CN102323396A - Mass concrete solid simulation testing device and trial construction method - Google Patents
Mass concrete solid simulation testing device and trial construction method Download PDFInfo
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- CN102323396A CN102323396A CN201110173463A CN201110173463A CN102323396A CN 102323396 A CN102323396 A CN 102323396A CN 201110173463 A CN201110173463 A CN 201110173463A CN 201110173463 A CN201110173463 A CN 201110173463A CN 102323396 A CN102323396 A CN 102323396A
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Abstract
The invention relates to a mass concrete solid simulation testing device and a trial construction method. The mass concrete solid simulation testing device comprises a test block body made of reinforced concrete material, and a temperature measurement sensor, a temperature measurement line and a temperature measurement instrument which are used for measuring the test block body, wherein the height of the test block body is the same with that of a mass concrete structure planned to be poured, the length and the wide of the test block body are not smaller than 4m, and the mixture ratio of a raw material to concrete adopted in making the test block body is the same with the mixture ratio of a raw material to concrete adopted in the mass concrete structure planned to be poured; and a reinforced-steel bar bracket is pre-buried in the test block body and comprises six vertical-fixing reinforced bars and horizontal-fixing reinforced bars connected among the vertical-fixing reinforced bars, and at least three temperature measurement points are respectively arranged on each vertical-fixing reinforced bar. The mass concrete solid simulation testing device and the trial construction method provided by the invention are simple and reliable, various construction data can be obtained earlier, so that problems and deficiencies existing in a scheme can be found to provide invaluable experience for formal construction, and the quality risk of the mass concrete can be reduced to the minimum.
Description
Technical field
The present invention relates to the concrete detection range, particularly a kind of entity test unit and test construction method that is applied in the mass concrete construction.
Background technology
Traditional mass concrete construction; At first be according to design and code requirement establishment arrangement and method for construction, arrangement and method for construction promptly can be used for (being that traditional construction method just directly is used for formal construction usually after solution formulation) in the engineering practice after relevant departments and personnel's approval; But can the various technical measures of formulating in the arrangement and method for construction play a role by efficiently and effectively in construction; Can in practice of construction, can obtain good effect; Whether there are deficiency and hidden danger; And can each item technical indicators such as concrete casting building technology, temperature control, workability of concrete ability satisfy construction and quality requirements, all can't obtain checking in advance, so tend to because inconsiderate and cause the construction quality defective to certain details in the scheme in advance; Such as often causing that owing to hydration heat of cement concrete internal temperature sharply raises; Temperature difference between inside and outside concrete causes the variation of temperature-differential contraction stress, causes concrete structures the crack to occur, influences the use and the permanance of structure.
Summary of the invention
The purpose of this invention is to provide a kind of mass concrete entity simulation test device and test construction method thereof, solve the technical matters that the concrete each item technical indicator in traditional mass concrete construction can't be verified in advance.
For realizing above-mentioned purpose; The present invention adopts following technical scheme: a kind of mass concrete entity simulation test device; Comprise the test block of reinforced concrete material and temperature probe, thermometric line, the temperature measurer that the experiment with measuring block is used; Said temperature probe is embedded in the point for measuring temperature in the test block and temperature probe is connected through the thermometric line temperature measurer external with being positioned at test block; It is characterized in that: the test block is the square shape; The height of test block is identical with the height of intending the large volume concrete structural build, the length and the wide 4m that all is not less than of test block, and it is identical to make starting material that large volume concrete structural adopted and concrete mix that the test starting material that block adopted and concrete mix and plan build.
Be embedded with Steel bar rack in the test block; This Steel bar rack comprises vertically fixing reinforcing bar and be connected the vertical fixedly horizontal fixed reinforcing bar between the reinforcing bar of the six roots of sensation; The said six roots of sensation is the fixing reinforcing bar triangular arrangement that meets at right angles vertically; Wherein three is three angles of right-angle triangle; Two in other three lay respectively at the centre position of two right-angle sides of right-angle triangle, the 3rd centre position that is positioned at the hypotenuse of right-angle triangle; The right angle of right-angle triangle is positioned at the wherein position of center line of a side side of test block, and one of them oblique angle of right-angle triangle is positioned at the center of test block, and another oblique angle of right-angle triangle is positioned at the vertical seamed edge position of test block.
