CN102539262A - High strength concrete resiliometer and use method thereof - Google Patents
High strength concrete resiliometer and use method thereof Download PDFInfo
- Publication number
- CN102539262A CN102539262A CN2011104362440A CN201110436244A CN102539262A CN 102539262 A CN102539262 A CN 102539262A CN 2011104362440 A CN2011104362440 A CN 2011104362440A CN 201110436244 A CN201110436244 A CN 201110436244A CN 102539262 A CN102539262 A CN 102539262A
- Authority
- CN
- China
- Prior art keywords
- elastic
- concrete
- reisilometer
- strength
- elastic stem
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a high strength concrete resiliometer. Striking rods [4] are inserted into a central guide rod [2] from the front end. The striking rods are same in length and diameter but the radiuses of curvature of striking end surfaces are different. The invention further provides a use method of the high strength concrete resiliometer. The method comprises the following steps: at first, pre-judging the strength range of measured concrete; then selecting the striking rods with radiuses of curvature of striking end surfaces corresponding to the range and installing the striking rods on the resiliometer; then measuring the rebound value according to measurement rules; and finally calculating the strength of concrete or surface hardness estimate value through a rebound curve corresponding to the striking rods and characteristics of the measured concrete. Compared with the prior art, in the invention, a medium resiliometer device is provided with a group of striking rods with various radiuses of curvature of striking end surfaces and special strength measuring curves of corresponding striking rod of specifications are created to easily measure the surface hardness and compression strength of high strength concrete by the medium resiliometer and obtain the measurement result smaller than the allowable error.
Description
Technical field
What the present invention relates to is a kind of high-strength concrete reisilometer and method of application thereof, belongs in the physics with measuring bump object extent of rebound test solid material compressive strength or skin hardness technical field.
Background technology
High-strength concrete (high strength concrete) has different definition in different documents; (JGJ 55-2000) is meant the concrete of compressive strength more than 60MPa like " design of common concrete proportioning rules "; " flyash concrete application technology standard " (GBJ 146-1990) is meant the concrete of compressive strength more than 40MPa, and " highway bridge and culvert construction technique normalizing " (JTJ 041-2000) then is meant the concrete of compressive strength at 50～80MPa.The present invention is meant the concrete of compressive strength more than 60MPa.
Reisilometer is made up of housing, centre pilot, elastic hammer, elastic tension spring, elastic stem, firing lock, pointer and guide rod thereof and reading device.Reisilometer stretching elastic tension spring drives elastic hammer and obtains the surface of impact kinetic energy via elastic stem bump solid material; The bounce that the solid material surface that is impacted produces makes elastic hammer produce the resilience campaign; With the percentage value of the ratio of the ratio of the rebound stroke of elastic hammer and attack stroke or elastic hammer rebound velocity and stroke speed as rebound value, that is:
In the formula: r is the rebound stroke of elastic hammer, and L is the impact stroke of elastic hammer.Or:
In the formula: v
rBe the rebound velocity of elastic hammer, v
0Stroke speed for elastic hammer.
Reisilometer is through obtaining the skin hardness that rebound value detects solid material.Because the skin hardness of material with its compressive strength is corresponding correlativity usually, so reisilometer also is usually used in detecting the compressive strength of solid material.It is the compressive strength that is used to detect solid concrete that present reisilometer is used the most widely.
Rebound value is relevant with the skin hardness characteristic and the impact strength of tested solid material.The impact strength of reisilometer depends on effective impact area of the bump kinetic energy and the elastic stem bump end face of reisilometer; Bump kinetic energy is determined by the length that the rigidity of the elastic tension spring of reisilometer is stretched with it; Effectively impact area is relevant with the radius-of-curvature of bump end face by the diameter of reisilometer elastic stem, clashes into end face and be sphere shape.For the reisilometer of same model, the diameter of its bump kinetic energy, elastic stem is identical with the radius-of-curvature of bump end face.Also promptly, the impact strength of same model reisilometer is identical for tested solid material, and the measured rebound value of same model reisilometer is identical for the material that similar face hardness is arranged.
