A similar method, which does not include pore volume, is to suspend a known mass of particles in molten wax of known density, allow any bubbles to escape, allow the wax to solidify, and then measure the volume and mass of the wax/particulate brick.
This method is similar to another technique that does not take into account pore volume, which involves suspending a set amount of particles in molten wax with known density, allowing air bubbles to escape, letting the wax solidify, and then measuring the volume and mass of the resulting wax/particle composite.