Road snow removal sprinklers - GIF

Road snow removal sprinklers in Japan.

<video controls autoplay loop> <source src="https://diqn32j8nouaz.cloudfront.net/japan_thawing_sprinklers.mp4" type="video/mp4"> Your browser does not support the video tag. </video>


Previously:

https://www.homemadetools.net/forum/...123#post125959
https://www.homemadetools.net/forum/...514#post205224
https://www.homemadetools.net/forum/...336#post204358
https://www.homemadetools.net/forum/...939#post187149
https://www.homemadetools.net/forum/...902#post190905

Is that really the intention or is it simply a re-branding of "broken sprinkler valve?"

AKA, "Road Ice Attachment Sprinklers.

Is it sea water/salt water for de-icing?

Quote:

---

Originally Posted by bob_3000

Is it sea water/salt water for de-icing?

---

It would almost have to be some kind of harsh brine water otherwise it would just freeze and make the road even worse. I wouldn't want to drive through that stuff though, just imagine how corrosive it would have to be on the vehicles

The road crews in this area (Ohio, USA) use brine to pretreat roads when icing conditions are expected. Some trucks are also equipped to spray brine onto the granular material as it is spread on the roads. Either Calcium or Sodium Chloride is used depending on many factors.

Fresh water freezes at about 32˚f, (0˚c). Sea water typically freezes at about 28.4˚f (-2˚c). I am thinking that sea water would not be an effective ice melting solution, except in a very narrow temperature window. Granular sodium chloride is effective down to 20˚f (-7c), while granular calcium is effective down to -20˚f (-29˚c)

Quote:

---

Originally Posted by hemmjo

The road crews in this area (Ohio, USA) use brine to pretreat roads when icing conditions are expected. Some trucks are also equipped to spray brine onto the granular material as it is spread on the roads. Either Calcium or Sodium Chloride is used depending on many factors.

Fresh water freezes at about 32˚f, (0˚c). Sea water typically freezes at about 28.4˚f (-2˚c). I am thinking that sea water would not be an effective ice melting solution, except in a very narrow temperature window. Granular sodium chloride is effective down to 20˚f (-7c), while granular calcium is effective down to -20˚f (-29˚c)

---

And all of it will rot your vehicle out from under you while you drive. My 2001 F150 came from CT. it barely has enough frame left under it top hold the axles in place

They actually work pretty well and don't ice over for a couple of reasons. First, they are fed with geothermally heated water and don't use any salt, plus the roads in Japan are generally really nice and well drained, so no puddles to freeze to speak of. Second, they are only used for snow removal in areas where they get a lot of snow, but the temps don't get down terribly low. So, the water isn't ever exposed to cold that would freeze it before it drained away. It's all very Japanese.