0
I would start out by using a hot water pressure washer with a store bought driveway cleaner. You can rent one at your local hardware store. Chances are the muratic acid you used mixed with oil, dirt, or soap that was left behind on your driveway. Next, while the driveway is still wet, mix a small amount of the acid with water in a 5 gallon bucket. Use a disposable dust broom or masonry broom to scrub the acid into the concrete. You will notice that the acid will foam and have a froth on top. This is because the acid is burning the concrete. You will want to rinse the area you scrubbed the acid into right away with the pressure washer. If you fail to rinse ALL of the acid...your concrete will stain, which in your case is a tan color. I've cleaned a few brick and precast buildings in my time. P.S. Don't forget to wear eye protection.
Add your answer:
Earn +20 pts
What is creep in concrete?
Creep is what happens when concrete changes form because of pressure or load on the concrete. It can occur immediately or long term.
What is the maximum slope of a basement driveway?
Our design guidelines call for a maximum driveway slope of 10% for standard residential driveways, but an applicant is seeking something along the lines of 20%... One concern about a steep driveway is the vehicle bottoming out and scraping the ground where the grade changes from angled to flat.
Why do concrete roads have gaps between the large pieces of concrete?
The concrete gaps are called expansion joints to allow the concrete to expand and contract as the weather changes. Without expansion joint gaps, the concrete slabs would crack under the stress induced.
How do expansion joints in a sidewalk keep the concrete from cracking?
Expansion joints allow the concrete to expand and contract with temperature changes which prevents it from cracking.
What is the recommended slope on a driveway?
A 1/8th inch per foot slope is sufficient enough to properly drain any precipitation. Other than for the purposes of drainage, a slope on a driveway is unnecessary unless it is to deal w/ changes in elevation.
Is changes a concrete noun?
The noun 'changes', the plural form of the singular noun 'change' is a concrete or an abstract noun, depending on context.The noun 'changes' is a concrete noun as a word for the physical results of altering or modifying something; garments as a replacement for something one is wearing; a word for physical things.The noun 'changes' is an abstract noun as a word for processes of altering or modifying something; a word for the mental or emotional results of altering or modifying something; transformations or transitions from one condition or phase to another; a word for a concept.Note: The noun 'change' is an uncountable, concrete noun as a word for a group of coins or cash.The word 'changes' is the third person, singular of the verb to change.
How much does a cubic yard of concrete cost?
About $180 delivered in Philadelphia area. Price changes according to local.
Can you glue wood flooring to concrete subfloor?
I would not. The wood has to expand and contract with temp changes. Your floor will buckle if you do.
What are disadvantages of precast concrete?
THIS IS NOT GOOD FOR ENGINEERS WHO CHANGES HIS MIND EVERYDAY AND ALL THE PROVISIONS FOR ALL SERVICES WILL BE AFFECTED.
Why are there gaps at regular spots in the side walk?
They're called "expansion joints". Concrete expands and contracts with temperature changes. The expansion joints allow this to happen without cracking the concrete slab.
Can you explain the difference between physical changes and chemical changes?
A physical change is when a substance changes, but no new substance is formed. e.g. Ice melting A chemical change is when a new substance has formed. e.g. Concrete hardening
What is engineering significance of sand silt content?
Actually it changes ratio of cement to the other contents of concrete (Sand and crush). However an optimum percentage of cement sand and crush is decided by trial casting of concrete
