Emulsified asphalt mixture Marshall test piece mold

Abstract

The utility model discloses an emulsified asphalt mixture Marshall test piece mold which comprises an inner cylinder and an outer cylinder, the inner cylinder and the outer cylinder are both of a cylindrical structure with two open ends, and the inner cylinder is arranged in the outer cylinder; the inner cylinder is formed by splicing two arc-shaped structures, and the two arc-shaped structures are fixedly connected through grub screws; a plurality of drainage holes are distributed in the inner cylinder; the outer cylinder is sleeved on the inner cylinder and clings to the inner cylinder; the outer cylinder is also formed by splicing two arc-shaped structures, one end of each arc-shaped structure is provided with an outer cylinder T-shaped groove, and the other end of each arc-shaped structure is provided with an outer cylinder T-shaped protrusion capable of being inserted into the outer cylinder T-shaped groove. According to the utility model, the problem that water is difficult to flow out when the emulsified asphalt mixture Marshall test piece is demulsified is solved, the demulsification speed is accelerated, the test time and cost are saved, the molding and demolding of the test piece are integrated, the demolding process is simplified, and the test piece is prevented from being damaged when being demolded.

Description

Technical Field

[0001] The utility model belongs to the technical field of road engineering test equipment, and in particular relates to a Marshall test piece mould for an emulsified asphalt mixture. Background Art

[0002] The Marshall test is a crucial indoor test for studying the road performance of asphalt mixtures, and the use of a Marshall mold is unavoidable. Currently, the Marshall test for emulsified asphalt mixtures and the Marshall test for hot-mix asphalt mixtures use the same sealed cylinder as the Marshall test specimens. This hinders the outflow of water during demulsification during indoor curing, slowing the demulsification process. Furthermore, the molded specimens require demolding using a demolding machine, increasing the workload and the chance of damage during demolding, thus affecting subsequent test results. Utility Model Content

[0003] The purpose of the utility model is to solve the problems in the prior art that water is difficult to flow out of the emulsified asphalt mixture Marshall specimen when demulsifying, the demulsification speed is slow, and the specimen is easily damaged when demoulding, and the like, and to propose a Marshall specimen mold for an emulsified asphalt mixture.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A Marshall test piece mold for an emulsified asphalt mixture comprises an inner cylinder and an outer cylinder, both of which are cylindrical structures with openings at both ends, and the inner cylinder is placed in the outer cylinder;

[0006] The inner cylinder is made of two arc-shaped structures spliced together and fixed with headless screws;

[0007] There are several drainage holes distributed on the inner cylinder, and detachable sealing screws are provided in the drainage holes;

[0008] The outer cylinder is sleeved on the inner cylinder and fits tightly against the inner cylinder;

[0009] The outer cylinder is also spliced together by two arc-shaped structures, one end of the arc-shaped structure is a T-shaped groove of the outer cylinder, and the other end is a T-shaped protrusion of the outer cylinder that can be inserted into the T-shaped groove of the outer cylinder.

[0010] As a further preferred solution, one end of the inner tube is an insert end, and the other end is a socket end, and the insert end is inserted into the socket end and fixed.

[0011] As a further preferred solution, screw holes are provided at corresponding positions of the insert end and the socket end, and the screw holes of the insert end and the socket end are fixed by headless screws.

[0012] As a further preferred solution, 24 drainage holes are distributed on the inner cylinder, and the diameter of the drainage holes is 5 mm.

[0013] As a further preferred solution, the drainage hole is a threaded hole and the blocking screw is a headless screw.

[0014] Beneficial effects: The device of the utility model is used for the Marshall test of emulsified asphalt mixture, which is beneficial to the outflow of demulsified water in the emulsified asphalt mixture during indoor curing, and the formed test piece does not need to be demolded by a demolding machine, avoiding the situation where the test piece is damaged during the demolding process, effectively solving the inconvenience caused by conventionally using the hot mix asphalt mixture Marshall mold for the emulsified asphalt mixture Marshall test, saving test time and cost, and ensuring the scientific and efficient design of the subsequent mixture proportion and road performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of a Marshall test piece mold for an emulsified asphalt mixture of the utility model;

[0016] Figure 2 It is a schematic structural diagram of the cross section of the utility model;

[0017] Figure 3 This is a schematic structural diagram of the inner cylinder of the utility model;

[0018] Figure 4 This is a schematic structural diagram of the headless screw of the utility model;

[0019] Serial numbers in the figure: 1. Inner tube, 2. Through hole of inner tube, 3. Drain hole, 4. Outer tube, 5. T-shaped protrusion of outer tube, 6. Headless screw, 7. Top of screw, 8. Insert end, 9. T-shaped groove of outer tube. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] The utility model provides a Marshall specimen mold for an emulsified asphalt mixture, comprising an inner cylinder 1 and an outer cylinder 4. The inner and outer cylinders are designed to be fitted together to form a mold. Both the inner cylinder 1 and the outer cylinder 4 are cylindrical structures with openings at both ends, and the inner cylinder 1 is placed in the outer cylinder 4.

[0022] The inner cylinder 1 is composed of two approximately annular semi-cylindrical structures, the open ends of the two parts are butt-connected and fixed by headless screws 6 to form an annular cylindrical structure.

[0023] The inner tube 1 is designed with 24 drainage holes 3 with a diameter of 5 mm, which are conducive to the outflow of water when the emulsified asphalt is demulsified; when the emulsified asphalt mixture Marshall specimen is compacted, the drainage holes 3 are sealed with headless screws 6 to ensure a tight fit.

[0024] The outer cylinder 4 is composed of two identical parts, one end of which has a T-shaped protrusion and the other end has a T-shaped groove, which can be engaged and tightly connected.

