开更多
关键词 LDHs modified asphalt UV aging dynamic rheological properties
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Modelling the Rheological Properties of Epoxy Asphalt Concrete 被引量:2
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作者 Bo Yao Cheng Cheng +2 位作者 Xiao Wang Gang Cheng Song-Yu Liu 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2013年第6期106-111,共6页
This paper presents an investigation into modelling the rheological properties of epoxy asphalt concrete( EAC) by using the Huet-Sayegh model. Complex modulus tests were conducted on EAC specimens at various temperatu... This paper presents an investigation into modelling the rheological properties of epoxy asphalt concrete( EAC) by using the Huet-Sayegh model. Complex modulus tests were conducted on EAC specimens at various temperature and loading frequency conditions. Dynamic modulus and phase angles obtained from the complex modulus tests were used in the construction of the Huet-Sayegh model. The dynamic modulus master curve was developed by the Huet-Sayegh model as well as the Burgers model for comparison purpose. The results showed that EAC exhibits typical rheological behavior whose dynamic modulus decreases with the increase of temperature while increases with the increase of frequency,and phase angles increase with the decrease of frequencies and the increase of temperatures. The Huet-Sayegh model predicts the dynamic modulus master curve of EAC very well and much better than the Burgers model over a wide range of frequencies. 展开更多
关键词 epoxy asphalt concrete rheological properties complex modulus test Huet-Sayegh model
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Rheological Properties of Conductive Asphalt Binders Containing Graphite and Carbon Fiber Before and After Ageing 被引量:1
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作者 孙长军 TANG Ning +1 位作者 PAN Pan 吴少鹏 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2013年第3期557-559,共3页
Modified asphalt binders were prepared by adding conductive materials, graphite and carbon fiber. The rotation thin film oven test (RTFOT) and pressure age vessel test (PAV) were conducted to simulate the binder a... Modified asphalt binders were prepared by adding conductive materials, graphite and carbon fiber. The rotation thin film oven test (RTFOT) and pressure age vessel test (PAV) were conducted to simulate the binder aging in the field. Rheological properties of graphite and carbon fiber modified asphalt binder were investigated by the empirically rheological properties (penetration and softening point) and the dynamic shear rheometer (DSR) test. Results show that physical properties of asphalt binder change with conductive material mixed. DSR tests present that the values of complex modulus increase while phase angles decrease under a proper amount of graphite and carbon fiber. Rutting parameters point out that graphite can improve the rutting resistance of asphalts. Rheological parameters can be used to assess aging. 展开更多
关键词 GRAPHITE carbon fiber rheological properties AGING
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Research on deepwater synthetic drilling fluid and its low temperature rheological properties 被引量:1
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作者 Hu Youlin Yue Qiansheng +2 位作者 Liu Shujie Fu Zaiguo Liang Shan 《Petroleum Science》 SCIE CAS CSCD 2011年第4期485-489,共5页
With the rapid development of deepwater drilling operations,more and more complex technical challenges have to be faced due to the rigorous conditions encountered.One of these challenges is that the drilling fluid use... With the rapid development of deepwater drilling operations,more and more complex technical challenges have to be faced due to the rigorous conditions encountered.One of these challenges is that the drilling fluid used must had good rheological properties at low temperatures and high ability to inhibit hydrate formation.Synthetic drilling fluid has been widely applied to deepwater drilling operations due to its high penetration rate,excellent rheological properties,good ability to prevent hydrate formation,and high biodegradability.A synthetic drilling fluid formulation was developed in our laboratory.The rheological properties of this drilling fluid at low temperatures (0-20 °C) were tested with a 6-speed viscometer and its ability to inhibit hydrate formation was evaluated at 20 MPa CH 4 gas and 0 °C by differential scanning calorimetry (DSC).Several factors influencing the low temperature rheological properties of this synthetic drilling fluid were studied in this paper.These included the viscosity of the base fluid,the amount of CEMU and organic clay,and the water volume fraction. 展开更多
关键词 Deepwater drilling synthetic drilling fluid low temperature rheological properties gas hydrate
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The Rheological Properties of Ultra-fine High Performance Grouting Cement 被引量:1
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作者 管学茂 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2001年第4期48-52,共5页
The material properties of surface and powder, rheological property, and mineral composition were investigated by means of SEM, XRD, Malvern laser granulometer and rotary, viscometer. The influence of a admixture on u... The material properties of surface and powder, rheological property, and mineral composition were investigated by means of SEM, XRD, Malvern laser granulometer and rotary, viscometer. The influence of a admixture on ultra-fine cement rheological properties and its mechanism, were studied in material theories. The results show that the ultra-fine fly ash has a higher zeta potential, and improves flowability of ultra-fine cement paste, decreases flowability loss as time prolonging, improves compatibility between superplasticizers and cement because of the electrostatic repulsion, ball bearing effect, filling and dispersing effect of admixtures and delay-releasing effect of superplasticizers. 展开更多
