摘要:
A method of making a paving composition in which a primary bituminous binder containing an adhesion promotor is mixed with an aggregate. The primary binder is allowed to cure on the aggregate to form a premix of binder-coated aggregate. After such curing, the premix is then mixed with a secondary bituminous binder to form the paving composition.
摘要:
Bituminous emulsions are provided which develop good adhesion with either calcium-based aggregates or siliceous-based aggregates or mixtures thereof. The base emulsions useful in this invention are comprised of (1) bitumen, (2) a cationic emulsifier, (3) acid, and (4) water. To this base emulsion is added (1) an adhesion promoter such as tall oil, and (2) a hydrocarbon solvent to form the finished modified emulsions.
摘要:
Asphalt having a high adhesion strength is prepared by incorporating in asphalt a small amount of an aminoalkyl polyalkoxysilane expressed by the following general formula: WHEREIN R is an alkylene group having 2 to 3 carbon atoms, R'' stands for an alkyl group having one to two carbon atoms and n is an integer of 1 to 2, as antistripping agent.
摘要:
Compositions comprising cut-back, air-blown asphalt, asbestos fibers and fluidized coke derived from the refining of heavy crude oils when used to seal pavement surfaces display improved anti-skid properties and resistance to wear.
摘要:
THE METHOD OF PREPARING STORAGE STABLE DISPERSIONS OF FILLERS IN AQUEOUS CATIONIC BITUMINOUS EMULSIONS COMPRISING PRETREATING FINELY DIVIDED FILLER MATERIAL WITH AN AQUEOUS SOLUTION OF A POLYVALENT METAL SALT AND THEREAFTER MIXING THE TREATED FILLER MATERIAL WITH A CATIONIC BITUMINOUS EMULSION TO OBTAIN A DISPERSION OF FINELY DIVIDED FILLER IN THE AQUEOUS CATIONIC BITUMINOUS EMULSION, AND DISPERSIONS PRODUCED BY SUCH A METHOD. THE STORAGE STABLE DISPERSIONS OBTAINED ARE USEFUL AS FLOOR TILE ADHESIVES, ROOFING COMPOSITIONS, SOUND DEADENERS, PROTECTIVE COATINGS, INSULATING COMPOSITIONS AND THE LIKE.
摘要:
A bituminous composition, capable of being sprayed at ambient conditions and particularly useful as a soil stabilizer, including, a major proportion of a highly aromatic, bituminous material, such as thermally cracked pitch, in an amount between about 35 percent and 75 percent, a predominantly paraffinic solvent, such as kerosene, in an amount between about 15 percent and 35 percent, a predominantly naphthenic solvent, such as naphtha, in an amount between about 5 percent and 20 percent, and methylene chloride, in an amount between about 5 percent and 20 percent; and the method of preparing this composition, including, heating the bituminous material to a temperature above its melting point and pumping the same into a blending tank equipped with cooling coils and an impeller-type mixer, immediately adding the paraffinic solvent to the bituminous material at a slow rate while agitating and cooling, thereafter adding the naphthenic solvent to the mixture when the temperature of the mixture reaches a point above 25* F. below the boiling point of the naphthenic solvent, agitating and cooling the mixture until the mixture reaches a temperature between about 100 and 105* F., and slowly adding the methylene chloride, while continuing cooling to essentially ambient temperature over an extended period of time, such as 30 minutes.
摘要:
A METHOD IS DISCLOSED FOR COLORING A LIQUID BITUMINOUS MATERIAL WHICH IS NORMALLY BLACK. THE LIQUID BITUMINOUS MATERIAL IS MIXED WITH A FILLER (E.G., MONTMORILLONITE CLAY). SEPARATELY A PROTECTIVE COLLOID EMULSIFYING AGENT IS MIXED WITH HOT WATER. THE TWO MIXTURES ARE COMBINED IN A COLLOID MILL TO FORM A WATER EMULSION OF THE BITUMINOUS MATERIAL. NEXT A CLAY MASKING AGENT IS MIXED WITH THE EMULSION. FINALLY A RESINOUS SUBSTANCE (E.G., LATEX) AND A PIGMENT ARE MIXED WITH THE EMULSIONS. THE RESINOUS SUBSTANCE AND PIGMENT COAT THE INDIVIDUAL MASKED COLLOIDAL PARTICLES OF BITUMINOUS MATERIAL.