[0025] The inner cylinder 1 is composed of two identical parts detachably connected by screws, while the outer cylinder 4 is composed of two identical parts detachably connected by slots. This allows for rapid demulsification of the Marshall specimen of emulsified asphalt mixture, saving testing time and costs. Furthermore, the molding and demolding of the specimen are integrated, simplifying the demolding process and preventing damage to the specimen during demolding.

[0026] The outer cylinder 4 is detachably connected to the inner cylinder 1, which is easy and quick to operate. The outer cylinder 4 fits tightly against the inner cylinder 1 to stabilize the inner cylinder 1 and share the force on the inner cylinder 1 during the Marshall compaction process.

[0027] Furthermore, after the Marshall specimen of the emulsified asphalt mixture has been cured in the mold for a period of time and has formed a certain strength, the screws on the wall of the inner cylinder 1 are removed to facilitate the smooth outflow of water when the emulsified asphalt is demulsified. Example 1

[0028] Reference Figure 1-4 The utility model provides a Marshall specimen mold that is easy to demould, comprising an outer cylinder 4 and an inner cylinder 1, wherein the outer cylinder 4 is sleeved on the inner cylinder 1 and is tightly connected.

[0029] The inner tube 1 has an annular semi-cylindrical structure, with a plug end 8 at one end and a socket end at the other end. The plug end 8 is inserted into the socket end and fixed. Screw holes 2 are provided at corresponding positions of the plug end 8 and the socket end. The screw holes 2 of the plug end 8 and the screw holes 2 of the socket end are installed and fixed by headless screws 6, so that the two parts can be tightly connected.

[0030] The outer cylinder 4 is composed of two identical parts, one end of which has an outer cylinder T-shaped protrusion 5 and the other end has an outer cylinder T-shaped groove 9. The two parts of the outer cylinder 4 are detachably engaged and tightly connected, and the operation is simple and quick.

[0031] The outer cylinder 4 fits snugly over the inner cylinder 1, stabilizing it and distributing the forces exerted on it during Marshall compaction. The two open ends of the inner cylinder 1 have holes of identical size and are removably connected by headless screws 6. Twenty-four centrally symmetrical drainage holes 3, each with a diameter of 5 mm, are defined within the inner cylinder 1. During Marshall compaction of the emulsified asphalt mixture, these holes are tightly sealed with headless screws 6. Example 2

[0032] The apparatus of Example 1 was used to conduct a Marshall test on an emulsified asphalt mixture in a laboratory. The process was as follows:

[0033] Step 1: Mold assembly: first snap the two parts of the inner tube 1 together, then screw the headless screw 6 into the through hole 2 to connect the two parts to form a ring; fill the drainage holes 3 of the inner tube 1 with the headless screw 6 and tighten them, with the screw tips 7 facing outward to ensure a tight seam; then mesh the two parts of the outer tube 4 tightly, put them on the outside of the inner tube 1, and tightly clamp the inner tube 1 to form a complete Marshall specimen mold, and fix the Marshall specimen mold on the Marshall test base;

[0034] Step 2: Marshall compaction: Pour the emulsified asphalt mixture into the complete mold, then fix it on the Marshall compactor and perform the Marshall compaction test according to the standard operation. After the compaction is completed, remove the device and stand the mold for curing.

[0035] Step 3: Curing with mold: After the formed Marshall specimen is cured on its side for a period of time and forms initial strength, the outer cylinder 4 is removed, and the headless screw 6 in the drainage hole 3 is unscrewed to keep the drainage hole 3 unblocked so that the water can flow out smoothly during the curing of the emulsified asphalt mixture;

[0036] Step 4: Demolding: After the curing is completed, unscrew the screw in the through hole 2 of the inner cylinder, and then pull apart the two inner semi-circular cylinders.

[0037] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A Marshall specimen mold for emulsified asphalt mixture, characterized by: It comprises an inner cylinder (1) and an outer cylinder (4), wherein both the inner cylinder (1) and the outer cylinder (4) are cylindrical structures with both ends open, and the inner cylinder (1) is placed in the outer cylinder (4); The inner cylinder (1) is formed by splicing two arc-shaped structures and is fixedly connected by headless screws (6); A plurality of drainage holes (3) are distributed on the inner cylinder (1), and detachable sealing screws are provided in the drainage holes (3); The outer cylinder (4) is sleeved on the inner cylinder (1) and is in close contact with the inner cylinder (1); The outer cylinder (4) is also formed by splicing two arc-shaped structures, one end of the arc-shaped structure is an outer cylinder T-shaped groove (9), and the other end is an outer cylinder T-shaped protrusion (5) that can be inserted into the outer cylinder T-shaped groove (9).

2. The Marshall specimen mold for emulsified asphalt mixture according to claim 1, characterized in that: One end of the inner tube (1) is an insert end (8), and the other end is a socket end, and the insert end (8) is inserted into the socket end and fixed.

3. The Marshall specimen mold for emulsified asphalt mixture according to claim 2, characterized in that: Screw holes (2) are provided at corresponding positions of the insert end (8) and the socket end, and the screw hole (2) of the insert end (8) and the screw hole (2) of the socket end are fixed by a headless screw (6).

4. The Marshall specimen mold for emulsified asphalt mixture according to claim 2, characterized in that: 24 drainage holes (3) are distributed on the inner cylinder (1), and the diameter of the drainage holes (3) is 5 mm.

5. The Marshall specimen mold for emulsified asphalt mixture according to claim 2, characterized in that: The drainage hole (3) is a threaded hole, and the blocking screw is a headless screw (6).

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