CN101329239A - Detection method of pit sand masonry mortar compression resistance penetration method - Google Patents
Detection method of pit sand masonry mortar compression resistance penetration method Download PDFInfo
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- CN101329239A CN101329239A CNA2008103031190A CN200810303119A CN101329239A CN 101329239 A CN101329239 A CN 101329239A CN A2008103031190 A CNA2008103031190 A CN A2008103031190A CN 200810303119 A CN200810303119 A CN 200810303119A CN 101329239 A CN101329239 A CN 101329239A
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Abstract
The invention provides a detection method used for detecting the compressive strength of rock sand masonry mortar by a penetration method, comprising the detection steps as follows: measuring points are uniformly arranged on horizontal lime seams of the rock sand masonry mortars to be detected; the measuring points are grinded and levelled; the measuring points are detected exactly one by one by a penetrometer; the penetration depth measuring meter of the penetrameter measures the penetration depth reading values di' of all measuring points; the penetration depth values di of all measuring points are calculated according to the formula as follows: di=20.00-di'; according to the penetration depth average md, experience formulas are converted according to different rock sand masonry mortar compressive strengths: for cement mixed mortars: fz, e<c>=25.9223md<-1.5325>; the effective measurement range is 0.4-15.8MPa; for cement mortars: fz, e<c>=24.7105md<-1.3779>; the effective measurement range is 0.4-16MPa; for yellow sand mortars: fz, e<c>=194.9274md<-2.3769>; the effective measurement range is 0.4 to 10.3MPa; therefore, the compressive strength of the rock sand masonry mortars to be tested is converted, thus solving the technical problems that the site detection of the compressive strength of the rock sand masonry mortars has great error and the accuracy is not high.
Description
Technical field
The present invention relates to a kind of building detection method, particularly a kind of detection method of mortar compressive strength.
Background technology
Mountain sand in western China, especially be a kind of widely used building materials in Guizhou Province.But for a long time, the compressive strength of mountain sand masonry mortar does not have special detection method, uses the method that penetration method detects common compression strength of building mortar always.Though the regularity of distribution that both survey strong curve is roughly consistent, all be power function and distribute, because mountain sand and normal sands wood property is different, fine aggregate quality difference, the mortar mix ratio difference makes the compressive strength regularity of distribution of masonry mortar also completely different.; when detecting compression strength of building mortar with penetration method; same test condition is the same strength grade mortar of preparation down; the penetration resistance difference that is subjected in the penetrometer injection mortar specimen; cause the depth of penetration difference; therefore detecting the mountain sand masonry mortar with the detection method of common compression strength of building mortar must have very mistake, can not guarantee the accuracy of pit sand masonry mortar compression detection.
Summary of the invention
The invention provides a kind of detection method of pit sand masonry mortar compression resistance penetration method, solve the technical matters that the on-the-spot detection of existing pit sand masonry mortar compression error is big, accuracy is not high.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of detection method of pit sand masonry mortar compression resistance penetration method is characterized in that having following detection step:
Step 1 is evenly arranged measuring point on detected mountain sand masonry mortar masonry horizontal mortar joint;
Step 2, the place polishes flat with measuring point;
Step 3 is aimed at above-mentioned measuring point with penetrometer and is detected one by one, is obtained the depth of penetration reading value d ' of each measuring point by the depth of penetration meter of penetrometer
i
Step 4 is calculated as follows the depth of penetration value d that obtains each measuring point according to depth of penetration numerical value
i: d
i=20.00-d '
i, wherein: the depth of penetration value d of i measuring point
iBe accurate to 0.01mm, the depth of penetration meter reading value d ' of i measuring point
iBe accurate to 0.01mm;
Step 5 is rejected maximal value and minimum value in the depth of penetration value, then the depth of penetration value of remainder is calculated, and obtains depth of penetration mean value m
d
Step 6 is according to depth of penetration mean value m
d, obtain following different pit sand masonry mortar compression conversion experimental formula by the strong regression equation calculation of survey of different mountain sand mortar kinds:
The cement mixing mortar:
Validity Test scope: 0.4～15.8MPa;
Sand-cement slurry:
Validity Test scope: 0.4～16.0MPa;
The yellow ground mortar:
Validity Test scope: 0.4～10.3MPa;
In the formula: f
2, e cBe compression strength of building mortar, m
dBe masonry mortar depth of penetration mean value;
Draw the compressive strength of tested mountain sand masonry mortar according to above-mentioned experimental formula.
