CN105547874A - Concrete impact resistance detection apparatus and method - Google Patents
Concrete impact resistance detection apparatus and method Download PDFInfo
- Publication number
- CN105547874A CN105547874A CN201510962741.2A CN201510962741A CN105547874A CN 105547874 A CN105547874 A CN 105547874A CN 201510962741 A CN201510962741 A CN 201510962741A CN 105547874 A CN105547874 A CN 105547874A
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- Prior art keywords
- concrete
- pendulum
- elastic modulus
- base
- groove
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/34—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0039—Hammer or pendulum
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0688—Time or frequency
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention discloses a concrete impact resistance detection apparatus and method, the concrete impact resistance detection apparatus includes a base, a frame, a pendulum hammer, a cantilever, a shaft, a brake switch, a pendulum rod and the pendulum hammer; the bottom of the frame is fixed onto the base, the middle part of the cantilever is fixed to the top of the frame, the bottom surface of the cantilever is axially provided with a groove, both sides of the groove are provided with through holes, rotating bearings are arranged in the through holes, two ends of the shaft internally sleeves the rotating bearings, a one-way gear sleeves the shaft, the side face of the groove is provided with a mounting slotted hole, one end of the brake switch is located outside the mounting slotted hole, the other end of the brake switch passes through the mounting slotted hole to extend into the one-way gear and cooperate with the one-way gear, one end of the pendulum rod is connected to the shaft, the pendulum hammer is fixed to the other end of the pendulum rod, and the side face of the frame is provided with a fixing device for fixing a concrete specimen. The concrete impact resistance detection apparatus is capable of measuring the impact toughness index of the concrete specimen.
Description
Technical field
The invention belongs to testing concrete performance field, relate to a kind of device and method detecting elastic modulus of concrete performance.
Background technology
Along with the fast development of China's economic level, it is more and more obvious that the high speed of vehicular load, high frequency and high load capacity impact the dynamic damage effect brought traffic infrastructure, has higher requirement to the shock resistance of pavement material.The series of advantages such as intensity is high although cement concrete has, good stability, load-bearing capacity are strong, but its fragility is obvious, shock resistance is poor, under vehicle dynamic load effect, very easily produce cracking destruction, therefore develop the cement concrete material with excellent impact resistance energy, for the permanance improving road infrastructure, there is vital role.
But still lack at present both at home and abroad a kind of method of testing of standard and equipment to evaluate the shock resistance of concrete material, more is that the weighted-drop adopting ACI ACI-544 to recommend is evaluated.Although the method principle is simple, needs repeatedly will drop hammer and lift a certain height, the position fallen of dropping hammer is difficult to fixing, easily causes secondary pulse, and needs in test process to be repeatedly interrupted test, observe the crackle development condition of surface of test piece.Although can bump be realized after having part test instrument to improve, accelerate test process, but still need the crack propagation situation repeatedly observing test specimen, the dependence that its test result judges the experience of testing crew and naked eyes is very high, test error is large, be difficult to the impact flexibility index accurately passing judgment on material, be unfavorable for that the optimization of material and performance are improved.Therefore, develop a kind of method feasible, test shock resistance valuator device simple and easy to carry there is important Social and economic benef@, concrete performance field test and evaluation in work progress can be accelerated greatly.
Summary of the invention
The object of the invention is to the shortcoming overcoming above-mentioned prior art, provide a kind of device and method detecting elastic modulus of concrete performance, this device and method can measure the impact flexibility index of concrete sample.
For achieving the above object, the device of detection elastic modulus of concrete performance of the present invention comprises base, frame, pendulum, cantilever, axle, brake switch, fork and pendulum;
The bottom of frame is fixed on base, the top of frame is fixed at the middle part of cantilever, the bottom surface of cantilever offers groove vertically, the two sides of groove are provided with and offer through hole, swivel bearing is provided with in through hole, the two ends of axle are socketed in swivel bearing, axle is socketed with ratchet, the side opening of groove is provided with installation slotted eye, one end of brake switch is positioned at installs outside slotted eye, the other end of brake switch to extend in ratchet through described installation slotted eye and matches with described ratchet, one end of fork is connected with axle, pendulum is fixed on the other end of fork, the side of frame is provided with the stationary installation for fixing concrete test specimen, during test, pendulum moves from top to bottom and impinges upon on concrete sample.
Described stationary installation comprises two anvil blocks and offers draw-in groove on described anvil block, and the end of concrete sample is embedded in described draw-in groove, and anvil block is L-type structure.
The side of described fork is provided with buckle, and cantilever is provided with the start button matched with described buckle.
The side opening of frame is provided with the accommodating groove for placing fork and pendulum.
The bottom of base is provided with some anti-skidding feets.