Every vertically fixedly is equipped with at least three points for measuring temperature on the reinforcing bar; Wherein first point for measuring temperature is positioned at the bottom of test block; Second point for measuring temperature is positioned at the centre position of test block; The 3rd point for measuring temperature is positioned at the top of test block; Be equipped with two temperature probes in each point for measuring temperature, one of them temperature probe is tied up on vertical fixedly reinforcing bar and the outside of this temperature probe is with protective cover, and another temperature probe is also tied up on vertical fixedly reinforcing bar and this temperature probe and the vertical concrete pad that fixedly is lined with between the reinforcing bar.
The bottom surface of the point for measuring temperature of the bottom of said test block and test block is at a distance of 40mm～60mm, and the upper surface of the point for measuring temperature on the top of test block and test block is at a distance of 40mm～60mm.
Also be provided with point for measuring temperature between the centre position of the bottom of said test block and test block.
Also be provided with point for measuring temperature between the top of the centre position of said test block and test block.
The said vertical fixedly upper end of reinforcing bar extend out on the upper surface of test block.
A kind of test construction method of using above-mentioned mass concrete entity simulation test device is characterized in that step is following: step 1, according to the design and the requirement of standard, the arrangement and method for construction of establishment large volume concrete structural.
The concrete data of each item and the check test block that collect in step 3, the arrangement step 2; When the test block does not go wrong and concrete data of each item when satisfying code requirement; Directly carry out next step; When concrete internal temperature >=75 ℃ of test block; Adopt the method that reduces molding temperature and/or optimize match ratio to optimize arrangement and method for construction; When inside concrete surpasses code requirement with surface, surface and circumstance of temperature difference, adopt the method that increases insulation layer thickness and/or strengthen the warm water maintenance to optimize arrangement and method for construction, when concrete slump loss is excessive; The method optimization arrangement and method for construction of match ratio is checked and/or is optimized in employing according to water content of sandstone adjustment construction match ratio, to starting material such as sandstones; When surface weeping of concrete is serious, adopt according to water content of sandstone adjustment construction match ratio, starting material such as sandstone checked and/or the method for optimizing match ratio is optimized arrangement and method for construction, when concrete pumping not smooth; Easily during plugging; Employing is according to water content of sandstone adjustment construction match ratio, check and/or the method for optimizing match ratio is optimized arrangement and method for construction starting material such as sandstones, when concrete surface crack, adopt reduce molding temperature, according to water content of sandstone adjustment construction match ratio, increase insulation layer thickness, strengthen the warm water maintenance, prolong the maintenance striking time, starting material such as sandstone are checked and/or the method for optimizing match ratio is optimized arrangement and method for construction.
Compared with prior art the present invention has following characteristics and beneficial effect: the defective that the present invention exists to traditional mass concrete construction just; Before formal construction, utilize the entity simulation test to gather concrete various construction data, grasp the effect of arrangement and method for construction in practical application in advance.In the mass concrete construction process; Through simulation test of the present invention and summing up experience; Can make the validity of arrangement and method for construction obtain checking in advance; Guarantee technical indicators such as the temperature control in the mass concrete construction, workability of concrete ability in controlled range, and finally guaranteed the construction quality of mass concrete engineering.If found problem through the present invention, then can be optimized targetedly arrangement and method for construction, prevent the generation in the harmful crack of concrete thus, guarantee construction quality.
Advantage of the present invention just is to have remedied in traditional mass concrete construction method and lacks effectively this link of checking between solution formulation and the formal construction; Described test unit and test construction method are simple and reliable; Can obtain various construction datas in advance, the problem and shortage that exists in the discovery scheme is so that prioritization scheme; For formal construction obtains invaluable experience, make the quality risk of mass concrete drop to minimum.
Principle of the present invention be exactly with formal when construction same environment and the condition of method under; Use with the identical concrete mix of large volume concrete structural and build a mass concrete entity simulation test device, applicable to the construction of mass concrete engineerings such as various high-rise buildings basis, large-scale metallurgical Equipment Foundations, large-scale power (comprising nuclear power) Equipment Foundations, large-scale culture and sports shop, terminal.
Description of drawings
Below in conjunction with accompanying drawing the present invention is done further detailed explanation.