For the reisilometer of same model, the skin hardness of rebound value and certain measured material or the conversion relation of compressive strength can obtain through statistical method through test figure in advance, and this relation is called rebound curve.The skin hardness or the compressive strength that is to say reisilometer mensuration material check in accordingly result from rebound curve again through recording rebound value earlier.Rebound curve is relevant with the reisilometer characteristic with measured material character, promptly before measuring concrete surface hardness or compressive strength, will set up rebound curve for the reisilometer of every kind of specification and the material of every specific character.The preparation method of rebound curve confirmed by the technical regulation in relevant art field usually, as People's Republic of China's industry standard " rebound method detects concrete crushing strength technical regulation " (JGJ/T23-2011) in appendix " the special-purpose formulating method of surveying strong curve " stipulated that rebound method measures the formulating method that strong curve is surveyed in the resilience of concrete crushing strength.
Usually the skin hardness or the relation between compressive strength and the rebound value (being rebound curve) of material are forward power function or exponential function relation, and the strong curve equation of survey of the pump concrete that (JGJ/T23-2011) provides like " rebound method detects concrete crushing strength technical regulation " is:
f＝0.034488R
1.940010
(-0.0173d)
In the formula: R is a rebound value, and f is the compressive strength of the tested pump concrete of inferring; D is the carbonation depth on detected concrete surface, is an independent parameter that is used to revise the presumed value of concrete crushing strength.
Also promptly: rebound value is big more, and its pairing compressive strength of rebound value variable quantity or skin hardness variable quantity are more responsive.Therefore, when rebound value surpasses certain limit, make the error of compressive strength or the skin hardness of the testee that obtains of calculating reach the critical point of permissible error, then this intensity or hardness are the maximum detected intensity or the hardness of reisilometer.The intensity or the hardness of measured material are too small simultaneously, with rebound value can't be reached in the range ability of necessity, have then exceeded the minimum detection intensity of reisilometer.That is to say,, might not detect the interval that a certain material is contained its all surfaces hardness or compressive strength, only can detect skin hardness or compressive strength in its certain limit in other words for a kind of reisilometer of model.The interval of the concrete crushing strength value of the strong curve of survey of the pump concrete that (JGJ/T23-2011) provides like " rebound method detect concrete crushing strength technical regulation " is: 20MPa～60MPa.
In the past because common building seldom uses compressive strength to be higher than the 60MPa strong concrete; So the determination of resilience concrete crushing strength only uses medium-sized reisilometer just enough, and uses other modes such as adopted core boring sampling of high-strength concrete to detect its solid strength individually.Usually be that the reisilometer of 2.207J is called common reisilometer or medium-sized reisilometer with impact energy in the industry, impact energy less than being called of 2.207J light-duty reisilometer, greater than heavy reisilometer of being called of 2.207J.The then useful impact energys such as foundation structure of some dams, bridge and important building are that the heavy reisilometer of 9.8J carries out Non-Destructive Testing.Along with the raising that construction quality is required and the improvement of material conditions; In recent years compressive strength be higher than the 60MPa high-strength concrete widespread usage in kind building; And rebound method is the lossless detection method of the detection solid concrete compressive strength of simple and fast, has also received attention so rebound method detects high-strength concrete compressive strength.But in the past impact energy be the heavy reisilometer of 9.8J because its volume is big, Heavy Weight, the concrete crushing strength that is not suitable for most of buildingss detects.Detect the above high-strength concrete of 60MPa for solving rebound method; Produced the reisilometer of many detection high-strength concrete compressive strength, the impact energy that proposes like Chinese utility model patent ZL00247527.8 is that the impact energy that the reisilometer of 5.5J, Chinese utility model patent ZL98201939.4 propose is the reisilometer of 4.5J.These reisilometers are compared with existing medium-sized reisilometer, all mainly be through increasing elastic hammer in the reisilometer quality, improve impact energy that elastic tension spring rigidity and level of stretch improve reisilometer and realize the detection of high-strength concrete.Compare with existing medium-sized reisilometer, this type reisilometer has increased operator's work load, and the original rebound method of having weakened detects agile, the intrinsic advantage easily of concrete crushing strength.This be because; To the reinforcement of elastic hammer, elastic tension spring, elastic hammer in the reisilometer and the synchronous reinforcement that brings thus to other parts; Not only increased the quality of reisilometer, also made the operator time need pay the elastic force that more muscle power overcomes elastic tension spring and reach necessary tensile elongation in operation.Also improved simultaneously the stroke speed of elastic hammer when measuring, thereby the mission life that increases reisilometer of each movable parts wear causes adverse effect thereupon.