关键词 high performance grouting cement ultra-fine grouting cement rheological properties
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Rheological Properties of Cement-Based Grouts Determined by Different Techniques 被引量:5
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作者 Mohammed Hatem Mohammed Roland Pusch +1 位作者 Sven Knutsson Gunnar Hellstrom 《Engineering(科研)》 2014年第5期217-229,共13页
The rheological properties of cement-based grouts containing talc or palygorskite were investigated for optimizing fluidity and quick strengthening at injection. The fluidity controls the ability of grout to penetrate... The rheological properties of cement-based grouts containing talc or palygorskite were investigated for optimizing fluidity and quick strengthening at injection. The fluidity controls the ability of grout to penetrate fractures and can be determined by pipe flow tests, Marsh funnel tests, mini-slump cone tests and rheometer tests. The grouts were 1) Talc for fluidity and strength by reacting with cement, 2) Palygorskite (attapulgite) for early gelation by being thixotropic, and 3) Powdered quartz for chemical integrity. The freshly prepared grouts behaved as Bingham fluids with viscosities from 0.151 to 0.464 Pas and yield stresses 5.2 Pa to 36.7 Pa. Statistical analysis of the flow test data converted Marsh flow time into viscosity. The pipe flow tests gave 26.5% higher values than the viscometer for grout with Portland cement and talc, and about 13.7% lower than the viscometer data for the grout with low-pH cement and talc. The big Marsh funnel gave values differing by 5.2% - 5.3% from those of the viscometer for grout with talc and Portland, and Merit 5000 cements. For grout with palygorskite the viscosity was at least twice that of the other grouts. Grout fluidity was positively affected by talc and negatively by palygorskite and early cement hydration. 展开更多
关键词 Cement-Grout Marsh Funnel Quartz Powder rheological properties Thixotropic
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Rheological properties and microscopic mechanism of waste cooking oil activated waste crumb rubber modified asphalt 被引量:4
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作者 Xinjun Feng Hui Liang Zijian Dai 《Journal of Road Engineering》 2022年第4期357-368,共12页
In this paper,the surface activated crumb rubber with waste cooking oil(WCO)was studied to improve the performance of crumb rubber modified asphalt.The activated waste crumb rubber modified asphalt(OCRMA)with differen... In this paper,the surface activated crumb rubber with waste cooking oil(WCO)was studied to improve the performance of crumb rubber modified asphalt.The activated waste crumb rubber modified asphalt(OCRMA)with different amount of crumb rubber was prepared to study the microscopic appearance of OCRMA by scanning electron microscope and fluorescence microscope and analyze the surface performance.The rheological properties and microscopic mechanism of OCRMA were characterized by dynamic shear rheological test,multiple stress creep recovery(MSCR)test,BBR test and infrared spectroscopy.The results show that the dissolution degree of waste crumb rubber is improved after WCO activation,and the compatibility with asphalt components is enhanced,and the stable cross-linking structure is formed,which improves the asphalt performance.The several new absorption peaks,which were obvious,were all caused by the composition of WCO,that is,there was no significant chemical change during the interaction between the activated crumb rubber and base asphalt.Compared with the common waste crumb rubber modified asphalt(CRMA),activation with WCO can significantly reduce the viscosity of CRMA,decrease the difference of segregation softening point by 27%,and enhance the low temperature performance by 30%.The aging degree is greatly reduced,and the anti-aging performance of OCRMA is increased by about 20%with the same dosage.The high temperature performance,though higher than that of base asphalt,decreases to some extent.After comprehensive analysis,the optimal dosage of crumb rubber for OCRMA is 30%. 展开更多
关键词 Waste crumb rubber Waste cooking oil Surface activated crumb rubber rheological properties Microcosmic mechanism
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Thermal behavior and Rheological Properties of PANI-DBSA/PAN Blends
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作者 潘玮 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2007年第1期153-155,共3页
Conducting blends of polyacrylonitrile (PAN) copolymer and dodecylbenzene sulfonic acid doped polyaniline (PANI-DBSA) were prepared by solution blending of the two components. By means of various characterization ... Conducting blends of polyacrylonitrile (PAN) copolymer and dodecylbenzene sulfonic acid doped polyaniline (PANI-DBSA) were prepared by solution blending of the two components. By means of various characterization methods including differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), transmission electron microscopy (TEM) and cone-plate rheometry, the effects of PANI-DBSA content on the thermal behavior, morphological and rheological properties of the blends were investigated. A single and composition-dependent /'g was found for each of all blends and the thermal stability of PANI-DBSA/PAN was superior to that of both pure Co-PAN and PANI- DBSA. Rheological results show that the apparent viscosity of blend solution decreased at low PANI- DBSA content (2.5 wt%) while increased at high PANI-DBSA content (7.5wt%-10 wt%). Moreover, the shear-thinning appeared more distinctly with the incorporation of PANI-DBSA into the blend solutions especially at a high shear rate. 展开更多
