CN102323396B - 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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- CN102323396B CN102323396B CN201110173463.4A CN201110173463A CN102323396B CN 102323396 B CN102323396 B CN 102323396B CN 201110173463 A CN201110173463 A CN 201110173463A CN 102323396 B CN102323396 B CN 102323396B
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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 concrete NDT field, particularly a kind of entity test unit and test construction method being applied in mass concrete construction.
Background technology
Traditional mass concrete construction, first be that arrangement and method for construction can be used for (being that traditional construction method is just directly used in formal construction conventionally after solution formulation) in engineering practice after relevant departments and personnel's approval according to design and code requirement establishment arrangement and method for construction, but can the various technical measures of formulating in arrangement and method for construction play a role by efficiently and effectively in construction, can in practice of construction, can obtain good effect, whether Shortcomings and hidden danger, and concrete casting building technology, temperature control, can all technicals such as concrete work performance meet construction and quality requirements, all cannot be verified in advance, so tend to because inconsiderate to certain details in scheme and cause Construction defect in advance, such as often sharply raising because hydration heat of cement causes concrete internal temperature, temperature difference between inside and outside concrete causes the variation of temperature-differential contraction stress, cause concrete structures to occur crack, affect use and the permanance of structure.
Summary of the invention
The object of this invention is to provide a kind of entity simulation test device of mass concrete and test construction method thereof, solve the technical matters that the concrete all technical in traditional mass concrete construction cannot be verified in advance.
For achieving the above object, the present invention adopts following technical scheme: a kind of entity simulation test device of mass concrete, comprise the test block of reinforced concrete material and measure the temperature probe that test block is used, thermometric line, temperature measurer, described temperature probe is embedded in the point for measuring temperature in test block and temperature probe is connected by the thermometric line temperature measurer external with being positioned at test block, it is characterized in that: test block is square shape, the height of test block is identical with the height of intending the large volume concrete structural of building, length and the wide 4m that is all not less than of test block, starting material and concrete mix that the large volume concrete structural that the starting material that making test block adopts are built with plan with concrete mix adopts are identical.
In test block, be embedded with Steel bar rack, this Steel bar rack comprises that the six roots of sensation vertically fixes reinforcing bar and be connected to the fixing reinforcing bar of level between vertical fixing reinforcing bar, the described six roots of sensation is vertically fixed the reinforcing bar triangular arrangement that meets at right angles, wherein three three angles that are right-angle triangle, in other three two lay respectively at the centre position of two right-angle sides of right-angle triangle, the 3rd is positioned at the centre position of 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 body, one of them oblique angle of right-angle triangle is positioned at the center of test block, another oblique angle of right-angle triangle is positioned at the vertical seamed edge position of test block.
On every vertical fixing reinforcing bar, be equipped with at least three points for measuring temperature; 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; in each point for measuring temperature, be equipped with two temperature probes; one of them temperature probe is tied up on vertical fixing reinforcing bar and the outside of this temperature probe cover have protective cover, another temperature probe also tie up on vertical fixing reinforcing bar and this temperature probe with vertically fix between reinforcing bar and be lined with concrete pad.
The point for measuring temperature of the bottom of described test block is with the bottom surface of test block 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.
Between the centre position of the bottom of described test block and test block, be also provided with point for measuring temperature.
Between the top of the centre position of described test block and test block, be also provided with point for measuring temperature.
The upper end of described vertical fixing reinforcing bar extend out on the upper surface of test block.
Apply a test construction method for above-mentioned entity simulation test device of mass concrete, it is characterized in that step is as follows: step 1, according to design and the requirement of standard, the arrangement and method for construction of establishment large volume concrete structural.
Compared with prior art the present invention has following characteristics and beneficial effect: the defect that the present invention exists for traditional mass concrete construction just, before formal construction, utilize entity simulation test to gather concrete various construction datas, grasp in advance arrangement and method for construction effect in actual applications.In Mass Concrete, by simulation test of the present invention summing up experience, can make the validity of arrangement and method for construction be verified in advance, guaranteed that the technical indicators such as the temperature control in mass concrete construction, concrete work performance are in controlled range, and finally guaranteed the construction quality of mass concrete engineering.If found problem by the present invention, can be optimized targetedly arrangement and method for construction, prevent thus the generation of concrete harmful cracks, guarantee construction quality.
