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CROSS-REFERECE RELATED TO RELATED APPLICATIONS 
     Not Applicable. 
     STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
     Not Applicable 
     REFERENCE TO SEQUENCE LISTING, A TABLE, OR A COMPUTER PROGRAM LISTING COMPACT DISK APPENDIX 
     Not Applicable 
     BACKGROUND 
     Pavement maintenance is the key to pavement preservation. Effective pavement preservation programs integrate many maintenance strategies and treatments, such as preventive, corrective and emergency maintenance. However, a common practice in construction, core hole testing, and often leaves newly constructed roadways vulnerable to premature damage that can inhibit effective pavement preservation. There is no doubt that asphalt pavement needs to be tested for evaluation, verification and research purposes, and that core hole testing is a cost-effective and diagnostic method by which to verify asphalt properties, as dictated by the specifications, such as thickness, structural integrity, specific gravity, air void content and percent compaction. Nonetheless, State agencies currently enforce specific procedures for asphalt core hole restoration. 
     BRIEF SUMMARY OF THE INVENTION 
     The lack of proper protection of the restored asphalt core holes leads to multiple potential asphalt failures, such as cracking, spalling, potholes, dispersion of top surface of the core hole restoration material which will result to scattering of debris throughout the roadway, disintegration of restoration material from the existing paved structure and poor physical appearance. The need of inventing a new device to improve the core sampling post-construction procedures is crucial. The inventor discerns that the current construction practice for asphalt core hole restoration does not require protection to the top surface of the restoration material and tips and edges of the existing structure resulting from core drilling, proper compaction to the restoration fill material or application of emulsifying asphaltic bonding agent. The invention of a cap device for asphalt core holes should protect asphalt core holes and the restoration material, provide better compaction for the asphalt core restoration material and provide the space for the application of a bonding agent between the core hole fill material and the existing surface. This invention provides a useful cap device to protect the restored asphalt core hole. As resolved by the inventor, a cap for protecting fill material of asphalt core hole comprises a top plate, a hollow tubular member. The tubular member is attached to the top plate, and the tubular member is substantially perpendicular to the top plate. Also, resolved by the inventor is a method to protect a asphalt core hole, which comprises the steps of placing fill materials to fulfill an asphalt core hole, forming a top of the fill material, placing a circular cap on the top of the fill material, forming a gap between the circular cap and the asphalt core hole, compacting the fill material by putting pressure on the circular cap, filing a bonding agent into the gap, leaving the circular cap in the asphalt core hole at least one day and no more than 3 days, removing the circular cap from the asphalt core hole, creating a void space from the removal of the circular cap, and filing an emulsifying bonding agent into the void space to fulfill the asphalt core hole. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a cap according to some embodiments; 
         FIG. 2  is section view of a cap according to some embodiments; 
         FIG. 3  is a perspective view of a cap according to some embodiments; 
         FIG. 4  is a section view of a cap according to some embodiments; 
         FIG. 5  is a plan view of an embodiment of the method to protect an asphalt core hole; 
         FIG. 5A  is a section view of an embodiment of the method to protect an asphalt core hole; 
         FIG. 6  is another plan view of an embodiment of the method to protect an asphalt core hole; 
         FIG. 6A  is another section view of an embodiment of the method to protect an asphalt core hole. 
     
    
    
