CN208672632U - It a kind of concrete expansion and shrinks and outer limits test device - Google Patents

Abstract

The utility model disclose a kind of concrete expansion and shrink it is outer limit test device, including outer limiter, wooden template, steel pedestal, magnetic force dial framework and two amesdials, the outer limiter includes two steel shoes, the elongated muscle of limitation and limitation muscle；The gauge outfit of described two amesdials two end in contact with the outer limiter respectively；The both ends of the elongated muscle of limitation are fixedly connected with described two steel shoe levels respectively, and one end of the limitation muscle is fixedly connected with a steel shoe level, and the other end of the limitation muscle is vacantly located inside the outer limiter.The utility model structure is simple, it is easy to use, can tested automatically with mould and under removing mould curing condition concrete under inside and outside restrictive condition due to self-heat generation, heat dissipation and material self-characteristic when expansion and shrinkage, can also effectively simulation concrete from pour, template conserves the overall process that conserves to demoulding, test data stability is good, practical.

Description

It a kind of concrete expansion and shrinks and outer limits test device

Technical field

The utility model relates to concrete NDT equipment, specifically a kind of concrete expansion and the outer limitation test dress of contraction It sets.

Background technique

Concrete is a kind of widely applied civil engineering material, and the quality of concrete quality is in addition to its every mechanical property In addition, it is also necessary to pay close attention to its expansion and shrinkage, the performance quality equally influence concrete service life and Endurance quality." GB23439-2009 cement expansive material " is mainly passed through for the test of concrete expansion and shrinkage at present The limited expansion rate of middle recommendation is tested, and mainly passing through a diameter is 8mm, length 300mm, section 100* The limitation expansion rod of 100mm measures, and this method is mainly used to the limitation expansion of concrete after test incorporation extender product Rate, but engineering in practice, concreting at the most size of component it is larger, and its cannot effectively simulation concrete from pouring Build, template maintenance, demoulding maintenance etc. in overall processes concrete due to internal aquation temperature change, humidity variation and material itself Dilation performance under the situation of change of characteristic, therefore, the result tested out have biggish limitation.

Chinese patent literature CN202974227U discloses a kind of multi-channel full automatic concrete shrinkage dilatometer, including master Measurement data can be all automatically credited in host by machine, displacement sensor, Temperature Humidity Sensor and measuring device, be not necessarily to people Work record；Chinese patent literature CN206583907U discloses a kind of concrete shrinkage dilatometer, has and type certain to length The effect that number different a variety of concrete samples measure；Chinese patent literature CN206740037U discloses a kind of concrete Convergent-divergent instrument, thus it is possible to vary the angle of discharging frame and pedestal, to meet different test condition requirements.However, these devices are big More disclose test concrete expansion and shrinkage under interior restrictive condition, cannot be effectively in experiment indoor simulation large scale Concrete is due to the expansion and shrinkage under the conditions of internal aquation temperature change, humidity variation and changes in material properties.

Therefore, need a kind of concrete expansion and shrink it is outer limit test device, can effectively simulation concrete from pour, mould Plate conserves the overall process conserved to demoulding, the automatic expansion and shrinkage for testing concrete under outer restrictive condition.

Summary of the invention

The purpose of this utility model is in view of the problems of the existing technology, to provide a kind of concrete expansion and shrink outer limit Test device processed, can effectively be simulated in laboratory large-size concrete from pour, template conserves the overall process that conserves to demoulding, Expansion and shrinkage of the automatic test concrete under outer restrictive condition.

