CN112067401A - Method for determining strength maintenance age of structural solid concrete - Google Patents
Method for determining strength maintenance age of structural solid concrete Download PDFInfo
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- CN112067401A CN112067401A CN202011006453.7A CN202011006453A CN112067401A CN 112067401 A CN112067401 A CN 112067401A CN 202011006453 A CN202011006453 A CN 202011006453A CN 112067401 A CN112067401 A CN 112067401A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the field of building construction, aims to solve the problems that the method for determining the equivalent curing age specified in the existing acceptance standard of the construction quality of concrete structure engineering can misjudge the strength of a solid structure in the practical engineering application and has larger error, and provides a method for determining the strength curing age of the concrete structure, which comprises the following steps: preparing a sufficient number of test pieces; putting the N groups of test pieces into a standard curing room for curing, and naturally curing the rest test pieces in an open field; measuring and recording the strength measured by the test at the maintenance age of 28 days; measuring the strength of the test piece every day after the test piece is aged for 28 days, and marking points determined by the accumulated temperature, the accumulated humidity and the strength value of each day in a three-dimensional coordinate system; and when the accumulated temperature and the accumulated humidity of the structural entity maintenance need to meet the requirement of equivalent conditions at the same time, the maintenance meets the requirement. The method has the beneficial effect that the equivalent conditions and the equivalent age of the structural entity and the standard maintenance test piece can be accurately determined.
Description
Technical Field
The invention relates to the field of constructional engineering, in particular to a method for determining the strength and curing age of concrete of a structural entity.
Background
10.1.2 regulations in the specification GB50204-2015 of acceptance of construction quality of concrete structural engineering: the equivalent curing age in concrete structure physical strength test is the age corresponding to the time when the daily average temperature is accumulated to 600 ℃ day by day.
The method for the corresponding age when the strength age of the structural entity reaches 600 ℃ according to daily average air temperature accumulation is defective, only the influence of temperature on the increase of the coagulation strength is considered, the influence of relative humidity on the increase of the coagulation strength is not considered, the humidity in different countries is different, the humidity in different seasons is different, and the concrete strength is different when the temperature is 600 ℃.
When the average temperature in spring and autumn of China is 22 ℃, the test piece is maintained for 27.3 days under the same condition, the temperature is accumulated to 600 ℃, the strength of the structural entity is not in an equivalent relation with the strength of the standard maintenance test piece, the standard maintenance condition is that the temperature is 20 +/-2 ℃, the relative humidity is more than 95%, and under the condition of the same time, the temperature of the structural entity is accumulated to 600 ℃, but the humidity is too much different from the humidity in the standard state under the natural condition, and the strength of the concrete maintained under two different humidity conditions is different and cannot be equivalent.
The humidity of the test piece under the same condition is far lower than the humidity of standard maintenance, two necessary conditions of cement hydration reaction are temperature and humidity, the maintenance age under the same condition time is only accumulated by the temperature in the quality acceptance standard, and the effect of the humidity on the concrete strength increase is not considered, so that the method of taking the daily accumulated temperature of 600 ℃ as the equivalent standard maintenance age has a large defect, the physical structure strength can be misjudged in the actual engineering application, particularly, the physical structure strength can be misjudged to be lower than the standard maintenance test piece strength, the physical structure quality is judged to be unqualified, and unnecessary detection is caused.
Disclosure of Invention
The invention aims to provide a method for determining the strength and the curing age of structural solid concrete, and aims to solve the problems that the method for determining the equivalent curing age specified in the existing acceptance criteria of the construction quality of concrete structural engineering can misjudge the strength of the structural solid concrete and has larger error in the actual engineering application.
