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Online since: December 2013
Authors: Shui Sheng Yang, Jin Cai Su, Xiao Qian Yang, Wei Zhang
Table 1 Arterial highway mileage summary table(including cement concrete pavement project)
serial number
Project
Highway classification
overall length
(km)
The length of cement pavement
(km)
Built year
1
Baoheng Road
second-class
88.985
0.575
1995
2
Hengde Road
second-class
60.295
1.411
1997
3
Shihuang Highway Wuqiang Connecting Line
second-class
63.7
3.735
1998
4
Zhenggang Line
second-class
80.004
12.115
2002
5
Hengde Highway Jingzhou Connecting Line
first-class
21.805
18.805
2009
Total
314.789
36.641
1.2.
The original design was to use asphalt concrete pavement, the structure is: 4cm fine grained type asphalt concrete+6cm medium sized asphalt concrete+32cm lime-fly-ash bound macadam+16cm cement stabilized gravel.
Set up a temporary bench mark on the road’s both sides every 100 meters. 2.2.2.Mix and transportation of concrete Material Selection: Taihang Cement PS42.5 number, Zhengding medium sand, Jinan gravel, machine wells, Huaneng Dezhou fly ash from coal-fired power plant, FAC - 6 retarded high efficient water reducing agent.
The original design was to use asphalt concrete pavement, the structure is: 4cm fine grained type asphalt concrete+6cm medium sized asphalt concrete+32cm lime-fly-ash bound macadam+16cm cement stabilized gravel.
Set up a temporary bench mark on the road’s both sides every 100 meters. 2.2.2.Mix and transportation of concrete Material Selection: Taihang Cement PS42.5 number, Zhengding medium sand, Jinan gravel, machine wells, Huaneng Dezhou fly ash from coal-fired power plant, FAC - 6 retarded high efficient water reducing agent.
Online since: February 2013
Authors: Ming Zhang, Xue Sheng Liu, Hong Bin Zhang, Jian Guo Ning
(1) Mesoscopic structure characteristics
Rocks containing clay minerals, illite / smectite minerals in the rock surface of the particles flaky directional distribution; better kaolinite polymorphs was worm-like, the book - like film cemented chlorite is developed, and moresurrounding detrital grains surrounding the formation of the pore-lining side
(1) Mesoscopic structure characteristics Rock contains a large number of mainly pure montmorillanite, Iraq/shuffle layer minerals in rock particle surface is flake, directional distribution, local have dissolution cavity development, kaolinite and illite filling in rock particles in microcracks. (2) Mineral composition analysis Clayey sand contains a large number of water swellable mainly pure montmorillanite, secondary mineral have illite and kaolinite and chlorite and mineral, mainly pure montmorillanite content 57.1% among them, Iraq/shuffle layer mineral of the whole mainly pure montmorillanite content of 40%, kaolinite and illite content is low.
(1) Mesoscopic structure characteristics Rock contains a large number of mainly pure montmorillanite, Iraq/shuffle layer minerals in rock particle surface is flake, directional distribution, local have dissolution cavity development, kaolinite and illite filling in rock particles in microcracks. (2) Mineral composition analysis Clayey sand contains a large number of water swellable mainly pure montmorillanite, secondary mineral have illite and kaolinite and chlorite and mineral, mainly pure montmorillanite content 57.1% among them, Iraq/shuffle layer mineral of the whole mainly pure montmorillanite content of 40%, kaolinite and illite content is low.
Online since: April 2020
Authors: De Hong Wang, Hai Long Zhao, Jun Feng Bai, Lu Liang Wang
The cement was made of P.O 42.5 Portland cement; the silica ash had a particle size of less than 2 μm and the density was 2.214 kg/m3; The quartz sand had a coarse particle size of 0.63~1.25 mm, 0.32~0.63 mm and 0.16~0.32 mm respectively; Fine three-grained quartz sand; Basalt fiber (BF) was short-cut continuous fiber with lengths of 12 mm and 6 mm respectively.
