Experimental Study on Lightweight Concrete Using Lightweight Expanded Clay Aggregate (Leca) and Expanded Perlite Aggregate (Epa) (original) (raw)
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Mechanical Properties of Light Weight Concrete using Lightweight Expanded Clay Aggregate
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2022
This research investigates the impact of partially substituting coarse aggregate with light weight coarse material (LECA). In numerous aspects, LECA mirrors the properties of coarse aggregate. Because self-weight accounts for a major amount of the total load applied to the structure, LECA is utilized in concrete to lower the need for coarse aggregate and in the design of concrete buildings. This is crucial in circumstances like poor soils and tall constructions. It also offers significant advantages in terms of lowering concrete density, which improves labour efficiency. Lightweight concrete has a lower density than standard concrete and provides better thermal insulation. The main purpose of this study is to examine the weight and strength characteristics of concrete, such as cube compressive strength, split tensile strength cylinders, and flexural strength of light weight concrete versus conventional concrete by substituting LECA for natural aggregates by 25%, 50%, 75%, and 100%, respectively. For far over two millennia, lightweight aggregate has been used successfully.
Development of Innovative Structural Light Weight Concrete by using Expanded Clay Aggregates
Lightweight concrete can be produced by replacing the normal aggregate with lightweight aggregate, either partially or fully, depending upon the requirements of density and strength. The present study covers the use of Expanded Clay Aggregate (LECA) as lightweight aggregate in concretes containing micro silica as a supplementary cementations material. The main aim of this project is to develop the Lightweight concrete for structural use. The different mixes were designed by using the efficiency of micro silica with the different percentages of light weight aggregate LECA and Sintagg. The resulting concretes were seen to have densities varying from 900 to 1860 kg/m3, with the corresponding compressive strengths varying from 5 to 35 MPa which leads in reduction of dead load, faster building rates and lower haulage and handling costs to pull off economy.
Experimental Study on Light Weight Concrete by Using Light Expanded Clay Aggregate (LECA
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2022
This study examined the structural behavior of Lightweight concrete (LWAC) using lightweight aggregates (Light expanded clay aggregates LECA) and normal weight aggregates, aims to investigate on concrete mix M25 by the effect of partially and fully replacement of the coarse aggregate by LECA with various percentage such as 20%, 40%, 60%, 80% and 100%. Analysis of this concrete was done in fresh state as well in hardened state to evaluate mechanical properties of concrete. This paper concentrated on performance parameters such as compressive strength, splitting tensile strength of the light weight concrete using LECA. The Lightweight concrete density varies from 40%-100% replacement of LECA such as 1996kg/m3-1597kg/m3. It reduces the weight of concrete and cost of concrete by reducing the aggregate cost and produces economical system.
Effects of Recycled Crushed Light Expanded Clay Aggregate on High Strength Lightweight Concrete
2020
Many researchers are carrying out environmentally-friendly action in the construction field, such as using recycled aggregate for sustainable development. Disposal of light expanded clay aggregate (LECA) waste into the land causes a severe impact on the environment. LECA is one of the construction materials that are broadly used for various applications. LECA has some excellent properties in its due to technical features, eco-friendly and entirely natural product with a low cost, lightweight, hardness and highly resistant to biological, chemical, and physical degradation forces. Recently, lightweight structural concrete by incorporating lightweight aggregate (LWA) is used to compensate heavy loads by reducing the overall self-weight of structure and minimize the size of the foundation simultaneously. In this study, partially replacement of high content light expanded clay aggregate (LECA) (50, 60, 70, 80, and 90%) have been used to achieve the mechanical properties of high strength ...
PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ENGINEERING RESEARCH 2021 (ICER 2021), MOSCOW, RUSSIA
Today, due to the geographical location of Iran, which is a seismic region, the importance of lightening buildings to reduce earthquake damage is felt more than ever. Also, this lightening and reducing the dead load in the structure reduces the dimensions of the foundation, beams and columns. The aim of this study was to compare the compressive strength of lightweight concrete containing Leca and lightweight concrete containing Scoria. In this paper, the results of 12 cubic samples of 10 × 10 × 10 cm 3 cubes are analysed. The ratio of water to cement and the use of lightweight aggregates are considered fixed in both designs. Before mixing, both light grains were placed in water for 24 hours to saturate. The test results show that the use of Scoria lightweight aggregate brings the average 28-day compressive strength of concrete to about 800Kg/m 2 , However, due to the relatively high specific gravity of Scoria, which is about 1823 Kg/m 2 , the specific gravity of the resulting concrete exceeds the allowable range set for lightweight structural concretes. In contrast to the use of lightweight Leca, concrete with a strength of about 373 Kg/m 2 and a specific weight within the defined range of lightweight structural concrete.
