Sökning: "Optimum moisture content"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden Optimum moisture content.

1. 1. Effect of Compactive Effort on the Behaviour of a Gypsiferous Subgrade Soil

   Författare :Dina K Kuttah; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Gypsum; Soil; Clay; Compaction; California bearing ratio; Triaxial; Moisture content; Pore water pressure; 62 Road: Soil mechanics; 62 Road: Soil mechanics;

   Sammanfattning : Presented in this thesis is a study of the effect of compactive effort and long-term soaking on strength, stiffness and deformation characteristics of a gypsiferous subgrade soil from Kirkuk city.The tested soil is sandy lean clay (CL) according to the Unified Soil Classification System and A-6 (6) soil according to AASHTO soil classification system. LÄS MER

3. 2. Characterising the Deformation Behaviour of Unbound Granular Materials in Pavement Structures

   Författare :Mohammad Shafiqur Rahman; Sigurdur Erlingsson; Charles Schwartz; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; unbound granular materials; resilient modulus; permanent deformation; moisture; model; multistage; repeated-load triaxial test; Transportvetenskap; Transport Science; Civil and Architectural Engineering; Byggvetenskap;

   Sammanfattning : Unbound granular materials (UGMs) used in the base and sub-base layers of flexible pavements play a significant role in the overall performance of the structure. Proper understanding and characterization of the deformation behaviour of UGMs in pavement structures are, therefore, vital for the design and maintenance of flexible pavements. LÄS MER

4. 3. Dielectric Response and Partial Discharge Diagnostics of Insulation Systems by Utilizing High Voltage Impulses

   Författare :Roya Nikjoo; Hans Edin; Andrea Cavallini; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Dielectric Response; Transients; Transformer bushing; Oil-impregnated paper; Moisture content; Partial discharge; Surface PD; Cavity PD; Superimposed impulse; Nanoparticles; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : In this thesis, power system transients are considered as an opportunity for development of on-line diagnostics of power components and specifically the insulation systems of power transformers and bushings.A new technique for on-line dielectric response measurement of power transformer bushings is proposed which utilizes natural transients in the power system, such as lightning and switching surges, as stimuli. LÄS MER

5. 4. Some Aspects of Foamed Bitumen Technology

   Författare :May Namutebi; Björn Birgisson; Umaru Bagampadde; Jonas Ekblad; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Foamed bitumen; Aggregate coating; Rice density; Foam characteristics; Surface energy; Locking concept; Gyratory; Compaction; Optimum moisture content; Other civil engineering and architecture; Övrig samhällsbyggnadsteknik och arkitektur;

   Sammanfattning : Although foamed bitumen has been widely applied in pavement construction some of its aspects are still not yet understood. In this study, some of these aspects including: effects of the foaming process on binder chemistry, characterization of foamed bitumen and development of a rational method to optimize foam characteristics, evaluation of aggregate particle coating within foamed bitumen treated materials, and development of a gyratory compaction procedure for laterite gravels treated with foamed bitumen were addressed. LÄS MER

7. 5. From Laboratory to System. Studies of Superheated Steam Drying of Biofuel

   Författare :Hans Björk; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; energy-system; dynamic; superheated steam drying; equilibrium moisture content; organic emissions; life cycle assessment LCA ; biofuel; optimisation; design;

   Sammanfattning : Replacement of fossil fuels by more sustainable fuels such as biofuels has become increasingly important during the last decade. This is mainly due to economical and environmental reasons. LÄS MER