👉EFFECT OF TEMPRETURE IN CONCRETE CASTING:

💫Temperature has a big influence on concrete casting because it directly affects hydration rate, setting time, workability, and long-term strength.

📜A breakdown for both hot and cold conditions are listed below.

🚧1. In Hot Weather (High Temperature)

⭐️Effects: Rapid water evaporation → reduces workability and slump.

⏺Faster hydration → shortens setting time, making placing & finishing harder.

⏺Higher risk of plastic shrinkage cracks due to quick surface drying.

⏺Increased risk of cold joints if delays happen during pouring.

⏺Possible reduction in long-term strength if water evaporates before proper hydration.

⚡️Precautions:

⏺Use cool mixing water or chilled aggregates.

⏺Cast during cooler times of the day (early morning/evening).

⏺Cover concrete immediately after finishing to reduce evaporation.

⏺Use retarding admixtures to slow setting.

⏺Keep formwork and reinforcement cool before casting.

🚧2. In Cold Weather (Low Temperature)

⭐️Effects:

⏺Slower hydration → delays setting and strength gain.

⏺Risk of freezing water inside fresh concrete → disrupts hydration and weakens structure.

⏺Extended curing time required before formwork removal.

⏺Potential scaling or surface damage if concrete freezes before gaining ~3.5 MPa strength.

⚡️Precautions:

⏺Use warm mixing water or heated aggregates.

⏺Use accelerating admixtures to speed up setting.

⏺Cover concrete with thermal blankets or use heated enclosures.

⏺Avoid casting if ambient temperature is below 5 °C without protection.

⏺General Rule: Concrete performs best when the fresh concrete temperature is kept between 10 °C and 30 °C during casting and early curing.

@etconp

👉JOB VACANCY

🔏የፕሮጀክት ዕቅድ መሀንዲስ

▶️Dead Line :September 4, 2025

📌JOB REQUIREMENT

⭐️ተፈላጊ የትምህርት ደረጃና የሥራ ልምድ: ከታወቀ ዩኒቨርሲቲ/ኮሌጅ በኮንስትራክሽን ማኔጅመንት፣በሲቪል ኢንጅነሪንግ፣በአርክቴክቸር ወይም በተመሳሳይ የትምህርት መስክ የመጀመሪያ ዲግሪ ኖሮት በሙያዉ 4 ዓመት እና ከዚያ በላይ አግባብነት ያለዉ የሥራ ልምድ ያለዉ/ላት

⏺ደረጃ: 10
▶️ብዛት:2
ደመወዝ:ማራኪ ሆኖ አዲስ በተሻሻለው የድርጅቱ ደመወዝ ▶️ስኬል መሰረት
▶️የሥራ ቦታ፡ አዲስ አበባ እና በአካባቢው

💫HOW TO APPLY

⏺የምዝገባ ቀን፡ ይህ ማስታወቂያ በሪፖርተር ጋዜጣ ከወጣበት ቀን ጀምሮ ባሉት ሰባት ተከታታይ የሥራ ቀናት፣በአካል በመቅረብ
⏺ደመወዝ፡- በድርጅቱ ስኬል መሠረት

📌የምዝገባ አድራሻ፡ አያት አክስዮን ማህበር ዋና መ/ቤት (ከመገናኛ ወደ ወሰን ግሮሰሪ በሚወስደው መንገድ ሚካኤል የትራፊክ መብራቱ አጠገብ)

🕹ማሳሰቢያ፡ አመልካቾች ለምዝገባ ሲቀርቡ የትምህርትና የሥራ ልምድ ማስረጃቸውን ዋናውንና የማይመለስ ፎቶ ኮፒ ይዘው መምጣትአለባቸው፡፡

📞አመልካቾች ተጨማሪ ማብራሪያ ቢፈልጉ በስልክ ቁጥር 09-72-57-86-37 ደውለው ማግኘት ይችላሉ፡፡

@etconp

👉China cut a mountain in half to build a highway with the world's tallest bridge, standing at 2,051 feet.
In Guizhou, China has sliced through a mountain to construct a new expressway — and soon, it will feature the world’s highest bridge: the Huajiang Canyon Bridge.

🚧This engineering marvel rises 2,051 feet above the canyon — tall enough to completely hide the Eiffel Tower — and it will transform a previously 70-minute mountainous drive into a smooth, one-minute journey.

💫Built using 49,000 tons of steel and advanced technologies like GPS-controlled cranes and wind sensors, the bridge is expected to open by the end of 2025, and it already has all internet-connected smart systems installed.

@etconp

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👉Hidden Enemies of Concrete: Chlorides & Sulphates

💫Concrete is considered one of the most durable construction materials—but in reality, it is highly vulnerable to certain hidden enemies present in water, soil, or even raw materials.

🚧Among them, Chlorides and Sulphates are the most dangerous.

