Apparatus and method for analyzing aggregate

• US 8,807,345 B2
• Filed: 02/07/2012
• Issued: 08/19/2014
• Est. Priority Date: 02/07/2011
• Status: Active Grant

• Current Assignee: Presby Plastics, Inc. (Infiltrator Water Technologies, LLC)
• Original Assignee: Presby Patent Trust
• Inventors: Presby, David W.
• Primary Examiner(s): GOKHALE, PRASAD V
• Application Number:
  US13/367,968
• Publication Number:
  US 20130032512A1
• Time in Patent Office: 924 Days
• Field of Search: 209/274, 209289-291, 209/300, 209/370, 209/372, 209/13, 209/17, 209/268, 210/335, 210/337, 210/338, 210/499, 210/497.01, 210/497.3
• US Class Current: 209/291
• CPC Class Codes: B01D 33/06 with rotary cylindrical filtering surfaces, e.g. hollow drums B01D33/044 takes precedence ; rotating drums for paper-making D21B
• CPC Class Codes: B01D 33/11 arranged for outward flow filtration
• CPC Class Codes: B03B 5/56 Drum classifiers
• CPC Class Codes: B07B 1/12 Apparatus having only parallel elements
• CPC Class Codes: B07B 1/14 Roller screens
• CPC Class Codes: B07B 1/18 Drum screens
• CPC Class Codes: B07B 1/4609 constructional details of screening surfaces or meshes
• CPC Class Codes: B07B 2230/01 Wet separation
• CPC Class Codes: G01N 15/0272 with screening; with classification by filtering B01D takes precedence
• CPC Class Codes: G01N 2015/0092 Monitoring flocculation or agglomeration
• CPC Class Codes: G01N 2015/0096 Investigating consistence of powders, dustability, dustiness
• CPC Class Codes: G01N 33/38 Concrete; ceramics; glass; bricks
• CPC Class Codes: G01N 33/383 Concrete, cement

Abstract

A device, method, and system for analyzing aggregate are described. An exemplary device may include a housing with one or more grading screens. Aggregate and liquid may be received by a port within the housing. The liquid and any suspended fines, after passing through the one or more grading screens and aggregate, may be received into an observation container for observing the clarity of the liquid.

Claims

1. An apparatus comprising:

a housing;

a plurality of grading screens nested in concentric fashion within the housing, wherein an innermost grading screen defines a receiving compartment configured to receive aggregate, a subsequent grading screen has a finer mesh size and a larger surface area than the innermost grading screen, and a space between adjacent grading screens defines a sorting compartment;

a continuous fluid pathway passing from the receiving compartment through the plurality of grading screens;

a first end plate configured to engage a first end of the plurality of grading screens;

a second end plate configured to engage a second end of the plurality of grading screens;

a connector extending between and joining the first end plate and the second end plate, wherein the connector resides within the receiving compartment of the innermost grading screen; and

a lid configured to be brought into a liquid-tight sealing relationship with the housing;

wherein at least one of the first end plate or second end plate is further configured to be brought into a liquid-tight sealing relationship with the plurality of grading screens.

2. The apparatus of claim 1, wherein the lid has disposed therein a plurality of apertures having selective open and closed positions, each of the apertures configured to align with a corresponding sorting compartment and to permit contents of a given sorting compartment to exit the apparatus.

3. The apparatus of claim 1 further comprising at least one outlet having selective open and closed positions and configured to permit liquid and fines of the aggregate to exit the apparatus when in the open position.

4. The apparatus of claim 3, wherein at least one such outlet is disposed downstream of the grading screen having the finest mesh size.

5. The apparatus of claim 1, wherein fluid communication between adjacent sorting compartments is restricted to occurring through the grading screen there between.

6. The apparatus of claim 1, wherein the apparatus is configured to be tumbled, shaken, spun, or agitated while maintaining the continuous fluid pathway.

