Lightweight concrete maintains its large voids a nd not forming laitance layers. Air content of structural lightweight concrete must be closely monitored and controlled to ensure that the density requirements. Advantages and disadvantages of lightweight concrete. For structural applications the concrete strength should be greater than 2500 psi 17. There are different recipes to make lightweight concrete depending on the coarse aggregate used and the required strength of the end product.
Lightweight concrete maintains its large voids a nd not forming laitance layers or cement films when placed on the wall. 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 derives its compressive strength from the molecules in the foam additive that when properly mixed form around the cement and serve as aggregate does in standard concrete mixes. Concrete can be pumped or sprayed to fill into cracks. Lightweight concrete this chapter covers some of the physical properties of lightweight concrete. A contextual analysis of the advantages by using lightweight. May 09, 2018 there are different recipes to make lightweight concrete depending on the coarse aggregate used and the required strength of the end product. Aci 2r14 guide for structural lightweightaggregate. Aci 2r14 guide for structural lightweightaggregate concrete. It is governed primarily by economic considerations. Structural lightweight concrete has an inplace density unit weight on the order of 90 to 115 lb ft3 1440 to 1840 kgm3 compared to normalweight concrete with a density in the range of 140 to 150 lb ft3 2240 to 2400 kgm3. What are the disadvantages of lightweight concrete. Polystyrene lightweight concrete polyconcrete zaher kuhail. Economical in terms of transportation as well as reduction in manpower.
Termite proof and resistant towards freezing issues. Pdf the lightweight concrete has many advantages as compared to conventional concrete. This concrete has its advantages of higher strength for unit weight, better tensile strain carrying capacity. Advantages of lightweight concrete are a higher strength to weight ratio as compared with normal concrete, enhanced in thermal, sound insulation and fire resistance properties 18, 19. Clc blocks cellular lightweight concrete blocks youtube. Pdf light weight concrete lwc is the building material used in the construction of building using latest technology to reduce the self weight. This design innovation resulted in a lightweight insulating concrete system that is viableeven advantageousfor use in reroofing applications. The local industrial waste, if found suitable for lightweight concrete, can be economically utilized. Self compacting concrete is a highperformance concrete which is highly flowable or selfleveling cohesive concrete that can be easily placed in the tight reinforcement. The properties mainly depend on the properties of the lightweight.
Concrete is considered as a chemically combined mass where the inert material acts as a filler and the binding materials act as a binder. It is commonly manufactured by two different methods. Structural lightweight concrete has strengths comparable to normal weight concrete, yet is typically 25% to 35% lighter. Following are the advantages of lightweight concrete.
Masons describe real advantages of lightweight concrete block its one thing to read a pile of technical white papers about the performance, superior fire resistance, aesthetic properties, quality and productivity improvements possible with lightweight concrete masonry units cmu or concrete block. Pdf strength of lightweight concrete jaber h a s s a n. Pdf an overview of advantages and disadvantages of. Sep 12, 2017 advantages of concrete,disadvantages of concrete, advantages and disadvantages of concrete,inert material acts as a filler and the binding materials. Advantages and disadvantages of lightweight concrete giatec. By using porous lightweight aggregate of low apparent specific gravity, i. Because of its ability to retain heat, it increases the energy efficiency of buildings and cuts heatingcooling bills.
Advantages of concrete the following are the advantages of concrete concrete ingredients are easily available. 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. Lightweight concrete aggregates can be obtained naturally or artificially and mostly depends on the local availability of the material. Lightweight concrete, similar to normal weight concrete, is a mixture of water, portland cement or ordinary portland cement opc, and aggregate. Mar 22, 2011 lightweight concrete derives its compressive strength from the molecules in the foam additive that when properly mixed form around the cement and serve as aggregate does in standard concrete mixes. Cellular lightweight concrete materials, applications and. Pdf strength of lightweight concrete jaber h a s s a n alsodi. The most important binding materials are cement and lime. Its advantages are that there is a reduction of dead load, faster building rates in construction and lower haulage and handling costs. Concrete is durable, low maintenance, and resistant to wind, water, and fire. Concrete is considered to be lightweight is the density is not more than 2200kgm 3 the density of normal weight concrete is assumed to be between 2300kgm 3 and 2400kgm 3 and a. Understanding different types of lightweight concrete. Concrete can be easily transported from the place of mixing to place of casting before initial set takes place.
Apr 12, 2018 lightweight concrete foamed concrete, aac, etc. Jan 22, 2017 advantages, types of the concrete whose density is lower than normal concrete 2200 kgm 3 or 140 lbft 3 is known as lightweight concrete. It is lighter than conventional concrete dry density 300 kgm3 up to 1840 kgm3. 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 range of 140 to 150 lbft 3 2240 to 2400 kgm. The advantages of lightweight concrete are its reduced mass. Lightweight concrete reduces the cost of formwork and steel and it also. The concrete plays a very important role in all branches of civil engineering. Lightweight aggregate concrete is usually defined as a concrete having an airdry density of below 1850 kgm. Cellular lightweight concrete has several advantages associated with their applications. So its advantages are that there is a reduction of dead load, faster. Ingredients of concrete are easily available in most of the places. Lightweight insulating concrete systems are placed using mixing and pumping equipment. A simple recipe for basic lightweight concrete is to combine 8 parts sand, 8 parts cement and 8 parts. 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.
