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Concrete

Jan 9, Remove Black Glue From Concrete – My Top Product And Best Method

How I remove black glue from concrete. I found the best product and show you the best method for removing black mastic adhesive from concrete.

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Being in the decorative concrete business, I’ve had to remove black glue from concrete floors many times.

When someone asks me to stain or epoxy their basement floor that was covered with tile or carpet, there’s always black mastic or yellow glue adhesive to remove.

I’ll be honest with you, there’s nothing easy about removing black or yellow glue from concrete. Sometimes you can scrape most of it off with razor scrapers, but I would never say it was easy.

What you need to know about black mastic/glue pre-1980

If you do have black glue on your concrete floor and you don’t know how old it is, it could contain asbestos. Most vinyl tile flooring installed in the 60’s, 70’s and early 80’s had asbestos in both the glue and the tiles.

Call an asbestos abatement company and get the glue & tiles tested if you’re unsure, you don’t want to create dust by scraping or grinding then breathe in the particles.

As long as the glue is wet and you don’t create dust, you can remove this stuff. You’ll just need to find out where you can dispose of it legally.

Different methods of removing black glue from concrete

FLOOR SCRAPER:

We use floor razor scrapers to remove the tiles, carpet, and the black glue on the concrete. The handle is long enough so you get good leverage to scrape with.

Make sure you get plenty of extra razor blades, they get dull fairly quickly.

We always start with these first when we remove adhesives from concrete.

Scrape off as much as you can. It’s hit or miss with these. Sometimes you can remove most of the glue this way and sometimes not much at all.

Once you get a small area scraped clean, keep scraping from the cleaner spot into the glue. 

This method helps you get the razor blade under the glue and lift it off the concrete.

Again, if you’re unsure how old the black mastic is, make sure it’s wet when you scrape it. 

HOT WATER:

After you’ve scraped as much off as you can, you can try hot, boiling water to soften the glue.

Pour the hot water on the floor and let it sit for a couple minutes. When (or if) the adhesive becomes soft, scrape it again to remove what’s left.

Spread some kitty litter on the floor to help soak up the black liquid glue. Then you can pick it up with a broom and dust pan to dispose of it.






Using citrus based cleaners to remove black glue from concrete

If scraping and hot water doesn’t work, another way we remove the black glue from concrete floors is with a citrus based cleaner.

In the video below, Johnny Gallegos is using a cleaner that is purely citrus based. He mops it on, gives it some time to break down the adhesive, then squeegees it off.

You can use a wet/dry vac to pick up the liquid residue or you can spread some kitty litter on the floor let it soak into that, then use a flat shovel and put it in a bucket.

The citrus cleaner he’s using is D-limonene.

D-limonene is a by-product of the citrus juice industry.

It’s the major component of the oil extracted from the rinds of citrus fruits.

D-limonene is much safer to use than solvent based cleaners. It’s biodegradable but is classified as a slight skin irritant, so wear some gloves when using it.

See how it works removing black glue from concrete below.

As you can see in the video, the d-limonene citrus cleaner re-emulsifies the black glue. Now you can squeegee it and vacuum it off the surface.

Once all the black glue is gone, you will need to wash the floor and rinse it again to make sure any leftover residue is gone.

How to remove black mastic from a concrete floor

If all else fails, there is a black mastic remover called Bean-e-doo mastic and adhesive remover for concrete surfaces.

It’s now owned by Franmar and sold under the name Blue Bear. They also have another version called 500MR mastic remover. Both products are virtually the same.

They are made from soybeans so they have almost no odor and are very safe to use.

Here’s a few videos showing you how to use this product and how good it works for removing black mastic glue.

If you decide to use this product, don’t forget to get their 700DG cleaner and degreaser. (formally called Emerge)

The video below is from Franmar and is showing you how to use the 500MR mastic remover to remove yellow linoleum glue. 

This video below is showing you how to remove yellow carpet glue adhesive using Bean-e-doo (Blue Bear) mastic remover.


