Lower density blocks may use industrial wastessuch as fly ash or bottom ashas an aggregate. Block cores are typically tapered so that the top surface of the block as laid has a greater surface on which to spread a mortar bed and for easier handling.
Blocks come in many sizes. For this reason, high seismic zones typically only allow fully grouted walls in their building codes.
Structural properties[ edit ] Concrete masonry can be used as a structural element in addition to being used as an architectural element.
Sizes and structure[ edit ] Concrete blocks may be produced with hollow centers cores to reduce weight or improve insulation. Walls may be ungrouted, partially grouted, and fully grouted. Reinforcement is primarily used to impart greater tensile strength to the assembly, improving its ability to resist lateral forces such as wind load and seismic forces.
Blocks with grooved ends permit the construction of control jointsallowing a filler material to be anchored between the un-mortared block ends.
Reinforcement bars can be used both vertically and horizontally inside the CMU to strengthen the wall and results in better structural performance. Blocks with a channel on the end, known as "jamb blocks", allow doors to be secured to wall assemblies. Special textures may be produced by splitting a ribbed or solid two-block unit; such factory-produced units are called "split-rib" or "split-face" blocks.
U-shaped blocks or knockout blocks with notches to allow the construction of bond beams or lintel assemblies, using horizontal reinforcing grouted into place in the cavity.
American suburban houses typically employ a concrete foundation and slab with a concrete block wall on the perimeter. Portland cement and aggregateusually sand and fine gravelfor high-density blocks. A core also allows for the insertion of steel reinforcement, tying individual blocks together in the assembly, with the goal of greatly increased strength.
To hold the reinforcement in proper position and to bond the block to the reinforcement, the cores must be filled with grout concrete. Concrete blocks are made from cast concrete e.
Other features, such as radiused corners known as " bullnoses " may be incorporated. The cells in which the rebar is placed must be grouted for the bars to bond to the wall. The use of blockwork allows structures to be built in the traditional masonry style with layers or courses of staggered blocks.
A wide variety of decorative profiles also exist.Hollow Blocks are Micro Blocks which are hollow in the center of the block. Stone Anticovers and Jacketed Wire/Cable/Bluewire.
HOLLOW BLOCKS: Hollow Block 12" ( X X ) Weight (kg): Hollow Block 10" ( X X ) Weight (kg): Hollow Block 8" ( X X ). View the profiles of people named Hollow Block. Join Facebook to connect with Hollow Block and others you may know.
Facebook gives people the power to. 1) a hollow-block wall is as strong as its weakest link which is a hollow-block; 2) a hollow-block wall needs plaster. Take a close look at any outside-wall at any building here in the Philippines; the plaster cracks and lets water through to the steel bars in the hollow-blocks; rust = misery.
Hydraulic Hollow Block Making Machine: the hydraulic block making machine forms the bricks relying on the hydraulic transmission, and it has features of low noise, high production output, and extensive applications. The bricks made by the hydraulic type machine has high compactness.
Project: Blue Water Island Wharf Retail. Consultant: MERAAS / MIRAGE/ WSP Consultant Contractor: ALEC-Al Jaber L.E.G.T Engr.
& Cont. L.L.C.Download