Pdf the behaviour of hollow concrete block masonry under axial. Pdf experimental research of hollow concrete block masonry. Types of concrete blocks or concrete masonry units in construction. All concrete is made of cement, water and aggregate, rocks varying in size from sand to gravel. Pdf hollow block masonry materials for construction. Pdf hollow block masonry materials for construction jade.
China small manual mobile concrete hollow block making. 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. 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. Commonly used in the construction industry, concrete hollow blocks are usually manufactured using lightweight. A hollow unit is that unit which has core void area greater than 25% of the gross area.
Proper curing increase compressive strength of the blocks. Concrete bricks are systematically piled blocks, rectangular in shape, primarily used to build rigid walls. The aesthetic properties of concrete blocks, once utilitarian and gray, have become more important. Types of concrete blocks characteristics of different types of blocks. Types of concrete blocks characteristics of different.
The behaviour of hollow concrete block masonry under axial compression. Concrete blocks masonry or concrete masonry units cmu are mainly two type, solid and hollow blocks. It is laid with its length parallel to the face of the wall. Apr 24, 2015 ribbed slab hollow block slab hourdi block different sizes 4. 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. What are the steps in properly laying concrete blocks. Due to its strength, durability, and excellent fire rating, concrete block provides a sensible alternative to many other building materials. Concrete blocks brochure 23rd march 2015 riba product selector.
Hollow dense concrete blocks manufactured to bs en 77 available in standard texture hollow dense blocks are perfect for agricultural and commercial applications. View hollow concrete block research papers on academia. Some of the advantages of hollow concrete block construction are reduced mortar consumption, light weight and greater speed of work compared to brick masonry. 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. The hollow concrete blocks shall conform to following grade.
Types of concrete blocks characteristics of different types. Types of concrete blocks or concrete masonry units. 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. Pdf the behaviour of hollow concrete block masonry under. 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. Compressive strength 5 8 mpa, highest among its substitutes. 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. Depending upon the structure, shape, size and manufacturing processes concrete blocks are. These are the concrete blocks either hollow or solid. In view of these advantages, hollow concrete blocks are being increasingly used in construction activities.
Low maintenance, color and brilliance of masonry withstands outdoor elements. Hollow bricks manufacturing business plan nextwhatbusiness. A concrete masonry unit cmu is a standard size rectangular block used in building construction. The aggregates are selected by considering the weight, texture or. Insulite medium density aggregate blocks the perfect, traditional allround. The latter has cavities that reduce weight, but also offer less. Hollow manufactured to bs en 77 available in standard texture. Hollow blocks are the most common type of concrete blocks, having one or more holes that are open at both sides. The concrete block may have a solid or hollow core. The test specimens consist of wallettes small walls which built in two types by a hollow concrete blocks. Most concrete blocks have one or more hollow cavities, and their sides may be cast smooth or with a design. Firstly cement, stone chips, sand, etc are mixed in the ratio of 1. Dense concrete blocks highly resilient, tough, loadbearing blocks suitable for any application. Concrete blocks and pavers mix design and manufacturing.
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. However, the particle size of the coarse aggregate should not exceed one third thickness of the thinnest web of the hollow blocks. Mar 18, 2019 these are different cement based blocksbricks 1. A concrete block is one of several precast concrete products used in construction. Hollow blocks are manufactured from high quality class 2.
Aug 11, 2012 other types of concrete hollow blocks concrete hollow blocks capuno, azaleah p. Stretcher a stretcher block is the most commonly used block 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. The term precast refers to the fact that the blocks are formed and hardened before they are brought to the job site. 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. China small manual mobile concrete hollow block making machine qmr245 contact. Moreover, you can procure the raw material from the nearby districts and from other states. Where hollow block work is specified for work above dampproof course level, the blocks shall have two voids running vertically.
Aerated concrete blocks exceptionally high performance blocks with the lowest thermal conductivity of any masonry block available in the uk. They are manufactured to bs en 77 using class 1 limestone aggregates. Jul 17, 2017 become familiar with the different types of concrete block and their applications and choose the right kind for your job. 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. Lower density blocks may use industrial wastes, such as fly ash or bottom ash. Jul 02, 2018 types of concrete blocks characteristics of different types of blocks. In hollow bricks manufacturing raw materials are cement, stone chips 0. Insulite medium density aggregate blocks the perfect. Portland cement and aggregate, usually sand and fine gravel, for highdensity blocks. Minimum average compressive strengths of blocks shall be as per table. This vast range of products offers a large market for application.
Solid blocks have no cavities, or according to us standards have no voids amounting to not more than 25% of the gross crosssectional area. Moreover it is also important to see if the edges are proper and sharp in case of exposed use of blocks. Introduction these are the concrete blocks either hollow or solid. The total void area can amount to 50% of the gross crosssectional area. The major differences between each of these types are supplied bellow. Structurally efficient hollow concrete blocks in load bearing masonry. 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. Stationary machines that mould blocks, one or more at a time, on pallets.
Besides different sizes and designs can be given to the blocks. Hollow concrete blocks have one or more hollow cores. The optimum usage of such building materials and their. Types of concrete blocks or concrete masonry units used in construction. They may be used for both load bearing as well as non load bearing walls. 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.
The good concrete compacted by high pressure and vibration gives substantial strength to the block. 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. Ordinary portland cement is the cementing material used in cement concrete hollow blocks. This hollow concrete block have open or closed cavity and can be used in the construction of loadbearing and nonload bearing partition walls. Aerated autoclaved concrete block aac most of the time compared with bricks but is different in a. 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. Types of concrete blocks or concrete masonry units in. In this article we discuss the advantages of concrete blocks walls, types of concrete blocks and the details of construction process. Cement concrete blocks can be solid dense or hollow. Find your hollow concrete block easily amongst the 156 products from the leading brands lafarge, verniprens. Page 1 of 4 hollow concrete blocks description of item. Strong, reinforced walls can be easily constructed quickly and economically. Both concrete blocks and precast concrete are made by pouring concrete into prepared forms and allowing it to dry or cure.
Ideas from cement fountains, flower pots, small fish ponds, all in one idea. The cement and water make a paste that bonds the aggregates into a solid material. Standard concrete block, or gray block, is widely known as one of the most practical, longlasting and costeffective material used in building. Cemex supplies concrete block to customers with all types.