The embodiment of the invention is realized by the following steps:
a method for determining the strength maintenance age of structural entity concrete comprises the following steps:
preparing a sufficient number of test pieces;
putting N groups of test pieces into a standard curing room for curing, wherein N is an integer more than 1, and naturally curing the rest test pieces in an open field;
recording the temperature and the humidity of natural maintenance every day, and respectively calculating the data value of the temperature and the accumulated value of the humidity;
when the maintenance age is 28 days, respectively taking N groups of standard maintenance test pieces and N groups of natural maintenance test pieces to perform a compression test, and recording the strength measured by the test; comparing the strength average value of the N groups of standard curing test pieces with the strength average value of the N groups of natural curing test pieces;
after 28 days of age, taking N groups of natural curing test pieces every day to perform a compression test, and comparing the measured average strength value of the N groups of natural curing test pieces with the average strength value of the standard curing test pieces measured in 28 days; marking points determined by the accumulated temperature, the accumulated humidity and the average value of the strength of the natural maintenance test piece measured in the same day in a three-dimensional coordinate system;
when the difference value between the average value of the strength of the natural maintenance test piece and the average value of the strength of the standard maintenance test piece is within the allowable error range, judging that the strength of the natural maintenance test piece is equivalent to the strength of the standard maintenance test piece, and taking the accumulated temperature value and humidity value as equivalent conditions of the strength of the structural entity and the strength of the standard maintenance test piece;
when the structure is applied, the accumulated temperature and the accumulated humidity for maintaining the structure entity need to meet the requirement of equivalent conditions at the same time.
According to the scheme, the corresponding relation between the strength of the structural entity and the strength of the standard maintenance test piece can be accurately reflected according to the cement hydration process mechanism and the concrete structural entity maintenance condition, and the equivalent condition and the equivalent age of the structural entity and the standard maintenance test piece are determined.
In one embodiment:
and respectively obtaining the equivalent conditions in spring and autumn, summer and winter, and confirming the accumulated temperature and accumulated humidity requirements of the maintenance of the structural entity by using the corresponding equivalent conditions in corresponding seasons.
The same intensity value corresponds to a plurality of different temperature and humidity points in the three-dimensional space, so that the corresponding equivalent age can be found under the condition that the temperature and humidity of each season and each region are different. The humidity is different from part to part throughout the country, the humidity is different from season to season, and the concrete strength is different when the temperature is accumulated to 600 ℃. So that strength is considered equivalent if the temperature cannot be simply added up to the standard curing temperature. And the equivalent conditions of all seasons are obtained respectively, so that the method has more accurate guidance value.
In one embodiment:
and N takes a value of 5-10.
In one embodiment:
and N takes a value of 5.
In one embodiment:
and connecting points determined by the accumulated temperature, the accumulated humidity and the average value of the strength of the natural maintenance test piece measured in the same day into a broken line or fitting the broken line into a spline curve.
In one embodiment:
the three-dimensional coordinate system is a space rectangular coordinate system, wherein two coordinate axes of the bottom surface are respectively a temperature accumulated value coordinate and a humidity accumulated value coordinate, and the vertical coordinate is a strength value coordinate.
In one embodiment:
the test pieces are 1000 groups in total and are prepared by mixing, stirring and mixing medium sand, broken stone, cement, polycarboxylic acid additive and fly ash and then pouring.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings referred to in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings may be obtained from these drawings without inventive effort.
