Esplanade, Sub-base, and Pavement Construction Guidelines
Esplanade Construction
Definition
The esplanade is the finished surface of an embankment or excavation. It supports the sub-base, base, and pavement layers.
Geotechnical Characteristics (50cm Depth)
- Particle size analysis
- Atterberg limits
- CBR
- Water table status
Level Terraces
Packed in 20-25cm layers:
- 90% AM (coherent soil)
- 95% PM (non-coherent soil)
In the last 50cm of the bank:
- 95% AM
- 100% PM humidity
Moisture Content for PM Esplanade
Start work when soil humidity (h) in the top 50cm is:
h < H + 2
Where H =
Read MoreStructure of the Universe and Plate Tectonics
Structure of the Universe
Galaxies
Galaxies are grouped in clusters called superclusters, which are arranged in filaments. They are accumulations of cosmic dust, nebulae, and stars. The space between galaxies is called the interstellar medium.
The Milky Way
The Milky Way is a spiral galaxy with nebulae, dust, and 10 to 30 million stars. Our sun is located in one of its arms.
Parts of the Milky Way:
- Medulla or Nucleus: A cluster of old stars, possibly with a black hole in the center.
- Disk: Contains cosmic
The Causes and Consequences of World War II
The Causes of World War II
Several factors contributed to the outbreak of World War II:
- The 1929 economic crisis: The global economic downturn created instability and resentment.
- Aggressive policies of totalitarian states: Germany (Hitler), Italy (Mussolini), and Japan pursued expansionist policies.
- Consequences of the Treaty of Versailles: The treaty imposed harsh penalties on Germany, fostering a desire for revenge.
- Appeasement by Western democracies: Weakened by economic problems, Britain and France
Social Transformations in 19th Century Spain: Rise of the Labor Movement
Social Transformations in 19th Century Spain
Population Growth and the Shift to a Class Society
Spanish society underwent significant changes in the 19th century, particularly after the death of Fernando VII in 1833. The old stratified social structure, based on estates with differing rights and obligations, began to give way to a class society where income became the primary factor in social division. This period also saw a significant increase in population due to improvements in nutrition, medical
Read MoreUnderstanding Physical Quantities and Their Measurement
Physical Size
Definition
Every measurement aims to assign a numerical value to a property of an object, such as length or area. These properties, known as physical quantities, can be quantified by comparison with a standard.
Examples of Physical Quantities
Examples include mass, length, time, density, temperature, speed, acceleration, and energy.
Types of Physical Quantities
Physical quantities can be classified based on several criteria:
- Mathematical form: scalars, vectors, or tensors.
- Additivity: extensive
Economic & Social Transformation in Spain: 1959-1973
Development: (1959-1973)
During this period, Spain experienced a high-growth economy and underwent industrialization. This led to a developed urban phenomenon, an increase in the average standard of living, and significant social change, all while under the Franco dictatorship.
1. Economic Development:
In 1959, an economic stabilization plan was implemented to stimulate the economy. Key elements of this plan included:
- Foreign investments, credits, and equity
- Foreign exchange from Spaniards working in