To reduce the weight of concrete or find alternative materials, several strategies can be applied:

1. Lightweight Aggregate Concrete: Replacing traditional aggregates with lightweight options, such as expanded clay, perlite, or pumice, significantly reduces concrete’s density and overall weight.

2. Foamed or Cellular Concrete: Introducing air bubbles into the concrete mixture through foaming agents creates cellular structures that reduce weight without sacrificing volume.

3. High-Performance Fiber-Reinforced Concrete (HPFRC): By incorporating fibers, HPFRC allows for thinner, lighter structures with enhanced durability and strength, potentially reducing the required concrete volume.

4. Geopolymer Concrete: Using materials like fly ash or ground granulated blast furnace slag as a binder rather than Portland cement not only provides an eco-friendly alternative but can also produce a lighter final product depending on the mix design.

5. Alternative Materials: Materials such as timber, cross-laminated timber (CLT), or advanced composites (like carbon or glass fiber-reinforced polymers) can serve as concrete alternatives in specific structural applications, offering both lower weight and sustainability benefits.

Please have a look within my project CC:

Conference Paper Project CC Production of filigree cavity ceiling panels with...

Article Project CC Modelling and quasistatic simulation of the stiff...

Conference Paper Project CC Investigations on the load-bearing properties of ...

• Recycled plastic
• Fly ash
• Green concrete
• Ground Granulated Blast-Furnace Slag (GGBS)

One of the most effective ways (methods) to reduce the weight of concrete is the seismic isolation. Developed by me technologies in Armenia for construction of new or retrofitting of existing base isolated buildings are bringing to reduction of the volume of concrete about 2 times.