👉የምዝገባ ጊዜ መራዘሙን ስለማሳወቅ

💫የአዲስ አበባ ቤቶች ልማት ኮርፖሬሽን ከደረጃ 1-7 ላሉ ሥራ ተቋራጮች ያወጣው የጋራ መኖሪያ ቤት ግንባታ የስራ ተቋራጮች ምዝገባ ከተለያዩ ተሳታፊዎች በቀረቡት አስተያየቶች መሰረት የስራ ተቋራጭ ምዝገባ ቀነ-ገደብ ማራዘም አስፈላጊ ሆኖ አግኝተነዋል ፣ በመሆኑም ምዝገባው ከዛሬ ሕዳር 30 ቀን 2018 ዓ.ም ጀምሮ ለተጨማሪ 5 ተከታታይ ቀናት እስከ ታህሳስ 4 ቀን 2018 ዓ.ም ሌሊት 6:00 ሰዓት ድረስ መራዘሙን ኮርፖሬሽኑ ያሳውቃል።

🚧ስለሆነም፣ ሳትመዘገቡ ለዘገያችሁ ተቋራጮች፣ ይህንን የመጨረሻ ዕድል ተጠቅማችሁ በኦንላይን https://aahdcgeneral.et በመግባት እንድትመዘገቡ ጥሪ እናቀርባለን፡፡

🏷በምዝገባው ሂደት እና ከምዝገባ በኋላ ለሚኖራችሁ ጥያቂ፣ ቅሬታ https://aahdcgeneral.et/complaints/create ወይም በቴሌግራም https://t.me/aahdcsupport ማቅረብ የምትችሉ መሆኑን እንገልፃለን።

የአዲስ አበባ ቤቶች ልማት ኮርፖሬሽን

@etconp

👉Let Me Tell You About Cement

⭐️The recommended maximum time to store packed cement is 3 months from the date of manufacture if stored in typical site conditions.

⏺With ideal, moisture-proof storage (such as in an airtight container or a completely dry silo), it might last up to 6 months or even a year, but this is less common and strength loss is still a factor. 

🚧Why Cement Has a Limited Shelf Life

⏺Cement is highly hygroscopic, meaning it absorbs moisture from the air, which starts the chemical reaction (hydration) that causes it to harden.

⏺Once this process begins inside the bag, the cement loses its intended binding strength and performance. 
Strength Loss Over Time
If stored for longer periods, the cement's strength decreases significantly: 

🚧After 3 months: May lose 20–30% of its original strength.
🚧After 6 months: May lose up to 40–50% of its strength.
🚧After 12 months: May lose more than 50% of its strength. 
When to Test or Discard

🏷For structural projects (e.g., foundations, beams): It is highly recommended to use fresh cement (within 3 months of the manufacturing date) to ensure structural integrity.

🏷For non-structural projects (e.g., patching, small garden walls): You may use older cement, provided it is still in a fine, free-flowing powder form without hard lumps, but it is best to perform a small test mix first to confirm it sets properly.

⏺If you notice hard lumps in the bag: The cement has likely absorbed too much moisture and should be discarded, as it will not perform as expected. 
Always follow the "First In, First Out" (FIFO) principle when using cement from storage to ensure the oldest bags are used first. 

@etconp

👉 INTERCON Construction Chemicals 

● Concrete Admixtures
● Bonding Agents
● Waterproofings
● Wall Putty, Prime Coat
● Concrete Repair Mortar
● Floor hardener, Epoxy
● Grout, Self-level mortar
● Quartz paint, Contextra
● Tile Adhesive & Tile Joint Fillers 
● Geotextiles and other construction chemicals and materials

☎️ Tel: 0961955555

🔹 Address 1: Signal road, around
      Dinberwa Hospital

🔹 Addres 2: Wellosefer, Infront of
     Dani Plaza

👉FULL STEPS: CONCRETE CUBE TEST (From Beginning up to Testing)

🚧1. Materials & Tools Required

⏺Cement, sand, aggregate, water
⏺Cube moulds (150 mm × 150 mm × 150 mm usually)
⏺Trowel, vibrator or tamping rod
⏺Weighing machine
⏺Curing tank or water container
⏺Compression testing machine (CTM)

🚧2. Preparation of Cube Moulds

⏺Clean the moulds.
⏺Apply oil on all inside surfaces to avoid sticking.
⏺Assemble moulds tightly with bolts.
⏺Place moulds on a flat, rigid surface.

