Experimental studies on mechanical and durability characteristics of lc₃ concrete

Abstract

In the present day context utilization of natural resources is increasing day by day, which is a burden for future generations. Limiting the usage of natural raw materials and development of sustainable methodologies is needed in all aspects of construction activities. In this regard, manufacturing of cement requires large amount of limestone deposits, fuel energy and on the other hand cement manufacturing liberates carbon dioxide (CO2) into atmosphere. Liberation of CO2 results in global warming which leads to climatic changes. Hence there is a need to develop an alternative material superior to cement without compromising its properties. To address the above problem present study is focused on examining the usage of Limestone Calcined Clay Cement (LC3) as partial replacement to clinker to an extent of 50% in concretes. M 30 grade of concrete is considered for investigation with three types of binders (i.e. LC3, Ordinary Portland Cement (OPC) and Pozzolana Portland Cement (PPC). From the studies on strength and durability it is evident that the performance of LC3 concrete is better than OPC and PPC based concrete.

Recent Progress in Limestone-Calcined Clay Cement (LC3): A Review

“…High-purity kaolinite in clay is not essential for adequate workability and early-age strength. Clay of 40% kaolinite content can be sufficiently acceptable together with modifying the fineness of cement [1]. The experimentations on combining calcined clay and limestone have intensified to propose a new green blended cement, typically consisting of 50% clinker,30% calcined clay, 15% limestone, and 5% gypsum [17,18].…”

“…Restricting the consumption of natural raw materials and developing sustainable production strategies are mandatory in all construction activities [1]. According to globally confirmed reports, carbon emissions will reach about 2 trillion tons in the next 50 years, inducing 4 •C of warming [2].…”

“…According to globally confirmed reports, carbon emissions will reach about 2 trillion tons in the next 50 years, inducing 4 •C of warming [2]. Cement manufacturing requires a large portion of limestone deposits and fuel energy causing carbon dioxide (CO2) liberation into the atmosphere [1]. Cement production is responsible for 5-7% of global emitted CO2 and 3% of global greenhouse gas emissions [3].…”