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Topical sealers can provide visual enhancement as well as topical protection from stains and chemicals. They require a dry, clean surface during application to gain adhesion. Topical sealers may alter the coefficient of friction which can make substrates slick when wet – a condition that can be remedied by adding anti-skid materials.
A fairly well-defined reaction front can often be observed in thin sections; ahead of the front the concrete is normal, or near normal. Behind the reaction front, the composition and the microstructure of concrete are modified. These changes may vary in type or severity but commonly include: Extensive cracking; Expansion
Polypropylene fibres are used as a concrete additive to increase strength and reduce cracking and spalling. [49] In some areas susceptible to earthquakes (e.g., California), PP fibers are added with soils to improve the soil's strength and damping when constructing the foundation of structures such as buildings, bridges, etc. [ 50 ]
Anti-scratch coating is a type of protective coating or film applied to an object's surface for mitigation against scratches. Scratches are small surface-level cuts left on a surface following interaction with a sharper object.
The best way to test the weldability of filler material is to compare weld strength to resin strength. [17] This can be hard to do since many filler materials contain different level of additives that change the mechanical behavior.
The additives include sugar, starch, carbons, wood flour and phenolic resins. Water glass is a useful binder for solids, such as vermiculite and perlite . When blended with the latter lightweight fraction, water glass can be used to make hard, high-temperature insulation boards used for refractories, passive fire protection , and high ...
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