residue
In number theory, an integer q is called a quadratic residue modulo n if it is congruent to a perfect square modulo n; i.e., if there exists an integer x such that:
x
2
≡
q
(
mod
n
)
.
{\displaystyle x^{2}\equiv q{\pmod {n}}.}
Otherwise, q is called a quadratic nonresidue modulo n.
Originally an abstract mathematical concept from the branch of number theory known as modular arithmetic, quadratic residues are now used in applications ranging from acoustical engineering to cryptography and the factoring of large numbers.
View More On Wikipedia.org
x
2
≡
q
(
mod
n
)
.
{\displaystyle x^{2}\equiv q{\pmod {n}}.}
Otherwise, q is called a quadratic nonresidue modulo n.
Originally an abstract mathematical concept from the branch of number theory known as modular arithmetic, quadratic residues are now used in applications ranging from acoustical engineering to cryptography and the factoring of large numbers.
View More On Wikipedia.org
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Vinyl glue residue
I have a small 2br on slab 1950’s originally had 9” vinyl tiles and dark brown/ black adhesive. After the tiles were removed the abaters softened/dissolved the glue and mopped and wiped up what they could. I scrub brushed and mopped to clear. The slab is discolored and retains imprints in the...- msjenkins
- Thread
- glue residue vinyl
- Replies: 8
- Forum: The Welcome Forum
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Silicone Residue Help
Hi Guys, I've recently tiled my own bathroom and all went well but I have noticed about an inch of silicone residue on either side of the silicone after using a plastics tool to get a good silicone line, I cannot remove with a Stanley blades as it doesn't touch it, its almost like it has soaked...- jjuk26
- Thread
- help residue silicone
- Replies: 1
- Forum: DIY Tiling Forum
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White adhesive residue stuck to black slate effect tiles.
I’ve got some white adhesive residue stuck to the surface of black slate effect tiles. Give them a wipe with a damp cloth and the residue is invisible but when it drys it becomes noticeable again. Tried hard bristle brush with boiling water but due to the texture of the tile I just can’t get...- Bando01
- Thread
- adhesive black residue
- Replies: 1
- Forum: DIY Tiling Forum
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White residue?
I have tried to clean my stone floor with lithofin multi purpose cleaner and it has left a white residue that I can't remove. Does anyone know what it can be and how I can resolve the problem. This is the second time I’ve cleaned the floor and this didn't happen the first time 🤷♀️ -
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Ceramic Tiled Shower gets covered in white residue after one shower.
Hello, we installed a brand new ceramic tile walk in shower about one year ago. I've been cleaning it with a special cleaner for ceramic tile and it does okay. I bought an electric scrubber to make the job easier, and for some reason, and I don't know if it's related, lately I can have the...- Glowingnova
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- Forum: Tanking and Wetrooms Forum
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Z
Dark grout going white and dark residue on cloth when cleaning
Hi, We got our bathroom done just over a year ago. The tiler used mapei grout in river grey. I have noticed some of the grout lines turning white and when I try running it off I get stains on the cloth the same colour as the grout. Does anyone have any advice?- Zoe1994
- Thread
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- Replies: 1
- Forum: Adhesive and Grout
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Quarry tiles dry white
Help! I have Victorian quarry tiles laid on dirt. I’ve just spent days cleaning them first with HG cement, mortar & efflorescence remover as there were little bits of cement here and there after steam cleaning, then with HG Terracotta Remover. The previous owners I think just put polish over...- Gardengirl
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- Replies: 3
- Forum: Tile Cleaning and Restoration Forum
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Residue remover stained grout
Hi folks,Im looking for some advice on cleaning grout on a floor I just tiled. I've just fitted 35m2 of porcelain plank tiles and grouted with bal Micromax grout.it was a textured anti slip tile and it was a bit of a nightmare getting the grout off so I used some HG residue remover witch has...- Tam
- Thread
- grout residue tile grout
- Replies: 3
- Forum: Tile Cleaning and Restoration Forum
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Porcelain Removal grout residue face of porcelain tile
Evening good people. I have a major issue with roughly 200sqm of porcelain floors grouted by my now very much ex apprentice. I have a serious amount of residue left on the face of the tiles. The kid was doing fine while I was watching over him but when I left him alone, well its all gone to...- Makone
- Thread
- grout porcelain porcelain tile removal residue tile tile grout
- Replies: 26
- Forum: Adhesive and Grout
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Flat adhesive residue.