Advantage of the present invention is just to have made up in traditional mass concrete construction method and between solution formulation and formal construction, lacks effectively this link of checking, described test unit and test construction method are simple and reliable, can obtain in advance various construction datas, the problem and shortage existing in discovery scheme, 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 is exactly under the condition of the environment same with formal when construction and method, with building an entity simulation test device of mass concrete with the identical concrete mix of large volume concrete structural, applicable to the construction of the 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.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
Fig. 1 is the schematic top plan view of entity simulation test device of mass concrete.
Fig. 2 is the schematic diagram of A-A section in Fig. 1.
Fig. 3 is the enlarged diagram at I place in Fig. 2.
Fig. 4 is the schematic perspective view of entity simulation test device of mass concrete.
Fig. 5 is formwork the schematic diagram of building test block.
Fig. 6 is the schematic diagram of setting up maintenance canopy maintenance test block.
Fig. 7 is the test construction FB(flow block) of application entity simulation test device of mass concrete.
Reference numeral: 1-test block, 2-vertically fix reinforcing bar, the fixing reinforcing bar of 3-level, 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.
Embodiment
Embodiment is referring to shown in Fig. 1-4, this entity simulation test device of mass concrete, comprise the test block 1 of reinforced concrete material and measure the temperature probe 4 of testing block 1 use, thermometric line 5, temperature measurer 6, described temperature probe 4 is embedded in the point for measuring temperature 9 in test block 1 and temperature probe 4 is connected with the temperature measurer 6 being positioned at outside test block 1 by thermometric line 5, test block 1 is square shape, the height of test block 1 is identical with the height of intending the large volume concrete structural of building, length and the wide 4m that is all not less than of test block 1, starting material and concrete mix that the large volume concrete structural that the starting material that making test block 1 adopts are built with plan with concrete mix adopts are identical.
In test block 1, be embedded with Steel bar rack, this Steel bar rack comprises that the six roots of sensation vertically fixes reinforcing bar 2 and be connected to the fixing reinforcing bar 3 of level between vertical fixing reinforcing bar, the described six roots of sensation is vertically fixed reinforcing bar 2 triangular arrangement that meets at right angles, wherein three three angles that are right-angle triangle, in other three two lay respectively at the centre position of two right-angle sides of right-angle triangle, the 3rd is positioned at the centre position of 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 body 1, one of them oblique angle of right-angle triangle is positioned at the center of test block 1, another oblique angle of right-angle triangle is positioned at the vertical seamed edge position of test block 1.The upper end of described vertical fixing reinforcing bar 2 extend out on the upper surface of test block 1.
On every vertical fixing reinforcing bar 2, be equipped with at least three points for measuring temperature 9; 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; in each point for measuring temperature, be equipped with two temperature probes 4; one of them temperature probe is tied up on vertical fixing reinforcing bar 2 and the outside of this temperature probe cover have protective cover 7, another temperature probe also tie up on vertical fixing reinforcing bar 2 and this temperature probe with vertically fix between reinforcing bar 2 and be lined with concrete pad 8.The point for measuring temperature 9 of the bottom of described test block 1 is with the bottom surface of test block 1 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 be all also provided with point for measuring temperature, so one has five layers of point for measuring temperature.
In addition, in other embodiments, for different large volume concrete structurals, test block 1 can be also the cylindrical shape that diameter is not less than 4m.
The test construction method of the above-mentioned entity simulation test device of mass concrete of this application, its step is as follows: step 1, according to design and the requirement of standard, the arrangement and method for construction of establishment large volume concrete structural.
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 of intending building, and the length and width size (or diameter) of test block 1 is not less than 4m, can make like this concrete center of test block body 1 be similar to thermal insulation.Making all technical measures such as the concrete-agitating method taked during entity simulation test device of mass concrete, transportation resources, haulage time, pump tube length, casting method, maintenance process, temp measuring method all needs when building large volume concrete structural identical.
Referring to Fig. 7, take certain engineering as example, in description of step two, make and use entity simulation test device of mass concrete to carry out the embodiment of mass concrete simulation test, the long 70.11m of 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 Europe superscript C40/50 concrete.
A, location unwrapping wire.The concrete cushion of 100mm should be arranged at the bottom of entity simulation test device of mass concrete, according to tentative module design size, emits position line and point for measuring temperature position line.