In order to achieve the above purposes, the technical solution adopted by the utility model is:

It a kind of concrete expansion and shrinks and outer limits test device, including outer limiter, wooden template, steel pedestal, magnetic Power dial framework and two amesdials, the outer limiter include two steel shoes, the elongated muscle of limitation and limitation muscle；The wooden template Including end template and two side templates, described two side templates are vertically installed on the end template, the end template with it is described The bottom end of steel shoe is in close contact, and described two side templates are in close contact with the two side ends of the steel shoe respectively；Described thousand points Table level is fixed on the magnetic force dial framework, the gauge outfit of described two amesdials two end in contact with the outer limiter respectively, The magnetic force dial framework is fixed on the steel pedestal vertically by magnetic force, and the steel pedestal is placed in the outer of the steel shoe Side；The both ends of the elongated muscle of limitation are fixedly connected with described two steel shoe levels respectively, one end and one of the limitation muscle A steel shoe level is fixedly connected, and the other end of the limitation muscle is vacantly located inside the outer limiter.

When using the utility model, it will first limit elongated muscle and limitation muscle be connected and fixed with steel shoe, at outer limiter bottom Wooden template and fixation are loaded onto portion and two sides respectively, and before casting concrete, one layer should be brushed on the inside of wooden template and steel shoe Fresh concrete is packed into test device by machine oil or other lubricating oil in order to later period demoulding, is vibrated, is polished and supports with mould Shield, while the magnetic power meter that steel pedestal is placed at the position both ends steel shoe about 30~50mm, and amesdial will be housed Frame is absorbed and fixed at steel pedestal top, is peaked at the gauge outfit of two amesdials outside described respectively by the adjutage of magnetic force dial framework The both ends of limiter keep meter pointer in a half range of table range, shrink and expand for testing, work as concrete initial set Afterwards, two side templates are removed, guarantees that concrete is separated with side template, realize that the demoulding of concrete conserves, according to testing needs, The reading of time recording two sides amesdial changes, by conversion can real-time monitoring concrete expansion and shrinkage value.

Further, the steel shoe is the square steel of long 300~500mm, wide 300~500mm, 12~20mm of thickness Plate is respectively equipped with the screw hole that diameter is 8~16mm in the horizontal direction of described two steel shoes.Different size of steel shoe can To adapt to the concrete sample of different model.

Further, the diameter of the elongated muscle of the limitation and limitation muscle is 8~16mm, described to limit elongated muscle and limitation The length of muscle is respectively 1100~1200mm and 300~400mm, and the both ends of the elongated muscle of the limitation and limitation muscle are equipped with 20~ The thread segment of 40mm long.Different size of steel shoe is adapted to the concrete sample of different length.

Further, the elongated muscle of the limitation and limitation muscle are connect by screw with the steel shoe.

Further, the elongated muscle of limitation is five, is located at the quadrangle and center of the steel shoe；The limitation Muscle is eight, and every four are one group, and each group of limitation muscle is connect with a steel shoe, and one group of four limitation muscle is located at described The connecting line midpoint of steel shoe quadrangle and center.Limiting elongated muscle and being uniformly distributed for muscle of limitation makes uniform force, can be improved The Stability and veracity of measurement.

Further, the amesdial is the mechanical amesdial or electronics thousand of measurement accuracy 0.001mm, 0~15mm of range Divide table.

Further, the steel pedestal is the steel of 30~40mm of thickness, 10~15mm of length, 10~15mm of width Plate.

Compared with prior art, the utility model has the beneficial effects that

1, the utility model structure type is simple, and assembling is easy to use, and reusable, measuring stability is good, can be in band Mould and going under mould curing condition tests concrete under inside and outside restrictive condition due to self-heat generation, heat dissipation and material itself spy automatically Expansion and shrinkage when property.

2, the utility model can effectively simulation concrete from pour, the template expansion that conserve to demoulding of maintenance and the full mistake of contraction Journey.

3, the utility model by both ends amesdial can continuous long term monitoring concrete expansion and shrinkage, data are steady It is qualitative good.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the structural schematic diagram of the outer limiter of the utility model；

Fig. 3 is the structural schematic diagram of the utility model steel shoe；

In figure: 1, steel shoe；2, screw；3, amesdial；4, magnetic force dial framework；5, steel pedestal；6, elongated muscle is limited；7, it limits Muscle processed.

