₦airaland Forum

Sharp Sand used in building construction at a site

Filling Sand used for Road Construction

Filling Sand used for filling the foundation of a house

Filling Sand at the dredging site

Hello NairaLanders,

I couldn't post through out last week because the keyboard of my Laptop got spoilt.

Today, we are talking about the kinds of Sand you can dredge. There are two kinds of Sand that can be dredged from the coastal area:

1. Filling Sand: Though it looks like sharp sand but it is not as sharp as the Sharp sand and just as it's name, filling sand is majorly being used for filling building foundation (DPC), road construction or water log (swamp) environment
Fill sand is a blend of fine and little coarse particles. It is often used when cost-effectiveness is a primary concern.

Uses:
Filling voids and gaps
Temporary fills
Layer under slabs and pavement
Angular particles allow for excellent interlocking
Delivers superior load distribution
Reduces the chances of foundation shifting or cracking
Offers optimal drainage, minimizing hydrostatic pressure
Sharp Sand or Laterite: Which is Better for Filling Before Oversite Concrete?
When preparing your building site for over site concrete, the choice of fill material matters a lot!
Filling Sand drains water easily, reducing moisture problems under your slab. It compacts well, giving solid support to concrete. And also Less likely to shrink or settle over time.
While Laterite can hold water and become unstable if not properly compacted. It may expand or shrink with moisture changes, risking cracks in your slab. Though It is cheaper but not always the best for structural stability.

Recommendation: Filling sand is usually the better choice for filling before oversite concrete. It ensures proper drainage, good compaction, and long-term durability of your floor slab.

Build wisely for a solid foundation!

Filling Sand is availabile in many coastal regions, coupled with its affordable cost and performance reliability, makes it the preferred choice of civil engineers and contractors alike.

2. Sharp Sand: Sharp sand (also called coarse sand or grit sand) is a type of sand with small, rough, and angular particles, a coarse-grained aggregate with angular particles, primarily used in construction for high-strength applications like concrete, floor screeds, block paving, and mortar. It ensures strong, durable, and well-drained structures and is popular for laying paving, block molding, and improving soil drainage. It is widely used in construction because of its strength and excellent binding properties.

Common Uses of Sharp Sand:
Concrete production
Mixed with cement and gravel to make strong concrete
Block making (hollow blocks)
Gives strength and durability to blocks
Floor screeding
Used for leveling floors before tiling
Paving and laying slabs
Provides a firm base for interlocking stones
Drainage systems
Ideal for areas where water should pass through easily

08132820002

Hi Nairalanders,

I'm sorry I couldn't post yesterday as promised, it was due to tight schedules. Please let's continue with our training.
This training will be incompleted without starting from the basic even as much as many people would have known this

1. What is Dredging? (Detailed Basic Definition)
Dredging is the mechanical or hydraulic excavation, removal, transportation, and relocation of sediments such as sand, silt, clay, gravel, or debris from the bottom of water bodies like rivers, lagoons, lakes, and coastal areas.

It is carried out using specialized equipment called dredgers, with the aim of:
----- Deepening waterways
----- Extracting sand for construction
----- Reclaiming land
----- Maintaining navigation channels
----- Controlling flooding and erosion

Expanded Technical Definition
Dredging is a controlled engineering process that involves:
...... Loosening or cutting underwater materials
...... Lifting or pumping the material (sediment slurry)
...... Transporting the material through pipelines, barges, or trucks
...... Depositing it at designated locations (stockpile, reclamation site, or disposal area)

Key Components of Dredging
...... Sediment Source: Lagoon, riverbed, seabed
...... Dredging Equipment: Cutter, suction pump, Chinese dredger, excavator, drag arm
...... Transport System: Pipelines, barges, trucks
...... Discharge Area: Reclamation site or sand stockpile


Economic Importance (Especially in Nigeria)
In places like Lagos and Ogun:

a) Dredging supplies construction sand (sharp sand, filling sand)
b) Supports real estate development (Lekki, Ajah, Ibeju-Lekki, Epe)
c) Enables coastal reclamation projects
d) Generates high ROI business opportunities (20–35%)

2. Major Categories of Dredging
Dredging can be broadly divided into two main types:

A. Mechanical Dredging:
This involves physically digging and lifting material using mechanical equipment.

Characteristics:
Uses buckets, grabs, or excavators
Suitable for hard soil, clay, compacted sand
More precise but slower

Types of Mechanical Dredging:

1. Excavator Dredging
Uses an excavator mounted on a pontoon
Common in shallow waters (Ogun rivers, creek areas)

Advantages:
Low cost
Easy to mobilize
Good for small-scale operations

Disadvantages:
Low production rate
Limited depth reach

2. Grab (Clamshell) Dredging
Uses a crane with a grab bucket
Picks sediment vertically

Advantages:
High precision
Suitable for ports and confined areas

Disadvantages:
Slow
Not efficient for large commercial sand mining

3. Backhoe Dredging
Similar to excavator but more powerful
Used for hard materials and compact layers


B. Hydraulic Dredging:
This is the most important type for commercial sand dredging in Lagos.

It uses water pressure and suction pumps to move sediment as slurry.

