👉Colloidal silica is a suspension of fine silica (silicon dioxide) particles in a liquid, usually water.
@etconp 👇
@etconp 👇
❤3
Ethio Construction Engineering
👉Colloidal silica is a suspension of fine silica (silicon dioxide) particles in a liquid, usually water. @etconp 👇
👉Colloidal silica
⭐️Colloidal silica is a suspension of fine silica (silicon dioxide) particles in a liquid, usually water.
⏺Its history dates back to the mid-20th century, with the first patent granted in 1959.
🎲These nanoparticle silica sols exhibit unique properties due to their small size (typically 5 to 100 nanometers) and high surface area, making them valuable in many applications, including construction.
📜History and Chemical Composition
⏺Colloidal silica was first introduced as a technical material by Bryan H. Green in the United States in the late 1950s.
⏺It consists of amorphous, nonporous, typically spherical silica particles dispersed in water.
⏺The particles carry a negative surface charge, stabilized by pH adjustment or additives.
⏺The chemical composition is primarily silicon dioxide (SiO2), with some variations where silicon atoms may be partially replaced by aluminum to enhance stability.
⏺The particles are produced through polymerization of silica nuclei from silicate solutions under alkaline conditions.
📍Advantages of Colloidal Silica in Ethiopia
❇️Using colloidal silica in construction in Ethiopia offers several advantages:
• Enhanced strength and durability of concrete structures, important for infrastructure development.
• Pore water reduction, free alkali content reduction, reduction in permeability and improved resistance to environmental damage, which is valuable in Ethiopia’s varied climates.
• Faster curing times aiding accelerated project timelines.
• Potential economic benefits by reducing maintenance costs and improving lifespan of buildings and roads.
📍Resources in Ethiopia for Production
⏺Ethiopia has abundant natural resources suitable for producing colloidal silica.
▶️Notably, the Jema River region holds extensive silica sand reserves, which can be processed to produce high-quality silica materials.
🔰Establishing local production facilities could reduce reliance on imports, lower costs, create jobs, and support Ethiopia’s growing industrial and construction sectors.
⏺The availability of local silica sand combined with emerging processing technologies makes Ethiopia a promising location for colloidal silica manufacture.
In summary, colloidal silica is a nanoscale silica suspension with a proven ability to improve construction materials’ strength and durability.
⏺Ethiopia’s natural silica resources offer opportunities for local production, which could greatly benefit the construction industry and economic development.
⏺The integration of colloidal silica as an additive in Ethiopian construction projects can enhance infrastructure quality and longevity while fostering domestic industrial growth.
Via Yonatan Tadesse, PMP®
@etconp
⭐️Colloidal silica is a suspension of fine silica (silicon dioxide) particles in a liquid, usually water.
⏺Its history dates back to the mid-20th century, with the first patent granted in 1959.
🎲These nanoparticle silica sols exhibit unique properties due to their small size (typically 5 to 100 nanometers) and high surface area, making them valuable in many applications, including construction.
📜History and Chemical Composition
⏺Colloidal silica was first introduced as a technical material by Bryan H. Green in the United States in the late 1950s.
⏺It consists of amorphous, nonporous, typically spherical silica particles dispersed in water.
⏺The particles carry a negative surface charge, stabilized by pH adjustment or additives.
⏺The chemical composition is primarily silicon dioxide (SiO2), with some variations where silicon atoms may be partially replaced by aluminum to enhance stability.
⏺The particles are produced through polymerization of silica nuclei from silicate solutions under alkaline conditions.
📍Advantages of Colloidal Silica in Ethiopia
❇️Using colloidal silica in construction in Ethiopia offers several advantages:
• Enhanced strength and durability of concrete structures, important for infrastructure development.
• Pore water reduction, free alkali content reduction, reduction in permeability and improved resistance to environmental damage, which is valuable in Ethiopia’s varied climates.
• Faster curing times aiding accelerated project timelines.
• Potential economic benefits by reducing maintenance costs and improving lifespan of buildings and roads.
📍Resources in Ethiopia for Production
⏺Ethiopia has abundant natural resources suitable for producing colloidal silica.
▶️Notably, the Jema River region holds extensive silica sand reserves, which can be processed to produce high-quality silica materials.
🔰Establishing local production facilities could reduce reliance on imports, lower costs, create jobs, and support Ethiopia’s growing industrial and construction sectors.
⏺The availability of local silica sand combined with emerging processing technologies makes Ethiopia a promising location for colloidal silica manufacture.
In summary, colloidal silica is a nanoscale silica suspension with a proven ability to improve construction materials’ strength and durability.
⏺Ethiopia’s natural silica resources offer opportunities for local production, which could greatly benefit the construction industry and economic development.