In the above-mentioned steps 1 between measuring point spacing be not less than 240mm, no more than 2 of every mortar joint measuring point, at least 12 of total measuring points.
Above-mentioned steps 2 when the mortar joint of masonry after polishing, when still being difficult to reach smooth,, before injection detects, read the mortar surface irregularity degree d at measuring point place with the survey of depth of penetration meter at measuring point place mark
i 0And record, and then carry out penetration test with penetrometer at the measuring point place of mark;
The concrete detection step of above-mentioned steps 3 is as follows:
I, will survey in the survey nail seat that nail inserts penetrometer, survey the nail tip outwardly, and fix and survey nail;
II, screw nut, the injection bar is outwards extracted, till hook hangs up, then nut is retreated to injection masthead end;
III, the penetrometer homalocephalus is aimed in the middle of the mortar joint, and vertically be attached to the surface of tested masonry mortar joint mortar, hold the penetrometer handle, pull trigger, will survey and follow closely in the tested mortar of injection;
IV, will survey nail puller and go out, the dust in the gaging hole be blown clean with hair-dryer;
V, depth of penetration meter homalocephalus is aimed at mortar joint, simultaneously gauge head is inserted in the gaging hole, and keep the surface of meter, from dial plate, directly read meter displayed value d ' perpendicular to tested masonry mortar joint mortar
iAnd record.
When mortar was imperfect around the mortar joint mortar inside at measuring point place exists cavity or gaging hole, this measuring point cancelled, and the alternative measuring point is mended and surveyed.
Above-mentioned steps 4 is calculated as follows the depth of penetration of measuring mortar joint mortar surface irregularity degree:
The irregularity degree reading d of the depth of penetration meter of i measuring point
i 0Be accurate to 0.01mm.
Above-mentioned steps 6 described different pit sand masonry mortar compression conversion experimental formulas obtain with the following method:
Step a, employing mountain sand and Binder Materials preparation mountain sand masonry mortar are built masonry by laying bricks or stones with the mountain sand masonry mortar;
Step b, with step a simultaneously, use with winding sand masonry mortar and make mortar specimen;
Step c, above-mentioned masonry and test block are carried out with the condition maintenance;
Steps d, carry out penetration test with penetrometer on the masonry mortar joint of step a, getting depth of penetration mean value is typical value m
dThe mm of unit is accurate to 0.01mm;
Step e, carry out compressive strength test with the mortar specimen of step b on the compressive strength test machine, the compressive strength mean value of mortar specimen is typical value f
2, units MPa is accurate to 0.1MPa;
Step f, by each the group test block f
2With corresponding one group m
dData adopt least square method to carry out the calculating that the mountain sand masonry mortar is surveyed strong regression equation, obtain different pit sand masonry mortar compression conversion experimental formulas:
The cement mixing mortar:
Validity Test scope: 0.4～15.8MPa;
Sand-cement slurry:
Validity Test scope: 0.4～16.0MPa;
The yellow ground mortar:
Validity Test scope: 0.4～10.3MPa.
Above-mentioned least square method is to find the optimal function coupling of one group of data by the quadratic sum of minimum error.
Above-mentioned different pit sand masonry mortar compression conversion experimental formula error demonstration test makes average relative error be not more than 18%, and the relative standard deviation is not more than 20%.
The invention has the beneficial effects as follows and to carry out on-site evaluation to the mountain sand masonry mortar, with this foundation of inferring as pit sand masonry mortar compression, method is simple, practical reliable, on-the-spot detection pit sand masonry mortar compression error is less, the accuracy that detects significantly improves, and can guarantee the on-the-spot accuracy that detects of mountain sand masonry mortar, helps guaranteeing construction quality.