B, installation point for measuring temperature 9.The layout of point for measuring temperature, should reflect truly maximum temperaturerise in concrete casting building body, in show the temperature difference, rate of temperature fall and environment temperature, the layout scope of temperature probe should be take half bar axis of the selected concreting body plane figure axis of symmetry as test section, and in test section, point for measuring temperature is pressed planar layer layout; Along concreting body thickness direction, must arrange outside, bottom surface and medium temperature measuring point.The present embodiment from concrete bottom up 50mm to concrete upper surface down 50mm, every 1125mm, one deck point for measuring temperature is installed, 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 backup can use (another contrasts use mutually in the time of can also thermometric).Before temperature probe 4 uses; must carry out thermometric test to each point for measuring temperature; error should be in 0.3 ℃; all temperature probes 4 are all fixed on pre-buried Steel bar rack with adhesive tape; and protect (protective cover 7 in the present embodiment is pvc pipes) with concrete pad 8 or protective cover 7, avoid concrete vibrating infringement temperature probe 4.At thermometric line 5, stretch out one end of test block 1 and carry out label, collection and the record of data during in order to concrete curing thermometric.
C, referring to Fig. 5, installation form 10, support system 11 and framing scaffold 12.Specifically, be exactly according to planar dimension installation form and the support system of location unwrapping wire, the material of template and support system and formal engineering are consistent, the template of surrounding all needs to exceed concrete surface 100mm left and right, and carry out the absolute altitude mark of concrete surface, and at this absolute altitude place, offer the osculum of 50mm × 50mm, for concrete bleeding processing.Template end opening is used mortar shutoff in advance, and paste with double-sided tape at formwork edge joint place, mortar leakage prevention.
D, concrete-agitating.Raw-material temperature during concrete-agitating, basically identical when Mixing Machine, mixing time must be constructed with entity, wherein cement temperature should not be greater than 50 ℃, and the number needs that adds cold water or ice is calculated according to the temperature of concrete raw material and match ratio.The data that now will gather have the raw-material temperature such as sand, stone, cement, water, additive, and water content of sandstone, atmospheric temperature, out-of-machine temperature, go out the data such as the machine slump.
E, concrete transportation.In this engineering, concrete transportation adopts concrete transportation tank car, after being transported to pouring location, by ground pump, be delivered in template, temperature is higher owing to building, for guarantee concrete in transportation not because extraneous thermal effect causes the rising that temperature is larger, we are in concrete transportation vehicle tank outer wrapping heat-preservation cotton, concrete pump pipe external application pvc pipe and insulation bale of cotton ice block cooling, with the actual effect of proof scheme.Should notice that concrete transportation instrument, haulage time, apparatus for distributing are all consistent with conceptual design and formal casting concrete.The data that now will gather have haulage time, the on-site concrete slump, concrete to enter the data such as pump temperature.
F, concreting.For fully simulating the actual situation of building, should be by the lift height of scheme during simulation test concreting, the interval time of upper and lower two layer concretes during actual building, same vibrating method, free-falling height etc.To note especially the interval time of the concrete lift height of simulation test and upper and lower two layer concretes, because simulation test amount of concrete is less, workman is may excessive or upper and lower two layer concretes of one-time-concreting thickness too short interval time in when operation, this is not inconsistent during all with structure practice of construction, cause concrete internal temperature to raise too fast, can not reach the effect of simulating actual conditions.The data that now will gather have concrete molding temperature, and average vibrating time, builds beginning and deadline etc.
G, secondary vibration.According to mass concrete construction standard etc., after concreting, should adopt secondary vibration, before the complete 1～2h of one deck concreting initial set afterwards, carry out secondary vibration, during secondary vibration, vibrating spear should stretch into lower-layer concrete 50mm.Interval time and vibrating time that operator on duty tackles concrete secondary vibration make a record.The data that now will gather have the secondary vibration time.
H, bleeding processing.As there is excreting water phenomenon, to process in time, can take to offer osculum on surrounding side form top, make supernatant unnecessary grout Natural excrement from osculum, when blanking, the concrete of one side is a little more than the concrete of opposite side, make Concrete in Natural form catch pit, then use artificial or small pump by measures such as bleeding eliminatings.Now, surface weeping of concrete situation will record collection.
I, concrete pressure surface.Before concrete initial set, with wooden float, at concrete upper surface, smear for the first time pressure.The secondary pressure surface time generally can be pressed concrete surface with finger, is as the criterion, and observes at any time concrete surface situation but start while feeling to have plasticity to press, and finds obvious crack, carry out in time pressure surface again.The data that now will gather have concrete concrete pressure surface time and the secondary pressure surface time etc. for the first time.
