No, you should not pour cement into your tumble dryer or any appliance. Pouring cement into a tumble dryer would cause severe damage to the machine and render it inoperable. Cement is not meant to be used in household appliances and could cause blockages, clog the machine's mechanisms, and potentially result in a safety hazard.
Tumble dryers are designed specifically for drying clothes using heated air circulation. Adding cement or any other foreign substance to the dryer would interfere with its functionality and may lead to irreversible damage.
If you're looking for natural drying alternatives, consider air-drying your clothes on a clothesline, using drying racks, or utilizing natural ventilation in a well-ventilated area. These methods are safe and effective for drying clothes without risking damage to your appliances.