The curves under standard curing conditions are shown in figure 1;
FIG. 2 shows the equivalent age curves in spring and autumn for the Chengdu area;
the summer equivalent age curve for a metropolitan area is shown in FIG. 3;
fig. 4 shows winter equivalent age curves for a metropolitan area.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
The embodiment provides a method for determining the strength maintenance age of structural entity concrete, which comprises the following steps:
preparing a sufficient number of test pieces; in the embodiment, the test pieces are prepared by mixing, stirring and mixing medium sand, gravel, cement, polycarboxylic acid additive and fly ash and then pouring 1000 groups;
putting N groups of test pieces into a standard curing room for curing, wherein N is an integer more than 1, and naturally curing the rest test pieces in an open field; generally, N can take a value of 5-10, such as N takes 5 in this embodiment;
recording the temperature and the humidity of natural maintenance every day, and respectively calculating the data value of the temperature and the accumulated value of the humidity;
when the maintenance age is 28 days, respectively taking N groups of standard maintenance test pieces and N groups of natural maintenance test pieces to perform a compression test, and recording the strength measured by the test; comparing the strength average value of the N groups of standard curing test pieces with the strength average value of the N groups of natural curing test pieces;
after 28 days of age, taking N groups of natural curing test pieces every day to perform a compression test, and comparing the measured average strength value of the N groups of natural curing test pieces with the average strength value of the standard curing test pieces measured in 28 days; marking points determined by the accumulated temperature, the accumulated humidity and the average value of the strength of the natural maintenance test piece measured in the same day in a three-dimensional coordinate system; in the embodiment, points determined by the accumulated temperature, the accumulated humidity and the average value of the strength of the natural maintenance test piece measured in the same day are connected into a spline curve; in other embodiments, it may also be fitted to a polyline; the three-dimensional coordinate system is a space rectangular coordinate system, wherein two coordinate axes of the bottom surface are respectively a temperature accumulated value coordinate and a humidity accumulated value coordinate, and a vertical coordinate is a strength value coordinate;
when the difference value between the average value of the strength of the natural maintenance test piece and the average value of the strength of the standard maintenance test piece is within the allowable error range, judging that the strength of the natural maintenance test piece is equivalent to the strength of the standard maintenance test piece, and taking the accumulated temperature value and humidity value as equivalent conditions of the strength of the structural entity and the strength of the standard maintenance test piece;
when the structure is applied, the accumulated temperature and the accumulated humidity for maintaining the structure entity need to meet the requirement of equivalent conditions at the same time.
According to the scheme, the corresponding relation between the strength of the structural entity and the strength of the standard maintenance test piece can be accurately reflected according to the cement hydration process mechanism and the concrete structural entity maintenance condition, and the equivalent condition and the equivalent age of the structural entity and the standard maintenance test piece are determined.
And respectively obtaining the equivalent conditions in spring and autumn, summer and winter, and confirming the accumulated temperature and accumulated humidity requirements of the maintenance of the structural entity by using the corresponding equivalent conditions in corresponding seasons. The same intensity value corresponds to a plurality of different temperature and humidity points in the three-dimensional space, so that the corresponding equivalent age can be found under the condition that the temperature and humidity of each season and each region are different. The humidity is different from part to part throughout the country, the humidity is different from season to season, and the concrete strength is different when the temperature is accumulated to 600 ℃. So that strength is considered equivalent if the temperature cannot be simply added up to the standard curing temperature. And the equivalent conditions of all seasons are obtained respectively, so that the method has more accurate guidance value.
As a practical result, the following curves were obtained by experiment: the curves in the standard curing state are shown in fig. 1, the equivalent age curves in spring and autumn of the Chengdu area are shown in fig. 2, the equivalent age curves in summer of the Chengdu area are shown in fig. 3, and the equivalent age curves in winter of the Chengdu area are shown in fig. 4.
Thus, for the winter construction of the Chengdu area, when the structural entity needs to be maintained to the strength of 45MPa, the graph 4 can be checked, wherein the point with the strength of 44.9MPa corresponds to the accumulated temperature value of 640 ℃ and the corresponding humidity is 2688 RH; thus, the maintenance age at which the temperature integrated value reached 640 ℃ and the humidity integrated value reached 2688RH at the time of solid maintenance was set as a criterion for achieving the required strength of 45 MPa.
