Along some track near a bike trail I saw a big pile of rubber rectangles the size and shape of tie plates. They were about 3/8" thick and black, with holes that matched where spikes would have been driven through. None of the tie plates in sight had any of the rubber rectangles under them. What would be their purpose? Just shims when needed? Are they made of rubber for some cushioning effect?
Thanks to Chris / CopCarSS for my avatar.
Adze pads (abrasion pads) - sounds like the insulated type (don't work worth a crap) ...somewhere in a crossing approach circuit?
With holes in them, probably used or failed. (crapped out, leftover after a tie gang went through?) Signalmen like 'em, trackmen would rather do without.
Concrete tie version is smaller and thicker than the wood version. Rail seat abrasion/wear and cant issues in concrete ties are a constant headache. In addition. the reinforcing steel cable in pre-stressed concrete ties fails faster with induced current in the tie.
Now I can't get "rubber biscuits" outa my head.
From http://www.senecarail.com/track-materials
"tie pads form a tough, resilient layer between the tie and steel plate, which helps prevent tie cutting, muffles noise and cushions vibration. In addition to being highly resistant to ozone, chemicals and weathering, Seneca tie pads are low cost and can increase savings on your track maintenance programs. Tie pads also help to reduce the loosening of track bolts, joints and spikes in tie plates. Tie pads are the low cost way to save on track maintenance.
Their pads are a combination of rubber and fiber. Another company Noble Rubber Corp, http://bridgetiepad.com/ makes theirs from recycled tires.
I tried to sell my two cents worth, but no one would give me a plug nickel for it.
I don't have a leg to stand on.
DSchmitt Their pads are a combination of rubber and fiber. Another company Noble Rubber Corp, http://bridgetiepad.com/ makes theirs from recycled tires.
It's nice to know that something else is made from recycled tires besides hockey pucks.
CSSHEGEWISCH DSchmitt Their pads are a combination of rubber and fiber. Another company Noble Rubber Corp, http://bridgetiepad.com/ makes theirs from recycled tires. It's nice to know that something else is made from recycled tires besides hockey pucks.
Can't ... get... "rubber biscuits" ...out of....my...head.......aaaaargh!
mudchicken In addition. the reinforcing steel cable in pre-stressed concrete ties fails faster with induced current in the tie.
You've got my attention; I never would have imagined that this would be a problem. What would induce current in the cables? Fields from nearby power transmission lines? I was thinking stray fields from traction motors, but they are only there for a short time. Does the induced current cause the steel to heat up?
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"A stranger's just a friend you ain't met yet." --- Dave Gardner
It doesn't take much and I don't really know the source. Details come from materials testing on failed pre-stressed concrete ties. It has become an issue in places in the industry, especially in the bonding interface between the polymer concrete and the pre-stressed wire rope.
Mudchicken said, and Murphy S., noted in his Thread: "...Can't ... get... "rubber biscuits" ...out of....my...head.......aaaaargh!.."
Yep, MC...'Rubber Biscuits' have a special meaning.
Ummm...is Duncan a finicky eater?
Carl
Railroader Emeritus (practiced railroading for 46 years--and in 2010 I finally got it right!)
CAACSCOCOM--I don't want to behave improperly, so I just won't behave at all. (SM)
mudchickenCan't ... get... "rubber biscuits" ...out of....my...head.... ...aaaaargh!
And now to properly credit the original artist:
The recycled crumbled rubber tire remnants are also converted into sidewalk 'paving' by a local company.
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He nibbles like most scotties. Not that picky though...
(OTOH, Gus was a Hoover.)
mudchickenIt doesn't take much and I don't really know the source. Details come from materials testing on failed pre-stressed concrete ties. It has become an issue in places in the industry, especially in the bonding interface between the polymer concrete and the pre-stressed wire rope.
I'll certainly defer to anyone with a better technical understanding of this.
Murphy: Is there a bridge with an open timber deck nearby ? Sometimes the pads are used there for many of the same reasons that are mentioned above by other posters.
- PDN.
mudchickenNow I can't get "rubber biscuits" outa my head.
Bet they go well with rubber chickens.