✅ Positive Effects (in limited amount)

⭐️1. Chlorides:

⏺Small quantity of calcium chloride (CaCl₂) is sometimes added as an accelerator admixture to speed up early strength gain.
⏺Useful in cold weather concreting where rapid setting is needed.

⭐️2. Sulphates:

⏺In controlled form, gypsum (calcium sulphate) is added in cement during manufacturing to regulate setting time.
⏺Prevents flash setting and ensures workability.

❌ Negative Effects (when in excess)

🔰1. Chlorides:

⏺Promote steel reinforcement corrosion by breaking down passive film around rebars.
Lead to cracking, spalling, rust stains, and reduced load-bearing capacity.
⏺Main sources: saline water, marine environment, contaminated sand, de-icing salts.

🔰2. Sulphates:

⏺Cause sulphate attack—leading to expansion, cracking, and softening of concrete.
⏺Reaction with C3A (tricalcium aluminate in cement) produces expansive products (ettringite), damaging structure internally.
⏺Sources: groundwater rich in sulphates, soil, bricks, or certain aggregates.

📌 Key Takeaways for Quality Control:

🎲1. Always test mixing water, aggregates, and soil for chloride & sulphate content.
🎲2. Use sulphate resisting cement or blended cement in aggressive environments.
🎲3. Provide proper concrete cover & waterproofing to resist penetration.
🎲4. In marine/industrial structures, use corrosion inhibitors or protective coatings.

@etconp

👉ክራቸሪ/Base profile/Column starter/Column Kicker/

💫በግንባታ ሥራ ላይ፣ "ክራቸሪ" በዋናነት ለቀጣይ ቋሚ መዋቅር /Vertical structure/ ትክክለኛ ቀጤነት/አቀባዊ ሊኛ/vertical allignment/ እና የቅርጽ ስራን/Formwork/ለማረጋገጥ ከዋናው ቀጣይ ቋሚ መዋቅር ጋር ተመሳሳይ ስፋትና ርዝመት ያለው፣ ለዋናው መዋቅር መሪ/Refference/ ሆኖ የሚሰራ መነሻ ስራ ነው።

🚧ክራቸሪ በ 2 መንገድ ሊሰራ ይችላል::

❇️1ኛ. Column starter formwork
ለዋናው ቋሚ መዋቅር ተመሳሳይ ስፋትና ርዝመት ያለው፣ ለዋናው መዋቅር መሪ መነሻ ሆኖ የሚሰራ ፎርምወርክ ሲሆን

❇️2ኛ Column starter Concrete
ለዋናው ቋሚ መዋቅር ተመሳሳይ ስፋትና ርዝመት ያለው፣ ለዋናው መዋቅር መሪ መነሻ ሆኖ ከ5ሳሜ -10ሳሜ ጥልቀት ያለው ሆኖ የሚሰራ ኮንክሪት ነው።

✍ክራቸሪ ሌላ ምን ጥቅም ይሰጣል? ፃፉልን🙏

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👉TENDER ANNOUNCEMENT

⭐️LOT 46 Health campus remaining Works of Main get and fence construction

⏺Invitation Date Aug 28, 2025

📜Procurement Reference No DMU-NCB-W-0007-2018-BID-Open

💫Procuring Entity :Debremarkos University

📍Country: Ethiopia
⏺Town: DEBRE MARKOS
⏺Street: HADIS ALEMAYEHU
⏺Room Number:27/10

📞Telephone:+251921071526

📩Email:diresbinalfe@gmail.com
Po Box: 269

🚧Object of Procurement LOT 46 Health campus remaining Works of Main get and fence construction

⏺Lot Number 1

⚡️Clarification Request Deadline Sep 9, 2025, 5:00:00 PM

⏺Bid Submission Deadline Sep 22, 2025, 10:00:00 AM

⏺Bid Opening Schedule Sep 22, 2025, 10:30:00 AM

@etconp

👉JOB VACANCY

💫SITE SUPERVISOR

⏺Employment: Full-Time | Permanent
📍Place of Work: Around Gerji Mebrat Hail, Addis Ababa - Ethiopia
⚡️Deadline: September, 02/2025
 
🚧About the Role

⏺On behalf of our client, We are seeking a motivated and detail-oriented Site Supervisor to oversee day-to-day construction activities for our client's real estate and commercial building projects around Gerji Mebrat Hail, Addis Ababa.
⏺The ideal candidate will ensure smooth site operations, maintain quality standards, and manage timelines while coordinating effectively with workers, subcontractors, and management.

