Concrete blocks masonry or concrete masonry units cmu are mainly two type, solid and hollow blocks. Solid blocks have no cavities, or according to us standards have no voids amounting to not more than 25% of the gross crosssectional area. Hollow bricks manufacturing business plan nextwhatbusiness. This research and compilation, highlights the use of different materials that are used for construction of structures ranging from housing complex, bridges and roads to skyscrapers and monuments. Apr 24, 2015 ribbed slab hollow block slab hourdi block different sizes 4. 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. They may be used for both load bearing as well as non load bearing walls. Concrete blocks and pavers mix design and manufacturing.
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. Sep 01, 2015 the materials required for the production of the concrete blocks are aggregates, cement and water. Types of concrete blocks or concrete masonry units. Ideas from cement fountains, flower pots, small fish ponds, all in one idea. Commonly used in the construction industry, concrete hollow blocks are usually manufactured using lightweight. Types of concrete blocks characteristics of different types of blocks. Hollow dense concrete blocks manufactured to bs en 77 available in standard texture hollow dense blocks are perfect for agricultural and commercial applications. 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. The optimum usage of such building materials and their.
A hollow unit is that unit which has core void area greater than 25% of the gross area. Aerated concrete blocks exceptionally high performance blocks with the lowest thermal conductivity of any masonry block available in the uk. Hollow blocks are manufactured from high quality class 2. In hollow bricks manufacturing raw materials are cement, stone chips 0. This vast range of products offers a large market for application. All concrete is made of cement, water and aggregate, rocks varying in size from sand to gravel. The behaviour of hollow concrete block masonry under axial compression.
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. 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. Concrete bricks are systematically piled blocks, rectangular in shape, primarily used to build rigid walls. Proper curing increase compressive strength of the blocks. Most concrete blocks have one or more hollow cavities, and their sides may be cast smooth or with a design. Strong, reinforced walls can be easily constructed quickly and economically. Types of concrete blocks characteristics of different types. Lower density blocks may use industrial wastes, such as fly ash or bottom ash. Both concrete blocks and precast concrete are made by pouring concrete into prepared forms and allowing it to dry or cure.
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. Types of concrete blocks or concrete masonry units in. Pdf experimental research of hollow concrete block masonry. China small manual mobile concrete hollow block making.
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. Dense concrete blocks highly resilient, tough, loadbearing blocks suitable for any application. Types of concrete blocks characteristics of different. The total void area can amount to 50% of the gross crosssectional area. Hollow concrete blocks have one or more hollow cores. Moreover it is also important to see if the edges are proper and sharp in case of exposed use of blocks. Pdf the behaviour of hollow concrete block masonry under axial. Insulite medium density aggregate blocks the perfect, traditional allround.
It is laid with its length parallel to the face of the wall. Besides different sizes and designs can be given to the blocks. Introduction these are the concrete blocks either hollow or solid. Moreover, you can procure the raw material from the nearby districts and from other states. The major differences between each of these types are supplied bellow. They are manufactured to bs en 77 using class 1 limestone aggregates. Types of concrete blocks or concrete masonry units used in construction. 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. Minimum average compressive strengths of blocks shall be as per table. Jul 17, 2017 become familiar with the different types of concrete block and their applications and choose the right kind for your job. Mar 18, 2019 these are different cement based blocksbricks 1. 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.
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. Cement concrete blocks can be solid dense or hollow. Types of concrete blocks or concrete masonry units in construction. Firstly cement, stone chips, sand, etc are mixed in the ratio of 1. Stretcher a stretcher block is the most commonly used block in construction. A concrete block is one of several precast concrete products used in construction. Hollow manufactured to bs en 77 available in standard texture. 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. 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. The aesthetic properties of concrete blocks, once utilitarian and gray, have become more important. Ordinary portland cement is the cementing material used in cement concrete hollow blocks.
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. Aug 11, 2012 other types of concrete hollow blocks concrete hollow blocks capuno, azaleah p. 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. Cemex supplies concrete block to customers with all types. However, the particle size of the coarse aggregate should not exceed one third thickness of the thinnest web of the hollow blocks. View hollow concrete block research papers on academia. 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. Some of the advantages of hollow concrete block construction are reduced mortar consumption, light weight and greater speed of work compared to brick masonry. In load bearing structures low rise residential and office buildings, bungalows, shelter units for rural housing. This hollow concrete block have open or closed cavity and can be used in the construction of loadbearing and nonload bearing partition walls. Insulite medium density aggregate blocks the perfect.
Jul 02, 2018 types of concrete blocks characteristics of different types of blocks. The cement and water make a paste that bonds the aggregates into a solid material. Aerated autoclaved concrete block aac most of the time compared with bricks but is different in a. The concrete block may have a solid or hollow core. Improved sound and heat insulation further enhance this system. Concrete blocks are manufactured in required shape and sizes and these may be solid or hollow blocks. 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 masonry unit cmu is a standard size rectangular block used in building construction. In view of these advantages, hollow concrete blocks are being increasingly used in construction activities.
The latter has cavities that reduce weight, but also offer less. Portland cement and aggregate, usually sand and fine gravel, for highdensity blocks. China small manual mobile concrete hollow block making machine qmr245 contact. The good concrete compacted by high pressure and vibration gives substantial strength to the block. Pdf hollow block masonry materials for construction. Stationary machines that mould blocks, one or more at a time, on pallets. Due to its strength, durability, and excellent fire rating, concrete block provides a sensible alternative to many other building materials. Hollow blocks are the most common type of concrete blocks, having one or more holes that are open at both sides.
The hollow concrete blocks shall conform to following grade. Page 1 of 4 hollow concrete blocks description of item. Depending upon the structure, shape, size and manufacturing processes concrete blocks are. The term precast refers to the fact that the blocks are formed and hardened before they are brought to the job site. Structurally efficient hollow concrete blocks in load bearing masonry. Pdf the behaviour of hollow concrete block masonry under. These are the concrete blocks either hollow or solid. What are the steps in properly laying concrete blocks. In this article we discuss the advantages of concrete blocks walls, types of concrete blocks and the details of construction process. Pdf hollow block masonry materials for construction jade. Concrete blocks brochure 23rd march 2015 riba product selector. The aggregates are selected by considering the weight, texture or. Where hollow block work is specified for work above dampproof course level, the blocks shall have two voids running vertically. Compressive strength 5 8 mpa, highest among its substitutes.
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