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Online since: January 2013
Authors: Jian Yin, Wei Min Song, Qing Huang
For the design of high performance concrete, admixtures are necessary to improve properties of concrete[4,5], hydration heat is one vital data which should be taken into consideration.
The reduction percentages of the hydration in the cementitious material caused by using UFA were summarized in Table 3.
Fig.2 Heat evolution rate of cementitious Fig.3 Heat evolution of cementitious materials with or materials with or without UFA without UFA Table 3 Reduction percentages of hydration heat of cementitious materials with various content of UFA Reduction percentage Time /h % initial setting final setting 10 20 30 40 50 60 72 G1 0 0 0 0 0 0 0 0 0 G5 37.5 37.2 24.7 16.8 14.6 14.6 14.1 13.1 12.1 G6 49.4 49.4 36.7 26.5 22.8 23.3 23.4 22.3 20.9 G7 62.1 63.2 50.3 36 31.5 31.5 31.2 29.8 28.2 Fig.4 Heat evolution rate of cementitious materials Fig.5 Heat evolution of cementitious materials with or without TJ-Ⅲ modified with or without TJ-Ⅲ modified Table 4 Reduction percentage of hydration heat with TJ-Ⅲ modified Reduction Percentage /% Time /h 5 10 20 30 40 50 60 72 G2 0 0 0 0 0 0 0 0 G3 68.3 74.1 31.2 11.5 5.7 3.6 2.3 2.17 Evaluation of the effect of superplasticizer.
In terms of the results presented in Table 4, the reduction percentage of the hydration heat was 74.1% after 10h setting time, but was only 2.17% after 3 days, which indicates that the effect of TJ-Ⅲ on reducing the hydration heat was primarily on the early stage of hydration.
As shown in Table 5, compared to the control group G1, the reduction percentage after 10h setting time was 31.4% for G3, and was 17.3% for G4.
Online since: December 2018
Authors: Miloš Janeček, Josef Stráský, Petr Harcuba, Kristýna Halmešová, Dalibor Preisler
The inverse pole figures were extracted from measured EBSD maps by expanding the discrete data into a series of generalized spherical harmonic functions.
Fig. 1: EBSD orientation map of cold-swaged rod with 65% of area reduction.
The texture index (intensity of the strongest orientation that signifies, how this orientation is stronger than a random orientation) reaches values of approx. 4 at 40% of area reduction, nearly 9 at 65% of area reduction and over 13.5 in case of 80% of area reduction.
a) b) c) Fig. 2: Inverse pole figures of samples with a) 40%, b) 65% and c) 80% of area reduction.
After 80% of area reduction, there is almost only this 110 orientation as shown in Fig. 2.c).
Online since: August 2013
Authors: Jing Yu Guo, Ran Yang, Zhi Gang Hu, Wei Dong Song, Gao Feng Liang, Xiao Li Yang, Xiao Wei Son
Pre-processing of The Data.
Correction of Synthetic Data.
Figure 1: Synthetic data correction.
Correction of Experimental Data.
The method can be applied at an early stage of automated data analysis, without prior knowledge of the data.
Online since: October 2014
Authors: Mher Mkrtumyan, Gayane Madatyan, Ruzanna Harutyunyan, Gor Grigoryan
It is worth to mention the capital investment of approximately 187.26 billion AMD, 77.16 billion of which was invested in the sphere of drinking water and 110.1 billion AMD was aimed at irrigation objectives (120 million USD granted for the Millennium Challenge Corporation (MCC)-Armenia project implementation included) in the sphere of drinking and irrigation water supply via mortgage and grant projects according to 2002-2012 data of State Committee on Water Economy adjacent to the Republic of Armenia Ministry of Territorial Administration (Table 1).
Methods and Results The most important achievements of the water sphere due to investments are the 1. modernization of drinking and irrigation systems; 2. restoration of Marmarik reservoir; 3. continuity of private management of closed joint-stock companies such as the “Armenian Water Sewerage Company”, “Lori-Water Sewerage Company”, “Shirak-Water Sewerage Company” and “Nor Akunq” CJSC. 4. energy saving by almost 50% compared to 2002 data; 5. construction realization of sewerage cleaning stations in Gavar, Martuni and Vardenis towns and well as construction of sewerage network of around 50km; 6.
This will promote the reduction of water loss increasing water supply efficiency as well as improve the management of transported water by eliminating the filtration phenomena causing damages in the residential areas.
The latter will contribute to the cultivation of high value crop, reduction of agricultural production costs and improvement of water consumers’ payability.
Irrigation sphere projects aimed at cost reduction for the irrigation water due to electricity waste reduction are planned to be implemented together of the World Bank.
