Sintered fly ash is sold in the United Kingdom as a structural light weight aggregate under which trade name?

1. Fly ash from coal combustion is pelletised, then sintered at 1000–1200 °C to produce a light weight aggregate. 2. The resulting aggregate is sold in the United Kingdom under the trade name Lytag. 3. Haydite, Leca and Agilite are trade names for bloated clay aggregates patented in Western countries. 4. Lytag has high strength-to-density ratio and relatively low drying shrinkage. 5. So fly ash routes to Lytag, while clay routes to Haydite, Leca and Agilite. _Source: IGNOU Concrete Technology, Unit 11 "Special Concrete" (Light Weight, Aerated, No-Fines, High Density, Fibre Reinforced, Polymer Concrete)._