A study on properties of foamed concrete with natural and synthetic foaming agent (original) (raw)
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Microstructure and mixture proportioning of non-structural foamed concrete with silica fume
Magazine of Concrete Research, 2017
This paper presents the results of an experimental study conducted to investigate the microstructure and mixture proportioning of non-structural foamed concrete with silica fume (SF). For the purposes of this study, 20 mix designs were made, including four different proportions of SF to cementitious materials (SF/CM) (0%, 5%, 10% and 15%) and five different densities (450, 500, 600, 700 and 750 kg/m3). All the mix designs were prepared with a water-to-cementitious materials ratio (W/CM) of 0·6. Compressive strength was measured at curing ages of 7, 14, and 28 d. It was found that replacement of cement with SF resulted in higher compressive strengths for the given densities examined. Scanning electron microscopy and X-ray diffraction tests showed that SF in foamed concrete reacts with the free calcium hydroxide of hydrated cement and produces calcium–silicate–hydrate, which is stiffer and more durable than calcium hydroxide. In addition, ettringite content reduces when the SF/CM rati...
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h i g h l i g h t s A comprehensive review on the physical and functional characteristics of foam concrete. An in-depth review of foamed concrete in terms of its components, fresh state and physical properties. A brief review of foam concrete prepared using various types of foams. Various mechanical properties and functional characteristics are also presented. A brief outline of various applications of foam concrete is also reported.
IRJET, 2020
Nowadays, builders across the world are paying increasing attention to use eco-friendly material as replacement for conventional building materials. The adverse development in construction field has initiated for using light weight concrete with good characteristics. Foam concrete is a mixture of cement, fine sand (substituted by fly ash), water and predetermined volume of foam. By diluting the foam in agent with water and aerated to form foam. Cement paste get hardens once it sticks with foam. Foaming agents may be synthetic or protein based foaming agents. Foaming agents which comes from animal proteins such as blood, bones of cows, pigs and other animal carcasses are classified under protein based. An attempt has been made to determine the strength and durability characteristics of M20 grade Foam concrete by using synthetic foaming agent.
Properties of a foamed concrete with soil as filler
Soil-based foam concrete exhibits unusual physical properties, such as strength, thermal insulation and water resistance. Silica fume added into soil-based foamed concrete can greatly increase the physical properties. The fit of mathematical expressions based on hygroscopic test results was investigated.
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1M.E. Structural Engineering, Gnanamani College of Engineering, Namakkal, Tamilnadu, India 2Assistant Professor, Dept. of Civil Engineering, Gnanamani College of Engineering, Namakkal, Tamilnadu , India ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract: The development of construction industries provides countless benefits to the society and the people. At present scenario construction field all around the world is facing a serious problem with price hike of raw materials. So they are very much concern to reduce the consumption of readily available raw materials.. It is also important for engineers to develop ecofriendly material, as environment is getting affected day by day by the increasing construction activities. Usage of foam concrete is an innovative idea to achieve the requirements. Because of its lightweight, the rate of construction is quick and the installation becomes easy....
EXPERIMENTAL STUDIES ON FOAM AND SILICA FUME BASED CELLULAR LIGHT WEIGHT CONCRETE
IRJET, 2023
This research paper examines the use of foam and silica fume in the production of lightweight concrete. Foam-based lightweight concrete is created by introducing air or gas bubbles into a cement mixture, while silica fume-based lightweight concrete is made by mixing silica fume with cement, sand, water, and other additives. Both types of lightweight concrete have advantages and disadvantages, depending on the specific application and desired properties. Foam-based lightweight concrete has good insulation properties and is easy to produce, but is not as strong as silica fume-based lightweight concrete. Silica fume-based lightweight concrete is stronger and more durable, but may require specialized equipment and is more difficult to produce. This paper reviews the current research on the properties and applications of foam and silica fumebased lightweight concrete, and provides insight into the potential uses and limitations of each type of lightweight concrete.
