Steel bars, deeply embedded in concrete, are used to keep a concrete road surface flat despite the weight of buses and trucks. These reinforcing rods prevent cracking or waviness of the slab. Engineers choose steel for reinforcing rods because of its coefficient of linear expansion, which helps to avoid thermal stress.
The passage supports the statement that a concrete road uses steel bars, deeply embedded in the concrete, to keep the road surface flat despite the weight of buses and trucks.
These steel bars, also known as reinforcing rods, act as sinews to take the stresses and prevent cracking or waviness of the road's slab.
Engineers use steel for reinforcing rods in concrete roads because steel's coefficient of linear expansion is nearly equal to that of concrete.
This helps to avoid thermal stress that can develop when components expand and contract, especially in cases where gaps cannot be left between the blocks.
Steel's strength, durability, and ability to resist corrosion make it an ideal material to reinforce road surfaces and prevent structural failures, such as the collapse of bridges.
Therefore, steel plays a crucial role in maintaining the safety and longevity of concrete roads.