CN111521502A - Method for judging concrete homogeneity - Google Patents
Method for judging concrete homogeneity Download PDFInfo
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- CN111521502A CN111521502A CN202010332244.5A CN202010332244A CN111521502A CN 111521502 A CN111521502 A CN 111521502A CN 202010332244 A CN202010332244 A CN 202010332244A CN 111521502 A CN111521502 A CN 111521502A
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- concrete
- homogeneity
- strength
- rebound
- core
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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
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/52—Investigating hardness or rebound hardness by measuring extent of rebound of a striking body
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; ceramics; glass; bricks
- G01N33/383—Concrete, cement
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
Abstract
The invention provides a method for judging concrete homogeneity, which comprises simulation tests on the aspects of practicability, quality reliability, concrete homogeneity and the like of concrete mixing ratio, adopts simulation construction, member pouring, simulated environment maintenance, a rebound method, core sample strength measurement and the like, combines the reality and the simulated reality, reflects the concrete homogeneity more truly, judges whether the concrete quality can be guaranteed or not in a foreseeable manner before the concrete is produced, and reduces construction risk and enterprise risk. The invention belongs to the field of concrete test research.
Description
Technical Field
The invention relates to a method for judging concrete homogeneity, and belongs to the field of concrete test research.
Background
At present, concrete is the largest building material in China, a plurality of quality problems occur in engineering construction, the main reason for the occurrence of the quality problems is that a plurality of engineering technicians pay little attention to the quality of the concrete, the concrete is considered to be simple cement, sand, gravel and water to be stirred, and under the conditions of intense market competition and increasingly tense raw material resources, various quality problems still occur at times and lack of basic quality control; the concrete quality judgment lacks a certain predictability and an actual and intuitive detection method, and the current concrete market is only dealt with by touching the heart state of the stone crossing the river through experience judgment, so that the quality conditions of different vertical strengths of columns, wall honeycomb pitted surface and the like occur.
Disclosure of Invention
The invention provides a method for judging concrete homogeneity, which aims to solve the problems of practicability, quality reliability, concrete homogeneity and the like of concrete production enterprises at present and indirectly reduce the occurrence rate of quality accidents for the enterprises.
In order to solve the above problems, a concrete homogeneity determination method is proposed, which comprises the following specific steps:
the method comprises the following steps: manufacturing a concrete member according to relevant concrete construction specifications;
step two: after the age of the concrete member reaches 7 days, a cutting machine and a grinding machine are used for transversely and longitudinally cutting two mutually perpendicular grooves with the width of 100mm and the depth of 50mm in the middle of the concrete member, and the visual judgment of the vertical grooving observation is completed;
step three: when the age of the concrete member reaches one month, two months, three months, four months, five months and six months, coring one week before the corresponding period, carrying out comparison judgment on the multi-part rebound value, strength of the multi-part multi-size core sample, and comparison judgment on the standard test block, the rebound value and the strength of the core sample on the same day.
In the method, the vertical grooving is visually judged by observing, a cutting machine and a grinding machine are used for transversely and longitudinally cutting two mutually vertical grooves with the width of 100mm and the depth of 50mm in the middle of the concrete member, and the homogeneity of the aggregate distribution is judged by observing the aggregate particle distribution, the coarse particles, the edge distance of the member and the mutual distribution distance in the grooving from top to bottom and from left to right;
in the method, the multi-part rebound values are compared and judged, the rebound values of a plurality of areas are recorded by adopting a rebound tester specified by local or national relevant standards, the areas are divided into an upper area, a middle area and a lower area, the rebound strength value of each area is compared, and the homogeneity of the concrete is judged through the difference value;
in the method, the strength of multi-position and multi-size core samples is compared and judged, coring and sample preparation are respectively completed in a plurality of areas, tests are carried out according to age, the strength of the core samples with the same size in different areas is compared, the strength of the core samples with different sizes in the same area is compared, and the homogeneity of the concrete is judged according to corresponding difference values;
in the method, the size of the concrete member is 2000mm multiplied by 1500mm multiplied by 600mm, the strength of a multi-position and multi-size core sample is compared and judged, and the core size is as follows: the standard cubic test piece has two specifications of 150mm multiplied by 150mm and 100mm multiplied by 100mm, the cylindrical test piece has the size of 100mm in diameter, 75mm in diameter and 1:1 in height-diameter ratio;
according to the method, when the standard test block is compared and judged with the rebound value and the core sample strength, and the multi-position rebound value comparison and judgment and the multi-position multi-size core sample strength comparison and judgment are carried out, the standard test block is subjected to a compression test to obtain the strength, the core sample strengths with different sizes and the rebound strengths are compared to obtain a difference value, and the rule is summarized to be used for judging the strength of the cast concrete through the standard test block strength in a later-stage test room.
