Abstract

            In this work, it is proposed to study, in concrete the adequacy of seashells as a partial replacement for coarse aggregates. In Countries that are highly developing and where concrete is largely used, the high and ever-increasing cost of concrete has made construction very expensive. The high cost of conventional building materials is a major factor affecting the delivery of homes in the World. This, combined with the adverse effect of concrete production on the environment, has led to studies on various materials that could be used as a partial replacement for coarse aggregates and cement. This necessitated research on alternative building materials and analysis of characteristics of resistance to the traction and compression of concrete produced using seashells as substitutes for conventional coarse aggregates with partial replacement in M30-grade concrete. The main objective is to encourage the use of these products as low-cost building materials. In this work, experiments have been carried out with the collection of the necessary materials, and the data required for the design of the mixture has been obtained by sieve analysis and specific gravity tests. The sieve analysis was conducted from various fine aggregates (FA) and coarse aggregate (CA) samples and the sample that is appropriate for the requirement was selected.       Pond ash is the by-product of thermal power plants, which is considered waste whose disposal is a major environmental problem requiring many disposal zones. In fact, there are three types of ashes produced by thermal energy (1) fly ash, (2) bottom ash, and (3) pond ash. Fly ash is collected mechanically or through electrostatic precipitators of combustion gases from power plants, while the chewers are collected from the bottom of the boilers. When these two types of ash are mixed together, transported in the form of manure, and stored in the lagoons as deposits, it is called pond ash. The volume of ash from the pond produced by thermal power plants is very large compared to the other two ashes, namely, fly ash and Clinker. The task of making the most of the ashes of the pond remains a major task problem around the world. To solve the problem, pond ash has been used in the present work as a partial replacement for cement in concrete production.

KEYWORDS: Seashell, Pond ash, Compressive strength, Flexure strength, split tensile strength, coastal areas.