Understanding different types of lightweight concrete by jason spangler the use of lightweight concrete dates back to as early as the eighteenth century, and as advances in building and construction technology have increased, so has the use of lightweight concrete as the benefits of lighter dead load concrete have become apparent. Lightweight concrete alliance construction materials ltd. Lightweight concrete can be specified using the notation lc for the strength class, e. This code contains tables and graphs to serve as a guide in the process. Nearly all fct tests on all three girder mixes gave splitting ratios that were greater figure 1. The wcm ratio of structural lightweight concrete cannot be precisely determined because of the difficulty in determining the absorption of lightweight aggregate. Lightweight concrete is a highly workable, low density material but higher strength mix. Applications of structural lightweight concrete concrete. Introduction the cellular lightweight concrete clc or sometimes might often call that foamed concrete is either a cement paste or mortar, classified as lightweight concrete, in which air voids are entrapped in mortar by suitable foaming agent. The low density of light weight concrete makes it possible to design loadbearing building parts with slimmer dimensions. The values for insulation materials are around 75 times smaller than for regular concrete, which shows that the heat flux and the amount of absorbed heat is lower.
Download lightweight concrete seminar reports, abstract. The sound absorption coefficient of the lightweight concrete is nearly twice than that of. Also, it focuses on the materials used to obtain lightweight concrete. Light weight concrete has a surprisingly long history and was first patented in 1923, mainly for use as an insulation material. Aerated concrete is a lightweight, cellular material consisting of cement andor lime and sand or other silicious material. Aci 2r14 guide for structural lightweightaggregate. Departmentofcommerce nationalbureauofstandards nationalengineeringlaboratory centerforbuildingtechnology. Density, equilibriumas defined in astm 567, it is the density reached by structural lightweight concrete low density after exposure to relative humidity of.
Cellular lightweight concrete materials, applications and. Pdf development of lightweight concrete for structural. The lightweight concrete density is less because lightweight coarse aggregates and sometimes lightweight fine aggregates are used, which make the concrete weigh less. Equations for mix design of structural lightweight concrete 3 guide the mix designer, it is thought worthwhile to add more values to these data for convenience of the users. Pres 8 design related issues with lightweight concrete.
Also explore the seminar topics paper on cellular lightweight concrete with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year civil engineering ce or ieee civil construction btech, be, mtech students for the year 2017. It is possible that a similar factor might be used in building code. This concrete is also often used for countertops and rooftop decks, where a lighter weight is more important than a higher strength. From an ecological, social and cultural perspective lightweight structures have never been more contemporary and necessary than today. Structural lightweight concrete has been widely used following advances in production technology. Its good thermal insulation properties make lightweight concrete suitable for subscreeds, make up of levels and as infill materials of walls. It is made by either a physical or a chemical process during which either air or gas is introduced into a slurry, which generally contains no coarse material.
Lightweight concrete produced using a twostage casting process. Ordinary portland cement, manufactured by the israeli company nesher with fly ash of up to 10 % of cement weight, and conforms to. The lighter the concrete, the greater are the differences to be accounted for in the properties of the concrete. Concrete technology cellular lightweight concrete materials, applications and advantages cellular lightweight concrete clc also known as foamed concrete is one of the most significant type of concrete used for construction purposes due to its various advantages and usages over traditionally produced concrete. Pdf the lightweight concrete has many advantages as compared to conventional concrete. Lightweight concrete what is lightweight concrete and. Aci 2r14 guide for structural lightweight aggregate concrete author. Pdf a novel material for lightweight concrete production. Pdf lightweight concretes are widely accepted in the construction industry mainly due to its low density. C567 c567m19 standard test method for determining density of structural lightweight concrete ovendry density drying ovens structural materials.