Summary of the invention
To above-mentioned deficiency; Technical matters to be solved by this invention is exactly to avoid reaching the technological approaches of raising reisilometer to the accuracy of high-strength concrete skin hardness or compressive strength measurement through increasing impact energy; On the basis that keeps existing medium-sized resiliometer impact energy value, propose a kind of high-strength concrete reisilometer, and propose the method for application of this reisilometer.
High-strength concrete reisilometer provided by the invention has elastic hammer, elastic tension spring, elastic stem, centre pilot, wherein elastic stem from the front end sleeve on centre pilot; The elastic hammer quality is 370g, and elastic tension spring rigidity is 785N/m, and the elastic tension spring tensile elongation is 75mm; The elastic stem diameter is 15mm; The nominal impact energy is 2.207J, and said elastic stem is equipped with a plurality of, and each elastic stem length is identical with diameter and the radius-of-curvature bump end face is different.
High-strength concrete reisilometer provided by the invention is the basis with existing medium-sized reisilometer, disposed the elastic stem of the radius-of-curvature of a plurality of different bump end faces, and elastic stem is through the relative reisilometer centre pilot of plug mode removably.Compared with prior art; The present invention does not change any structure of existing medium-sized reisilometer; The elastic stem of just selecting the radius-of-curvature of different bump end faces according to the different surface hardness or the compressive strength of tested solid material just can obtain the mensuration result less than permissible error.
Can know from the relation principle of stressed generation elastic deformation of solid material and plastic yield, same measured object clashed into that the elastic deformation amount of measured object is negative correlation with the effective impact area that is impacted with identical impact energy; Also promptly: for uniform impingement kinetic energy (impact kinetic energy of the reisilometer of same model is identical), impact area is more little, and springback capacity is more little.Therefore, the radius-of-curvature that reduces the elastic stem bump end face of reisilometer is equivalent to reduce effective impact area, also can reduce for the resulting rebound value of identical measured object, and vice versa.Experiment is proof also, and the employing impact energy is that the medium-sized reisilometer of 2.207J clashes into the end face radius-of-curvature through reducing elastic stem, and radius-of-curvature is more little, and the pairing concrete crushing strength of identical rebound value is high more for recording.That is to say that high-strength concrete reisilometer provided by the invention can be broken through the measurement range of medium-sized reisilometer 10MPa～60MPa through changing elastic stem.The present invention makes the material for similar face hardness or compressive strength obtain lower rebound value through reducing the method for elastic stem bump end face radius-of-curvature, thereby under equal accuracy of detection (allowing to detect error), has improved the sensing range of material surface hardness.Detect concrete crushing strength for rebound method, under equal accuracy of detection (allowing to detect error), enlarged and improved the sensing range of concrete crushing strength, can be with of the detection of medium-sized reisilometer as high-strength concrete compressive strength.
The bump end face radius-of-curvature of said each elastic stem is in 5mm～35mm scope; As be respectively 5mm, 7.5mm, 10mm, 15mm, 25mm, six specifications of 35mm, respectively to be applied to detect concrete crushing strength in 10MPa～130MPa six differences but the interval of common factor is arranged.
When wherein the bump end face radius-of-curvature of elastic stem was less than 7.5mm, the bump end face was connected with the elastic stem cylinder through truncated cone-shaped, with the Stress Transfer of even elastic stem link position.
The method of application of high-strength concrete reisilometer provided by the invention; Concrete strength range is surveyed in elder generation's anticipation; Select the bump end face radius-of-curvature elastic stem corresponding to be installed on the reisilometer again with this scope; Record rebound value by measuring rules again, at last through conversing detected concrete intensity with this elastic stem and the corresponding rebound curve of detected concrete characteristic.