Also comprise leveling knob, the lower end of leveling knob is connected with the top of anti-skidding feet, and the upper end of leveling knob is embedded in described base, and leveling knob is connected by screw thread with between base.
Described base is provided with air level.
Described base is provided with handle.
The method of detection elastic modulus of concrete performance of the present invention comprises the following steps:
1) adjust base, make base horizontal positioned, then concrete sample is fixed in stationary installation;
2) slip brake switch, makes brake switch depart from ratchet, then is promoted in groove by pendulum, and then slip brake switch, makes ratchet one-directional rotation;
3) decontrol pendulum, pendulum freely falls, and impinges upon on concrete sample;
4) step 2 is repeated) and 3), till concrete sample rupture failure, the number of times that record clashes into, then obtains the impact flexibility index of concrete sample according to the number of times of described shock.
The present invention has following beneficial effect:
The present invention detects the device and method of elastic modulus of concrete performance when concrete operations, by pendulum, concrete sample is clashed into continuously, till concrete sample rupture failure, the impact flexibility index of concrete sample is obtained again according to the number of times clashed into, structure is simple, easy to operate, there is wide popularization space.In addition, pendulum freely falls and impinges upon on concrete sample, because fork is connected in the groove of cantilever bottom surface by axle and swivel bearing, axle is socketed with ratchet simultaneously, by brake switch to ratchet rotate backward carry out spacing, thus after avoiding pendulum to strike concrete sample, secondary pulse occurs, thus improve the precision measured.In addition, concrete sample is fixed by stationary installation, avoids concrete sample to offset, and reduces the error in measuring process.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention;
Fig. 2 is the structural representation of ratchet 17 in the present invention;
Fig. 3 is the structural representation of anvil block 10 in the present invention.
Wherein, 1 be frame, 2 be cantilever, 3 be brake switch, 4 be swivel bearing, 5 be start button, 6 be fork, 7 be buckle, 8 be pendulum, 9 be accommodating groove, 10 be anvil block, 11 be draw-in groove, 12 be air level, 13 be anti-skidding feet, 14 be leveling knob, 15 be base, 16 be handle, 17 for ratchet.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
With reference to figure 1, Fig. 2 and Fig. 3, the device of detection elastic modulus of concrete performance of the present invention comprises base 15, frame 1, pendulum 8, cantilever 2, axle, brake switch 3, fork 6 and pendulum 8, the bottom of frame 1 is fixed on base 15, the top of frame 1 is fixed at the middle part of cantilever 2, the bottom surface of cantilever 2 offers groove vertically, the two sides of groove are provided with and offer through hole, swivel bearing 4 is provided with in through hole, the two ends of axle are socketed in swivel bearing 4, axle is socketed with ratchet 17, the side opening of groove is provided with installation slotted eye, one end of brake switch 3 is positioned at installs outside slotted eye, the other end of brake switch 3 to extend in ratchet 17 through described installation slotted eye and matches with described ratchet 17, one end of fork 6 is connected with axle, pendulum 8 is fixed on the other end of fork 6, the side of frame 1 is provided with the stationary installation for fixing concrete test specimen, during test, pendulum 8 moves from top to bottom and impinges upon on concrete sample.
It should be noted that, described stationary installation comprises two anvil blocks 10 and offers draw-in groove 11 on described anvil block 10, and the end of concrete sample is embedded in described draw-in groove 11, and anvil block 10 is L-type structure, avoid concrete sample displacement in test process, improve the precision measured; The side of described fork 6 is provided with buckle 7, and cantilever 2 is provided with the start button 5 matched with described buckle 7.The side opening of frame 1 is provided with the accommodating groove 9 for placing fork 6 and pendulum 8.The bottom of base 15 is provided with some anti-skidding feets 13.The present invention also comprises leveling knob 14, the lower end of leveling knob 14 is connected with the top of anti-skidding feet 13, the upper end of leveling knob 14 is embedded in described base 15, and is connected by screw thread between leveling knob 14 with base 15, makes base 15 horizontal mode by the anti-skidding feet 13 of transmission; Described base 15 is provided with air level 12, checks base whether horizontal positioned by described air level 12; Base 15 is provided with handle 16, is carried the device of detection elastic modulus of concrete performance of the present invention by handle 16.
The method of detection elastic modulus of concrete performance of the present invention comprises the following steps:
1) adjust base 15, make base 15 horizontal positioned, then concrete sample is fixed in stationary installation;
2) slip brake switch 3, makes brake switch 3 depart from ratchet 17, then is promoted in groove by pendulum 8, and then slip brake switch 3, makes ratchet 17 one-directional rotation;
3) decontrol pendulum 8, pendulum 8 freely falls, and impinges upon on concrete sample;
4) step 2 is repeated) and 3), till concrete sample rupture failure, the number of times that record clashes into, then obtains the impact flexibility index of concrete sample according to the number of times of described shock.
