| 摘要 |
<p>A method of making a lightweight aggregate comprises mixing together less than 80% by weight of pulverized fuel ash, greater than 20% by weight of cement and an amount of expanded polystyrene beads having a particle size of less than 2.5 millimetres, such that the volume of polystyrene beads is from 15% to 80% of the total volume of the final mixture, to form a pelletisable mix, forming the mix into pellets having a diameter less than 15 millimetres and curing the pellets in a moist atmosphere at a temperature below the boiling point of any expanding agent within the polystyrene beads. Building blocks prepared from this lightweight aggregate, in which liquid or powdered fuel, or hydrated lime, may replace some of the cement.</p> |