Table 1 Basalt fiber performance indicators Fiber type Density/g·cm-3 Elastic modulus/GPa Tensile strength/MPa Diameter /μm Elongation at failure /% Basalt Fiber(BF) 2.4 80~110 3 000~4 000 13 2.4-3.1 Table 2 RPC mix proportion (kg/m3) Number W/B Fiber length Cement Silica fume Coarse sand Medium sand Fine sand Fiber quality (volume fraction) Water reducer Water ZY1 0.22 12 756.52 226.96 737.76 371.00 169.46 1.2(0.05%) 68.09 169.02 ZY2 0.22 12 756.16 226.85 737.41 370.82 169.38 2.4(0.10%) 68.05 168.93 ZY3 0.22 12 755.80 226.74 737.06 370.64 169.30 3.6(0.15%) 68.02 168.84 ZY4 0.22 6 756.16 226.85 737.41 370.82 169.38 2.4(0.10%) 68.05 168.93 2.2 Test scheme.
Table 3 Basalt fiber RPC compressive strength Number Fiber length(mm) Fiber volume fraction(%) Cube compressive strength fcu(MPa) Axial compressive strength fc(MPa) fc / fcu ZY1 12 0.05 79.9 62.2 0.78 ZY2 12 0.10 83.7 74.5 0.89 ZY3 12 0.15 67.2 60.2 0.89 ZY4 6 0.10 74.1 57.8 0.78 4.
Table 1 Basalt fiber performance indicators Fiber type Density/g·cm-3 Elastic modulus/GPa Tensile strength/MPa Diameter /μm Elongation at failure /% Basalt Fiber(BF) 2.4 80~110 3 000~4 000 13 2.4-3.1 Table 2 RPC mix proportion (kg/m3) Number W/B Fiber length Cement Silica fume Coarse sand Medium sand Fine sand Fiber quality (volume fraction) Water reducer Water ZY1 0.22 12 756.52 226.96 737.76 371.00 169.46 1.2(0.05%) 68.09 169.02 ZY2 0.22 12 756.16 226.85 737.41 370.82 169.38 2.4(0.10%) 68.05 168.93 ZY3 0.22 12 755.80 226.74 737.06 370.64 169.30 3.6(0.15%) 68.02 168.84 ZY4 0.22 6 756.16 226.85 737.41 370.82 169.38 2.4(0.10%) 68.05 168.93 2.2 Test scheme.
Table 3 Basalt fiber RPC compressive strength Number Fiber length(mm) Fiber volume fraction(%) Cube compressive strength fcu(MPa) Axial compressive strength fc(MPa) fc / fcu ZY1 12 0.05 79.9 62.2 0.78 ZY2 12 0.10 83.7 74.5 0.89 ZY3 12 0.15 67.2 60.2 0.89 ZY4 6 0.10 74.1 57.8 0.78 4.
Online since: February 2013
Authors: Yi Ping Lu, Jun Jia Zhang, Yong Dong, Ting Ju Li
In the metal melt system, According to the phase rule: f=K+F-1 (f: degree of freedom, K: number of components, andF: number of phase).
Li, Grain refining potency of Al-B master alloy on pure aluminum, Scr Mater. 64 (2011) 1121-1124
Li, Grain refining potency of Al-B master alloy on pure aluminum, Scr Mater. 64 (2011) 1121-1124
Online since: October 2022
Authors: Olga Kizinievič, Viktor Kizinievič, Yahor Trambitski
Possessing high environmental and hygroscopic properties, clay material also has a number of disadvantages: low compressive strength and environmental resistance, high shrinkage value during drying.
Studies [16, 17] demonstrated a huge number of the unique properties of starch, which appear during its chemical or thermal treatment.
It is well known that starch grains are insoluble in cold water and only after reaching 60 °C beginning the initial process of starch gelatinization.
Studies [16, 17] demonstrated a huge number of the unique properties of starch, which appear during its chemical or thermal treatment.
It is well known that starch grains are insoluble in cold water and only after reaching 60 °C beginning the initial process of starch gelatinization.
Online since: July 2016
Authors: Paul J. Cosentino, Farid Messaoud
PPMT probe can be connected to standard cone penetration test (CPT) rods enabling a large number of PPMT tests to be conducted within a site [1].