The mensuration of j, concrete work performance time.The assay method of concrete work performance time is: in test site collateral branch, establish a cube die trial that is of a size of 1m × 1m × 1m, first build the concrete of height 0.5m～0.8m, at interval of 20 minutes, with vibrating spear, vibrate once having built after 1 hour, while vibrating, fast inserting pulled out slowly, observe vibrating spear and extract rear concrete recovery situation, if can not restore, illustrate that concrete has not possessed serviceability, interocclusal record while simultaneously carrying out.Concrete can the serviceability time and the concrete initial set time have certain difference, because often there is certain difficulty or inaccurate the on-site measurement concrete initial set time, taking above method to be determined at concrete at certain environment temperature can have very important directive significance to execute-in-place the serviceability time.The collection concrete work performance time is while can be used for instructing casting of concrete in mass, upper layer concrete is carried out the longest interval time of covering lower-layer concrete, avoid occurring because of concrete exceedes can the serviceability time, vibrating spear inserts the hole of vibrating during lower-layer concrete and can not restore, and to concrete quality, brings hidden danger.
K, referring to Fig. 6, concrete curing and thermometric.The mode of maintenance canopy 13 is set up in employing, i.e. covering insulation material maintenance immediately after concrete final set is first laid one to two layer of insulation material, and kept insulation material moistening.According to temperature measurement data, when concrete rises to after maximum temperature, while being tending towards lowering the temperature, then increase the covering number of plies.Side curing in the mold, concrete final set and reach some strength after form removal diagonal brace around, at template outer wrapping insulation material, play the effect of insulation.Curing time is no less than 14 days, as removed in advance because of duration or other reasons side form at scene, carries out immediately insulation and covers removing after side form.Thermometric should start immediately after concrete coating completes, and after concreting, 1～3d thermometric interval time is 2h, within 4～7 days, is 4h, is thereafter 8h, and when internal temperature is during higher than 60 ℃, be 1h interval time, until temperature adopts former thermometric frequency while no longer raising.Heat-insulation layer is carried out cap rock number should do corresponding adjustment according to actual temperature measurement data, guarantees that 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.Carry out at any time temperature observation, note temperature difference between inside and outside concrete, when concrete internal temperature and the surface temperature temperature difference are greater than, should increase the coverture number of plies strengthen maintenance when 23 ℃ or concrete surface and circumstance of temperature difference are greater than 18 ℃, inner and surface temperature difference are less than when 18 ℃ or surface temperature of concrete and the environment temperature temperature difference are less than 13 ℃ can reduce coverture.Note when concrete curing method is all wanted scheme with practice of construction with thermometric frequency identical.The data that now will gather 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 the relation of the number of plies.
L, data preparation.The object of simulation test is for the construction of formal Massive Concrete provides construction experience and related data, so the data that gather in simulation test procedure are arranged, is also important work of simulation test.In process of the test, to each data, will gather and must determine people and determine a post, special messenger is responsible for, and in time various data is filled in; Concrete temperature records not only conscientiously record, also wants formation temperature curve, to check and control intuitively.
Through data preparation, while using entity simulation test device of mass concrete to carry out mass concrete simulation test, atmosphere temperature on average is 26 ℃, 18 ℃～19 ℃ of the average out-of-machine temperatures of concrete, concrete on average enters 22 ℃～23 ℃ of pump temperature, average molding temperature after pump line is carried is 21 ℃～22 ℃, has reached the molding temperature≤23 ℃ requirement that starts 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 meet design and code requirement; Steam turbine pedestal basis is after actual having built, and all data all conform to substantially with simulation test.Maintenance is observed after completing form removal, and the basic free from flaw in surface, reaches the quality objective that expection is controlled completely.
