Concrete block manufacturers now produce concrete blocks in a wide range of colors, textures and finishes that architects utilize to great effect, depending on the building design. A concrete block is one of several precast concrete products used in construction. Hollow concrete blocks can be used for a exterior load bearing walls, b interior walls, c panel walls, d columns, e retaining walls and f compound walls. Apr 24, 2015 ribbed slab hollow block slab hourdi block different sizes 4. The electrical slab boxes, which are the same size as the concrete slab blocks, allow for down lighters anywhere in the slab and the electrical conduits to be positioned correctly. Concrete blocks masonry or concrete masonry units cmu are mainly two type, solid and hollow blocks. View hollow concrete block research papers on academia. Dense concrete blocks highly resilient, tough, loadbearing blocks suitable for any application. Moreover it is also important to see if the edges are proper and sharp in case of exposed use of blocks.
Cemex supplies concrete block to customers with all types. Improved sound and heat insulation further enhance this system. This hollow concrete block have open or closed cavity and can be used in the construction of loadbearing and nonload bearing partition walls. Standard concrete block, or gray block, is widely known as one of the most practical, longlasting and costeffective material used in building. Low maintenance, color and brilliance of masonry withstands outdoor elements. Concrete blocks are manufactured in required shape and sizes and these may be solid or hollow blocks. Hollow concrete block is an important addition to the types of masonry units available to the builder and its use for masonry is a constantly increases. Types of concrete blocks or concrete masonry units in.
Sep 29, 2015 before laying of the concrete blocks its necessary to plan and know the number of blocks to be used and how they will be placed. Types of concrete blocks characteristics of different types of blocks. Aerated autoclaved concrete block aac most of the time compared with bricks but is different in a. Commonly used in the construction industry, concrete hollow blocks are usually manufactured using lightweight.
Firstly cement, stone chips, sand, etc are mixed in the ratio of 1. Pdf the behaviour of hollow concrete block masonry under. Ordinary portland cement is the cementing material used in cement concrete hollow blocks. This vast range of products offers a large market for application. Aerated concrete blocks exceptionally high performance blocks with the lowest thermal conductivity of any masonry block available in the uk.
Hollow manufactured to bs en 77 available in standard texture. All concrete is made of cement, water and aggregate, rocks varying in size from sand to gravel. Cmus are some of the most versatile building products available because of the wide variety of appearances that can be achieved using concrete masonry units. Most concrete blocks have one or more hollow cavities, and their sides may be cast smooth or with a design.
Portland cement and aggregate, usually sand and fine gravel, for highdensity blocks. The aggregates are selected by considering the weight, texture or. Stationary machines that mould blocks, one or more at a time, on pallets. Strong, reinforced walls can be easily constructed quickly and economically. Sep 01, 2015 the materials required for the production of the concrete blocks are aggregates, cement and water. Types of concrete blocks characteristics of different. Hollow concrete block is an important addition to the types of masonry units available to the builder and its use for masonry work is on constant increase in this country.
The total void area can amount to 50% of the gross crosssectional area. They may be used for both load bearing as well as non load bearing walls. Structurally efficient hollow concrete blocks in load bearing masonry. The term precast refers to the fact that the blocks are formed and hardened before they are brought to the job site. Solid blocks have no cavities, or according to us standards have no voids amounting to not more than 25% of the gross crosssectional area. A hollow unit is that unit which has core void area greater than 25% of the gross area. Standard corefill block the standard, corefill block, also called a stretcher block or cinder block, is the most common type of block used to make partition, retaining and structural walls. Besides different sizes and designs can be given to the blocks. Hollow bricks manufacturing business plan nextwhatbusiness. It is laid with its length parallel to the face of the wall. Blocksm3 20 series 125 blocksm3 25 series 85 blocksm3 hotbloc 25 series 165 blocksm3 useful estimating data for hollow masonry blockfill volume units per square metre mortar mix specifications dricon bagged mortar is recommended for quality control to ensure compliance with the code. Where hollow block work is specified for work above dampproof course level, the blocks shall have two voids running vertically.
