|Part 2--Construct a Concrete-Block Wall|
FIRST COURSE OF CONCRETE BLOCKS
Before mixing mortar and laying blocks, you should follow these steps:
2-9. Spreading the Mortar Bed. Spread a full bed of mortar, and furrow it with a trowel. This will ensure that plenty of mortar is on the bottom of the blocks for the first course (Figure 2-6).
Lay the corner block first and carefully position it. Be sure to lay all blocks with the thicker side of the face shell up to provide a larger mortar bedding area (Figure 2-7).
2-10. Making Vertical Joints. Apply mortar to the ends of the blocks for vertical joints. You can save time by placing several blocks on the ends and applying mortar to the vertical faces in one operation (Figure 2-8). Then place each block over its final position and push downward into the mortar bed and against the previously laid block to obtain a well-filled vertical joint (Figure 2-9).
2-11. Aligning, Leveling, and Plumbing. Lay the first course of blocks with great care to ensure that they are properly aligned, leveled, and plumbed. This will make the next course of blocks and the wall itself straight and true. After you have laid three or four blocks, use the mason's level as a straightedge to ensure correct alignment of the blocks. Check the first course of blocks carefully with the level, bringing them to the proper grade. Plumb the blocks by tapping them with the trowel handle (Figure 2-10).
|David L. Heiserman, Editor||
Copyright © SweetHaven
Revised: June 06, 2015