Cellular lightweight concrete seminar report, ppt, pdf. Pdf a contextual analysis of the advantages by using. If the foam additive is not properly mixed, there is a probability of foam collapse, which weakens the products compressive strength. Suspended floors have been benefiting from lightweight concrete for years, as it reduces the weight on the structure and increases fire resistance. Most of current concrete research focuses on highperformance concrete, by which is meant a costeffective material that satisfies demanding performance requirements, including durability. The lightweight concrete has its obvious advantages of high strengthweight. Masons describe real advantages of lightweight concrete block its one thing to read a pile of technical white papers about the performance, superior fire resistance, aesthetic properties, quality and productivity improvements possible with lightweight concrete masonry units cmu or. Three types of lwc light weight aggregate concrete aerated concrete no fines concrete 3. Air content of structural lightweight concrete must be closely monitored and controlled to ensure that the density requirements are being achieved. Lightweight aggregate is a relatively new material. Because lightweight concrete is typically thinner is made of different ingredients than traditional concrete, floors can be up to 45% lighter regular concrete floors. Table 1 table en 2067 such a table is included in the lightweight concrete standard as well, but it contains different numerical values. Pdf effective uses of light weight concrete researchgate. Lightweight concrete an overview sciencedirect topics.
Smaller sections as well as smaller sized foundations can be used. A number of advantages in using lowdensity lightweight concrete in construction are due to its low density, low thermal conductivity, low shrinkage and high. Unlike natural stones, concrete is free from defects and flaws. The strength of such concrete is, however, less, but still, it is adequate to be used for precast concrete and reinforced concrete units. Mechanical properties of structural lightweight concrete. A contextual analysis of the advantages by using lightweight concrete blocks as substitution of bricks kundan kulbhushan1, sandeep kumar verma2, rahul chaudhary3, shahbaz ahamad4, sneha gupta5, shri ram chaurasia6 1,2p.
It is classified as structural or nonstructural concrete depending on strength and compression rating, generally determined by the type of aggregate material used in the concrete mix. Furthermore using lightweight concrete improves construction and handling techniques. Structural lightweight concrete offers design flexibility and substantial cost savings by. Aerated concrete is also wellknown as a cellular concrete 1. Cellular lightweight concrete clc also known as foamed concrete is one of the most significant type of concrete used for construction purposes due. Faster construction and requires less manpower reduce the overall cost of production. It has significant applications on the structure, the featuring lightly gives several functions in of thermal and. Founded in 1904 and headquartered in farmington hills, michigan, usa, the american concrete institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensusbased standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design. Apr 29, 2020 lightweight concrete, similar to normal weight concrete, is a mixture of water, portland cement or ordinary portland cement opc, and aggregate.
Self compacting concrete scc advantages and disadvantages. The key to success is to develop a holistic view that takes every as. The reduction in weight of concrete helps easy removal, transport and erection of precast products. Lightweight concrete lightweight concrete is of utmost importance to the construction industry. Structural lightweight concrete provides a more efficient strengthtoweight ratio in structural elements. Basically lightweight concrete is used to reduce the weight of concrete. Explore cellular lightweight concrete with free download of seminar report and ppt in pdf and doc format.
Aci 2r14 guide for structural lightweight aggregate concrete author. However, it has also been suspected in increasing cases of moisturerelated. Assessing the sustainability of a project is a complex task. Advantages and disadvantages of concrete civil engineering. Here are some more advantages and disadvantages of using concrete as a building material. Lightweight concrete differs from standard concrete mixtures in ways that can. In the sign of concrete the compressive strength class is given already for two different sample shapes. For the same crushing strength, the density of concrete made with such an aggregate can be as much as 35% lower than the normal weight concrete. The information is based on many laboratory studies and records of a large number of existing structures that have provided satisfactory service for more than 85 years. Lightweight concrete mixture is made with a lightweight coarse aggregate and sometimes a portion or entire fine aggregates may be lightweight instead of normal aggregates. Learn more about the advantages and disadvantages of lightweight concrete.
Materials, production, properties and application of. Density of this concrete is considerably low 300 kgm3 to 1850 kgm3 when compared to normal concrete 2200kgm3 to 2600kgm3. The aerated concrete is a one types of lightweight concrete. Importance of lightweight concrete or foamed concrete. Lightweight concrete is a concrete which includes an foaming agent in it that increases the volume of the mixture while reducing the dead weight. Although the cubic meter of lightweight concrete may be sometimes more expensive than the cubic meter of normal concrete. The concrete whose density is lower than normal concrete 2200 kgm3 or 140 lbft3 is known as lightweight concrete.