Learn how to remove oil stains from concrete.

Find out the best way to remove rust stains from concrete.

My best method to remove carpet glue from concrete.

What I use to remove cat urine from concrete.

Go back to How to clean concrete

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Source: https://www.everything-about-concrete.com/remove-black-glue-from-concrete.html

Concrete

Nov 24, How To Pour And Finish A Concrete Patio Slab (My Pro Tips)

I’ll show you how to pour and finish a concrete patio slab just like the pro’s do it. From leveling and screeding the concrete to broom finishing.

Republished by Plato

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The steps it takes to build, pour, and finish a concrete patio slab are:

  1. Prepare the sub-grade
  2. Install the forms and reinforcement
  3. Pour and level the concrete
  4. Finish the concrete
  5. Seal the concrete

prepare the sub-grade for concrete

The sub-base under your concrete patio wants to be either gravel, road base, sand, or crushed rock.

You’ll want to remove any sod, grass, clay, or dirt. How much you remove and replace with gravel will depend on where you live and how many freeze/thaw days you get during the winter months.

If you live where you get some to many freezing days, then more gravel is recommended under your concrete patio. A good base would have 12″ to 24″ of compacted gravel under the concrete.

If you live where you don’t get many temperatures below freezing then 4″ to 12″ of sub-base gravel would suffice.

If you have wet conditions, then more gravel and adding drainage would be recommended in that case.

To help keep frost from getting under the patio, you can install 2″ styrofoam under the slab. This will insulate the sub-base and keep it from freezing.





install the forms and reinforcemenet

The thickness of your patio slab will determine what you use for forming material. Most likely your patio slab will be 4″ thick. That’s quite common for a patio slab. 

IF that’s the case, you can use either 2×4’s or 2×6’s to form your concrete patio. The size and shape of your patio will be determined by you and your space or area you have to install the patio.

Setting up forms is fairly simple. Here is more information about forming that will help you.

For reinforcement, you can use wire mesh or rebar. Both are good and will help reinforce the concrete if it does end up cracking.

how to pour and level the concrete

Pouring the concrete for your patio slab and getting it leveled out is something you might want to hire a professional for. 

If your patio slab isn’t very big, then maybe it’s something you can do on your own. 

Watch us pour this 50′ x 10′ concrete patio and see if it’s something you want to try or not.

To learn how to pour and finish concrete like we do in the video above, check out my training academy The Concrete Underground.

In The Concrete Underground I have many of my best training videos to teach you how to pour and finish concrete just like we do it.

how to broom finish and seal the concrete

Knowing how and when to start the finishing process is one of the hardest things to learn about concrete finishing.

In the video below, I will show you how we start the finishing process and apply a broom finish to the concrete.

The finishing is always determined by how fast of slow the concrete sets up. I’ll show you the best time to start finishing in the video below for best results.

I used a penetrating sealer to seal the concrete with in the video. This type of sealer will not leave a slippery film on the surface but will seal and protect your concrete.

It’s best applied with some type of sprayer. We’re using a power sprayer in the video but you can use a simple garden pump up style sprayer if you like.

tools you’ll need to build a concrete patio slab

I’ve made a list of all the tools you’ll need to build your concrete patio slab.

Most of these you can get at your local hardware store or even easier, you can order them right from Amazon.

Concrete tools list for building a patio slab.

IN CONCLUSION:

I built this page to help you decide if you want to pour your own concrete patio or not. 

If you kind of handy and like building and doing things on your own, then maybe it’s something you can tackle by yourself after watching my videos.

If the size of your patio slab isn’t too large, maybe you can do it yourself with the information I’ve given you on this page.

If you have any doubts or questions, then look to hire a pro like me. We do this kind of work every day.

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Source: https://www.everything-about-concrete.com/how-to-pour-a-concrete-patio-slab.html

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Concrete

Nov 21, Fast Setting Concrete Mix (Recipe-Ingredients-Mix Design)

I use this fast setting concrete mix for pouring all types of concrete. When you need your concrete to set up fast, this mix design will get the job done.

