scholarly journals Molecular mapping of poly(methyl methacrylate) super-helix stereocomplexes

2015 ◽  
Vol 6 (2) ◽  
pp. 1370-1378 ◽  
Author(s):  
Andrew Joseph Christofferson ◽  
George Yiapanis ◽  
Jing Ming Ren ◽  
Greg Guanghua Qiao ◽  
Kotaro Satoh ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Triple Helix ◽  
Molecular Mapping ◽  
Double Helix ◽  
Poly Methyl Methacrylate ◽  
Single Helix

The structure of the it-/st-poly(methyl methacrylate) (PMMA) triple-helix stereocomplex is composed of a double helix of it-PMMA of 9 units per turn surrounded by a single helix of st-PMMA with an average of 20 units per turn.

scholarly journals Experimental Study of the Bearing Capacity of Helix Pile Foundation

2021 ◽  
Vol 921 (1) ◽  
pp. 012064
Author(s):  
P R Sangle ◽  
L Febriani
Keyword(s):  
Experimental Study ◽  
Bearing Capacity ◽  
Pile Foundation ◽  
Triple Helix ◽  
Double Helix ◽  
Peat Soil ◽  
Pile Foundations ◽  
Hard Soil ◽  
Supporting Structures ◽  
Single Helix

Abstract The use helix pile foundations in supporting structures on peat soil has became a challenge for road infrastructure. The helix pile foundation is an alternative for substituting the pile foundation if hard soil is located too far from the surface. Therefore, in this study we examine the bearing capacity of the helix pile foundation on peat soil, including analyzing the effect of the number of helix plates on the bearing capacity of the peat soil. The type of foundation used is a helix pile foundation with a single blade, double blades and triple blades. From the results of the research the bearing capacity of helix double is 35% greater than the bearing capacity of a single helix, the value of triple helix bearing capacity is 25% greater than the double helix and 70% of the single helix. The more number of helix plates used, the greater the bearing capacity of the piles given.

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