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Journal articles on the topic 'Light expanded clay aggregates (LECA)'

Author: Grafiati

Published: 7 September 2021

Last updated: 29 July 2025

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1

S, Arivalagan, and Dinesh Kumar K S A. "Experimental Study on Light Weight Concrete by Using Light Expanded Clay Aggregate (LECA)." International Journal for Research in Applied Science and Engineering Technology 10, no. 12 (2022): 1091–94. http://dx.doi.org/10.22214/ijraset.2022.48111.

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Abstract: 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

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Singh, Abhishek Kumar, R. Niveda, Ashish Anand, Ajay Yadav, Diwakar Kumar, and Gaurav Verma. "Mechanical Properties of Light Weight Concrete using Lightweight Expanded Clay Aggregate." International Journal for Research in Applied Science and Engineering Technology 10, no. 5 (2022): 2939–43. http://dx.doi.org/10.22214/ijraset.2022.43168.

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Abstract: 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

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3

Zukri, Ir Dr Azhani. "Bearing Capacity of Footing on Soft Clay Strengthened by Lightweight Expanded Clay Aggregate Raft." CONSTRUCTION 3, no. 1 (2023): 6–14. http://dx.doi.org/10.15282/construction.v3i1.8915.

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This research represents an investigation into the effectiveness of replacement methods to increase the bearing capacity of soft clays under footing load, where Light Expanded Clay aggregates (LECA) were used as a substitute for common aggregate fillers. The soil replacement technique is the easiest and cheapest way to improve soft soil compared to installing a raft footing or using a deep foundation such as piles. LECA is known to be light, strong and environmentally sustainable and is widely used in Geotechnical applications where weight is an issue. The bearing capacity of the footing on so

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Vaishnava Kumar, R., N. Tejaswini, Y. Madhavi, and Jyothishya Brahma Chari Kanneganti. "Experimental study on self-compacting concrete with replacement of coarse aggregate by light expanded clay aggregate." IOP Conference Series: Earth and Environmental Science 982, no. 1 (2022): 012006. http://dx.doi.org/10.1088/1755-1315/982/1/012006.

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Abstract The present study deals with fresh and hardened concrete properties of self-compacting concrete while carrying several trial mixes with a variety of water binder ratio and super-plasticizer content and finally achieved a trail mix with satisfying the flow properties as slump flow, V-funnel, and L-box test apparatus values are obtained within the limits of European guidelines. This study was carried out on the properties of Lightweight self-compacting concrete (LWSCC) with a binder content of 517 Kg/m3. In the achieved proportion of the final trail mix, the coarse aggregate will be rep

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Heiza, Khaled, Fatma Eid, and Taha Masoud. "Lightweight self-compacting concrete with light expanded clay aggregate (LECA)." MATEC Web of Conferences 162 (2018): 02031. http://dx.doi.org/10.1051/matecconf/201816202031.

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Lightweight concretes have been successfully applied in building constructions for many years due to their favorable material properties, particularly their low specific weight in connection with a high strength, a high capability of thermal insulation and a high durability. The development leading to lightweight self-compacting concrete (LWSCC) represents an important advanced step within the recent years. This concrete combines the favorable properties of a lightweight concrete with those of a self-compacting concrete. Research work is aimed on development of (LWSCC) with the use of light ag

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Johansson, Lena. "The use of Leca (Light Expanded Clay Aggregates) for the removal of phosphorus from wastewater." Water Science and Technology 35, no. 5 (1997): 87–93. http://dx.doi.org/10.2166/wst.1997.0171.

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Increasing attention is being focused on the phosphorus retention capacity of wetlands. Several attempts have been made to improve the reduction of phosphorus in wastewater by the use of constructed wetlands. One way of improving the phosphorus reduction capacity is to use efficient filter materials in the wetland. Leca® (Light Expanded Clay Aggregates) has been tested in Norway, where laboratory and field investigations gave promising results. To further study the chemical removal mechanism of Leca, an experiment utilising five columns was performed. A phosphate solution was applied to the co

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7

Podnar, Tinkara Marija, and Gregor Kravanja. "Thermal, Mechanical, and Microstructural Properties of Novel Light Expanded Clay Aggregate (LECA)-Based Geopolymer Concretes." Journal of Composites Science 9, no. 2 (2025): 69. https://doi.org/10.3390/jcs9020069.

