Concrete Technology: A Comprehensive Guide
Concrete Technology: A Comprehensive Guide
Phase and Chemical Composition of Portland Cement Clinker
THE COMPONENT PHASES OF PORTLAND CEMENT
- •3CaO.SiO2 (C3S alite) 55-65 %
- •2CaO.SiO2 (C2S belite) 15-24 %
- •3CaO.Al2O3 (C3A tricalcium aluminate) 8-12 %
- •4CaO.Al2O3.Fe2O3 (C4AF brownmillerite) 8-12 %
CHEMICAL COMPOSITION OF CEMENTS
CaO 60 ÷ 67 % SiO2 18 ÷25 % Al2O3 2.5 ÷ 8 % Fe2O3 0.5 ÷ 6 % MgO 0,1 ÷ 4 % SO3 1,7 ÷ 4,6 % Na2O+K2O 0,2 ÷ 2 %
Physical and Mechanical Properties of Cement
• Cement
Read MoreProjectile Motion and Linear Forces in Physics
Positive and Negative Acceleration
| Positive Acceleration (+a) | Negative Acceleration (-a) | |
|---|---|---|
| Positive Initial Velocity (+Vo) |
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| Negative Initial Velocity (-Vo) |
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Acceleration
Read MoreEssential Physics Formulas & Equations
Mechanics
Kinetic Energy
Kinetic energy = ½ x mass x velocity squared
(J) (kg) (m/s)
Gravitational Potential Energy (GPE)
GPE = mass x gravitational field strength x height
(J) (kg) (N/kg) (m)
Weight
Weight = Mass x Gravity
N = kg x N/kg
Density
DENSITY (ρ – greek letter) = mass (m) / volume (v)
Resultant Force
RESULTANT FORCE = MASS X ACCELERATION
F = m x a
Force (Springs)
FORCE = SPRING CONSTANT x EXTENSION
N =
Read MoreOf Mice and Men: A Literary Analysis of Steinbeck’s American Tragedy
Of Mice and Men (1937) by John Steinbeck
Critical Success
Based on his own experiences as a ranch-hand in California during the 1920s, Of Mice and Men achieved critical acclaim.
A Novel of Protest
To what extent is Of Mice and Men a novel of protest? The novel presents a scathing social and economic criticism of American society during the Great Depression.
- Exploitation of the Weak: The story highlights the exploitation of the weak by the strong, revealing a hierarchy even among the poor and disabled
Exploring the Universe: From the Big Bang to Exoplanets
1.1 the observable universe:
It is a gap in the floating galaxies in each galaxy there are thousands of stars, planets and nebulae in the cosmos formula is 70 hydrogen, 20 helium i 5 the other elements
1.2 The dark matter:
Gas and dust of the universe subject to greater gravitational attractions qe matter we can detect. 10 xcinto galaxies in the universe, dark matter 90 remaining, i Propertys unknown composition and does not emit radiation.
3.A universe in motion, not a atonomo permance everything
Animal Behavior: Migration, Kin Selection, and Social Dynamics
Migration
- Monarch butterflies use the position of the sun as a sun compass to guide their migration.
- Polar bears are the world’s largest terrestrial carnivores, hunt seals in the winter on pack ice, and tend to lose body mass in the summer.
- The avian migrant that makes the longest non-stop flight of any land or shorebird is the bar-tailed godwit, which can fly for 3 to 8 days.
- In animals, the pacemaker is an internal clock in the brain that may regulate migratory behavior, feeding behavior, the release