CN104198684B - Concrete transmission performance test system and method - Google Patents
Concrete transmission performance test system and method Download PDFInfo
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- CN104198684B CN104198684B CN201410439247.3A CN201410439247A CN104198684B CN 104198684 B CN104198684 B CN 104198684B CN 201410439247 A CN201410439247 A CN 201410439247A CN 104198684 B CN104198684 B CN 104198684B
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Abstract
The invention discloses a kind of concrete transmission performance test system and method, relate to research and the field tests of endurance performance of concrete, main purpose is the transmission performance testing concrete in the case of concrete test block is loaded constant compressive stress.The main technical schemes of the present invention is: a kind of concrete transmission performance test system, including: by four pull bars, and lower platen, limit valve, center platen, spring, top board, packing ring and the constant compressive stress charger of nut composition that sequence from low to uper part is set on pull bar；And the solution circulation-supplied device being made up of a solution tank, a constant flow pump, a water tank and three anticorrosion flexible pipes.Wherein, the distance between lower platen and center platen is more than the height of concrete test block；Limit valve, packing ring and nut arrange one on every pull bar；Arranging an elastomeric element below center platen, one end of these parts contacts with the lower surface of medium pressure plate, and the other end contacts with concrete test block.
Description
Technical field
The present invention relates to research and the field tests of endurance performance of concrete, be specifically related to a kind of concrete transporting
System and method can be tested.
Background technology
Concrete performance depends greatly on the quantity of pore, size and distribution, aggregate in cement slurry
Performance and slurry and the performance at aggregate interface.Xoncrete structure under arms during unavoidably will be by load
With the impact of the extrinsic factor such as environment, these factors can cause the transmission performance of concrete to produce change, thus shadow
Ring the durability of xoncrete structure.
In the research that concrete performance is affected by the load in the past carried out, prefabricating load of main employing, so
Again being transmitted property of concrete is tested after rear unloading, but this kind of method cannot simulation concrete in actual environment
Continue the situation of bearing load, thus the data reliability of test exists bigger error.Also having one is to coagulation
Soil applies continuing load, the simultaneously test of being transmitted property, but current the method carry out studying less, mainly
Reason is the restriction of charger of being put to the test.Because should for applying the charger existence loading of constant compressive stress
Force level and the shortcoming such as stability is limited, complex operation step, error are bigger, eventually affect result of the test
Accuracy, and the applying of these chargers is all bending load, and the sample of stand under load bears in neutral line both sides
Compressive stress and the distinct load action of tension both, it is impossible to individually bear constant in simulation actual environment
The situation of compressive stress, also cannot meet readily accessible, be easy to the requirements such as maintenance, accurate measurement that change the outfit.And mesh
Before also do not have a kind of being suitable for applying to test in the case of continuing load the solution supply dress of concrete transporting
Put.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of concrete transmission performance test system and method for testing, main
Syllabus is the transmission performance testing concrete in the case of concrete test block is loaded constant compressive stress.
For reaching above-mentioned purpose, present invention generally provides following technical scheme:
On the one hand, embodiments providing a kind of concrete transmission performance test system, this system includes:
Place constant compressive stress charger and the solution circulation-supplied device of concrete test block.
Solution circulation-supplied device is soft including a solution tank, a constant flow pump, a water tank and three anticorrosions
Pipe, solution loads sealing in solution tank, inserts two anticorrosion flexible pipes in solution tank, and wherein one connects constant flow pump,
The constant flow pump other end is hose connection to water tank by an anticorrosion, and the other end of water tank connects the another of insertion solution tank
A piece anticorrosion flexible pipe, forms a loop making solution circulate.
The opening of water tank is in sealing contact with the concrete test block placed in constant compressive stress charger, makes described
The loop of solution circulation is closed circuit.
Foregoing concrete transmission performance test system, described constant compressive stress charger includes:
Four pull bars, and sequence from low to uper part be set on pull bar lower platen, limit valve, center platen, bullet
Spring, top board, packing ring and nut.
Lower platen is used for placing concrete test block, and the distance between described lower platen and center platen is more than described coagulation
The height of soil test block.
Limit valve, packing ring and nut arrange one on every pull bar, described limit valve for fixing do not add mixed
Center platen, spring and the top board moved down due to gravity before the test block of solidifying soil.
The lower surface of one contact component, one end of this contact component and medium pressure plate is set below center platen
Contact, the other end contacts with concrete test block, and this contact component is for answering the pressure of center platen in pressure process
Power Transmit evenly, to concrete test block, makes concrete test block uniform force.
Foregoing concrete transmission performance test system, in described concrete constant compressive stress charger
Contact component is sphere roller bearing.
The top of sphere roller bearing is rectangle for semicircle, bottom.
Center platen center position has one to be less than described semicircular groove, and the height of this groove is that center platen is thick
The half of degree, and less than described semicircular radius.
The semicircle major part of sphere roller bearing embeds in center platen and can be the most freely rotatable, rectangle lower surface
Contact with concrete test block.
Foregoing concrete transmission performance test system, in described concrete constant compressive stress charger
Contact component is elastomeric element；
Elastomeric element includes base and is arranged on the elastic mechanism of this base upper surface；The lower surface of described base with
Described concrete test block is fully contacted；The top of described elastic mechanism contacts with the lower surface of medium pressure plate.
Foregoing concrete transmission performance test system, in described concrete constant compressive stress charger
Being provided with strain gauge on pull bar, described strain gauge is arranged between medium pressure plate and lower platen.
Foregoing concrete transmission performance test system, described spring is disk spring, on its every pull bar
Quantity be 40.
Foregoing concrete transmission performance test system, described top board is divided into upper and lower two parts:
The upper surface of top half is higher than the upper surface of described four pull bars when described nut is screwed to minimum；
The latter half has 4 circular holes matched with described four pull bars.
Foregoing concrete transmission performance test system, described constant compressive stress charger includes:
Four pull bars, and sequence from low to uper part be set on pull bar lower platen, center platen, spring, upper pressure
Plate, packing ring and nut.
Lower platen is used for placing concrete test block, and the distance between described lower platen and center platen is more than described coagulation
The height of soil test block.
Packing ring and nut arrange one on every pull bar.
On the other hand, embodiments provide a kind of concrete transmission performance test method, be applied to above-mentioned
Concrete transmission performance test system, the method includes:
4 limit valves in constant compressive stress charger are upwards fixed on pull bar as far as possible；
Concrete test block is put between lower platen and center platen, after placing, unclamps limit valve, adjust concrete
Test block position allows the contact component lower surface of center platen lower end be fully contacted concrete test block；
Being placed on pressure testing machine by described constant compressive stress charger, described top board upper surface fully connects
Touch pressure testing machine top board, described lower platen is fully contacted pressure testing machine lower platen；
Start pressure testing machine persistent pressure, until the dependent variable of display in the strain gauge that device pull bar side is pasted
Value reaches pre-provisioning request, stops loading, controls pressure testing machine load stable；
Uniformly tightening 4 nuts lentamente, during fastening nut, spring is gradually started accumulation of energy by compression,
The load that pressure testing machine shows is gradually reduced, when pressure testing machine load is just 0, by constant compressive stress
Connection solution circulation-supplied device taken off from pressure testing machine by charger；
Assemble described solution circulation-supplied device, select a smooth side of concrete test block, by described molten
Tank seal in liquid circulation-supplied device is fixed on this side；
Thereunder place a weighing instrument after loading solution sealing in solution tank and record its initial weight, test
During every fixing a period of time weigh record once, start constant flow pump, make solution in solution circulation-supplied
Device circulates, makes solution can continuously contact this concrete side；
According to the transporting testing concrete by solution transfer rate and length of penetration after reaching predetermined test period
Energy.
Foregoing concrete transmission performance test method, described according to by solution transfer rate and length of penetration
The transmission performance of test concrete includes:
Calculate the minimizing speed of solution quality according to experiment of weighing result, obtain solution transfer rate.
Concrete test block is unloaded after one section of horizontal splitting of installation water tank, permeate with development process test solution
The degree of depth.
The transmission performance of concrete is characterized by solution transfer rate and length of penetration.
The constant compressive stress of concrete in the concrete transmission performance test system that the embodiment of the present invention provides loads
Device, fixes top board, the elastic deformation accumulation of energy of recycling disk spring by nut, can try concrete
Block loads the constant compressive stress of big load, simultaneously by the contact component arranged below center platen, makes this device
The constant compressive stress loaded loads more stable, after have employed limit valve, makes the placement of concrete test block more
It is convenient, owing to whole device is to be formed by four pull bar concatenations so that the overall structure of this device is simple, it is simple to
Dismounting and maintenance.And the concrete transmission performance test system that the embodiment of the present invention provides, by constant pressure
Stress loading device and the cooperation of solution circulation-supplied device, can simulate the perseverance of varying level in Practical Project
The real working condition of the concrete components such as level pressure stress and solution erosion, in conjunction with mixing that the embodiment of the present invention provides
Solidifying soil transmission performance test method, the data result making this test system be tested out more has engineering reference price
Value.
Accompanying drawing explanation
The concrete transmission performance test system structure schematic diagram that Fig. 1 provides for the embodiment of the present invention；
The another kind of concrete transmission performance test system structure schematic diagram that Fig. 2 provides for the embodiment of the present invention；
The structural representation of the concrete constant compressive stress charger that Fig. 3 provides for the embodiment of the present invention；
The side view of the constant compressive stress charger sphere roller bearing that Fig. 4 provides for the embodiment of the present invention and vertical view
Figure；
The top view of the constant compressive stress charger center platen that Fig. 5 provides for the embodiment of the present invention and side view；
The another kind of concrete constant compressive stress charger structural representation that Fig. 6 provides for the embodiment of the present invention；
The side view of the constant compressive stress charger pull bar that Fig. 7 provides for the embodiment of the present invention；
The top view of the constant compressive stress charger lower platen that Fig. 8 provides for the embodiment of the present invention and side view；
The side view of the constant compressive stress charger top board that Fig. 9 provides for the embodiment of the present invention and top view；
The side view of the constant compressive stress charger limit valve that Figure 10 provides for the embodiment of the present invention and top view.
Detailed description of the invention
With embodiment, the present invention is described in detail below in conjunction with the accompanying drawings, but drawings and Examples are the most only to use
In explanation technical scheme, the concrete structure of the most each parts, connected mode etc. are all to have become
Change, every equivalents carried out on the basis of technical solution of the present invention or improvement, the most should not get rid of at this
Outside the protection domain of invention.
Embodiments provide a kind of concrete transmission performance test system, as it is shown in figure 1, include: put
Put constant compressive stress charger and the solution circulation-supplied device of concrete test block.
Concrete constant compressive stress charger, as it is shown on figure 3, this device includes: four pull bars 8, and
Lower platen 9 that sequence from low to uper part is set on pull bar, limit valve 7, center platen 5, spring 4, top board 3,
Packing ring 2 and nut 1.
Wherein, lower platen 9 is used for placing concrete test block, the distance between described lower platen 9 and middle pressure 5 plate
Height more than described concrete test block；
Limit valve 7, packing ring 2 and nut 1 arrange one on every pull bar, and limit valve 7 is for fixing not
Center platen 5, spring 4 and the top board 3 moved down due to gravity before adding concrete test block；
One contact component 6, one end of this contact component and medium pressure plate 5 are set below center platen 5
Lower surface contacts, and the other end contacts with concrete test block, and this contact component 6 is used for middle pressure in pressure process
The compressive stress of plate passes to concrete test block, makes concrete test block uniform force.
Solution circulation-supplied device, including a solution tank 11, water tank 12 and three of 10, constant flow pump
Root anticorrosion flexible pipe 13, solution loads sealing in solution tank 10, inserts two anticorrosion flexible pipes 13 in solution tank 10,
Wherein one connects constant flow pump 11, and constant flow pump 11 other end is hose connection to water tank 12, water by an anticorrosion
The other end of case 12 connects another root anticorrosion flexible pipe inserting solution tank 10, is formed one make that solution circulates time
Road；Wherein the opening of water tank 12 is in sealing contact with the concrete test block placed in constant compressive stress charger,
The loop making solution circulate is closed circuit.
Constant compressive stress charger in this concrete transmission performance test system can be above-mentioned concrete
Constant compressive stress charger, it is also possible to be the constant compressive stress charger of other forms, the concrete present invention
This is not limited by embodiment.
When this constant compressive stress charger is above-mentioned constant compressive stress charger, the embodiment of the present invention carries
The water tank 12 of the solution circulation-supplied device in the concrete transmission performance test system of confession is with to be placed on this constant
Concrete test block on compressive stress charger is tightly connected.
The embodiment of the present invention also provides for a kind of concrete transmission performance test system, as in figure 2 it is shown, this concrete
Constant compressive stress charger is:
Four pull bars 26, and sequence from low to uper part be set on pull bar lower platen 27, center platen 25, bullet
Spring 24, top board 23, packing ring 22 and nut 21；Wherein, lower platen 27 is used for placing concrete test block,
Distance between lower platen 27 and center platen 25 is more than the height of concrete test block, and packing ring 22 and nut
21 arrange one on every pull bar.
Solution circulation-supplied device in this concrete transmission performance test system and the aforesaid embodiment of the present invention
Solution circulation-supplied device in the concrete transmission performance test system provided is identical, is also by water tank 12
It is tightly connected with the concrete test block being placed on this constant compressive stress charger.
As it is shown in figure 1, the contact of concrete constant compressive stress charger in concrete transmission performance test system
Parts can be sphere roller bearing, it is also possible to for elastomeric element, this is not limited by the concrete embodiment of the present invention,
As long as it can play one end and concrete test block upper surface, the other end contacts with center platen, at center platen
When moving downward, can be by complete for compressive stress Transmit evenly to concrete test block.
When described contact component is sphere roller bearing, as shown in Figure 4, the top of this sphere roller bearing be semicircle,
Bottom is rectangle, has one to be less than described semicircular groove at center platen 5 lower surface center position, as
Shown in Fig. 5, the height of this groove is the half of center platen thickness, and less than described semicircle radius, makes ball
The semicircle major part of face roller bearing 6 embeds in center platen 5 and can be the most freely rotatable, sphere roller bearing 6 bottom
Rectangular lower surface and concrete test block upper surface.
When described contact component is elastomeric element, as shown in Figure 6, the contact site arranged below center platen 5
Part can be an elastomeric element, and this elastomeric element includes base and is arranged on the elastic mechanism of this base upper surface,
Wherein the lower surface of base is fully contacted with concrete test block, the top of elastic mechanism and the lower surface of center platen 5
Contact.
It is provided with strain gauge 20, such as Fig. 3 on four pull bars of above-mentioned concrete constant compressive stress charger
Shown in, strain gauge 20 is pasted between center platen 5 and lower platen 9.
Further, spring used by above-mentioned concrete constant compressive stress charger is disk spring, this dish
Spring has another name called Belleville washer, and they are different from general spring, being mainly characterized by of this disk spring: springform
Amount is high, stroke is short, be applied in combination conveniently, maintenance changes the outfit easily and security performance is high, especially can be less
Great load is born in space.The degeneration of disk spring unit volume can be relatively big, especially with stack combinations
Time, due to skin friction resistance effect, the effect absorbing impact and dissipation energy is obvious.This device is according to applying
After load range computation, every pull bar can use the dish-shaped bullet of 40 40*20.4*1.5*1.15mm
Spring stack combinations uses, but this is not limited by the concrete embodiment of the present invention, can make according to concrete
The quantity of disk spring is set by demand, such as 30, or 35 etc..
In above-mentioned concrete constant compressive stress charger, four pull bars 8 are respectively from 9 four angles of lower platen
Circular hole pass, one section, pull bar 8 bottom diameter be more than its part above, as it is shown in fig. 7, and this
Duan Gaodu is less than the half of lower platen 9 thickness, and the circular hole on 9 four angles of lower platen matches with pull bar 8 lower end
Set, the aperture big, upper part, aperture for lower part is little, as shown in Figure 8, the two use after wearing connection with
Reach the effect interfixed；Being equipped with circular hole on center platen 5 and 3 four angles of top board, aperture is more than pull bar
The diameter of 8 upper parts, by limit valve 7, center platen 5, disk spring 4 and top board 3 successively from pull bar 8
Upper end pass, be sleeved between four pull bars 8 and can slide up and down, the upper end of pull bar 8 packing ring 2 and spiral shell
Female 1 fixes, and the upper edge of pull bar 8 is higher than the upper edge of nut 1.
As shown in figures 7 and 9, in Fig. 7, pull bar 8 upper end has one section of screw thread to match with nut 1, has screw thread
This segment length be less than the total height of top board 3 in Fig. 9, to ensure the upper surface of this device top board 3
Can be permanently connected in pressure process with the lower surface of pressure testing machine top board, thus by means of pressure test
Machine carries out pressurized operation.
As shown in Figure 10 and Fig. 7, in Figure 10 on the pull bar 8 in the Circularhole diameter at limit valve 7 center and Fig. 7
The diameter of end is consistent, and both match, and limit valve 7 can be fixed on pull bar 8 by the screw of side.
Concrete constant compressive stress charger in above-mentioned concrete transmission performance test system, nut used
1 is stop nut.
Based on above-mentioned concrete transmission performance test system, the embodiment of the present invention provides a kind of concrete transmission performance
Method of testing, the method specifically includes following steps:
1. 4 limit valves in constant compressive stress charger are upwards fixed on pull bar as far as possible so that press down
Distance between plate and center platen is more than the height of concrete test block.
2. concrete test block is put between lower platen and center platen, after placing, unclamps limit valve, adjust coagulation
Soil test block position allows the contact component lower surface of center platen lower end be fully contacted concrete test block.
3. being placed on pressure testing machine by constant compressive stress charger, the top board upper surface of this device is abundant
Contact pressure testing machine top board, the lower platen of this device is fully contacted pressure testing machine lower platen.
4. start pressure testing machine persistent pressure, until the strain of display in the strain gauge that device pull bar side is pasted
Numerical value reaches pre-provisioning request, stops loading, and controls pressure testing machine and makes load stable.
5. uniformly tightening 4 nuts lentamente, during fastening nut, disk spring is gradually left by compression
Beginning accumulation of energy, the load that pressure testing machine shows is gradually reduced, when pressure testing machine load is just 0, dish
Spring is the most just compressed to precalculated position, the most just can be by constant compressive stress charger from pressure testing machine
On take off connection solution circulation-supplied device.
6. assemble described solution circulation-supplied device, select a smooth side of concrete test block, by solution
Tank seal in circulation-supplied device is fixed on this side.
7., after loading solution sealing in solution tank, thereunder place a weighing instrument and record its initial weight,
Process of the test was weighed every fixing a period of time and records once, start constant flow pump simultaneously, make solution at solution
Circulating in circulation-supplied device, such solution can continuously contact this concrete side.
8. according to the transmission testing concrete by solution transfer rate and length of penetration after reaching predetermined test period
Performance.
Wherein, according to when testing the transmission performance of concrete by solution transfer rate and length of penetration, can adopt
With but be not limited to following method, the method includes:
Calculate the minimizing speed of solution quality according to experiment of weighing result, obtain solution transfer rate；
Concrete test block is unloaded after one section of horizontal splitting of installation water tank, permeate with development process test solution
The degree of depth；
The transmission performance of concrete is characterized by solution transfer rate and length of penetration.
The concrete constant compressive stress charger that the embodiment of the present invention provides, fixes top board 3 by nut 1,
The elastic deformation accumulation of energy of recycling disk spring 4, loads the constant compressive stress of big load to concrete test block, with
Time by the contact component 6 arranged below center platen 5, make the constant compressive stress loading that this device loads more
Stable, after have employed limit valve 7, the placement making concrete test block is more convenient, due to whole device be by
Four pull bar 8 concatenations form so that the overall structure of this device is simple, it is simple to dismantles and maintains.And this
The concrete transmission performance test system that inventive embodiments provides, is followed by constant compressive stress charger and solution
Ring feeding mechanism matches, and constant compressive stress and the solution that can simulate varying level in Practical Project corrode
Deng the real working condition of concrete component, the concrete transmission performance test side provided in conjunction with the embodiment of the present invention
Method, the data result making this test system be tested out more has project reference value.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope that the invention discloses, can readily occur in change or
Replace, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be with described power
The protection domain that profit requires is as the criterion.
Claims (6)
1. a concrete transmission performance test system, it is characterised in that including: place concrete test block
Constant compressive stress charger and solution circulation-supplied device；
Constant compressive stress charger, including:
Four pull bars, and sequence from low to uper part be set on pull bar lower platen, limit valve, center platen, bullet
Spring, top board, packing ring and nut；
Described lower platen is used for placing concrete test block, and the distance between described lower platen and center platen is more than described
The height of concrete test block；
Described limit valve, packing ring and nut arrange one on every pull bar, and described limit valve is for fixing not
Center platen, spring and the top board moved down due to gravity before adding concrete test block；
One elastomeric element, one end of described elastomeric element and medium pressure plate are set below medium pressure plate
Lower surface contacts, and the other end contacts with concrete test block, and described elastomeric element is used for middle pressure in pressure process
The compressive stress Transmit evenly of plate, to concrete test block, makes concrete test block uniform force；Wherein, described elasticity
Parts include base and are arranged on the elastic mechanism of this base upper surface；The lower surface of described base and described coagulation
Soil test block is fully contacted；The top of described elastic mechanism contacts with the lower surface of medium pressure plate；
Solution circulation-supplied device is soft including a solution tank, a constant flow pump, a water tank and three anticorrosions
Pipe, solution loads sealing in solution tank, inserts two anticorrosion flexible pipes in solution tank, and wherein one connects constant flow pump,
The constant flow pump other end is hose connection to water tank by an anticorrosion, and the other end of water tank connects the another of insertion solution tank
A piece anticorrosion flexible pipe, forms a loop making solution circulate；
The opening of described water tank is in sealing contact with the concrete test block placed in constant compressive stress charger, makes
The loop of described solution circulation is closed circuit.
Concrete transmission performance test system the most according to claim 1, it is characterised in that described mixed
Be provided with strain gauge on pull bar in solidifying native constant compressive stress charger, described strain gauge be arranged on described in
Between pressing plate and lower platen.
Concrete transmission performance test system the most according to claim 2, it is characterised in that described bullet
Spring is disk spring, and the quantity on its every pull bar is 40.
Concrete transmission performance test system the most according to claim 3, it is characterised in that on described
Pressing plate is divided into upper and lower two parts:
The upper surface of top half is higher than the upper surface of described four pull bars when described nut is screwed to minimum；
The latter half has 4 circular holes matched with described four pull bars.
5. a concrete transmission performance test method, is applied to according to any one of the claims 1-4
Concrete transmission performance test system, it is characterised in that including:
4 limit valves in constant compressive stress charger are upwards fixed on pull bar as far as possible；
Concrete test block is put between lower platen and center platen, after placing, unclamps limit valve, adjust concrete
Test block position allows the elastomeric element lower surface of center platen lower end be fully contacted concrete test block；
Being placed on pressure testing machine by described constant compressive stress charger, described top board upper surface fully connects
Touch pressure testing machine top board, described lower platen is fully contacted pressure testing machine lower platen；
Start pressure testing machine persistent pressure, until the dependent variable of display in the strain gauge that device pull bar side is pasted
Value reaches pre-provisioning request, stops loading, controls pressure testing machine load stable；
Uniformly tightening 4 nuts lentamente, during fastening nut, spring is gradually started accumulation of energy by compression,
The load that pressure testing machine shows is gradually reduced, when pressure testing machine load is just 0, by constant compressive stress
Connection solution circulation-supplied device taken off from pressure testing machine by charger；
Assemble described solution circulation-supplied device, select a smooth side of concrete test block, by described molten
Tank seal in liquid circulation-supplied device is fixed on this side；
Thereunder place a weighing instrument after loading solution sealing in solution tank and record its initial weight, test
During every fixing a period of time weigh record once, start constant flow pump, make solution in solution circulation-supplied
Device circulates, makes solution can continuously contact this concrete side；
According to the transporting testing concrete by solution transfer rate and length of penetration after reaching predetermined test period
Energy.
Method the most according to claim 5, it is characterised in that described according to by solution transfer rate and
The transmission performance of length of penetration test concrete includes:
Calculate the minimizing speed of solution quality according to experiment of weighing result, obtain solution transfer rate；
Concrete test block is unloaded after one section of horizontal splitting of installation water tank, permeate with development process test solution
The degree of depth；
The transmission performance of concrete is characterized by solution transfer rate and length of penetration.
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| CN107436271A (en) * | 2017-08-31 | 2017-12-05 | 中南大学 | The research device of wick effect solution transmitting procedure in concrete |
| CN109883926A (en) * | 2019-03-28 | 2019-06-14 | 广西大学 | Biaxial pressure acts on lower concrete chloride ion diffusion test macro and its method |
| CN109883927B (en) * | 2019-03-28 | 2022-06-14 | 广西大学 | System and method for testing concrete chloride ion diffusion performance under action of bending load |
| CN110579588A (en) * | 2019-10-23 | 2019-12-17 | 青海民族大学 | device and method for testing durability of concrete |
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