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The construction sector’s reliance on traditional cement significantly contributes to CO2 emissions, underscoring the urgent need for sustainable alternatives. This study investigates fine (0–4 mm), rounded, uncoated, porous-surfaced lightweight expanded clay aggregate (LECA)-based geopolymers, which combine the low-carbon benefits of geopolymers with LECA’s lightweight and insulating properties. Geopolymers were synthesized using lignite-rich fly ash with varying ratios of LECA to aggregate. Mechanical testing revealed that the reference mixture without LECA (REF-GEO) achieved the highest com

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8

Tabase, Raphael Kubeba, Dezhao Liu, and Anders Feilberg. "Chemisorption of hydrogen sulphide and methanethiol by light expanded clay aggregates (Leca)." Chemosphere 93, no. 7 (2013): 1345–51. http://dx.doi.org/10.1016/j.chemosphere.2013.07.068.

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9

Uslu, İlbüke, Orkun Uysal, Can B. Aktaş, Byungik Chang, and İsmail Özgür Yaman. "Dematerialization of Concrete: Meta-Analysis of Lightweight Expanded Clay Concrete for Compressive Strength." Sustainability 16, no. 15 (2024): 6346. http://dx.doi.org/10.3390/su16156346.

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The construction industry is responsible for a significant share of global material consumption, including natural resources. Therefore, the United Nations Sustainable Development Goal 12.2 on sustainable management and efficient use of natural resources cannot be achieved without significant advances and contributions from the construction sector. Furthermore, various materials used by the construction industry contribute to the development and expansion of the LEED (Leadership in Energy and Environmental Design) system. LECA (Light Expanded Clay Aggregate) is one such material that enhances

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Aboul Nour, Louay, Mariam Gamal, and Amr Ghoniem. "Glass Fiber for Improved Behavior of Light Expanded Clay Aggregate Concrete Beams: An Experimental Study." Frattura ed Integrità Strutturale 17, no. 65 (2023): 1–16. http://dx.doi.org/10.3221/igf-esis.65.01.

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Concrete developed from light expanded clay aggregate (LECA) and glass fiber has good performance, durability, and sustainability. Towards this, the experimental investigation was designed to study cubes, cylinders, and simply supported beams. Four mixtures had LECA volume of 0%, 75%, 85%, and 95% as coarse aggregate replacement and glass fiber content volume of 2% (N, L75, L85, and L95), and the other two mixtures had 75% LECA and glass fiber content of 1% and 1.5% (L75-F1 and L75-F1.5). Results compared to normal concrete showed the weight reduction of samples while adding more glass fiber c

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Movahedi, Nima, and Emanoil Linul. "Mechanical properties of Light Expanded Clay Aggregated (LECA) filled tubes." Materials Letters 217 (April 2018): 194–97. http://dx.doi.org/10.1016/j.matlet.2018.01.078.

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12

Mamatha, K., and M. Mothilal. "Experimental Study Light Weight Concrete Using LECA, Silica Fumes, and Limestone as Aggregates." International Journal for Research in Applied Science and Engineering Technology 10, no. 12 (2022): 1103–10. http://dx.doi.org/10.22214/ijraset.2022.47916.

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Abstract: This dissertation determines the mix proportions of high-strength lightweight concrete, which uses expanded aggregate clay to decrease the weight of the concrete (LECA). Mineral and chemical admixtures have been used to reduce porosity and enhance strength in order to create light weight concrete. With that some percentage of silica fumes is added to enhance the properties of concrete and to make workability stable. On the specimens, specific gravity, compressive, indirect tensile, and flexural strengths were determined. By exposing certain specimens to air, the impact of curing on c

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Mundim, Helen Sandra de Sousa Laet, Brunno Borges Canelhas, Fausto de Souza Pagan, Júlio Cesar de Sousa Inácio Gonçalves, Mário Sérgio da Luz, and Deusmaque Carneiro Ferreira. "Optimization of Pb2+, Cd2+, Ni2+ and Ba2+ adsorption onto light expanded clay aggregate (LECA)." Ciência e Natura 44 (April 12, 2022): e3. http://dx.doi.org/10.5902/2179460x68809.

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The possibility of Pb2+, Cd2+, Ni2+ and Ba2+ ions removal from aqueous solution using light expanded clay aggregate (LECA) was investigated in this work. The central composite design (CCD) in response surface methodology (RSM) was used to optimize the operating parameters (adsorbent granulometry, absorption time and initial metal ions concentration) to reach the maximum ions removal in single and multi-elemental solutions. After optimization, the results shows that the removal efficiency decrease following the ion sequence Pb2+ > Ba2+ > Cd2+ > Ni2+ ions. The better efficiency (~95%) i

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S, Madhumitha, and Dhinakaran G. "Durability Characteristics of Ceramic Waste based Light Weight Concrete." International Journal of Engineering & Technology 7, no. 3.12 (2018): 369. http://dx.doi.org/10.14419/ijet.v7i3.12.16109.

