Aggregates are imperative in every construction project. They are the foundation of contemporary infrastructure and are commonly used in residential, commercial and industrial developments. Different types of aggregates are chosen depending on the strength, particle size and application requirements of the project. Others are suitable for drainage, road building and filling work. Some aggregates are used for reinforced concrete.
Today, the construction industry uses natural, manufactured and recycled aggregates to improve structural performance and support sustainable building practices. Read along to identify the different aggregate types and sizes, their characteristics and their common usage in construction.
What are Aggregates?
Aggregates are granular materials such as sand, gravel, crushed stone, slag and recycled concrete. They are often combined with cement, lime or bitumen to make construction materials such as concrete and asphalt.
Used in roads, railways, drainage systems, foundations, pavements and reinforced concrete structures, aggregates help with the strength and stability of construction materials. They also reduce the overall cost of construction. Generally, aggregates are classified based on their source and types of aggregate size.
Different Types of Aggregate
Different types of aggregates are chosen depending upon their particle size, shape, density and construction application. There are three kinds of aggregates:
-
Manufactured aggregates
Manufactured aggregates are made by industrial processes or by crushing rocks to the desired sizes. These aggregates are formulated to serve particular construction purposes. These most commonly include crushed stone, slag and expanded clay aggregates.
Properties of Manufactured Aggregates
- Very strong and durable
- Available in controlled aggregate types and sizes
- Great for concrete and road construction
- Better load capability
- Can improve stability on reinforced structures
Uses of Manufactured Aggregates
Manufactured aggregates are used for:
- Concrete production
- Asphalt mixture
- Sub-base layers for roads
- Ballast (railroad)
- Drainage system
- Industrial and commercial construction projects
Crushed rock aggregates are preferred for reinforced concrete because their angular shape helps improve bonding strength.
-
Recycled aggregates
Recycled aggregate is an aggregate produced by reprocessing construction and demolition waste materials. These might include crushed concrete, reclaimed asphalt and reused construction debris. They are becoming more popular as they assist sustainable construction practices and reduce landfill waste.
Properties of Recycled Aggregates
- Environmentally friendly construction material
- Decreases construction waste
- Saves natural resources
- Cost effective for big projects
- For filling and road work
Uses of Recycled Aggregate
Recycled aggregates are often used in:
- Construction of road base and sub-base
- Backfill works
- Footpaths and walkways
- Use of drainage systems
- Concrete for non-structural purposes
Type 6F2 and crushed concrete aggregates are widely applied for piling mats, filling works and temporary access roads.
-
Natural Aggregates
Natural aggregates are extracted directly from natural deposits such as rivers, quarries and pits. These are some of the most common types of fine aggregate used in construction. Natural aggregates are mainly sand, gravel and natural crushed rock.
Properties of Natural Aggregates
- Readily available construction material
- Robust and reliable
- For concrete and mortar mixes
- Available in various aggregate sizes
- Offer excellent workability
Uses of Natural Aggregates
Natural aggregates are extensively used for:
- Reinforced cement concrete (RCC)
- Preparation of Mortars
- Rendering & Plastering
- Road building
- Drainage layers
- Structural & Foundation Work
Sand is a fine aggregate used in mortar and plastering applications, while gravel and crushed stone are coarse aggregates used for making concrete.
Uses of Aggregates
Aggregates are used in almost all construction projects because they provide stability and durability.
-
Concrete Making
Aggregates are an important component of concrete mixes. Both fine and coarse aggregates are used for enhancing the strength and reducing the shrinkage.
-
Road building
Roads require different sizes of aggregate for the sub-base, base layers and the asphalt surface. Aggregates distribute vehicle loads evenly.
-
Drainage System
The larger the particle sizes of the aggregates the more easy water can pass through. They are common in drainage trenches and filtration systems.
-
Construction of Railways
Railway ballast consists of strong coarse aggregates to give stability to the track and to reduce vibrations.
-
Foundation and Structural Work
Aggregates are used in RCC foundations, columns, slabs and beams as they increase the compressive strength.
-
Landscaping and Walkways
Natural gravels and decorative aggregates are commonly used in pathways, gardens and for outdoor paving applications.
Conclusion
At SuFin Limited, you can explore a wide range of high-quality types of aggregates suitable for different construction needs. The company provides dependable and various types of aggregates which meet the requirements of concrete work, road building and infrastructure development. The selected materials provide strength and durability which enables long-lasting performance.
Looking for reliable construction materials and industrial solutions for your next project? Our complete range of solutions from trusted suppliers provides you with opportunities to obtain special discounts and exclusive offers.
FAQs
1. Which type of aggregate is best for concrete?
Natural gravel and crushed stone are the best aggregates for concrete. They provide high strength, durability and bonding properties.
2. What is the classification of aggregates?
Aggregates are usually classified according to origin, size, shape and density. They are divided into three main types: natural, manufactured and recycled.
3. What is the size of aggregate used in RCC?
The most popular size of aggregate used in RCC is 20mm. However, the different aggregate sizes may be selected according to the structural requirement and type of construction project.