The eruption of the Cumbre Vieja volcano on 19 September 2021, resulted in deposition large quantities volcanic ash (VA), causing a great impact citizens. This work aims to study properties this as pozzolanic raw materials establish their potential use development sustainable cement. Results chemical and technical characterization are presented. To achieve goal, Ordinary Portland Cement (OPC) w...

Recently, as a supplement of cement, the utilization of pozzolanic materials in cement and concrete manufacturing has increased significantly. This study investigates the scope to use pozzolanic wastes (slag, palm oil fuel ash and rice husk ash) as an alkali activated binder (AAB) that can be used as an alternative to cement. To activate these materials, sodium hydroxide solution was used at 1....

The cement industry has the potential to become a major consumer of recycled waste materials that are transformed and recycled in various forms as aggregates and pozzolanic materials. These recycled waste materials would otherwise have been dumped in landfill sites, leaving hazardous elements to break down and contaminate the environment. There are several approaches for the reuse of these wast...

Abstract Cemented pastefill is one of the most popular backfill types that use waste mill tailings to and stabilise mined-out voids in underground mines. Cement dosage range 3–7% added increase strength cemented serve as wall support when extracting adjacent stopes. expensive contributes significantly cost backfilling even with small dosages. Moreover, production cement energy intensive emissio...

In this study, the performance of several binary and ternary mixtures containing high-calcium fly ash other pozzolans, such as Class F silica fume, were investigated for their sulfate resistance using different sodium solutions. The mortar bars placed in a similar solution per modified ASTM C 1012/1012M (33,800 ppm SO42?) with less severe (6000 has been tested to resemble actual field duration ...

Coal-fuel power plants with semi-dry or dry flue gas desulfurization (FGD) systems produce high sulfur and/or alkali fly ashes due to comingling of ash FGD products. Such do not meet the SO3 content limit (5.0% max.) ASTM C618 are unable mitigate alkali-silica reaction. The mineralogy present in these can vary significantly (e.g., CaSO4, CaSO3, Na2SO4) based on technology used and this affects ...