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Ceramic waste powder (CWP) is one waste material produced during cutting of ceramic tiles. CWP is rich in silica and alumina and is a fine material. Due to generation of more such waste it is mandatory to make use such material effectively in construction industry to minimize the disposal problem and also to reduce production of cement. Use of such material will minimize the carbon foot print in production stage of concrete. LECA is a light weight expanded clay aggregate could be used as substitute to natural coarse aggregate which is energy intensive. In this study, CWP is partially substitut

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15

Kharun, Makhmud, Armin Ehsani, Shahin Nasimi, and Tesfaldet H. Gebre. "Properties and behavior of light hydrophobic concrete." Structural Mechanics of Engineering Constructions and Buildings 17, no. 3 (2021): 299–307. http://dx.doi.org/10.22363/1815-5235-2021-17-3-299-307.

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In concrete mixing plan, we usually encounter a combination of aggregates including sand, the amount of cement, which is actually the criterion of concrete grade, and the volume of water consumed. Changes in the quality and quantity of these components actually create the usual types of concrete. But the attitude that formed the basis of this research is based on the change in the nature of the components of the concrete mixing design. Removal of water and cement from the mixing plan and replacement of polymeric materials as well as the use of mixed LECA aggregates instead of aggregates is the

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Mlih, Rawan, Franciszek Bydalek, Erwin Klumpp, Nader Yaghi, Roland Bol, and Jannis Wenk. "Light-expanded clay aggregate (LECA) as a substrate in constructed wetlands – A review." Ecological Engineering 148 (April 2020): 105783. http://dx.doi.org/10.1016/j.ecoleng.2020.105783.

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Rajesh, Kumar, and Lakhani Rajni. "Development of lightweight aggregate concrete with optimum thermal transmittance for opaque wall assembly in composite climates." Abstracts of International Conferences & Meetings (AICM) 1, no. 3 (2021): 27. https://doi.org/10.5281/zenodo.5051936.

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<strong>Introduction:</strong> For making energy- efficient buildings; lightweight aggregate concrete (LWAC) using different lightweight aggregates (LWA) are used such as vermiculite, oil palm shell, perlite, lightweight expanded clay aggregate (LECA), pumice <em>etc.</em> (1). The main objective of the presented study was to develop eco-efficient LWAC using LECA after optimization for their packing density along with optimization of aggregate content, w/c ratio, SP %, slump and cement content. After optimizing each of the above parameter; different kind of physico mechanical and thermal prope

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Martins, Vinícius Ferreira, Greicelene Jesus da Silva, and Alisson Carraro Borges. "Effects of Packing Media and the Insertion of Vegetation on the Performance of Biological Trickling Filters." Water 13, no. 13 (2021): 1735. http://dx.doi.org/10.3390/w13131735.

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The use of the plant Chrysopogon zizanioides (vetiver), able to develop under adverse conditions while removing a great number of pollutants, in constructed wetlands (CWs) is widely reported. Regarding the biological trickling filters (BTFs), the selection of the media is one of the most important factors in its performance. We investigated whether the addition of vegetation improves the efficiency of the basic parameters of BTFs with gravel. In addition, due to the properties of light expanded clay aggregate (LECA), we evaluated whether the support media composed of vetiver and LECA is able t

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19

Zendehzaban, Masoud, Shahram Sharifnia, and Seyed Nezamedin Hosseini. "Photocatalytic degradation of ammonia by light expanded clay aggregate (LECA)-coating of TiO2 nanoparticles." Korean Journal of Chemical Engineering 30, no. 3 (2013): 574–79. http://dx.doi.org/10.1007/s11814-012-0212-z.

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Ardiati, Fenny Clara, Dede Heri Yuli Yanto, Sita Heris Anita, et al. "Application of myco-light expanded clay aggregate for real textile wastewater treatment in rotating drum biological contactor." IOP Conference Series: Earth and Environmental Science 1017, no. 1 (2022): 012023. http://dx.doi.org/10.1088/1755-1315/1017/1/012023.

