Lightweight foamed concrete (LFC) thermal and mechanical properties at elevated temperatures and its application to composite walling system

摘要: LFC is cementatious material integrated with mechanically entrained foam in the mortar slurry which can produce a variety of densities ranging from 400 to 1600 kg/m3. The application has been primarily as filler civil engineering works. This research explores potential using building construction, non-load-bearing partitions lightweight load-bearing structural members. Experimental and analytical studies will be undertaken develop quantification models obtain thermal mechanical properties at ambient elevated temperatures. In order property model, treated porous effects radiant heat transfer within pores are included. conductivity model results very good agreement experimental obtained guarded hot plate tests inverse analysis slabs heated one side. Extensive compression bending temperatures were performed for 650 1000 kg/m3 unstressed LFC. test indicate that porosity mainly function density changes little different reduction strength stiffness high predicted normal weight concrete provided based on ordinary Portland cement. Although low comparison concrete, may used partition or light walls rise residential construction. To confirm this, composite walling system consisting two outer skins profiled thin-walled steel sheeting core under axial compression, thicknesses 0.4mm 0.8mm correspondingly. Using these results, developed calculate maximum capacity walling, taking into consideration local buckling effect shape core. preliminary feasibility study achieve insulation performance fire resistance. A single layer panel about 21 mm would able attain 30 minutes standard resistance rating, comparable gypsum plasterboard. indicates proposed system, 100mm sheeting, sufficient load carrying low-rise construction up four-storeys.