by 
gone
ANSWERS: 4
-
That's tar. It's used like glue to fill gaps and cracks in concrete. You see it on roads and sidewalks. It's cheaper than replacing the whole thing. Sort of like a quick patch.
-
nice i always thought they were like old chewing gum...oops i meant this as a comment, they need to separate the buttons more
-
the black spots your seeing is the stone that is in the concrete. over time the top of the finished concrete wears away and you see the stone it just happens that some of the stone is black and that is what I think you are seeing
-
Those black spots are GUM that people spit out on the sidewalk! Gross, huh? http://evildiscussor.blogspot.com/2006/08/dear-evil-discussor-did-you-know-there.html http://www.gumbusters.com/about.html http://www.engadget.com/2005/12/14/gumspots-positioning-system/ http://www.gumbustersny.com/news.htm http://www.discovervancouver.com/forum/topic.asp?TOPIC_ID=99703 http://www.washingtonpost.com/ac2/wp-dyn/A17509-2003Nov27?language=printer
RELATED QUESTIONS
Copyright 2023, Wired Ivy, LLC