⏺The integration of colloidal silica as an additive in Ethiopian construction projects can enhance infrastructure quality and longevity while fostering domestic industrial growth.
Via Yonatan Tadesse, PMP®
@etconp
❤9👍5
👉የአዲስ አበባ ዲዛይንና ግንባታ ስራዎች ቢሮ በዓዋጅ የተሰጡትን ተግባራት ዕውን ለማድረግ ያስችለው ዘንድ በ2018 በጀት ዓመት ከ10 የከተማ አስተዳደሩ ተቋማት ጋር ቅንጅታዊ ትስስር ስምምነት ሰነድ መፈራረሙን ተከትሎ በዛሬው ዕለት የመጀመሪያውን ሩብ ዓመት አፈፃፀም ገምግሟል፡፡
የተፈጠረው ቅንጅትም ቢሮው የመፈፀም አቅሙ እንዲያድግ ፤ አገልግሎት አሰጣጡን እንዲያሻሽል ፤ የመልካም አስተዳደር ጥያቄዎች አፋጣኝ መልስ እንዲያገኙ ፤ የህዝብ ሀብት ለተገቢው ዓላማ እንዲውል ፤ ከወሰን ማስከበር ጋር ተያይዘው የሚመጡ የፕሮጀክት መዘግየቶች እንዲቀሩ ፤ የመሰረተ ልማት ዝርጋታዎች እንዲሳለጡ ባጠቃላይ የሕብረተሰቡ ተጠቃሚነት እንዲረጋገጡና የተሻለ አፈፃፀም እንዲያስመዘግብ አስቻይ ሁኔታዎችን ፈጥሯል ተብሏል።
በጊዜ ማዕቀፉ ተቋማት በአዋጅ በተሰጠ ተግባር ላይ መሰረት አድርጎ ያለማቀድ ፤ በተቋም የሚሰሩ መደበኛ ስራዎችን ወደ ትስስር እቅድ ማምጣት ፤ በስምምነት የታቀዱ ተግባራትን መከታተልና ሪፖርት መላክ ላይ የሚታዩ ክፍተቶች በውስንነት የተገመገሙ ሲሆን በቀጣይ ሩብ አመት ከአሁኑ በተደረገው ቅንጅት መነሻነት የከተማዋን ፕሮጀክት አፈፃፀም ውጤታማነት ለማረጋገጥ እንደሚሰራ ተመኣክቷል።
Via አዲስ አበባ ዲዛይንና ግንባታ ስራዎች ቢሮ ኮሙኒኬሽን ጉዳዮች ዳይሬክቶሬት
@etconp
የተፈጠረው ቅንጅትም ቢሮው የመፈፀም አቅሙ እንዲያድግ ፤ አገልግሎት አሰጣጡን እንዲያሻሽል ፤ የመልካም አስተዳደር ጥያቄዎች አፋጣኝ መልስ እንዲያገኙ ፤ የህዝብ ሀብት ለተገቢው ዓላማ እንዲውል ፤ ከወሰን ማስከበር ጋር ተያይዘው የሚመጡ የፕሮጀክት መዘግየቶች እንዲቀሩ ፤ የመሰረተ ልማት ዝርጋታዎች እንዲሳለጡ ባጠቃላይ የሕብረተሰቡ ተጠቃሚነት እንዲረጋገጡና የተሻለ አፈፃፀም እንዲያስመዘግብ አስቻይ ሁኔታዎችን ፈጥሯል ተብሏል።
በጊዜ ማዕቀፉ ተቋማት በአዋጅ በተሰጠ ተግባር ላይ መሰረት አድርጎ ያለማቀድ ፤ በተቋም የሚሰሩ መደበኛ ስራዎችን ወደ ትስስር እቅድ ማምጣት ፤ በስምምነት የታቀዱ ተግባራትን መከታተልና ሪፖርት መላክ ላይ የሚታዩ ክፍተቶች በውስንነት የተገመገሙ ሲሆን በቀጣይ ሩብ አመት ከአሁኑ በተደረገው ቅንጅት መነሻነት የከተማዋን ፕሮጀክት አፈፃፀም ውጤታማነት ለማረጋገጥ እንደሚሰራ ተመኣክቷል።
Via አዲስ አበባ ዲዛይንና ግንባታ ስራዎች ቢሮ ኮሙኒኬሽን ጉዳዮች ዳይሬክቶሬት
@etconp
❤9
👉በመዲናዋ የተገነባው አዲስ ሲኒማ ኮምፕሌክስ ህንጻ ተመርቆ ለአገልግሎት ክፍት ሆነ
💫የአዲስ አበባ ከተማ ከንቲባ አዳነች አቤቤ በመዲናዋ የተገነባውን አዲስ ሲኒማ ኮምፕሌክስ ህንጻ በዛሬው ዕለት መርቀው ስራ አስጀምረዋል፡፡
ባለ 15 ወለል ህንጻ የሆነው አዲስ ሲኒማ ኮምፕሌክስ 592 ህፃናትን እና 887 አዋቂዎችን የመያዝ አቅም ያላቸው ሁለት የሲኒማ አዳራሾች እንዳሉት ከንቲባዋ ገልጸዋል፡፡
ባለ አራት ወለል የመኪና ማቆሚያ ያሉት ሲሆን፥ በቂ የድምፅ ማስተላለፊያ ስርዓት፣ ዘመናዊ የመብራት ስርጭት፣ የአየር መቆጣጠሪያ መሳሪያዎችን አካቷል ነው ያሉት።
የሲኒማ ኮምፕሌክስ ህንጻው ለቢሮዎች፣ ለስቱዲዮ፣ ለሥዕልና አርት ጋለሪ፣ ለቤተመፃሕፍት፣ ለካፍቴሪያ፣ ለሱፐርማኬት፣ ለምግብ ቤት፣ ለሱቆች፣ ለውበት ሳሎን፣ ለባንክ አገልግሎት፣ የትኬት መሸጫ ቢሮዎችና ለጉብኝት አገልግሎት የሚውሉ ክፍሎችንም አሟልቷል።
በተጨማሪም በቅጥር ግቢው የልጆች መጫወቻ የስፖርት ሜዳ፣ የመኪና ማቆሚያ እና አረንጓዴ ስፍራዎችን ጨምሮ ለማስታወቂያ የሚሆኑ ስክሪኖች ተገጥመውለታል፡፡
አዲስ ሲኒማ ኮምፕሌክስ ለኪነጥበብ ቤተሰቦችና ለከያኒያን ተጨማሪ ብስራት ነው ያሉት ከንቲባዋ፥ በዚህ ስራ ላይ ለተሳተፉ አካላት ምስጋና አቅርበዋል፡፡
Via FBC
@etconp