In place density of 90 to 115 lbft3 compared to the. Nov 22, 2016 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. Normal weight concrete a density in the range of 140 to 150 lbft. Lightweight aggregate concretes can be used for structural applications, with strengths equivalent to normal weight concrete. The use of lightweight concrete results in the reduction of cost to the extent of about 30 to 40 percent. The reduction in weight of concrete helps easy removal, transport and. It has significant applications on the structure, the. Lightweight concrete maintains its large voids and not forming laitance layers or cement films when placed on the wall. Typically, properties of lightweight concrete have been compared with those of. The main specialties of lightweight concrete are its low density and thermal conductivity. It is convenient to classify the various types of lightweight concrete by their method of production. Study of lightweight concrete behaviour lightweight concrete can be defined as a type of concrete which includes an expanding agent in that it increases the volume of the mixture while giving additional qualities such as nailbility and lessened the dead weight.
Structural lightweight concrete made with rotary kiln produced structural lightweight aggregate solves weight and durability problems in buildings and exposed structures. Structural lightweight concrete has an inplace density unit weight on the order of 90 to 115 lb ft. Concrete can be easily handles and moulded to any desired shape. Those advantages include not only weight considerations, but also insulation value, sound reduction, and workability. This report presents the results of the investigation of the response of lightweight concrete to elevated. They are foamed concrete nonautoclaved aerated concrete naac and autoclaved aerated concrete aac. Lightweight concrete presents a number of benefits to the building industrylighter weight on a buildings structural load, greater sound absorption, better shock absorption and flexibility, improved insulation valueswhen compared to standard concrete blends. Therefore, lightweight concrete contains should be low dense and weigh less than kgm3. The basic design for lightweight concrete is covered in eurocode 2 part 11, with section 11 having particular rules required for lightweight aggregate concretes. The lighter the concrete, the greater are the differences to be accounted for in the properties of the concrete. Lightweight aggregate concrete may be very different from normal weight concrete from this point of view.
This concrete has its advantages of higher strength. Concrete can be manufactured to the desired strength with an economy. Cellular lightweight concrete seminar report, ppt, pdf for. It can be divided into two main types according to the method of production. The long service life of a concrete building also increases its ecoefficiency. Advantages and disadvantges of lightweight concrete 12 4.
The advantages of using lightweight concrete products can be multifold, including potentially reduced formwork requirements, section sizes and reinforcement requirements owing to lower dead loads, as well as reduced thermal expansion and higher strain capacity that can lessen the susceptibility to thermal. Cellular concrete is a cementitious paste of neat cement or cement and fine sand with a multitude of micromacroscopic discrete air cells uniformly distributed throughout the mixture to create a lightweight concrete. It includes an expanding agent in it to increases the volume of the mixture while giving additional qualities. Structural lightweight concrete mixtures can be designed to achieve similar strengths as normalweight concrete. Lightweight concrete can be specified using the notation lc for the strength class, e. Scc can be placed easily in complicated formwork and dense reinforcement. Foamed concrete is manufactured by mixing portland cement, sand, fly ash, water and preformed foam in varied proportions. The same is true for other mechanical and durability performance requirements.
For normal weight concrete we have conversion factors, when testing not at the age of 28 days or the curing of specimens is not according to the standard. The lightweight concrete has many advantages as compared to conventional concrete. Self compacting concrete scc advantages and disadvantages self compacting 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 2018. The purpose of this report is to investigate the types, advantages, mechanical properties of lwc. How to make lightweight concrete using styrofoam hunker.
Using less sand can make the product lighter, but it can also make the concrete weaker structurally. Apr 25, 2018 concrete is durable, low maintenance, and resistant to wind, water, and fire. Lightweight concrete is a type of concrete contains expanded light weight aggregates which increase the volume of the mixture while giving additio nal qualities such as lowering the dead weight. Advantages of concrete,disadvantages of concrete,advantages and disadvantages of concrete,inert material acts as a filler and the binding materials. Aci 2r14 guide for structural lightweightaggregate concrete author. Clc blocks cellular lightweight concrete blocks foam concrete blocks foamcrete what is clc. The other main specialties of lightweight concrete are its low density and thermal conductivity. These vary from lightweight aggregate concrete, foamed concrete, or autoclaved aerated concrete aac. Light weight concrete is a special concrete which weighs lighter than conventional concrete. Knowing the advantages and disadvantages of lightweight concrete can be the. Structural lightweight concrete mixtures can be designed to achieve similar strengths as normal weight concrete. Classification and advantages of light weight concrete. Jun 09, 2015 advantages of concrete the following are the advantages of concrete concrete ingredients are easily available.
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