lower than 2.6. thick. Lightweight aggregate concrete can be used for casting structural steel to protect it against fire and corrosion. Lightweight aggregates require wetting prior to use to achieve a high degree of saturation. This types of concrete is variously knows, By omitting the fine aggregate from the mix so that a large number of interstitial voids is present; normal weight coarse aggregate is generally used. Both types start with the same base 0.5 water : cement ratio slurry. © 2009-2020 The Constructor. In addition to the reduced dead weight, the lower modulus of elasticity and adequate ductility of lightweight concrete may be advantageous in the seismic design of structures. It can be used for repairing wooden floors of old buildings, carrying walls of low thermal conduction, bridge decks, floating quay, etc. Lightweight Concrete:- Concrete with porous aggregates is now the most commonly used type of lightweight concrete. Filling for floor and roof slabs. For pre-fabricated structures, a smaller crane is required or the same crane can handle larger units due to a reduction in dead weight. Selection of such aggregates has been investig… Structural lightweight concrete can use in piers and beams, slabs and wall elements in steel and concrete frame buildings, parking structures. A chemical aspects of durability is the stability of the material itself, particularly at the presence of moisture. The use of these concrete requires a fair degree of compressive strength, and thus they fall about midway between the structural and low density concrete. Concrete with full structural efficiency contain aggregates which fall on the other end of the scale and which are generally made with expanded shale, clay, slates, slag, and fly-ash. Screeds and thickening for general purposes especially when such screeds or thickening and weight to floors roofs and other structural members. All Rights Reserved. It is used of screeds and thickening. Construction, Work, and Hydropower Dam list, Arch dam| Types of Arch dam, Advantages, and Disadvantages, Culverts:- Types of culverts, compound, Uses, advantages, and disadvantages, 17 Types of Door in building and office and Room, What is Techeomotry? Other products such as air-cooled blast furnace slag are also used. These are sometimes designed as ‘fill’ concrete. Structural lightweight concrete is a concrete aggregate obtained replacing in whole or in part the ordinary aggregate with an artificial lightweight aggregate formed by expanded clay. © Copy right 2017-2020 civilknowledges.com, Lightweight concrete: Types, Properties, and Uses, Advantages, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on LinkedIn (Opens in new window), Click to share on Pinterest (Opens in new window), Click to share on Telegram (Opens in new window), Click to share on WhatsApp (Opens in new window), Click to share on Reddit (Opens in new window), Click to share on Tumblr (Opens in new window), Click to share on Pocket (Opens in new window), Click to share on Skype (Opens in new window), Lightweight concrete: Types, Properties and Uses, What is Clinker Block? Regular concrete can typically withstand a pressure from about 10 MPa (1450 psi) to 40 MPa (5800 psi), with lighter duty uses such as blinding concrete having a much lower MPa rating than structural concrete. Sound insulation in cellular concrete is normally not as good as in dense concrete. Chemical attack is as aggregate ground-water particularly sulfate, polluted air, and spillage of reactive liquids LWC has no special resistant to these agencies: indeed, it is generally move porous than the ordinary Portland cement. When the floor or roofs require thickening or smoothness it can be used to achieve it easily. These vary from lightweight aggregate concrete, foamed concrete, or Autoclaved Aerated Concrete (AAC). It is used for the protection of fire and corrosion. The strength of such concrete is, however, less, but still, it is adequate to be used for precast concrete and reinforced concrete units. Covering for architectural purposes. Its density does not exceed 180 kN/m² because of the use of light and porous aggregate. The system, 2 methods, and Calculation. NAAC is lighter then conventional concrete. Light concrete is made of lightweight aggregate, it is also called foam concrete. Although the strength of no-fines concrete is considerably lower than that of normal-weight concrete, this strength, coupled with the lower dead load of the structure, is sufficient in buildings up to about 20 storeys high and in many other applications. Many types of pre-mixed concrete are available which include powdered cement mixed with an aggregate, needing only water. Most building materials such as clay bricks the haulage load is limited not by volume but by weight. The Latermix Cem range of lconcretes can be used for subfloors that are strong and very lightweight (450 – 600 kg/m 3 ) and contribute significantly to the thermal insulation of the slab. We use Aquaerix preformed cellular concrete foam to generate pervious material. Fixing bricks to receive nails from joinery, principally in domestic or domestic type construction. EABASSOC Foamed Concrete is particularly suitable for bridge abutments because it does … Other also advantages of this