Online since: February 2011
Authors: Gouda M. Ghanem, Mohamed M. Ebd-Elrazek, Sayed M. Abd El-Bakey, Ahmend Ali Hassan, Esraa Emam Ali
In order to verify the analytical model used in this research using test results of the experimental data of the experimental branch, the finite element analysis were performed then to be able to proposed a guide charts which can be used to predict the moment capacity of joint in beam-column connection in RC frames subjected to fire taking into consideration the different fire durations, fire temperature, and concrete strength.
It can be seen that from the this charts that the ratio between the Mf to Mo ranged from 0 to 1 and this explained that as the temperature increase the ratio decreased and this attributed to the reduction in the stiffness of section capacity which is subjected to fire, also it can be demonstrated that as the temperature increase with the increase in the concrete compressive strength the ratio between Mf to Mo increased and also it can be seen that from this chart that as the duration which the joint subjected to fire increase the ratio between Mf to Mo decreased.
Finally it can be seen that these charts Considered a guide charts which can enable the designer to estimate the reduction in the moment capacity of the critical sections in two hinged and one bay RC frames after subjecting Conclusions This paper can conclude the following:
- Quenching the specimens by water caused a reduction in failure load at 600°C by 21% compared to control specimen
- Cooling the specimen by air caused a reduction in failure load by 6.7% compared to control specimen, which indicate that cooling by air is less effective than cooling by water.
Online since: October 2011
Authors: Mei Chen Fu, Jian Jun Zhang, Di Xu, Jin Tao
Data Sources and Processing Study Area.
Data Sources.
This research needs major data and source are National economic statistical yearbook in Fengnan district during 1998 to 2009, land use statistical yearbook in Fengnan district during 1998 to 2009 and land use types survey database of Fengnan district in 2009 and other relevant data.
Data Processing.
The ecosystem service value of per unit area and the change between 1998 and 2009 can be calculated by the land use data (Fig. 2).
Online since: December 2023
Authors: Hanaa Gamal Mohammed, Lailah M. Abd el-Hafez, Alaa Y. Abouelezz, Naglaa G. Fahmy
The validation process involves comparing the numerical results with test data from relevant literature.
Previous Test Data Was Used for Model Validation The punching shear resistance of flat slabs with openings in this research is based on experimental data conducted by A.
There is a reduction in ultimate load by about 14% compared with the control specimen.
There is a reduction in ultimate load by about 15% compared with the control specimen.
Results Discussion The model used for validation in this research is based on experimental data from previous research.
Online since: April 2005
Authors: Drago Skrtic, S.Y. Lee, D.W. Liu, Joseph M. Antonucci
Statistical analysis of the experimental data.
Experimental data were analyzed by ANOVA (α = 0.05).
Analysis of the 24 h DC data (group mean values) revealed an average (80.2 ± 2.1) % of Resin/monomer EBPADMA TEGDMA HEMA MEP ETHMI 43.17 43.24 10.08 2.51 ETHMII 54.45 31.94 10.00 2.61 ETHMIII 62.85 23.22 10.36 2.57 vinyl conversion in copolymer series.
A maximum reduction in DC of 10.3 % established for unmilled ACP composites compares well with the reduction of DC observed in Bis-GMA- and EBPADMA-based binary and ternary resin composites utilizing the same type of ACP filler (up to 14.4 % and 14.2 %, respectively; [1]).
Utilizing milled ACP diminishes the reduction in the DC of ETHM composites (up to 4.6 %) compared to their copolymers.
Online since: September 2013
Authors: Jun Sheng Wang, Jin Lan Bai, Xiang Li
The basic idea of exponential smoothing method is to calculate adaptive learning coefficient of the model by the minimum deviation between actual data and calculated data.
In this way the difference between actual data and calculated data will decrease significantly, and the presetting precision will improve accordingly.
Where actual data calculation step is the most important.
There are three kinds of actual data, including measurement actual data, backward calculation actual data, and model calculation actual data.
Therefore, they are called backward calculation actual data.
Online since: June 2020
Authors: Yuri Dorofeev, Rovshan Alekberov, Dzhamilay Murzaeva, Evgeniya Ryabko
According to literary data, the treatment of such fractures is not effective enough, which leads to a prolongation of rehabilitation periods and disability, especially among patients of older age groups.
Data analysis was carried out only on officially published sources.
Available data on three- and four-fragment fractures indicate the possibility of a violation of vascularization of the humeral head, dislocation and cartilage damage with subsequent necrosis of the head and collapse, which is observed in 30-100% of cases.
Also, there is not enough reliable data on the treatment of ipsilateral fractures of the humerus, at the level of the proximal and diaphysis.
Open reduction and internal fixation of proximal humeral fractures with use of the locking proximal humerus plate.
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