🏷Key Responsibilities

⏺Supervise and monitor construction site activities to ensure compliance with project plans and safety standards.
⏺Coordinate with contractors, subcontractors, and suppliers to ensure timely completion of work.
⏺Oversee material usage, site logistics, and daily labor activities.
⏺Conduct regular inspections to maintain quality control on construction progress.
⏺Prepare and submit daily/weekly site reports to project management.
⏺Ensure adherence to health, safety, and environmental (HSE) regulations on site.
⏺Act as the primary point of contact for site-related issues, resolving challenges efficiently.

❇️Qualifications & Skills

⏺Diploma or Bachelor’s degree in Construction Management, Civil Engineering, or related field.
⏺1–5 years proven experience as a Site Supervisor in real estate or commercial building projects.
⏺Strong knowledge of construction processes, materials, and quality standards.
⏺Excellent leadership, communication, and problem-solving skills.
⏺Proficiency in MS Office and construction management tools is an advantage.
⏺Strong organizational skills with attention to detail.

📩How to apply
Interested? Send your application to
recruitment1@geezjobs.com

@etconp

🏷ምዝገባ ጨርሰናል🙏

💫ሁለተኛ ዙር የ "Quantity Surveying" Full Course በ ኦንላይን ለመማር የተመዘገባቹ በ ሙሉ ቅዳሜ ማታ አንድ ሰዓት ክላስ ይጀመራል ተዘጋጁ❤

📩ለበለጠ መረጃ  @Philemona7 ወይም 0925446661 ይደውሉ

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ጨረታ

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አዲስ ዘመን ነሐሴ 23 ቀን 2017 ዓ. ም ዕትም ላይ የተወሰደ

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ጨረታ

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አዲስ ዘመን ነሐሴ 22 ቀን 2017 ዓ. ም ዕትም ላይ የተወሰደ

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ጨረታ

አዲስ ዘመን ነሐሴ 22 ቀን 2017 ዓ. ም ዕትም ላይ የተወሰደ

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👉ጨረታ

⏺Building consultancy Service (የህንፃ ግንባታ ስራ ማማከር አገልግሎት) | Ethiopian Intellectual Property Authority

⏺Invitation Date  Aug 28, 2025

📜Procurement Reference No  EIPA-NCB-C-0004-2018-BID-Open

🚧Procurement Category :Consultancy Services
⏺Market Type:National
⏺Procurement Method:Open

📜Procurement Classification 

❇️Code Title 72110000  የመኖሪያ ሕንፃ ግንባታ አገልግሎቶች

⏺Procuring Entity Ethiopian Intellectual Property Authority,

📍Address
⏺Country: Ethiopia
⏺Town: Addis Ababa
⏺Street: kazanchis
⏺Room Number:2
📞Telephone: +251115500272
🎲Email: info@eipo.gov.et
📩Po Box: 25322/1000

Lot Information

⏺Object of Procurement  Building consultancy Service (የህንፃ ግንባታ ስራ ማማከር አገልግሎት)
Description  Building consultancy Service ** (የህንፃ ግንባታ ስራ ማማከር አገልግሎት)

- Lot Number  1
Clarification Request Deadline  Sep 7, 2025, 5:00:00 PM
Pre-Bid Conference Schedule  Not Applicable
Site Visit Schedule  Not Applicable
Bid Submission Deadline  Sep 12, 2025, 10:00:00 AM
Bid Opening Schedule  Sep 12, 2025, 10:30:00 AM
Bid Security Amount  50,000 ETB
Bid Security Form For SME  Letter from Small and Micro Enterprise, Bank Guarantee,
Bid Security Form For Foreign Bidders  Bank Guarantee,
Bid Security Form For Local Bidders  Bank Guarantee,
Notice

📜Terms and Conditions

⏺ጨረታውን በከፊልም ሆነ ሙሉ ለሙሉ የመሰረዝ መብቱ በህግ የተጠበቀ ነው

📍Application: Online on EGP

@etconp

👉የኢትዮጵያ ሲቪል መሐንዲሶች ማህበር እና ላሊበላ የጥናት ዲዛይንና ቁጥጥር ስራዎች ኃ/የተ/የግ/ማህበር 5ተኛውን የምህንድስና ጉባኤ በባህርዳር ከተማ ዛሬ ቅዳሜ ነሐሴ 24/ 2017 ያዘጋጃሉ።

💫በዚህ ጉባኤ መሐንዲሶች, በዘርፉ ልምድ እና እውቀት ያካበቱ ባለሙያዎች እና ባለድርሻ አካላት የሚሳተፉበት ይሆናል።

🚧The Ethiopian Association of Civil Engineers (EACE), and Lalibela Study Design & Supervision Works PLC, will host the 5th EACE Engineering

📜Conference under the theme: Transforming Construction: Innovation, Safety, and Sustainability

📍Location: Bahirdar, Ethiopia
🏷Date: August 30, 2025

⏺This premier event will bring together engineers, industry experts, and innovators to explore forward-thinking solutions that shape a safer, more sustainable construction industry.

@etconp

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