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Abstract Textile effluent could endanger human health and the water environment, but it is very challenging to be treated due to its complex composition. Biological methods for textile wastewater treatment by using fungi has been extensively studied in a lab-scale yet the investigation on a larger scale is still limited. In this study, a preliminary investigation of immobilized Trametes hirsuta D7 in light expanded clay aggregate (myco-LECA) application was conducted to treat the real textile wastewater in a rotating drum biological contactor. The undiluted wastewater without any addition of c

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Ardiati, Fenny Clara, Dede Heri Yuli Yanto, Sita Heris Anita, et al. "Application of myco-light expanded clay aggregate for real textile wastewater treatment in rotating drum biological contactor." IOP Conference Series: Earth and Environmental Science 1017, no. 1 (2022): 012023. http://dx.doi.org/10.1088/1755-1315/1017/1/012023.

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Abstract Textile effluent could endanger human health and the water environment, but it is very challenging to be treated due to its complex composition. Biological methods for textile wastewater treatment by using fungi has been extensively studied in a lab-scale yet the investigation on a larger scale is still limited. In this study, a preliminary investigation of immobilized Trametes hirsuta D7 in light expanded clay aggregate (myco-LECA) application was conducted to treat the real textile wastewater in a rotating drum biological contactor. The undiluted wastewater without any addition of c

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22

Vinoth, R., and M. Vinod Kumar. "Strength and durability performance of Light Weight Self-Compacting Concrete (LWSCC) with Light Expanded Clay Aggregate (LECA)." IOP Conference Series: Materials Science and Engineering 872 (June 27, 2020): 012104. http://dx.doi.org/10.1088/1757-899x/872/1/012104.

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23

Sharifnia, Shahram, Mohammad Ali Khadivi, Tahereh Shojaeimehr, and Yaser Shavisi. "Characterization, isotherm and kinetic studies for ammonium ion adsorption by light expanded clay aggregate ( LECA )." Journal of Saudi Chemical Society 20 (September 2016): S342—S351. http://dx.doi.org/10.1016/j.jscs.2012.12.003.

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24

Mortazavi, Maryam, and Mojtaba Majlessi. "Evaluation of Silica Fume Effect on Compressive Strength of Structural Lightweight Concrete Containing LECA as Lightweight Aggregate." Advanced Materials Research 626 (December 2012): 344–49. http://dx.doi.org/10.4028/www.scientific.net/amr.626.344.

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The purpose of this paper is to evaluate the effect of silica fume on compressive strength of structural lightweight concrete, containing saturated LECA (Light Expanded Clay Aggregate) as lightweight aggregate (LWA). In experimental phase of study 120 cubic specimens (10*10*10) were made and cured. For every mix design, different cement percentages were replaced with silica fume, containing same amount of saturated LECA. The mixes incorporate 0%, 5%, 10%, 15%, 20%, 25% silica fume. Constant level of Water/Cement ratio (0.37) was considered. For each mix design 20 specimens were prepared and cu

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Yew, Ming Kun, Jing Han Beh, Ming Chian Yew, et al. "Evaluating the Performance of Buoyancy Fiber-Reinforced Floating Concrete with Recycled LECA." Key Engineering Materials 1018 (June 23, 2025): 91–96. https://doi.org/10.4028/p-eg3ynl.

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The growing issue of light expanded clay aggregate (LECA) disposal has become a pressing environmental concern globally, underscoring the need for swift and effective solutions. To mitigate this issue, the construction industry is increasingly adopting sustainable alternatives to traditional concrete. One such innovative approach involves incorporating these waste materials into construction materials, primarily concrete. This study aimed to create a novel, eco-friendly concrete material utilizing recycled LECA, engineered to float on water. The investigation employed a range of polyvinyl alco

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Guida, Giulia, and Francesca Casini. "Packing density of bi-disperse mixtures under one-dimensional compression." EPJ Web of Conferences 249 (2021): 07012. http://dx.doi.org/10.1051/epjconf/202124907012.

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This work aims to investigate the effect of fines in different type of bi-disperse grain size distributions in terms of minimum/maximum density, compressibility and crushing. The material adopted is the Light Expanded Clay Aggregate (LECA), an artificial granular material characterized by light, porous and crushable grains. The bi-disperse grading are firstly analysed in terms of packing density, measuring experimentally the minimum and the maximum porosity for different combination of sizes and volume proportions. Then, some selected mixtures are subjected to one-dimensional compression tests

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Nejati, Faezeh, and S. A. Edalatpanah. "Experimental investigation for the effect of fiber on the mechanical properties of light-weight concrete under dry and wet conditions." International Journal of Structural Integrity 11, no. 2 (2019): 216–38. http://dx.doi.org/10.1108/ijsi-04-2019-0036.