material are its greater fire resistance, low thermal conductivity, low coefficient of thermal expansion, and lower erection and transports costs for pre-fabricated members. It … Lightweight Aggregate Concrete. How to Select the Right Curing Method for Structural Concrete ... By using porous lightweight aggregate of low apparent specific gravity, i.e. Screeds and walls where timber has to be attached by nailing. Lightweight structural concrete Lightweight aggregate concretes can be used for structural applications, with strengths equivalent to normal weight concrete. Due to its porosity and low alkalinity. Non autoclaved lightweight aerated concrete is a type of lightweight concrete which is used to produce blocks and replace bricks. In this method a porous lightweight aggregate of low Specific Gravity instead of normal aggregate of Specific Gravity 2.6 is used. Autoclaved aerated concrete (AAC) is a lightweight, precast, foam concrete building material suitable for producing concrete masonry unit (CMU) like blocks. The lightest grade suited for insulation proposed while the heavier grades with adequate strength suited for structural applications. Uses of Lightweight Concrete. Uses Of Lightweight Aggregate Concrete. The density of concrete varies from 300 to 1200 kg/m³. These advances encourage the structural use of LWA concrete. The light concrete not only results in saving the dead weight of the structure but has better insulation against heat and sound. Cellular Lightweight Concrete has been long used for slabs and road construction, but getting the industry to look at it as a building block for structural walls has been a challenge. Fire and corrosion protection. Insulation of water pipes. Lightweight concrete, also known as EPScrete (expanded polystyrene concrete), is a material widely used in the building of environmentally "green" homes. Because lightweight concrete is often project-specific, contacting the aggregate supplier before project design is advised to ensure an economical mixture and to establish the available range of density and strength. 2. It can also help in covering architectural … Mechanical damage can result from abrasion or impact excessive loading of flexural members. The use of LWC has sometimes made its possible to proceed with the design which otherwise would have been abandoned because of excessive weight. Although the exact mixture used in a lightweight concrete will affect its total weight, an average square foot of lightweight concrete weighs about 14.5 pounds, whereas traditional concrete weighs 18 pounds. What is Lightweight Concrete? These are also used for the construction of the building blocks. Surface rendered for external walls of small houses. It can be used to screeds and walls where the timber will be attached by nails. There exist, therefore, large pores within the body of the concrete which are responsible for its low strength, but their large size means that no capillary movement of water can take place. The lightweight aggregate that can be used varies from natural pumice aggregate to man-made sintered aggregate such as sintered fly ash (Mindess et al., 2003). Types, Objective, Requirement good Plaster, Fly Ash Concrete, Uses Of Fly Ash, Advantages And Disadvantages, Guniting: Properties, Procedures, Application, Advantages, And Disadvantages, What is hydropower dam? In large building construction this is … What is Lightweight Concrete? The use of lightweight concrete has been widely spread across countries such as USA, United Kingdom and Sweden. Structural lightweight concrete can use in piers and beams, slabs and wall elements in steel and concrete frame buildings, parking structures. The point is illustrated by fact that a 125 mm thick solid wall of aerated concrete will give thermal insulation about four times greater than that of a 230 mm clay brick wall. The substance is often made using small Styrofoam balls as a lightweight aggregate instead of the crushed stone that is used in regular concrete. Lightweight aggregate is relatively new material. The density of aggregate plays a vital role in the strength of lightweight concrete. This concrete saves 15 to 20 % in the cost of construction of floors and roots. The structural lightweight concrete can use for the construction of residential and non-residential buildings in seismic areas. Stephen J. Hayde, a brick manufacturer and ceramic engineer, invented the rotary kiln process of expanding shale, clay, and slate. Concrete is used to construct any structure; the ingredients of the concrete are cement, sand, and aggregates. Screeds and walls where timber has to be attached by nailing. These two reasons are why it is used for lightweight concrete floors, lightweight concrete roofing and lightweight concrete block. The term no-fines concrete generally means concrete composed of cement and a coarse (9-19) aggregates only and the product so formed has many uniformly distributed voids throughout its mass. Uses of Lightweight Concrete: There are the following uses as given below; For decks of long-span bridges, it is used. Lightweight Foamed Concrete Bridge Abutment. It is not recommended for use below damp-course. Aerated, Cellular, Foamed or Gas Concrete . 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