Fig. 1 is the schematic top plan view of mass concrete entity simulation test device.
Fig. 2 is the synoptic diagram of A-A section among Fig. 1.
Fig. 3 is the enlarged diagram at I place among Fig. 2.
Fig. 4 is the schematic perspective view of mass concrete entity simulation test device.
Fig. 5 is formwork and the synoptic diagram of building the test block.
Fig. 6 is a synoptic diagram of setting up maintenance canopy maintenance test block.
Fig. 7 is a test construction FB(flow block) of using mass concrete entity simulation test device.
Reference numeral: 1-test block, 2-be fixedly reinforcing bar, 3-horizontal fixed reinforcing bar, 4-temperature probe, 5-thermometric line, 6-temperature measurer, 7-protective cover, 8-concrete pad, 9-point for measuring temperature, 10-template, 11-support system, 12-framing scaffold, 13-maintenance canopy vertically.
Embodiment
Embodiment is referring to shown in Fig. 1-4; This mass concrete entity simulation test device; Comprise the test block 1 of reinforced concrete material and temperature probe 4, thermometric line 5, the temperature measurer 6 of experiment with measuring block 1 usefulness; Said temperature probe 4 be embedded in the point for measuring temperature 9 in the test block 1 and temperature probe 4 through thermometric line 5 be positioned at test block 1 temperature measurer 6 outward and be connected; Test block 1 is the square shape; The height of test block 1 is identical with the height of intending the large volume concrete structural build, the length and the wide 4m that all is not less than of test block 1, and it is identical to make starting material that large volume concrete structural adopted and concrete mix that starting material that test block 1 adopted and concrete mix and plan build.
Be embedded with Steel bar rack in the test block 1; This Steel bar rack comprises vertically fixing reinforcing bar 2 and be connected the vertical fixedly horizontal fixed reinforcing bar 3 between the reinforcing bar of the six roots of sensation; The said six roots of sensation is fixing reinforcing bar 2 triangular arrangement that meets at right angles vertically; Wherein three is three angles of right-angle triangle; Two in other three lay respectively at the centre position of two right-angle sides of right-angle triangle, the 3rd centre position that is positioned at the hypotenuse of right-angle triangle; The right angle of right-angle triangle is positioned at the wherein position of center line of a side side of test block 1, and one of them oblique angle of right-angle triangle is positioned at the center of test block 1, and another oblique angle of right-angle triangle is positioned at the vertical seamed edge position of test block 1.The said vertical fixedly upper end of reinforcing bar 2 extend out on the upper surface of test block 1.
Every vertically fixedly is equipped with at least three points for measuring temperature 9 on the reinforcing bar 2; Wherein first point for measuring temperature is positioned at the bottom of test block 1; Second point for measuring temperature is positioned at the centre position of test block 1; The 3rd point for measuring temperature is positioned at the top of test block 1; Be equipped with two temperature probes 4 in each point for measuring temperature, one of them temperature probe is tied up on vertical fixedly reinforcing bar 2 and the outside of this temperature probe is with protective cover 7, and another temperature probe is also tied up on vertical fixedly reinforcing bar 2 and this temperature probe and the vertical concrete pad 8 that fixedly is lined with between the reinforcing bar 2.The bottom surface of the point for measuring temperature 9 of the bottom of said test block 1 and test block 1 is at a distance of 40mm～60mm, and the upper surface of the point for measuring temperature 9 on the top of test block 1 and test block 1 is at a distance of 40mm～60mm.In the present embodiment, between the bottom of test block 1 and the centre position of test block 1, the centre position of test block 1 and test between the top of block 1 and all also be provided with point for measuring temperature, so one has five layers of point for measuring temperature.
In addition, in other embodiments, to different large volume concrete structurals, test block 1 also can be the cylindrical shape that diameter is not less than 4m.
The test construction method of the above-mentioned mass concrete entity of this application simulation test device, its step is following: step 1, according to the design and the requirement of standard, the arrangement and method for construction of establishment large volume concrete structural.
