Concrete inFocus - Spring 2013 - (Page 8)

Figure 1. An Archer Auto-Mixer on a Ford Model T Chassis. The side charging platform is raised for travel. equipment A LEGACY in Concrete Looking at Early Transit Mixers Thomas Berry | Illustrations from the HCEA Archives W hile I cannot verify the assertion that, as stated on, “The first load of ready mix was delivered in Baltimore, Maryland in 1913,” and although documentation available on the development of transit mixers is at best sketchy, here is an overview of several representative manufacturers and designs from the early and mid-1900s. The manufacturers are presented alphabetically. Archer Iron Works Archer Iron Works of Chicago, a manufacturer of concrete mixers and placing towers, developed an early transit mixer for use on Ford motor vehicles. According to Archer sales literature, the concept “solves at once two of the contractor’s most important mixer problems—(1) quick transportation of mixer equipment; (2) dependable power for operation.” Archer also produced a power takeoff for the mixer that was bolted over the head of the vehicle’s engine. Figure 2. The Archer Speed-Mixer, on a Ford one-ton truck chassis, is ready to roll. Figure 3. Charging an Archer Speed-Mixer. Figure 5. The Blaw-Knox Trukmixer was designed to be adapted to other applications. Th is one is mounted on a narrow-gauge flatcar to deliver ready-mixed concrete for lining a tunnel. Figure 4. These 2-1/2 yard Blaw-Knox Trukmixers, owned by Concrete Supply Company Inc. of Evansville, In., are mounted on Autocar carriers. 8 ı SPRING 2013

Table of Contents for the Digital Edition of Concrete inFocus - Spring 2013

Corporate Suite
Enviro Scene
A Legacy in Construction
CalPortland Slip Form Success
Fly Ash FAQ
Acceptance Test Reports for Ready Mixed Concrete
First Batch Plant Certifications in Mongolia
Index of Advertisers
Taking It to the Streets
Impact of Specifications on Concrete Quality

Concrete inFocus - Spring 2013