Specific embodiment

Below in conjunction with the attached drawing in the utility model, the technical solution of the utility model is clearly and completely retouched It states, it is clear that the described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.Based on this Embodiment in utility model, those of ordinary skill in the art under the conditions of not making creative work it is obtained it is all its Its embodiment, fall within the protection scope of the utility model.

Embodiment 1

As shown in Figures 1 to 3, a kind of concrete expansion and the outer limitation test device of contraction, including outer limiter, wooden mould Plate, steel pedestal 5, magnetic force dial framework 4 and two amesdials 3, the outer limiter include two steel shoes 1, elongated 6 and of muscle of limitation Limit muscle 7；The wooden template includes end template and two side templates, and described two side templates are vertically installed at the end template On, the bottom end of the end template and the steel shoe 1 is in close contact, described two side templates respectively with the steel shoe 1 two Side is in close contact；3 level of amesdial is fixed on the magnetic force dial framework 4, the gauge outfit of described two amesdials 3 respectively with Two end in contact of the outer limiter, the magnetic force dial framework 4 are fixed on the steel pedestal 5 vertically by magnetic force, the steel Matter pedestal 5 is placed in the outside of the steel shoe 1；The both ends of the elongated muscle 6 of limitation are horizontal with described two steel shoes 1 respectively It is fixedly connected, one end of the limitation muscle 7 is fixedly connected with 1 level of steel shoe, the hanging position of the other end of the limitation muscle 7 Inside the outer limiter.

The steel shoe 1 is the square steel plate of long 300mm, width 300mm, thickness 12mm, the water of described two steel shoes 1 Square upwards be respectively equipped with diameter be 8mm nine screw holes.

The diameter of the elongated muscle 6 of limitation and limitation muscle 7 is 16mm, the length of the limitation elongated muscle 6 and limitation muscle 7 Respectively 1100mm and 300mm, the elongated muscle 6 of limitation are equipped with the thread segment of 30mm long with the both ends of limitation muscle 7.Further , the elongated muscle 6 of the limitation and limitation muscle 7 pass through screw 2 and connect with the steel shoe 1.

The elongated muscle 6 of limitation is five, is located at the quadrangle and center of the steel shoe 1；The limitation muscle 7 is eight A, every four are one group, and each group of limitation muscle 7 is connect with a steel shoe 1, and one group of four limitation muscle 7 is located at the steel The connecting line midpoint of 1 four jiaos of baffle and center.Limiting elongated muscle 6 and being uniformly distributed for muscle 7 of limitation makes uniform force, can be improved The Stability and veracity of measurement.

The amesdial 3 is the electronic dial gauge of measurement accuracy 0.001mm, 0~15mm of range.

The steel pedestal 5 is the steel plate of thickness 30mm, length 10mm, width 10mm.

When using the utility model, it will first limit elongated muscle 6 and limitation muscle 7 penetrate in the screw hole on steel shoe 1, pass through spiral shell Fixation 2 is tightened in both ends by silk, loads onto wooden template and fixation respectively in outer limiter bottom and two sides, before casting concrete, answers One layer of machine oil or other lubricating oil are brushed on the inside of wooden template and steel shoe 1, and in order to later period demoulding, fresh concrete is filled Enter in test device, vibrate, polish and curing in the mold, at the same by steel pedestal 5 be placed in apart from both ends steel shoe 1 about 30~ At the position 50mm, and the magnetic force dial framework 4 equipped with amesdial 3 is absorbed and fixed at 5 top of steel pedestal, passes through magnetic force dial framework 4 The gauge outfit of two amesdials 3 is peaked at the both ends of the outer limiter by adjutage respectively, keeps meter pointer the one of table range In half range, shrinks and expand for testing, after concrete initial set, two side templates are removed, guarantee concrete and side form Plate separates, and realizes the demoulding maintenance of concrete, according to test needs, the reading variation of time recording two sides amesdial 3, by changing Calculate can real-time monitoring concrete expansion and shrinkage value.