Compared with the prior art, the concrete test wall body member manufactured by using 1:1 simulation pumping construction and natural maintenance is closer to the manufacturing and maintenance of an actual building member, more real data is obtained, whether the strength grade, the construction performance, the physical performance, the durability and other aspects of the concrete meet the requirements or not can be judged at the concrete design stage by means of space imagination or experience judgment, the concrete quality is improved to the maximum extent, and the enterprise risk is reduced.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below, and it should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.
Examples
The present embodiment provides a method for determining homogeneity of concrete, which includes the following steps:
the method comprises the following steps: manufacturing a concrete member according to relevant concrete construction specifications, wherein the size of the concrete member is 2000mm multiplied by 1500mm multiplied by 600 mm;
step two: after the age of the concrete member reaches 7 days, a cutting machine and a grinding machine are used for transversely and longitudinally cutting two mutually perpendicular grooves with the width of 100mm and the depth of 50mm in the middle of the concrete member, and the visual judgment of the vertical grooving observation is completed;
step three: when the age of the concrete member reaches one month, two months, three months, four months, five months and six months, coring one week before the corresponding period, carrying out comparison judgment on the multi-part rebound value, strength of the multi-part multi-size core sample, and comparison judgment on the standard test block, the rebound value and the strength of the core sample on the same day.
The vertical grooving is observed and visually judged, a cutting machine and a grinding machine are used for transversely and longitudinally cutting two mutually vertical grooves which are 100mm wide and 50mm deep in the middle of the concrete member, and the homogeneity of aggregate distribution is judged by observing the distribution of aggregate particles from top to bottom in the grooving from left to right, the distance between coarse particles and the edge of the member and the distribution distance between the coarse particles and each other;
the method comprises the following steps of comparing and judging springback values of multiple parts, recording the springback values of multiple areas by using a rebound tester specified by local or national relevant standards, dividing the areas into an upper area, a middle area and a lower area, comparing the springback strength value of each area, and judging the homogeneity of concrete according to the difference value;
many sizes of many positions core appearance intensity contrast is judged, divides a plurality of regions to accomplish respectively to get core system appearance, tests according to the age, and the core appearance intensity of the same size of different regions of contrast contrasts, and the core appearance intensity of the same different sizes of region of contrast judges concrete homogeneity through the difference that corresponds, and appearance core size is as follows: the standard cubic test piece has two specifications of 150mm multiplied by 150mm and 100mm multiplied by 100mm, the cylindrical test piece has the size of 100mm in diameter, 75mm in diameter and 1:1 in height-diameter ratio;
standard test block and resilience value, core appearance intensity contrast are judged, and when many positions resilience value contrast was judged and many sizes of many positions core appearance intensity contrast was judged gone on, carry out compression test with standard test block simultaneously, reach intensity, through contrasting different size core appearance intensity, resilience strength, reach the difference, summarize the law to supply the later stage laboratory to judge concreting intensity through standard test block intensity.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A concrete homogeneity determination method is characterized by comprising the following specific steps:
the method comprises the following steps: manufacturing a concrete member according to relevant concrete construction specifications;
step two: after the age of the concrete member reaches 7 days, a cutting machine and a grinding machine are used for transversely and longitudinally cutting two mutually perpendicular grooves with the width of 100mm and the depth of 50mm in the middle of the concrete member, and the visual judgment of the vertical grooving observation is completed;
step three: when the age of the concrete member reaches one month, two months, three months, four months, five months and six months, coring one week before the corresponding period, carrying out comparison judgment on the multi-part rebound value, strength of the multi-part multi-size core sample, and comparison judgment on the standard test block, the rebound value and the strength of the core sample on the same day.
2. The method for determining homogeneity of concrete according to claim 1, wherein: and (3) observing and visually judging the vertical grooving, namely, transversely and longitudinally cutting two mutually perpendicular grooves with the width of 100mm and the depth of 50mm in the middle of the concrete member by using a cutting machine and a grinding machine, and judging the homogeneity of aggregate distribution by observing the distribution of aggregate particles from top to bottom and from left to right in the grooving, the distance between coarse particles and the edge of the member and the distribution distance between the coarse particles and each other.
