US2417026A

US2417026A - Filling for and treatment of fractured masonry walls

Info

Publication number: US2417026A
Application number: US644299A
Authority: US
Inventors: William H Walter
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-01-30
Filing date: 1946-01-30
Publication date: 1947-03-04
Anticipated expiration: 1964-03-04

Description

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C Y u amg@ s Patented Mar. 4, 1947 FILLING FOR AND TREATMENT F FRACTUBED MASONRY WALLS William H. Walter, Lima. Ohio Application January 30, 1946, Serial No. 644,299

(Cl. 'l2-127) 'l Claims.

This invention relates to improvements in a filling for and treatment of fractured masonry walls for restraining further deterioration of the fractured structure, and weatherprooflng the repaired regions thereof.

Commonly. the walls of buildings constructed of masonry, such as those formed of bricks and the like, bonded in mortar, especially walls that are exposed to atmospheric elements and those that have been erected on weak foundations or unstable earth, become fractured along the joints between the bricks, or other structural units, due to unequal settling of the wall. In such instances, the openings of the fractures permit entrance of water therein, which upon freezing, incurs enlargement of the fracture and consequent weakening of the wall and seepage of moisture therethrough.

'I'he common practice in repairing fractured masonry walls is carried out by removing loose material from the fracture crevice and then illling the void with pointing mortar containing Portland cement, lime and sand which subsequently solidies and substantially resists relative movement between the wall sections adjoining'the fracture line. However, any continued unequal settling of the wall induces reopening of the gap between the wall sections previously separated, resulting in liability of moisture seepage through the wall, necessitating further repair.

The object of the instant invention is after removal of all loose material from between the opposing faces of the abutting bricks or blocks along the fracture line. to invest into the gap waterproofing semi-rigid materials capable of yielding to pressure, exerted thereon by the opposing faces of the fracture crevices upon continued unequal settling of the broken wall sections, and in this manner obviate reopening of the crevices and thus prevent leakage of moisture through the wall when subjected to inclement weather conditions.

Another object of the invention is, to provide a filler for the crevices in a fractured masonry wall so constituted as to yield accommodatingly and follow the movement of broken wall sections as they settle, without crumbling or cracking, and thus forestall penetration of moisture through the fracture gap.

Other objects and advantages of the invention appear in the following description.

A schematicembodiment of the invention is illustrated in the accompanying drawings, in which:

Fig. 1 is a fragmentary front elevational view of a fractured wall of masonry, portions thereof being shown in section;

Fig. 2 is a transverse section of a portion of the wall, showing the fracture crevice as it appears after a preparatory operation of filling the crevice has been performed;

Fig. 3 is a similar view of the wall as it appears after a further operation has been made; and

Fig. 4 is another similar view of the wall as it appears after completion of the filling operations.

Figs. 2, 3 and 4 are drawn `to an increased scale.

In the drawings, the front and back faces of the wall are indicatedby A and B respectively, and the cross-sectioned portions C and D illustrate the wall structure in corresponding vertical planes on the lines C and -D on Fig. 3.

In treating a fractured masonry wall in accordance with the instant invention. the fracture crevice 5, between the adjacent bricks 8, is first cleared of all rubble and the opposing faces of the bricks bordering the crevice are subjected to the action of a power or hand-operated routing tool, such as are in common use, thus to bare the l opposing fracture faces completely. Such dust or particles of material that have lingered in the crevice are readily removed therefrom by directing a Jet of compressed air into the crevice by use of any suitable known device adapted for purpose. i

After the crevice and the opposing walls thereof have been thoroughly relieved of all loose matter. the rear portion of the crevice is closed by a pack l formed of calking material luch as oakum or similar substance. The remahing exposed surfaces of the crevice walls and the inner face of the pack are then primed thoroughly with a coat 8 consisting of a mixture of boiled linseed oil and tung oil in the ratio of each. This is accomplished by use of a stiiI brush so the surfaces coated are completely saturated with the mixture to insure proper anchorage of the coating in the pores of the treated areas. After the primary coat has dried, a dense plastic ller 9 is then invested into the crevice so as to fill the midsection thereof, the operation being performed by use of any ordinary appliance (not shown). The filler consists of a mixture compounded of ingredients according to a formula, preferably as follows:

Pounds Medium oil lithopone 10 Magnesium silicate, Asbestine).. 40 Calcium carbonate 50 Short fibre asbestos 20 that more or less plastic consistency by admixture therewith of a suitable quantity of linseed oil which softens the aggregate and facilitates packing of the filler into the crevice` and furthermore increases resistance of the filler to shrinkage.