关键词 POLYANILINE POLYACRYLONITRILE BLEND thermal behavior rheological properties
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Estimation of Rheological Properties of RAP Binder
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作者 马涛 HUSSAIN U Bahia 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2010年第5期866-870,共5页
The low-temperature rheological properties of binders in the recycled asphalt pavement (RAP) material without the damaging effects of solvent extractions were analyzed. The developed procedure is based on testing of... The low-temperature rheological properties of binders in the recycled asphalt pavement (RAP) material without the damaging effects of solvent extractions were analyzed. The developed procedure is based on testing of bitumen-RAP mortars produced by mixing the fresh (virgin) binder with RAP material smaller than # 8 sieve. Different mortars were prepared, containing RAP material passing the #8 sieve and 15% by weight of fresh binder. Low temperature properties of these mortars were investigated by using the bending beam rheometer (BBR) test procedure that is specially modified for testing of the RAP mortars. The modification involved the development of a new kind of mold and different testing parameters. The RAP material used in the experimental study were both extracted from real reclaimed pavement and prepared in the laboratory, by aging binder through repeated PAV cycles. The results indicate the new procedure can capture the effect of aged properties of bitumen in the RAP and can be used to estimate the PG low temperature grade of the blended binder. Although data is limited in size, the modification of the BBR appears to be simple and provide repeatable data. 展开更多
关键词 RAP BINDER rheological properties AGING bending beam rheometer
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Comparative Analysis of Rheological Properties and Modification Mechanism of SBS-Graphene Composite Modified Binder 被引量:1
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作者 Jiangmiao YU Nikun YANG +2 位作者 Huayang YU Svetlana Shekhovtsova Evgenii Korolev 《Research and Application of Materials Science》 2020年第1期48-58,共11页
SBS(styrene-butadiene-styrene block copolymer)has been widely used in pavement industry as an asphalt modifier.Nanomaterials can further enhance the performance of SBS modified asphalt.However,rare studies investigate... SBS(styrene-butadiene-styrene block copolymer)has been widely used in pavement industry as an asphalt modifier.Nanomaterials can further enhance the performance of SBS modified asphalt.However,rare studies investigate the feasibility of using graphene as a performance enhancer of SBS modified asphalt.To fill this gap,comprehensive experimental tests including chemical and mechanical test were carried out on SBS-graphene modified asphalt and SEBS(styrene-ethylene-butylene-styrene block copolymer,which is a hydrogenated polymer of SBS)modified asphalt.Graphene with different dimensions and contents was taken into consideration in this study.Based on the experimental work,it can be concluded that graphene improves the mid-temperature performance of SBS modified asphalt.Compared with two-dimensional graphene,three-dimensional graphene has a greater advantage and the enhancement effect increases with the increase of its dosage.In addition,the cross-linked structure of SBS-graphene composite improves the distribution of SBS in asphalt,which improves the overall performance of SBS modified asphalt. 展开更多
关键词 SBS-graphene modified asphalt chemical analysis rheological properties
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Rheological Properties of Konjac Glucomannan/SiO_2/Organic-Borate Gels
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作者 吴力立 张超灿 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2009年第4期575-580,共6页
A series of thermoreversible konjac glucomannan gels crosslinked by organic borate were prepared. Required amount of hydrophilic SiO2 was added into the konjac glucomannan solutions before the crosslinking reaction, T... A series of thermoreversible konjac glucomannan gels crosslinked by organic borate were prepared. Required amount of hydrophilic SiO2 was added into the konjac glucomannan solutions before the crosslinking reaction, The gel network was formed through the crosslinking reaction between borate ions dissociated from organic borate and the cis-diol hydroxyl groups on the mannose units of polysaccharide chains. The rheological properties of the complex gels were studied by dynamic viscoelastic measurement. The gelation kinetics of the complex gels was studied and the critical getation points of the gels were exactly determined by the Winter-Chambon criterion. The effects of temperature and composite ratio on the shear storage modulus (G'), the loss modulus (G") and the sol-gel transition points were investigated. 展开更多
关键词 konjac glucomannan SI02 organic borate rheological properties
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EFFECT OF PAN-MILLING ON RHEOLOGICAL PROPERTIES OF HIGH DENSITY POLYETHYLENE
