This work studied the effect of alkali activated slag-fly ash (AASFA) material on adhesive interface mechanical properties and chloride permeability repaired ordinary concrete. The splitting tensile strength diffusion coefficient bonding surface using three methods were compared: direct repair concrete (method I), agents cementitious slurry alkaline followed by with II), III). microstructure in...

Aimed to achieve “waste control by waste” of coal-to-liquids (CTL) industry, coal gasification residue (CGR), the most typical CTL residue, and chemical wastewater (CCW) were used as aluminosilicate precursor auxiliary activator respectively prepare alkali activated materials (AAMs). CGR-based AAMs using a less concentrated NaOH solution than conventional, with CCW mixing water synthesized. The...

In this study, the effects of limestone powder on rheological behavior, pore solution chemistry, mechanical properties and microstructure alkali-activated cements have been investigated. The results exhibit that, with increasing content in ternary system, structural build-up mixture increases earlier. It was observed that flow curves pastes fit Bingham model well. With fly ash mixtures, plastic...

Excessive consumption of cement in construction materials has resulted a negative impact on the environment. This leads to need finding an alternative binder as sustainable material. Different wastes that are rich aluminosilicates have proved be valuable material for alkali-activated product development, which contains zero cement. Alkali-activated products claimed and cost-effective. In presen...

Concrete is responsible for a significant share of global GHG emissions, which can be mainly ascribed to the production clinker. Alkali-activated concretes have been investigated in literature as possible alternative, but sustainability still appears reduced by high embodied energy chemicals typically used activation step. This paper investigates concrete belonging strength classes 35, 50 and 7...

The effect of alkali content (% K2O + %Na2O) on the mechanical properties of alkali activated blast furnace paste has been investigated. The paper presents the study on workability, compressive strength, split tensile strength and microstructure of alkali activated blast furnace slag paste specimens prepared by using of sodium silicate and potassium hydroxide solution as activators. The experim...