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Online since: November 2019
Authors: Hussein Marey Mahmoud
Introduction
Historical literature data claim that lime-based mortars and plasters were first used by the ancient Greeks, while the significant development in lime production was made by the Romans in the 2nd-century BC [1].
A desirable reduction in water absorption and porosity of the treated samples was also notified.
A desirable reduction in water absorption and porosity of the treated samples was also notified.
Online since: August 2019
Authors: Leopold Mbereyaho, Paul Claudel Kwizera, Tudor Bigabo Munyampundu, Abdoul Karim Mutwarasibo
Unfortunately, the continuous and intense consumption of ordinary concrete raw materials especially its aggregates (gravel and sand), is resulting in their gradual reduction in the nature, as well as in environmental degradation and pollution related to aggregates extraction.
Acknowledgements Authors sincerely thank the leadership of NPD Ltd and Rutongo Mining Ltd for permission to visit and collect data and samples at their working sites, at manufacturing plant and mining zones respectively, as well as to use their respective laboratory facilities.
Acknowledgements Authors sincerely thank the leadership of NPD Ltd and Rutongo Mining Ltd for permission to visit and collect data and samples at their working sites, at manufacturing plant and mining zones respectively, as well as to use their respective laboratory facilities.
Online since: October 2011
Authors: Li Xin Bao, Fei Yu Wang
In mortar, join to reduce water dose, reduce water / cement than, under the condition of identical floating degree, take reduction, unit water is measured , reduces the dry trend that contracts , raises the role of endurance.
Conclusions (1) from Table 1 and Fig.1 and 2, can know , test regular 1 ~ fight in 9 to fold strength, compressive strength, expansion shrinkage, Mi water rate and other data wait for basic identical, floating degree and development degree can also satisfy design ask basically, but the mortar that developed in test the funnel of regular 3 and test regular 4 flow out value expand value effect with SL( Self-Leveling) is best , so, is best burden with test regular 3 and test regular 4
Conclusions (1) from Table 1 and Fig.1 and 2, can know , test regular 1 ~ fight in 9 to fold strength, compressive strength, expansion shrinkage, Mi water rate and other data wait for basic identical, floating degree and development degree can also satisfy design ask basically, but the mortar that developed in test the funnel of regular 3 and test regular 4 flow out value expand value effect with SL( Self-Leveling) is best , so, is best burden with test regular 3 and test regular 4
Online since: November 2011
Authors: Zhi Yuan Shen, Li Jun Yang, Meng Xi Liu, Chun Xi Lu, Xiao Na Liu
As a new research field, especially directed at the process of oil refining industry, GSALR not only can be used as stripper in fluid catalytic cracking unit (FCCU) to remove oil gas from deactivated catalyst or NOx from regenerated catalyst [5], but also can be applied to combustion petroleum coke [6] and reduction of alkenes from FCC gasoline [7].
The distribution profiles of uu, ud and um in the four regions (the distributor affect region, the draft tube, the annulus and the gas-solid diffluence region) are obtained according to the experimental data.
The distribution profiles of uu, ud and um in the four regions (the distributor affect region, the draft tube, the annulus and the gas-solid diffluence region) are obtained according to the experimental data.
Online since: January 2026
Authors: Siti Nikmatin, Alimah Hasyyati Sahda, Rais Rahmadi, Allen Kurniawan
A contact angle goniometer (Data Physics OCA15ES, Germany) was employed to contact angle and absorption rate of POME and water with spikelet fibers.
The oil sorption capacity was calculated based on the reduction in OG concentration per gram of spikelet fiber as follows: OSC = [(C0 – Ct) × V ] / Wd (2) where OSC is the oil sorption capacity of spikelet fiber (g/g), V is the POME volume (L), and Wd is the weight of dry spikelet fiber (g).
The oil sorption capacity was calculated based on the reduction in OG concentration per gram of spikelet fiber as follows: OSC = [(C0 – Ct) × V ] / Wd (2) where OSC is the oil sorption capacity of spikelet fiber (g/g), V is the POME volume (L), and Wd is the weight of dry spikelet fiber (g).
Online since: December 2024
Authors: Iuliana Duma, Lia-Nicoleta Botila, Alin Constantin Murariu, Ion Aurel Perianu, Cornelia Baeră, Matei Marin-Corciu
An analysis of existing experimental data drawn from the literature suggests the potential for reaching pressures as high as 1400 MPa.