🚧3. Concrete Mixing

🏷A. Measure materials

⏺Cement, sand, aggregate based on mix ratio (e.g., 1:2:4, or M20, M25 etc.).
⏺Measure water using correct water–cement ratio.

🏷B. Mix

⏺Mix thoroughly until uniform (by hand or mixer).

🚧4. Filling the Cube Moulds

⏺Fill the mould in three layers.
⏺Tamp 25 times using tamping rod OR Vibrate for 5–10 seconds Each layer.
⏺Make sure no air voids are left.
⏺Top surface must be leveled with a trowel.

🚧5. Initial Setting / Demoulding

⏺Keep the filled moulds undisturbed for 24 hours in a shaded place.
⏺After 24 hours, remove (demould) the cubes carefully.

🚧6. Curing

⏺Place cubes in a curing tank full of clean water.
⏺Temperature should be 20–27°C.
⚡️Cure for: 7 days test,
14 days test (optional),
28 days test (standard strength)

🚧7. Testing on Compression Machine

📍A. Preparation

⏺Remove cube from water at least 1 hour before testing.
⏺Clean surface and measure dimensions using a vernier caliper (to find exact area).

📍B. Placement in Machine

⏺Place cube on CTM between plates.
⏺Ensure cast/leveled face is on top (smooth face facing upwards).
⏺Center the cube properly.

📍C. Load Application

⏺Start the machine.
Apply load gradually at a rate of: 140 kg/cm² per minute (or ~2.9 kN/s).
⏺Continue until cube fails/cracks.

🏷8. Calculations

❇️For a 150 mm cube:
Area = 150 × 150 = 22500 mm²

⭐️Example:
Load at failure = 450 kN
Strength = 450,000 N / 22,500 mm² = 20 MPa

📜9. Reporting
Include:

⏺Mix ratio / grade
⏺Cube ID number
⏺Age (7 or 28 days)
⏺Load at failure
⏺Compressive strength
Average of 3 cubes
Any visual observations of cracks

@etconp

👉To all Ethiopian construction and engineering professionals:

💫A short 5 - 7 minute industry survey has been prepared to help identify the real challenges and opportunities in our construction sector.

🚧Every member’s response is extremely important… the insights collected will directly contribute to improving workflows, communication, and digital practices across the industry.

❇️Please take a few minutes to fill it out and share it with others in the field.

⭐️Your participation will have a real impact. 🙏🏾

📜Survey Link:👇
https://forms.gle/ib3T13VnpCPzX2CZ6

👉Type Of Culvert

🚧1. Pipe Culvert: Circular pipe, used for small drainage flow.

🚧2. Box Culvert: RCC rectangular shape, suitable for large water discharge.

🚧3. Slab Culvert: RCC slab supported on abutments, used for narrow canals.

🚧4. Arch Culvert: Arch-shaped structure, strong and durable for moderate flow.

🚧5. Bridge Culvert: Acts like a small bridge with water passing underneath.

🚧6. Pipe Arch Culvert: Modified pipe culvert with arch shape used where low height is required.

@etconp

ADVERTISMENT

ታምራት ፕሌት እና ጄ ቦልት አቅራቢ

✅የምንሰጣቸው አገልግሎቶች

🔅 ፕሌት any Size & thickness
🔅 ጄ ቦልት (ጥርስ ማዉጣትና ማጠፍ)

🔅 የተለያዩ  [modefic] ስራዎችን እንሰራለን።

♦️ ማንኛዉንም ብረታ ብረት እንገዛለን።

☎️ስልክ 0904040477 ወይም 0911016833 ደውለው ያግኙን
📱ቴሌግራም ላይ ፦https://t.me/heavenic1

አድራሻ፦  ቁ 1.መርካቶ
                ቁ.2 አየር ጤና  ኪዳነ ምህረት

ጥራትና ታማኝነት መለያችን ነው።
ታምራት ፕሌት እና ጄ ቦልት አቅራቢ

👉For normal concrete mixing:

💫Mixer Rotation Time (Drum Mixer)

⏺Minimum: 1.5 minutes
⏺Standard: 2–3 minutes after all materials are inside

⏺Maximum: No need to exceed 5 minutes (too long can cause segregation)

🏷If using a small site drum mixer:

⏺1 bag mix: 2–3 minutes
⏺½ bag mix: 1.5–2 minutes

🚧Important Notes

⏺Start the mixer first → add coarse aggregate + some water → then sand + cement → remaining water.

⏺Overmixing makes concrete harsh and may reduce strength.

⏺Undermixing gives weak, nonuniform concrete.

@etconp

👉the order of adding materials into the mixer DOES have an effect on the concrete quality

✅ Correct order (recommended)

1st Coarse aggregate (stone)
2nd Some water
3rd Sand
4th Cement
then The Remaining water

🏷This gives the best mixing efficiency and uniform strength.

❌For Example If you add in this order:
1. Sand → 2. Cement → 3. Aggregate

⚡️It can cause these problems:

⏺1. Cement sticks to sand (balling) Sand and cement form lumps also Harder to coat all aggregates.

⏺2. Poor coating of aggregate :-Cement paste won’t cover all stones properly.
Concrete becomes weak and non-uniform.

⏺3. Longer mixing time needed

⏺Mixer struggles to break cement–sand lumps.

⏺4. More dust and loss of fine materials

⏺Cement may blow out before water is added.

⭐ Conclusion

⚡️Mixing sand + cement first, then aggregate is not recommended.

⏺It will reduce workability, can reduce strength, and may require extra mixing time.

@etconp

👉የሶፍ ዑመር የባቡር መንገድ ግንባታ በተያዘው ዓመት ይጠናቀቃል

🚧በሶፍ ዑመር ዋሻና ሎጅ ፕሮጀክቶች ውስጥ ለቱሪስት አገልግሎት መስጫ እየተገነባ የሚገኘው የባቡር መስመር በተያዘው ዓመት እንደሚጠናቀቅ የኢትዮጵያ ምድር ባቡር ኮርፖሬሽን አስታወቀ።

የኢትዮጵያ ምድር ባቡር ኮርፖሬሽን የባቡር ዘርፍ ምክትል ስራ አስፈጻሚ ኢንጂነር ስለሺ ካሳ ለጋዜጣ ፕላስ እንደገለጹት፤ የባሌ አካባቢን ቱሪዝም ለማሳደግ ሶፍ ዑመር ላይ እየተገነባ ያለው የባቡር መንገድ ግንባታ በዚህ ዓመት ይጠናቀቃል።

ኢትዮጵያ ከአሏት ዕምቅ ሀብቶች መካከል አንዱ ቱሪዝም ነው ያሉት ኢንጂነር ስለሺ፤ ሀገሪቱን ባላት የቱሪዝም ሀብት ልክ ተጠቃሚ ለማድረግ በትራንስፖርት ማስተሳሰር ቀዳሚ አጀንዳ መሆኑን ጠቁመዋል።

በውስጥ አቅም በመገንባት የመጀመሪያ የሆነው ይህ ፕሮጀክት እስካሁን ከ50 በመቶ በላይ መጠናቀቁን ገልጸው፣ አጠቃላይ ርዝመቱ አምስት ኪሎ ሜትር መሆኑን አስረድተዋል።

የባቡር መንገዱ በቀጣይም እንደ ሁኔታው ሊሰፋ የሚችልበት ዕድል መኖሩን ጠቅሰው፤ ለጎብኝዎች ያለ ስጋት መንቀሳቀስ የሚያስችል መሆኑን አብራርተዋል።

በሀገሪቱ በአጠቃላይ የባቡር መስመሮች ላይ ስራዎች እየተሰሩ መሆኑን የጠቀሱት ኢንጂነር ስለሺ፤ አዋሽ - ኮምቦልቻ - ሀራ ገበያ የባቡር መንገድ ከዚህ በፊት የነበረውን የመሠረተ ልማት ስርቆት ችግር በመቅረፍ ከአማራና ከአፋር ክልሎች ጋር በተሰራ ስራ መቀነስ መቻሉን አያይዘው አመልክተዋል።

የባቡር መስመሩ አገልግሎቱን ለማስጀመር በውስጥ አቅም የመጠገን ተግባራት እየተከናወኑ ሲሆን፤ በቅርቡም ወደ ስራ ለማስገባት እየተሰራ መሆኑን ገልጸዋል።

@etconp

👉What do you think the Problem on the Picture?