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作者 Hua Huang Polymer Research Institute, Sichuan University, Chengdu 610065, China 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2000年第5期397-403,共7页
The effect of pan-milling on the rheological properties of high density polyethylene (HDPE) was studied. An innovative milling apparatus, viz. an inlaid pan-mill, was used. Melt indexer, capillary rheometer, Haake Rhe... The effect of pan-milling on the rheological properties of high density polyethylene (HDPE) was studied. An innovative milling apparatus, viz. an inlaid pan-mill, was used. Melt indexer, capillary rheometer, Haake Rheocord 90 single-screw extruder and Brabender rheometer were used to evaluate the rheological properties of HDPE. HDPE with higher initial molecular weight and larger particle size was easier to degrade under pan-milling stress, as indicated by the melt index. Pressure oscillation in capillary flow occurred at significantly higher shear stress and shear rate for milled HDPE than for unmilled HDPE. The apparent shear viscosity of HDPE decreased with increasing times of milling. After milling, the flow activation energy decreased and thus the sensitivity of viscosity to temperature was reduced. Die pressure and torque during single screw extrusion were reduced significantly after milling. Plasticizing time as measured in a Brabander mixer decreased markedly with increasing milling times. 展开更多
关键词 high density polyethylene rheological properties PAN-MILLING
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Mechanical and Rheological Properties of Bamboo Pulp Fiber Reinforced High Density Polyethylene Composites:Influence of Nano CaCO_(3)Treatment and Manufacturing Process with Different Pressure Ratings
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作者 Cuicui Wang Xin Wei +3 位作者 Lee MSmith Ge Wang Shuangbao Zhang Haitao Cheng 《Journal of Renewable Materials》 SCIE EI 2022年第7期1829-1844,共16页
In order to investigate the effect of the relative motion of nano CaCO_(3)reinforced bamboo pulp fiber(BPF)/HDPE composite components on the mechanical performance,a comparative study was performed.BPF was treated by ... In order to investigate the effect of the relative motion of nano CaCO_(3)reinforced bamboo pulp fiber(BPF)/HDPE composite components on the mechanical performance,a comparative study was performed.BPF was treated by nano CaCO_(3)blending(BM)and impregnation modification(IM)technology.The composites were produced using hot press(HPMP),extrusion(EMP)and injection molding process(IMP).The physical morphology of BPF was similar at different manufacturing processes.Compared to the samples manufactured by HPMP,a decrease in the(specific)flexural strength of BPF/HDPE composites and an increase in those of composites treated by nano CaCO_(3)manufactured by EMP and IMP were observed.The injection molded composites exhibited the best values in the(specific)impact strength,(specific)tensile properties.IM had a greater effect on the rheological behavior of the composites than BM,and nano CaCO_(3)treatment most effectively affected the performance of the extrusion molded composites. 展开更多
关键词 Nano CaCO_(3) bamboo pulp fiber composites manufacturing process mechanical properties rheological properties
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Some Influencing Factors on Rheological Properties of Bauxite-based Castable Matrix
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作者 LIU Xinhong FENG Long ZHANG Lei YE Fangbao ZHONG Xiangchong 《China's Refractories》 CAS 2012年第3期20-24,共5页
The effects of corundum, magnesia and spinel additions on theological properties of matrix of bauxite- based castables were studied using bauxite, fused white corundum, magnesia, spinel, microsilica, ultra-fine α-Al2... The effects of corundum, magnesia and spinel additions on theological properties of matrix of bauxite- based castables were studied using bauxite, fused white corundum, magnesia, spinel, microsilica, ultra-fine α-Al2O3 and cement as starting materials and trimeric sodium phosphate as dispersant. The results show: (1) the matrix slurry of bauxite-based castables belongs to Bingham fluid and shows thixotropy behaior ; (2) appropriate corundum addition improves theological properties the matrix; ( 3 ) magnesia addition is detrimental to matrix theological properties; (4) spinel addition has slightly negative effects on matrix theological properties. 展开更多
关键词 BAUXITE CORUNDUM MAGNESIA SPINEL rheological properties
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Synthesis of LDHs and Rheological Properties of Laponite/LDHs Dispersions
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作者 Pei Zhi GUO, De Jun SUN, Jie ZHANGKey Laboratory for Colloid & Interface Chemistry of Education Ministry, Shandong University, Jinan 250100 《Chinese Chemical Letters》 SCIE CAS CSCD 2003年第9期973-976,共4页
The chemical composition, morphology of the particles of positively charged layered doubl?hydroxides (LDHs) were studied by ICP, Mastersizer, TEM. The preliminary results indicated that with adding LDHs to 1% laponite... The chemical composition, morphology of the particles of positively charged layered doubl?hydroxides (LDHs) were studied by ICP, Mastersizer, TEM. The preliminary results indicated that with adding LDHs to 1% laponite dispersion the yield stress of laponite/LDHs mixed dispersions increased at first, then decreased dramatically to a minimum, and the yield stress rose again when LDHs increased further. 展开更多
关键词 LAPONITE layered double hydroxide rheological properties.
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