SCIENDO, 2021
In the paper, the effects of different percentages of additives (perlite, LECA, pumice) on the mechanical properties of structural lightweight aggregate concrete were tested and evaluated. For the research, 14 mixing designs with different amounts of aggregate, water, and cement were made. Experimental results showed that the specific gravity of lightweight structural concrete made from a mixture of LECA, pumice, and perlite aggregates could be 25-30% lighter than conventional concrete. Lightweight structural concrete with a standard specific gravity can be achieved by using a combination of light LECA with perlite lightweight aggregates (LA) and pumice with perlite in concrete. The results indicated that LECA lightweight aggregates show more effective behavior in the concrete sample. Also, the amount of cement had a direct effect on increasing the strength regardless of the composition of LAs. The amount of cement causes compressive strength to increase. Furthermore, the stability of different experimental models increased from 156 to 345 3 kg m while increasing the amount of cement from 300 to 400 3 kg m in the mixing designs of LECA and perlite for W/C ratios of 0.3, 0.35, and 0.4. For a fixed amount of cement equal to 300 kg, the compressive strength is reduced by 4% by changing the water to cement ratio from 0.5 to 0.4. The compression ratios of strength for 7 to 28 days obtained in this study for lightweight concrete were between 0.67-0.8. Based on the 2 Corresponding 140 Mehdi KHOSHVATAN, Majid POURAMINIAN rate of tensile strength to the compressive strength of ordinary concretes, which is approximately 10, this ratio is about 13.5 to-17.8 in selected and optimal lightweight concretes in this research, which can be considered good indirect tensile strength for structural lightweight concretes.
STUDY ON EFFECTS OF LIGHT WEIGHT AGGREGATES ON COMPRESSIVE AND FLEXURAL STRENGTH OF CONCRETE
The present day world is witnessing construction of very challenging and difficult civil engineering structures. In this study comparison has been made between plain cement concrete and light weight concrete having different proportion of aggregates and admixtures. i.e., Expanded Clay Aggregates: 0%, 25%, 50%, 75% and 100% with coarse aggregate, silica fumes 10% and PVA(Poly Vinyl Alcohol) 1.6% of constant replacement with cement and water respectively. It helps to increase the volume of concrete and hence reduce the weight. In Design of concrete structures, light weight concrete plays a prominent role in reducing the density and to increase the thermal insulation. These may relate of both structural integrity & serviceability. More environmental and economical benefits can be achieved if waste materials can be used to replace the fine light weight aggregate.
Journal of Cleaner Production, 2015
In this paper the main mechanical properties of concrete produced with recycled aggregates obtained from crushing both structural and non-structural lightweight concrete are characterized. Various concrete mixes with replacement ratios of 20%, 50% and 100% of two types of coarse lightweight aggregates (LWA) by recycled lightweight concrete aggregates (RLCA) were studied in terms of their compressive strength, tensile strength, modulus of elasticity and abrasion resistance. Generally the experimental results show that all the studied properties are improved with the introduction of RLCA. In particular, concrete with RLCA has higher structural efficiency than the reference concrete, with LWA alone. It is thus concluded that more cost-effective structural lightweight concrete (LWC) can be produced with the introduction of RLCA. Moreover, it is shown that the RLCA obtained from non-structural lightweight concrete can be used to produce structural LWC. There is a slight reduction of the concrete's mechanical properties when the stronger LWA is replaced with the more porous RLCA obtained from non-structural lightweight concrete.
PERFORMANCE OF LIGHT WEIGHT AGGREGATE CONCRETE-A REVIEW
IRJET, 2023
The main constituents of concrete are cement, aggregates, and water. The need for concrete increases as infrastructure expands. A rise in demand for concrete's constituents has resulted from the continued expansion of its use. One of the most mined materials in the world is coarse aggregate. Total demand has reached an all-time high due to rising building and urbanisation. This necessitates a global increase in the number of quarries. This illness is highly detrimental to the environment. Moreover, it has expedited the depletion of our natural resources. In an effort to decrease environmental damage and the depletion of natural resources, researchers are investigating viable substitutes for regularly used combinations. Environmental conservation, including waste reduction and the judicious use of natural resources, was a top focus for construction and building materials. By blending different types of waste, new materials, such as eco-concrete, specialty concrete, etc., have been produced. In nontraditional concretes, fly ash, crushed granulated blast furnace slag, silica fume, building demolition debris, plastics, and glass were utilised in place of cement or aggregates. Furthermore, wastes can be utilised to generate lightweight concretes. In this article, a variety of studies conducted by researchers to develop lightweight concrete by employing a variety of feasible light weight aggregates are addressed..
IRJET- Review on Lightweight Concrete Using LECA
IRJET, 2021
Light Expanded Clay Aggregate is one of the artificial lightweight aggregates which has wide range of application. Clay is used for manufacturing of lightweight aggregates. The use of waste clay generated by major infrastructure development projects for manufacturing the lightweight aggregates has a positive impact on the environment. This paper reviews the manufacturing process of expanded clay aggregate and the influence of processing conditions on its physical and mechanical properties. It also reviews secondary materials that can be incorporated into concrete containing expanded clay aggregates to enhance its properties. The variation in fresh, hardened and durability properties of concrete with variation in the proportion of expanded clay aggregate is also discussed. The utilization of expanded clay aggregates in concrete increases workability, fire resistance, sound and thermal insulation. On the contrary, its incorporation reduces density, strength, elastic modulus and resistance to freeze thaw action of concrete.