Concrete blocks are a common sight at construction sites, being made from a lightweight aggregate mixture and offering insulating properties, with low thermal conductivity. Most blocks are load-bearing and when used to create cavity walls, they help to contain both heat and noise, as well as preventing damp.
Relevant image keywords:
aggregate, aggregate blocks, blocks, bricks, building, building site, concrete, concrete blocks, concrete bricks, construction equipment, construction industry, construction site, equipment, foundation bricks, grey, group of objects, industry, large group of objects, no people, objects/equipment, outdoors, pallet, pile, place of work, site, stacked, sunny