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Experimental assessments of methanol-based foaming agent in latex modified foamed binders and warm asphalt mixtures

Journal of Road Engineering 2022年第1期2卷 84-97页

作者： Mohd Rosli Mohd Hasan Tai Guo Hainian Wang Zul Fahmi Mohamed Jaafar Zhanping You School of Civil Engineering Universiti Sains Malaysia(Engineering Campus)Nibong Tebal 14300Pulau PinangMalaysia School of Highway Chang'an UniversityXi'an 710064China Department of Civil and Environmental Engineering Michigan Technological UniversityHoughtonMI 49931USA

Latex is one of the natural rubbers that is used to enhance the performance of asphalt pavement for the last few decades.The presence of latex,which is categorized as an elastomer,helps to improve pavement performance and durability.Conversely,higher viscosity of latex modified asphalt binder increases the production-temperatures of asphalt mixture,thus consuming higher energy during asphalt mixture’s production stage.In this study,the effectiveness of methanol as an energy-efficient foaming agent was assessed to reduce the viscosity and enhance the workability of the modified asphalt binder.The basic and rheological properties of the asphalt binders were determined through multiple laboratory tests including expansion ratio and half-life,rotational viscosity,softening point,torsional recovery,and dynamic shear rheometer.The properties of asphalt mixtures were assessed through the service characteristics,mechanical performance,and moisture resistance criteria.It was found that the presence of latex results in an approximately twofold higher expansion ratio and a lower half-life of the asphalt binder at about the same ratio.Through the rotational viscosity test,the application of methanol into asphalt binder decreased the viscosity and led to better workability,despite the addition of latex as an asphalt modifier.The application of methanol into asphalt binder improved the workability of mixture samples and lowered the compaction energy of the compaction process,which are the crucial criteria for a better mixing and compaction process.Methanol foamed asphalt mixtures with latex show much higher resistance to moisture damage and stiffness than control sample even though they were prepared at a lower temperature.

关键词： foaming agent foaming technique Latex Lower energy Methanol Natural rubber

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Carbonates as foaming agent in Chip-based Aluminium Foam Precursor

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Journal of Materials Science & Technology 2010年第9期26卷 845-850页

作者： Marco Haesche Dirk Lehmhus Jrg Weise Manfred Wichmann Irene Cristina Magnabosco Mocellin University of Bremen Fraunhofer IFAM Federal University of Santa Catarina Florianópolis

Replacement of TiH2 as foaming agent by CaCO3（lime） and CaMg（CO3）2（dolomite） for AlMg4.5-and AlSi9Cu3-foams was investigated considering inluences on foaming capability and cellular structure.Precursor materials were produced from alloy chip and powder mixtures by means of the thixocasting process.AlSi9Cu3 variants showed expansion levels suffcient for commercial use.Variations in expansion observed when CaCO3 and CaMg（CO3）2 were compared as foaming agent are explained based on the course of decomposition.Improved performance of dolomite-based foams relies on formation of stabilizing MgO phases,which do not develop during decomposition of CaCO3 in Al-Si-Cu alloys

关键词： Aluminium foam foaming agent Calcium carbonate Dolomite Stabilisation

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Novel foaming agent used in preparation process of aluminum foams

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Journal of University of Science and Technology Beijing 2008年第6期15卷 735-739页

作者： Xiangyang Zhou Xiquan Liu Jie Li Hongzhuan Liu School of Metallurgical Science and Engineering Central South University Changsha 410083 China

The performances of a novel foaming agent used in the preparation process of aluminum foams were investigated, and the effects of some factors, such as addition of the foaming agent, foaming temperature on the porosity, and appearance of aluminum foams were also discussed. Experimental results show that the novel foaming agent has a wide decomposition temperature range and a mild decomposed rate; the foaming agent has the ability to enhance the viscosity of aluminum melt, as a result, an extra viscosifier such as Ca or SiCp is unnecessary while using this foaming agent; the bubble-free zone in material decreases and the foaming effi- ciency increases with the increase of foaming agent; the bubble-free zone disappears and the foaming efficiency is near 100% when the addition of foaming agent is more than 1.4wt%; the porosity of the aluminum foam increases with the increase of foaming agent when the addition of foaming agent is less than 2.2wt%.