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Purpose The purpose of this paper is to investigate the effect of steel and carbon fibers on the mechanical properties of light concrete in terms of tension strength, compressive strength and elastic modulus under completely dry and wet conditions. Design/methodology/approach In this study, the lightweight concrete made of Light Expanded Clay Aggregate (LECA) as coarse aggregate and sand as fine aggregate was used. To achieve a compressive strength of at least 20 MPa, microsilica was used 10 percent by weight of cement. In order to compensate for the reduction of tension strength of concrete,

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Bavithra, Guna, Joana Azevedo, Alexandre Campos, C. Marisa R. Almeida, and Pedro N. Carvalho. "Evaluating Agro-Based Waste Materials for Cyanotoxin Sorption for Future Incorporation in Nature-Based Solution Units (NBSUs)." Water 17, no. 2 (2025): 285. https://doi.org/10.3390/w17020285.

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Toxic cyanobacterial blooms are a growing environmental problem, persisting in freshwater bodies globally, and potentially hazardous to populations that rely on surface freshwater supplies. Nature-based solution units (NBSUs) are effective and sustainable approaches for water treatment, with sorption being an important process. The purpose of this study was to evaluate unmodified agro-based waste materials (rice husks, olive pulp pomace pellets (OP), cork granules) and the benchmark NBSU substrates (biochar, light expanded clay aggregate (LECA), and sand) for their microcystin-LR (MC-LR) and c

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29

Farahbakhshazad, N., and G. M. Morrison. "Phosphorus removal in a vertical upflow constructed wetland system." Water Science and Technology 48, no. 5 (2003): 43–50. http://dx.doi.org/10.2166/wst.2003.0276.

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Mechanisms for P removal in a vertical upflow macrophyte system were studied in controlled laboratory columns filled with sand and planted with Phragmites australis. Substrate P removal was shown to increase with flow rate, a parameter which can be enhanced through effluent recirculation. An alternative substrate (leca, light expanded clay aggregate) provided improved equilibrium adsorption characteristics, but uncrushed and within the kinetic constraints of a macrophyte system gave no improvement for P adsorption over sand. Intermittent loading of the sand based macrophyte system permitted co

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Sepehr, Mohammad Noori, Hossein Kazemian, Esmail Ghahramani, Abdeltif Amrane, V. Sivasankar, and Mansur Zarrabi. "Defluoridation of water via Light Weight Expanded Clay Aggregate (LECA): Adsorbent characterization, competing ions, chemical regeneration, equilibrium and kinetic modeling." Journal of the Taiwan Institute of Chemical Engineers 45, no. 4 (2014): 1821–34. http://dx.doi.org/10.1016/j.jtice.2014.02.009.

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Rodziewicz, Joanna, Kamila Ostrowska, Wojciech Janczukowicz, and Artur Mielcarek. "Effectiveness of Nitrification and Denitrification Processes in Biofilters Treating Wastewater from De-Icing Airport Runways." Water 11, no. 3 (2019): 630. http://dx.doi.org/10.3390/w11030630.

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The basic factors determining the efficiency of the removal of nitrogen and carbon compounds from airport wastewater containing de-icing agents are low temperature and the C/N ratio (carbon to nitrogen ratio). Biofilm reactors (biofilters) create better conditions for nitrification and denitrification than suspended biomass reactors. The scope of the study included determination of the influence of the C/N ratio in the wastewater on nitrification, denitrification and organic compound removal in biofilm reactors depending on the temperature. The experiment was performed in 24 circular laborator

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Brix, H., C. A. Arias, and M. del Bubba. "Media selection for sustainable phosphorus removal in subsurface flow constructed wetlands." Water Science and Technology 44, no. 11-12 (2001): 47–54. http://dx.doi.org/10.2166/wst.2001.0808.

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Sorption of phosphorus (P) to the bed sand medium is a major removal mechanism for P in subsurface flow constructed wetlands. Selecting a sand medium with a high P-sorption capacity is therefore important to obtain a sustained P-removal. The P-removal capacities of 13 Danish sands were evaluated and related to their physico-chemical characteristics. The P-removal properties of sands of different geographical origin varied considerably and the suitability of the sands for use as media in constructed reed beds thus differs. The P-sorption capacity of some sands would be used up after only a few

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Mæhlum, T. "Treatment of landfill leachate in on-site lagoons and constructed wetlands." Water Science and Technology 32, no. 3 (1995): 129–35. http://dx.doi.org/10.2166/wst.1995.0134.