💫የአዲስ አበባ ከተማ ከንቲባ አዳነች አቤቤ በመዲናዋ የተገነባውን አዲስ ሲኒማ ኮምፕሌክስ ህንጻ በዛሬው ዕለት መርቀው ስራ አስጀምረዋል፡፡
ባለ 15 ወለል ህንጻ የሆነው አዲስ ሲኒማ ኮምፕሌክስ 592 ህፃናትን እና 887 አዋቂዎችን የመያዝ አቅም ያላቸው ሁለት የሲኒማ አዳራሾች እንዳሉት ከንቲባዋ ገልጸዋል፡፡
ባለ አራት ወለል የመኪና ማቆሚያ ያሉት ሲሆን፥ በቂ የድምፅ ማስተላለፊያ ስርዓት፣ ዘመናዊ የመብራት ስርጭት፣ የአየር መቆጣጠሪያ መሳሪያዎችን አካቷል ነው ያሉት።
የሲኒማ ኮምፕሌክስ ህንጻው ለቢሮዎች፣ ለስቱዲዮ፣ ለሥዕልና አርት ጋለሪ፣ ለቤተመፃሕፍት፣ ለካፍቴሪያ፣ ለሱፐርማኬት፣ ለምግብ ቤት፣ ለሱቆች፣ ለውበት ሳሎን፣ ለባንክ አገልግሎት፣ የትኬት መሸጫ ቢሮዎችና ለጉብኝት አገልግሎት የሚውሉ ክፍሎችንም አሟልቷል።
በተጨማሪም በቅጥር ግቢው የልጆች መጫወቻ የስፖርት ሜዳ፣ የመኪና ማቆሚያ እና አረንጓዴ ስፍራዎችን ጨምሮ ለማስታወቂያ የሚሆኑ ስክሪኖች ተገጥመውለታል፡፡
አዲስ ሲኒማ ኮምፕሌክስ ለኪነጥበብ ቤተሰቦችና ለከያኒያን ተጨማሪ ብስራት ነው ያሉት ከንቲባዋ፥ በዚህ ስራ ላይ ለተሳተፉ አካላት ምስጋና አቅርበዋል፡፡
Via FBC
@etconp
👍6❤5👏1
👉ደብረ ብርሃን ዩኒቨርሲቲ በ3 ቢሊዮን ብር የመምህራን መኖሪያ አፓርታማ እየሰራ መሆኑን አስታወቀ
⭐️የዩኒቨርሲቲው ፕሬዚዳንት አስማረ መለሰ (ዶ/ር) እንደገለጹት በዩኒቨርሲቲው 230 መምህርንን ተጠቃሚ የሚያደርግ አፓርታማ በ3 ቢሊዮን ብር ወጪ እየተገነባ መሆኑን አስታውቀዋል፡፡
🏷ግንባታው የመዝናኛና የገበያ ማዕከላትን ጨምሮ ሁለገብ አገልግሎት የሚሰጥ መሆኑ ተገልጿል፡፡
🚧የግንባታውን ሂደት በማፋጠን በአጭር ጊዜ ውስጥ ለማጠናቀቅ እየተሰራ መሆኑም ተጠቁሟል፡፡
@etconp
⭐️የዩኒቨርሲቲው ፕሬዚዳንት አስማረ መለሰ (ዶ/ር) እንደገለጹት በዩኒቨርሲቲው 230 መምህርንን ተጠቃሚ የሚያደርግ አፓርታማ በ3 ቢሊዮን ብር ወጪ እየተገነባ መሆኑን አስታውቀዋል፡፡
🏷ግንባታው የመዝናኛና የገበያ ማዕከላትን ጨምሮ ሁለገብ አገልግሎት የሚሰጥ መሆኑ ተገልጿል፡፡
🚧የግንባታውን ሂደት በማፋጠን በአጭር ጊዜ ውስጥ ለማጠናቀቅ እየተሰራ መሆኑም ተጠቁሟል፡፡
@etconp
❤11
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።
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📱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
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
❤3
👉Types of Culverts
🚧1.Pipe Culvert
⏺Circular, Elliptical, or Pipe Arch shape. Made of concrete, steel, or PVC. Used for small streams or drainage under roads.
⏺Easy to install and cost-effective.
🚧2.Box Culvert
⏺Rectangular or square in shape, made of RCC.
⏺Used for large discharges and urban drainage.
⏺Can carry road traffic directly above.
🚧3.Arch Culvert
⏺Arch-shaped structure made of stone masonry, brick, or RCC.
⏺Used for moderate flow and offers aesthetic appeal.
🚧4.Slab Culvert
⏺RCC slab over masonry or concrete abutments.
⏺Used for small spans (up to 3 m).
⏺Simple and economical for short crossings.
🚧5.Bridge Culvert
⏺Combination of bridge and culvert structure.
⏺Used for large spans and heavy flow areas.
⏺Acts both as a bridge and a culvert.
🚧6.Pipe Arch Culvert
⏺Arch-like pipe with a wide bottom, used when headroom is limited but wide flow is needed.