Claims (4)
1. an entity simulation test device of mass concrete, comprise the test block (1) of reinforced concrete material and measure the temperature probe (4) of testing block (1) use, thermometric line (5), temperature measurer (6), described temperature probe (4) is embedded in the point for measuring temperature (9) in test block (1) and temperature probe (4) is connected by thermometric line (5) temperature measurer (6) outer with being positioned at test block (1), it is characterized in that: test block (1) is square shape, the height of test block (1) is identical with the height of intending the large volume concrete structural of building, length and the wide 4m that is all not less than of test block (1), starting material and concrete mix that the large volume concrete structural that the starting material that making test block (1) adopts are built with plan with concrete mix adopts are identical,
In test block (1), be embedded with Steel bar rack, this Steel bar rack comprises that the six roots of sensation vertically fixes reinforcing bar (2) and be connected to the fixing reinforcing bar (3) of level between vertical fixing reinforcing bar, the described six roots of sensation is vertically fixed reinforcing bar (2) triangular arrangement that meets at right angles, wherein three three angles that are right-angle triangle, in other three two lay respectively at the centre position of two right-angle sides of right-angle triangle, the 3rd is positioned at the centre position of 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 body (1), one of them oblique angle of right-angle triangle is positioned at the center of test block (1), another oblique angle of right-angle triangle is positioned at the vertical seamed edge position of test block (1),
On every vertical fixing reinforcing bar (2), be equipped with at least three points for measuring temperature (9), 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), in each point for measuring temperature, be equipped with two temperature probes (4), the outside cover that one of them temperature probe is tied up and this temperature probe upper at vertical fixing reinforcing bar (2) has protective cover (7), another temperature probe is also tied up between and this temperature probe and vertical fixing reinforcing bar (2) upper at vertical fixing reinforcing bar (2) and is lined with concrete pad (8),
Between the centre position of the bottom of described test block (1) and test block (1), be also provided with point for measuring temperature;
Between the top of the centre position of described test block (1) and test block (1), be also provided with point for measuring temperature.
2. entity simulation test device of mass concrete according to claim 1, it is characterized in that: the point for measuring temperature (9) of the bottom of described test block (1) is with the bottom surface of test block (1) 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. entity simulation test device of mass concrete according to claim 1, is characterized in that: the upper end of described vertical fixing reinforcing bar (2) extend out on the upper surface of test block (1).
4. apply a test construction method for entity simulation test device of mass concrete as claimed in claim 1, it is characterized in that step is as follows:
Step 1, according to design and the requirement of standard, the arrangement and method for construction of establishment large volume concrete structural;
Step 2, under the condition of the environment same with formal when construction and construction method, make an entity simulation test device of mass concrete, make the center of the test block (1) in this entity simulation test device of mass concrete be similar to thermal insulation, and in whole manufacturing process, measure concrete raw material temperature, water content of sandstone, atmospheric temperature, concrete out-of-machine temperature, enter pump temperature, molding temperature, go out the machine slump, the on-the-spot slump, the concrete work performance time, average vibrating time, the secondary vibration time, surface bleeding situation, the pressure surface time for the first time, the 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,
Step 3, arrange the every concrete data the check test block (1) that in step 2, collect, when test block (1) does not go wrong and when every concrete data meet code requirement, directly carry out next step, when concrete internal temperature >=75 ℃ of test block (1), adopt the method Optimizing Construction Scheme that reduces molding temperature and/or optimize match ratio, when inside concrete and surface, when surface exceedes code requirement with circumstance of temperature difference, adopt the method Optimizing Construction Scheme that increases insulation layer thickness and/or strengthen warm water maintenance, when concrete slump loss is excessive, employing is according to water content of sandstone adjustment construction match ratio, the starting material such as sandstone are checked and/or are optimized the method Optimizing Construction Scheme of match ratio, when surface weeping of concrete is serious, employing is according to water content of sandstone adjustment construction match ratio, the starting material such as sandstone are checked and/or are optimized the method Optimizing Construction Scheme of match ratio, when concrete pumping not smooth, during easy plugging, employing is according to water content of sandstone adjustment construction match ratio, the starting material such as sandstone are checked and/or are optimized the method Optimizing Construction Scheme of match ratio, when concrete surface crack, adopt and reduce molding temperature, according to water content of sandstone adjustment construction match ratio, increase insulation layer thickness, strengthen warm water maintenance, extend maintenance striking time, the starting material such as sandstone are checked and/or are optimized the method Optimizing Construction Scheme of match ratio,
Step 4, do not go wrong and when every concrete data meet code requirement when test block (1), adopt the arrangement and method for construction described in step 1 to carry out large volume concrete structural construction, when the problem described in step 3 appears in test block 1, adopt the corresponding arrangement and method for construction of optimizing in step 3 to carry out large volume concrete structural construction.
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| CN101021458A (en) * | 2006-11-27 | 2007-08-22 | 青岛建设集团公司 | Large volume concrete structural solid strength detecting method |
| CN100567984C (en) * | 2007-01-05 | 2009-12-09 | 华南理工大学 | Concrete setting Method Of Time Measurement based on the strain temperature on-line measurement |
| JP2011089871A (en) * | 2009-10-22 | 2011-05-06 | Seiko Epson Corp | Embedded measurement system and embedded measurement method |
| CN202119771U (en) * | 2011-06-27 | 2012-01-18 | 中国建筑第二工程局有限公司 | Entity simulation test device of mass concrete |
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2011
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