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Online since: January 2013
Authors: Shen Bai Zheng, Xiaog Xiong Wang, Shao Hui Pan, Hui Wen
During the data processing, special attention should be paid to the abnormal sliding in upward section of the curve to get the upper yield point value, the lower yield value and the maximum value.
The elongation, the area reduction rate, the yield stress and the tensile strength could be calculated after measuring the length and width of the minimum section of tensile failure samples.
The measured data is listed as below: Table 2 Performance index after experiment Numbers Properties Original sample No.1 of air cooling No.2 of air cooling No.1 of austenite region treated No.2 of austenite region treated No.1 of ferrite region treated No.2 of ferrite region treated Upper yield strength(MPa) 297 289 286 284 282 287 289 Lower Yield strength(MPa) 303 282 278 281 279 280 283 Tensile strength(MPa) 394 377 382 376 375 377 381 Elongation(A%) 23.5 29 31.5 33.5 34.5 32 29.6 Reduction of area(Z%) 51 56 60.5 64 65 59.5 58.5 Conclusions 1.
Online since: August 2012
Authors: An Ming She, Wu Yao, Wan Cheng Yuan
Evolution of Various States of Water in Blended Cementitious Materials SHE An Ming1, a, YAO Wu2, b and YUAN Wan Cheng1, c 1 State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China 2 Key Laboratory of Advanced Civil Engineering Materials (Tongji University), Ministry of Education, Shanghai 200092, China a sheanming@gmail.com, b yaowuk@tongji.edu.cn, cyuan@tongji.edu.cn Key word: cement; fly ash; water; low field NMR Abstract.
After conducting a numerical Laplace transformation by the computational programme, a plot of T2 distribution originating from the data of Fig. 1 (a) is obtained as shown in Fig. 1 (b).
Fig.1 (a) The typical decay of transverse relaxation detected by CPMG pulse sequence, (b) the T2 distribution arising from the data of (a) Table 2 Relationship between pore dimensional and relaxation time Pore types Capillary pore Mesopore Gel pore Pore diameter/nm >50 50~12 <12 T2/ms >1.042 1.042~0.208 <0.25 To detect the content of chemically bound water, the specimens cured for desired time were dry in a oven with setting temperature of 105℃ to constant weight.
That might ascribe to the reduction of absolute amount of cement in the composite pastes.
Online since: December 2013
Authors: Abd Rahim Abu Bakar, Muhammad Ridhwan Abd Rahman, Gregory Vernin
Lee et al [4] proposed modification method of the shoes and the drum for squeal reduction.
A data acquisition system (DEWE-201) is used to capture all related data.
This indicates that with a proper modification made on the lining a promising squeal reduction can be sought.
Online since: May 2011
Authors: Huie Chen, Huan Yan, Jun Zhang
Table 3 Granularmetric composition of treated samples at different curing time [%] Soil Curing time [day] Dispersant agent >2 mm 2- 0.5 mm 0.5- 0.25 mm 0.25- 0.1 mm 0.1- 0.075 mm 0.075- 0.005 mm <0.005 mm Treated 1 N 5.38 4.26 9.95 5.52 74.89 0 Y 6.29 5.13 10.8 4.20 61.71 11.87 8 N 7.68 4.38 8.77 4.97 77.0 0 Y 10.54 3.94 8.47 4.26 63.22 10.57 28 N 1.38 10.87 4.77 8.87 3.80 70.31 0 Y 0.21 6.62 5.08 11.38 10.47 61.53 4.71 Data in Table 3 show that, compared with original sample, there is an obvious decrease in clay particle content in stabilized samples, and it is even zero in consolidated samples without dispersant agent.
Hence there is an increase in clay particles and a reduction in silt content in soils treated by dispersant agent.
Table 4 Physical and mechanical property of treated samples at different curing time Sample Curing time[day] Water content [%] Cohesion [kPa] Internal friction angle [o] Treated 1 42.0 24 13 8 38.0 50 18 28 43.7 176 29 From data shown in Table 4, it can be found that at the early stage of curing period, the water content of samples decreases gradually and somewhat increases at the final curing days.
