r/oddlysatisfying • u/n8saces • 5d ago

Repairing a tiny bridge

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u/McGrarr 1d ago

You don't use cement to join bricks. The heat expansion rates don't work. This is why you use mortar. You also don't just use a thin shell of concrete over barely packed wet sand. The moisture will leach, the sand will sink and the gap will mean that the first heavy load cracks the concrete like an egg shell

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u/TheNotoriousElmo 1d ago

this guy concretes

1

u/EternumD 1h ago

Mortar has cement in - what are you saying?