TA Engineering (General). Civil engineering (General) 214 Technology: general issues 126 History of engineering and technology 85 Building construction & materials 84 TH Building construction 68 Compressive strength 46 Construction industry 44 TJ Mechanical engineering and machinery 41 Materials science 35 History of engineering & technology 34 human 34 Sustainable development 32 TH1-9745 Building construction 32 Humans 29 Civil engineering, surveying & building 28 History 26 Reinforced concrete 25 Research & information: general 25 TK Electrical engineering. Electronics Nuclear engineering 24 Materials of engineering and construction 23 TP Chemical technology 21 Architecture 20 Sustainability 20 Tensile strength 20 Building materials 18 Nanostructured materials 18 Cements 17 Archaeology 16 Concretes 16 Durability 15