The concrete data of each item and the check test block 1 that collect in step 3, the arrangement step 2; When test block 1 does not go wrong and concrete data of each item when satisfying code requirement; Directly carry out next step; When concrete internal temperature >=75 ℃ of test block 1; Adopt the method that reduces molding temperature and/or optimize match ratio to optimize arrangement and method for construction; When inside concrete surpasses code requirement with surface, surface and circumstance of temperature difference, adopt the method that increases insulation layer thickness and/or strengthen the warm water maintenance to optimize arrangement and method for construction, when concrete slump loss is excessive; The method optimization arrangement and method for construction of match ratio is checked and/or is optimized in employing according to water content of sandstone adjustment construction match ratio, to starting material such as sandstones; When surface weeping of concrete is serious, adopt according to water content of sandstone adjustment construction match ratio, starting material such as sandstone checked and/or the method for optimizing match ratio is optimized arrangement and method for construction, when concrete pumping not smooth; Easily during plugging; Employing is according to water content of sandstone adjustment construction match ratio, check and/or the method for optimizing match ratio is optimized arrangement and method for construction starting material such as sandstones, when concrete surface crack, adopt reduce molding temperature, according to water content of sandstone adjustment construction match ratio, increase insulation layer thickness, strengthen the warm water maintenance, prolong the maintenance striking time, starting material such as sandstone are checked and/or the method for optimizing match ratio is optimized arrangement and method for construction.
When carrying out step 2, all raw material that test block 1 adopts all needs identical with all raw material and the match ratio of large volume concrete structural employing with match ratio.The height of test block 1 is identical with the large volume concrete structural that plan is built, and the length and width size (or diameter) of test block 1 is not less than 4m, can make the concrete center of test block body 1 be similar to thermal insulation like this.All technical measures such as the concrete stirring means of being taked when making mass concrete entity simulation test device, transportation resources, haulage time, pump tube length, casting method, maintenance process, temp measuring method all need when building large volume concrete structural identical.
Referring to Fig. 7, be example with certain engineering, making and use mass concrete entity simulation test device carry out the embodiment of mass concrete simulation test in the description of step two; The long 70.11m of the volume of concrete foundation of this project; Wide 21.70m, high 4.5m, the about 6000m3 of concrete total amount.Strength grade of concrete is an Europe superscript C40/50 concrete.
A, location unwrapping wire.The concrete cushion of 100mm should be arranged at the bottom of mass concrete entity simulation test device, emits position line and point for measuring temperature position line according to the tentative module design size.
B, installation point for measuring temperature 9.The layout of point for measuring temperature; Should reflect maximum temperaturerise in the concreting body truly; In show the temperature difference, rate of temperature fall and environment temperature; The layout scope of temperature probe should be the test section with half bar axis of the selected concreting body plane figure axis of symmetry, and point for measuring temperature is pressed the planar layer layout in the test section; Along concreting body thickness direction, must arrange outside, bottom surface and medium temperature measuring point.Present embodiment from concrete bottom up 50mm to the concrete upper surface down 50mm, every one deck point for measuring temperature is installed at a distance from 1125mm; 5 layers of totally 30 point for measuring temperature are set altogether; Each point for measuring temperature is all installed two temperature probes 4; In work progress, a temperature probe has damaged, and also has a backup can use (another contrasts use each other in the time of can also thermometric).Before temperature probe 4 uses; Must carry out the thermometric test to each point for measuring temperature; Error should be in 0.3 ℃; All temperature probes 4 all are fixed on the pre-buried Steel bar rack with adhesive tape, and with concrete pad 8 or protective cover 7 protections (protective cover 7 in the present embodiment is pvc pipes), avoid concrete vibrating infringement temperature probe 4.Stretch out an end of test block 1 at thermometric line 5 and carry out label, the collection and the record of data during in order to the concrete curing thermometric.
C, referring to Fig. 5, mounting template 10, support system 11 and framing scaffold 12.Specifically; Be exactly planar dimension mounting template and support system according to the location unwrapping wire; The material of template and support system and formal engineering are consistent, and template all around all need exceed about concrete surface 100mm, and carries out the absolute altitude mark of concrete surface; And offer the osculum of 50mm * 50mm at this absolute altitude place, be used for concrete bleeding and handle.The template end opening is used the mortar shutoff in advance, and the template edge joint position is pasted with double-sided tape, prevents spillage.