Morning all! Can I tile on this and if so do I need to prime or something? Removed a view tiles and got rid of adhesive until flat. Any help is appreciated.- theandroids
- Thread
- adhesive residue tile adhesive
- Replies: 1
- Forum: Adhesive and Grout
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Advice on cleaning black bathroom tiles that have white residue
Hi Guys -- sorry, newbie questions -- lots of them, feel free to invite others... Take a look at the attached photos. What on earth is causing this white residue on my bathroom floor tiles? How do I clean it i.e. what methods, tools, cleaners should I consider (can I use a steam...- tom8080
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- Forum: Tile Cleaning and Restoration Forum
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Grout residue left on oak worktops
Grout residue left on oak worktops..what's the best solution- Jon Thelwell
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- Forum: The Welcome Forum
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grout residue on tumbled travertine
Hi all I recently tiled a splashback using tumbled Trav. I grouted it today using mapai ultracolour plus. I completely cocked up because a. I didnt seal first. B I left it too long to clean off. I didn't realise this stuff sets so quick! I left it 5 mins to take a call and it had gone rock...- mr cocked itup
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- Forum: Specialist Tile -Stone, Porcelain, Glass
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Concrete floor residue query
I went to look at a small domestic floor job this morning and have a query over the floor prep. On lifting the existing cushioned vinyl flooring there is a 0.5mm film of black sticky residue on the concrete floor. Is this likely to be the adhesive that was laid to fix the vinyl. The vinyl is...- On one
- Thread
- aus concrete floor floor tiling query residue usa
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- Forum: Australia
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I
White residue on porcelain (slate finish)
Hi all finished laying 600x300 porcelain (slate finish) and grouted, in my sisters bathroom. went to check them about 2-3 days later and found a white chalky residue on tiles. very random, i.e. Some on centre of tile, some close to grout lines. have added some photos to show checked the...- icctiling
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- aus porcelain porcelain tile porcelain tiles residue usa white
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- Forum: Australia
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Sealed in Grout residue onto white limestone. Need adivce?
Hello all, Right, Ive done a 110sqm of limestone continuous floor. Its a non polished (matt) surface and obviously this makes it very difficult to completely remove all grout residue. I had washed it off, and repeated this 3 times. Assuming that i had got the majority, except it was left with a... -
Rayburn soot residue
Morning all.does anyone know of a primer to stop soot from penetrating through.ive already put four coats of slurry mix on and there is still bleeding coming through(.i scraped all residue then cup ground wall before priming).bal couldn't help when I spoke to them !!!!!:smilewinkgrin: -
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Chalky Residue from Tiling Help
Hi all, having just had my kitchen and bathroom retiled, I'm finding it difficult to remove the chalky residue from my kitchen tiles. The bathroom ones are fine, but I was wondering if anyone could give me some advice on what to use to totally remove the chalky residue? The tiles I have had put...- poshprice
- Thread
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- Forum: Australia
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Advice please - Residue on porcelain slate effect tiles
Hi we have tiled the bathroom with slate porcelain tiles and grouted using a ready mix glitter grout. This left a glue residue on the tiles, which we scrubbed to remove. This wasn't that successful. We have now re-grouted it black and we are still left with a white residue on the tiles. We...- Crazifuel
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- Replies: 1
- Forum: Australia
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Baldocer textured porcelain, transit wax residue
I've just laid a batch of 600 x 400mm Baldocer textured porcelain tiles and there's a shadow of the transit wax on the surface. Nine patches on each and every tile. I've not come across this before as the wax is usually on the upper surface not the underside and comes off easily. This is...
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