Re: The History of Shipping Bulk Cement


Prior to the bulk loading of cement, it was shipped in bags in box cars. Many of this countries transcontinental highways, built in the 1920s were built this way. 

In the 1935-1937 is when dedicated fleet of covered hoppers and cement bulk containers started showing up. NE Pennsylvania was the starting area. These dedicated cars had steep slope sheet - about 80 degrees - that provided easier self unloading of the dense cement. A retrofitted coal hopper - with 120 degree slope sheets - did not self unload very well. Much cement needed to be either vibrated out or manually assisted out of the cars.  This why the retro cars did not catch on. The RRs bought the dedicated covered hoppers. 

Distance shipped - every ton mile costs money. The closest suitable product will be the cheapest. You would only buy a premium product if you needed a premium product, but even then the closest will likely be the cheapest. 

Mark Landgraf
Albany NY

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From: jimbetz jimbetz@... [STMFC]
Sent: Thursday, March 3, 2016 2:03 PM
To: STMFC@...
Reply To: STMFC@...
Subject: [STMFC] The History of Shipping Bulk Cement


Hi all,

This thread was born as "Covered Hoppers - for Cement".

Although there have been a few posts on the referenced thread
this part of my question has gone essentially unanswered ...

What I'm looking for is the kind of -general- historical information
that covers questions such as

1) When were cement hoppers commonly in use (as opposed
to the earliest experiments - which I know about )?

2) Was I wrong in my general statements about how far -most-
bulk cement was moved in covered hoppers?

All - I am not talking about concrete - I'm interested in the
bulk cement hauls (before, during, and after the transition to
using 'dedicated service' covered hoppers).
At least one thing I learned from the prior thread was about
the use of "bulk containers in gons" in the early days. Thanks
for that detail/piece of information.
- Jim B.

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