⏺Better hydraulic efficiency than circular pipes.
🚧7.Scupper Culvert
⏺Used to drain water from bridge decks or roads.
⏺Usually small openings along bridge sides.
#CulvertDesign #CivilEngineering #BridgeConstruction #RoadDrainage #PipeCulvert #BoxCulvert #ArchCulvert #SlabCulvert #BridgeCulvert #ConstructionTechnology #HydraulicStructure #WaterFlowControl #InfrastructureDesign #EngineeringStudy #sitework #civil #civilservice #civilrights #civilengineering
@etconp
🚧1.Pipe Culvert
⏺Circular, Elliptical, or Pipe Arch shape. Made of concrete, steel, or PVC. Used for small streams or drainage under roads.
⏺Easy to install and cost-effective.
🚧2.Box Culvert
⏺Rectangular or square in shape, made of RCC.
⏺Used for large discharges and urban drainage.
⏺Can carry road traffic directly above.
🚧3.Arch Culvert
⏺Arch-shaped structure made of stone masonry, brick, or RCC.
⏺Used for moderate flow and offers aesthetic appeal.
🚧4.Slab Culvert
⏺RCC slab over masonry or concrete abutments.
⏺Used for small spans (up to 3 m).
⏺Simple and economical for short crossings.
🚧5.Bridge Culvert
⏺Combination of bridge and culvert structure.
⏺Used for large spans and heavy flow areas.
⏺Acts both as a bridge and a culvert.
🚧6.Pipe Arch Culvert
⏺Arch-like pipe with a wide bottom, used when headroom is limited but wide flow is needed.
⏺Better hydraulic efficiency than circular pipes.
🚧7.Scupper Culvert
⏺Used to drain water from bridge decks or roads.
⏺Usually small openings along bridge sides.
#CulvertDesign #CivilEngineering #BridgeConstruction #RoadDrainage #PipeCulvert #BoxCulvert #ArchCulvert #SlabCulvert #BridgeCulvert #ConstructionTechnology #HydraulicStructure #WaterFlowControl #InfrastructureDesign #EngineeringStudy #sitework #civil #civilservice #civilrights #civilengineering
@etconp
❤10👍1
👉Book Highlight: “Principles of Measurement (International) For Works of Construction, June 1979”
Even though it was written at 1979 this book sets standardized principles for measuring construction works globally. It remains highly relevant today for engineers, quantity surveyors, and project managers. Key uses include consistent quantity measurement, transparent contract administration, accurate bill of quantities (BOQ) preparation, and supporting international project collaboration.
