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  • 1
    Electronic Resource
    Electronic Resource
    Carbonation and related reactions of poly(styryl)lithium (1989)
    s.l. : American Chemical Society
    Macromolecules 22 (1989), S. 85-90 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00191a017
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Carboxylation of poly(styryl)lithium using carbon-13-labeled carbon dioxide. Aromatic ring carboxylation (1992)
    s.l. : American Chemical Society
    Macromolecules 25 (1992), S. 2262-2267 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00034a030
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Numerical Modelling of Soft Soil Installed by PVDs (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 340-341 (June 2007), p. 1249-1254 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: One small-scale physical model test on the PVD (Prefabricated Vertical Drain) treatedHong Kong marine clay was simulated using finite element method (FEM) in this study. A UserMATerial (UMAT) subroutine describing an Elastic Visco-Plastic (EVP) constitutive model wasdeveloped and incorporated into one commercial finite element code ABAQUS. A degressivepermeability of the PVD strip was included to consider variations of its permeability during theconsolidation process. The UMAT and the adopted reducing technique were demonstrated to beeffective by good agreement between the observed consolidation settlement and excess pore waterpressures and the simulated ones
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.340-341.1249.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Influence of Soil Dilatancy on Soil Nail Pull-Out Resistance in Completely Decomposed Granite Fill (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 340-341 (June 2007), p. 1237-1242 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Soil nailing, developed from the New Austrian Tunnelling Method, has been widely usedin many countries and regions in the world since the 1970’s. This technique is used to stabilize in situsoil mass by installing a large number of closely spaced unstressed inclusions into the soil mass toincrease its strength and stability. Since the mid 1970’s, several design methods have been proposedbased on laboratory and field tests. Among the design criteria in these methods, the pull-out resistanceof a soil nail is a key parameter that controls the stability assessment of soil nail structure. In theprevious investigations, the soil dilatancy was found to be an important factor that influences the soilnail pull-out resistance especially for drill-and-grout soil nails. In order to study the influence of soildilatancy on soil nail pull-out resistance, laboratory pull-out tests and numerical parametric studieshave been carried out for soil nails in Completely Decomposed Granite (CDG) fill. The results showthat the soil dilatancy has a significant influence on the soil nail pull-out resistance
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.340-341.1237.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    High-frequency resonance in acoustic superlattice of barium sodium niobate crystals (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 2480-2482 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: By using growth striation technique, an acoustic superlattice of barium sodium niobate crystals, the single crystals with the periodic laminar ferroelectric domain structures, has been prepared. High-frequency resonance in the range of 200–400 MHz in such materials has been realized experimentally. The experimental results indicate that the application of acoustic devices with low acoustic loss operating at high frequencies is expected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.351062
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  • 6
    Electronic Resource
    Electronic Resource
    Integrated Utilization of Ultra-Fine Fly Ash—Fluoro Gypsum for Highway Repair (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 302-303 (Jan. 2006), p. 255-262 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: To solve existing problem of cement concrete pavement destruction in China, thecement-based highway repair materials with Ultra-fine Fly Ash (UFA)—Fluoro gypsum as the main ingredients, which are all industrial wastes, are researched by employing UFA for both water-reducing and strength-enhancing. The mutual motivating effect of Fluoro gypsum and UFA during cement hydration is also explored. According to data analysis of experimental results, UFA-Fluoro gypsum high-performance highway repair materials are optimized, and then applied to production of highway rapid repair concrete where mechanical properties and partial long-term properties of the concrete are measured. The results indicate that the 1-day concrete strength closes to or reaches 30MPa, which meets the requirements of highway rapid repair project. The long time performance of concrete is also favorable. Finally, its hydration mechanism is analyzed preliminarily
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.302-303.255.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Experimental Study on Stress-Strain Relationship of New-Old Concrete (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 302-303 (Jan. 2006), p. 536-542 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this paper, full-range compression tests were conducted on prisms of Old concrete, New-Old concrete and High-Performance Rapid Repair Concrete (HPRRC) prisms The complete stress-strain curve of HPRRC incorporating PFAC (pulverized fly ash composite), Old concrete and New-Old concrete were obtained and compared with each other. The essential uniform deformation capacity of three kinds of concrete was verified with the experimental results. At the same time, the unified numerical expressions of the compressive complete stress-strain curves of the three kinds of concrete are put forward. The theoretical curves from calculation are in good agreement with the experimental curves
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.302-303.536.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Numerical Modeling of the Constitutive Relationship of a Soft Rock Using a 3-D Elastic Visco-Plastic Model (2004)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 261-263 (Apr. 2004), p. 723-728 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this paper, a diatomaceous soft rock is studied. Triaxial tests had been conducted on this soft rock. From the test results, it is found that the stress-strain curve of this soft rock has a notable strain-softening tendency. In order to study its time-dependent stress-strain behavior, a constitutive model that can describe not only the strain-hardening behavior, but also the strain-softening behavior must be constructed. Based on Perzyna’s fundamental assumptions of the elastic visco-palstic theory, a visco-plastic flow rule, and Yin and Graham’s 3-D elastic visco-palstic constitutive model (3-D EVP model), the constitutive formulation under a triaxial stress state is obtained in this paper. The derived formulation can be used to simulate the time-dependent stress-strain behavior of both consolidated undrained and consolidated drained triaxial tests of soils and rocks. In this paper, the constitutive formulation is used to simulate the time-dependent stress-strain behavior of consolidated undrained triaxial tests of the soft rock studied in this paper. The simulated results are compared with the triaxial test results. The comparison of the results shows that model predictions agree well with measured results. This demonstrates that the EVP model can be used to describe the time-dependent stress-strain behavior of the soft rock studied in this paper
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/47/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.261-263.723.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Study on the Workability and Mechanical Properties of Recycled Aggregate Concrete Containing Ultra-Fine Fly Ash (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 302-303 (Jan. 2006), p. 314-320 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The subject of concrete recycling is regarded as very important in the general attempt for sustainable development in our times. Due to a wide range of variability of engineering properties for recycled concrete, a large number of experiments are usually required to decide a suitable mixture. Within the scope of this study, 13 different concrete mixtures were manufactured. The amount of recycled concrete aggregate (RCA) were 0 %, 20 %, 40 %, 60 %, 80 %, and 100 %, respectively. The replacement levels of ultra-fine fly ash are 0 %, 15 %, 25 %, 35 % and 50 %, respectively. The physical and mechanical properties along with their workability of concrete produced with RCA and ultra-fine fly ash were investigated. The experiment results showed that ultra-fine fly ash replacement had an important effect on performance of concrete with different amount of RCA
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.302-303.314.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Numerical Simulation of Pressure Grouting in Soil Nail Pull-Out Tests (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 1037-1040 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Soil nailing is a widely used technique for stabilizing slopes and excavations. In all currentdesign methods, the nail-soil interface shear strength, that is, the pull-out resistance of a soil nail is animportant parameter which controls the design and safety assessment of the soil nailing system. Thepressure grouting is a cost effective method for increasing the soil nail pull-out resistance and in turnimproving the performance of the nailed structure. In this paper, a three dimensional (3-D) finiteelement (FE) model for pull-out tests is established and verified by comparing simulated results withmeasured data. This model is then used to simulate the effect of grouting pressure on the soil nailpull-out resistance
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.1037.pdf
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