Effect of alkali activator concentration and curing condition on strength and microstructure of waste clay brick powder-based geopolymer

Properties of Inorganic Polymers Produced from Brick Waste and Metallurgical Slag

“…Also, the (SiO 2 + Al 2 O 3 )/Na 2 O ratio in the reactive paste obtains an optimum value ( Figure 2) which results in the highest compressive strength, due to the higher degree of hydrolysis and dissolution of Si and Al that polymerize and polycondensate. Higher or lower ratios indicate deficiency or excess of the activating solution and normally result in the production of IPs with lower compressive strength [34]. To be mentioned here also, is that the application of mild manual pressure on the paste during casting results in specimens with increased compressive strength.…”

Positive Influence of Liquid Sodium Silicate on the Setting Time, Polymerization, and Strength Development Mechanism of MSWI Bottom Ash Alkali-Activated Mortars

“…Moreover, a large number of scattered particles (BA and GGBFS) can still be observed beneath the massive gel (as shown in (C) of Figure 3 (b-2)). This further indicates that BA and GBFS particles are not involved in the self-coagulation reaction of liquid sodium silicate and they could not polymerize in an environment with low pH [ 34 ]. Since the strength of sample A-5 (only activated by liquid sodium silicate) only originates from the self-condensation of liquid sodium silicate, BA and GGBFS particles were only inert fillers.…”

Property Comparison of Alkali-Activated Carbon Steel Slag (CSS) and Stainless Steel Slag (SSS) and Role of Blast Furnace Slag (BFS) Chemical Composition

“…The phase transitions (including molecular and molecular bond structures) of alkali-activated CSS and SSS can be studied by FT-IR [38,46]. Figure 9 shows the FT-IR spectra (spectral range = 400–4000 cm −1 ) of C2-29-0, C2-29-50, S2-29-0, S2-29-50 at different ages.…”