关键词： aluminum foam foaming agent porosity viscosity foaming efficiency

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Effect of foaming agent,foam stabilizer and whipping time on drying process of tomato paste under different drying equipment

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International Journal of Modeling, Simulation, and Scientific Computing 2017年第2期8卷 72-86页

作者： Adesoji Matthew Olaniyan John Adeyemi Adeoti Musiliu Olusola Sunmonu Department of Agricultural and Bioresources Engineering Faculty of Engineering Federal University Oye Ekiti P.M.B.373Oye Ekiti 371101Ekiti StateNigeria Department of Agricultural and Biosystems Engineering Faculty of Engineering and Technology University of Ilorin P.M.B.1515Ilorin 240003Kwara StateNigeria

Laboratory experiments were conducted to determine the effect of foaming agent(egg white(EW)),foam stabilizer(carboxyl methyl cellulose(CMC))and whipping time on drying rate and quality of tomato(Lycopersicon esculentus)paste dried under air oven,microwave oven and mechanical dryer.A 43 factorial experiment in Randomized Complete Block Design(RCBD)was used to study the effect of four levels each of foaming agent(5%,10%,15%and 20%EW),foam stabilizer(0.15%,0.30%,0.45%and 0.60%CMC)and whipping time(3,5,7 and 9 min)on the drying rate and the quality of foam-mat dried tomato powder in the three drying equipment.Each trial was performed in triplicates making a total number of 576 samples that were individually tested and measured.25 g sample of the paste was dried to a moisture content of 7.60%(wb)for 8 h in mechanical dryer and oven dryer at temperatures of 55◦C and 50◦C,respectively,and 10 min in microwave oven at 540 W.Data obtained from the experiments were statistically analyzed using the analysis of variance(ANOVA)while the Duncan’s Multiple Range Test was used to compare the means.Results showed that the drying rate increased with increase in foaming agent,foam stabilizer and whipping with minimum values of 9.21 g/h obtained in mechanical dryer,9.31 g/h in air oven and 8.05 g/h in microwave oven.Increase in foaming agent,foam stabilizer and whipping time did not cause any adverse effect on vitamin C,ash,protein,fat,carbohydrate,crude fiber contents of the samples.Samples reached a stable moisture content of 7.60%(wb)in less than 8 h in mechanical dryer and air and less than 10 min in microwave oven.The results of the study showed that EW,CMC and whipping time influenced the drying rate and quality of foam-mat dried tomato powder.

关键词： foaming agent foam-mat drying foam stabilizer drying rate equipment tomato.

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Preparation and Properties of Alkali Activated Foam Cement Reinforced with Polypropylene Fibers

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Journal of Wuhan University of Technology(Materials Science) 2011年第5期26卷 960-964页

作者：王立久谭晓倩 Institute of Building Materials School of Civil and Hydraulic EngineeringDalian University of Technology

A new form of foam cement was produced by mixing alkali-activated slag,clay,a small amount of polypropylene fibers with prepared foam during stirring.The preparation of the material is quite different from the normal one,which is produced just at room temperature and without baking.The fabrication of this energy-saving and low-price material can be favorable for lowering carbon emission by using recycled industrial wastes.Thermal conductivity of 0.116 W/（m·k）,compressive strength of 3.30 MPa,flexural strength of 0.8 MPa and density of 453 kg/m3 can be achieved after 28 days aging.The hydration product is C-S-H with less Ca（OH）2,calcium aluminum and zeolite,which was characterized by X-ray diffraction（XRD） measurement.This prospective foam cement may be expected to be an excellent economical energy-saving building material.

关键词： foaming agent alkaline cement polypropylene fiber strength thermal conductivity

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Study on the Influences of foaming Gypsum’s Performance

Study on the Influences of Foaming Gypsum’s Performance

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中国材料大会2012

作者： Bin Huang Yi Zhang Dongxu Li College of Materials Science ＆ Engineering Nanjing University of Technology

ISBN: (纸本)9783037856062;3037856068

Utilizing the chemical reaction principles H2O2 was catalyzed by MnO2 , instead of being catalyzed by warm water. In the gypsum slurry, due to the chemical reaction of hydrogen peroxide a large number of bubbles were produced, and the material was self-foaming. The H2O2 foaming agent and the method of foaming affected the performance of the foaming gypsum, such as mechanical strength, apparent density, thermal conductivity, and the pore structure of foaming gypsum. The result showed that with adding H2O2 , the apparent density and mechanical strength decreased;the different water/plaster weight ratio ranged from 0.65 to 0.75, affecting the foaming process. The thermal insulation property of FGD gypsum is related to the content of H2O2 , the water/plaster weight ratio, and the pore structure of foaming gypsum.

