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Studies of Mechanical Properties and Absorption of Lightweight Concrete with Brazilian Expanded Clay
Online since: August 2013
Authors: Andressa Fernanda Angelin, Rosa Cristina Cecche Lintz, Luísa Andréia Gachet-Barbosa
The bridges and roofs typically require large spans of reinforced concrete, 70% of the structural weight of the requests, as aid, lightweight concrete, allows the reduction of the structural dimensions and increasing spans of the pillars, with a reduction of the total cost of the work in up to 7%.
These results show that the household is the main limiting factor of the performance of mechanical strength of the concrete, ie, the most fragile part of the lightweight concrete is the aggregate and the mortar is stronger, thus confirming the data obtained by Rossignolo (2009) [4].
These results show that the household is the main limiting factor of the performance of mechanical strength of the concrete, ie, the most fragile part of the lightweight concrete is the aggregate and the mortar is stronger, thus confirming the data obtained by Rossignolo (2009) [4].
Online since: June 2014
Authors: Xiao Lu Wang
Louis car driving characteristics data, most cars are off work when charging begins, little night charge.
Charging load shifting variable cost reduction is limited, because the gas within the system is running most of the time, the greater the cost reduction is to reduce the cost of coal variable.
Charging load shifting variable cost reduction is limited, because the gas within the system is running most of the time, the greater the cost reduction is to reduce the cost of coal variable.
Online since: January 2013
Authors: Jian Jun Liu, Kuan Jun Zhu
The clipped-optimal algorithm produced better reductions in upper floors’ peak displacements and inter-story drifts than the passive-on controller, while using smaller forces.
Peak floor acceleration reductions obtained ranged from 35% to 60%.
This inverse neural network was trained using data obtained using the phenomenological model developed by Spencer et al. (1997.)
Peak floor acceleration reductions obtained ranged from 35% to 60%.
This inverse neural network was trained using data obtained using the phenomenological model developed by Spencer et al. (1997.)
Online since: October 2015
Authors: Oksana N. Zarubina, Liubov V. Maliy, Gennady M. Mokrousov
Firstly, all the possible of oxidation and reduction states of a substance were considered and the solubility of its oxidation forms in dependence on pH was found.
The concentration of each kind of charge species is 10-1 M Thus, the steady-state area for manganese telluride is inside the lines of selective oxidation (2, 8 and 9) and selective reduction (10–12) in the diagram.
The calculations are in agreement with the experimental data.
The concentration of each kind of charge species is 10-1 M Thus, the steady-state area for manganese telluride is inside the lines of selective oxidation (2, 8 and 9) and selective reduction (10–12) in the diagram.
The calculations are in agreement with the experimental data.
Online since: October 2015
Authors: Zheng Wang, Shuang Lu, Li Na Zhou
To improve the properties of concrete, polycarboxylate superplasticizer with 20% water reduction and an entraining admixture named SJ-2 were mixed into all specimens with dosage 0.8% and 0.2‰, respectively.
The test data are given in Table 2.
Electrical resistivity of specimens with different freeze-thaw cycles Specimens Freeze-thaw cycles Total reduction ratio/% 0 25 50 100 Un-leached 1063.5 890 694 656 38.3 leached 612 496 344 275 55.1 Summary Two test schemes were designed to quantitatively analyze damage extent of the freeze-thaw cycling coupled with leaching on the hydraulic concrete through monitoring two indices, including calcium oxide dissolution mass as well as electrical resistivity of specimen matrix during the test process.
The test data are given in Table 2.
Electrical resistivity of specimens with different freeze-thaw cycles Specimens Freeze-thaw cycles Total reduction ratio/% 0 25 50 100 Un-leached 1063.5 890 694 656 38.3 leached 612 496 344 275 55.1 Summary Two test schemes were designed to quantitatively analyze damage extent of the freeze-thaw cycling coupled with leaching on the hydraulic concrete through monitoring two indices, including calcium oxide dissolution mass as well as electrical resistivity of specimen matrix during the test process.
Online since: September 2018
Authors: Igor L. Bartolomei, Elena N. Karpushko, Marina O. Karpushko
Increasing durability of bridges requires regular ongoing, periodic and special inspections, which will contribute to a significant reduction in the number of bridges requiring restructuring, reconstruction and repair.
Data on the year of construction: 1976.
The evaluation of the technical condition was carried out in accordance with the requirements [2, 3, 12, 16], taking into account the actual state of the building structures, parameters of the defects and damages detected, their effect on the reduction of bearing capacity and reliability.
Data on the year of construction: 1976.
