How can I verbs concrete slabs outside? I have concrete slabs outside my work, and they are really...

I have concrete slabs outside my work, and they are really dirty. I've tried wet and a stiff broom, but it just doesn't cut it! Any commercial cleaners or home remedys?!

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Answers:    Wet down the slabs and put bleach on the stains and use your broom to scrub it contained by to the concrete. let set for 10 minutes and wipe up off beside water.

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H2SO4 sulphuric sharp ,tho one you use in motor battery mix beside same amount of water and spill over .after 15 min: brushing beside long handle brush .than rinse out down .
if your dirt is from alleges use sodium bicarbonate solution will help you

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