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On-site “high-tech” leachate treatment systems are often avoided due to large construction and operation costs. Alternative integrated methods need to be examined. This paper describes a biological treatment system, capturing leachate from a municipal sanitary waste (MSW) landfill on-site. The area has a typical cool temperate continental climate. The treatment system is built in a ravine and has been operating since July 1993. The average flow is estimated to be 120 m3 d−1. The low-strength leachate is first treated in a 400 m3 anaerobic pond. Stage 2 is a 4000 m3 aerated lagoon with 3 AIRE-O

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Sepehr, Mohammad Noori, Farideh Allani, Mansur Zarrabi, et al. "Dataset for adsorptive removal of tetracycline (TC) from aqueous solution via natural light weight expanded clay aggregate (LECA) and LECA coated with manganese oxide nanoparticles in the presence of H2O2." Data in Brief 22 (February 2019): 676–86. http://dx.doi.org/10.1016/j.dib.2018.12.077.

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Chen, Xinhan, Zhen Hu, Yijin Zhang, et al. "Removal Processes of Carbamazepine in Constructed Wetlands Treating Secondary Effluent: A Review." Water 10, no. 10 (2018): 1351. http://dx.doi.org/10.3390/w10101351.

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It is widely believed that constructed wetlands (CWs) own great potentiality as polishing wastewater treatment methods for removing carbamazepine (CBZ). Although the typical CBZ removal efficiencies in CWs are quite low, the CBZ removal performance could be improved to some extend by optimizing the CW design parameters. A comparison of current relevant studies indicates that horizontal sub-surface flow CWs (HSSF-CWs) and hybrid wetlands are attracting more interest for the treatment of CBZ wastewater. According to CBZ’s physicochemical properties, substrate adsorption (25.70–57.30%) and macrop

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Ali, Hadeel H., and Hadeel K. Awad. "The Influence of Nano-Silica on Some Properties of Light Weight Self-Compacting Concrete Aggregate." E3S Web of Conferences 427 (2023): 02008. http://dx.doi.org/10.1051/e3sconf/202342702008.

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Lightweight concrete (LWC) has been used successfully in building constructions for many years due to its physical properties and its lightweight with high thermal insulation and durability. Recently, this work was done on a new type of concrete: lightweight self-compacting concrete (LWSCC) that combines the feature of lightweight and self-compacting concrete simultaneously. In this study, light expanded clay aggregate (LECA) was used as coarse aggregate in (LWSCC) mixtures, using nano-silica as a partial replacement of cement with three percent (0.5, 0.75, and 1%) by mass of cement. They were

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Mielcarek, Artur, Kamila Ostrowska, Joanna Rodziewicz, Wojciech Janczukowicz, and Joanna Struk-Sokołowska. "Influence of temperature and C/N ratio on nitrifying and denitrifying bacteria of biofilters treating wastewater from de-icing airport runways." E3S Web of Conferences 116 (2019): 00050. http://dx.doi.org/10.1051/e3sconf/201911600050.

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One of the key elements in the operational management of airports is effective de-icing of surfaces. The run-off of precipitation water loaded with pollutants from de-icing is a considerable and costly problem. The aim of our research has been to evaluate the applicability of biofilters filled with light expanded clay aggregate (LECA) generated from incineration of sewage sludge and now serving as a matrix for the development of microorganisms. The tested biofilters treated precipitation water polluted with agents used to de-ice airports. The solution was tested on a laboratory scale, in a ran

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Sohrabi, Somayeh, and Faranak Akhlaghian. "Light expanded clay aggregate (LECA) as a support for TiO2, Fe/TiO2, and Cu/TiO2 nanocrystalline photocatalysts: a comparative study on the structure, morphology, and activity." Journal of the Iranian Chemical Society 13, no. 10 (2016): 1785–96. http://dx.doi.org/10.1007/s13738-016-0896-9.

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Bekhradinassab, Ensie, and Morteza Esfandyari. "Biodiesel production by iron oxide supported on light weight expanded clay aggregate (Fe2O3-f-LECA) Catalyst: Box-Behnken design-based optimization and ANFIS modeling with GA and PSO." Renewable Energy 251 (October 2025): 123466. https://doi.org/10.1016/j.renene.2025.123466.

