Cleaner Materials (Jun 2022)
Carbonation resistance of blended mortars and industrial by-products: A brief review
Abstract
Carbonation is one of the significant durability properties of cement mortar. Conventional mortar is generally made up of cement and sand, but blended mortar is formed by partial substitution of cement with certain pozzolanic materials. Consumption of industrial-by-products in developing of mortar is a footstep towards economic and sustainable construction and it also results in probable reduction of excessive carbon footprint and simultaneously deals with major environmental problems i.e., safe disposal of industrial by-products, reduction of pollution by dropping the amount of Portland Cement (PC) and lowering the exploitation of natural resources. The studies investigating carbonation resistance of mortar blended with industrial-by-products are uncommon till date. The current literature reviews the carbonation resistance of blended mortar made with incorporation of various industrial by-products (namely- silica fume-SF, fly ash-FA, ground granulated blast furnace slag-GGBS, coal bottom ash-CBA etc.). Out of all industrial by-products blended mortars containing SF exhibit highest carbonation resistance followed by FA, GGBS and CBA. The carbonation depth has been decreased up-to the range of 10% with the incorporation of various industrial mortars. Based on the existing trends, the current area requires more devotion as significant number of investigations has favoured the use of aforesaid by-products as partial replacement of PC in refining carbonation resistance.
