A portable, reusable concrete washout is provided. In a preferred embodiment, the washout is constructed from a series of blocks that can be removably interlocked together and can be easily transported so that the washout may be assembled and disassembled onsite. A plastic sheet or other containment member can be laid over and secured to the washout to hold and contain the mixture of water and concrete as it is washed from the equipment. The blocks are preferably poly-cuboidal in shape and design, whereby the blocks can be stacked and overlap with one another. The blocks further include at least one type of interlocking mechanism for the removable interlocking and attachment of one block to another.

Described is a kit for constructing retaining walls including multiple interconnecting units. Various units are provided including primary retaining wall units, end units, and corner units. Each unit is square or rectangular in shape and includes an interior volume, a lip on an upper end thereof, and a protrusion on a lower end thereof. The units can be stacked on top of one another and can be secured by engagement of the lip of a first unit with the protrusion of a second unit. The units can also be arranged side-by-side and secured to one another using securement posts and fasteners. The units include one or more exterior surfaces having a finished appearance that resembles wood, brick, or stone, among others. Further, each unit includes one or more drainage apertures thereon. In this way, the present invention provides a versatile system for constructing a retaining wall of a desired configuration.

A simulated stone or brick column or retaining wall is made up of rows of masonry blocks of generally trapezoidal configuration arranged in end-to-end relation to one another in each row, each block including a recessed portion being aligned with one another in each row and each block having textured wall surfaces simulating the appearance of brick or stone along one or more wall surfaces arranged in different configurations without the necessity of interlocking the blocks together.

A triangle unit assembly block comprises a body portion comprising mutually facing first and second side surfaces and mutually facing third and fourth side surfaces between a upper surface and a lower surface; a first fastening protrusion formed on the first side surface of the body portion; a second fastening protrusion formed on the second side surface of the body portion; a first fastening groove formed on the third side surface of the body portion; and a second fastening groove formed on the fourth side surface of the body portion, wherein the first and second fastening protrusions are disposed to correspond to each other and protrude in mutually opposite directions, and the first and second fastening grooves are disposed to be misaligned with one another to be concave in mutually facing directions.

A building element for coupling with other building elements to erect a retaining wall. Optionally, the building element can have a modular construction. The building element can have a face panel and a beam member that extends substantially perpendicularly relative to the face panel. The building elements can have a variety of different configurations, providing flexibility in the design of retaining walls. Optionally, each building element can define alignment voids that receive portions of alignment posts for ensuring vertical alignment between adjacent building elements or portions of building elements.

A modular wall block is adapted for being assembled together with a number of other blocks in stacked courses to form a retaining wall. First and second spaced apart formations are located at a rear of the block body and define therebetween a vertical fastener channel. The vertical fastener channel is adapted for receiving a complementary shaped formation of a rearwardly placed embedment block.

A method of forming simulated stone or brick column or a retaining wall is made up of rows of masonry blocks of generally trapezoidal configuration arranged in end-to-end relation to one another in each row, each block including a recessed portion being aligned with one another in each row and each block having textured wall surfaces simulating the appearance of brick or stone along one or more wall surfaces arranged in different configurations without the necessity of interlocking the blocks together.

A concrete building block includes indicators along each end to assist in aligning a pin placed in the block with a channel in a like block in a course below as a wall is being constructed.

A retaining wall block includes a block body having a top side and a bottom side parallel to the top side, each of the top side and the bottom side being trapezoidal in shape and symmetrical with respect to a central vertical plane; a front side and a rear side parallel to the front side; and a right side and a left side opposite the right side. The retaining wall block includes a vertical interlock system having a groove having a groove depth and a groove width and extending transverse to the central vertical plane along the bottom side from the left side to the right side; and a key extending transverse to the central vertical plane along the top side and having a maximum key width that is smaller than or equal to the groove width, the key having a maximum key height that is smaller than or equal to the groove height, wherein the key has a left side portion and a right side portion, and each of the left side portion and the right side portion is shaped to reduce in width toward both the left and right sides of the block.

A retaining wall block includes a block body having a top side and a bottom side parallel to the top side, each of the top side and the bottom side being trapezoidal in shape and symmetrical with respect to a central vertical plane; a front side and a rear side parallel to the front side; and a right side and a left side opposite the right side. The retaining wall block includes a vertical interlock system having a groove having a groove depth and a groove width and extending transverse to the central vertical plane along the bottom side from the left side to the right side; and a key extending transverse to the central vertical plane along the top side and having a maximum key width that is smaller than or equal to the groove width, the key having a maximum key height that is smaller than or equal to the groove height, wherein the key has a left side portion and a right side portion, and each of the left side portion and the right side portion is shaped to reduce in width toward both the left and right sides of the block.