D, concrete stir.Raw-material temperature when concrete stirs, Mixing Machine, basically identical when mixing time must be constructed with entity, wherein the cement temperature should be greater than 50 ℃, and the number needs that adds cold water or ice is calculated according to the temperature and the match ratio of concrete raw material.This moment, the data that will gather had raw-material temperature such as sand, stone, cement, water, additive, and water content of sandstone, atmospheric temperature, out-of-machine temperature, went out data such as the machine slump.
E, concrete transportation.The concrete transportation tank car is adopted in the concrete transportation in this engineering; Be delivered in the template by the ground pump after being transported to pouring location; Because temperature is higher when building, for guarantee concrete in transportation not because of extraneous thermal effect causes the bigger rising of temperature, we are in concrete delivery truck tank body outerwrap heat-preservation cotton; Concrete pump line external application pvc pipe and insulation bale of cotton ice block cooling are with the actual effect of proof scheme.Should notice that concrete means of transport, haulage time, apparatus for distributing are all consistent with conceptual design and formal casting concrete.The data that will gather this moment have haulage time, the on-site concrete slump, concrete to go into data such as pump temperature.
F, concreting.Be the fully actual situation of building of simulation, should be during simulation test concreting by the lift height of scheme, interval time of two layer concretes up and down during actual building, same vibrating method, free-falling height etc.To note the concrete lift height of simulation test and interval time of two layer concretes up and down especially; Because the simulation test amount of concrete is less; The workman is may one-time-concreting thickness excessive or two layer concretes are too short interval time up and down in when operation; This is not inconsistent during all with the structure practice of construction, and it is too fast to cause concrete internal temperature to raise, and can not reach the effect of simulating actual conditions.The data that will gather this moment have the concrete molding temperature, and average vibrating time is built beginning and deadline etc.
G, secondary vibration.According to the mass concrete construction standard etc., should adopt secondary vibration after the concreting, carrying out secondary vibration before in the intact 1～2h of one deck concreting initial set afterwards, vibrating spear should stretch into lower-layer concrete 50mm during secondary vibration.The operator on duty tackles the interval time and the vibrating time of concrete secondary vibration and carries out record.The data that will gather this moment have the secondary vibration time.
H, bleeding are handled.As excreting water phenomenon appears; To in time handle; Can take around side form top offer osculum, make supernatant unnecessary grout from osculum naturally the discharge, the concrete of one side is a little more than the concrete of opposite side when blanking; Make concrete form catch pit naturally, use manual work or small pump then measures such as bleeding eliminatings.At this moment, the surface weeping of concrete situation is wanted record acquisition.
I, concrete pressure surface.Before concrete initial set, carry out smearing the first time pressure at the concrete upper surface with wooden float.The secondary pressure surface time generally can be pressed concrete surface with finger, is as the criterion but begin when feeling plasticity is arranged to press, and observes the concrete surface situation at any time, finds obvious crack, in time carry out pressure surface once more.The data that will gather this moment have the concrete concrete pressure surface time first time and secondary pressure surface time etc.
The mensuration of j, workability of concrete ability time.The assay method of workability of concrete ability time is: collateral branch establishes a cube die trial that is of a size of 1m * 1m * 1m in the test place; Build the concrete of height 0.5m～0.8m earlier, vibrate once with vibrating spear in every interval 20 minutes after having built 1 hour, fast slottingly pull out slowly when vibrating; Observe vibrating spear and extract the concrete recovery situation in back; If can not restore, explain that concrete has not possessed serviceability, carries out time keeping simultaneously.But there are certain difference concrete serviceability time and concrete initial set time; Because often there is certain difficulty or inaccurate the on-site measurement concrete initial set time, but take above method to be determined at that there is very important directive significance the concrete serviceability time to execute-in-place under the certain environment temperature.When the collection workability of concrete can the time can be used for instructing casting of concrete in mass; Last layer concrete is carried out the longest interval time of covering lower-layer concrete; But avoid occurring surpassing the serviceability time because of concrete; The vibrating spear hole of vibrating when inserting lower-layer concrete can not be restored, and brings hidden danger to concrete quality.
