What will dissolve concrete. 
Q. What will dissolve concrete in the shortest time? Preferably non toxic.

A. You can try this Concrete dissolver/remover from Zep.

DESCRIPTION
Zep'...

How to make concrete fence posts and mail box supports  Not rated yet
Q. What is the best way to make multiple concrete fence posts 4" sq without having to make a lot of forms? What mix is best to use?

A. Depending on ...

How do you join new concrete to old concrete?  Not rated yet
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Our downtown loft has great exposed concrete   Not rated yet
Q. Our downtown loft has great exposed concrete, the sad thing is someone painted over part of it. How can I get them back to a great looking concrete....

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Q. We are currently building a deck, it's over 2m from the ground so our footings were quite deep 450x450x650+ in most cases.

With the design of the ...

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A. It will lighten up with time but will ...

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A. Concrete weighs approximately 25 lbs per square foot ...

Polishing concrete countertops  Not rated yet
Q. How long should I wait after the forms are removed from a cast in place countertop before I start polishing?

Thanks

A. That depends on the countertop ...

How many bags of cement in a cubic yard of concrete?  Not rated yet
Q. What is the number of bags of Portland cement to add to a cubic yard of stone mix?

A. I built a whole page about this. Concrete mixing ratios ...

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1) remove ...

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concrete reinforcment  Not rated yet
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Can I paint my concrete steps  Not rated yet
Q. Is it best to paint, stain or epoxy outdoor concrete steps?

A. Epoxy and Paint are very sensitive to moisture, these are not the best choice for ...

Strength of concrete  Not rated yet
Hi,

I purchased a house where the previous lunatic cast a balcony floor using concrete lintels and hollow concrete pipe as a support. My plan is to ...

Concrete brand  Not rated yet
Q. please tell me about another concrete brand like Sika or BASF?

A. We use concrete products from Elite crete, Mapai, CementAll & Ardex.

Cleaning Concrete Driveway  Not rated yet
Q. How do I remove car drippings from my concrete driveway?

A. Removing oil and other drippings from a concrete driveway is a common problem. Keeping ...

Repair concrete countertop crack  Not rated yet
Q. I have a crack that appeared just after we poured our countertop. It seems to go all the way through (I can see it on the edge) it has not been sealed,...

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Q. I am watching a History Channel show entitled 'Jobsite: Concrete Countdown.' In this episode they tell the story of a concrete truck driver as he ...

how many bags of cement required for 1 cubic meter of concrete  Not rated yet
Q. Please tell detailed estimation of 1 cubic meter of concrete, how many bags required?

A. You will need 672 pounds or 304 kilograms of cement for ...

Is this a properly installed sub-base for concrete slabs?   Not rated yet
We have a contractor out pouring new concrete slabs for us (12 of them). The reason for the new slabs is some were hollow, or sunk down about 2 to 4 inches ...

Measuring a pile of concrete  Not rated yet
Q. If I have a pile of concrete, how can I calculate how much concrete is in the pile?

A. A cubic yard of concrete measures 3' wide by 3' tall by ...

Repairing Concrete Steps  Not rated yet
Q. Which type of concrete is best to use to level steps when there is some paint remaining on the steps? Since the paint is resisting chemical and mechanical ...

Which product to use  Not rated yet
Q. I'm wanting to replace the wood 2x4 joints in my patio, which are starting to rot with concrete. What is the best product to use to fill this 1.5"x2....

Concrete numbering system  Not rated yet
Q. Whats the difference between M40 - M60 grade concrete?

A. M-40 grade concrete:
Requirement of materials per cubic meter
Cement = 400 kg
Water ...

What is the best Epoxy for attaching two concrete items?  Not rated yet
Q. We have a little concrete angel that stands about six inches high with a base approximately four inches oval shaped, that my wife painted and wants ...

white spots on concrete   Not rated yet
Q. We have had white spots on our garage floor for about a year. Now they are getting black centers and look like little craters. These are dime to nickle ...

Powder cement  Not rated yet
A. I got about a thousand pounds of dry cement/concrete powder. Was wondering how I could find out what type it is and also what ratio to mix with sand ...

Patching a hole in Foundation  Not rated yet
Q. My house has a 10" poured concrete foundation. There is a small hole (8" x 12")in the foundation that was used as a vent into a cold storage room. The ...

classes of concrete  Not rated yet
When going through building plans I encounter construction jargon where I am instructed to cast class 25, 20 or 30 of concrete. What are these classes ...

Concrete slab on a slope without footer  Not rated yet
Q. What is the name of a solid concrete slab with out a footer on a slope called?

A. A concrete slab poured without a footing is called a monolithic ...

Repairing exposed aggregate concrete  Not rated yet
Q. We have just had a concrete pathway done in the exposed aggregate finish. The company has not done a very good job as there are loose stones on top ...

