A method of slip forming a concrete structure can include using a first slip form mold that travels along a path to form a portion of a concrete structure by delivering a first flow of concrete into the first mold through a first hopper. The first hopper can be configured to receive the first flow of concrete. The portion of the concrete structure can be modified using a second slip form mold different from the first mold by advancing the second mold along the concrete structure and, while advancing the second mold, delivering a second flow of concrete into the second mold through a second hopper that is configured to receive the second flow of concrete.

A structural barrier and energy absorbing device comprising a plurality of structural elements is provided. The structural element alone or in a plurality may serve as a traversal impediment or energy absorbing device, such as a pedestrian barrier, vehicular barrier, anti-tank obstacle, ballistic barrier, or the like. The structural element may be a tetrapod such that it comprises an element body having four extension portions that extend outwardly from the interior center to a distal end, such that the structural element maintains an identical orientation and a low center of gravity in each of four resting positions. The structural element may be a solid-state structural element comprised of a particular material or a portable and collapsible structural element wherein the element body comprises an outer skin defining an interior void space, such that during set-up or installation the interior void space may be filled with a filler substance onsite.

Certain exemplary embodiments can provide a system, machine, device, and/or manufacture comprising a traffic separating median barrier comprising: a barrier body having a substantially uniform cross section along a longitudinally extending direction, said barrier body defining a body length extending along said longitudinally extending direction, a body width orthogonal to said body length, and a body height orthogonal to said body length and said body width, said barrier body terminating in a first barrier end region and a second barrier end region, said first barrier end region comprising a female interlocking structure attached to said barrier body, said second barrier end region comprising a male interlocking structure attached to said barrier body, said female interlocking structure adapted to interlock with said male interlocking structure.

Systems and methods for the continuous slip form construction of concrete barriers over support cages. A tube feeder of a slip form construction system can include angled tubes that can direct reinforcing bars into a concrete barrier and also provide space between the tubes for insertion of a support cage through the system and into the concrete barrier.

A surface mount security barrier includes a non-metallic matrix supporting and substantially encapsulating metal ballast. The security barrier has a mass in excess of 6 tonnes and a ratio of metal ballast to non-metallic matrix in excess of 1.5:1 by mass. A method of manufacturing such a security barrier is also provided.

A security barrier includes a plurality of barrier islands. Each barrier island has a concrete crash block having at least one pair of opposing side faces and external fixing elements on the opposing side faces. Attachments, which may be flexible attachments, extend between the external fixing elements of adjacent barrier islands of the security barrier. Each barrier island also has one or more load transfer element within the concrete crash block and, under load, the load transfer elements transfer load from the external fixing elements on one side of the concrete crash block to the external fixing elements on the opposing side of the concrete crash block.

An elongate barrier (3) comprises an outer shell in an elongate lower section of the barrier that defines a cavity (11) that receives and contains a pourable settable ballast material when the barrier is being manufactured. The barrier also comprises a solid block (15) of a ballast material in the cavity formed from the pourable settable ballast material.

The invention relates to a composition having plasma-treated recycled steel fibers within the matrix.

The invention relates to a composition having plasma-treated recycled steel fibers within the matrix.

Certain exemplary embodiments can provide a pre-cast reinforced concrete traffic separating median barrier comprising: a barrier body, said barrier body defining a body length extending along said longitudinally extending direction, a body width orthogonal to said body length, and a body height orthogonal to said body length and said body width, said barrier body terminating in a first barrier end region and a second barrier end region, said first barrier end region comprising a female interlocking structure attached to said barrier body, said second barrier end region comprising a male interlocking structure attached to said barrier body, said female interlocking structure adapted to interlock with said male interlocking structure.