Strength and Durability Characteristics of Cement-lime Mortars with Fly Ash and Slag as Aggregate Substitutes

Abstract

The global consumption of sand by the concrete industry has increased significantly over the years. Natural sand has become a desired commodity in numerous regions of the world. To protect both the existing resources of natural sand and utilize waste materials, drastic actions are urgently needed. The production of cement mortars, which are solely based on fine aggregate, is responsible for the large consumption of natural sand. In the described research program, we proposed to substitute 50 % of the natural sand in mortars with fly ash and slag. The strength properties and durability characteristics of the new mortars were tested. It was proved that mortars with fly ash and slag can be used for specific applications in civil engineering. Areas for future research associated with the mortars in question were also pointed out.

Using Cementitious Materials to Enhance Concrete Properties and Improve the Environment: A Review

“…Some researchers used two or three types of cementitious materials to replace cement in concrete mixes. The impact of these materials relies on their characteristics and proportions [65]. Mohammad et al [66] studied the influence of replacing cement with fly ash alone, GGBFS alone, and a mix of them on rheological properties and strength of SCC.…”

“…Nasr et al [65] inspected the effect of replacing 50 % of cement with binary combinations of silica fume and fly ash or metakaolin and fly ash on the properties of RPC. The findings illustrated that a blend of 20 % silica fume and 30 % fly ash raised the flowability more than the other mixes.…”