The points are taken according to the corresponding seasonal curve for different seasons and intensity requirements, which is not described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A method for determining the strength maintenance age of structural entity concrete is characterized by comprising the following steps:
preparing a sufficient number of test pieces;
putting N groups of test pieces into a standard curing room for curing, wherein N is an integer more than 1, and naturally curing the rest test pieces in an open field;
recording the temperature and the humidity of natural maintenance every day, and respectively calculating the data value of the temperature and the accumulated value of the humidity;
when the maintenance age is 28 days, respectively taking N groups of standard maintenance test pieces and N groups of natural maintenance test pieces to perform a compression test, and recording the strength measured by the test; comparing the strength average value of the N groups of standard curing test pieces with the strength average value of the N groups of natural curing test pieces;
after 28 days of age, taking N groups of natural curing test pieces every day to perform a compression test, and comparing the measured average strength value of the N groups of natural curing test pieces with the average strength value of the standard curing test pieces measured in 28 days; marking points determined by the accumulated temperature, the accumulated humidity and the average value of the strength of the natural maintenance test piece measured in the same day in a three-dimensional coordinate system;
when the difference value between the average value of the strength of the natural maintenance test piece and the average value of the strength of the standard maintenance test piece is within the allowable error range, judging that the strength of the natural maintenance test piece is equivalent to the strength of the standard maintenance test piece, and taking the accumulated temperature value and humidity value as equivalent conditions of the strength of the structural entity and the strength of the standard maintenance test piece;
when the structure is applied, the accumulated temperature and the accumulated humidity for maintaining the structure entity need to meet the requirement of equivalent conditions at the same time.
2. The method for determining the strength curing age of structural concrete according to claim 1, wherein:
and respectively obtaining the equivalent conditions in spring and autumn, summer and winter, and confirming the accumulated temperature and accumulated humidity requirements of the maintenance of the structural entity by using the corresponding equivalent conditions in corresponding seasons.
3. The method for determining the strength curing age of structural concrete according to claim 1, wherein:
and N takes a value of 5-10.
4. The structural concrete strength curing age determining method according to claim 3, wherein:
and N takes a value of 5.
5. The method for determining the strength curing age of structural concrete according to claim 1, wherein:
and connecting points determined by the accumulated temperature, the accumulated humidity and the average value of the strength of the natural maintenance test piece measured in the same day into a broken line or fitting the broken line into a spline curve.
6. The method for determining the strength curing age of structural concrete according to claim 5, wherein:
the three-dimensional coordinate system is a space rectangular coordinate system, wherein two coordinate axes of the bottom surface are respectively a temperature accumulated value coordinate and a humidity accumulated value coordinate, and the vertical coordinate is a strength value coordinate.
7. The method for determining the strength curing age of structural concrete according to claim 1, wherein:
the test pieces are 1000 groups in total and are prepared by mixing, stirring and mixing medium sand, broken stone, cement, polycarboxylic acid additive and fly ash and then pouring.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114608962A (en) * | 2022-05-12 | 2022-06-10 | 四川省公路规划勘察设计研究院有限公司 | Uniaxial compression resistance tester |
| CN117557217A (en) * | 2023-11-13 | 2024-02-13 | 北京梦诚科技有限公司 | Method for metering and paying inventory engineering quantity |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5522926A (en) * | 1993-07-01 | 1996-06-04 | Bouygues | Method and a composition for preparing concrete elements having remarkable compressive strength and fracture energy, and elements obtained thereby |
