Experimental Study on Ionic Soil Stabilizer Keeping the Hole Diameter of Clay Stratum in HDD

ICPTT 2011 ◽  
2011 ◽  
Author(s):  
D. S. Cui ◽  
W. Xiang ◽  
Q. Chen
Keyword(s):  
Experimental Study ◽  
Hole Diameter ◽  
Soil Stabilizer

scholarly journals Response of round-hole tubes submitted to pure bending creep and pure bending relaxation

2021 ◽  
Vol 13 (9) ◽  
pp. 168781402110491
Author(s):  
Kuo-Long Lee ◽  
Bo-You Liu ◽  
Wen-Fung Pan
Keyword(s):  
Experimental Study ◽  
Aluminum Alloy ◽  
Theoretical Analysis ◽  
Research Team ◽  
Hole Diameter ◽  
Thickness Ratio ◽  
Experimental Results ◽  
Round Hole ◽  
Pure Bending ◽  
Time Relationship

This paper presents experimental study on the response of 6061-T6 aluminum alloy round-hole tubes with five different hole diameters of 2, 4, 6, 8, and 10 mm and four different diameter-to-thickness ratios of 30, 40, 50, and 60 submitted to pure bending creep and pure bending relaxation. Pure bending creep or relaxation is defined as bending the tube to the required moment or curvature and maintaining that moment or curvature for a period of time. The experimental results of pure bending creep show that the curvature increases with time. In addition, larger holding moment, diameter-to-thickness ratio, or hole diameter results in larger creep curvature. As the curvature continues to increase, the round-hole tube eventually breaks. The experimental results of pure bending relaxation show that the relaxation moment decreases sharply with time and tends to a stable value. In addition, larger holding curvature, diameter-to-thickness ratio, or hole diameter results in larger drop of the relaxation moment. Due to fixed curvature, the round-hole tube does not break. Finally, formulas proposed by the research team of Pan et al. were respectively improved to simulate the creep curvature-time relationship for pure bending creep in the initial and the secondary stages and the relaxation moment-time for pure bending relaxation. After comparing with the experimental results, it is found that theoretical analysis can reproduce the experimental results reasonably.

scholarly journals Experimental Study of Post Installed Rebar Anchor Systems for Concrete Structure

2020 ◽  
Vol 16 (2) ◽  
pp. 308-319
Author(s):  
Haidar H. Haidar ◽  
Faten I. Mussa ◽  
Abbas O. Dawood ◽  
Ahmed A. Ghazi ◽  
Rassel A. Gabbar
Keyword(s):  
Experimental Study ◽  
Bond Strength ◽  
Hole Diameter ◽  
The Other ◽  
Bonding Agents ◽  
Pull Out ◽  
Varied Chemical ◽  
Anchor Systems ◽  
Cylindrical Samples ◽  
Concrete Interface

AbstractThis study investigated the effectiveness of several types of adhesives used in post-installed rebar connections as a bonding agent between steel reinforcement bars and old concrete under pull out test. The experimental samples were; cylindrical samples of (150 mm dia. × 300 mm high) with anchors rebar of varying diameter (12 and 16 mm), different embedded length (100 and 150) mm with different holes’ diameters. The strategy of control were cast-in-place rebar concrete specimens while other samples are post-installed rebar concrete specimens of varied chemical adhesives as bonding agents, namely KUT EPOXY ANCHOR ‘NS’ and SIKAFLOOR169. The output showed that the different adhesives yielded closed pull-out load values. It is found that the pull-out capacity (bond strength) is increased by increasing the embedded length, the diameter of the rebar and slightly with the diameter of the hole. In addition, the failure mode of post-installed rebar concrete was governed by the embedded length and the area of contact with the adhesives. On the other hand, the larger diameter of rebar favors splitting or failure of concrete due to higher strength in binder-rebar interface compare to the binder-concrete interface. The results showed that the pull-out load was increased by (26 % and 32 %) as the rebar diameter increased from 12 mm to 16 mm for KUT “NS” and SIKAFLOOR respectively. The hole diameter had slightly effect of the pull out load where the average of increment was only 6 %. Finally, the bonding strength is considerably depended on the embedded length and less affected by the type of epoxy.