K, referring to Fig. 6, concrete curing and thermometric.The mode of maintenance canopy 13 is set up in employing, i.e. one to two layer of insulation material laid in covering insulation material maintenance immediately after the concrete final set earlier, and keeps insulation material moistening.According to temperature measurement data, after concrete rises to maximum temperature, when being tending towards lowering the temperature, increase the covering number of plies again.The side curing in the mold, concrete final set and reach certain intensity after diagonal brace around the form removal, at template outerwrap insulation material, play the effect of insulation.Curing time is no less than 14 days, will remove in advance because of duration or other reasons side form like the scene, after removing side form, carries out insulation immediately and covers.Thermometric should begin after concrete coating is accomplished immediately, and 1～3d thermometric interval time is 2h after the concreting, and 4～7 days is 4h, is thereafter 8h, and when internal temperature was higher than 60 ℃, be 1h interval time, when temperature no longer raises, adopts former thermometric frequency.Heat-insulation layer is carried out the cap rock number should do corresponding adjustment according to actual temperature measurement data, guarantees that the inside concrete and the concrete surface temperature difference are controlled in 25 ℃, and concrete surface and circumstance of temperature difference are in 20 ℃, and concrete rate of temperature fall should not be greater than 2 ℃/d.At any time carry out temperature observation; Note temperature difference between inside and outside concrete; Strengthen maintenance when concrete internal temperature and the surface temperature temperature difference should increase the coverture number of plies greater than 23 ℃ or concrete surface and circumstance of temperature difference during greater than 18 ℃, inner and surface temperature difference can reduce coverture less than 18 ℃ or surface temperature of concrete and the environment temperature temperature difference during less than 13 ℃.Note when concrete curing method is all wanted scheme with practice of construction with the thermometric frequency identical.The data that will gather this moment have concrete center maximum temperature, temperature difference between inside and outside concrete, and environment temperature, the temperature difference and insulation material cover the data such as relation of the number of plies.
L, data preparation.The purpose of simulation test is that the construction for formal engineering mass concrete provides construction experience and related data, also is important work of simulation test so the data of being gathered in the simulation test procedure are put in order.In process of the test, will gather each data and must decide the people and determine a post, the special messenger is responsible for, and in time various data is filled in; Concrete temperature writes down not only conscientiously record, also wants the formation temperature curve, so that inspection control intuitively.
Through data preparation; When using mass concrete entity simulation test device to carry out the mass concrete simulation test; Atmosphere temperature on average is 26 ℃, and 18 ℃～19 ℃ of the average out-of-machine temperatures of concrete, concrete are on average gone into 22 ℃～23 ℃ of pump temperature; Average molding temperature after pump line is carried is 21 ℃～22 ℃, has reached the molding temperature≤23 ℃ requirement that begins solution formulation most.In addition, 70.8 ℃ of inside concrete maximum temperatures (designing requirement is≤75 ℃), 23 ℃ of concrete center and surperficial maximum temperature differences, 17 ℃ of concrete surface and environment maximum temperature differences all satisfy design and code requirement; Steam turbine pedestal basis through actual build completion after, all data all conform to simulation test basically.Maintenance is observed after accomplishing form removal, and the basic free from flaw in surface reaches the quality objective that expection is controlled fully.
Claims (6)
1. mass concrete entity simulation test device; Comprise the test block (1) of reinforced concrete material and temperature probe (4), thermometric line (5), the temperature measurer (6) of experiment with measuring block (1) usefulness; Said temperature probe (4) is embedded in the point for measuring temperature (9) in the test block (1) and temperature probe (4) is connected through thermometric line (5) temperature measurer (6) outer with being positioned at test block (1); It is characterized in that: test block (1) is the square shape; The height of test block (1) is identical with the height of intending the large volume concrete structural of building; The length and the wide 4m that all is not less than of test block (1), it is identical to make starting material that large volume concrete structural adopted and concrete mix that starting material that test block (1) adopted and concrete mix and plan build;
Be embedded with Steel bar rack in the test block (1); This Steel bar rack comprises vertically fixing reinforcing bar (2) and be connected the vertical fixedly horizontal fixed reinforcing bar (3) between the reinforcing bar of the six roots of sensation; The said six roots of sensation is fixing reinforcing bar (2) triangular arrangement that meets at right angles vertically; Wherein three is three angles of right-angle triangle; Two in other three lay respectively at the centre position of two right-angle sides of right-angle triangle, the 3rd centre position that is positioned at the hypotenuse of right-angle triangle; The right angle of right-angle triangle is positioned at the wherein position of center line of a side side of test block (1), and one of them oblique angle of right-angle triangle is positioned at the center of test block (1), and another oblique angle of right-angle triangle is positioned at the vertical seamed edge position of test block (1);
Every vertically fixedly is equipped with at least three points for measuring temperature (9) on the reinforcing bar (2); Wherein first point for measuring temperature is positioned at the bottom of test block (1); Second point for measuring temperature is positioned at the centre position of test block (1); The 3rd point for measuring temperature is positioned at the top of test block (1); Be equipped with two temperature probes (4) in each point for measuring temperature, one of them temperature probe is tied up at vertical fixedly reinforcing bar (2) and is gone up and the outside of this temperature probe is with protective cover (7), and another temperature probe is also tied up at vertical fixedly reinforcing bar (2) upward and this temperature probe and the vertical concrete pad (8) that fixedly is lined with between the reinforcing bar (2).
