The document discusses methods for removing blockages inside cement silos. It describes manual removal using whipping systems or the Cardox system. The Cardox system involves mounting sockets on the silo wall, drilling holes through the sockets, inserting Cardox tubes, activating Cardox to break up blockages, and removing debris through the extraction port. The Cardox unit can be located anywhere, recharges in under a minute, and needs minimum maintenance.