Key Principles of Measurement from the Book:
📖 Clear Definition of Measurement Units: The book defines standard units for measurement to avoid ambiguity, ensuring all parties understand the quantities involved.
📖 Uniform Measurement Methods: It prescribes consistent rules on how to measure different works such as earthworks, concrete, finishes, and services.
📖 Inclusion and Exclusion Rules: The book clearly states what should be included or excluded in measurements to prevent disputes, such as whether wastes, overlaps, or deductions apply.
📖 Basis for Contract Payment: The measured quantities form the basis for contractor payments, making accuracy critical for fair financial transactions.
📖 International Applicability: Standards enable smoother communication and comparison in multinational construction projects.
🏢 By following these principles, construction projects achieve improved accuracy, fairness, and efficiency from tendering through to final account settlement.
We have attached the pdf of this resource for you.
Via Yonatan Tadesse, PMP®
@etconp
Even though it was written at 1979 this book sets standardized principles for measuring construction works globally. It remains highly relevant today for engineers, quantity surveyors, and project managers. Key uses include consistent quantity measurement, transparent contract administration, accurate bill of quantities (BOQ) preparation, and supporting international project collaboration.
Key Principles of Measurement from the Book:
📖 Clear Definition of Measurement Units: The book defines standard units for measurement to avoid ambiguity, ensuring all parties understand the quantities involved.
📖 Uniform Measurement Methods: It prescribes consistent rules on how to measure different works such as earthworks, concrete, finishes, and services.
📖 Inclusion and Exclusion Rules: The book clearly states what should be included or excluded in measurements to prevent disputes, such as whether wastes, overlaps, or deductions apply.
📖 Basis for Contract Payment: The measured quantities form the basis for contractor payments, making accuracy critical for fair financial transactions.
📖 International Applicability: Standards enable smoother communication and comparison in multinational construction projects.
🏢 By following these principles, construction projects achieve improved accuracy, fairness, and efficiency from tendering through to final account settlement.
Via Yonatan Tadesse, PMP®
@etconp
❤5👍5🙏2
Ethio Construction Engineering
👉Book Highlight: “Principles of Measurement (International) For Works of Construction, June 1979” Even though it was written at 1979 this book sets standardized principles for measuring construction works globally. It remains highly relevant today for engineers…
POMI_1760377664.pdf
56.9 KB
1👍7🙏6
👉Fresh concrete cracking Few Hours after casting is a common issue, typically caused by plastic shrinkage, early drying, or improper curing. Here’s a breakdown of why it happens and the solutions to prevent it:
🔍 Reasons Why Concrete Cracks After Few Hours
🏷Plastic Shrinkage Cracks
⏺Occurs when water evaporates too quickly from the surface.
⏺Common in hot, dry, or windy conditions.
⏺The surface dries faster than the inner concrete, causing shrinkage and cracking.
🏷Rapid Drying / Lack of Curing
⏺Without proper curing, moisture evaporates too fast.
Causes the concrete to shrink and crack prematurely.
🏷Excessive Water in Mix (High Water-Cement Ratio)
⏺More water = more bleeding (water rises to the surface).
⏺Leads to weak surface and higher shrinkage, which causes cracks as it dries.
🏷Settlement Cracks
⏺If concrete settles unevenly due to:Inadequate compaction.
Obstructions (like rebar) preventing uniform settlement.
🏷Temperature Effects
⏺High ambient temperatures accelerate water loss and hydration.
⏺Early thermal stresses can cause cracking before concrete gains strength.
💫Solutions to Prevent Cracking
🔰Proper Curing (Start Early!)
Begin curing as soon as surface hardens (within a few hours).
🔰Use: Wet hessian/jute cloths
Water spraying
⏺Curing compounds
Plastic sheeting
❇️Control the Environment
Avoid casting in: Very hot,Windy,Dry weather
⏺Use sunshades, windbreaks, or misting to reduce evaporation.
🔰Adjust Mix Design
⏺Use a low water-cement ratio.
⏺Add admixtures like water reducers or retarders to improve workability without excess water.
⏺Use Evaporation Retardants
Spray these over concrete right after screeding to slow moisture loss.
⏺Apply Control Joints
Cut joints within 6–12 hours (or as specified) to allow controlled cracking.
⏺Proper Compaction and Finishing
⏺Ensure vibration and finishing are done correctly to avoid air pockets and segregation.
