Cement mixers have a history of suddenly stopping their rotation if a load of cement is not blended right. When they do they'll roll over, even whilest stopped at a traffic light. This happened some years ago in Garland, TX, instantly killing the lady in a car in the adjacent lane. My question, is this taken into account when programming the rotation? I assume one direction is for mixing or traveling and the other is for emptying. If the rollover is planned, Then it would make sense that British cement mixers would be made differently? Does anyone know which way they rotate? Here, the full loads rotate clockwise viewing from the rear.
Safety - 2 Answers
People's Answers, Critics, Comments, Opinions :
Answer 1 :
I don't think there is a safe direction to roll in so I think the designers of cement trucks would just try to prevent it from happening rather than trying to get the truck to roll in the safer direction.
Answer 2 :
The direction of rotation depends upon the design of the mixer, not where it's used. The inside of a cement mixer is a cork screw shape -- one direction mixes the contents and the other empties it. A properly designed system won't rotate if the mix "goes hard" so there must have been something seriously wrong with that mixer in Garland. And a mix doesn't suddenly "go hard", it takes time to start to set.
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