Phenolic mortars fillers

The phenolic mortars provide resistance to high concentrations of acids and to sulfuric acid at elevated temperatures. Fillers for the phenolic mortars are 100% carbon, 100% silica, or part carbon and part silica. For high concentration of sulfuric acid, silica is the filler of choice. Carbon fillers are used where resistance to high concentrations of hydrofluoric acid is required. Table 7.10 lists some typical compatibilities of phenolic mortars. 

Although the use of simple diluents and adulterants almost certainly predates recorded history, the use of fillers to modify the properties of a composition can be traced as far back as eady Roman times, when artisans used ground marble in lime plaster, frescoes, and po22olanic mortar. The use of fillers in paper and paper coatings made its appearance in the mid-nineteenth century. Functional fillers, which introduce new properties into a composition rather than modify pre-existing properties, were commercially developed eady in the twentieth century when Goodrich added carbon black to mbber and Baekeland formulated phenol— formaldehyde plastics with wood dour. 

Phenolic resins are not used in monolithic surfacings in grouts or in polymer concretes but are extensively used in mortars. They are two-component systems as are the furan resins using 100% carbon filler, or 100% silica filler, or part carbon and part silica filler. Like the epoxies, the phenolic resins can be allergenic to sensitive skin. Protective clothing should be worn by persons handling the phenolic resins. Phenolic resins have a limited shelf life and must be stored at 45°F (7 C). 

An improved phenolic resin mortar. Resistant to non-oxidizing acids, weak alkalies, and most organic solvents. Supplied with either silica or carbon filler. 

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