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Showing 1 to 20 of 36 for “"Curing Temperature"”.
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Effects of Curing Temperature and Pressure on the Chemical, Physical, and Mechanical Properties of Portland Cement
… of Portland cement as well as the effects of curing temperature and pressure on its various properties. An innovative test apparatus has been developed in this study to cure and test cement paste specimens under in-situ conditions, such as down-hole in oil wells with high temperature and high …
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Influence of Curing Temperature on Strength of Cement-treated Soil and Investigation of Optimum Mix Design for the Wet Method of Deep Mixing
… a cement-water slurry. To study the influence of curing temperature on the strength of the treated soil, specimens were cured in temperature-controlled water baths for the desired curing time. After curing, unconfined compressive strength (UCS) tests were conducted on the specimens. To investigate …
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Liquid Crystal Materials And Tunable Devices For Optical Communications
… applications in fiber-optic communications. The curing temperature is found to have significant effects on the PSLC performance. The electro-optic properties of nematic polymer network liquid crystal (PNLC) at different curing temperatures are investigated experimentally. At high curing …
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An investigation of several variables in the strength of shell molds
… difference between the effects of different curing temperatures on the strength of shell molds, A curing temperature of 500°F is more desirable than one of 600°F.
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Influences of Curing Conditions and Organic Matter on Characteristics of Cement-treated Soil for the Wet Method of Deep Mixing
… in-situ soil and binder, mixing conditions, and curing conditions.The study presented herein aims to investigate the influences of curing time, curing temperature, mix design proportion, organic matter in the soil, and curing stress on the strength of cement-treated soil. Fabricated and natural …
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Laboratory specimen preparation for cold recycled asphalt
… amount of recycling binder, compaction effort, curing time and temperature, amount of new aggregate and water content. Laboratory test procedures and/or in-situ tests are needed to assess the effects. This project aims at finding a method for laboratory sample preparation for cold recycled …
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Steam Cured Self-Consolidating Concrete and the Effects of Limestone Filler
… silica fume and steam cured at a maximum holding temperature of 55°C. This research also examines the resistance to delayed ettringite formation when the concrete is steam cured at 70°C and 82°C and its secondary consequences on the freeze-thaw resistance. The effect of several experimental …
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Synthesis and Photopolymerization of Novel Dimethacrylates
… exhibited lower viscosities and glass transition temperatures than the control, which was attributed to the elimination of the hydrogen bonding. The monomers were photopolymerized in a differential scanning calorimetry modified with an optics assembly (DPA 7; Double Beam Photocalorimetric …
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Setting and nanostructure of slag-fly ash binders
Slag fly ash binders (SFB) are room temperature hardening binders that have high strength, reasonable setting time, and lower carbon footprint when compared to ordinary Portland cement (OPC). The precursors for SFB are industrial byproducts, namely slag and fly ash. The inexpensive nature of the …
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Estabilização de um solo fino laterítico pelo ácido fosfórico
… of solution used in compacting the soil; III- Curing time; IV- Compaction energy; V- Curing temperature. A few other secondary studies were also performed: a) tensile strength from diameter compression tests; b) unconfined compression tests of soil treated with Portland cement, to compare with …
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Modification, curing and flame retardation of epoxy resin networks
… epoxy resins were investigated. The influence of curing temperature and time on morphological development and fracture behavior was also studied. Arylamine functionalized poly(arylene ether sulfone)s of controlled molecular weight were synthesized as soluble, but reactive thermoplastic modifiers …
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Development of Predictive Modeling for the Reduction of Escherichia Coli During the Curing Time of American Type Cheese
… the decline of viable Escherichia coli in the curing of American Type cheese. Pasteurized whole milk was inoculated with 100 to 1000 E. coli biotype I /ml and was used to manufacture Cheddar and Colby-like cheeses. Multiple regression design was employed to determine the effects of low to high …
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Thermal curing of concrete with conductive polymer technology.
… strength development is dependant on two primary curing factors, time and temperature. Increasing the rate of strength development of concrete by elevating the curing temperature at early ages has advantages of maximising concrete production and reducing manufacturing time. Increasing the …
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Engineering properties of sulphate-bearing clay soils stabilised with lime-activated ground granulated blast furnace slag (GCBS)
… substantial strength increase even after short curing periods (up to 12 weeks). This increase in strength is more pronounced if curing is at elevated temperatures (30 °C). The presence of sulphates (6% gypsum=2.73% SO<sub>3</sub>) resulted in an accelerated increase in the strength development …
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Improving the Sustainability of Performance-Based Concrete Overlay Mix Design made with Rounded Aggregate
… content. In the second phase, the effect of curing temperature on the correlation between compressive strength and non-destructive testing (NDT) methods is examined. Establishing reliable NDT-strength relationships under varying thermal conditions will improve the accuracy of in-situ …
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Fabrication, characterisation and properties of polysiloxane rice husk silica composites
… i.e; composition of fillers (2wt% to 12wt%) and curing temperatures (room temperature (RT), 65 and 100˚C). Addition of 10wt% RHA SiO2 had found to contribute better performance compared to CS addition, accredited to RHA SiO2 density and surface morphology. As for the fabrication effects, CO …
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Characterization of Cure Kinetics and Physical Properties of a High Performance, Glass Fiber-Reinforced Epoxy Prepreg and a Novel Fluorine-Modified, Amine-Cured Commercial Epoxy.
Kinetic equation parameters for the curing reaction of a commercial glass fiber reinforced high performance epoxy prepreg composed of the tetrafunctional epoxy tetraglycidyl 4,4-diaminodiphenyl methane (TGDDM), the tetrafunctional amine curing agent 4,4'-diaminodiphenylsulfone (DDS) and an ionic …
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Synthesis and Characterization of Phenylethynyl Terminated Poly(arylene ether sulfone)s as Thermosetting Structural Adhesives and Composite Matrices
High temperature, solvent resistant materials which also display good mechanical properties are desired for use as aerospace structural adhesives and polymer matrix/carbon fiber composites. High molecular weight amorphous poly(arylene ether sulfone) thermoplastic materials display many of these …
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Spectroscopic Characterization of Molecular Interdiffusion at a Poly(Vinyl Pyrrolidone) / Vinyl Ester Interface
… reaction, ATR experiments were carried out at temperatures below the normal curing temperature. Diffusion coefficients were determined by following variations in infrared bands as a function of time, and fitting this data to a Fickian model. The values of the diffusion coefficients calculated …
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Cementitious stabilization of soils in the presence of sulfate
… water bath at 40°C, sealed plastic bag at room temperature, and air. Molds were prepared with 5% to 20% cementitious material. The cementitious materials were Type I Portland cement, lime, and supplementary cementing materials (SCM) such as granulated blastfurnace slag (BFS), Class C fly ash …
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