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What Is A CMU Wall?
CMU Wall stands for Concrete Masonry Units Wall are environmentally green and durable building materials which can be used in many different applications.
They are available in a range of sizes and shapes and can be utilized to create a beautiful exterior designs and also to create interest in interior walls.
CMU blocks utilized in the project could aid in the project's designation as an "green" building.
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CMU Wall Details(CMU Block)
CMU blocks are made of Portland Cement, Aggregates and water. For building materials, CMU blocks provide a number of appealing features to builders and designers and builders, such as the following:
Durable Installation is simple and easy to do Fireproof Low maintenance Decorative finishes available Ornaments after installation CMU Block Dimensions
CMU blocks can be made in various sizes. They can be distinct by their depth, i.e. the depth of the walls they build. For example that the thickness of a CMU that is 6 inches CMU has a nominal thickness of 6'' in depth while a 10" CMU has a nominal thickness of 10'' in depth.
These blocks are also available in half-sizes. They help in decreasing the need to cut blocks near the edges or at the ends of walls.
The architect will always try to build buildings with nominal dimensions closest to the half-block size in order to cut down on the waste and time involved in cutting blocks.
The nominal and real sizes that are available for CMU blocks are listed in the table below. With CMU blocks that are 4 6, 10'' and 12"' are the typical sizes, however some manufacturers also have other sizes that aren't shown below.
Standard CMU Block Wall Detail
CMU producers must adhere the ASTM standards when they manufacture concrete blocks. The standards define the appropriate materials as well as compressive strength dimension tolerance, water absorption, and other characteristics of performance.
Concrete bricks are made of concrete, similar to concrete blocks However, concrete bricks are manufactured in dimensions that correspond to the traditional clay bricks (i.e. 2 2/3'' tall).
The table below outlines the ASTM standards applicable to cement masonry units. ASTM C90 covers most conventional CMU constructions it is also the norm that is referenced by the ICC codes.
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CMU Block Weight
The mass of CMU blocks varies based how dense the mix of cement that is used.
There are three categories of CMU:
1.) Small CMU Blocks: Weight less than 105 lb/ft3.
2.) The weight is medium. CMU Blocks is a weight between 105 and 125 lbs/ft3. Lb/ft.
3) Normal CMU Blocks of weight is a weight greater than 125 pounds per cubic foot.
Lighter CMUs are more affordable need less work in the installation process, and are more likely to possess better fire resistance characteristics.
Larger units can reduce sound transmission, and have greater compressive strengths, and possess a higher thermal storage capacity. However they're more expensive and require more effort to install.
Architects need to provide the CMU weight if a certain weight is needed.
CMU Blocks Compressive Strength
CMU blocks and masonry walls CMU block and wall masonry' compressive strength ranges from around 1,000psi (7 MPa) to 5000 pisi (34 MPa) dependent on the concrete type used in the production of the block, as well as the quality of the mortar employed.
CMU Wall Construction
The majority of walls constructed using CMUs are built using the same components but the way they are applied to these elements may differ in relation to the size or shape and usage that the wall is used for.
Foundation. All CMU walls need to be placed on a solid and sturdy foundation made of concrete. The depth and the size of the foundation will differ based on the dimensions of the block, as well as the amount of weight it will be able to support.
However, in general the foundation's depth must be at a minimum of two times as wide as the wall itself. It should also is about one foot to the line of frost.
CMU block. The choice of block shape and size tends to be based on the purpose of the wall as well as the layout that the wall will have.
The majority of CMU walls use a variety of kinds of blocks, including corner units and stretchers. Mortar joints.
Each joint is joined to adjacent blocks using either the type S or type N (above grade) or type S (below grade) mortar.
For stronger walls, they're constructed in a way as to off (staggered) in one direction to another.
The freestanding walls of Reinforcement are not robust enough to withstand the forces that could crack joints and cause damage to walls. Therefore, both vertical and horizontal reinforcement are common.
The vertical reinforcement is in the shape of straight-length steel bars is embedded in concrete that can be poured in block cavity at intervals that are set by the manufacturer.
Horizontal reinforcement comes in the form of pieces of steel inserted in the mortar wet after each third and fourth block course.
The majority of CMU houses are constructed with single-wythe, which is to say that they are constructed of blocks that are single-wide and placed one on top of one.
If there's an need for a higher structural strength , you can build double-wythe walls. In this, two blocks are laid down.
Also Read: Plumbers Joints
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