Emulsion asphalts

Asphalt emulsion using Acritamer 941 to keep the asphalt suspended and prevent it from settling out. 

Disperse the Acritamer 941 meen C-25 one at a time. Mix. asphalt to B5C. When both are molten asphalt into the water rate of addition should be no sion. Mix until uniform. Shock water jacket. 

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The major portion of sait is found in residues as these streams serve as the bases for fuels, or as feeds for asphalt and petroleum coke production, the presence of salt in these products causes fouling of burners, the alteration of asphalt emulsions, and the deterioration of coke quality. Furthermore, calcium and magnesium chlorides begin to hydrolyze at 120°C. This hydrolysis occurs rapidly as the temperature increases (Figure 8.1) according to the reaction i. ... 

Asphalt additives Asphalt emulsions Asphaltene Asphaltenes... 

Emulsions, asphaltic Emulsion stabilizers Emulsion steam drive... 

Moisture Barrier. When impregnated with an asphaltic emulsion, geotextiles become impermeable and can then be used as moisture barriers. The primary appHcation for this type of geotextile is in pavement rehabiHtation (Fig. 8). 

There are a vast number of quaternary ammonium compounds or quaternaries (1). Many are naturally occurring and have been found to be cmcial in biochemical reactions necessary for sustaining life. A wide range of quaternaries are also produced synthetically and are commercially available. Over 204,000 metric tons of quaternary ammonium compounds are produced aimuaHy in the United States (2). These have many diverse appHcations. Most are eventually formulated and make their way to the marketplace to be sold in consumer products. AppHcations range from cosmetics (qv) to hair preparations (qv) to clothes softeners, sanitizers for eating utensils, and asphalt emulsions. 

EmulsffiedAsphalts (ASTMD244). This standard covers a variety of tests for the composition, handling, nature and classification, storage, use, and specifying of asphalt emulsions used primarily for paving purposes. 

Asphalt emulsions are dispersioas of asphalt ia water that are stabilized iato micelles with either an anionic or cationic surfactant. To manufacture an emulsion, hot asphalt is mixed with water and surfactant ia a coUoid mill that produces very small particles of asphalt oa the order of 3 p.m. These small particles of asphalt are preveated from agglomerating iato larger particles by a coatiag of water that is held ia place by the surfactant. If the asphalt particles agglomerate, they could settle out of the emulsion. The decision on whether a cationic or anionic surfactant is used depends on the appHcation. Cationic stabilized emulsions are broken, ie, have the asphalt settle out, by contact with metal or siHcate materials as weU as by evaporation of the water. Siace most rocks are siHcate-based materials, cationic emulsions are commonly used for subbase stabilization and other similar appHcations. In contrast, anionic emulsions only set or break by water evaporation thus an anionic emulsion would be used to make a cold patch compound. 

For shipment in cold climates, a freezeproofing treatment using inorganic chemicals or oil spray is used. An oil spray on the inside of the coal cars is also effective at 3.8—5.7 L/car for four round trips of 1280 km each. Oil treatment has also been used for dustproofing wind loss can be prevented by use of an asphalt emulsion on the top of rail cars (6). 

Salts of a-sulfo fatty acid esters can work as emulsifying agents for the preparation of asphalt emulsions and asphalt-latex emulsions. The ester sulfonates improve the storage stability of the emulsions [101,102]. In the manufacture of lightweight gypsum products air bubbles have to be mixed into the slurries. The use of salts of sulfonated C10 l8 fatty acid alkyl esters as foaming agents produces uniformly distributed fine bubbles [103]. Salts of C10 16 fatty acid alkyl ester sulfonates can also be added to cement mixtures to prevent slump loss of the mixtures [104]. 

Asphalt chemicals, ethyleneamines application, 8 500t, 506 Asphalt emulsifier amine oxides, 2 473 fatty acid amides, 2 458 Asphalt emulsions, 10 131 Asphaltenes, in petroleum vacuum residua, 18 589-590 Asphyxiants, 21 836 Aspirating aerators, 26 165-169 compressed, 26 168-169 propeller driven, 26 168 submersible, 26 169, 170t subsurface, 26 168 Aspiratory, 11 236-237 Aspirin, 4 103-104, 104t, 701 22 17-21. See also Acetylsalicylic acid as trade name, 22 19 for cancer prevention, 2 826 Aspirin resistance, 4 104 ASP oil recovery process, 23 532-533 Assay format, competitive, 14 142 Assay limits, in Investigational New Drug Applications, 18 692 Assays, for silver, 22 650. See also... 

The properties of asphalt emulsions (ASTM D977, D2397) allow a variety of uses. As with other petroleum products, sampling is an important precursor to asphalt analysis, and a standard method (ASTM D140) is available that provides guidance for the sampling of asphalts, liquid and semisolid, at point of manufactnre, storage, or delivery. 

T0826 U.S. Filter/Zimpro Products, Powdered Activated Carbon Treatment (PACT) T0838 United Retek Corporation, Asphalt Emulsion Stabilization T0849 University of Washington, Metals Treatment by Adsorptive Filtration T0862 Vortec Corporation, Cyclone Melting System (CMS)... 

T0838 United Retek Corporation, Asphalt Emulsion Stabilization T0862 Vortec Corporation, Cyclone Melting System (CMS)... 

T0838 United Retek Corporation, Asphalt Emulsion Stabilization... 

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