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Online since: December 2014
Authors: Jia Yin He, Gu Hua Li, Hao Lu, Jia Wei Yang, Liang Zhang, Ze Jiang Sun
(2)Coarse aggregate: coarse aggregate used in the test is gravel. 5 ~ 16mm and 16 ~ 25mm two kinds of grain size gravel mixed, blending ratio was 40%, 60%.
Table 4-1 The result of different amount of polypropylene fibers Group number The amount of polypropylene fibers/kg Slump(mm) Extension degree(mm) Description of workability K1 0 215 470 Overall slump,poor cohesion K2 0.6 200 390 Landslides,poor cohesion K3 0.8 215 430 Overall slump, good overall performance K4 1.0 210 420 Overall slump, good overall performance K5 1.2 225 460 Overall slump, good overall performance As shown in Table 4-1,from K1 to K5 ,if only ensure the volume of powder paste, concrete’s cohesion is poor. the water retention and mobility barely meet the requirements, And the overall performance of workability is poor.After adding different amounts of polypropylene fiber, concrete’s mobility reduced, cohesion and water retention improved.Therefore, the mobility can be ensure by appropriately improving the amount of Superplasticizer in the experiment .From K1 to K5,the amount of Superplasticizer
When the incorporation of polypropylene fibers above 0.8% ,the workability of Manufactured sand concrete can be ensured with corresponding Superplasticizer. 4.2 The impact of polypropylene fiber to low-intensity Manufactured sand concrete on Compressive strength Table 4-3 Effect of Superplasticizer on compressive strength Group number 28-day strength 56-day strength K1 25.00 33.39 K2 24.60 27.58 K3 22.81 31.55 K4 24.03 28.30 K5 23.63 31.12 Fig 4-6 Compressive strength (MPa) As shown in Fig 4-6 and Table 4-3,from K1 to K5,the compressive strength reduced of mechanisms sand concrete which adds different amounts of Polypropylene fibers,but the change is very litter.Consequently, The impact of polypropylene fiber to low-intensity Manufactured sand concrete on Compressive strength is not obvious.
Online since: December 2014
Authors: Long Sheng Bao, Ling Yu, Dong Ye Zhu
According to the test results, it can be easily reached that asphalt mixture with graduation of coarse grain and structure of dense skeleton type has better high-temperature stability.
Acknowledgements This work was financially supported by the general project of liaoning province department of education,the number of funded project is L2013238, and the Colleges and universities outstanding talents of science and technology support plan, Preferred by Liaoning "Talents Project" for the project the number is 2012921047.
Online since: January 2012
Authors: Zhu Bai Liu, Qing Shan Li, Jun Liu, Guang Zhong Xing, Wei Hong, Jing Sun, Wei An Yu
When a stable set is displayed in the brain, we first focus on some of their features local information; this feature will activate the local information of the whole number of different information models.
As the association depends on the stability of the correspondence, when a message is activated, it will certainly be active in a number of information models, has been selected to form a stable correspondence between the information model, the information mode is selected by adding to the original thinking time phase, but the significance of reproduction has been stabilized and will not appear on new meaning.
Organization is composed of metal material types and element content, grain composition and particle size, the relative content and distribution relationship between the decisions of the state.
Online since: December 2012
Authors: Charoen Nakason, Claudia Kummerlöwe, Norbert Vennemann, Ekwipoo Kalkornsurapranee
According to our previous work [2, 3], ENR could be used to prepare dynamically cured ENR/PA-12 and ENR/TPU blends with enhancement various properties and fine grain of spherical dispersed vulcanized rubber domains.
This is due to 6PPD is a secondary antioxidant (i.e., amine antioxidant) which is capable of converting the active radicals to be inert products in many steps and a number of radicals.
Moreover, higher number of reactive hydrogen atoms in 6PPD cause higher efficiency to suppress the oxidation process.
Online since: July 2019
Authors: Min Hu
The inclined Y groove welding crack test method was used in the experiment, and various welding process tests were grouped, numbered and explained.
The fiber surface in the fracture center is composed of small dimples and a small number of large dimples, which undergo large plastic deformation during crack propagation.
It can also be seen from the microstructure of the fracture that the grains of the joint are uniformly deformed during the tensile process.
Online since: September 2014
Authors: Tatiana V. Vakalova, Larisa P. Govorova, Antonina A. Reshetova, Anna Y. Tokareva, Ekaterina V. Shvagrukova
The most number of scientists associate an activating effect of mineralizers on the ceramic material sintering with the structure of the silicate melt [2, 3].
Specificity of grain and chemical-mineralogical composition determines the technological properties of investigated kaolin: moderate plasticity, low sensitivity to drying, sufficiently high coherency.
In the complex it determines the technological properties of bauxite, such as low-plasticity (plasticity number 4.6 – 5.2), low sensitivity to drying (coefficient of sensitivity to drying 0.3 – 0.4), non-sintering to the temperature of 1400 °C.
Online since: June 2019
Authors: Igor Eduardovich Pamirsky, Alexey Grigorievich Klykov, Kirill Sergeevich Golokhvast, Alexander Mikhailovich Zakharenko
This paper reports the first results of a comparative study of the phytolitic profile in various types of cultivated grain plants using the example of wheat Triticum aestivum L.
At a 50-fold increase, laser excitation was used at a wavelength of 785 nm, the laser exposure was 1 second, the number of accumulations was 50.
The greatest number and variety of needle phytoliths were found in the ears.
Online since: May 2013
Authors: Jozef Martinka, Karol Balog, Ivan Hrušovský, Tomáš Chrebet
Through traditional plant-breeding procedures, a joint venture between CSIRO (Commonwealth Scientific and Industrial Research Organization, Australia) and United Grain Growers Ltd of Winnipeg, Canada has led to the development of edible linseed oil.
The IV is expressed in the number of centigrams of iodine absorbed per gram of sample.
The Iodine number of the oil was unknown, but for linseed oil it is generally stated from 113 to 145.
Online since: August 2014
Authors: Qiu Xiang Gu, Wei Wu Xu
Early-middle ordovician formation in study area deposit carbonate platform faces, include micrite, cloud microcrystalline limestone, grain limestone, low Shale content.
Table 1 The statistics of early Hercynian karst cycle frame in individual well number type wells amount probability (%) 1 I+II 2 6.25 2 I+III 1 3.125 3 II+III 3 9.375 4 I 3 9.375 5 II 8 25 6 III 15 46.875 But single layer or a single karst cave cycle combination on well profile is the highest probability by 81.25% in table1.The second probability is two karst cave layer or two cycle combination appears on the same well section, with probability of 18.75%.For single cycle, the karst cycle III is 25%, the karst cycle III is the largest probability of 59.375%.
The cave number decreased when the distance between unconformable surface and cave turn large.
Online since: January 2022
Authors: Hideaki Tsukamoto, Kaito Fukui
The vacuum condition can prevent or limit the oxidation issues and the fast heating rate along spark and plasma condition helps to control the reactions between magnesium and other phases including suppressing coarse growth of formation phases and crystal grains [1,4].
Here, ρs is the density of the particles, ρ is the density of the fluid, d is the particle diameter, and μ is the viscosity of the fluid, D/2 is the radius of rotation, N is the number of rotations.
From Eqs. (1) and (2), the velocity of particles is proportional to the difference in density between slurry and particles, the square of the diameter of the particles, and the square of the number of revolutions, and is inversely proportional to the viscosity of the fluid.
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