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With the development of new cement-based raw materials, foaming agents and fillers used for special applications of foam concrete, the use of foam concretes has become widespread. Foam concrete is a type of concrete that stands out with its lightness, waste potential, controlled low strength, thermal insulation, acoustics performance, and durability. The knowledge base is still developing for this particular building material. This article describes in detail the fresh, hardened, and physical properties of foam concrete. The properties of materials such as cement, aggregate, foam, and fiber used in foam concrete production are explained and their effects on microstructure are discussed. In addition, physical properties, such as fresh state properties, fresh state and consistency, stability, workability, drying shrinkage, air void system, and water absorption, as well as strength and durability properties are emphasized. The main findings of the presented study are to show the curren...
Experimental Study of Foam Concrete by Using Different Mixes
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2022
Foamed concrete can also be termed as lightweight or cellular concrete. It consist of is a cementitious paste, fines, water and has coarse aggregate without voids. Voids are created by using foam. It creates more strength than plain foam concrete (PFC) by using admixtures like fly ash, silica and fibers in it. Under this research program, three different mixes were made: plain foamed concrete (PFC), polypropylene fiber reinforced foamed concrete (PPFC) and basalt fiber reinforced foamed concrete (BFC). Specimens were tested for compressive strength, splitting tensile strength, young's modulus and poisson's ratio, flexural strength and RFC (Reinforced foamed concrete) strength. This study showed that the use of optimum foam volume i.e. 20% gives a specific density of foam concrete 70-100 PFC and compressive strength of 3000-5500 psi. As the study of flexural and compression application eight different steel reinforced sandwich beams, sixteen compression column of witch eight are tested with and without reinforcement separately respectively. These sandwich beams of steel reinforcement were divided in four different sets as two of each, normal concrete-Styrofoam R-13 rating combination, normal concrete-PFC combination, normal concrete-PPFC combination and normal concrete-BFC combination. Likewise, for study of structural behavior of compression column the specimens were divided same as sandwich beams into different groups. The flexural strength of BFC specimen was 10 times more than PFC specimen. Among the RFC beam specimens, BFC has shown maximum load carrying capacity.
Applied Sciences, 2019
The main objective of this study was to evaluate the use of additives in producing foamed concrete blocks, which were made by totally replacing natural sand with civil construction waste (CCW). The concrete blocks were developed in accordance with an experimental design that used the complete factorial statistical method, for which three factors with different levels were considered: cement type (CP-V, CP II-Z, and CP II-F); use of additive (without additive, plasticizer, air entrainment, and superplasticizer) and foam amount (5.7%, 7.7%, and 9.5% of the total mass). The influence of each factor and the interactions between them were assessed on the following response variables: compressive strength, dry and saturated density, air voids, water absorption, and thermal conductivity. The results show that all factors had a significant influence on the variable response. For example, the use of the superplasticizer additive resulted in higher compressive strength, lower density, lower a...
Experimental Study on Mechanical and Thermal Behavior of Foamed Concrete
Materials Today: Proceedings, 2018
Foamed concrete possesses characteristics such as high strength-to-weight ratio and low density. Foamed concrete reduces dead loads on the structure,saves energy and lowers the labour cost during construction. Foam concrete consists of cement, fly ash, water and air voids. The foaming agent used to generate foam is sodium lauryl ether sulphate. Foam concrete can have 10% to 70% air, which results in a material that is lightweight but may compromise the compressive strength and durability properties. Although it has been shown in the research that less connected air voids yield a lower reduction in compressive strength, with the increase in air voids the thermal resistance in increased. The properties like compressive strength and thermal resistance are studied. Six batches of Foamed concrete were prepared with varying air content 15%, 17%, and 20%. The foamed concrete cube and slab are used for compression and thermal testing. The dry density of foamed concrete varies from 860 kg/m 3 to 1245 kg/m 3 , and the compressive strength varies from 2.5-6.5 MPa. In this research, the Dry density, compressive strength and thermal conductivity of foamed concrete is compared with the clay bricks. If foamed concrete blocks are used instead of clay bricks, almost 50% of the dead load of the building can be reduced. The thermal conductivity of foamed concrete varies from 0.021-0.035 W/mK. Key outcomes revealed that foamed concrete has good potential to be used for lightweight structural applications for low-rise buildings owing to its evolution of mechanical properties, transport properties and thermal resistance.