Experimental Study on Ionic Soil Stabilizer Reinforcing Red Clay

2011 ◽  
Vol 183-185 ◽  
pp. 1736-1740
Author(s):  
Xue Song Lu ◽  
Xiang Wei
Keyword(s):  
Experimental Study ◽  
Surface Tension ◽  
Water Resources ◽  
Zeta Potential ◽  
Shear Test ◽  
Clay Soil ◽  
Tension Test ◽  
Red Clay ◽  
Republic Of China ◽  
Soil Stabilizer

In this research, a kind of Ionic Soil Stabilizer (ISS for short) is used as great extension of Ministry of Water Resources of the People’s Republic of China. Based on the red clay of Hanyan district of Wuhan reinforced by Ionic Soil Stabilizer, the red clay soil is treated by different matches of ISS and water at first, then is tested in the Atterberg limits test, dirct shear test and surface tension test. The results show that the plastic index decreases, and the cohesion increases after mixing the ISS into the red clay. In addition, Once ISS is dissolved in water, it can reduce the surface tension of water, and with the concentration increasing, the surface tension decreased. Finally the mechanism how ISS reinforces the red clay is analyzed by the aspect of the structure of pair-electricity layer and the Zeta potential.

scholarly journals An experimental study on hole quality and different delamination approaches in the drilling of CARALL, a new FML composite

2021 ◽  
Vol 49 (4) ◽  
pp. 950-961
Author(s):  
Ergün Ekici ◽  
Ali Motorcu ◽  
Ensar Yıldırım
Keyword(s):  
Experimental Study ◽  
Hole Diameter ◽  
Hole Quality ◽  
Delamination Factor ◽  
Circularity Error ◽  
D Values ◽  
Delamination Damage

In this study, the hole quality was investigated in the drilling of CARALL composite. In addition, the delamination factor calculation approaches of Chen, Davim, and Machado were compared in terms of the delamination damage at the hole entrance surface. Chen's approach is based on the conventional delamination factor (F d) and Davim's on the adjusted delamination factor (F da). Finally, Machado's approach is based on the minimum delamination factor (F min). The values closest to the nominal hole diameter value were obtained with the uncoated (T1), followed by the TiN-TiAlN-coated (T2) and TiAl/TiAlSiMoCr-coated (T3) carbide drills, respectively. The average circularity error values for the hole top and bottom surfaces were 6.184 µm, 7.647 µm, and 8.959 µm for T1, T2, and T3 tools, respectively. Delamination factor values varied between 1.174 and 1.804. The F da values were found to be the highest, followed by F d values, with F dmin values determined as the lowest.

Kerf Profile Characteristics in Abrasive Air Jet Micromachining

2013 ◽  
Vol 797 ◽  
pp. 33-38
Author(s):  
Jing Ming Fan ◽  
Jun Wang
Keyword(s):  
Experimental Study ◽  
Processing Parameters ◽  
Hole Diameter ◽  
Kerf Width ◽  
Depth Of Cut ◽  
Taper Angle ◽  
Air Jet ◽  
Kerf Taper ◽  
Amorphous Glass ◽  
Profile Characteristics

Abrasive jet micromachining (AJM) is a promising technology for processing brittle materials. Based on an experimental study of hole and groove machining on an amorphous glass by abrasive air jet, the effects of processing parameters on the produced structure profile such as groove width or hole diameter, depth of cut and kerf taper angle are analyzed. It shows that the stand-off distance has a significant effect on the kerf width. Both the hole diameter and kerf width increase notably with an increase in stand-off distance. Positive correlation has been found between the depth of cut and air pressure. Under the same cutting conditions, low taper angle can be achieved when using small nozzles.

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