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Norwegian concrete prism method (storage at 38 °C). Known affected structures Surface of a concrete pillar of the building of the National Gallery of Canada at Ottawa presenting the typical crack pattern of the alkali-silica reaction (ASR). Note the typical fatty aspect of the yellow silicagel exudations imbibing the concrete surface along the ...
Concrete sealer. Concrete sealers are applied to concrete to protect it from surface damage, corrosion, and staining. They either block the pores in the concrete to reduce absorption of water and salts or form an impermeable layer which prevents such materials from passing. [1]
Lestoil. Lestoil is a registered trade name of Clorox for a heavy-duty multipurpose cleanser product, used to remove extremely difficult laundry stains, dissolve water-based and oil-based paints, and clean grease, oil, paint, and adhesives from floors and surfaces. It was introduced as a dry cleaning fluid for laundry in 1933. [1]
To produce concrete, fresh plant material is extracted with nonpolar solvents. On evaporation of the solvent, a semi-solid residue of essential oils, waxes, resins and other oil-soluble plant chemicals remains. The solvent used for extraction must be chosen carefully regarding its polarity and boiling point. If the boiling point is too high ...
Dosage of defoamer. A defoamer or an anti-foaming agent is a chemical additive that reduces and hinders the formation of foam in industrial process liquids. The terms anti-foam agent and defoamer are often used interchangeably. Strictly speaking, defoamers eliminate existing foam and anti-foamers prevent the formation of further foam.
The distilled oil solidifies in the receiver as a wax-like and cream-colored mass known as orris concrete. It is solid because of the high content of myristic acid (85%), a white stearin -like substance. [1] Orris concrete melts when it reaches around body temperature. It has a woody, fatty-oily, yet distinctly violet-like odor: sweet floral ...
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