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John Pelzers
  • Pleasanton, CA
  • United States
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Does blue pigment slow down curing

Robert, I'm guessing but perhaps your cement has a bluey undertone. The reason I say this is that one of my colors I call Olive has a high loading of yellow oxide with a speck of Black Iron oxide to…

Replied Jul 27

Casting at 95 plus

Not so funny when someone calls your style of concrete crappy eh? So stop saying sidewalk "crap-crete" to anything that isn't poured upside down into a mold. Technically, if you want to split hairs.…

Replied Jul 25

Casting at 95 plus

I'd take the advice of someone who sprays in 110 degrees all summer over someone who doesn't spray in 80 degrees. zero point two percent (0.2%) citric acid (on weight of cement) will NOT weaken your…

Replied Jul 25

Does blue pigment slow down curing

Depends on what they used as a thickener to keep the pigment suspended in the liquid system. Xanthum gum...not a problem Cellulose Ether or bentonite/montmorillinate clay style thickeners...delayed s…

Replied Jul 22

 

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John Pelzers replied to concretista's discussion 'Does blue pigment slow down curing'
Robert, I'm guessing but perhaps your cement has a bluey undertone. The reaon I say this is that one of my colors I call Olive has a high loading of yellow oxide with a speck of Black Iron oxide to twist in the blue tone.....yellow and blue make gre…
on Tuesday
John Pelzers replied to Benton Wahl's discussion 'Casting at 95 plus'
Not so funny when someone calls your style of concrete crappy eh? So stop saying sidewalk "crap-crete" to anything that isn't poured upside down into a mold. Technically, if you want to split hairs...GFRC is not what you'e fella's are making anyway…
on Sunday
John Pelzers replied to Benton Wahl's discussion 'Casting at 95 plus'
I'd take the advice of someone who sprays in 110 degrees all summer over someone who doesn't spray in 80 degrees. zero point two percent (0.2%) citric acid (on weight of cement) will NOT weaken your mix...CSA or OPC and give you a 30 minute extended…
on Sunday
John Pelzers replied to concretista's discussion 'Does blue pigment slow down curing'
Depends on what they used as a thickener to keep the pigment suspended in the liquid system. Xanthum gum...not a problem Cellulose Ether or bentonite/montmorillinate clay style thickeners...delayed set. Surely the supplier has tested this and let y…
July 21
John Pelzers replied to Mike Cimino's discussion 'Hand held mixers'
Dunno..I'd say 1/2 yard minimum and 1 yard max. the loading logistics will be fun to figure out. I doubt it will start with a full load, so it will have to be loaded while running. (one yard self dumping hopper is our current thought. The problem I…
July 21
John Pelzers replied to Mike Cimino's discussion 'Hand held mixers'
I just installed one of these bad boys at a friends factory. Mixes 1 yard in 90 seconds...we should have a trial batch run next week, it's either going to be awesome or a catastrophic failure. Voeller cyclo-mixer
July 21
John Pelzers replied to Aron Buterbaugh's discussion 'circular molds'
Yea...sorry Aron...the "cement" bit sounded a bit like you had never poured anything and you had managed to land a commercial job. Glad to see that you are and expert and not a hack on a first time project that will tank on you and then have a desig…
July 14
John Pelzers replied to Aron Buterbaugh's discussion 'circular molds'
Interesting question...have you poured "cement" before?
July 13
John Pelzers replied to Beau's discussion 'Has anyone noticed the Speedo ad on this site?'
aka "budgie smugglers" where I'm from...let your imaginations run wild :-)
July 12
John Pelzers replied to Gregg's discussion 'Torsion Box Construction : plywood or MDF'
why not use steel framing studs and channel? My factory dividing walls are as straight as an arrow and 18 ft tall to the bottom of the glu-lam. If you skin both sides it would be impossible to warp or sag when layed out as a table. Home depot even c…
July 11
John Pelzers replied to Bryan Raymond's discussion 'Bullnose edge?'
July 9
John Pelzers replied to Bryan Raymond's discussion 'Bullnose edge?'
if you use smooth red stucco tape on both the face and the back, you can bend it tight around your body! Tape the face first, bend SLOWWWLY, then tape the bak to keep the shape. Also cut a piece about 4 inches long and tape the face. Use it as the f…
July 9
John Pelzers replied to Gregg's discussion 'Shop Floor'
Ditto on Matt's suggestion. Polish with a densifier. Sealers are a maintenance issue with epoxies being too brittle so will chip if you drop your hammer. Polyaspartic is ideal but too expensive for a workshop.
July 8
John Pelzers added 2 photos
July 8
John Pelzers replied to Scott Olsen's discussion 'Acrylic Sealer Help'
Water based acrylic or Solvent based acrylic? white sounds more like dust from sanding...did you wipe down or use a "tack cloth" after sanding? If you wet sanded and it was a water based acylic, you could have a "blush". Quick fix on a "blush" is to…
July 7
Taylor Kubicek commented on John Pelzers's photo 'DSC00052'
That's a great green.
July 7

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At 7:46am on January 19, 2010, Shawn Hays - Blueconcrete.com said…
FOR IMMEDIATE RELEASE
PR Log (Press Release) – Nov 16, 2009 – Singapore - German specialty chemicals company LANXESS has broken ground on a new manufacturing plant for black iron oxide pigments in Jinshan, Shanghai. This plant, belonging to the Inorganic Pigments (IPG) business unit, is scheduled to go on stream in the fourth quarter of 2010, and will have an annual capacity of 10,000 tons.

At the Jinshan site, the IPG business unit already operates a yellow iron oxide pigment plant which has an annual capacity of about 30,000 tons.
 
 
 

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