Steinsteypa froðuefni vs. Froðueyðari fyrir steypu: Vísindalegur samanburður á loftstýringaraukefnum í nútíma sementsbundnum kerfum frumusteinsteypu froðuefni
1. Essential Duties and Useful Goals in Concrete Modern Technology 1.1 The Function and Mechanism of Concrete Foaming Agents (Concrete…



















































































