| 摘要 |
<p>A method of making a building product by mixing slate particles, clay particles and water to form a formable homogeneous mixture where the slate particles and the clay particles are substantially all sized so as to pass through a sieve of 1mm and such that not more than 25% of the slate particles have a size less than 63 microns. The ratio by weight of the slate to clay in the mixture is between 40 and 60%. The wet mixture is extruded, partially dried, cut into lengths and fired at a temperature of at least 950°C, converting clay into a binder material. Also disclosed is a method of making a building product by mixing slate particles with water sufficient to wet the particles over their entire surface area, mixing the slate with clay particles to produce a homogeneous formable mixture. The mixture is extruded, partially dried, cut into lengths and fired, converting clay into a binder material.</p> |