@etconp
🔍 Reasons Why Concrete Cracks After Few Hours
🏷Plastic Shrinkage Cracks
⏺Occurs when water evaporates too quickly from the surface.
⏺Common in hot, dry, or windy conditions.
⏺The surface dries faster than the inner concrete, causing shrinkage and cracking.
🏷Rapid Drying / Lack of Curing
⏺Without proper curing, moisture evaporates too fast.
Causes the concrete to shrink and crack prematurely.
🏷Excessive Water in Mix (High Water-Cement Ratio)
⏺More water = more bleeding (water rises to the surface).
⏺Leads to weak surface and higher shrinkage, which causes cracks as it dries.
🏷Settlement Cracks
⏺If concrete settles unevenly due to:Inadequate compaction.
Obstructions (like rebar) preventing uniform settlement.
🏷Temperature Effects
⏺High ambient temperatures accelerate water loss and hydration.
⏺Early thermal stresses can cause cracking before concrete gains strength.
💫Solutions to Prevent Cracking
🔰Proper Curing (Start Early!)
Begin curing as soon as surface hardens (within a few hours).
🔰Use: Wet hessian/jute cloths
Water spraying
⏺Curing compounds
Plastic sheeting
❇️Control the Environment
Avoid casting in: Very hot,Windy,Dry weather
⏺Use sunshades, windbreaks, or misting to reduce evaporation.
🔰Adjust Mix Design
⏺Use a low water-cement ratio.
⏺Add admixtures like water reducers or retarders to improve workability without excess water.
⏺Use Evaporation Retardants
Spray these over concrete right after screeding to slow moisture loss.
⏺Apply Control Joints
Cut joints within 6–12 hours (or as specified) to allow controlled cracking.
⏺Proper Compaction and Finishing
⏺Ensure vibration and finishing are done correctly to avoid air pockets and segregation.
@etconp
❤18
👉Types of cracks in concrete
💫1. Plastic shrinkage cracks
⏺Appearance: Narrow, shallow, usually parallel surface cracks that appear within hours of placing concrete.
⏺Cause: Rapid moisture loss from fresh concrete (wind, heat, low humidity).
⏺Severity/repair: Mostly cosmetic if shallow — broom finish, lite patching, or surface sealant. Prevent with curing and wind breaks.
💫2. Drying (shrinkage) cracks
⏺Appearance: Random fine to moderate cracks across the slab; often develop within days/weeks.
⏺Cause: Volume reduction as concrete dries and cures (internal restraint increases tensile stress).
⏺Severity/repair: Usually non-structural if narrow (<0.3–0.5 mm). Wider cracks may need routing & sealing or epoxy. Control with joints and proper mix/water content.
💫3. Settlement (subsidence) cracks
⏺Appearance: Wider cracks, often at one edge of a slab or wall; may be diagonal or stepped.
⏺Cause: Uneven support/soil settlement under the concrete.
⏺Severity/repair: Can be structural — investigate soil/support. Repair ranges from filling/sealing to underpinning or replacement.
💫4. Thermal cracks
⏺Appearance: Cracks due to temperature gradients — can be random or follow plane of temperature differential.
⏺Cause: Expansion/contraction from temperature changes, especially with poor jointing.
⏺Severity/repair: Often controlled with joints; repair with sealants or overlays if non-structural.
💫5. Structural (overload) cracks — flexural & shear
Appearance:
⏺Flexural: Vertical cracks at mid-span of beams/slabs, perpendicular to tensile stress.
⏺Shear: Diagonal cracks near supports.
⏺Cause: Loads exceeding design capacity or reinforcement failure.
⏺Severity/repair: Potentially serious — require structural assessment.
⏺Repairs: strengthening (carbon fiber, steel plates), additional reinforcement, epoxy injection for non-moving cracks, or member replacement.
💫6. Map or pattern cracking (crazing)
⏺Appearance: Very fine, shallow network of surface cracks (looks like crazing or a map).
⏺Cause: Rapid drying of surface or improper finishing (too much water on surface).
⏺Severity/repair: Mostly cosmetic — surface treatments, overlays, or sealers. Prevent with proper finishing and curing.
💫7. Alkali–Silica Reaction (ASR) / reactive aggregate cracking
⏺Appearance: Random map-like cracking, often accompanied by a gel exudate and expansion.
⏺Cause: Chemical reaction between alkalis in cement and reactive silica in aggregates + moisture.
⏺Severity/repair: Can be progressive and structural. Mitigation requires diagnosis; repair options limited — control moisture, use inhibitors, or replace affected concrete.
💫8. Corrosion-induced cracking
⏺Appearance: Cracking and spalling from reinforcement locations; rust stains common.