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Ghezali, Katia, Nourredine Bentahar, Narcis Barsan, Valentin Nedeff, and Emilian Moșneguțu. "Potential of Canna indica in Vertical Flow Constructed Wetlands for Heavy Metals and Nitrogen Removal from Algiers Refinery Wastewater." Sustainability 14, no. 8 (2022): 4394. http://dx.doi.org/10.3390/su14084394.

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Constructed wetlands (CWs) are important plant filters used for wastewater treatment. The behavior of the Canna indica-planted CWs in the face of a highly variable composition of industrial wastewater has yet to be understood. Here, we show the effectiveness of Canna indica-planted and unplanted vertical subsurface flow CWs for the treatment of Algiers petroleum refinery’s effluent. The selected species was placed in the CWs containing light expanded clay aggregate (LECA) and sand as a substrate. The findings indicate that the planted constructed wetlands efficiently removed 85% of total suspe

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Osiota, O. Murphy, Sylvester O. Obam, and Manasseh Joel. "Evaluation of Effect of Sodium Silicate and Bacillus Pasteurii in Self-Healing Ability of Concrete." International Journal of Advanced Academic Research 10, no. 8 (2024): 88–103. https://doi.org/10.5281/zenodo.14062214.

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<em>One of the major defects of hardened concrete is crack. Cracks allow water to permeate into concrete and it could corrode the reinforcing steel fibres. Concrete liquid retaining structures do not function properly if cracks are not controlled. This study examines the effectiveness of sodium silicate and bacillus pasteurii mixed in concrete to control its cracks. The objectives are to determine the healing ability of sodium silicate gel, spore bacillus pasteurii, and solution of bacillus pasteuriii when mixed with concrete. Laboratory experimental methods were adopted for the research. The

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Pęczkowski, Grzegorz, Katarzyna Szawernoga, Tomasz Kowalczyk, Wojciech Orzepowski, and Ryszard Pokładek. "Runoff and Water Quality in the Aspect of Environmental Impact Assessment of Experimental Area of Green Roofs in Lower Silesia." Sustainability 12, no. 11 (2020): 4793. http://dx.doi.org/10.3390/su12114793.

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Green architecture, including green roofs, can limit the effects of urbanization. Green roofs soften the thermal effect in urban conditions, especially considering the significant increase in the European and global population and that a significant share of the age group, mainly the elderly is exposed to diseases caused by high temperatures. We studied runoff and the quality of water from green roof systems in Lower Silesia, within the area of the Agro and Hydrometeorology Station Wrocław-Swojec, in the years 2012–2016. In the study, two systems with a vegetation layer based on light expanded

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Zukri, Azhani, Ramli Nazir, Khairun Nissa Mat Said, and Hossein Moayedi. "Physical and Mechanical Properties of Lightweight Expanded Clay Aggregate (LECA)." MATEC Web of Conferences 250 (2018): 01016. http://dx.doi.org/10.1051/matecconf/201825001016.

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Lightweight aggregate is the generic name of a group of aggregates having a relative density lower than normal aggregates (natural sand, gravel, and crushed stone), sometimes is referred to as low density aggregate. Depending on the source and the method of production, lightweight aggregates exhibit considerable differences in particle shape, texture and properties. Lightweight expanded clay aggregate (LECA) is among the common lightweight materials that have been applied successfully in civil engineering works. Many studies have been conducted to investigate the performances of LECA used in s

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Abdullah, Alaa H., and Shatha D. Mohammed. "The Fire Effect on the Performance of Reinforced Concrete Beams with Partial Replacement of Coarse Aggregates by Expanded Clay Aggregates." Engineering, Technology & Applied Science Research 13, no. 6 (2023): 12220–25. http://dx.doi.org/10.48084/etasr.6412.

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This paper aims to investigate the flexural behavior of reinforced concrete beams considering fire resistance by adding Lightweight Expanded Clay Aggregates (LECA) to the concrete mix as partial coarse aggregate replacement. LECA is a type of porous clay with a uniform pore structure with fine, closed cells and hard, tightly sintered skin. The experimental work comprised four reinforced self-compacted concrete beams. All the specimens were identical in their geometrical layout of 1600×240×200 mm, reinforcement details, and support condition (simply supported). For all the beams, the main reinf

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Suraj, A. Biswas, Pathan Wasimkha., B. Katre Rahul, Mahajan Vaibhav, and Hingwe Gaurav. "Comparative Study of Strength Parameters on Concrete Made Using Expanded Polystyrene Beads, Lightweight Expanded Clay Aggregate and Waste Iron Chips." International Journal for Modern Trends in Science and Technology 11, no. 05 (2025): 174–83. https://doi.org/10.5281/zenodo.15271242.

