CA Engineer

26/05/2026

26/05/2026

Concrete Slump Test & Slump Values

The concrete slump test is used on construction sites to check the workability and consistency of fresh concrete. A slump cone is filled with concrete, then lifted vertically to measure how much the concrete settles.

Low slump → Stiff concrete, less workable

Medium slump → Normal workable concrete

High slump → More fluid concrete, easier to place

Very high slump → Excess water may cause segregation

Typical slump range for normal RCC work: 75–100 mm.

26/05/2026

የሀይዌይ ጂኦሜትሪክ ንድፍ መርሆዎች የሀይዌይ ጂኦሜትሪክ ዲዛይን አስተማማኝ እና ቀልጣፋ የመንገዶች አቀማመጥ ላይ ያተኩራል። የንድፍ ፍጥነትን፣ የከፍታ ከፍታን፣ የእይታ ርቀትን፣ ኩርባዎችን፣ ግሬዲየንቶችን፣ ካምበርን፣ ንጣፍ ማስፋትን፣ እና የተደላደለ የትራፊክ ፍሰት፣ ደህንነትን እና ትክክለኛ የፍሳሽ ማስወገጃን ለማረጋገጥ ክፍል-አቋራጭ እቅድን ያካትታል።
CA Engineer

26/05/2026

A decades-old scientific prediction once warned that November 13, 2026 could mark humanity’s collapse 🌍⏳😳

In 1960, physicist Heinz von Foerster used population growth mathematics to argue that unchecked human expansion could eventually push Earth beyond its limits through resource shortages, environmental damage, and conflict ⚠️📈

While most experts today do not view the prediction as a literal “end of the world” date, the warning still feels relevant in modern discussions about climate change, food security, and sustainability 🌱🌎

24/05/2026

🚧 የ ግንባታው ዘርፍ አደጋ ላይ መውደቁን የ አንጋፋው ሰንሻይን ተቋራጭ ባለቤት የሆኑን አቶ ሳሙኤል ታፈሰ ገለፁ ⚠️

‼️ በ ዘርፉ የ ዋጋ ንረት ከ 400% በላይ መሆኑን ገልፀዋል

💭 አሸዋ አንድ ሲኖ 100ሺህ ብር ገብቷል
🌋 ሲሚንቶ ኩንታል 2000 ብር ገብቷል
🪨 ጠጠር አንድ ሲኖ 80 ሺህ ገብቷል

🧊 C30 ኮንክሪት 19,000 ብር ገብቷል
⛓️‍💥 ፌሮ በ ኪሎ 250 ብር ገብቷል
CA Engineer

24/05/2026

Mechanical stress is the internal resistance of a material to an externally applied force, measured as force per unit area. It is categorized into five primary types based on how the force is applied.
1. Compressive Stress

What it is: A squeezing or pushing force acting perpendicular to the material.

Effect: The material compresses, shortens, or bulges outwards.

Example: The concrete pillars supporting a building or columns in a parking garage.

2. Tensile Stress
What it is: A pulling or stretching force acting perpendicular to the material's surface.

Effect: The material elongates and gets thinner.

Example: A steel cable holding a suspension bridge or a rope being pulled from both ends.

3. Bending Stress
What it is: A combination of both tensile and compressive stresses, occurring when an external load is applied perpendicular to the length of an object (like a beam), causing it to curve.

Effect: The outer curve stretches (tension) while the inner curve is squished (compression).

Example: A wooden shelf holding heavy books, sagging in the middle.

4. Torsional Stress
What it is: A twisting force applied to an object along its axis.

Effect: It creates internal shear stresses that cause the material to rotate or twist out of shape.

Example: Wringing out a wet towel or a driveshaft transmitting power to a vehicle's wheels.

5. Shear Stress
What it is: Forces acting parallel to the surface, causing adjacent layers of the material to slide past each other in opposite directions.

Effect: The material undergoes a shape change (e.g., a square becoming a parallelogram) or ruptures along a plane.

Example: Two plates bolted together where the bolt prevents them from sliding; the force across the bolt is shear stress.

23/05/2026

ሙሉ ንድፍ እዚህ ይገኛል እኛን ያግኙን!