关键词： foaming agent Bulk density Porosity Pore structure Thermal conductivity.

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英文摘要

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石油与天然气化工 2012年第3期41卷 357-362页

The article presents abstracts of papers on chemical engineering of oil and gas, including a traceable calibration procedure for hydrocarbon dew point chilled mirror instruments and research direction and challenges f... 详细信息

关键词： acidizing air oxidation amine value ammonia or ammonium salt analysis anti-swelling agent anti-swelling performance anti-swelling rate anticorrosion coating ASP produced water average particle size bimodal calibration casing--damaged well catalyst cement chimney clay minerals CO2 comparison research complex gas components core damage corrosion inhibitor CPS crude sewage desulphurization determination diversion ejector energy development energy efficiency benchmarking evaluation FCC foam drainage foam mass foam stabilizer foamed acid foaming agent function design Gas field gathering pipelines H2S high temperature high-sulfur hydrocarbon dew point hydrocarbon dew point chilled mirror instruments incinerator inspection integrated equipment kinetic hydrateinhibitors LaFeO3 liquefied petroleum gas dispenser liquid loading load low permeability and low pressure LPG mechanical strength methane methane hydrates metrological verification microbial flocculant multifunctional activated acid natural gas natural gas desulfurization natural gas hydrate network management platform new technology offshore oilfield oil yield oilfield application operation operation points parameter optimization performance evaluation perovskite oxide compound plugging plugging causes analysis polymer polymer-surfactant displacement pore distribution prevention measures removal rate of solid suspensions replacement rate response of performance retarder rotating-strip-port round-port scale inhibitor scaling screening silica gel slight expansion SO2 solid-liquid separation treatment solubilization sour gas field sulfur recovery system construction tail gas treatment hydro-treating heater technical summary thermodynamics titration method traceability transport pipeline treatment technology uncertainty of measurement viscosity waste drilling fluid water content water injection water producing water sensitivity damage water-sensitivity

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Foam concrete:State of the art in foaming agents

Foam concrete:State of the art in foaming agents

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作者： Guoxing Sun Tomi Nissinen Ivan M.L.Sham Nano and Advanced Materials Institute Limited(NAMI)

The application of foaming agents for the fabrication of foam concrete has been practiced more than 50 years in China.The beneficial use of foamed concrete in construction industry can be justified due to improved thermal and acoustic insulation of buildings with associated reduction of dead loads on structures and foundations.Desirable properties of foam require the foaming agent to be synthesized with high foam production ratio,good foam stability and small bubble size in alkaline cement pastes.This paper provides a review of foam constituents,fabrication techniques,classification,and applications in foam concrete.The review also provide a comprehensive insight into possible development of foam in the construction industry today.

关键词： foaming agent foam concrete surfactant

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Preparation of Porous Hydroxyapatite Scaffolds

Preparation of Porous Hydroxyapatite Scaffolds

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The 3～〔rd〕International Conference on High-Performance Ceramics(CICC-3)（2）

作者： Jiemo Tian Xiaoyan Wang Limin Dong Chen Wang and Wei XuState Key Laboratory of Fine Ceramic and Processing Institute of Nuclear Energy Technology Tsinghua University Beijing 100084 China

＜正＞ Porous hydroxyapatite （HA） ceramic scaffolds were prepared using three-dimensional （3-D） gel-lamination technology with sodium lauryl sulfate as foaming agent and lauryl as foaming stabilizing agent. With gelling system of sodium alginate and calcium chloride, the foamy HA slurry was gelled layer by layer on the 3-D gel-lamination machine to prepare the porous ceramic scaffolds. The viscosity of the foamy ceramic slurry was examined. After sintering, the porous HA bioceramic was characterized in terms of the porous microstructure and mechanical properties. The experimental results demonstrated that the resultant porous ceramic with appropriate pore size, porosity characters, mechanical properties and bioactivity could be obtained.

关键词： Hydroxyapatite 3-D Gel-lamination foaming agent

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