The method of application of high-strength concrete reisilometer provided by the invention, interval with realizing changing its range through the bump end face radius-of-curvature that changes elastic stem with medium-sized reisilometer to the rebound curve that elastic stem obtained (also claiming to survey strong curve) of different bump end face radius-of-curvature.Compared with prior art, the present invention only need survey strong curve for medium-sized reisilometer elastic stem that is equipped with one group of multiple bump end face radius-of-curvature and the special use of setting up wherein corresponding each specification elastic stem and just can easily medium-sized reisilometer be migrated and do the skin hardness of high-strength concrete and the mensuration of compressive strength.
The mensuration of said rebound curve is to carry out according to the determined method of the technical regulation of corresponding professional domain.As for detecting concrete crushing strength, with People's Republic of China's industry standard " rebound method detects concrete crushing strength technical regulation " (JGJ/T23-2011) in the method for appendix " the special-purpose formulating method of surveying strong curve " be respectively the elastic stem of different size radius-of-curvature and the concrete of different qualities is formulated the strong curve of special-purpose survey.Skin hardness for other materials detects, and then can be undertaken by the corresponding set rebound curve method for building up of this kind material.
The method of application of high-strength concrete reisilometer provided by the invention; For digital reisilometer; Each pairing rebound curve of concrete that clashes into end face radius-of-curvature elastic stem and different qualities is stored in the computer system, and the control interface is provided with SS and makes instrument can extract corresponding rebound curve data according to the concrete of selected bump end face radius-of-curvature and different qualities to supply follow-up computing.Be that said rebound curve is stored in the computer system; Before measuring rebound value, be adjusted to the selected elastic stem position and the characteristic location of detected concrete with the SS on the control interface earlier, record behind the rebound value and to extract corresponding rebound curve data by instrument according to selected elastic stem and concrete property and carry out computing
Description of drawings
Fig. 1 is reisilometer partial sectional view of the present invention and appended elastic stem cut-open view, among the figure: 1-housing, 2-centre pilot, 3-elastic tension spring, 4-elastic stem, 41,42,43,44, the other elastic stem of configuration of 45-.
Embodiment
1, a kind of high-strength concrete reisilometer is as shown in Figure 1, is made up of an existing medium-sized reisilometer and six elastic stems that disposed.Elastic stem 4 inserts and is enclosed within on the centre pilot 2 from housing 1 front end, and elastic tension spring 3 is connected between housing front end and the elastic hammer, and elastic hammer is enclosed within on the centre pilot and is positioned at the rear end of elastic stem.Be pressed into elastic stem during work; Through centre pilot with elastic hammer to the pusher and the elastic tension spring that stretches;, extension spring triggers firing lock when being stretched to definite tensile elongation, elastic hammer shock elastic stem rear end face and impact is delivered to the measured material surface through the bump end face forward under the elastic tension spring effect.The be impacted surface of material produces bounce to elastic stem, makes elastic hammer produce resilience campaign and drive the pointer slip through elastic stem transfer function to elastic hammer to indicate rebound value.Six elastic stem front end bump end face radius-of-curvature that disposed are respectively 5mm, 7.5mm, 10mm, 15mm, 25mm, six specifications of 35mm, can be used for the concrete detection of compressive strength at 10MPa～130MPa.The elastic stem 4 that wherein clashes into the end face radius-of-curvature and be 25mm is medium-sized reisilometer first wife elastic stems, and all the other five is that the elastic stem 41,42,43,44,45 of configuration is in addition selected for use by the concrete compressive strength of survey interval.Wherein clashing into the end face radius-of-curvature is the elastic stem 41 of 5mm, and its bump end face is connected with the elastic stem cylinder through truncated cone-shaped.