The present invention can effectively reduce the detection error that adopts traditional penetration method detection compression strength of building mortar detection method to bring through long-term analysis of experiments by the strong curve of survey of setting up mountain sand special use, has guaranteed the on-the-spot accuracy that detects of masonry project.Verify through the contrast experiment: adopt with the dish mortar and build masonry by laying bricks or stones, making test block simultaneously carries out with the condition maintenance, on the masonry mortar joint, carry out penetration test, with the method for carrying out compressive strength test with condition maintenance mortar specimen, obtain the strong regression equation of survey of 3 kind mountain sand masonry mortars such as cement mixing mortar, sand-cement slurry and yellow ground mortar, in the Validity Test scope, the strong curve negotiating error of the survey demonstration test of each kind mountain sand masonry mortar, its average relative error is not more than 18%, the relative standard deviation is not more than 20%, satisfies the accuracy requirement of on-the-spot test.
Interventions Requested and result such as following table:
Embodiment
The embodiment of the inventive method:
(1), on the masonry horizontal mortar joint, evenly arrange measuring point, each member is arranged 16 points; Measuring point should avoid being arranged in the edge of brick and have the cavity or loosening masonry mortar on, spacing should not be less than 240mm between measuring point, every mortar joint measuring point should not be more than 2.
(2), when the mortar joint of masonry after polishing, when still being difficult to reach smooth, can before injection detects, read the mortar surface irregularity degree d at measuring point place at measuring point place mark with the survey of depth of penetration meter
i 0And record, and then carry out penetration test at the measuring point place of mark; The smooth injection of can directly carrying out after polishing of the mortar joint of masonry detects;
(3), will survey in the survey nail seat that nail inserts penetrometer, survey the nail tip outwardly, fix and survey nail;
(4), screw nut (or using loading pole) with rocking handle the injection bar outwards extracted, till hook hangs up, then nut is retreated to injection masthead end (or taking off loading pole);
(5), the penetrometer homalocephalus is aimed in the middle of the mortar joint, and vertically be attached to the surface of tested masonry mortar joint mortar, hold the penetrometer handle, pull trigger, will survey and follow closely in the tested mortar of injection; When mortar was imperfect around the mortar joint mortar inside at measuring point place exists cavity or gaging hole, this measuring point should cancel, and the alternative measuring point is mended and surveyed;
(6), will survey nail puller and go out, with hair-dryer the dust in the gaging hole is blown clean;
(7), depth of penetration meter homalocephalus is aimed at mortar joint, simultaneously gauge head is inserted in the gaging hole, and keep the surface of meter, from dial plate, directly read meter displayed value d ' perpendicular to tested masonry mortar joint mortar
iAnd record;
(8), the depth of penetration of measurement mortar joint mortar surface irregularity degree should be calculated as follows:
The mortar joint mortar directly carries out the injection detection after sanding of flat is whole depth of penetration should be calculated as follows: d
i=20.00-d '
iWherein: d
i, the depth of penetration value of i measuring point is accurate to 0.01mm; d
i 0, the irregularity degree reading of the depth of penetration meter of i measuring point is accurate to 0.01mm; D '
i, the depth of penetration meter reading of i measuring point is accurate to 0.01mm;
(9), detect in the numerical value, 3 maximal values and 3 minimum value in 16 depth of penetration values should be rejected, then 10 depth of penetration values of remainder are averaged by following formula;
(10), according to the member depth of penetration mean value that calculates gained, can get its mortar compressive strength scaled value by the strong regression equation calculation of survey of different mortar kinds.
Least square method is a kind of mathematical optimization technology, and it finds the optimal function coupling of one group of data by the quadratic sum of minimum error.The simplest available method is tried to achieve some absolute unknowable true value, and makes the square-error sum for minimum.Least square method is generally used for curve fitting.Much other optimization problem also can be expressed with least squares formalism by minimization of energy or maximization entropy.
