Blocks for modular wall construction

A block and peg combination for a modular wall construction comprising:

• a cast block of cementatious material having a front face,
• a rear face,
• two sides with each side extending between an edge of the front face and an edge of the rear face;
• a bottom, and
• a top parallel to the bottom,
• the front face, rear face and two sides being substantially, normal to the bottom and top;
• the front face having a width between the two sides which exceeds the width of the rear face between the two sides whereby the block tapers at the sides from a wide dimension at the front face to a narrower dimension at the rear face;
• the bottom defining at least four spaced-apart holes adjacent the respective sides of the block;
• at least two pegs, each peg having a head portion and a shaft portion;
• the head portion of each peg defining a conical top truncated at its joinder to the shaft portion with the width of the truncated conical top exceeding the width of the shaft portion;
• each shaft portion being configured for forced engagement with each of the at least two spaced-apart holes in the bottom of the block whereby upon insertion of the shaft portion of one of the pegs in one of the holes, the conical top protrudes from the corresponding hole and the truncated conical top abuts the bottom surface of the block, the conical surface protruding away from the bottom to define a V-shaped elevation profile;
• the top surface of the block defining at least two V-shaped grooves having a cross-section configured to snugly receive the V-shaped elevation profile of the head portion of one of the pegs, one of the V-shaped grooves being registered to the respective holes in the bottom of the block, and the other of the V-shaped grooves being offset with respect to respective holes in the bottom of the block;
• the pegs being secured to the bottom of the block at the holes with the shaft portions within the hole and the conical tops protruding from the bottom,
• whereby the conical top at the bottom of a block can register in the V-shaped groove on the top of a like underlying block to thereby snugly key the bottom of an underlying block to the top of an overlying block at the V-shaped groove.

A process of constructing a wall from a plurality of block and peg combination comprising the steps of:

• providing a plurality of cast blocks of cementatious material, each block having a front face,
• a rear face,
• two sides with each side extending between an edge of the front face and an edge of the rear face;
• a bottom, and
• a top parallel to the bottom,
• the front face, rear face and two sides being substantially normal to the bottom and top;
• the front face having a width between the two sides which exceeds the width of the rear face between the two sides whereby the block tapers at the sides from a wide dimension at the front face to a narrower dimension at the rear face;
• forming at least two spaced-apart holes in the bottom adjacent the respective sides of the block;
• providing at least two pegs, each peg having a head portion and a shaft portion;
• the head portion of each peg defining a conical top truncated at its joinder to the shaft portion with the width of the truncated conical top exceeding the width of the shaft portion;
• configuring each shaft portion for forced engagement to each of the at least two spaced-apart holes in the bottom of the block so that upon insertion of the shaft portion of one of the pegs in one of the holes, the conical top protrudes from the corresponding hole and the truncated conical surface abuts the bottom surface of the block, the conical top protruding away from the bottom to define a V-shaped elevation profile;
• forming at least one V-shaped groove in the top having a cross-section to snugly accommodate the V-shaped elevation profile of the head portion of one of the pegs;
• laying a first course of a plurality of blocks having the block tops upwardly exposed in parallel relation with V-shaped grooves of the blocks being also upwardly exposed and respective sides of said blocks being adjacent one another;
• placing the pegs in the holes at the bottom of a second course of a plurality of blocks so that the truncated conical tops of the pegs project from the bottom of the second course of the plurality of blocks;
• and
• accurately positioning the second course of a plurality of blocks on top of the first course of the plurality of blocks by moving each of the blocks of the second course relative to the blocks of the first course until the truncated tops protruding from the bottoms of the blocks placed on top of the first course of blocks register in the V-shaped grooves of the blocks forming the first course of blocks to thereby key the first and second courses of blocks to each other.