Before understanding the use of LC7.5 lightweight aggregate concrete, we need to explain the name:
LC stands for "lightweight concrete".
7.5: Represents its strength grade, with a standard compressive strength of 7.5 megapascals for cubes. This strength is roughly equivalent to the C10-C15 grade of traditional concrete and belongs to low strength concrete.
Lightweight aggregate: refers to the aggregates used to mix concrete, such as ceramic particles, pumice, expanded perlite, waste residue, etc., which are porous and lightweight.
Therefore, the core characteristics of LC7.5 lightweight aggregate concrete are: light weight and low strength. Based on this core characteristic, its main uses can be divided into the following categories:
1、 Main purpose: Filling of non load bearing structural parts
This is the most common and widely used application of LC7.5 lightweight aggregate concrete. It is mainly used for large volume filling in buildings that do not directly bear the main structural loads, in order to reduce the weight, insulation, sound insulation, and other purposes of the building.
Roof slope, leveling and insulation layer:
Usage: On flat or sloping roofs, use it to lay a certain slope to facilitate drainage. Meanwhile, due to its porous interior, it also has certain thermal insulation properties.
Advantage: It greatly reduces the weight of the roof and lowers the load requirements of the building structure, which is particularly important for high-rise buildings and large-span structures.
Floor cushion layer:
Usage: Lay a layer of LC7.5 concrete as a cushion layer above the structural floor slab and below the decorative surface layer (such as floor tiles and wooden floors).
Advantage:
Reducing self weight: also to "reduce the burden" on the building structure.
Convenient for burying pipelines: It is easy to bury underfloor heating pipes, electrical conduits, etc. inside.
Leveling: Provide a flat base for the upper decorative material.
Sound insulation: It can effectively reduce the impact sound transmission between floors and improve living comfort.
Backfilling of toilets, balconies, etc.:
Usage: In areas where sunken design is required for bathrooms and balconies, use LC7.5 concrete for backfilling to create drainage slopes.
Advantages: The weight is much lower than that of ordinary soil or gravel backfill, which can effectively prevent cracking or deformation of the floor due to excessive backfill.
The cast-in-place part of the external wall insulation system:
Usage: In some composite wall insulation systems, it is used for on-site pouring of insulation sandwich layers.