👉What is Slump Test and Why It Matters?

📌Definition: The Slump Test is a simple test used to measure the workability and consistency
of fresh concrete before placing it in formwork.

💫Purpose:

• To check the uniformity of concrete from batch to batch.

• To ensure proper water-cement ratio and desired workability.
Equipment Used:

• Slump cone (300mm high, 200mm bottom dia, 100mm top dia)

• Tamping rod (16mm dia, 600mm long)

• Base plate and measuring scale

📜Procedure:

1. Fill the cone with fresh concrete in 3 layers, each tamped 25 times.

2. Remove the cone vertically and measure the subsidence (slump) of concrete.

3. The difference in height gives the slump value (in mm).

⭐️Types of Slump:

• True Slump – Concrete subsides uniformly.
• Shear Slump – Concrete slides sideways (indicates poor cohesion).
• Collapse Slump – Concrete completely collapses (too wet mix).
Typical Slump Values:
• Mass Concrete: 25–50 mm
• Reinforced Foundation: 50–100 mm
• Slabs & Beams: 75–125 mm
• Pumped Concrete: 100–150 mm

💥Importance:

⏺The slump test ensures proper workability, reduces segregation risk, and confirms concrete quality before casting.

#SlumpTest #ConcreteTesting #WorkabilityTest #CivilEngineering #QualityControl
#ConstructionSite #FreshConcrete #SiteEngineer #ConcreteWork
#EngineeringKnowledge

@etconp

👉TESTS FOR SAND

💫1. Sieve Analysis Test

⏺Used to determine the particle size distribution of sand. Pass sand through sieves
(4.75 mm to 150 µm). Helps to classify as fine, medium, or coarse.

💫2. Silt Content Test

⏺Determines the percentage of silt or clay in sand.
⏺Mix 50 ml sand with 50 ml water in a cylinder, shake, and settle for 3–4 hours.
⏺Silt should not exceed 8%.

💫3. Bulking of Sand Test

⏺Checks the increase in sand volume due to moisture.
⏺Add small amount of water
and note the volume change. Normal bulking = 10–25%.

💫4. Specific Gravity Test

⏺Determines density ratio of sand compared to water. Ideal specific gravity = 2.6 –2.7.

💫5. Organic Impurities Test

⏺Checks for organic matter or clay.
⏺Mix sand with NaOH solution; brown color indicates impurities.

💫6. Moisture Content Test

⏺Finds the amount of water in sand.
⏺Dry the sample at 110°C and calculate moisture % using weight difference.

💫7. Fineness Modulus Test

⏺Indicates sand quality and gradation.
⏺FM = (Cumulative % retained on sieves) /100. Fine sand = 2.2–2.6, Coarse = 2.6–2.9.

🏷Good quality sand ensures strong and durable concrete.

#MaterialTesting
#SandTesting
#QualityControl
#LabTesting
#SoilAndSand
#BuildingMaterialsTest
#ConstructionTesting
#ConcreteQuality
#SiltContentTest
#SieveAnalysis

@etconp

👉Construction Sequence of a Building – Step by Step

1. Site Preparation: Clear vegetation, mark layout, and level site.

2. Excavation: Excavate to required depth for foundation.

3. Foundation: Place footing, concrete, and reinforcement as per design.

4. Plinth Beam: Cast plinth beam and fill up to floor level.

5. Superstructure: Construct columns, beams, and slabs (RCC work).

6. Brickwork: Build walls between columns for rooms and partitions.

7. Lintel & Roof: Cast lintel and roof slab; apply waterproofing.

8. Plastering: Apply internal and external plaster for smooth surface.

9. Flooring: Lay tiles, marble, or granite flooring.

10. Doors & Windows: Fix frames and shutters properly.

11. Electrical & Plumbing: Install wiring, piping, and fixtures.

12. Painting & Finishing: Paint walls, install fittings and polish surfaces.

13. Final Inspection: Quality check and handover to owner.

#CivilEngineering #BuildingConstruction #SiteWork #constructionsite #constructionsequence #Civil

https://t.me/ETCONpWORK

@etconp

👉WHAT ARE PURPOSE OF REINFORCEMENT RIBS?

🚧These ribs are intentionally formed during manufacturing to improve the bond between the steel reinforcement and the surrounding concrete.

💫Those are ribs (deformations) on the reinforcement bar, designed to enhance bond and prevent slippage in reinforced concrete.

#ConstructionInsights #ReinforcementBars #CivilEngineering #StructuralDesign #ConcreteTechnology #SiteKnowledge #BuildingConstruction #EngineeringEducation #ConstructionQAQC #RebarDetails #StructuralIntegrity #ConcreteBond #ConstructionMaterials

@etconp

👉የ Building Construction ኮሌጅ የመጀመሪያዎቹ ምሩቃን ህዳር 1952 ዓ.ም

💫የተያያዙት ምስሎች በአዲስ አበባ ህንፃ ኮሌጅ ምረቃ ላይ የተነሱ ናቸው።

⏺ዋና እንግዶች ንጉሠ ነገሥት ቀዳማዊ  ኃይለ ሥላሴ እና ልዑል በርትል ከስዊድን ነበሩ።

🏷በዚህ ቀን በህዳር 1952 ዓም (November 1959) የመጀመሪያ  ተማሪዎች ዲግሪያቸውን አግኝተዋል።

⏺ይህ ተቋም በ1954 እኤአ የተመሰረተው በኢትዮጵያ እና በስዊድን መንግስታት መካከል በተደረገው የሁለትዮሽ ስምምነት ነው።

⏺እ.ኤ.አ. በ 1955 የተጀመረው የመጀመሪያ የትምህርት መርሃ ግብር በህንፃ ኢንጂነሪንግ ውስጥ የሶስት ዓመት የዲፕሎማ መርሃ ግብር ለመስጠት ነበር።

⏺በ እ.ኤ.አ. 1957/58 የትምህርት ዘመን ማጠናቀቂያ ላይ ስልጠናው ወደ አራት አመት መርሃ ግብር በማደግ በ Bsc በ ህንፃ ምህንድስና ዲግሪ መስጠት ጀመረ።

https://www.flickr.com/photos/73738739@N03/albums/72157628794132559/

Via አብዱል አዚዝ

@etconp