2, the method for application of above-mentioned high-strength concrete reisilometer; After the bump end face radius-of-curvature of the elastic stem of confirming to be disposed, draw the concrete special-purpose rebound curve of the corresponding various characteristics of each elastic stem according to appendix " the special-purpose formulating method of surveying strong curve " in People's Republic of China's industry standard " rebound method detects concrete crushing strength technical regulation (JGJ/T23-2011) ".This rebound curve need only be set up once just can be used as the technical information use with product.When measuring; In the design strength grade of prevision detected concrete or through after attempting the measured rebound value of different elastic stems and differentiating strength grade of concrete to be detected; Earlier confirm range ability according to concrete anticipation strength grade to be detected; By the selected elastic stem of this scope, carry out attack by the technical regulation regulation again and detect again, select corresponding rebound curve to extrapolate the compressive strength of detected concrete according to the gained rebound value at last.As need on reisilometer, change elastic stem, and the elastic stem that then before measurement, will originally be contained on the reisilometer is earlier extracted from centre pilot, and fixed elastic stem puts earlier again.
For digital reisilometer, then the strong curve of the pairing survey of each elastic stem is write reisilometer, only need in software, to select the survey strong curve corresponding to get final product during use with elastic stem.
The present invention has realized making medium-sized reisilometer to have the sensing range of high strength more or hardness.Only need provide for simple replacement of different elastic stems for difference to the detection of picture, and need not be equipped with a plurality of reisilometers, and keep medium-sized reisilometer and use light advantage.The easily worn part of reisilometer and the calibrating of reisilometer only need be got final product by a kind of specification, made things convenient for maintenance, reduced and purchased and use cost.
Claims (6)
1. a high-strength concrete reisilometer has elastic hammer, elastic tension spring, elastic stem, centre pilot, wherein elastic stem from the front end sleeve on centre pilot; The elastic hammer quality is 370g, and elastic tension spring rigidity is 785N/m, and the elastic tension spring tensile elongation is 75mm; The elastic stem diameter is 15mm; The nominal impact energy is 2.207J, and it is a plurality of to it is characterized in that said elastic stem is equipped with, and each elastic stem length is identical with diameter and the radius-of-curvature bump end face is different.
2. high-strength concrete reisilometer as claimed in claim 1, the bump end face radius-of-curvature that it is characterized in that said each elastic stem is in 5mm～35mm scope.
3. high-strength concrete reisilometer as claimed in claim 2 is characterized in that the elastic stem that is equipped with has six specifications, and their bump end face radius-of-curvature is respectively 5mm, 7.5mm, 10mm, 15mm, 25mm, 35mm.
4. like claim 1 or 2 or 3 described high-strength concrete reisilometers, when it is characterized in that bump end face radius-of-curvature when elastic stem is less than 7.5mm, the bump end face is connected with the elastic stem cylinder through truncated cone-shaped.
5. the method for application of high-strength concrete reisilometer as claimed in claim 1; It is characterized in that first anticipation surveys concrete strength range; Select the bump end face radius-of-curvature elastic stem corresponding to be installed on the reisilometer again with this scope; Record rebound value by measuring rules again, at last through conversing detected concrete intensity with this elastic stem and the corresponding rebound curve of detected concrete characteristic.