| JP2006071575A (en) * | 2004-09-06 | 2006-03-16 | Taiheiyo Cement Corp | Management method for concrete and embedded-type rfid module |
| US20110163892A1 (en) * | 2010-01-07 | 2011-07-07 | Emilcott Associates, Inc. | System and method for mobile environmental measurements and displays |
| JP2011220093A (en) * | 2010-03-23 | 2011-11-04 | Mitani Sekisan Co Ltd | Method for curing unconsolidated sample in pile hole foot protection part and curing container |
| CN104020046A (en) * | 2014-06-04 | 2014-09-03 | 王卫仑 | Method for estimating compressive strength of concrete in early stage |
| CN204229630U (en) * | 2014-12-05 | 2015-03-25 | 河南省产品质量监督检验院 | A kind of concrete curing supervisory system |
| JP2015119646A (en) * | 2013-12-20 | 2015-07-02 | 大日本印刷株式会社 | Pest occurrence estimation device and program |
| CN205192538U (en) * | 2015-12-12 | 2016-04-27 | 陕西省建筑科学研究院 | Concrete equivalence maintenance monitoring devices in length of time |
| CN110631904A (en) * | 2019-08-06 | 2019-12-31 | 深圳市市政工程总公司 | Water stability testing method for building waste mixture with stable inorganic binder |
| US20200182812A1 (en) * | 2017-08-15 | 2020-06-11 | Sensohive Technologies Aps | Method and system for prediction of concrete maturity |
| CN111307588A (en) * | 2020-02-28 | 2020-06-19 | 中铁六局集团有限公司交通工程分公司 | Method for rapidly measuring compression strength ratio of ground limestone powder |
| CN111648355A (en) * | 2020-05-28 | 2020-09-11 | 中国五冶集团有限公司 | Method for improving strength of cement mixing pile of high-rise building with sand-rich geology |
-
2020
- 2020-09-23 CN CN202011006453.7A patent/CN112067401B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5522926A (en) * | 1993-07-01 | 1996-06-04 | Bouygues | Method and a composition for preparing concrete elements having remarkable compressive strength and fracture energy, and elements obtained thereby |
| JP2006071575A (en) * | 2004-09-06 | 2006-03-16 | Taiheiyo Cement Corp | Management method for concrete and embedded-type rfid module |
| US20110163892A1 (en) * | 2010-01-07 | 2011-07-07 | Emilcott Associates, Inc. | System and method for mobile environmental measurements and displays |
| JP2011220093A (en) * | 2010-03-23 | 2011-11-04 | Mitani Sekisan Co Ltd | Method for curing unconsolidated sample in pile hole foot protection part and curing container |
| JP2015119646A (en) * | 2013-12-20 | 2015-07-02 | 大日本印刷株式会社 | Pest occurrence estimation device and program |
| CN104020046A (en) * | 2014-06-04 | 2014-09-03 | 王卫仑 | Method for estimating compressive strength of concrete in early stage |
| CN204229630U (en) * | 2014-12-05 | 2015-03-25 | 河南省产品质量监督检验院 | A kind of concrete curing supervisory system |
| CN205192538U (en) * | 2015-12-12 | 2016-04-27 | 陕西省建筑科学研究院 | Concrete equivalence maintenance monitoring devices in length of time |
| US20200182812A1 (en) * | 2017-08-15 | 2020-06-11 | Sensohive Technologies Aps | Method and system for prediction of concrete maturity |
| CN110631904A (en) * | 2019-08-06 | 2019-12-31 | 深圳市市政工程总公司 | Water stability testing method for building waste mixture with stable inorganic binder |
| CN111307588A (en) * | 2020-02-28 | 2020-06-19 | 中铁六局集团有限公司交通工程分公司 | Method for rapidly measuring compression strength ratio of ground limestone powder |
| CN111648355A (en) * | 2020-05-28 | 2020-09-11 | 中国五冶集团有限公司 | Method for improving strength of cement mixing pile of high-rise building with sand-rich geology |
Non-Patent Citations (10)
| Title |
|---|
| STARTSEV VO 等: "Effect of outdoor exposure on the moisture diffusion and mechanical properties of epoxy polymers" * |
| WU CML 等: "Degradation of flip-chip-on-glass interconnection with ACF under high humidity and thermal aging" * |
| 中国建筑科学研究院: "10 混凝土结构子部分工程验收" * |
| 姚黎红: "浅析同条件养护试件留置、养护与评定" * |
| 张阳: "混凝土等效龄期监测***设计及应用" * |
| 徐晓滨: "秋冬季节混凝土等效养护龄期的确定" * |
| 杜仲 等: "浅谈屋顶绿化的植物选择与施工" * |
| 蒋鸿: "混凝土养护过程中温湿度的测定分析" * |
| 袁铭 等: "苏州虎丘塔的变形监测与保护" * |
| 覃祥涛: "对结构实体同条件养护试件相关问题的分析" * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114608962A (en) * | 2022-05-12 | 2022-06-10 | 四川省公路规划勘察设计研究院有限公司 | Uniaxial compression resistance tester |
| CN114608962B (en) * | 2022-05-12 | 2022-08-16 | 四川省公路规划勘察设计研究院有限公司 | Uniaxial compression resistance tester |
| CN117557217A (en) * | 2023-11-13 | 2024-02-13 | 北京梦诚科技有限公司 | Method for metering and paying inventory engineering quantity |
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