PROSPECTS OF USING COFFEE WASTE FOR THE PRODUCTION OF ECOLOGICAL CONCRETES AND MORTAR

Abstract

approaches to enhance the value of coffee industry by-products in the formulation of sustainable concretes and cement mortars.

The areas of application of coffee grounds in the production of ecological concretes and cement mortars are summarized. Five main areas of use are highlighted: pozzolanic additives that replace part of the cement; organic fibers that can improve crack resistance; rheological additives; modifiers or corrective additives; partial replacement of fine aggregates in the cement mixture.

A detailed analysis of experimental studies demonstrates how partial replacement of fine aggregates or cement with coffee waste can change key material properties, including density, compressive strength, thermal conductivity, shrinkage behavior and durability indicators such as water absorption.

In addition to technical characteristics, the environmental benefits of this approach are critically evaluated. Indeed, the use of coffee waste achieves the dual benefit of diverting organic waste from landfills and simultaneously reducing material costs.

Finally, we outline promising directions for future research, including optimization of mix design, long-term durability studies under different environmental conditions. By reflecting the current state of the art and pinpointing knowledge gaps, this review aims to guide materials scientists, civil engineers, and sustainability practitioners toward unlocking the full potential of coffee waste as a resource for sustainable building materials.