China small manual mobile concrete hollow block making. The good concrete compacted by high pressure and vibration gives substantial strength to the block. Insulite medium density aggregate blocks the perfect. These are the concrete blocks either hollow or solid. Cement concrete blocks can be solid dense or hollow. Pdf experimental research of hollow concrete block masonry. Concrete bricks are systematically piled blocks, rectangular in shape, primarily used to build rigid walls. The cement and water make a paste that bonds the aggregates into a solid material. Stretcher a stretcher block is the most commonly used block in construction. The aesthetic properties of concrete blocks, once utilitarian and gray, have become more important.
Types of concrete blocks or concrete masonry units used in construction. Due to its strength, durability, and excellent fire rating, concrete block provides a sensible alternative to many other building materials. China small manual mobile concrete hollow block making machine qmr245 contact. Hollow concrete blocks have one or more hollow cores. Types of concrete blocks or concrete masonry units used in construction concrete block masonry which is also known as concrete masonry unit cmu have advantages over brick and stone masonry. A wide variety of types of hollow blocks options are available to you, such as hollow block making machine, interlock block making machine, and curbstone block machine. Hollow blocks are manufactured from high quality class 2. In view of these advantages, hollow concrete blocks are being increasingly used in construction activities. The optimum usage of such building materials and their. A concrete masonry unit cmu is a standard size rectangular block used in building construction.
The behaviour of hollow concrete block masonry under axial compression. The concrete block may have a solid or hollow core. Hollow blocks are the most common type of concrete blocks, having one or more holes that are open at both sides. Moreover, you can procure the raw material from the nearby districts and from other states. Page 1 of 4 hollow concrete blocks description of item. Jul 17, 2017 become familiar with the different types of concrete block and their applications and choose the right kind for your job.
In hollow bricks manufacturing raw materials are cement, stone chips 0. The major differences between each of these types are supplied bellow. The latter has cavities that reduce weight, but also offer less. Find your hollow concrete block easily amongst the 156 products from the leading brands lafarge, verniprens. The test specimens consist of wallettes small walls which built in two types by a hollow concrete blocks. In this study, it is demonstrated that the wall to block strength ratio consider ably vary with different shapes of blocks and types of mortar bedding. Introduction these are the concrete blocks either hollow or solid. Concrete blocks and pavers mix design and manufacturing. Types of concrete blocks or concrete masonry units. Jul 02, 2018 types of concrete blocks characteristics of different types of blocks. Depending upon the structure, shape, size and manufacturing processes concrete blocks are.
Ideas from cement fountains, flower pots, small fish ponds, all in one idea. Pdf the behaviour of hollow concrete block masonry under axial. Compressive strength 5 8 mpa, highest among its substitutes. Proper curing increase compressive strength of the blocks. Both concrete blocks and precast concrete are made by pouring concrete into prepared forms and allowing it to dry or cure. Some of the advantages of hollow concrete block construction are reduced mortar consumption, light weight and greater speed of work compared to brick masonry. Pdf hollow block masonry materials for construction. Minimum average compressive strengths of blocks shall be as per table.
Hollow dense concrete blocks manufactured to bs en 77 available in standard texture hollow dense blocks are perfect for agricultural and commercial applications. Lower density blocks may use industrial wastes, such as fly ash or bottom ash. What are the steps in properly laying concrete blocks. They are manufactured to bs en 77 using class 1 limestone aggregates. The aggregates of various types have been used with varying degree of success and they include crushed stones, gravel, volcanic cinders, foamed slag, furnace clinker, etc. Types of concrete blocks or concrete masonry units in construction. Blocks shall be of work size 190 mm high, 390 mm long and 290 mm190 mm140 mm 90 mm thick, and shall be solid unless detailed otherwise. In load bearing structures low rise residential and office buildings, bungalows, shelter units for rural housing. Insulite medium density aggregate blocks the perfect, traditional allround. The hollow concrete blocks shall conform to following grade. Pdf hollow block masonry materials for construction jade.
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