How much to install a concrete slab?  Not rated yet
Q. I am wanting part of my garden concreted. At the moment it is soil and not very level. The area to be done is about 12 ft by 14 ft. I want to get someone ...

concrete statue  Not rated yet
Q. I need to make a statue from concrete and am planning to use a paper mache mold(realize structure of form may be questionable) but I'm not exactly ...

Setting time of Concrete  Not rated yet
Q. OUR CONSTRUCTUAL REQUIREMENT IS CONCRETE(REINFORCED) SHOULD BE POURED WITHIN 2HOURS FROM WATER ADDED TO CEMENT. I WANT TO KNOW IF 2 HOUR IS OVER ,THEN ...

Mega Concrete Structures  Not rated yet
What is the tallest concrete building?

The worlds 10 tallest concrete skyscrapers.


1. Trump International Hotel ...

Rebuild on garage floor after fire  Not rated yet
Q. Can I rebuild my garage on my existing concrete pad? There was a major fire that completely destroyed the structure. How can I tell if the floor is ...

How many bags of cement are in a cubic meter of concrete?  Not rated yet
Q. How many bags of cement are needed to mix one cubic meter of concrete?

A. One cubic meter of concrete is equal to 1.308 cubic yards of concrete....

Effects of shape and size of aggregates in concrete  Not rated yet
Q. How does the shape and size of coarse aggregates affect the properties of concrete?

A. Aggregate shape and surface texture influence the properties ...

Concrete Rating - xyz? Lbs per square inch  Not rated yet
Q. Our company was recently deployed to Iraq where an existing building was modified to host a fixed base Instrument Flight Trainer (IFT). I'll just ...

Where to get concrete supplies  Not rated yet
Q. Hi, Where do I get concrete stains and colours? I would like to colour the outside of some concrete ornaments to make them look old or rusty but I ...

Preformed concrete porches  Not rated yet
Q. How do i go about finding installers for preformed concrete stairs? Also interested in the heat mats in place.

A. You didn't say where you were ...

Pouring concrete steps against a house  Not rated yet
Q. How do I treat the interface between the wood house and the concrete of the steps to make it water tight and be able to deal with the different movement ...

Stamped concrete salt damage  Not rated yet
Q. Someone cleaning the sidewalk from the city threw salt on my stamped concrete. I have some pit marks and it took the top layer off. Want to know ...

footings  Not rated yet
Q. Had footings poured, just after they finished, it poured rain all night. Now, there is water standing in the footings, will it need to be repoured or ...

Concrete Dyes  Not rated yet
Q. I am planning on using a concrete dye for my countertops. I want to polish them to a glossy finish. Do I polish first & then dye or do I dye & then ...

Cracks in concrete patio  Not rated yet
Q. I had a concrete patio pored 3 months ago. I have a 6 foot hairline crack in the patio and the red color I had added is fading already, Is this normal?...

Size of Concrete slab for hot tub  Not rated yet
Q. I recently purchased a home in NC (eastern, frost not a concern) that came with a sunken hot tub in the sunroom/deck area. Sounds nice, but original ...

Removal of hard water stains on colored concrete  Not rated yet
Q. I Have a fountain and it is three tiers - each tier ledge is colored concrete - due to the hard water in our region it has begun to show calcification ...

Industrial foundation repair, operating temperature 800 degree f  Not rated yet
I have been asked to recommend a foundation repair for an exchanger in a refinery, the temperature at the foundation is 800 degrees f. Based on the photos ...

Concrete and trees  Not rated yet
Q. Is concrete, in its slurry form, toxic to tree roots exposed by excavation?
I understand about the effects of permeable surfaces around trees but ...

color of natural concrete  Not rated yet
Q. I am having a new home constructed. The porches are concrete and have a nice tan/creamy color. The steps however are a gray color not at all like the ...

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Q. What kind of concrete mix would I need to withstand 1500-2000 degrees? Or is there something you can do to concrete to withstand that much heat?

A....

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Q. I live in Ontario, Canada. I am putting an indoor pool in the basement of a new house. I will use geothermal and radiant floor heating. Can I use coloured ...

Heat resistant concrete  Not rated yet
Q. What type of concrete mixture would be best suited for use on a fire training pad ? The pad will contain steel pans with water and diesel fuel and ...

New patio concrete damaged by powerwasher  Not rated yet
Hi,

Q. I just had some new cement poured for a patio area. Not knowing any better I cleaned the area off with a power washer a few days after it was ...

Cost of colored concrete  Not rated yet
Q. Does colored concrete (adding the bags to the mix) cost more than troweling in colored surface hardener?

A. The cost to add color to the concrete ...