2. mass concrete entity simulation test device according to claim 1; It is characterized in that: the bottom surface of the point for measuring temperature (9) of the bottom of said test block (1) and test block (1) is at a distance of 40mm～60mm, and the upper surface of the point for measuring temperature (9) on the top of test block (1) and test block (1) is at a distance of 40mm～60mm.
3. mass concrete entity simulation test device according to claim 1 is characterized in that: also be provided with point for measuring temperature between the centre position of the bottom of said test block (1) and test block (1).
4. mass concrete entity simulation test device according to claim 1 is characterized in that: also be provided with point for measuring temperature between the top of the centre position of said test block (1) and test block (1).
5. mass concrete entity simulation test device according to claim 1 is characterized in that: the said vertical fixedly upper end of reinforcing bar (2) extend out on the upper surface of test block (1).
6. test construction method of using above-mentioned mass concrete entity simulation test device is characterized in that step is following:
Step 1, according to the design and the requirement of standard, the arrangement and method for construction of establishment large volume concrete structural;
Step 2, with formal when construction same environment and the condition of construction method under; Make a mass concrete entity simulation test device; Make the center of the test block (1) in this mass concrete entity simulation test device be similar to thermal insulation; And in entire making process, measure concrete raw material temperature, water content of sandstone, atmospheric temperature, concrete out-of-machine temperature, go into pump temperature, molding temperature, go out the machine slump, the on-the-spot slump, workability of concrete can the times, average vibrating time, secondary vibration time, surperficial bleeding situation, pressure surface time, secondary pressure surface time, maintenance temperature of shed, concrete environment temperature, inside concrete maximum temperature, concrete surface maximum temperature, inside concrete and surface temperature difference and concrete surface and circumstance of temperature difference for the first time;
The concrete data of each item and the check test block (1) that collect in step 3, the arrangement step 2; When test block (1) does not go wrong and concrete data of each item when satisfying code requirement; Directly carry out next step; When concrete internal temperature >=75 ℃ of test block (1); Adopt the method that reduces molding temperature and/or optimize match ratio to optimize arrangement and method for construction; When inside concrete surpasses code requirement with surface, surface and circumstance of temperature difference, adopt the method that increases insulation layer thickness and/or strengthen the warm water maintenance to optimize arrangement and method for construction, when concrete slump loss is excessive; The method optimization arrangement and method for construction of match ratio is checked and/or is optimized in employing according to water content of sandstone adjustment construction match ratio, to starting material such as sandstones; When surface weeping of concrete is serious, adopt according to water content of sandstone adjustment construction match ratio, starting material such as sandstone checked and/or the method for optimizing match ratio is optimized arrangement and method for construction, when concrete pumping not smooth; Easily during plugging; Employing is according to water content of sandstone adjustment construction match ratio, check and/or the method for optimizing match ratio is optimized arrangement and method for construction starting material such as sandstones, when concrete surface crack, adopt reduce molding temperature, according to water content of sandstone adjustment construction match ratio, increase insulation layer thickness, strengthen the warm water maintenance, prolong the maintenance striking time, starting material such as sandstone are checked and/or the method for optimizing match ratio is optimized arrangement and method for construction;
