Abstract The interest in inorganic foundry binders has been rising steadily recent times due to their favorable environmental characteristics. This paper compares the mold quality and cast attained with different binders. Three types of sand five were used for study. Of binders, there was liquid sodium silicate hardening methods, a geopolymer binder, also solid silicate. assessed through bendin...

The relationship between composition, structure, and resistance to fracture remains poorly understood. Here, based on molecular dynamics simulations, we report that 1 sodium silicate glasses (NS) and calcium–silicate–hydrates (CSH) feature an anomalous maximum in fracture toughness. In the framework of topological constraint theory, this anomaly is correlated to a flexible-to-rigid transition, ...

The mineral harmotome (Ba,Na,K)1-2(Si,Al)8O16⋅6H2O is a crystalline sodium calcium silicate which has the potential to be used in plaster boards and other industrial applications. It is a natural zeolite with catalytic potential. Raman bands at 1020 and 1102 cm(-1) are assigned to the SiO stretching vibrations of three dimensional siloxane units. Raman bands at 428, 470 and 491 cm(-1) are assig...

It is a well-known fact that the spectra of oxygen-rich circumstellar dust envelopes around evolved stars show great diversity, especially in the 10 μm silicate band profiles, but also in the longer infrared wavelength range covered by ISO. This supports earlier conclusions that the concept of a universal cosmic silicate is inadequate and that it is reasonable to consider a wider variety of pos...

Purpose.Influence of preheating temperature and sodium silicate solute content in sand-sodium-silicate mixtures structured by SMS-process on their destruction work under knock loading action has been established. Methodology. Quartz sand brand 1K2O202, water, with specific gravity 1.42…1.44 g/cm3 modulus 2.8… 3.0 have used this work. Mixtures structuring realized microwave furnace frequency 2.4...

In this paper, the influence of water glass types, modulus glass, alkali content, consumption, and plant fibers on mechanical strengths alkali-activated blast furnace slag powder (BFS) is investigated. Moreover, fiber types pretreatment measuring temperature performance BFS are further considered. Results indicate that activated by potassium silicate shows higher than sodium silicate. The with ...

The focus of the study was to identify stress strain behavior geo polymer concrete and salient parameters that influence mixture proportions properties low calcium fly ash- based polymers concrete. To develop geopolymer chemical are alkaline liquid solution/fly-ash ratio=0.5, Sodium silicate/sodium hydroxide ratio=2.5,16M NaOH SiO 2 /Na O ratio=2.0. mixes have shown improved values for same lev...