1093/oxfordhb/9780199566020.001.0001/oxfordhb-9780199566020-e-7#oxfordhb-9780199566020-div1-45 From Case Studies to Social Science: A Strategy for Political Research Robert H. Bates The Oxford Handbook of Comparative Politics Edited by Carles Boix and Susan C. Stokes Abstract and Keywords This article presents a strategy for political research. It first explores the ways people comprehend and briefly discusses the forms of comprehension. The next section introduces the author’s fieldwork in the coffee zones of East Africa
Premium Political science Public administration Case study
The greatness of Roman architecture is built‚ quite literally‚ upon the foundation of two important items: the discovery of concrete and the adoption of the arch from the Greeks. Concrete was an exceptional development within the Roman world and catapulted Roman construction into new heights of efficiency and stability. According to Kamm (1995)‚ the origin of Roman concrete can be found in a volcanic earth known as pozzolana‚ initially found near the Greek settlement of Puteoli. It would later be
Premium Roman Empire Ancient Rome Concrete
Donaldson Literary Essay The song “Concrete Angel” is written by Stephanie Kay Bentley and Rob Crosby. The song was sung by Martina McBride and published in 2002. This song is about a young girl in a world of abuse and handles getting past it every day. The little girl is described as from a place of depression‚ violence‚ and loneliness. The lyrics and their positioning‚ along with the many metaphors‚ similes and repetitions used‚ explain the deeper meaning of this song “Concrete angel”. In the
Premium Concrete Angel Metaphor Simile
BRE Concrete mix design method A popular simplified mix design method is that from BRE. Compressive strength is‚ in general‚ related to durability. The greater the strength the more durable the concrete. To satisfy the required compressive strength‚ a value for water/cement (w/c) ratio is estimated for an appropriate test age (generally 28 days) and cement type. Tables in the BRE mix design handbook are consulted relating aggregate:cement (a/c) ratio‚ workability and water:cement (w/c) ratio for
Premium Concrete
having the right type of concrete mixer can ensure that you will do a job in excellence. There are several tools and types of concrete mixers that can be used to ensure that your job gets done easier. The first type of concrete mixer that you may want to consider using is a mobile concrete dispenser. ball mill manufacturer is used to batch concrete in one area then move to another area. Usually‚ these dispensers are used to pour sidewalks and other projects that need concrete batched into several areas
Premium Concrete Mix
been approved for use by agencies of the Department of Defense. e1 NOTE—Range value in 12.2.2 was editorially corrected July 2001. 1. Scope 1.1 This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the seven types as follows: 1.1.1 Type A—Water-reducing admixtures‚ 1.1.2 Type B—Retarding admixtures‚ 1.1.3 Type C—Accelerating admixtures‚ 1.1.4 Type D—Water-reducing and retarding
Premium Concrete
Strength of concrete Chapter 6 Properties of concrete :- Strength Durability Impermeability Volume stability Strength of concrete is the most valuable property. What is strength? Strength depends on the physical structure and volume of hydration products. Therefore it gives an idea of the quality of concrete. Note :- strength depends less on the chemical composition of the paste and more on the physical structure
Premium Materials science Compressive strength Elasticity
soil Vegetation Tool Kit for Engineers 4.10/ P/ 2 Non Structural cracks: Moisture Changes Building materials expand on absorbing moisture and shrink on drying. These are generally reversible. Shrinkage in concrete or mortar depends on a number of factors • Cement concrete: Richer the mix greater is the drying shrinkage. • Water content: More water in mix induces greater shrinkage • Aggregates : Large aggregates with good grading has less shrinkage for same workability as less water
Premium Concrete
POLYMER COCNCRETE 1. Introduction Despite being thought of as a modern material‚ concrete has been in use for hundreds of years. The word concrete comes from the Latin concretus‚ which means “mixed together” or compounded. Concrete is an extremely popular structural material due to its low cost and easy fabrication. Concrete is made up of sand or stone‚ known as aggregate‚ combined with cement paste to bind it. Aggregate can be of various sizes. It is broadly categorized as fine (commonly
Premium Concrete
placed in a cube and allowed to dry forming the concrete testing cube. Each of the four blocks containing different compositions of each material were then placed in a compressive testing machine and when each cube yielded‚ results were taken. Effect of water content on workability of fresh concrete: As more water was added to the dry mixture‚ it became easier to work with but we had to be careful not to add to much water or this would weaken the concrete and possible ruin the mixture. If you wanted
Premium Concrete