3. The method for determining homogeneity of concrete according to claim 1, wherein: and comparing and judging the rebound values of multiple parts, finishing the record of the rebound values of multiple areas by adopting a rebound instrument specified by local or national relevant standards, dividing the rebound values into an upper area, a middle area and a lower area, comparing the rebound strength value of each area, and judging the homogeneity of the concrete through a difference value.
4. The method for determining homogeneity of concrete according to claim 1, wherein: the strength comparison and judgment of the multi-position and multi-size core samples are divided into a plurality of areas to finish coring and sample preparation respectively, tests are carried out according to ages, the strength of the core samples in the same size in different areas is compared, the strength of the core samples in the same area in different sizes is compared, and the homogeneity of the concrete is judged through corresponding difference values.
5. The method for determining homogeneity of concrete according to claim 1 or 4, wherein: the concrete member has the size of 2000mm multiplied by 1500mm multiplied by 600mm, the strength comparison judgment of multi-position and multi-size core samples has the following core sizes: the standard cubic test piece has two specifications of 150mm multiplied by 150mm and 100mm multiplied by 100mm, and the cylindrical test piece has two specifications of 100mm in diameter, 75mm in diameter and 1:1 in height-diameter ratio.
6. The method for determining homogeneity of concrete according to claim 1, wherein: standard test block and resilience value, core appearance intensity contrast are judged, and when many positions resilience value contrast was judged and many sizes of many positions core appearance intensity contrast was judged gone on, carry out compression test with standard test block simultaneously, reach intensity, through contrasting different size core appearance intensity, resilience strength, reach the difference, summarize the law to supply the later stage laboratory to judge concreting intensity through standard test block intensity.
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| CN202010332244.5A CN111521502B (en) | 2020-04-24 | 2020-04-24 | Method for judging homogeneity of concrete |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112147228A (en) * | 2020-09-28 | 2020-12-29 | 廊坊市阳光建设工程质量检测有限公司 | Method for establishing strength measurement curve for detecting concrete strength by using rebound ultrasonic angle measurement comprehensive method |
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| GB1244490A (en) * | 1967-09-21 | 1971-09-02 | Fred Ward Allen Jr | Method for testing compressive strength |
| CN101303329A (en) * | 2008-06-13 | 2008-11-12 | 东南大学 | Integrated strength testing method based on neural network technology |
| CN102662045A (en) * | 2012-05-05 | 2012-09-12 | 扬州大学 | Method for testing uniformity of light-weight aggregate concrete |
| CN108956389A (en) * | 2018-05-28 | 2018-12-07 | 中国铁道科学研究院铁道建筑研究所 | A kind of homogeneity of concrete test method based on photoreception granule |
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2020
- 2020-04-24 CN CN202010332244.5A patent/CN111521502B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1244490A (en) * | 1967-09-21 | 1971-09-02 | Fred Ward Allen Jr | Method for testing compressive strength |
| CN101303329A (en) * | 2008-06-13 | 2008-11-12 | 东南大学 | Integrated strength testing method based on neural network technology |
| CN102662045A (en) * | 2012-05-05 | 2012-09-12 | 扬州大学 | Method for testing uniformity of light-weight aggregate concrete |
| CN108956389A (en) * | 2018-05-28 | 2018-12-07 | 中国铁道科学研究院铁道建筑研究所 | A kind of homogeneity of concrete test method based on photoreception granule |
Non-Patent Citations (4)
| Title |
|---|
| ANGELO MASI 等: "Criteria for identifying concrete homogeneous areas for the estimation of in-situ strength in RC buildings", 《CONSTRUCTION AND BUILDING MATERIALS》 * |
| 尚静媛等: "混凝土结构实体强度检测方法实验对比分析", 《天津城市建设学院学报》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112147228A (en) * | 2020-09-28 | 2020-12-29 | 廊坊市阳光建设工程质量检测有限公司 | Method for establishing strength measurement curve for detecting concrete strength by using rebound ultrasonic angle measurement comprehensive method |
| CN112147228B (en) * | 2020-09-28 | 2023-03-10 | 廊坊市阳光建设工程质量检测有限公司 | Method for establishing strength measurement curve for detecting concrete strength by using rebound ultrasonic angle measurement comprehensive method |
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| CN111521502B (en) | 2023-06-13 |
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