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The increasing demand for sustainable construction materials has led to extensive research in lightweight and eco-friendly concrete alternatives. This study investigates the comparative performance of concrete mixes incorporating Expanded Polystyrene (EPS) Beads, Lightweight Expanded Clay Aggregate (LECA), and Waste Iron Chips as partial replacements for conventional coarse aggregates. The primary objective is to evaluate and compare the strength characteristics—namely compressive strength, split tensile strength, and flexural strength—of these modified concrete mixes. Standard con

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Abdullah Sikar Al-Issawi. "Effect of Implementing LECA in LWC Waffle Slabs." Journal of Information Systems Engineering and Management 10, no. 19s (2025): 668–76. https://doi.org/10.52783/jisem.v10i19s.3107.

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A two-way waffle slab system might consist of slabs with a flat flange plate or deck and two orthogonally spaced parallel beams. The key objective of using two-way ribbed (waffle) slabs is to decrease the quantity of concrete and reinforcement and, therefore, the structure's weight. This study investigates the behaviour of two-way waffle slabs that contain lightweight expanded clay aggregate (LECA) to produce LWC. Results stated that (LECA) could produce structurally lightweight concrete by completely replacing coarse aggregates. It would maintain the same compressive strength as NWC with a 26

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Ismail, Khairul Nizar, and Fatihah Halim. "Strength and Microstructural Study of Lightweight Aggregate Concrete (LWAC) Using Lightweight Expended Clay Aggregates (LECA)." Materials Science Forum 1010 (September 2020): 678–83. http://dx.doi.org/10.4028/www.scientific.net/msf.1010.678.

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Concrete is a composite material that consists of a cement and aggregate particles. Microstructure is the small scale structure of a material, defined as the structure of a prepared surface of material as revealed by a microscope. There is strong evidence that aggregate type is a factor in the strength of concrete. The objective of this research is to investigate the properties of concrete that are containing the lightweight expanded clay aggregates (LECA). Digital microscope was used to analyses the formation mechanism of microstructure in concrete. LECA were used in production of lightweight

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Zukri, Azhani, Ramli Nazir, and Ng Kok Shien. "Settlement Prediction of a Group of Lightweight Aggregate (LECA) Columns Using Finite Element Modelling." International Journal of Engineering & Technology 7, no. 4.35 (2018): 59. http://dx.doi.org/10.14419/ijet.v7i4.35.22324.

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The method of reinforcing the soft clays with stone columns is the most commonly adopted technique to enhance its load carrying capacity and to reduce settlements. Their performance with respect to bearing capacity is well researched, but the understanding of settlement characteristics still requires extensive investigations. Moreover, no studies have been made to explore the effectiveness of stone columns using Lightweight Expanded Clay Aggregate (LECA) as filler material replacing normal stone/aggregates in order to improve settlement behavior of soft clay. LECA is known as a common lightwei

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Shishkin, Andrejs, Girts Bumanis, Kristine Irtiseva, Jurijs Ozolins, and Aleksandrs Korjakins. "Clay Ceramic Hollow Sphere - Cement Syntactic Foam Composite for Building Applications." Key Engineering Materials 800 (April 2019): 228–34. http://dx.doi.org/10.4028/www.scientific.net/kem.800.228.

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The production of low-temperature clay lightweight aggregates is pursued eagerly as low energy and cost lightweight aggregate concrete (LAC) building blocks becomes more popular. Clay ceramic hollow spheres (CCHS) with waste glass (WG) additive was developed and studied as aggregate in cement composite. CCHS with diameter ranging in 6/8mm were produced by a sacrificial template technique with subsequent sintering under temperature of 900 °C and different WG content of 0, 5, 7 and 10 wt%. The effect of the sintering temperature and WG content on the physical properties and morphology of the CHS

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M, Saad, and Zena K. Abbas. "The Use of Lightweight Aggregate in Concrete: A Review." Journal of Engineering 28, no. 11 (2022): 1–13. http://dx.doi.org/10.31026/j.eng.2022.11.01.

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One of the artificial lightweight aggregates with a wide range of applications is Lightweight Expanded Clay Aggregate. Clay is utilized in the production of light aggregates. Using leftover clay from significant infrastructure development projects to manufacture lightweight aggregates has a favorable environmental impact. This research examines the expanded clay aggregate production process and the impact of processing parameters on its physical and mechanical qualities. It also looks at secondary components that can be used to improve the qualities of concrete with expanded clay aggregates. T

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