The outermost; portion of the crevice is then completely invested with a composition made up of ingredients like or similar to the formula for the filler with an added quantity of fish oil to the extent of 18% of the bulk` and constitutes a seal I for the filler and the crevice. The sealing composition preferably has included therein a coloring pigment of a hue to match that of the outer face of the wall, thus to relieve the repaired fracture of unsightliness.

Thus, the crevice is lcompletely filled with the investments, viz: The pack 1, priming coat 8, filler 9 and the seal I0, all of which are more or less compressible as well as expansible, and take up such slack as is occasioned between the opposing crevice walls caused by continued Settling of the wall sections.

The ller 9 is of greater density than that of the seal. the latter being more responsive to the force of compression and expands more freely upon widening of thegaowhile both the filler and seal adhere tenaciously to the priming coat. In this manner the crevice is tightly filled with a compressible and expansible body that is impervious to moisture which circumvents capillary seepage of moisture through the wall. l

.A distinguishing feature of the invention lies in the filling of the fracture gaps in the wall with semi-rigid materials having adhesive, elastic and impervious characteristics, the body of which has the tendency to cling to the fracture walls and remain in place, thus keeping the gap tightly closed during continued settling ofthe fractured structure.

The relative thicknesses of the pack, fillerv and seal, and the particular ingredients and proportions thereof set forth in the formulae are exemplary. Fractured crevices in masonry walls wall sections, and variations in the materials forming4 the pack, priming coat, filler and the seal may be resorted to,with respect to the proportions of ingredients and precise character thereof by exercise of skill and judgment, without departure from the invention.

What I claim is:

v1. A filling for crevices in fractured masonry walls, said filling consisting of a pack formed of calking material for the rear opening of the crevice, an adhesive coating for the inner face of the pack and adjacent walls of the crevice, a filler for the midportion of the crevice consisting of a mixture of medium oil lithopone-l lbs., magnesium silicate (Asbestine)-40 lbs., calcium carbonate- 50 lbs., short fibre asbestos-20 lbs. and linseed oil in sufficient quantity to render the mixture plastic, and a seal for the front portion of the crevice consisting of a mixture similar to that for the filler with an added amount of fish oil substantially equivalent to 18% of the aggregate.

2. In a filling for a fracture crevice =in a masonry walls, a pack of oakum or the like closing.

the rear opening of the crevice, an elastic priming coat overlying the rear face of the pack and the adjacent opposing walls of the crevice, a compressible, expansible and impervious filler in the,v

midportion of the crevice, said filler consisting of a composition containing a mixture of medium oil lithopone, magnesium silicate, calcium carbonate, short fibre asbestos and linseed oil, and a seal closing the front portion of the crevice the composition of which is similar to that of the filler with an added quantity of fish oil and having greater compressibility, expansibility and imperviousness than said filler.

3. In a filling for a fracture crevice in a masonry wall, a pack of oakum or the like closing the rear portion of the crevice, an elastic priming coat overlaying the rear face of the pack and surfaces of the fracture walls adjacent thereto.

- a compressible and expansible filler in the midportion of the crevice between said walls, and av compressible and expansible impervious seal closing the front portion of said crevice.

4. A filling disposed in the crevice of afractured masonry wall consisting of a pack closing the inner portion of the crevice, an adhesive coat overlaying the innerface of the pack and ad-v jacent fracture faces of the wall, a non-rigid ller located in the midportion of the fracture crevice adhering to said coat, and an elastic impervious seal that fills and closes the outer portion of said crevice and adheres to said coat.

vestment of a non-hardening, compressible, ex-

pansible and impervious plastic that adheres to said primer and seals the front opening of said masonry wall, the steps of removing rubble from the gap and baring the opposing walls thereof. closing the rear opening of the gap with a pack of calking material, coating the inner faces of the 'pack and adjacent walls of the gap with an adhesive primer, and then filling the gap completely with an investment of a non-hardening, compressible, expansible, and impervious substance that adheres to the primer and seals the front opening of the gap.

'7. In a method of closing the gap in a fractured masonry wall, the steps of removing rubble from the gap and baring the opposing walls thereof. closing the rear opening of the gap with a pack of calking material, investing in the midportion of the gap, a non-hardening compressible and expansible filler, and then closing the forward portion of the gap with sealing material having characteristics of the filler and being more expansible.

WILLIAM H. WALTER.

REFERENCES CITED The following references are of record in the nie of this patent:

UNITED STATES PATENTS