Republished by Plato

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A fast setting concrete mix has the following ingredients included to speed up the set time:

  1. Extra Portland Cement
  2. Water-reducing admixture
  3. Warm water (for mixing)
  4. An accelerator admixture (calcium chloride)

If you need a concrete mix that will set up fast, plan to use at least a 4000 psi mix. This type of mix has more cement than most of the regular concrete mix designs.

More cement in the mix means more heat of hydration as the concrete sets up, speeding up the curing process.

Using warm water will also help speed up the set times, especially if you’re pouring concrete in cold temperatures.

A water reducing admixture will help lower the water – cement ratio in the mix and still give you a workable mix to place your concrete. This helps with set times and improves the strength versus just using water.

Adding an accelerating admixture to the concrete will decrease set times by 10 – 30% in a lot of cases. 

cold weather fast setting mix for floors and patios






In the video above I’m using a 4000 psi concrete mix to pour this concrete floor. The concrete had 115 degree F water, 20oz of water reducer per yard of concrete, and we used two 50lb bags of calcium chloride in each truck load.

The outside temps were 32 degrees when we started pouring the floor. You can see the steam coming off the concrete as we get it spread out.

We started pouring at approximately 7 AM and we finished power troweling at 2 PM. The outside temperature never got above 41 degrees.

The most important ingredients for fast setting concrete are warm/hot water in the mix and using an accelerator like calcium chloride.

These two ingredients will speed up the set times of any concrete mix, whether it’s ready-mix or a bag mix like Quikrete or Sakrete.

does hot water make concrete set faster?

Using hot water to mix concrete will help speed up the set time by speeding up heat of hydration.

Heat of hydration is a chemical reaction that takes place when cement and water get mixed together. 

If the water is COLD, there is less heat that develops and the concrete sets up slower.

If the mix water is HOT, there is more heat that develops, which makes the concrete set up much faster.

Outside, ambient air temperatures as well as mix water temperatures HOT or COLD play a very important role in how FAST of SLOW concrete sets up. Hot = Fast and Cold = Slow (in most cases)

how do you make concrete set faster? (2 easiest methods)

The best and easiest way to make concrete set up faster is to use hot water to mix it with. If you use warm or really hot water, you’ll see an increase in the set time.

The 2nd best way is to use an accelerator like flake calcium chloride. You can use this instead of hot water if hot water isn’t available.

Most local hardware stores carry calcium chloride flakes/pellets in either 25lb or 50lb bags.

If you’re using an 80lb bag mix, only start using about 2 Cups of calcium chloride flakes to see just how fast it starts setting up and adjust up or down from there.

What is the fastest drying cement and concrete mix?

The fastest drying cement mix and concrete mix is the brand called RAPID SET from CTS CEMENT.

They have a rapid setting cement mix called CEMENT ALL. This cement mix sets up in only a few minutes and cures hard enough to walk on in 20 – 30 minutes. It comes in a blue bag or blue box at HD.

CTS also has a rapid setting concrete mix called, you guessed it, RAPID SET CONCRETE MIX. This also sets up in only minutes and has 3/8″ stone aggregate in it. It comes in a green bag and you can get it at HD.

I personally use both the Rapid Set Concrete Mix and Cement All for doing a lot of repairs and small concrete projects. Just beware, they both set up very fast. 

They actually have a “set slowing admixture pack” to slow the set and give you more working time if you think you’ll need it.

what is quikrete’s fastest setting concrete mix?

Quikrete has a RED bag called “Fast Setting Concrete MIx”. They claim is hardens in 20 – 40 minutes and can be walked on in 2 hours.

You can use this 50lb quick drying bag mix for steps, sidewalks, slabs, and for setting fence posts or a mailbox post.

This concrete mix can be used to set posts without mixing. Just dump the dry ingredients around the post and sprinkle with water for it to harden.

This mix will reach 4000 psi in 28 days.