Embodiment 2

A kind of concrete expansion and shrink it is outer limit test device, the difference from embodiment 1 is that, the steel shoe 1 is The square steel plate of long 500mm, width 500mm, thickness 18mm are respectively equipped with diameter in the horizontal direction of described two steel shoes 1 For nine screw holes of 8mm.Different size of steel shoe 1 is adapted to the concrete sample of different model.

The utility model structure type is simple, and assembling is easy to use, and reusable, measuring stability is good, can be in band mould And it goes under mould curing condition to test concrete automatically under inside and outside restrictive condition due to self-heat generation, heat dissipation and material self-characteristic When expansion and shrinkage, can effectively simulation concrete from pour, template conserves the expansion and receipts that conserve to demoulding Contracting overall process, by both ends amesdial 3 can continuous long term monitoring concrete expansion and shrinkage, data stability is good.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (7)

1. a kind of concrete expansion and the outer limitation test device of contraction, which is characterized in that including outer limiter, wooden template, steel Matter pedestal (5), magnetic force dial framework (4) and two amesdials (3), the outer limiter include two steel shoes (1), the elongated muscle of limitation (6) and muscle (7) are limited；The wooden template includes end template and two side templates, and described two side templates are vertically installed at institute State on end template, the bottom end of the end template and the steel shoe (1) is in close contact, described two side templates respectively with the steel The two side ends of baffle (1) are in close contact；Amesdial (3) level is fixed on the magnetic force dial framework (4), and described two thousand points The gauge outfit of table (3) respectively be fixed on described vertically by magnetic force by two end in contact with the outer limiter, the magnetic force dial framework (4) On steel pedestal (5), the steel pedestal (5) is placed in the outside of the steel shoe (1)；The two of the elongated muscle (6) of limitation End is fixedly connected with described two steel shoes (1) level respectively, and one end of limitation muscle (7) and a steel shoe (1) are horizontal It is fixedly connected, the other end of limitation muscle (7) is vacantly located inside the outer limiter.

2. a kind of concrete expansion according to claim 1 and the outer limitation test device of contraction, which is characterized in that the steel Baffle (1) is the square steel plate of long 300~500mm, wide 300~500mm, 12~20mm of thickness, described two steel shoes (1) Horizontal direction on be respectively equipped with diameter be 8~16mm screw hole.

3. a kind of concrete expansion according to claim 1 and the outer limitation test device of contraction, which is characterized in that the limit Making elongated muscle (6) and limiting the diameter of muscle (7) is 8~16mm, the length point of the limitation elongated muscle (6) and limitation muscle (7) Not Wei 1100~1200mm and 300~400mm, the both ends of the elongated muscle (6) of the limitation and limitation muscle (7) are equipped with 20~40mm Long thread segment.

4. a kind of concrete expansion according to claim 2 or 3 and the outer limitation test device of contraction, which is characterized in that institute It states the elongated muscle (6) of limitation and limitation muscle (7) is connect by screw (2) with the steel shoe (1).

5. a kind of concrete expansion according to claim 1 and the outer limitation test device of contraction, which is characterized in that the limit Making elongated muscle (6) is five, is located at the quadrangle and center of the steel shoe (1)；The limitation muscle (7) be eight, every four A is one group, and each group of limitation muscle (7) connect with a steel shoe (1), and one group of four limitation muscle (7) is located at the steel gear The connecting line midpoint of plate (1) quadrangle and center.

6. a kind of concrete expansion according to claim 1 and the outer limitation test device of contraction, which is characterized in that described thousand Dividing table (3) is the mechanical amesdial or electronic dial gauge of measurement accuracy 0.001mm, 0~15mm of range.

7. a kind of concrete expansion according to claim 1 and the outer limitation test device of contraction, which is characterized in that the steel Matter pedestal (5) is the steel plate of 30~40mm of thickness, 10~15mm of length, 10~15mm of width.