Paul_D_North_Jr mudchicken It doesn't take much and I don't really know the source. Details come from materials testing on failed pre-stressed concrete ties. It has become an issue in places in the industry, especially in the bonding interface between the polymer concrete and the pre-stressed wire rope. I'll take a wild guess and speculate that it may be the result of the alternating current in the rails that's used for both the block signal circuits and the grade crossing circuits (different frequencies). As I understand it, the continuously varying AC creates a changing magnetic field, which induces an electrical current in anything metal nearby - such as the pre-stressing cables in the ties. Depending on whether the cables are coated and with what, that current may then cause a galvanic reaction and lead to corrosion of the cables, at least on the surface which is exposed to the concrete - which is where the bond between them is most critical. I'll certainly defer to anyone with a better technical understanding of this. Murphy: Is there a bridge with an open timber deck nearby ? Sometimes the pads are used there for many of the same reasons that are mentioned above by other posters. - PDN.
mudchicken It doesn't take much and I don't really know the source. Details come from materials testing on failed pre-stressed concrete ties. It has become an issue in places in the industry, especially in the bonding interface between the polymer concrete and the pre-stressed wire rope.
I'll take a wild guess and speculate that it may be the result of the alternating current in the rails that's used for both the block signal circuits and the grade crossing circuits (different frequencies). As I understand it, the continuously varying AC creates a changing magnetic field, which induces an electrical current in anything metal nearby - such as the pre-stressing cables in the ties. Depending on whether the cables are coated and with what, that current may then cause a galvanic reaction and lead to corrosion of the cables, at least on the surface which is exposed to the concrete - which is where the bond between them is most critical.
mudchicken CSSHEGEWISCH DSchmitt Their pads are a combination of rubber and fiber. Another company Noble Rubber Corp, http://bridgetiepad.com/ makes theirs from recycled tires. It's nice to know that something else is made from recycled tires besides hockey pucks. Apparently you never have been to Texas with their crumble rubber asphalt (good stuff), gone over an OMNI rubber grade crossing or seen the current "prescription" artificial turf on a ballfield. Can't ... get... "rubber biscuits" ...out of....my...head.......aaaaargh!
Apparently you never have been to Texas with their crumble rubber asphalt (good stuff), gone over an OMNI rubber grade crossing or seen the current "prescription" artificial turf on a ballfield.
ChuckCobleigh mudchicken Now I can't get "rubber biscuits" outa my head. Bet they go well with rubber chickens.
mudchicken Now I can't get "rubber biscuits" outa my head.
Thanks, Paul North. I hadn't thought about the current for the signal circuits.
One thing I did think about was back in the late '60's when computer memories were almost exclusively core, the company I worked for developed plated wire memory which could be made for considerably less cost. The wires were plated with a thin magnetic coating that would be polarized in either direction in small spots by other wires running across them in close proximity. They had problems early in the program when the soft epoxy that held the wires in place was too hard. The metal actually expands slightly when magnetized, and the hard epoxy was preventing it from switching polarity. I doubt that this slight expansion would be a problem at the scale we're talking about for ties, but it brought back some memories.
mudchicken Can't ... get... "rubber biscuits" ...out of....my...head.......aaaaargh!
blue streak 1 mudchicken Can't ... get... "rubber biscuits" ...out of....my...head.......aaaaargh! Guys think MC will pass this lexicon onto the boys in the field ? Something new for the work gangs ?
the term is already used with certain types of direct fixation transit track primarily in subways.
MikeF90 mudchicken Can't ... get... "rubber biscuits" ...out of....my...head.... ...aaaaargh!
mudchicken Can't ... get... "rubber biscuits" ...out of....my...head.... ...aaaaargh!
Maybe can get my daughter who lives near downtown DEN to deliver some of her patented rubber Biscuit repellant to MC.
Rubber Chicken Dinners,,,,been to many of those
MC,
With apologies to Boss Hen, and other women of lesser culinary ability, my first wife could destroy a good cut of beef simply by touching it. There are times men are better in the kitchen. Nuff said lest Mookie call me down on that. LOL.
Norm
Norm48327With apologies to Boss Hen, and other women of lesser culinary ability, my first wife could destroy a good cut of beef simply by touching it. There are times men are better in the kitchen.
I was watching a show in Mom's room where they were visiting various steak houses. It was funny seeing the differing opinions offered on how to cook a steak - each being made without knowing what others had said. Now I don't know whether to season before or after, or to flip the steak often, or just once... All were presented as desirable...
Larry Resident Microferroequinologist (at least at my house) Everyone goes home; Safety begins with you My Opinion. Standard Disclaimers Apply. No Expiration Date Come ride the rails with me! There's one thing about humility - the moment you think you've got it, you've lost it...
Norm48327 MC, With apologies to Boss Hen, and other women of lesser culinary ability, my first wife could destroy a good cut of beef simply by touching it. There are times men are better in the kitchen. Nuff said lest Mookie call me down on that. LOL.
Did you watch reruns of an old TV show called "Danger Is My Business"?
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