US2355242A - Asphalt composition capable of cold application - Google Patents

Description

Patented Aug. 8, I I i i of setting on standing without subsequent apmaterials blended.

V 1 eral aggregate, fibrous material and other solids. point tar asphalt prepared by vacuum reduction any surface and which on standing, sets. Anard Ottawa sand were mixed with a low con- UNITED" STATES. PATENT OFFICE ASPHALT COMPOSITION CAPABLE OF COLD APPLICATION r Joseph C. Roelllger, Brooklyn, N. 'Y., assignor to Standard Oil Development Company, a corporation of Delaware No Drawing. Application December 19, 1940,

. Serial No. 370,785

2Claims. (01.106-280) Y This invention relates to improvements in the etc. On subsequent standing, the hard asphalt" preparation of asphalt compositions and Darticuand the flux knit together to form an asphalt of larly to asphaltic'compositions that maybe prethe desired consistency regulated by the type, pared and applied cold and which are capable consistency and relative percentages of the two plication of heat or pressure. For example, 51 parts by weight of a reduced It has always been desirable to have an asgas oil tar havinga viscosity of 175 Furol at 122 phaltic composition that may be used while cold F'. were mixed with 10 parts of finely divided asas a coating or bonding agent composed of miirbestos fiber and 39 parts of a 350 F. softening The high temperatures required for the applicaof a mixture of reduced and gas oil tars. This tion of relatively high consistency asphalts mixture could be readily trowelled for a period (above 100 F. softening point) becomes hazard- 'of several hours after incorporation of all the ous in certain locations where explosive vapors ingredients and when applied to a vertical metal exist. Although these asphalts may be applied .16 surfacadhered well and did not flow. This mixatordinary temperatures by' prior combination ture gradually hardened so that. after one week with a volatile solvent, this is undesirable on a substantially hard film developed. On conmany installations, especially those involving tin-ued exposure, the complete fluxing of the two porous surfaces, because of the absorption and asphaltic materials should produce an asphalt retention of the solvent for long periods after of approximately 125 F. softeningpoint and 51 application. penetration at 77 F.

It is the object of this invention to provide an With mineral aggregates similar results can be asphaltic composition that may be applied to obtained. Ninety-four parts by weightof standother object of. this invention is to provide an sistency ilux oil and after uniform coating the p altic composition that m y e ppl t proper amount 01' finely, pulverized hard asphalt a'trowel or mixed with granular materialsand was added and mixed. The total of the hard 011 subsequent Standing, form a t g of the asphalt and flux oil employed was equivalent to desired consistency. Another object of this insix parts by weight of the mixture, the relative vention is to P vide means by w i setting proportions of bothasphalts being.reg-ulated so characteristics of theasphaltic composition can that asphaltof 51/60 penetration at 77 F. would be suitably retarded to permit its storage without result on complete fluxingm Briquettes one-inch setting for o a e Pe of time a te mixhigh and two-inches in diameter were prepared ing the various ingredients. and their strength determined after various pe- According to this invention in cases where it is riods of storage at room temperature using the desired to apply an asphalt of relatively high sof- Hubbard-Field stability apparatus. The strength tening point and application cannot be made data-given below show that the rate of setting with the asphalt in a cutbackor molten-state, oi the mixtures can beregulated by changes in the following procedure can be used: a finely the source and consistency of powdered hard aspowdered, high softening point asphalt is mixed, phalt and the flux oil. a

Fluxing oil Hubbard-Field stability Hard asphalt T Furol Imme- Aiterl After 6 v m F. diately day days 1 186 S, P. reduced gas oil tar Red. gasnil tart..- 175 850 725 800 2 do T do 916 200 300 3 250 8. 1. reduced gas oil-reduced crude tardo 176 325 325 4- do: ao; 916 100 220 200 6 236/250 8. P. oxidized Venez. asp do 916 125 180 450 directly prior to use, with an asphaltic oil ofsuit- This procedure also can be employed when celable viscosity. The mixture can be applie by lulosic materials such as cork are to b bonded trowel or mixed with granular material such. as with asphaltic material since the use or high temsand, mineral aggregate, asbestos, ground" cork, i. peratures normally necessary to incorporate high characteristics .can be formed on the mineral aggregate.

I time will ensue This should consistency asphalt may have an injurious eflect oncork. I

, When the asphaltic material is tobe stored for appreciable lengths of time before use, the setting further regulated by:

l. Mixing mineral aggregate with a small amount of water containing an emulsifier such as alkali soaps, sulfonate soaps, etc., then adding a suitable quantity or low consistency fiux oil and continuing the so that an emulsion of the flux oil in the water solution of emulsifier is a high softening dispersion oi the low consistency with suitable emulsifiers first, this emulsion to the aggregate of powdered herd asphalt.

may be varied assases I Varying the ratio or water to flux oil used inthe mixture may he a means or controlling the setting characteristiw oi the final mixture, i. e., the higher the ratio of water, the slower should be the setting rate or the final mixture, within, of course, the practical limits of usage.

The proportions of hard asphalt and to result in a final asphalt of the desired consistency after the two ingredients have completely blended.

I claim:

1. An asphaltic composition which is capable of setting and hardening on standing without the application of heat or pressurewhich comprises about 51 parts by weight of a rediicednu tar having a Furoi viscosity of 175 seconds 2.11122 F., about parts of finely divided asbestos fiber and about 39 parts of a powdered petroleum as- The dispersion of the flux oil in the water may be accomplished by the use of emulsifiers such as the sulfonate soaps, or other materials with which emulsions or relatively low pH may be prepared.

be an advantage with certain aggrewhere the presence or high pH materials as sodium oleate, etc, is detrimental to the oi final asphalt film,

gates such adheeivitl phalt of 350 F. softening point tar asphalt prepared by vacuum reduction of a mixture of reduced crude and gas, oil tars.

2. An asphaltic composition of about F. softening point and about 51 penetration at 17 F. which is cap ble of setting and hardening on standing without the application of heat or pressure, which comprises about Slpartsby weight of a reduced oil tar having Furol viscosity oi seconds at 122 F; and about 39parts 0! a powdered petroleum asphalt of 350 F. softening point tar asphalt prepared by vacuum reduction of a mixture of reduced crude and gas oil tars.

JOSEPH C. ROEDIGEB.