Lightweight concrete can be considered as an improved traditional building product. Explore cellular lightweight concrete with free download of seminar report and ppt in pdf and doc format. Building code requirements for structural concrete aci 318 currently employs a factor to a number of its equations for the design of lightweight concrete in order to account for the material differences of lightweight and normal weight concrete. The standard industrial classification sic code for lightweight aggregate manufacturing is 3295. A novel material for lightweight concrete production. Polystyrene light weight concrete nonstructural specified by density lowest density 450kgm3 35mpa cement type 100% opc where available aggregate size. However, the values for metals are again much higher.
This paper focuses on structural lightweight concrete lc based on mineral lightweight aggregate. During the curing process as an aquagel loses moisture, it shrinks and eventually dries up to form a dried bead or particle that is a fraction of the size of the original aquagel in the cell or pore in the concrete. Polystyrene lightweight concrete polyconcrete zaher kuhail. Cip 36 structural lightweight concrete what is structural lightweight concrete structural lightweight concrete has an equilibrium density ranging from 90 to 120 lbft3 31440 to 1840 kgm compared to normalweight concrete with a density in the. Advantages and disadvantages of lightweight concrete. Lightweight aggregate stockpiles with continuous sprinklers. Pdf generating a structural lightweight concrete researchgate. Mean concrete properties from tests on 4 by 8inch 102 by 203mm cylinders. The sound absorption of lightweight concrete is good because of the fact that the airborne sound energy is converted into heat in the minute channels of the concrete. Lightweight concrete and aggregates, significance of tests and properties of concrete and concretemaking materials, astm. Analysis of construction experience of using lightweight cellular concrete as a subbase material by sergey averyanov a thesis presented to the university of waterloo. It has significant applications on the structure, the.
Lightweight aggregate concrete can be produced using a variety of lightweight aggregates. Lightweight aggregate an overview sciencedirect topics. Equations for mix design of structural lightweight concrete. Heavyweight concrete has a much higher thermal effusivity than ultra lightweight concrete. Definition concrete which uses lightweight aggregates may consist of lightweight aggregates are used in ordinary concrete of coarse aggregate and sand, clay, foamed slag, clinker, crushed stone, aggregates of organic and inorganic. Lightweight concrete is durable and is enormously useful for repairing and refurbishing ageing infrastructure. Analysis of construction experience of using lightweight. Most lightweight aggregate is produced from materials such as clay, shale, or slate. Lightweight concrete concrete containing lightweight aggregate conforming to aashto m 195 and having an equilibrium density not exceeding 0. Cellular lightweight concrete containing pozzolan materials. A structural lightweight concrete mix has a density of about 105 pounds per cubic foot compared to normal concrete with a density of 150 pounds per cubic foot. Lightweight aggregates used in structural lightweight concrete are typically expanded shale, clay or slate escs materials that have been fired in a rotary kiln to.
Paper open access lightweight foamed concrete with. Researchers have supported the need to present mix design data in form of graphs or equations hover, 1995. Lightweight structures are material efficient because the materials. Its thermal insulation properties make it the ideal building material for new construction and the restoration of old buildings. Cellular lightweight concrete seminar report, ppt, pdf. Lightweight foamed concrete with foam agent addition tongwei liu1, guopu shi1, guozhong li1 and zhi wang1, 1school of material science and engineering, university of jinan, jinan, china corresponding author email. Learn more about the advantages and disadvantages of lightweight concrete. Lightweight concrete without natural sand is termed all. Understanding different types of lightweight concrete. Lightweight concrete mixture is made with a lightweight coarse aggregate. In the usa the first bridge made using lightweight concrete was built about 1922 and since then many bridges have been successfully constructed with this material 9. Lightweight aggregate used in the structural lightweight concrete are typically expanded shale, clay, or slate materials that have been fired in a. For mix design of structural lightweight concrete, standard practice for selecting proportions for structural lightweight concrete aci 211. These products, although both are lightweight have several important differences and these must be noted before ordering.
1244 1508 488 718 197 1237 342 1260 112 200 1056 467 558 419 525 862 805 987 552 432 534 172 1238 1433 1512 1323 1541 1264 1040 144 1495 269 1073 1016 844 1137 43 225 10 279 336 1461 588 111 1066