7. The apparatus of claim 6, wherein the apparatus further comprises a mechanical agitator configured to perform at least a portion of the tumbling, shaking, spinning, or agitating.

8. The apparatus of claim 1, wherein at least one of the plurality of grading screens has a mesh size that conforms to ASTM C-33 standards.

9. The apparatus of claim 1, wherein at least one of the plurality of grading screens has a shape chosen from the group consisting of cylindrical, conical, polygonal, cuboid, pyramidal, prismatic, and polyhedral.

10. The apparatus of claim 1 further comprising one or more spacers configured to maintain positioning of a first grading screen relative to a second grading screen or relative to the housing.

11. The apparatus of claim 1, wherein the aggregate comprises at least one of powder, dust, clay, sand, gravel, crushed stone, crushed concrete, coal, slag, crushed glass, loam, silt, soil, or septic fill.

12. A method of analyzing aggregate, the method comprising:

passing at least a portion of a liquid and an aggregate through a first grading screen of a given mesh size and a given surface area;

passing at least a portion of the liquid and the aggregate through a second grading screen, wherein the second grading screen has a finer mesh size and a larger surface area than the first grading screen, and the first grading screen is configured to nest concentrically within the second grading screen, and wherein the first and second grading screens are sealed within a housing;

collecting at least a portion of the liquid and fines of the aggregate after passage thereof through the second grading screen; and

performing at least one of;

observing the clarity of the collected portion of the liquid;

measuring the amount of settled particulate matter in the collected portion of the liquid;

or

measuring the turbidity of the collected portion of the liquid;

wherein passing at least a portion of the liquid and aggregate through a grading screen comprises tumbling, shaking, spinning, or agitating the housing.

13. The method of claim 12, wherein tumbling, shaking, spinning, or agitating of the housing is performed manually.

14. The method of claim 12, wherein tumbling, shaking, spinning, or agitating of the housing is performed mechanically.

15. The method of claim 12, wherein collecting at least a portion of the liquid involves dispensing liquid and fines from an outlet operatively coupled to the grading screens.

16. The method of claim 12 further comprising measuring the amount of liquid before and after passage thereof through the aggregate and through one or more of the first and second grading screens.

17. The method of claim 12, wherein the liquid is introduced to the aggregate and is flowed through one or more of the first and second grading screens multiple times and in different directions of flow.

18. The method of claim 12, wherein observing the clarity of the liquid occurs a predetermined period of time after collecting at least a portion of the liquid and fines after passage thereof through the second grading screen.

19. The method of claim 12, wherein the aggregate comprises at least one of powder, dust, clay, sand, gravel, crushed stone, crushed concrete, coal, slag, crushed glass, loam, silt, soil, or septic fill, and wherein observing the clarity of the liquid delineates fines of the aggregate.

20. The method of claim 12, wherein at least a portion of the liquid and the aggregate pass through the first and second grading screens in a single step.

21. A system comprising:

a grading container comprising;

a housing;

a plurality of grading screens nested in concentric fashion within the housing, wherein an innermost grading screen defines a receiving compartment configured to receive aggregate, a subsequent grading screen has a finer mesh size and a larger surface area than the innermost grading screen, and a space between adjacent grading screens of the plurality defines a sorting compartment;

a continuous fluid pathway passing from the receiving compartment and through the plurality of grading screens, wherein fluid communication between adjacent sorting compartments is restricted to occurring through the grading screen there between;

a first end plate configured to engage a first end of the plurality of grading screens;

a second end plate configured to engage a second end of the plurality of grading screens; and

a connector extending between and joining the first end plate and the second end plate, wherein the connector resides within the receiving compartment of the innermost grading screen; and

an observation container configured to receive at least a portion of the liquid and fines of the aggregate which exit the grading container, wherein the observation container includes indicia for classifying fines in the aggregate and is configured to permit at least one of observing the clarity of the liquid, measuring the volume of settled particulate matter, or measuring the turbidity of the liquid.