![]() ![]() The density of the aggregate used is generally proportional to the strength of the block, for example, super-lightweight aggregates like expanded clay and pumice used for their excellent thermal performance, feature a relatively low compressive strength. Lightweight concrete blocks are manufactured from cement, mixed with one of a variety of natural or man-made expanded aggregates such as granulated or foamed blast-furnace slag, expanded clay or shale, furnace bottom ash (FBA), pulverised fuel ash (PFA), or the less common pumice (that is a volcanic material). The lightweight block enables time and material cost savings through easier handling than larger units or a different block type with the same dimensions. The main advantage of lightweight concrete blocks over dense aggregate blocks is a combination of higher insulating properties and a lighter block unit weight. Lightweight concrete blocks are used in both internal and external walls where loading is slightly more restricted, or as infill blocks in beam and block flooring. Lightweight blocks are produced in greater volume but are less strong than dense concrete blocks. Lightweight concrete blocks can be used in external applications as well as a versatile range of internal applications. ![]() Lightweight blocks are also manufactured with lightweight aggregates for a lighter more manageable concrete block. Lightweight concrete blocks are high-level performance in load-bearing and other structural applications. Lightweight concrete blocks are ideal for commercial and leisure developments, providing an even surface for paint and other finishes, with excellent resistance to air permeability. ![]()
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