⏺Cause: Corrosion of steel rebar expands and cracks surrounding concrete.
⏺Severity/repair: Serious — needs exposure and repair of corroded steel, corrosion protection, patching, or replacement.
💫9. Freeze–thaw damage cracks
⏺Appearance: Rough, scaling, and small cracks over time; surface delamination.
⏺Cause: Freeze–thaw cycles in saturated concrete without proper air entrainment.
⏺Severity/repair: Prevent with air entrainment and proper air-void system; repair by resurfacing or replacing damaged areas.
💫10. Construction / cold-joint cracks
⏺Appearance: Crack at plane where fresh concrete was placed against hardened concrete — often vertical/linear.
⏺Cause: Lack of bond due to delays in placement.
Severity/repair: Can be non-structural or allow water ingress. Repair by cleaning and sealing, grout injection, or dowel installation.
💫11. Curling / warping cracks
Appearance: Cracking at slab corners/edges; slabs lift or curl at edges causing diagonal cracks.
@etconp
💫1. Plastic shrinkage cracks
⏺Appearance: Narrow, shallow, usually parallel surface cracks that appear within hours of placing concrete.
⏺Cause: Rapid moisture loss from fresh concrete (wind, heat, low humidity).
⏺Severity/repair: Mostly cosmetic if shallow — broom finish, lite patching, or surface sealant. Prevent with curing and wind breaks.
💫2. Drying (shrinkage) cracks
⏺Appearance: Random fine to moderate cracks across the slab; often develop within days/weeks.
⏺Cause: Volume reduction as concrete dries and cures (internal restraint increases tensile stress).
⏺Severity/repair: Usually non-structural if narrow (<0.3–0.5 mm). Wider cracks may need routing & sealing or epoxy. Control with joints and proper mix/water content.
💫3. Settlement (subsidence) cracks
⏺Appearance: Wider cracks, often at one edge of a slab or wall; may be diagonal or stepped.
⏺Cause: Uneven support/soil settlement under the concrete.
⏺Severity/repair: Can be structural — investigate soil/support. Repair ranges from filling/sealing to underpinning or replacement.
💫4. Thermal cracks
⏺Appearance: Cracks due to temperature gradients — can be random or follow plane of temperature differential.
⏺Cause: Expansion/contraction from temperature changes, especially with poor jointing.
⏺Severity/repair: Often controlled with joints; repair with sealants or overlays if non-structural.
💫5. Structural (overload) cracks — flexural & shear
Appearance:
⏺Flexural: Vertical cracks at mid-span of beams/slabs, perpendicular to tensile stress.
⏺Shear: Diagonal cracks near supports.
⏺Cause: Loads exceeding design capacity or reinforcement failure.
⏺Severity/repair: Potentially serious — require structural assessment.
⏺Repairs: strengthening (carbon fiber, steel plates), additional reinforcement, epoxy injection for non-moving cracks, or member replacement.
💫6. Map or pattern cracking (crazing)
⏺Appearance: Very fine, shallow network of surface cracks (looks like crazing or a map).
⏺Cause: Rapid drying of surface or improper finishing (too much water on surface).
⏺Severity/repair: Mostly cosmetic — surface treatments, overlays, or sealers. Prevent with proper finishing and curing.
💫7. Alkali–Silica Reaction (ASR) / reactive aggregate cracking
⏺Appearance: Random map-like cracking, often accompanied by a gel exudate and expansion.
⏺Cause: Chemical reaction between alkalis in cement and reactive silica in aggregates + moisture.
⏺Severity/repair: Can be progressive and structural. Mitigation requires diagnosis; repair options limited — control moisture, use inhibitors, or replace affected concrete.
💫8. Corrosion-induced cracking
⏺Appearance: Cracking and spalling from reinforcement locations; rust stains common.
⏺Cause: Corrosion of steel rebar expands and cracks surrounding concrete.
⏺Severity/repair: Serious — needs exposure and repair of corroded steel, corrosion protection, patching, or replacement.
💫9. Freeze–thaw damage cracks
⏺Appearance: Rough, scaling, and small cracks over time; surface delamination.
⏺Cause: Freeze–thaw cycles in saturated concrete without proper air entrainment.
⏺Severity/repair: Prevent with air entrainment and proper air-void system; repair by resurfacing or replacing damaged areas.
💫10. Construction / cold-joint cracks
⏺Appearance: Crack at plane where fresh concrete was placed against hardened concrete — often vertical/linear.
⏺Cause: Lack of bond due to delays in placement.
Severity/repair: Can be non-structural or allow water ingress. Repair by cleaning and sealing, grout injection, or dowel installation.
💫11. Curling / warping cracks
Appearance: Cracking at slab corners/edges; slabs lift or curl at edges causing diagonal cracks.
