Aparekka Projects

අද ඉදන් අපි අලුත් වැඩක් කරනව අපිට සෙට් වෙන රැකියා විස්තර ඔයාලත් එක්ක බෙදා හදා ගන්න. ඉතින් ඔයාගෙ දන්න අයටත් දැකගන්න බෙදාහරින්න.

Graphic Designer (Remote | Work From Home)

Cambridge Technology is looking for a creative and dedicated Graphic Designer to join our growing team.

Requirements include:
• Strong knowledge of Canva, Adobe Photoshop & Illustrator
• Video editing skills (Reels / short videos / basic motion)
• Social media poster design experience
• Good typography & color sense
• Ability to follow brand guidelines
• On-time delivery & revision handling

📍 Saudi Based Company
💼 Work Type: Remote
💰 Salary: Based on skills & experience

Interested candidates, please scan the QR code in the poster and submit your CV with:

✔ Portfolio link
✔ Tools you use
✔ Years of experience

📞 Contact: +966 53 786 2614

https://www.facebook.com/AparekkaEngineeringService

Aparekka Engineering & Technologies Building the Future, Safely & Reliably.

✶ 🎀 ᴍᴀʏ ᴛʜɪꜱ ʏᴇᴀʀ ʙʀɪɴɢ ɴᴇᴡ ʜᴀᴘᴘɪɴᴇꜱꜱ, ɴᴇᴡ ɢᴏᴀʟꜱ, ɴᴇᴡ ᴀᴄʜɪᴇᴠᴇᴍᴇɴᴛꜱ, ᴀɴᴅ ᴍᴀɴʏ ɴᴇᴡ ɪɴꜱᴘɪʀᴀᴛɪᴏɴꜱ ᴛᴏ ʏᴏᴜʀ ʟɪꜰᴇ. ᴡɪꜱʜɪɴɢ ʏᴏᴜ ᴀ ʏᴇᴀʀ ꜰᴜʟʟʏ ʟᴏᴀᴅᴇᴅ ᴡɪᴛʜ ʜᴀᴘᴘɪɴᴇꜱꜱ. ɪ ʜᴏᴘᴇ ᴛʜᴀᴛ ᴛʜɪꜱ ɴᴇᴡ ʏᴇᴀʀ ᴡɪʟʟ ʙᴇ ᴛʜᴇ ʙᴇꜱᴛ ʏᴇᴀʀ ᴏꜰ ʏᴏᴜʀ ʟɪꜰᴇ. ᴍᴀʏ ᴀʟʟ ʏᴏᴜʀ ʜᴏᴘᴇꜱ ᴀʀᴇ ꜰᴜʟꜰɪʟʟᴇᴅ ᴀɴᴅ ᴀʟʟ ʏᴏᴜʀ ᴅʀᴇᴀᴍꜱ ᴄᴏᴍᴇ ᴛʀᴜᴇ. 🎀 ✶
*Supun Aparekka* ❤️

Asphalt Road Layers Explained (From Bottom to Top)

An asphalt road is not just a single layer of asphalt. It is a multi-layer system, where each layer has a specific function. Proper layer construction ensures strength, durability, and long service life of the road.

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1️⃣ Subgrade

What it is: Natural soil prepared to support the road structure.

Purpose:

Acts as the foundation of the road

Transfers traffic loads to the ground

Key Points:

Must be well compacted

Weak subgrade = early road failure

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2️⃣ Sub-base Layer

What it is: A layer of granular material placed above the subgrade.

Purpose:

Improves load distribution

Provides drainage

Protects subgrade from moisture

Common Materials:

Crushed aggregate

Gravel

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3️⃣ Base Course

What it is: The main load-bearing layer of the pavement.

Purpose:

Takes most of the traffic load

Provides structural strength

Key Points:

Requires good compaction

Often treated with Prime Coat before asphalt layers

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4️⃣ Binder Course

What it is: An intermediate asphalt layer between base and surface.

Purpose:

Adds strength and stiffness

Distributes traffic stress evenly

Characteristics:

Larger aggregates

Higher thickness than wearing course

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5️⃣ Wearing Course (Surface Course)

What it is: The top visible asphalt layer.

Purpose:

Provides smooth riding surface

Skid resistance

Protects lower layers from water and traffic

Key Points:

Uses high-quality aggregates

Requires good finishing and compaction

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Simple Layer Order (Bottom → Top)

Subgrade → Sub-base → Base Course → Binder Course → Wearing Course

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Why Proper Layering Matters

Prevents premature failures (cracks, potholes)

Improves road life

Reduces maintenance cost

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Summary

A durable asphalt road depends on proper design, material selection, and construction of each layer. Ignoring any single layer can significantly reduce pavement performance.

Strong layers = Strong roads 🛣️

Which Bitumen Grade to Use?

Selecting the correct bitumen grade is critical for road durability, bonding, and long-term performance. This simple guide explains which grade to use, where, and why.

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1. If the Surface is a Granular Base (Before Asphalt)

Recommended Grade: 👉 MC (Medium Curing)

Why?

MC bitumen penetrates deeply into the granular base

Binds loose particles

Prepares a strong base for asphalt overlay

Common Choices:

MC-30 → Open / absorptive bases

MC-70 → Dense / well-compacted bases

Application: Prime Coat

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2. If the Surface is Existing Asphalt or Concrete

Recommended Grade: 👉 RC (Rapid Curing) or Bitumen Emulsion

Why?

Fast setting

Provides strong surface bonding

No deep pe*******on required

Common Choices:

RC-2 → Surface dressing & patch works

RC-3 → Heavy surface treatments

Application: Surface seal / Spray & chip / Tack coat

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3. If the Work Requires Mixing with Aggregates

Recommended Grade: 👉 SC (Slow Curing)

Why?

Slow evaporation allows proper mixing

Uniform coating of aggregates

Ideal for maintenance works

Common Choices:

SC-250 → Road maintenance

SC-800 → Cold mix applications

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4. Based on Weather & Time Constraints

Site Condition Best Choice

Need quick opening to traffic RC grades
Normal construction schedule MC grades
Long working / mixing time SC grades

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5. Common Mistakes to Avoid

❌ Using RC for prime coat (poor pe*******on) ❌ Using MC on asphalt surface (slow setting) ❌ Ignoring base condition & porosity

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6. Quick Decision Chart

Granular Base + Before Asphalt → MC

Existing Asphalt / Concrete → RC

Mixing / Maintenance Works → SC

Correct bitumen grade selection improves bond strength, water resistance, and pavement life. Always follow project specifications and engineer recommendations.

Right material + right place = long-lasting roads 🛣️

🔹 WHICH BITUMEN GRADE WHEN?

🟦 MC – Medium Curing
➡️ Use on Granular Base
➡️ Prime Coat
➡️ Deep pe*******on & strong bonding

🟥 RC – Rapid Curing
➡️ Use on Existing Asphalt / Concrete
➡️ Surface Sealing / Spray & Chip
➡️ Fast setting

🟩 SC – Slow Curing
➡️ Use for Mixing & Maintenance
➡️ Cold Mix Works
➡️ Long working time

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🔹 QUICK DECISION LINE

🛣️ Granular Base → MC
🛣️ Existing Asphalt → RC
🛠️ Mixing / Repairs → SC

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🔹 COMMON SITE MISTAKES (ICON STYLE)

❌ RC for Prime Coat
❌ MC on Asphalt Surface
❌ Wrong grade = Short road life

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🔹 FINAL MESSAGE

Right Bitumen + Right Application = Long Lasting Roads