HBRP Publication Page 1-4 2020. All Rights Reserved Page 1 Journal of Structural Engineering, its Applications and Analysis Volume 3 Issue 3 e-ISSN: 2582-4384 Preparation of Lightweight Concrete by using of LECA Aggregates Manish Yadav 1 , Shakti Kumar 2* 1 Student, 2 Assistant Professor Department of Civil Engineering, Bansal Institute of Engineering and Technology, Lucknow, Uttar Pradesh, India. *Corresponding Author E-mail Id:-shaktikumar.kumar21@gmail.com ABSTRACT This report expresses influence of LECA in the concrete. In this report LECA is used as a replacement of coarse aggregate construction of lightweight aggregate in the essential need of our society. It reduces total weight of structure which is very helpful in the construction of high rise building by using lightweight concrete 20 to 30% dead load of building is reduced. LECA is use in concrete to reduce the required amount of coarse aggregate and furthermore in the design of concrete based structures, hence self weight occupies extremely great portion of load coming on to the structures, critically in cases such are weak soil or tall structure. Coarse aggregate is replaced 21% by using LECA. In this experimentation, concrete cubes are casted at water cement 0.34, 0.40 and 0.42 correspondingly. These cubes are tested for compressive strength, result of these cubes for compressive strength are very pleasing at water cement ratio 0.42. This experimentation shows behaviour of lightweight concrete at different water cement ratio for a fixed substitution of coarse aggregate such as compressive strength. After this experimentation, all the aim of such research is done. Keywords:-LECA, water cement ratio, compressive strength, water absorption. INTRODUCTION Lightweight concrete is used to construction lightweight structure, in high rise building and where bearing capacity of soil is not sufficient to carry heavy load by using lightweight aggregate. Lightweight concrete is formed in different forms LECA, used as replacement of coarse aggregates up to 21% for lightweight concrete. It is not as strong as concrete made with distinctive aggregates. Lightweight concrete, used where high quality concrete is needed and vital necessity is lightness of structure. There are numerous complimentary circumstances of lightness over typical concrete. These are also utilized owing to its low warm conductivity, which comes about becomes of its high void substance for air entrainment is frequently utilized as a fraction of lightweight concrete to reduce the density, boost workability and imperviousness to frost and to lessen warm conductivity. It is very essential to proper control on quality of work. In this experiment LECA is used 21% as coarse aggregate. Cubes are constructed W/C ratio 35%, 40% and 42% respectively, for each W/C ratio 3 cubes are formed. MATERIAL AND ITS PROPERTIES LECA LECA is abbreviation of LECA is light expanded clay aggregate. LECA is product of clay and poor line which is dried fired in rotary kilns.