@etconp
❤14👍1
👉What is Asphalt Road Construction?
💫Asphalt road construction involves the use of asphalt, a mixture of aggregates, binder, and filler, to build and maintain roads, highways, and other pavement surfaces.
🚧The components of asphalt include aggregates, binder, and filler.
⏺Aggregates are the inert materials that provide strength and bulk to the asphalt mixture. Common aggregates used include crushed rock, sand, gravel, or slags.
⏺The binder is the adhesive substance that holds the aggregates together, with bitumen being the most common binder used.
⏺Fillers are fine materials that fill the gaps between the aggregates and binder, such as limestone dust, cement, or hydrated lime.
🏷The asphalt mixture is created by combining the aggregates, binder, and filler in specific proportions.
⏺The mixture is then heated to a high temperature (around 300°F) to facilitate mixing and application.
❇️The asphalt road construction process typically involves several steps.
⏺First, the site is prepared by clearing the area, removing debris, and grading the surface. Next, a layer of compacted aggregate material is laid down to provide a stable base.
⏺The heated asphalt mixture is then applied to the base course using a paver or spreader.
🔰After the asphalt mixture is applied, it is compacted using rollers or compactors to achieve the desired density and smoothness.
🚧Finally, the surface is finished with a layer of asphalt emulsion or sealcoat to protect it from the elements.
⏺Asphalt road construction is used for a wide range of applications, including highways and roads, parking areas, railway tracks, ports and airport runways, bicycle lanes and sidewalks, and playgrounds and sports areas.
⏺Asphalt is a popular choice for road construction due to its durability, flexibility, and resistance to heavy traffic and harsh weather conditions.
@etconp
💫Asphalt road construction involves the use of asphalt, a mixture of aggregates, binder, and filler, to build and maintain roads, highways, and other pavement surfaces.
🚧The components of asphalt include aggregates, binder, and filler.
⏺Aggregates are the inert materials that provide strength and bulk to the asphalt mixture. Common aggregates used include crushed rock, sand, gravel, or slags.
⏺The binder is the adhesive substance that holds the aggregates together, with bitumen being the most common binder used.
⏺Fillers are fine materials that fill the gaps between the aggregates and binder, such as limestone dust, cement, or hydrated lime.
🏷The asphalt mixture is created by combining the aggregates, binder, and filler in specific proportions.
⏺The mixture is then heated to a high temperature (around 300°F) to facilitate mixing and application.
❇️The asphalt road construction process typically involves several steps.
⏺First, the site is prepared by clearing the area, removing debris, and grading the surface. Next, a layer of compacted aggregate material is laid down to provide a stable base.
⏺The heated asphalt mixture is then applied to the base course using a paver or spreader.
🔰After the asphalt mixture is applied, it is compacted using rollers or compactors to achieve the desired density and smoothness.
🚧Finally, the surface is finished with a layer of asphalt emulsion or sealcoat to protect it from the elements.
⏺Asphalt road construction is used for a wide range of applications, including highways and roads, parking areas, railway tracks, ports and airport runways, bicycle lanes and sidewalks, and playgrounds and sports areas.
⏺Asphalt is a popular choice for road construction due to its durability, flexibility, and resistance to heavy traffic and harsh weather conditions.
@etconp
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ADVERTISMENT
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✅የምንሰጣቸው አገልግሎቶች
🔅 ፕሌት any Size & thickness
🔅 ጄ ቦልት (ጥርስ ማዉጣትና ማጠፍ)
🔅 የተለያዩ [modefic] ስራዎችን እንሰራለን።
♦️ ማንኛዉንም ብረታ ብረት እንገዛለን።
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📱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
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
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👉Brazil is revolutionizing green infrastructure by turning sugarcane bagasse—the fibrous waste from juice extraction—into a key ingredient for tougher, longer-lasting, and eco-friendly roads.
🚧Mixed into asphalt and concrete, this residue reduces cracks, boosts flexibility, and enhances resistance to extreme weather, addressing a former disposal challenge.
🏷This innovation benefits the environment, economy, and sustainable construction, positioning Brazil as a leader as the world takes note.
⏺This showcases how waste can pave a sustainable future, though broader adoption and long-term performance data are still needed to fully validate its impact.
@etconp
🚧Mixed into asphalt and concrete, this residue reduces cracks, boosts flexibility, and enhances resistance to extreme weather, addressing a former disposal challenge.
🏷This innovation benefits the environment, economy, and sustainable construction, positioning Brazil as a leader as the world takes note.
⏺This showcases how waste can pave a sustainable future, though broader adoption and long-term performance data are still needed to fully validate its impact.
@etconp
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