Despite the antiquity of this method it is not too useful for concrete mixers.
Best solution to clean concrete mixer.
Apply a diluted hydrochloric acid solution to the inside of the drum if the cement still refuses to break free.
Your supplies are likely to be a bucket scrub brush and detergent.
Leave it 10 minutes or so maybe give it a few hits on the barrel as it spins.
Borax or laundry detergent are the first ingredient in your homemade concrete cleaner.
Considered one of the oldest and easiest cleaning methods.
These products are good for removing basic dirt and some stains.
When mixed with normal household vinegar and baking soda in a bucket with hot water you get an effective grease cutter and cleaning product.
Semi dirty outdoor concrete cleaner bleach water 1 8 cup dishwashing detergent.
Put on protective gloves and a breathing mask then apply the solution according to.
Clean baking soda residue by spritzing it.
Pour some water in the drum along with some old bricks or rubble and leave turning for about 30 minutes.
You should now have a clean cement mixer ready for work again.
For a gentle cleaning solution add one half cup of baking soda to 1 gallon of water.
Hydrogen peroxide or ammonia also work well too.
Often the sharp edges of the spade damage the inner surface of the drum which further adversely affects the cement solution.
The bad news for the fastidious homeowner is that.
Try putting broken up bricks in there with acid mortar cleaner and water and turn it on let it spin.
Could give this a try.
Mix equal parts baking soda water and salt for highly soiled areas.
Empty the drum of rubble and water.