It's worth noting that this reduction in cutting width is achieved while maintaining the integrity of the rotating bore in the penetrating water jet, which is a crucial factor for ensuring cutting precision.
It's worth noting that this reduction in cutting width is achieved while maintaining the integrity of the rotating bore in the penetrating water jet, which is a crucial factor for ensuring cutting precision.
Online since: September 2013
Authors: Welf Guntram Drossel, Matthias Rehm, Holgerr Schlegel
The conflict consists in the reduction of cycle time by high drive dynamics while maintaining a high or even improved manufacturing accuracy.
Table 2 Determined parameter of the simulation model Parameter Value Stiffness of the coupling element k = 1.750.000 N/m Damping of the coupling element d = 400 Ns/m Fiction of each linear drive f = 45 N/s + 35 N Current time constant Ti = 225 µs Dead time current control loop Tdi = 250 µs Communication dead time data bus Tbus = 225 µs Symmetric filter time constant Tbus = 225 µs Communication dead time position control Tbus = 225 µs For an effective usage of the simulation model, the physical and control-specific parameters as shown in Table 2 were identified by a stepwise starting-up of the cascaded control loops.
Table 2 Determined parameter of the simulation model Parameter Value Stiffness of the coupling element k = 1.750.000 N/m Damping of the coupling element d = 400 Ns/m Fiction of each linear drive f = 45 N/s + 35 N Current time constant Ti = 225 µs Dead time current control loop Tdi = 250 µs Communication dead time data bus Tbus = 225 µs Symmetric filter time constant Tbus = 225 µs Communication dead time position control Tbus = 225 µs For an effective usage of the simulation model, the physical and control-specific parameters as shown in Table 2 were identified by a stepwise starting-up of the cascaded control loops.
Online since: February 2020
Authors: Peter A. Ajibade, Abimbola E. Oluwalana
The order of degradation to the kinetic data are as follows: OA-PbS(150) > OA-PbS(190) >OA-PbS(230) > ODA-PbS(150) > ODA-PbS(190) > ODA-PbS(230) which is in agreement with the degradation efficiency bar chart shown in Fig 6.
The redox process can be written as follows: Oxidation: PbS →Pb2+ +S+2e- Reduction: PbS+ 2e- →Pb+ S2- Fig. 7 Cylcic voltamogram of OA-PbS and ODA-PbS nanoparticles at increasing scan rates Fig. 8 Randles-Sevcik plots of OA-PbS and ODA-PbS nanoparticles Randles-Sevcik equation Ip,a=0.4463nFACnFvDRT12 was used to investigate the electrochemical properties of the PbS nanoparticles [37] based on its reversible process.
The redox process can be written as follows: Oxidation: PbS →Pb2+ +S+2e- Reduction: PbS+ 2e- →Pb+ S2- Fig. 7 Cylcic voltamogram of OA-PbS and ODA-PbS nanoparticles at increasing scan rates Fig. 8 Randles-Sevcik plots of OA-PbS and ODA-PbS nanoparticles Randles-Sevcik equation Ip,a=0.4463nFACnFvDRT12 was used to investigate the electrochemical properties of the PbS nanoparticles [37] based on its reversible process.
Online since: August 2019
Authors: C. Femina Carolin, Ponnusamy Senthil Kumar
The variations in the experimental conditions like moisture content, temperature, data analysis bring out the changes in the proton conductivity of PEM.
The hydrolytic stability is normally assessed by measuring the progressions in mechanical properties, weight reduction, IEC, and proton conductivity.
The hydrolytic stability is normally assessed by measuring the progressions in mechanical properties, weight reduction, IEC, and proton conductivity.
Online since: April 2021
Authors: Andrei Aleksandrovich Vorotnikov, Semyon Viktorovich Bushuev, Elena Alekseevna Melnichenko, Yuri Viktorovich Poduraev, Ilya Aleksandrovich Frolov
The form of the histograms of the absolute comparative indicator distribution does not depend heavily on the working gap, but with its reduction is distributed over a larger interval of possible values.
The obtained data confirm the hypothesis that the “multipole” method of installing magnets in the structure allows increasing the braking torque relative to the “axial” method.
The obtained data confirm the hypothesis that the “multipole” method of installing magnets in the structure allows increasing the braking torque relative to the “axial” method.