Pozzolanic Silica Alumina (PSA)

PSA

Pozzolanic Silico‑Alumina (PSA) is a naturally occurring, high‑reactivity supplementary cementitious material (SCM) composed primarily of:

Amorphous silica (SiO₂)

Amorphous alumina (Al₂O₃)

Minor calcium, iron, and alkali oxides

Its pozzolanic activity enables PSA to partially or substantially replace Ordinary Portland Cement (OPC) in cementitious systems, reducing embodied carbon while improving long‑term performance characteristics.

PSA

Its pozzolanic activity enables PSA to partially or substantially replace Ordinary Portland Cement (OPC) in cementitious systems, reducing embodied carbon while improving long‑term performance characteristics.

PSA is classified as a high‑performance pozzolan, comparable to:

Class F fly ash

Metakaolin

Volcanic pozzolans

Ground granulated volcanic ash

Unlike industrial by‑products (fly ash, slag), PSA is geologically consistent, ensuring long‑term supply stability and predictable performance.

PSA

PSA used in Our Steel Frame System significantly improves:

Sulphate resistance

Chloride penetration resistance

Alkali‑silica reaction (ASR) mitigation

Freeze‑thaw performance

Permeability reduction

These characteristics make PSA suitable for structural applications.

Thermal Performance
PSA reduces heat of hydration, lowering thermal cracking risk in:

Walls

Floors

Roofs