Quikrete also has a “High Early Strength” concrete mix called Quikrete 5000. It’s not a rapid setting mix but does set up faster than their regular bag mixes. (I’ve used it for countertops)

This can be used for most anything; footings, slabs, walkways and floors. Just add some accelerator if you need it to cure faster. It’ll reach 5000 psi in 28 days. 

You can purchase either of these concrete mixes at Home Depot.

What is sakrete’s fastest setting concrete mix?

You guessed it, Sakrete has a 50lb bag called “Fast Setting Concrete MIx”. (I see a trend here)

It’ll harden in 30 minutes and you can walk on it in 6 hours & drive on it in 48 hours.

This can be used for setting posts, slabs, walkways, patios, curbs, and ramps.

It’ll reach 4000 psi in 28 days. You can get this at Lowe’s and most local hardware stores.

fast setting concrete additives – what to use

A fast setting additive for concrete mixes will greatly increase the set time and curing times of your concrete. 

Quikrete has a 1.5 lb Concrete mix accelerator that comes in a green and black box. You can add 1 or 2 of these to a 60 or 80 lb bag mix to speed up the set time. Purchase this right at Home Depot.

Sakrete has a 1 gallon bottle of “Cement Mix Accelerator” you can add to their concrete mix to speed up set time. 

How much you add and how fast they increase set times will also depend on how cold it is outside and how cold or warm the water is you use to mix with.

Another additive that’ll increase set times is flake calcium chloride. Just mix about a cup or two in the mixing water before adding your bag mix concrete. Then mix the concrete and use at as you normally would. Just move a little faster:)

We use a 50 lb bag of calcium per 5 yards of concrete when we pour concrete floors. This increases set times a lot in colder weather. Add hot water to the mix and you have a rapid setting concrete mix.

how much water do you need per bag?

Depending on which fast setting bag mix you choose, you’ll have to add the correct amount of water to achieve the best results.

Each brand is very similar when it comes to adding mix water, here is the breakdown:

  • Sakrete Fast setting concrete mix is 2.5 – 3 quarts of water per bag
  • Quikrete Fast setting concrete mix is 2.5 quarts of water per bag
  • Rapid Set Concrete Mix (green bag) is 3.5 to 4 quarts of water per bag

All these bag mixes have the mixing instructions right on the back of the bag. 

is fast setting concrete weaker than regular concrete?

The answer to that question is no, all these bag mixes are designed to reach 4000 psi at 28 days.

If you add more mixing water than the bags suggest then you could weaken the concrete. But just because it sets up faster doesn’t mean it’ll be a weaker mix.

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Source: https://www.everything-about-concrete.com/fast-setting-concrete-mix.html

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Concrete

Kryton Welcomes New Head of Sales in India

Recently, Kryton had the pleasure of welcoming Ashish Singh as the new head of sales at Kryton Buildmat Co. Pvt. Ltd. in India. Bringing over 25 years of experience in the construction chemicals industry with him, Mr. Singh comes with a good understanding of waterproofing products and technologies. He also has the knowledge necessary to […]

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Recently, Kryton had the pleasure of welcoming Ashish Singh as the new head of sales at Kryton Buildmat Co. Pvt. Ltd. in India.

Bringing over 25 years of experience in the construction chemicals industry with him, Mr. Singh comes with a good understanding of waterproofing products and technologies. He also has the knowledge necessary to work directly with large contractors as well as with distributors and applicators. With those qualities at his disposal, he is a welcome addition to the Kryton family.

Mr. Singh has worked for a variety of different companies throughout India. As a result, he has learned to manage business in the northern, eastern, western, southern, and central parts of India. He also has experience managing similar work for Sri Lanka, Maldives, Bangladesh, and Bhutan.

Throughout all that time, Mr. Singh has proven himself to be an energetic leader with a consistent record of delivering results in growth, revenue, operational performance, and profitability. Kryton is excited to see him join the team, and we look forward to working together to meet the needs of our customers.

Source: https://www.kryton.com/in-the-news/2020/11/17/10056/

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