Characteristics:
High production capacity
Continuous operation
Ideal for sand mining and large-scale projects

The Hydraulic kind of Dredging is what we are going to be discussing in the course of this practical training.

08132820002

erad:
And they don't pay for it?

You can not compare the cost of running production on electricity to running the same on diesel/petrol

Hi Nairalnders,

CHAPTER 1
INTRODUCTION, SCOPE & CURRENT MARKET SNAPSHOT

1.1 Purpose of the Training
This training is a practical guide for anyone who intends to start, run, invest in, or regulate mechanized sand-dredging operations in coastal Nigeria. Using Lagos State and Ogun State as primary case studies, the training explains technical methods, legal/regulatory processes, environmental safeguards, business models, and up-to-date financial realities required to plan and operate a compliant, profitable dredging enterprise.

Who this training is for:
Entrepreneurs
Investors
Engineers
Regulators
Community Leaders

1.2 Scope & Structure:
The training covers:
 Technical foundations (types of dredging equipment and their outputs)
 Regulatory & permitting steps in Nigeria (federal & state-level)
 Detailed Lagos & Ogun state case studies (site selection, permit history, community engagement)
 Practical operating models and bankable financial templates (Naira)
 Risk mitigation, environmental management

1.3 Research Methodology & Currency of Data
This training uses a blend of:
a) Official regulator websites (NIWA, Lagos state MWID, Federal environment/EIA frameworks)
b) Recent market price trackers and Nigerian industry sources for fuel, sand, equipment and service costs (2024–2025/Jan-2026 updates used where available)
c) Published contractor and surveyor service pages (local hydrographic survey companies and dredging firms)
d) News reports documenting regulatory enforcement and major projects (Lekki, Apapa port, Ojoo, Badagry, Ikorodu)
e) All monetary figures in the training are shown in Naira (₦).

08132820002

Happy Sunday to all prospective investors,
Starting from this week we shall learning about Sand Dredging As A Profitable Investment In Nigeria every Monday and Friday under the following topics and many more as questions come in during the course of the training:

SECTION 1 – FOUNDATIONS OF DREDGING
...... Introduction to Dredging Business in Nigeria
...... Types of Dredging: Manual, Mechanical & Industrial
...... Sand Types, Market Uses & Industry Demand
...... Dredging Equipment & Technology (From Pumps to Cutter Suction)

SECTION 2 – LEGAL, REGULATORY & ENVIRONMENTAL FRAMEWORK
...... Federal Regulations: NIWA, NESREA, EIA Act
...... Lagos State Dredging & Waterfront Laws
...... Ogun State Dredging & Environmental Regulation
...... Community Relations, MoUs & Conflict Prevention

SECTION 3 – LAGOS STATE AS A CASE STUDY
...... Overview of Dredging Economy in Lagos
...... Major Commercial Dredging Zones in Lagos
...... Lagos Permits, Costs & Approval Timeline
...... Enforcement, Shutdowns & Compliance Lessons
...... Sand Market Pricing & Buyers in Lagos
...... Lagos Haulage, Logistics & Port Access

SECTION 4 – OGUN STATE CASE STUDY
...... Overview of Dredging Economy in Ogun
...... Major Commercial Dredging Zones in Ogun
...... Ogun Permits, Costs & Approval Timeline
...... Community Engagement Strategy in Ogun
...... Sand Pricing, Buyers & Haulage in Ogun

SECTION 5 – FINANCIAL MODELS & PROFITABILITY
...... Startup Cost Breakdown (Small, Medium & Large Scale)
...... Daily, Monthly & Annual Revenue Projections
...... Operating Costs, Taxes & Royalties
...... Profit Margins & Break-Even Analysis
...... Investor Funding Models & Partnerships

SECTION 6 – OPERATIONS & RISK MANAGEMENT
...... Site Setup & Production Planning
...... Equipment Maintenance & Staff Management
...... Safety, Security & Insurance
...... Environmental Protection & Legal Risk Control
...... Common Failures in Nigerian Dredging Business
And many more

08132820002

Hi Prospective Investors,

Many people see trucks carrying sand daily across Nigerian cities and assume the sand dredging business is easy money. But the truth is that many people who enter the business lose money because they don’t understand how the industry works.

After spending years studying the sand supply and dredging sector, I discovered that success in this business depends on a few key factors most beginners ignore which I'm ready to discuss here.

Before I begin sharing what I know, let me ask the house a few questions:

1. Have you ever thought about investing in the sand dredging business?

2. What do you think is the biggest barrier to entering the business?
....... Capital
....... Government permits
....... Equipment
....... Market access

3. Do you think sand dredging is still profitable in Nigeria today?

Let’s discuss.

If there is enough interest, I will start a structured thread (Practical Training) explaining how the sand dredging business really works in Nigeria.

Flangelo12:
If a Barrel of Oil was sold at $100.

Would you sell it to your neighbour at $60 out of patriotism?

Why not? not neighbour here but citizens but because the government do not care for citizens that is why they prefer to sell to the other countries while their citizens ae suffering.
Meanwhile they will still not use the profit derive from the oil exportation to the benefit of their citizens