| 词条 | CMI Roadbuilding / Autograde |
| 释义 |
CMI Roadbuilding, Inc. of Oklahoma City began in 1961, when engineers headed by Bill Swisher started looking for new methods in the road building industry. Little had changed since the early 1900s in the methods of building roads, however, labour costs were skyrocketing and inflation meant taxpayers dollars were buying less and less. In the same period Society was becoming increasingly more mobile creating demand for better roads and highways. The CMI group believed that many road failures were due to poor riding surface which was mainly caused by inaccuracies in the subgrade. AutogradeA machine was developed that could economically implement an Automated Profile Road Building Method and would be known as the Autograde. This machine was known as either a “trimmer-spreader” or a fine-grader. It could trim or cut off high spots of a road bed and then spread the soil across the entire width of the road profile. By its very nature it was fine-grading the base course of the new road. The Autograde used an auger with cutting teeth to perform this function. FeaturesThe Autograde could be adapted to perform many tasks including:
Using the auger with cutting teeth, it could fine grade the road bed
Using the auger and a conveyor belt to pick up excess material and deposit it in a truck
Using the auger and screed to place and level asphalt on the road
Using the auger and screed to place and form a concrete slab AdvantagesThis one machine could do the same work as numerous other pieces of machinery, only more quickly and more accurately. AcquisitionsCMI acquired two concrete batch plant manufacturers, Ross Co. in Texas and C.S. Johnson in Illinois.[1] Further developmentsCMI Went on to develop other equipment and was purchased by Terex in 2001.[2] Websitecmi-roadbuilding.comReferences1. ^http://www.concreteproducts.com/index.php/equipment/plantequipment/5221.html 2. ^http://www.terexrb.com/content.aspx?pgID=43
4 : Road construction|Engineering companies of the United States|Construction equipment manufacturers|Companies based in Oklahoma City |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。