Claims (9)
1. detection method of pit sand masonry mortar compression resistance penetration method is characterized in that having following detection step:
Step 1 is evenly arranged measuring point on detected mountain sand masonry mortar masonry horizontal mortar joint;
Step 2, the place polishes flat with measuring point;
Step 3 is aimed at above-mentioned measuring point with penetrometer and is detected one by one, is obtained the depth of penetration reading value d ' of each measuring point by the depth of penetration meter of penetrometer
i
Step 4 is calculated as follows the depth of penetration value d that obtains each measuring point according to depth of penetration numerical value
i: d
i=2000-d '
i, wherein: the depth of penetration value d of i measuring point
iBe accurate to 0.01mm, the depth of penetration meter reading value d ' of i measuring point
iBe accurate to 0.01mm;
Step 5 is rejected maximal value and minimum value in the depth of penetration value, then the depth of penetration value of remainder is calculated, and obtains depth of penetration mean value md;
Step 6 according to depth of penetration mean value md, obtains following different pit sand masonry mortar compression conversion experimental formula by the strong regression equation calculation of survey of different mountain sand mortar kinds:
The cement mixing mortar:
Validity Test scope: 0.4～15.8MPa;
Sand-cement slurry:
Validity Test scope: 0.4～16.0MPa;
The yellow ground mortar:
Validity Test scope: 0.4～10.3MPa;
In the formula: f
2, e cBe compression strength of building mortar, md is a masonry mortar depth of penetration mean value; Draw the compressive strength of tested mountain sand masonry mortar according to above-mentioned experimental formula.
2. detection method of pit sand masonry mortar compression resistance penetration method according to claim 1 is characterized in that: in the above-mentioned steps 1 between measuring point spacing be not less than 240mm, no more than 2 of every mortar joint measuring point, at least 12 of total measuring points.
3. detection method of pit sand masonry mortar compression resistance penetration method according to claim 1, it is characterized in that: above-mentioned steps 2 when the mortar joint of masonry after polishing, when still being difficult to reach smooth, at measuring point place mark, before detecting, injection reads the mortar surface irregularity degree d at measuring point place with the survey of depth of penetration meter
i 0And record, and then carry out penetration test with penetrometer at the measuring point place of mark.
4. detection method of pit sand masonry mortar compression resistance penetration method according to claim 1 is characterized in that: the concrete detection step of above-mentioned steps 3 is as follows:
I, will survey in the survey nail seat that nail inserts penetrometer, survey the nail tip outwardly, and fix and survey nail;
II, screw nut, the injection bar is outwards extracted, till hook hangs up, then nut is retreated to injection masthead end;
III, the penetrometer homalocephalus is aimed in the middle of the mortar joint, and vertically be attached to the surface of tested masonry mortar joint mortar, hold the penetrometer handle, pull trigger, will survey and follow closely in the tested mortar of injection;
IV, will survey nail puller and go out, the dust in the gaging hole be blown clean with hair-dryer;
V, depth of penetration meter homalocephalus is aimed at mortar joint, simultaneously gauge head is inserted in the gaging hole, and keep the surface of meter, from dial plate, directly read meter displayed value d ' perpendicular to tested masonry mortar joint mortar
iAnd record.
5. detection method of pit sand masonry mortar compression resistance penetration method according to claim 4 is characterized in that: when mortar was imperfect around the mortar joint mortar inside at measuring point place exists cavity or gaging hole, this measuring point cancelled, and the alternative measuring point is mended and surveyed.
6. detection method of pit sand masonry mortar compression resistance penetration method according to claim 1 is characterized in that: above-mentioned steps 4 is calculated as follows the depth of penetration of measuring mortar joint mortar surface irregularity degree:
The irregularity degree reading d of the depth of penetration meter of i measuring point
i 0Be accurate to 0.01mm.
7. detection method of pit sand masonry mortar compression resistance penetration method according to claim 1 is characterized in that: above-mentioned steps 6 described different pit sand masonry mortar compression conversion experimental formulas obtain with the following method:
Step a, employing mountain sand and Binder Materials preparation mountain sand masonry mortar are built masonry by laying bricks or stones with the mountain sand masonry mortar;
Step b, with step a simultaneously, use with winding sand masonry mortar and make mortar specimen;
Step c, above-mentioned masonry and test block are carried out with the condition maintenance;
Steps d, carry out penetration test with penetrometer on the masonry mortar joint of step a, getting depth of penetration mean value is the mm of typical value md unit, is accurate to 0.01mm;
Step e, carry out compressive strength test with the mortar specimen of step b on the compressive strength test machine, the compressive strength mean value of mortar specimen is typical value f2, and units MPa is accurate to 0.1MPa;
Step f, the f2 that presses each group test block and corresponding one group md data adopt least square method to carry out the calculating that the mountain sand masonry mortar is surveyed strong regression equation, obtain different pit sand masonry mortar compression conversion experimental formulas:
The cement mixing mortar:
Validity Test scope: 0.4～15.8MPa;
Sand-cement slurry:
Validity Test scope: 0.4～16.0MPa;
The yellow ground mortar:
Validity Test scope: 0.4～10.3MPa.
