Limestone
it is clay
The raw materials needed to make cement are,Calcium oxidesilicon dioxideAluminium oxideIron oxideMagnesium oxideAlkaliessulphurtrioxide.
Limestone is used for various applications, including construction, as a building material, in the manufacture of cement and concrete, as a soil conditioner in agriculture, and in the production of lime products for various industries. Its composition, hardness, and durability make it a versatile and valuable resource for a wide range of industries.
Suresh Neotia 50% and Holcim (second large cement manufacture in world) of 50%
Asbestos cement
Suresh Neotia 50% and Holcim (second large cement manufacture in world) of 50%
K. Hennig has written: 'The technology and the material conditions for the manufacture of pozzolama [sic] cement using fly-ash' -- subject(s): Fly ash, Pozzuolanas
cement?
cement,crushed stone,natural gas petruleum and salt
no cement can not rust unless you add some type of iron or material that can oxidize into it
Ans: The costly material in concrete is cement
cement