Methods for forming noise absorbing barrier walls and related forms

A method for forming a barrier wall, the method comprising:

• positioning a mold in a first orientation, the mold having a rear wall and an encircling sidewall that upstands from the rear wall, the rear wall and the encircling sidewall at least partially bounding a compartment, an upper end of the encircling sidewall at least partially bounding a first access opening to the compartment;
• dispensing a first material into the compartment through the first access opening, at least a portion of the first material being curable;
• securing a front wall over the first access opening;
• rotating the mold over an angle of at least 75° from the first orientation to a second orientation;
• moving a portion of the sidewall of the mold when the mold is in the second orientation to form a second access opening to the compartment;
• and
• dispensing a second material into the compartment, at least a portion of the second material being curable.

A form for forming a barrier wall, the form comprising:

• a mold bounding a compartment having a volume of at least 0.2 cubic meters (m3), the mold comprising a front panel and an opposing rear panel each having an upper end and an opposing lower end that extend between a first side and an opposing second side, the mold further comprising:
• a bottom panel extending between the lower end of the front panel and the rear panel;
• and
• a top panel extending between the upper end of the front panel and the rear panel;
• a stand comprising:
• an upstanding first riser, a first end of the mold being rotatably connected to the first riser;
• and
• an upstanding second riser, a second end of the mold that is opposite the first end being rotatably connected to the second riser,
• a base extending between the first riser and the second riser;
• and
• a rest upwardly extending from the base,
• wherein the mold is rotatably mounted on the stand so that the mold can rotate between a first orientation wherein the mold is in an orientation that is between +/−15° from vertical and a second orientation wherein the mold is in an orientation that is between +/−15° from horizontal, the mold being supported on the rest when the mold is in the second orientation and the mold being spaced apart from the rest when the mold is in the first orientation.