Step 4, do not go wrong and concrete data of each item when satisfying code requirement when test block (1); Adopt the arrangement and method for construction described in the step 1 to carry out the large volume concrete structural construction; When the problem described in the step 3 appears in test block 1, adopt the arrangement and method for construction that correspondence was optimized in the step 3 to carry out the large volume concrete structural construction.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103913514A (en) * | 2013-01-05 | 2014-07-09 | 山东三箭建设工程管理有限公司 | Method for monitoring temperature and gradient cracks of large-volume concrete |
| CN106053214A (en) * | 2016-07-28 | 2016-10-26 | 西安工业大学 | Testing apparatus for research of imposed load of bed separation to anchor pole and manufacturing method |
| CN106353007A (en) * | 2016-08-29 | 2017-01-25 | 长安大学 | Precise testing device for temperature gradients of concrete structure and testing method of precise testing device |
| CN108196038A (en) * | 2017-12-21 | 2018-06-22 | 中国水利水电科学研究院 | The test equipment and method of coagulation soil scene mechanics parameter under a kind of practical curing condition |
| CN108459154A (en) * | 2018-05-16 | 2018-08-28 | 山东省公路桥梁建设有限公司 | A kind of wet seam testing stand of concrete with constraint function and test method |
| CN108828200A (en) * | 2018-07-10 | 2018-11-16 | 珠海春禾新材料研究院有限公司 | A kind of ready-mixed concrete mixture travel position simulation test device and method |
| CN109164250A (en) * | 2018-09-28 | 2019-01-08 | 镇江科易工程检测技术有限公司 | A kind of remote copy formula engineering structure concrete strength and deformation test system |
| CN110455600A (en) * | 2019-09-20 | 2019-11-15 | 中建西部建设贵州有限公司 | A kind of prevention of mass concrete surface topography, the temperature difference and shrinkage detect die trial |
| CN113959588A (en) * | 2021-09-27 | 2022-01-21 | 北京金河水务建设集团有限公司 | Temperature measuring method for mass concrete curing construction |
| CN114790743A (en) * | 2022-06-06 | 2022-07-26 | 保利长大工程有限公司 | Heat insulation maintenance method for high-grade large-volume concrete member |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913514A (en) * | 2013-01-05 | 2014-07-09 | 山东三箭建设工程管理有限公司 | Method for monitoring temperature and gradient cracks of large-volume concrete |
| CN106053214A (en) * | 2016-07-28 | 2016-10-26 | 西安工业大学 | Testing apparatus for research of imposed load of bed separation to anchor pole and manufacturing method |
| CN106353007A (en) * | 2016-08-29 | 2017-01-25 | 长安大学 | Precise testing device for temperature gradients of concrete structure and testing method of precise testing device |
| CN108196038A (en) * | 2017-12-21 | 2018-06-22 | 中国水利水电科学研究院 | The test equipment and method of coagulation soil scene mechanics parameter under a kind of practical curing condition |
| CN108459154A (en) * | 2018-05-16 | 2018-08-28 | 山东省公路桥梁建设有限公司 | A kind of wet seam testing stand of concrete with constraint function and test method |
| CN108459154B (en) * | 2018-05-16 | 2023-11-03 | 山东省公路桥梁建设有限公司 | Concrete wet joint test bed with constraint function and test method |
| CN108828200A (en) * | 2018-07-10 | 2018-11-16 | 珠海春禾新材料研究院有限公司 | A kind of ready-mixed concrete mixture travel position simulation test device and method |
| CN109164250A (en) * | 2018-09-28 | 2019-01-08 | 镇江科易工程检测技术有限公司 | A kind of remote copy formula engineering structure concrete strength and deformation test system |
| CN110455600A (en) * | 2019-09-20 | 2019-11-15 | 中建西部建设贵州有限公司 | A kind of prevention of mass concrete surface topography, the temperature difference and shrinkage detect die trial |
| CN113959588A (en) * | 2021-09-27 | 2022-01-21 | 北京金河水务建设集团有限公司 | Temperature measuring method for mass concrete curing construction |
| CN114790743A (en) * | 2022-06-06 | 2022-07-26 | 保利长大工程有限公司 | Heat insulation maintenance method for high-grade large-volume concrete member |
| CN114790743B (en) * | 2022-06-06 | 2024-05-31 | 保利长大工程有限公司 | Heat insulation maintenance method for high-grade large-volume concrete member |
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