The evaluation of the technical condition was carried out in accordance with the requirements [2, 3, 12, 16], taking into account the actual state of the building structures, parameters of the defects and damages detected, their effect on the reduction of bearing capacity and reliability.
Online since: June 2014
Authors: Marcelo J.S. de Lemos
Ref. [13] obtained a heuristic correlation for a closely packed bed of particle diameter and compared their results with experimental data.
A reduction in K means an increase in flow resistance.
[6] Nussbaumer T., Combustion and Co-combustion of Biomass: Fundamentals, Tecnologies, and Primary Measures for Emission Reduction, Energy & Fuels, Vol. 17, pp. 1510-1521, 2003
A reduction in K means an increase in flow resistance.
[6] Nussbaumer T., Combustion and Co-combustion of Biomass: Fundamentals, Tecnologies, and Primary Measures for Emission Reduction, Energy & Fuels, Vol. 17, pp. 1510-1521, 2003
Online since: February 2014
Authors: Jun Tang, Rong Fang Chen, Xue Feng Deng
In addition, "energy-saving emission reduction" 1025 "planning" clear "1025" period will reduce no-load loss of power transformer 10%-13%, the load loss 17%-19% therefore, energy saving transformer arduous task.
Main technical parameters of the transformer Technical parameters of the transformer can represent its loss performance of the transformer in the process of power supply - active power losses and reactive power consumption, so the technical parameters of the transformer is the data basis to calculate economic operation of the transformer.
The purpose of determining the optimum operation segment is to reduce the comprehensive loss ratio of the transformer to the minimum within the scope of the load, so as to realize the purpose of efficient loss reduction.
Main technical parameters of the transformer Technical parameters of the transformer can represent its loss performance of the transformer in the process of power supply - active power losses and reactive power consumption, so the technical parameters of the transformer is the data basis to calculate economic operation of the transformer.
The purpose of determining the optimum operation segment is to reduce the comprehensive loss ratio of the transformer to the minimum within the scope of the load, so as to realize the purpose of efficient loss reduction.
Online since: March 2012
Authors: Michał Krysztof, Witold Słówko
The preferable way to counteract this tendency is reduction of the distance la between the sample and the lower throttling aperture (LTA) which is passed by the electron beam at the high gas pressure.
In turn, the distance reduction causes serious decrease in SE signal produced by typical GSED (Gaseous SE Detector) where the signal amplification obtainable in the Townsend discharge depends on the product of the gas pressure p and the mentioned distance la.
Results of MC-SIMION calculations for electron flow in the detector model at various water pressures (p) in the sample chamber (1 – sample stage, 2 – focusing aperture, 3 – lower throttling aperture, 4 – final anode, 5 – screening tube ST, 6 – extracting grid, 7 – mirror, 8 – plexiglass tube, PM – photomultiplier, ULTA = 300 V, UST = 0 V): ( a) electron trajectories for p = 0.5 hPa (blue – SE, green and black – ESE), (b) electron trajectories for p = 5 hPa (data as in a), (c) input amplification factor Kw for two anode voltages UA vs. water vapour pressure p, (d) final amplification factor KAC for two anode voltages UA vs. water vapour pressure p.
In turn, the distance reduction causes serious decrease in SE signal produced by typical GSED (Gaseous SE Detector) where the signal amplification obtainable in the Townsend discharge depends on the product of the gas pressure p and the mentioned distance la.
Results of MC-SIMION calculations for electron flow in the detector model at various water pressures (p) in the sample chamber (1 – sample stage, 2 – focusing aperture, 3 – lower throttling aperture, 4 – final anode, 5 – screening tube ST, 6 – extracting grid, 7 – mirror, 8 – plexiglass tube, PM – photomultiplier, ULTA = 300 V, UST = 0 V): ( a) electron trajectories for p = 0.5 hPa (blue – SE, green and black – ESE), (b) electron trajectories for p = 5 hPa (data as in a), (c) input amplification factor Kw for two anode voltages UA vs. water vapour pressure p, (d) final amplification factor KAC for two anode voltages UA vs. water vapour pressure p.
Online since: November 2012
Authors: Tarsem Sihra, Diane J Mynors, Chang J Wang
Cemented total hip arthroplasty will remain the "gold standard" until prospective long-term data (>15 years) of cementless systems become available.
The reduction of stresses at the rim of the cement mantle are quite small, therefore further investigation is required.
The longer the cement anchor pegs, up to about 9 mm, the less stress at the rim of the cement mantle, there is little stress reduction beyond 9 mm length.
The reduction of stresses at the rim of the cement mantle are quite small, therefore further investigation is required.
The longer the cement anchor pegs, up to about 9 mm, the less stress at the rim of the cement mantle, there is little stress reduction beyond 9 mm length.