🚧Answer: Structure failer due to lack of stability.

⭐️why?

⏺The water tank is placed on a tall, slender steel frame.

⏺There is no cross-bracing (X-bracing or K-bracing) to resist lateral forces (wind, water sloshing, seismic loads, etc.).

⏺Without bracing, the whole frame can sway or buckle sideways under the heavy load of the full water tank (which can weigh several liters).

⏺The small base compared to the height makes it even more unstable.

❇️In short: The stand is dangerously weak against horizontal forces and can collapse.

🎲How to design and what factors to be considered in steel structure design?

We Will Continue to answer this...👆

@etconp

👉Reinforcement bars (rebar) are added to concrete structures for strength, safety, and durability.

🚧Here are the main benefits explained simply:

✅ Benefits of Reinforcement Bars (Rebar) in Building Structures

1. Increases Tensile Strength
Concrete is strong in compression but very weak in tension.

Rebar provides tensile strength, helping the structure resist:Bending,Stretching,Cracking

2. Controls and Minimizes Cracks

Rebar holds cracked sections together and stops cracks from spreading.

This makes the structure safer and more durable over time.

3. Improves Load-Carrying Capacity

Reinforced concrete can support:Heavy loads (floors, beams, slabs)

Dynamic loads (vehicles, wind, earthquakes)

4. Enhances Structural Stability

Rebar helps the building withstand:

Earthquake forces
Wind pressure
Vibration
Settlement

5. Increases Durability and Life Span

Reinforcement bars protect concrete from:

Sudden failure
Fatigue
Wear and tear
This increases the overall life of the structure.

6. Provides Ductility (Warning Before Failure)

Concrete alone breaks suddenly (brittle).

Rebar gives ductility, meaning:
The structure bends before failing People get time to evacuate Collapse is prevented

7. Helps Create Complex Structural Shapes

Reb​​​ar can be bent into:

Beams
Columns
Slabs
Footings
Arches
Allowing more design flexibility.

@etconp

👉በ6 ሰዓታት ውስጥ 2.4 ኪ.ሜ የአስፋልት ንጣፍ ያከናወኑት ቻይናውያን አድስ ሪከርድ አስመዝግቧል

🚧በቤጂንግ የሚገኙ ቻይናውያን የመንገድ ግንባታ ሠራተኞች፤ 2.4 ኪሎ ሜትር ርዝመት ያለውን መንገድ በ6 ሰዓታት ውስጥ ብቻ አስፋልት በማንጠፍ አዲስ ሪከርድ አስመዝግበዋል።

💫በተለምዶ እንዲህ ዓይነቱን የአስፋልት ንጣፍ ሥራ ለማከናወን በርካታ ቀናትን አልፎ ተርፎም ሳምንታትን የሚወስድ ሲሆን፣ ይህም ከፍተኛ የትራፊክ መጨናነቅን ያስከትል ነበር።

⏺ሆኖም እነዚህ ቻይናውያን ባለሙያዎች መንገዱን ለቀናት ከመዝጋት ይልቅ፣ ሥራውን በ6 ሰዓታት ውስጥ ሙሉ በሙሉ አጠናቀዋል።

⏺በሌሎች የዓለም ሀገራት 2.4 ኪሎ ሜትር መንገድን በ24 ሰዓታት ውስጥ ማንጠፍ እንደ ስኬት ቢታይም፣ ይህንን ሥራ በ6 ሰዓታት ውስጥ ብቻ ያጠናቀቀ ከቻይና ውጪ ሌላ ሀገር የለም።

@etconp