6. the method for application of high-strength concrete reisilometer as claimed in claim 1; It is characterized in that said rebound curve is stored in the computer system; Before measuring rebound value, be adjusted to the selected elastic stem position and the characteristic location of detected concrete with the SS on the control interface earlier, record behind the rebound value and to extract corresponding rebound curve data by instrument according to selected elastic stem and concrete property and carry out computing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110436244.0A CN102539262B (en) | 2011-12-23 | 2011-12-23 | High strength concrete resiliometer and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110436244.0A CN102539262B (en) | 2011-12-23 | 2011-12-23 | High strength concrete resiliometer and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102539262A true CN102539262A (en) | 2012-07-04 |
| CN102539262B CN102539262B (en) | 2014-04-09 |
Family
ID=46346699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110436244.0A Active CN102539262B (en) | 2011-12-23 | 2011-12-23 | High strength concrete resiliometer and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102539262B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251882A (en) * | 2014-09-30 | 2014-12-31 | 湖南理工学院 | Establishment method of concrete compression strength curve |
| CN104834771A (en) * | 2015-04-23 | 2015-08-12 | 东南大学 | Method for establishing strength measurement curve of concrete with high-volume mineral admixtures |
| CN106442188A (en) * | 2016-08-26 | 2017-02-22 | 四川省建筑科学研究院 | Spot measuring method of non sintering brick setting construction engineering |
| CN110987263A (en) * | 2019-11-28 | 2020-04-10 | 北京航星机器制造有限公司 | Impact overload force measuring mechanism and measuring method |
| CN111238978A (en) * | 2020-01-11 | 2020-06-05 | 广东顺水工程建设监理有限公司 | Strength detection equipment of hydraulic engineering dam body |
| CN111829910A (en) * | 2020-07-14 | 2020-10-27 | 北京建筑材料科学研究总院有限公司 | Quality evaluation method for filling leveling layer on floating ground |
| CN112213217A (en) * | 2020-10-22 | 2021-01-12 | 廊坊市阳光建设工程质量检测有限公司 | Method for establishing compression strength curve of concrete detected by rebound method |
| CN112213215A (en) * | 2020-09-02 | 2021-01-12 | 廊坊市阳光建设工程质量检测有限公司 | Method for detecting compressive strength of concrete through combined resilience |
| US10969315B2 (en) | 2017-12-12 | 2021-04-06 | Imam Abdulrahman Bin Faisal University | Combined ultrasonic pulse velocity and Schmidt Hammer rebound test for non-destructive evaluation |
| CN114264563A (en) * | 2021-12-27 | 2022-04-01 | 乐陵市回弹仪厂 | 3.503 Joule concrete resiliometer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5176026A (en) * | 1989-12-07 | 1993-01-05 | Proceq S.A. | Apparatus for measuring the surface hardness of building materials |
| CN2781355Y (en) * | 2005-03-29 | 2006-05-17 | 张荣成 | High strength concrete resiliometer |
| JP2006349566A (en) * | 2005-06-17 | 2006-12-28 | Nodakku Kk | Test hammer for underwater evaluation and concrete compression strength evaluation method |
| CN101802585A (en) * | 2007-09-20 | 2010-08-11 | 马尔科·布兰德斯蒂尼 | Method and apparatus for the non-destructive measurement of the compressive strength of a solid |
| CN202548023U (en) * | 2011-12-26 | 2012-11-21 | 舟山市博远科技开发有限公司 | High-strength concrete rebound hammer |
-
2011
- 2011-12-23 CN CN201110436244.0A patent/CN102539262B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5176026A (en) * | 1989-12-07 | 1993-01-05 | Proceq S.A. | Apparatus for measuring the surface hardness of building materials |
| CN2781355Y (en) * | 2005-03-29 | 2006-05-17 | 张荣成 | High strength concrete resiliometer |
| JP2006349566A (en) * | 2005-06-17 | 2006-12-28 | Nodakku Kk | Test hammer for underwater evaluation and concrete compression strength evaluation method |
| CN101802585A (en) * | 2007-09-20 | 2010-08-11 | 马尔科·布兰德斯蒂尼 | Method and apparatus for the non-destructive measurement of the compressive strength of a solid |
| CN202548023U (en) * | 2011-12-26 | 2012-11-21 | 舟山市博远科技开发有限公司 | High-strength concrete rebound hammer |
Non-Patent Citations (1)
| Title |
|---|
| 朱浮声 等: "普通回弹仪在高强度混凝土强度检测中的应用", 《东北大学学报（自然科学版）》, vol. 23, no. 5, 31 May 2002 (2002-05-31), pages 474 - 476 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251882A (en) * | 2014-09-30 | 2014-12-31 | 湖南理工学院 | Establishment method of concrete compression strength curve |
| CN104834771A (en) * | 2015-04-23 | 2015-08-12 | 东南大学 | Method for establishing strength measurement curve of concrete with high-volume mineral admixtures |
| CN104834771B (en) * | 2015-04-23 | 2018-03-30 | 东南大学 | The method for building up of high content mineral admixtures concrete strength-detecting curve |
