Static structures (e.g. – buildings) – With means for split-prevention or damaged part repair
Reexamination Certificate
2001-03-02
2004-08-03
Friedman, Carl D. (Department: 3635)
Static structures (e.g., buildings)
With means for split-prevention or damaged part repair
C052S514500, C052S741400
Reexamination Certificate
active
06769216
ABSTRACT:
FIELD OF THE PRESENT INVENTION
The present invention relates generally to the waterproofing of a construction surface, and more particularly to a process of waterproofing a construction surface under construction and a slit of the construction surface in use.
BACKGROUND OF THE PRESENT INVENTION
With reference to
FIGS. 1
to
FIG. 4
, the conventional methods for constructing a horizontal surface
10
and a vertical surface
10
′ of a structure of cement concrete are described hereinafter.
As shown in
FIG. 1
, a horizontal reinforced screen support
12
is mounted on a horizontal molding plate
11
. Thereafter, The horizontal molding plate
11
is filled with an appropriate thickness of a cement concrete
13
, as shown in FIG.
2
. As the cement concrete
13
is dry, the molding plate
11
is removed, thereby resulting in formation of the horizontal surface
10
.
As shown in
FIG. 3
, a vertical reinforced screen support
14
is mounted on the horizontal surface
10
for building the vertical surface
10
′. A vertical molding plate
11
′ is mounted on each of two sides of the vertical reinforced screen support
14
. Thereafter, the cement concrete
13
is poured into the space located between the two vertical molding plates
11
′, as shown in FIG.
4
. Upon completion of the drying and the hardening of the cement concrete
13
, the two vertical molding plates
11
′ are removed, thereby resulting in formation of the vertical surface
10
′.
As described above, the horizontal surface
10
and the vertical surface
10
′ are not built simultaneously. As a result, a slit
15
is apt to form at the juncture between the horizontal surface
10
and the vertical surface
10
′, as shown in FIG.
5
. In light of the slit
15
, the horizontal surface
10
and the vertical surface
10
, are not waterproof. In addition, a surface crack
16
is often formed on the surface of the cement concrete after the cement concrete is dried and hardened. The formation of the surface crack
16
is often brought about by an incident in which a vibration takes place during the construction, or by an incident in which the cement is mixed with an inaccurate amount of water by the construction worker. The water may find its way into the structure via the surface crack
16
. Moreover, a plurality of cavities
17
may be formed in the process of removing the molding plates
11
and
11
′, as shown in FIG.
5
.
As shown in
FIG. 6
, the cement concrete
13
and the horizontal reinforced screen support
12
are different in nature such that they expand and contract differently in response to the changes in climatic elements, thereby resulting in formation of an interstice
18
between the horizontal reinforced screen support
12
and the cement concrete
13
. It is likely that the horizontal surface
10
may contain water pipe, has pipe, ventilation pipe of septic tank, conductor of lightning arrester, etc., and that a gap
19
may be formed between the cement concrete
13
and these pipes P. The water may find its way into the structure via the gap
19
.
As long as the slit
15
, the surface crack
16
, the interstice
18
, and the gap
19
remain, the surface of the concrete is subject to weathering. The reinforced structures are also subject to corrosion. As a result, the service life span of the structure is seriously undermined.
With reference to
FIGS. 7
to
FIG. 9
, the conventional method for waterproofing a cement concrete surface
20
is described hereinafter.
As shown in
FIG. 7
, the surface of the cement concrete surface
20
is paved with a mixture layer
21
which is formed of cement, sand and water. The surface of the mixture layer
21
is then paved with a waterproof material R, as shown in FIG.
8
. The waterproof material R has a tensile strength, a tear strength, and an expansibility. The waterproof material may be a polymer material, a waterproof blanket, a waterproof board, an oiled felt, a polyvinyl chloride film, etc. In other words, the surface of the mixture layer
21
is paved with a waterproof layer
22
.
As shown in
FIG. 9
, the surface of the waterproof layer
22
is paved with a surface layer
23
which is formed of a mortar and a plurality of bricks.
The waterproof layer
22
serves to prevent the water from finding its way into the structure. In light of the mixture layer
21
and the cement concrete surface
20
being different from each other in terms of expansion coefficient, the mixture layer
21
is apt to separate from the cement concrete surface
20
, thereby resulting in formation of a gap
24
between the mixture layer
21
and the cement concrete surface
20
, as shown in FIG.
10
. In addition, the cement concrete surface
20
is subject to displacement in the course of expansion and contraction, thereby resulting in formation of a reflection crock
211
in the mixture layer
21
. In addition, the waterproof material R of the waterproof layer
22
and the mixture layer
21
are made of different materials and are therefore different from each other in heat expansion coefficient. As a result, the waterproof material R of the waterproof layer
22
is apt to become separated from the mixture layer
21
, thereby resulting in formation of a peeled-off area “D” at the wall corners. A slit
24
is thus formed between the cement concrete surface
20
and the mixture layer
21
. Such a conventional method as described above is not cost-effective at best in view of the fact that the waterproof layer
22
must be replaced with new one every three or five years.
SUMMARY OF THE PRESENT INVENTION
It is the primary objective of the present invention to provide a process for waterproofing a construction surface and a slit of the construction surface. The process involves a first step in which the construction surface is dried by heating such that the capillary pores of the construction surface and the slit are opened up to facilitate the permeating of a synthetic asphalt into the capillary pores. Upon completion of the cooling process, the synthetic asphalt is securely implanted in the capillary pores of the construction surface and the slit of the construction surface. As a result, the construction surface is provided with a soft interface which is formed of the synthetic asphalt and is securely anchored to the construction surface. The soft interface is not apt to peel off from the construction surface and is effective in preventing the water from finding its way into the structure via the construction surface. In addition, the soft interface provides the construction surface with protection against weathering.
It is another objective of the present invention to provide a process for waterproofing a construction surface and a slit of the construction surface. The process involves the formation of a soft interface on the construction surface. The soft interface is formed of a synthetic asphalt and is intended to replace the mixture layer of the conventional process. The surface of the soft interface of the present invention may be paved with a synthetic turf, road bricks, insulation bricks, landscape pebbles, etc.
It is still another objective of the present invention to provide a process for waterproofing a construction surface and a slit of the construction surface. The process of the present invention involves the forming of a soft interface, on which a plurality of waterproof layers are paved.
REFERENCES:
patent: 1958871 (1934-05-01), Tucker
patent: 2294247 (1942-08-01), Smith
patent: 2672793 (1954-03-01), Rowe et al.
patent: 2798822 (1957-07-01), Carter
patent: 3932051 (1976-01-01), Cleary
patent: 4151025 (1979-04-01), Jacobs
patent: 4392335 (1983-07-01), Heiman
patent: 4556338 (1985-12-01), Fahey
patent: 4684288 (1987-08-01), Chapa
patent: 5660498 (1997-08-01), Freeman
Bacon & Thomas
Friedman Carl D.
Katcheves Basil
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