To reduce the self-weight of concrete, lightweight aggregates can be used to replace traditional aggregates. These include:

1. Expanded Clay, Shale, or Slate: These are lightweight, porous materials produced by heating natural minerals, reducing the density of the concrete.

2. Pumice and Scoria: Natural volcanic rocks with low density, commonly used in lightweight concrete.

3. Polystyrene Beads or Foam Glass: Synthetic materials that provide a significant reduction in weight while maintaining reasonable strength.

4. Recycled Plastic or Rubber Aggregates: These reduce weight and contribute to sustainability by reusing waste materials.

5. Aerated or Cellular Concrete: Incorporates air voids, which act as a lightweight aggregate.

Using these alternatives can effectively decrease concrete weight, improving structural efficiency and reducing foundation loads.

I recommend "Poraver" expanded glass as an excellent replacement for traditional aggregates in concrete. Poraver is a lightweight, eco-friendly material that is produced by expanding glass in a controlled process. The unique properties of expanded glass, including its low bulk density, high thermal insulation, and durability, make it an ideal choice for reducing the self-weight of concrete.

By incorporating Poraver into the mix, the resulting concrete can achieve a significantly reduced density while maintaining good compressive strength, making it suitable for applications where weight reduction is critical. In fact, when properly mixed, Poraver-based concrete can even float, which is especially beneficial for applications such as floating structures, low-density building materials, and insulation.

Additionally, expanded glass is chemically inert, non-combustible, and offers good sound insulation, making it an all-around sustainable and versatile material for lightweight concrete solutions.

There are several materials that can replace traditional aggregates in concrete to reduce its self-weight while maintaining structural integrity and sustainability.

1.Expanded Polystyrene (EPS) Beads: Lightweight and can significantly reduce the weight of concrete.

2. Glass Beads Recycled glass can be used as an aggregate, reducing weight and promoting sustainability.

3. Paper Crete: Made from recycled paper, this material is lightweight and environmentally friendly.

4. Rubber Powder: Recycled from used tires, rubber powder can be used to create lightweight concrete.

5.Fly Ash: A byproduct of coal combustion, fly ash can partially replace traditional aggregates and reduce weight.

6. Expanded Shale: Lightweight and provides good insulation properties.

7.Expanded Clay: Another lightweight aggregate that can reduce the overall weight of concrete.

These materials not only help in reducing the weight of concrete but also contribute to sustainability by utilizing recycled or waste products.