| CN106442188A (en) * | 2016-08-26 | 2017-02-22 | 四川省建筑科学研究院 | Spot measuring method of non sintering brick setting construction engineering |
| US11293845B2 (en) | 2017-12-12 | 2022-04-05 | Imam Abdulrahman Bin Faisal University | Non-destructive anchor bolt pull out load capacity testing system |
| US11662284B2 (en) | 2017-12-12 | 2023-05-30 | Imam Abdulrahman Bin Faisal University | Method for evaluating anchor bolt embedment in concrete |
| US10969315B2 (en) | 2017-12-12 | 2021-04-06 | Imam Abdulrahman Bin Faisal University | Combined ultrasonic pulse velocity and Schmidt Hammer rebound test for non-destructive evaluation |
| CN110987263A (en) * | 2019-11-28 | 2020-04-10 | 北京航星机器制造有限公司 | Impact overload force measuring mechanism and measuring method |
| CN110987263B (en) * | 2019-11-28 | 2021-12-03 | 北京航星机器制造有限公司 | Impact overload force measuring mechanism and measuring method |
| CN111238978A (en) * | 2020-01-11 | 2020-06-05 | 广东顺水工程建设监理有限公司 | Strength detection equipment of hydraulic engineering dam body |
| CN111829910A (en) * | 2020-07-14 | 2020-10-27 | 北京建筑材料科学研究总院有限公司 | Quality evaluation method for filling leveling layer on floating ground |
| CN111829910B (en) * | 2020-07-14 | 2021-11-23 | 北京建筑材料科学研究总院有限公司 | Quality evaluation method for filling leveling layer on floating ground |
| CN112213215A (en) * | 2020-09-02 | 2021-01-12 | 廊坊市阳光建设工程质量检测有限公司 | Method for detecting compressive strength of concrete through combined resilience |
| CN112213217A (en) * | 2020-10-22 | 2021-01-12 | 廊坊市阳光建设工程质量检测有限公司 | Method for establishing compression strength curve of concrete detected by rebound method |
| CN114264563A (en) * | 2021-12-27 | 2022-04-01 | 乐陵市回弹仪厂 | 3.503 Joule concrete resiliometer |
| CN114264563B (en) * | 2021-12-27 | 2024-05-03 | 乐陵市回弹仪厂 | 3.503J concrete resiliometer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102539262B (en) | 2014-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102539262B (en) | High strength concrete resiliometer and use method thereof | |
| US11662284B2 (en) | Method for evaluating anchor bolt embedment in concrete | |
| Li et al. | Analysis of impact hammer rebound to estimate rock drillability | |
| CN107130651B (en) | The detection device and its detection method of anchor pole internal force exterior measuring | |
| CN106223305B (en) | A kind of automatic dynamic driving instrument for considering energy correction and dynamic response | |
| CN108645700B (en) | Concrete resiliometer and use method thereof | |
| CN102053040B (en) | Dynamic bearing ratio detecting method and instrument | |
| CN204718904U (en) | A kind of reisilometer | |
| CN105019481A (en) | Method for testing bearing capacity of foundation pile with dynamic stage loading method | |
| CN109669424B (en) | Rock mechanical property test control system and method under complex condition | |
| CN107300432A (en) | A kind of method and apparatus for being used to realize live adaptive cable force measurement | |
| CN202548023U (en) | High-strength concrete rebound hammer | |
| Lukiantchuki et al. | Energy ratio (ER) for the standard penetration test based on measured field tests | |
| CN100485357C (en) | Method and device for measuring resiliometer impact kinetic energy | |
| CN206902781U (en) | The detection means of anchor pole internal force exterior measuring | |
| Rausche et al. | Comparison of pulse echo and transient response pile integrity test methods | |
| CN207019819U (en) | A kind of realization device of cable force measurement technology | |
| CN112098241A (en) | Energy consumption measuring system and measuring and calculating method for crushing of particulate matters | |
| CN212835546U (en) | Low strain detection foundation pile engineering simulation device | |
| CN201926598U (en) | Dynamic bearing ratio detector | |
| Paikowsky | Innovative load testing systems | |
| Basu | Mechanical characterization of granitic rocks of Hong Kong by improvedindex testing procedures with reference to weathering inducedmicrostructural changes | |
| CN112800583A (en) | Medium and high strain rate dynamic damage constitutive model suitable for hard rock and application method thereof | |
| CN113252782A (en) | Signal acquisition device and method for nondestructive testing of quality of multi-defect long anchor cable | |
| CN214121878U (en) | Sample for measuring dynamic tensile strength of rock on Hopkinson pressure bar system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |