CN201740713U - Device for measuring uniformity and cohesion of concrete mixture - Google Patents

Abstract

The utility model specifically relates to a device for measuring the uniformity and cohesion of concrete mixture, belonging to the field of concrete test. The device for measuring the uniformity and cohesion of concrete mixture is characterized by comprising a bracket, a pulley, a hopper, a chute and a baffle plate, wherein the bracket comprises two parallel slide rails and support legs for supporting the slide rails; the pulley is arranged on the two slide rails; the hopper is fixed on the pulley and the bottom of the hopper is provided with a discharging port; the chute is positioned below the two parallel sliding rails and is formed by a plurality of boxes arranged sequentially in the direction parallel to the sliding rails; one end part of the bracket is fixed with the baffle plate which is positioned right below the sliding rails, and the baffle plate closes off the discharging port of the hopper when the pulley is positioned at an initial position. The device has the characteristics of convenient and rapid use and can simultaneously measure the uniformity and cohesion of concrete mixture.

Description

Measure concrete mix homogeneity and the glutinous device that gathers property

Technical field

The utility model belongs to the concrete test field, is specifically related to a kind of concrete mix homogeneity and glutinous device that gathers property measured.

Background technology

Concrete is the most widely used building materialss of modern times, also is the most large current artificial material.Concrete by each composition material by a certain percentage mix become, as yet not setting and harden the time be called concrete mix, the sclerosis back claims maturing.The main character of concrete mix is flowability, homogeneity, glutinous poly-property etc.

Flowability is meant that concrete mix under the effect that dead weight or construction machinery vibrate, can produce the performance that flows and evenly fill up template densely, and mobile quality directly influences the Concrete Construction complexity.Homogeneity is meant the degree of uniformity that each component distributes between the different unit volume concrete, and the quality of homogeneity directly influences the quality of concrete situation.Glutinous poly-property is meant that concrete mix has certain cohesive strength between its composition material in work progress, unlikely generation laminated segregation, and the quality of glutinous poly-property affects concrete flowability and homogeneity again.

Along with the speed of application of building operation is more and more faster, preparation of construction is more and more advanced, it is pumping construction that a large amount of Concrete Construction all requires, but pump concrete is when having advantages such as continuous placing, efficient height, saving labour, to concrete flowability, homogeneity and all relevant higher requirement of glutinous poly-property.Yet at present a lot of workmens more pay close attention to concrete flowability, wish to use mobile very big concrete, and have often ignored concrete homogeneity and glutinous poly-property.

Concrete with large fluidity helps concrete and realizes pumping construction, can reduce the pump pressure of pump machine, also be beneficial to after concrete pump is delivered to the constructing operation face, reduce labor intensity of operating personnel, but when concrete flowability is excessive, also can have a negative impact to concrete quality: concrete flowability is excessive, then glutinous poly-property also can be very poor, be prone to sand-cement slurry and waterborne floating and the laminated segregation phenomenon of stone sinking, and then influence concrete homogeneity, simultaneously also can have a strong impact on concrete pumpability, the phenomenon of stifled pump easily takes place, can cause serious consequence to construction quality, produce " honeycomb " after causing concrete hardening, defectives such as " pitted skins " influences concrete intensity and permanance.In addition, for high-strength or super high strength concrete, the quality that does not only also reflect the mixture pump-conveying property from the flowing property of mixture, because the Binder Materials of high-strength or super high strength concrete is generally higher, and water-cement ratio is generally lower, the consumption of water reducer is higher, this just makes that the flowability of high-strength or super high strength concrete is often very big, but its cohesiveness is also very big, though concrete mix can rely on own wt and flow, flow velocity is very slow, when pumping construction, concrete is very big to the frictional resistance of pump line, and pumping is difficulty very.

Therefore, the quality of estimating Concrete Construction performance and pump-conveying property should be taken all factors into consideration flowability, the homogeneity of concrete mix and stick poly-property.For these three performance detection, all corresponding method should be arranged.

According to " Standard for test methods of properties of ordinary concrete mixture standard " GB/T 50080-2002 regulation, the mobile size method of surveying the slump and divergence of mixture, this method is simple and convenient, and it is higher that engineering circle receives degree.

The homogeneity of mixture does not have the detection method of standard at present, Chinese patent 200720086777.X has proposed a kind of light aggregate concrete rheological property and homogeneous pick-up unit, this device is divided into several layers by the delamination degree bucket with concrete mix, light-weight aggregate in cleaning out every layer concrete, the weight of the light-weight aggregate in drawing every layer after the oven dry, estimate the homogeneity of every layer concrete, have certain feasibility, but test operation is comparatively complicated.

The glutinous poly-vigorous denseness of the useful dimension of property of mixture is evaluated, and can only evaluate the dry concrete mixture but tie up vigorous denseness, is not suitable for chutable concrete; At present, the also useful time of falling the slump is evaluated glutinous poly-property, method is after concrete mix is filled in the slump cone inversion, by testing crew whole slump cone is mentioned, all evaluate glutinous poly-property from the time that slump cone flows out with concrete mix, the time of falling the slump is long more to show that then the glutinous poly-property of concrete mix is big more, but this method personal error is bigger.

Therefore, when the workability of concrete mix and pump-conveying property are estimated, on the basis of the slump that records concrete mix and divergence, be necessary to propose to be fit to measure the device of the homogeneity and the glutinous poly-property of concrete mix.

The utility model content

The purpose of this utility model provide a kind of easy to use, measure the device of concrete mix homogeneity and glutinous poly-property efficiently.

To achieve these goals, the technical solution of the utility model is: measure concrete mix homogeneity and the glutinous device that gathers property, it is characterized in that it comprises support, coaster, hopper, hopper and baffle plate; Support comprises two parallel slide rails and in order to support the supporting leg of slide rail; Coaster is located on two slide rails; Hopper is fixed on the coaster, and the bottom of hopper offers discharge port; Hopper is positioned at the below of two parallel slide rails, and hopper is arranged in order along the direction that is parallel to slide rail by the identical magazine of a plurality of shapes and forms; One end of support is fixed with baffle plate, baffle plate be positioned at slide rail under, baffle plate and slide rail be arranged in parallel, when coaster is positioned at reference position, the discharge port of baffle plate sealing hopper.

Being shaped as of described hopper is inverted terrace with edge shape or is inverted taper type.

Described coaster is the electrodynamic type coaster.

Compared with prior art, the utility model beneficial effect is: have easy to use, characteristics efficiently, can measure the homogeneity and the glutinous poly-property of concrete mix simultaneously.

Description of drawings

Fig. 1 is the schematic perspective view of the utility model device;

Fig. 2 is the schematic perspective view of support;

Fig. 3 is the schematic perspective view of coaster;

Fig. 4 is the schematic perspective view of hopper;

Fig. 5 is the schematic perspective view of hopper;

Fig. 6 be coaster when reference position, front elevation of the present utility model;

Fig. 7 be coaster when the working position, front elevation of the present utility model.

Description of symbols among the figure: 1-support, 2-coaster, 3-hopper, 4-hopper, 11-supporting leg, 12-slide rail, 13-baffle plate, 21-motor, 41-magazine.

Embodiment

In order to understand the utility model better, the utility model is further described below in conjunction with embodiment and accompanying drawing.

See also Fig. 1-7, measure concrete mix homogeneity and the glutinous device that gathers property, it comprises support 1, coaster 2, hopper 3, hopper 4, baffle plate 13; Support 1 comprises two parallel slide rails 12 and in order to support the supporting leg 11 of slide rail 12, fixedly connected with supporting leg 11 respectively in the bottom surface, both ends of slide rail 12; Coaster 2 is located on two slide rails 12, and can slide along slide rail 12; Hopper 3 is fixed on the coaster 12, and the bottom of hopper 3 offers discharge port, is mainly used to carry concrete mix; Terrace with edge shape is inverted in being shaped as of hopper 3.The shape that is appreciated that hopper 3 also can be the inversion taper type, to guarantee that concrete mix evenly falls from discharge port.Hopper 4 is positioned at the below of two parallel slide rails 12, and hopper 4 is arranged in order along the direction that is parallel to slide rail 12 by the identical magazine 41 of a plurality of shapes and forms (as 4-100 magazine); One end of support 1 is fixed with baffle plate 13, baffle plate 13 be positioned at slide rail 12 under, baffle plate 13 be arranged in parallel with slide rail 12, when coaster 2 is positioned at reference position (when hopper 3 is positioned at an end of slide rail 12), the discharge port of baffle plate 13 sealing hoppers 3 flows out from hopper 3 to stop concrete mix.

Also be provided with motor 21 (coaster is the electrodynamic type coaster) on the coaster 2, the output shaft of motor 21 is linked to each other by the axle of the road wheel on gear train and the coaster 2, is used to control coaster 2 uniform motion on slide rail 12.

Measure concrete mix homogeneity and glutinous method of gathering property, it comprises the steps:

1) prepare to measure concrete mix homogeneity and the glutinous device (as mentioned above) that gathers property,

2) coaster 2 that will measure concrete mix homogeneity and the device of glutinous poly-property is in reference position and (coaster 2 is stopped at an end of slide rail 12, because baffle plate 13 sealing discharge ports, therefore this moment, concrete mix can't flow out from hopper 3,), concrete mix is filled in the hopper, this coaster is at the uniform velocity slided (motor 21 drives coaster 2 and at the uniform velocity slides along slide rail 12) along this track, and concrete mix falls in the hopper from this hopper; Statistics falls to having the quantity n of the magazine 41 of concrete mix, to characterize the glutinous poly-property of concrete mix, the n value is big more, illustrate that concrete mix is big more from the time that the discharge port of hopper flows out, be that big more [n value is followed the speed of coaster for the glutinous poly-property of concrete mix, the size of magazine, and the capacity of hopper all is related, but for same device (when doing same batch of concrete mix laboratory sample), the speed of coaster then, the size of magazine, and the capacity of hopper is certain, in the present embodiment, when the n value less than 8 the time, the glutinous poly-property of concrete mix is less, when the n value is between 8～10, the glutinous poly-property of concrete mix is moderate, when n value greater than 10 the time, the glutinous property of gathering of concrete mix is bigger];

3) will fall to having the magazine of concrete mix to claim its weight one by one, calculate the homogeneity of concrete mix by following coefficient of dispersion formula:

$\mathrm{CV}=\frac{\sqrt{\frac{1}{n-3}\underset{i=2}{\overset{n-1}{\mathrm{\Σ}}}{(W_i-\frac{1}{n-2}\underset{i=2}{\overset{n-1}{\mathrm{\Σ}}}{W}_i)}^2}}{\frac{1}{n-2}\underset{i=2}{\overset{n-1}{\mathrm{\Σ}}}(W_i-W_0)}\×100\%$

Wherein: CV---the homogeneity of concrete mix;

W _i---i weight that falls to having the magazine of concrete mix, i 〉=2;

W ₀---do not fall to having the weight of the magazine of concrete mix;

N---fall to having the quantity of the magazine of concrete mix, n 〉=4.

CV is big more, illustrates that the homogeneity of concrete mix is poor more (in the present embodiment, CV is poor more greater than 10% o'clock homogeneity, and CV is good more less than 10% o'clock homogeneity).

Further specify the utility model below in conjunction with embodiment.

Table 1 is proportioning and the mobile data that are used for measuring homogeneity and stick the concrete mix of the embodiment 1-8 that gathers property.Wherein, embodiment the 1, the 2nd, and strength grade is the normal concrete of C30; Embodiment the 3, the 4th, and strength grade is the super high strength concrete of C80; Embodiment the 5, the 6th, and light aggregate concrete, light-weight aggregate are haydites of book structure, 800 grades of density ratings, apparent density 1300kg/m ³Embodiment the 7, the 8th, baryte, bar apparent density 4200kg/m ³Need to prove, flowability is measured with existing standard, the purpose of listing it is: pass through current measuring methods, only on the size of the slump and divergence, be to reflect well that concrete is in the pumping construction process, other serviceabilitys except that mobile particularly under all very big situation of the numerical value of the slump and divergence.

Table 1

Table 2 is that the concrete mix of the listed embodiment 1-8 of table 1 uses said method to measure the data of homogenieity and glutinous poly-property.

Table 2

As shown in Table 2, use this said apparatus can measure the homogeneity and glutinous poly-property of concrete mix comparatively easily.

Protection domain of the present utility model is not limited to the above embodiments, and other technical scheme identical with the utility model essence all belongs to the scope of the utility model protection.

Claims (3)

1. measure concrete mix homogeneity and the glutinous device that gathers property, it is characterized in that it comprises support, coaster, hopper, hopper and baffle plate; Support comprises two parallel slide rails and in order to support the supporting leg of slide rail; Coaster is located on two slide rails; Hopper is fixed on the coaster, and the bottom of hopper offers discharge port; Hopper is positioned at the below of two parallel slide rails, and hopper is arranged in order along the direction that is parallel to slide rail by the identical magazine of a plurality of shapes and forms; One end of support is fixed with baffle plate, baffle plate be positioned at slide rail under, baffle plate and slide rail be arranged in parallel, when coaster is positioned at reference position, the discharge port of baffle plate sealing hopper.

2. measurement concrete mix homogeneity according to claim 1 and the glutinous device that gathers property is characterized in that: being shaped as of described hopper is inverted terrace with edge shape or is inverted taper type.

3. measurement concrete mix homogeneity according to claim 1 and the glutinous device that gathers property, it is characterized in that: described coaster is the electrodynamic type coaster.

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