2i Constructions

2iConstructions extends its warmest wishes for a joyous and blessed Ramadan Kareem to all.

22 hours ago | [YT] | 4

2i Constructions

01. Classification of Storage Areas | Short vs Long-Term Preservation | Material Procurement Series

https://youtu.be/4yc29i5tPac

🔥 Material Procurement, Transportation, Receiving, Handling, Storage & Preservation Series
🎯 Advanced Quality & Engineering Series – Master the Procurement & Inspection Process
📌 Presented by 2i Constructions

The most awaited advanced-level lecture series from 2i Constructions is finally here!
This series delivers a complete, end-to-end understanding of material management and inspection in construction projects — from Material Take-Off (MTO) to final inspection, storage, and preservation.
Designed for professionals who want practical, field-oriented knowledge aligned with international best practices and mega-project requirements.
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⚠️ Disclaimer
All content shared on 2i Constructions platforms is provided solely for educational and training purposes. Always refer to project specifications, approved drawings, contract documents, and applicable standards before applying information to live projects.
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📌 What You’ll Learn
✅ End-to-End Material Process – From MTO to Final Inspection & Storage
✅ Procurement Workflow – Vendor Selection, TBE, Award Recommendation, PO & Follow-up
✅ Inspection Protocols – Inspectable vs Non-Inspectable Materials, Levels of Inspection
✅ Key Documentation – IAP, PIM, NMR-601/602/603, Form-175
✅ Transportation, Receiving, Handling, Storage & Preservation Best Practices
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📚 Lecture Breakdown
🔹 Lecture 01 – Fundamentals of Procurement & Inspection
• Manufacturer vs Vendor – Key Differences
• Inspectable vs Non-Inspectable Materials
• Levels of Inspection
• Procurement Stages – From Request to PO
• Essential Document Requirements

🔹 Lecture 02 – Guidelines & Responsibilities
✔ Reference Standards & Study Materials
✔ Key Definitions
✔ Step-by-Step Compliance Guidance
✔ Roles & Responsibilities

🔹 Lecture 03 – Deep Dive into Inspection
✔ Criteria for Inspectable / Non-Inspectable Materials
✔ Required Documents for Each Category
✔ Application of Inspection Levels

🔹 Lecture 04 – Procurement Flow & Inspection Protocols
✔ Procurement Flowchart (Visual Guide)
✔ Inspection Levels & Requirements
✔ How PIM, NMR-601/602/603 & IAP Work Together

🔹 Lecture 05 – Mastering Procurement & Final Release
✔ Best Practices Procurement Process
✔ Flowchart Walkthrough
✔ MR, NMR, Vendor Selection, PO, Inspection
✔ Inspection Reports & Final Material Release
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🔥 Bonus Topics – Industry Standards & Practices
🔸 Form-175 – When & How to Use
🔸 NMR 601 / 602 / 603 – Purpose & Execution
🔸 IAP (Inspection Assignment Package)
🔸 PIM (Pre-Inspection Meeting)
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🏗️ Storage & Handling Sub-Series
1️⃣ Classification of Storage Areas
2️⃣ Material Receiving Inspection
3️⃣ Transportation, Storage & Preservation
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👷 Who Should Watch
Procurement Engineers
QA/QC Engineers
Material Engineers
Site Engineers
Project Engineers
Construction Managers
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🔔 Subscribe & Hit the Bell Icon to stay updated with advanced construction learning.
💬 Comment below: Which topic are you most excited about?
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🤝 Join Channel Membership (Perks Access):
youtube.com/channel/UCC7SYLxdVCpvgghoTQ_havw/join
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#Construction #QualityControl #Engineering #Procurement #Inspection #MaterialManagement #2iConstructions #SaudiProjects

3 days ago | [YT] | 5

2i Constructions

#MOISTURE #TEST

The #moisture #test of concrete using a plastic sheet is a simple method to determine if moisture is still coming up from the concrete slab. Here’s how you can perform the test:

#Materials Needed:
- Clear plastic sheet (approximately 18 inches x 18 inches)
- Duct tape

#Steps:

1. Preparation: Clean a small area of the concrete surface to ensure it is free from debris, dust, and any coatings that might interfere with the test.

2. Placement: Lay the plastic sheet flat on the concrete surface. Ensure that the sheet is large enough to cover the area adequately.

3. Sealing: Securely tape all edges of the plastic sheet to the concrete with duct tape. Make sure the seal is airtight to prevent air and moisture from escaping.

4. Waiting Period: Leave the plastic sheet in place for at least 24 hours. In humid conditions, you might need to wait longer, up to 72 hours.
*16 hours as per SATR-H-1003*

5. Inspection:

- After the waiting period, carefully remove the plastic sheet and inspect the underside and the concrete surface:

- Moisture under the plastic: If you find moisture on the underside of the plastic or the concrete surface, it indicates that moisture is still present in the concrete.

- Dry surface: If both the plastic and the concrete surface are dry, it suggests that the concrete has sufficiently cured and dried.

This test is a quick and straightforward way to check for moisture in concrete, which is crucial before applying finishes or coatings.

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4 days ago | [YT] | 7

2i Constructions

Quality Control Checks for Concrete (General Standards)

1. General Requirements (All Concrete Types)
✅ Batch Ticket Verification:

Must include:

Plant name/location, mix design #, JO #, truck #, time of loading.