Claims (9)
1. one kind is detected the device of elastic modulus of concrete performance, it is characterized in that, comprise base (15), frame (1), pendulum (8), cantilever (2), axle, brake switch (3), fork (6) and pendulum (8);
The bottom of frame (1) is fixed on base (15), the top of frame (1) is fixed at the middle part of cantilever (2), the bottom surface of cantilever (2) offers groove vertically, the two sides of groove are provided with and offer through hole, swivel bearing (4) is provided with in through hole, the two ends of axle are socketed in swivel bearing (4), axle is socketed with ratchet (17), the side opening of groove is provided with installation slotted eye, one end of brake switch (3) is positioned at installs outside slotted eye, the other end of brake switch (3) to extend in ratchet (17) through described installation slotted eye and matches with described ratchet (17), one end of fork (6) is connected with axle, pendulum (8) is fixed on the other end of fork (6), the side of frame (1) is provided with the stationary installation for fixing concrete test specimen, during test, pendulum (8) moves from top to bottom and impinges upon on concrete sample.
2. the device of detection elastic modulus of concrete performance according to claim 1, it is characterized in that, described stationary installation comprises two anvil blocks (10) and offers the upper draw-in groove (11) of described anvil block (10), the end of concrete sample is embedded in described draw-in groove (11), and anvil block (10) is L-type structure.
3. the device of detection elastic modulus of concrete performance according to claim 1, it is characterized in that, the side of described fork (6) is provided with buckle (7), and cantilever (2) is provided with the start button (5) matched with described buckle (7).
4. the device of detection elastic modulus of concrete performance according to claim 1, is characterized in that, the side opening of frame (1) is provided with the accommodating groove (9) for placing fork (6) and pendulum (8).
5. the device of detection elastic modulus of concrete performance according to claim 1, is characterized in that, the bottom of base (15) is provided with some anti-skidding feets (13).
6. the device of detection elastic modulus of concrete performance according to claim 5, it is characterized in that, also comprise leveling knob (14), the lower end of leveling knob (14) is connected with the top of anti-skidding feet (13), the upper end of leveling knob (14) is embedded in described base (15), and is connected by screw thread between leveling knob (14) with base (15).
7. the device of detection elastic modulus of concrete performance according to claim 1, is characterized in that, described base (15) is provided with air level (12).
8. the device of detection elastic modulus of concrete performance according to claim 1, is characterized in that, described base (15) is provided with handle (16).
9. detect a method for elastic modulus of concrete performance, it is characterized in that, based on the device of detection elastic modulus of concrete performance according to claim 1, comprise the following steps:
1) adjust base (15), make base (15) horizontal positioned, then concrete sample is fixed in stationary installation;
2) slip brake switch (3), brake switch (3) is made to depart from ratchet (17), again pendulum (8) is promoted in groove, and then slip brake switch (3), make ratchet (17) one-directional rotation;
3) decontrol pendulum (8), pendulum (8) freely falls, and impinges upon on concrete sample;
4) step 2 is repeated) and 3), till concrete sample rupture failure, the number of times that record clashes into, then obtains the impact flexibility index of concrete sample according to the number of times of described shock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510962741.2A CN105547874A (en) | 2015-12-19 | 2015-12-19 | Concrete impact resistance detection apparatus and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510962741.2A CN105547874A (en) | 2015-12-19 | 2015-12-19 | Concrete impact resistance detection apparatus and method |
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| CN105547874A true CN105547874A (en) | 2016-05-04 |
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| CN201510962741.2A Pending CN105547874A (en) | 2015-12-19 | 2015-12-19 | Concrete impact resistance detection apparatus and method |
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Cited By (4)
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| CN106596300A (en) * | 2017-02-09 | 2017-04-26 | 中建土木（北京）工程检测鉴定中心 | Device for detection of material strength by use of pendulum hammering method and method for detection of material strength |
| CN110207920A (en) * | 2019-05-24 | 2019-09-06 | 西南交通大学 | Coating percussion mechanism and the secondary rebounding mechanism of strike plate thereon |
| CN113008702A (en) * | 2021-04-09 | 2021-06-22 | 湖州纬达建材科技有限公司 | Double-station strength detection device for aerated concrete plate |
| CN114136819A (en) * | 2021-11-27 | 2022-03-04 | 安徽瑞麦鞋业有限公司 | Shoes weight check out test set |
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| CN113008702A (en) * | 2021-04-09 | 2021-06-22 | 湖州纬达建材科技有限公司 | Double-station strength detection device for aerated concrete plate |
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| CN114136819A (en) * | 2021-11-27 | 2022-03-04 | 安徽瑞麦鞋业有限公司 | Shoes weight check out test set |
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Application publication date: 20160504 |