Although Portland cement is the most widely used binder in the stabilisation/solidification (S/S) processes, slag-based binders have gained significant attention recently due to their economic and environmental merits. In the present study, a novel binder, reactive MgO activated slag, is compared with hydrated lime activated slag in the immobilisation of lead and zinc. A series of lead or zinc-...

This paper explores the sustainability aspects of binders used in concrete 3D printing. Firstly, a prospective approach to conduct sustainability-assessment based on life cycle printed structures is presented, which also highlights importance considering functional requirements mixes for The potential material production phase emphasized enhance 3DCP by reducing embodied impacts. literature dif...

Ground granulated blast furnace slag is widely used as a mineral admixture to replace partial Portland cement in the concrete industry. As the amount of slag increases, the late-age compressive strength of concrete mixtures increases. However, after an optimum point, any further increase in slag does not improve the late-age compressive strength. This optimum replacement ratio of slag is a cruc...

calcium aluminates (ca) are the most important hydraulically setting cements used for preparing refractory castables, because they develop high strength at very early ages after placements.  the anhydrous phases of this kind of cements are ca, ca2 and traces of c12a7 and alpha-alumina. the major hydraulic phase in all of the ca cements including ciment fondue is ca. once hydrated, it starts to ...

The cementitious materials under consideration by Caltrans for rigid pavement construction may be classified into four categories: Portland cements and blends, calcium aluminate cements and blends, calcium sulfoaluminate cements, and fly ash-based cements. With the exception of Portland cements, most of the cementitious materials under consideration have not been extensively used for pavement c...

Concretes mixed with seawater are characterised by enhanced performances, but action of chlorides and sulfates ensures the risk reinforcement corrosion. Application high consistency fresh concretes changes in hardened concrete structure that causes problem steel passive state ensuring. Thus mixing plasticized actualizes search for means corrosion prevention. Alkali-activated slag cements (furth...

The secondary aluminum ash is the black slag left after primary extracted from metal aluminum. To address environmental pollution and resource waste caused by accumulation landfill of ash, this study fabricated non-fired bricks using as principal raw material, which was supplemented cement, slaked lime, gypsum engineering sand. effects mix proportions various admixtures on mechanical properties...

Argon oxygen decarburisation (AOD) slag may be used for phosphorus (P) removal, as its high pH and weatherable calcium (Ca) minerals provide sufficient Ca(2+) and OH(-) for calcium phosphate (Ca-PO4) precipitation. This study examined the P removal performance of AOD slag for use as wastewater treatment material. Batch experiments were carried out using both synthetic P solution and real wastew...

In this study, the treatment of fly ash and steel making slag in aqueous ammonia chloride has been conducted. These zero-value wastes have distinctively high concentrations of magnesium, calcium and iron. The ammonium chloride has been employed as the leaching reagent to extract MgO out of fly ash and slag, and the dissolved cations in the leachate were subsequently precipitated by carbonation....