The next two layers have an average VISP of 26 seconds for silty sand with standard deviation of 7.4 seconds and 33 seconds for fine grained silt with a standard deviation of 8.3 seconds.
The APMT software indicated that the VISP for the limited number of soils evaluated varies from 10 seconds to 80 seconds.
The next two layers have an average VISP of 26 seconds for silty sand with standard deviation of 7.4 seconds and 33 seconds for fine grained silt with a standard deviation of 8.3 seconds.
The APMT software indicated that the VISP for the limited number of soils evaluated varies from 10 seconds to 80 seconds.
Online since: October 2023
Authors: Helder Morais, Amir Baraati, Fernando Carlos, Erika Davim, Ricardo Torcato
These tools have an alloy steel body, with a diamond coating in the cutting area with a grain size of D126.
Tools used in the case study, the number indicates the tool diameter (mm), photos with different scales for better viewing Strategies and CAM Programming To make the sculpture, Powermill 2021 CAM software was used, from which the following strategies were used: • Model area clearance, • Model rest area clearance, • Steep and shallow finishing, • Corner multi-pencil finishing.
High speed machining provides a consistent tool loading at the expense of an increased number of rapid, air moves across the component.
Tools used in the case study, the number indicates the tool diameter (mm), photos with different scales for better viewing Strategies and CAM Programming To make the sculpture, Powermill 2021 CAM software was used, from which the following strategies were used: • Model area clearance, • Model rest area clearance, • Steep and shallow finishing, • Corner multi-pencil finishing.
High speed machining provides a consistent tool loading at the expense of an increased number of rapid, air moves across the component.
Online since: June 2013
Authors: Claudio Giardini, Luca Giorleo, Elisabetta Ceretti
The main advantage of workpieces produced by ring rolling, compared to other technological processes, is given by the size and orientation of grains, especially on the worked surface which give to the final product excellent mechanical properties.
Moreover, due to the nature of the process, it is possible to reduce the number of elements, and so the computational time, by considering a symmetric model.
Moreover, due to the nature of the process, it is possible to reduce the number of elements, and so the computational time, by considering a symmetric model.
Online since: November 2011
Authors: Deng Yun Tu, Kai Meng Xu, Peng Xiang Peng, Qiong Guo, Hong Yun
J.Ilic, Chizhen Si, J.L.Yang, and F.John used pre-freezing, they either imposed tensile stress on radial section and compressive stress on the grain direction to resist cell wall deformations or exchanged the drying medium-water with ethanol or methanol to reduce collapse[5-8].
The 40 pieces were divided in two groups containing quarter-sawed and plain-sawed lumber, where the the numbers for the quarter-sawed lumber were A-1, A-2…A-5; B-1, B-2…B-5; C-1, C-2…C-5; D-1, D-2…D-5, and the numbers for the plain-sawed lumber were a-1, a-2…a-5; b-1, b-2…b-5; c-1, c-2…c-5; d-1, d-2…d-5.
The 40 pieces were divided in two groups containing quarter-sawed and plain-sawed lumber, where the the numbers for the quarter-sawed lumber were A-1, A-2…A-5; B-1, B-2…B-5; C-1, C-2…C-5; D-1, D-2…D-5, and the numbers for the plain-sawed lumber were a-1, a-2…a-5; b-1, b-2…b-5; c-1, c-2…c-5; d-1, d-2…d-5.
Online since: October 2011
Authors: Bo Yu, Yu Lu, Chun Yan Ma, Chu Ying Tang
Today, soybean proteins are considered the most important source of bioactive peptides and an increasing number of bioactive peptides have been identified in soybean protein hydrolyzates and fermented soybean food.
From Table 1, it can be seen that a great number of peptides were yielded during the fermentation of soybean.
“Soy-Based Fermented Foods”, Encyclopedia of Grain Science, 2004, pp.174-185
From Table 1, it can be seen that a great number of peptides were yielded during the fermentation of soybean.
“Soy-Based Fermented Foods”, Encyclopedia of Grain Science, 2004, pp.174-185