8. a kind of detection method of pit sand masonry mortar compression resistance penetration method according to claim 7 is characterized in that: above-mentioned least square method is to find the optimal function coupling of one group of data by the quadratic sum of minimum error.
9. a kind of detection method of pit sand masonry mortar compression resistance penetration method according to claim 7, it is characterized in that: above-mentioned different pit sand masonry mortar compression conversion experimental formula error demonstration tests, make average relative error be not more than 18%, the relative standard deviation is not more than 20%.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175110A (en) * | 2010-12-28 | 2011-09-07 | 中国一冶集团有限公司 | Method for detecting mortar joints of coke oven |
| CN102539234A (en) * | 2011-11-18 | 2012-07-04 | 广州市水务科学研究所 | Judgment method using penetration method to detect strength slurry, stone and mortar |
| CN103439222A (en) * | 2013-08-09 | 2013-12-11 | 长安大学 | Cold supplement asphalt mixture low temperature working performance testing device and testing method |
| CN110057653A (en) * | 2019-05-09 | 2019-07-26 | 黄明誉 | One kind is built a wall strength simulation detection method |
| CN110702514A (en) * | 2019-10-15 | 2020-01-17 | 杭州明磊建筑工程技术有限公司 | Process for evaluating strength of mortar in brick-concrete structure |
| CN113049446A (en) * | 2021-03-22 | 2021-06-29 | 上海市建筑科学研究院有限公司 | Mechanical automatic stress application mortar compressive strength detector and use method thereof |
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| CN113075089A (en) * | 2021-03-22 | 2021-07-06 | 上海市建筑科学研究院有限公司 | Remote management system for detecting compressive strength of mortar and using method |
| CN116084726A (en) * | 2022-10-14 | 2023-05-09 | 杭州明磊建筑工程技术有限公司 | Brick wall mortar joint reinforcing method |
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2008
- 2008-07-28 CN CNA2008103031190A patent/CN101329239A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175110A (en) * | 2010-12-28 | 2011-09-07 | 中国一冶集团有限公司 | Method for detecting mortar joints of coke oven |
| CN102175110B (en) * | 2010-12-28 | 2013-02-27 | 中国一冶集团有限公司 | Method for detecting mortar joints of coke oven |
| CN102539234A (en) * | 2011-11-18 | 2012-07-04 | 广州市水务科学研究所 | Judgment method using penetration method to detect strength slurry, stone and mortar |
| CN103439222A (en) * | 2013-08-09 | 2013-12-11 | 长安大学 | Cold supplement asphalt mixture low temperature working performance testing device and testing method |
| CN103439222B (en) * | 2013-08-09 | 2016-03-02 | 长安大学 | A kind of cold repairing asphalt mixture low-temperature working performance testing device and method of testing |
| CN110057653A (en) * | 2019-05-09 | 2019-07-26 | 黄明誉 | One kind is built a wall strength simulation detection method |
| CN110702514A (en) * | 2019-10-15 | 2020-01-17 | 杭州明磊建筑工程技术有限公司 | Process for evaluating strength of mortar in brick-concrete structure |
| CN113049446A (en) * | 2021-03-22 | 2021-06-29 | 上海市建筑科学研究院有限公司 | Mechanical automatic stress application mortar compressive strength detector and use method thereof |
| CN113049411A (en) * | 2021-03-22 | 2021-06-29 | 上海市建筑科学研究院有限公司 | Intelligent device for measuring wood strength and use method |
| CN113075089A (en) * | 2021-03-22 | 2021-07-06 | 上海市建筑科学研究院有限公司 | Remote management system for detecting compressive strength of mortar and using method |
| CN116084726A (en) * | 2022-10-14 | 2023-05-09 | 杭州明磊建筑工程技术有限公司 | Brick wall mortar joint reinforcing method |
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