Technology and Properties of Composite Materials with Modifier of Chloride Aluminum

Abstract

The paper discusses the important issues concerning recycling of industrial sulfur waste and bottom ash. The process flow diagram was designed to form protective coatings on cement concrete by impregnation with molten sulfur, which featured high strength, performance properties and corrosion resistance. The process parameters were specified. The addition of bottom ash slag to cement concrete not only offers a means for recovering waste from thermal power stations, but also increases the material strength. Besides, the impregnation process provides low thermal conductivity for concrete while giving the material high heat insulation. A higher strength of the samples containing bottom ash slag results from a high dispersity and reactive surface of bottom ash slag. The paper investigates the influence of the electrophilic agent (aluminum chloride) on the properties of sulfur binder. It was shown that addition of aluminum chloride encouraged the formation of a more effective protective coating that gave the samples of cement concrete higher strength, density, water resistance. The electrophilic agent stimulated the synthesis process for inorganic sulfides and composite materials based on them. It was found that addition of the electrophilic agent (aluminum chloride) reduced the viscosity of molten sulfur significantly, which was attributed to the formed short-chain sulfur radicals. Such a melt has a relatively high penetration capability to ensure the formation of a high-quality protective coating.

Activating Effect of Aluminum Chloride in the Technology of Poly-Sulfides and Materials Based on them

“…This special feature of a sulfur atom is responsible for a significant portion of ionic bonds Me-S in many sulfides, as well as the formation of covalent groups Sn out of sulfur atoms, which, in particular, defines the propensity to form polysulfide phases [7][8][9][10]. A tight chemical bonding in the silicate-electrophilic activator-sulfur system provides high physical mechanical characteristics for its resulting materials [11][12][13][14][15][16]. The development of sulfur composite production addresses not only technical and economic problems but also environmental ones.…”

Sulfur Composite Materials Based on Sulfide Containing Industrial Waste

“…Sulfide ions are known to be nucleophilic activators for sulfur ring cleavage. The presence of sulfide ions CaS may help in increasing the chemical activation of sulfur, and producing calcium sulfide and sulfur composite materials with high physical mechanical properties on its basis [9][10][11][12][13].…”

“…can be explained by the formation of more compact structure where the fine filler particles (fraction of less than 0.5 mm) fill the intergranular aggregate space in the sample evenly and provide additional intermolecular bonds in the binder-filler phase boundary. A higher sand ratio in the filler (more than 20%) makes the composite density decrease by 0.3 g/cm 3 , which is likely due to the lower intensity of the bond between binder and filler [11][12][13][14].…”

Research of thermal performance properties of the wall construction products made of materials using heat power engineering waste

“…The impregnated concrete has greater compressive strength than an unprofitable, the modulus of elasticity is doubled, the greatest chemical resistance to the effects of such aggressive environment, as solutions of acids and salts [21]. It can also be noted that when processing the material, the modified sulfur melt increases frost resistance, the water absorption of the material decreases and resistance to abrasion increases [22][23][24].…”