Alkali-activated slag (AAS) is a promising cementing material for winter construction due to its continuous hydration at sub-zero temperature. In order obtain higher mechanical strength of AAS mortar in construction, the most efficient alkali activator should be selected. Potassium silicate and sodium as alkaline activators possess high rate ordinary showed different properties because cations,...

Abstract While natural resources are becoming scarce and climate change is accelerating, the recovery recycling of wastes by-products an effective way to deal with economic ecological constraints recent decades. The valorization industrial in civil engineering a common practice either by their incorporation during manufacture Portland cements or as partial replacement cement production concrete...

Earth-based materials have shown promise in the development of ecofriendly and sustainable construction materials. However, their unconventional usage field makes estimation properties difficult inaccurate. Often, determination is conducted based on a conventional procedure. Hence, there inaccuracy understanding To obtain more accurate properties, support vector machine (SVM), artificial neural...

Abstract In recent years, manufactured sand produced from crushed rock has been used as fine aggregate instead of natural in construction and industrial fields to minimize the impact depletion nature society. this research, mechanical properties durability alkali-activated sustainable mortar using different sodium silicate (solution) precursor ratios (SSPR; 0.60, 0.65, 0.70, 0.75, 0.80) by weig...

Abstract In this study, glass wool waste was utilized by means of alkali-activation with blast furnace slag. Reaction kinetics, workability, mechanical properties and autogenous shrinkage alkali-activated slag were comprehensively studied. Results indicated an optimal modulus (SiO2/Na2O) the activator related to a long enough setting time high reaction degree paste. The incorporation as partial...

A basic investigation into whether a geopolymer can be utilized as part of an artificial barrier during radioactive waste disposal was conducted in this study. Geopolymers are comprised primarily alumina and silica, they exhibit negligible leaching owing to the absence calcium. Studies on geopolymers limited compared those other cementitious materials because physical characteristics vary with ...

Abstract Rheology of alkali-activated slag (AAS) is a very complex issue, where the activator nature as well its dose play an important role. Moreover, use water-reducing admixtures in these systems they often do not work properly. This could be attributed to high pH surface chemistry AAS. Therefore, lignosulfonate-, polynaphthalene- and polycarboxylate-based superplasticizers were used modify ...

Alkali-activated slag cements (AAS) are considered as an alternative to portland cement (PC) in many studies. A significant number of studies have focused on their mechanical and durability properties, but very few concentrated rheological behavior. In this study, the effects sodium silicate hydroxide properties structural build-up alkali-activated GGBFS mixtures been investigated. The silicate...

The construction world has changed day by and is becoming more digitalized introducing new technologies. Three-dimensional concrete printing (3DCP) one such technology that automated building process along with several benefits as reduced material waste, human hazard, time savings. Traditionally, this technique utilizes cement to construct numerous structures, resulting in a significant carbon ...

Specimens of geopolymeric concrete on basis waste iron ore enrichment Dashkesan’s deposit and bottom ash combustion domestic were obtained. Herewith ratio mixture to binder made up 80:20. At obtaining geoconcrete specimens the concentration in was variated limits 10-50%wt. Normality water solution alkali activator from 1N 8N. Maximal values absorption containing 10, 20, 30, 40 50%wt correspondi...