Concrete is a building material whose use has been widespread since 1 century. Obtained by the combination of concrete and steel bars The concrete itself is only a constitution of:
-cement.
-gravel.
-sand.
mixing water.
Bar steels are called reinforcement of b .a The building material is placed in enclosures called molds or formwork.
Concrete is poured into these floor enclosures,
Beams, beams, poles, soles, ...
good for the beginning :) , do not write kader in tags, tag science, steemstem, steemeducation, technology, civil engineering......ect and mention you picture resource , good luck
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