Cement/admixture type, water content, aggregate mass, drum revolutions.


Reject if: No operable revolution counter or missing data.


✅ Delivery & Discharge:

Max 90 minutes OR 300 drum revolutions after water/cement addition.

Reject if: Exceeds time/revolutions or temp > 35°C (non-structural exempt).


✅ Slump Test:

Must meet design specs (e.g., 110–190mm for structural).

Adjustments: Only water/WRA allowed (recorded, max manufacturer limit).


✅ Temperature:

16–35°C for structural; >35°C allowed for non-structural.
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2. Non-Structural/Lean Concrete
✔ Compressive Strength: ≥14 MPa (3/7/28-day cubes).
✔ W/C Ratio: ≤0.6 (lab-tested).
✔ Cement Content: ≥250 kg/m³.
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3. Structural (Type 2 Reinforced) Concrete
✔ Compressive Strength: ≥35 MPa (lab-tested cylinders).
✔ W/C Ratio: ≤0.4 (strict enforcement).
✔ Cement Content: 350–370 kg/m³.
✔ Aggregate Gradation: 10–20mm, tested for impurities.
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4. Lightweight/Foam Concrete
✔ Density: ≤640 kg/m³ (field verification).
✔ Strength: 9.7–13.1 MPa (1400–1900 psi).
✔ Mix Proportions:

Water: 270L/m³

Foam Agent: 0.85L/m³

Cement: 600kg/m³
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5. Screed Concrete
✔ Thickness & Aggregate:

Structural: 10mm (3/8”) or 5mm (3/16”) agg. per design.

Non-Structural: As per thickness specs.
✔ Surface Flatness: ≤3mm deviation (per 2m straightedge).
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Rejection Criteria (All Types)
❌ Missing/incomplete batch ticket.
❌ Improper mixing/discharge time (ASTM C94 Sec. 12).
❌ Failed slump/temp/strength tests.
❌ Visible segregation or contamination.

Standards:

ASTM C94 (Ready-Mix Concrete)

Local/Project-specific concrete specifications
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#QualityControl #Construction #ConcreteTesting

🔗 Stay Connected with 2iConstructions Academy!

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1 week ago | [YT] | 5

2i Constructions

🧱 Essential Guidelines for Vapor Barriers & Curing Practices in Concrete Construction

(ASTM-Based Best Practices)

To ensure long-term durability and structural performance, vapor barriers and proper curing are critical in concrete works. Below is a practical, standards-aligned breakdown commonly applied on high-quality construction projects.
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🔹 1. Vapor Barrier Requirements (Polythene / Plastic Sheet)

Use Class A plasticized vapor barriers complying with ASTM E1745

Minimum thickness: 0.25 mm (10 mils)

Install below slabs on grade (excluding outdoor sidewalks and pavements)

Provide vapor barriers below and around concrete cast directly against soil where:

Formwork is not used

Protective coatings cannot be applied

Place vapor barrier over a 50 mm lean concrete sub-slab under foundations

📌 Purpose: Prevent moisture migration, protect reinforcement, and improve slab performance.
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🔹 2. Concrete Surface Protection and Curing

Cover freshly placed concrete immediately with plastic sheeting to prevent rapid moisture loss

High wind, high temperature, or low humidity conditions can:

Accelerate evaporation

Cause plastic shrinkage cracks

Lead to incomplete cement hydration

Curing compounds shall comply with ASTM C309

Do NOT use curing compounds on surfaces that will receive:

Bonded screeds

Epoxy or resin coatings

Tiles or other bonded finishes

📌 Key Rule: Any surface requiring adhesion must remain free from curing membranes.
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🔹 3. Concrete Surface Dryness Test (ASTM D4263)

Plastic Sheet Test – Readiness for Coating

Procedure:
1️⃣ Tape a 4 mil thick (0.1 mm) clear plastic sheet
  Size: 18 in × 18 in (450 × 450 mm)
2️⃣ Seal all edges tightly using duct tape
3️⃣ Leave in place for minimum 16 hours
  (Duration: ____ hrs)
4️⃣ Remove the sheet and inspect the underside

Acceptance Criteria:

✅ No moisture visible → Concrete is suitable for coating

❌ Moisture droplets present → Extend curing/drying period before coating

📌 This test is widely used before applying protective coatings and flooring systems.
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📌 Pro Tip

Effective moisture control and vapor barrier integrity are non-negotiable on industrial and high-spec projects. Proper execution prevents:

Coating failures

Delamination

Surface blistering

Costly rework

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1 week ago | [YT] | 3

2i Constructions

74. Maximum allowable lift thickness in mass concrete placements is often limited to:

4 weeks ago | [YT] | 2

2i Constructions

73. . The purpose of a vapor barrier under a slab on grade is to:

4 weeks ago | [YT] | 1

2i Constructions

72. Which standard covers curing compounds for concrete?

4 weeks ago | [YT] | 1

2i Constructions

71.In mass concrete, temperature monitoring is usually done using:

4 weeks ago | [YT] | 1

2i Constructions

70. The primary concern in mass concrete is:

4 weeks ago | [YT] | 2