Why are there stones on railway tracks?
Why are there crushed stones alongside rail tracks?
What are the diamond shaped structures in the middle of railway tracks? What are the uses of stones in construction material? Why do we use stones in houses? Why are bricks burnt? Why do we use steel with concrete? What causes rust to form on concrete? What are "paving stones"? Why are concrete bricks not burnt but watered? What are those big metal grates you see on city sidewalks? What is the reason for embedding slightly bigger stones in Kolkata's roads? Why do tanks have tracks instead of wheels? What is the significance of the iron rods/tracks in between the rail tracks? (see image for reference) Which material is used to build running tracks? Are they softer than the material used in laying footpaths? Why are bridges in India mostly made of concrete rather than steel? How do rail lines work? Why are there so little houses in the U.S. made from materials such as brick, stone and concrete? What is the cause of moving stones of Death Valley? Why are Metro train flyovers constructed using cement instead of using only steel, which is enough to run Metro trains and would have saved substantial money and time? Why does a slab pull happen? Can I use quarry fines in producing Hollow Concrete Blocks? What stone is this? What is rail? How can I break concrete bricks with my bare hands? How are a bullet train's wheels assembled? Why does railway traction wire consists of two wires? Why is one rock the raw material for another? What type of rock is normally used in road construction? Was the earthquake in West Chester, PA, a result of hydraulic fracturing? Why are potholes round? Where I am from, old brick houses all have limestone foundations. Why is this? Is there a reason the foundation isn't made of bricks as well?