When the curing time is one day, water in soil is greatly exhausted after the addition of cement, while penetrating quantity is small, leading to a reduction in water content.
Online since: September 2013
Authors: Rosa Cristina Cecche Lintz, Lubienska Cristina L.J. Ribeiro, Ana Elisabete P.G.A. Jacintho, Marta Siviero Guilherme Pires, Luisa Andréia Gachet-Barbosa, Andressa Fernanda Angelin
Rossignolo (2009) [5] found a significant performance improvements in these structures from the reduction of total weight by using lightweight aggregates, such as expanded clay.
Looking at the data obtained it was concluded that both in light and in the conventional concretes, the interactions between paste and aggregates become stronger with increased consumption of cement.
From the test of modulus of elasticity, it could be seen that the lightweight concrete produced in this study showed a reduction, an average of 16% when compared to values achieved by conventional concretes.
These results show that the aggregate is the main limiting factor of the performance of mechanical strength of the concrete, ie, the weakest part of the lightweight concrete is the aggregate and the mortar is stronger, thus confirming the data obtained by Rossignolo (2009) [5].
Online since: March 2014
Authors: Igor Emri, Alen Oseli
Therefore, understanding of the volumetric response is important in numerous engineering processes (e.g. high pressure injection molding) [1] and applications (e.g. noise and vibration reduction applications) [2].
Obtained data is further sent to a personal computer.
Obtained data reflects general functionality of apparatus although apparatus has certain limitation regarding boundary conditions.
Emri, Railroad noise and vibration reduction system, SEMDOK 2012: 17th international of PhD students’ seminar, 2012 [3] T.
Online since: November 2012
Authors: Hussain Hamoud Al-Kayiem, Tawfeeq W. Salih, Dhinakaran Govindasamy
Reduction of the flow from supersonic to such speed is combined with pressure reduction.
The results from the numerical analysis are then validated by comparing with the experimental data.
Online since: February 2017
Authors: Maria Vlad, Vasile Bașliu, Gelu Movileanu
The concept of composite with technological role based on creating new complex metal matrix with solid particles in granular form has multiple purposes, among which we mention reduction of pollution in steels department and reduction of economic losses through recovery and reusing of granular ferroalloy particles.
Results and discussion The experimental program for obtaining the composite material A6061/SiC comprises data and conditions shown in Table 2.
Online since: May 2014
Authors: Saniye Karaman Oztas, Leyla Tanacan
Weighting although is not the mandatory element of LCIA is the element in which local data becomes important.
Thus, it can be possible to assess environmental impacts of building materials by using local data.
Fig.1 The distribution of the panelists The Development of the Survey and the Data Collection Process A survey for the weighting of the impact categories is prepared in accordance with the Analytic Hierarchy Process (AHP) proposed by Saaty [5].
It is observed that the data supported the results.
Conclusions This paper emphasize that the most accurate findings for the environmental impact assessment are usually obtained where the product, process, technology, and location-specific data for a building material is used.
Online since: June 2014
Authors: Li Rong, Liu Qiu Lin, Zuo-Ren Nie, B.L. Li, Xiao Lan Wu, S.P. Wen, H. Huang
The interaction energy between atoms is deduced from the published thermodynamic or kinetic data [16-18], and the details are as follows: The interaction potential between the same atoms is calculated as follows[19]: (3) in which Ecoh is the cohesive energy.
After MCS of 1´104, the average size of the Zn/Mg clusters in the alloys with Er is smaller than that in the alloys without Er, and the reduction percent is about nineteen percent.
Farther more, the reduction amount of average size and the increment amount of number density of Zn clusters and Zn/Mg clusters increase with enhancement of Er content in the alloys.
Numerical Data and Functional Relationship in Science and Technology (Vol. 25) : Atomic Defects in Metals[M].
Numerical Data and Functional Relationship in Science and Technology (Vol. 5): Phase Equilibra, Crystallographic and Thermodynamic Data of Binary.
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