     DETAILED DESCRIPTION 
     Before the present invention is described in greater detail, it is to be understood that this invention is not limited to particular embodiments described, and as such may, of course, vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting, since the scope of the present invention will be limited only by the appended claims. 
     Where a range of values is provided, it is understood that each intervening value, to the tenth of the unit of the lower limit unless the context clearly dictates otherwise, between the upper and lower limits of that range is also specifically disclosed. Each smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in that stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range, and each range where either, neither or both limits are included in the smaller ranges is also encompassed within the invention, subject to any specifically excluded limit in the stated range. Where the stated range includes one or both of the limits, ranges excluding either or both of those included limits are also included in the invention. 
     Unless defined otherwise, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention, some potential and exemplary methods and materials may now be described. Any and all publications mentioned herein are incorporated herein by reference to disclose and describe the methods and/or materials in connection with which the publications are cited. It is understood that the present disclosure supersedes any disclosure of an incorporated publication to the extent there is a contradiction. 
     It must be noted that as used herein and in the appended claims, the singular forms “a”, “an”, and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a plate” includes a plurality of such plates and reference to “the peripheral portion” includes reference to one or more peripheral portions, and so forth. 
     It is further noted that the claims may be drafted to exclude any element that may be optional. As such, this statement is intended to serve as antecedent basis for use of such exclusive terminology as “solely”, “only” and the like in connection with the recitation of claim elements, or the use of a “negative” limitation. 
     As will be apparent to those of skill in the art upon reading this disclosure, each of the individual embodiments described and illustrated herein has discrete components and features which may be readily separated from or combined with the features of any of the other several embodiments without departing from the scope or spirit of the present invention. 
     Referring to  FIG. 1  a cap  10  has a top plate  20  and tubular member  30 . Top plate  20  can be substantially circular, rectangular, or square. Tubular member  30  can be substantially circular, rectangular, or square. Cap  10  is made of material, such as cast iron, steel, high strength aluminum, high strength plastic that can sustain vehicular weight, such as 4-axle trucks, 6-axle trailer or bulldozer. Top plate  20  is attached to tubular member  30  by methods known to the person having the skill of art such as welding, screwing, bolting, adhesion, or forging ways. Top plate  20  and tubular member  30  can be different materials; however, it is also understood that even though the cap comprises two parts, top plate  20  and tubular member  30 , the cap can be made with one piece such as casting or molding. 
     Referring to  FIG. 2  one embodiment of a cap  10  shows a top plate  20  having an upper side  22  and bottom side  24 , a tubular member  30  having a top edge  32 , a tubular body  34 , and bottom edge  36 , where tubular body  34  is substantially axially hollow. Also referring to  FIG. 2  one embodiment of a cap  10  shows that upper side  22  of top plate  20  and a opposed bottom side  24  of top plate  20 , where opposed bottom side  24  is connected to top edge  32  of tubular member  30 . And, tubular member  30  is substantially perpendicular to top plate  20 . Also referring to  FIG. 2  an optional coating material  26  is attached to upper side  22  of top plate  20 . The coating material  26  can be abrasive material such as rubber, plastic, or combination of two. Also referring to  FIG. 2  hole  50  is formed through top plate  20  allowing insert of tools, such as screw driver, pry bar, or steel bar, to remove cap  10  from an asphalt core hole (not shown). Referring to  FIG. 3  another embodiment of cap  10 , top plate  20  has a central portion  40  and peripheral portion  42 . Also referring to  FIG. 3  an embodiment of cap  10  has a tubular member  30 . 
     Referring to  FIG. 4 , an embodiment of cap  10  shows that central portion  40  and peripheral portion  42  form an angle a between 0 degree to 90 degree, and where the angle a is formed on the bottom side  24  of the top plate  20 . Also referring to  FIG. 2  an optional coating material  26  is attached to upper side  22  of top plate  20 . The coating material  26  can be abrasive material such as rubber, plastic, or combination of two. Also referring to  FIG. 4  tubular member  30  is substantially hollow where the inner diameter of tubular member  30  is approximately 5.5 inches and the outer diameter of tubular member  30  is approximately 6 inches, and where the length of the tubular member  30  is approximately 2 inches. Also referring to  FIG. 4  a hole  50  is formed through the top plate  20  for allowing insert of tools, such as screw driver, pry bar, or steel bar, to remove cap  10  from an asphalt core hole (not shown). 
     Referring to  FIGS. 5 and 5A  a cap  10  is placed inside an asphalt core hole  100  formed in an existing asphalt structure  102 . Referring to  FIG. 5A , fill material  110  has been placed to fulfill the asphalt core hole  100 , and in where cap  10  is placed on top of fill material  110 . Referring to  FIG. 5A  fill material  110  is compacted by pressed down cap  10 , and cap  10  is force into asphalt core hole  100  by hammering or other forceful way. Referring to  FIGS. 6 and 6A  cap  10  (not shown) is removed from asphalt core hole  100  in asphalt pavement  102 . Referring to  FIG. 6A  emulsifying bonding agent  120  is filled between fill material  110  and the existing asphalt structure  102 . 
     Numerous characteristics, advantages, and embodiments of the invention have been described in detail in the forgoing description with reference to the accompanying drawings. However, the above description and drawings are illustrative only. The invention is not limited to the illustrated embodiments, and all embodiments of the invention need not necessarily achieve all of the advantages or purposes, or possess all characteristics, identified herein. Various changes and modifications may be effected by one skilled in the art without departing from the scope or spirit of the invention. Although example materials and dimensions have been provided, the invention is not limited to such materials and dimensions have been provided, the invention is not limited such materials or dimensions unless specifically required by the language of a claim. The elements and uses of the above-described embodiments can be rearranged and combined in manners other than specifically described above, with any and all permutations within the scope of the inventions.

Summary:
A cap device to protect a restored asphalt core hole created from asphalt core test and methods to protect an asphalt core hole.