CN110455868A - A method of concrete construction site early moist curing effect is detected using surface resistivity - Google Patents
A method of concrete construction site early moist curing effect is detected using surface resistivity Download PDFInfo
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- CN110455868A CN110455868A CN201910763553.5A CN201910763553A CN110455868A CN 110455868 A CN110455868 A CN 110455868A CN 201910763553 A CN201910763553 A CN 201910763553A CN 110455868 A CN110455868 A CN 110455868A
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- 238000010276 construction Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000000694 effects Effects 0.000 title claims abstract description 29
- 238000005259 measurement Methods 0.000 claims abstract description 31
- 238000004088 simulation Methods 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 238000012423 maintenance Methods 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000004035 construction material Substances 0.000 abstract description 3
- 238000011161 development Methods 0.000 description 4
- 230000001418 larval effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
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Abstract
The present invention relates to a kind of methods using surface resistivity detection concrete construction site early moist curing effect, belong to construction material detection technology field.The present invention passes through simulation Practical Project early moist curing, using match ratio identical as Practical Project, concrete surface resistivity is obtained with the changing rule of early moist curing age, and carry out linear fit, obtain standard fit straight line, concrete surface resistivity under the early moist curing of construction site is compared with the variation fitting a straight line of early moist curing age with standard fit straight line, to detect practice of construction on-site concrete early moist curing effect.The method of the present invention has many advantages, such as that measurement process is convenient, fast, lossless.
Description
Technical field
The present invention relates to a kind of methods using surface resistivity detection concrete construction site early moist curing effect, belong to
In construction material detection technology field.
Background technique
Concrete is one of construction material with the most use in modern architecture, at present for concrete curing in construction work
The ununified judgment criteria of effect, and concrete curing is insufficient, will affect hydrated cementitious degree in concrete, shrinkage,
The strength development of the endurance qualities such as anti-carbonation, impermeabilisation, freeze thawing resistance circulation and concrete.Maintenance effect is better, and concrete is micro-
Development can constantly be refined by seeing structure, and macro property also can constantly enhance.If the simple and quick judgement concrete curing effect of energy, i.e.,
Its intensity and endurance quality after certifiable concrete hardening, are of great significance to Practical Project.
With the continuous development of concrete application technology, concrete performance is required also to be continuously improved, for concrete
Maintenance and the detection of concrete curing effect also develop in succession.And current existing concrete curing effect detection means, generally
Be built upon under specific detection technique and detection environment, and there is contingency, can not comprehensively, accurately reflect concrete and exist
Its maintenance course in maintenance processes, most of detection means not only need the operating process of larger fund cost and complexity,
And detection process may need to cut concrete and drill through destruction.Therefore, using a kind of easy, quickly lossless inspection
Survey technology judges concrete curing effect, detects to concrete curing course, is the following concrete curing effect
The development trend of judge.
Summary of the invention
In view of the problems of the existing technology the present invention, provides a kind of utilization surface resistivity detection concrete construction site
The method of early moist curing effect, the present invention is by simulation Practical Project early moist curing, using cooperation identical as Practical Project
Than, concrete surface resistivity is obtained with the changing rule of curing age, and carry out linear fit, obtain standard fit straight line,
Construction site is conserved into lower concrete surface resistivity with the variation fitting a straight line and standard fit straight line of early moist curing age
It compares, to detect practice of construction on-site concrete maintenance effect.
A method of concrete construction site early moist curing effect being detected using surface resistivity, specific steps are such as
Under:
(1) concrete mix identical with construction site is prepared at construction simulation scene；
(2) step (1) concrete mix is subjected to the molding of standard cube mould, then conserves the above demoulding for 24 hours and obtains
To standard cube concrete sample；
(3) step (2) standard cube concrete sample is placed under the early moist curing mode of construction simulation scene and is conserved
To 28d or more, while standard cube concrete sample is measured in the surface resistivity of different early moist curing ages；
(4) it is drawn according to step (3) standard cube concrete sample in the surface resistivity of different early moist curing ages
The surface resistivity of standard cube concrete sample processed is denoted as standard curve with the change curve of early moist curing age, mark
Directrix curve linear fit obtains standard fit straight line, calculates standard fit degree
(5) surface resistivity of the measurement construction site concrete sample to be measured in different early moist curing ages, according to
Concrete sample is surveyed in the surface resistivity of different curing ages, the surface resistivity for drawing concrete sample to be measured is wet with early stage
The change curve of curing age, is denoted as measured curve, and measured curve linear fit obtains actual measurement fitting a straight line, it is quasi- to calculate actual measurement
It is right
(6) by the standard fit degree of step (4)With the actual measurement degree of fitting of step (5)Comparison, passes through formulaFitting margin ω is calculated；If ω≤10%, early moist curing effect is good；If ω > 10%,
Early moist curing effect is good.
The side length of step (2) the standard cube concrete sample is 150mm.
The temperature of step (2) maintenance is 18~22 DEG C, and relative humidity is greater than 95%.
Step (3) construction simulation scene early moist curing mode are as follows: curing period concrete sample is maintained at relatively
In the environment of 85% or more humidity.
The surface resistivity measurement curing age of step (5) construction site concrete sample to be measured and step (3) are marked
The surface resistivity measurement curing age of pseudo-cubic concrete sample is identical.
Preferably, the surface resistivity measurement early moist curing age of construction site concrete to be measured and standard cube are mixed
The surface resistivity measurement early moist curing age of solidifying soil test specimen is 1d, 2d, 3d, 7d, 14d, 21d and 28d of curing period.
Preferably, surface resistivity is measured as standard cube concrete sample side resistive rate, total by four sides
Eight data, remove maximum value and minimum value, and lower six statistical averages of remainder are represented as concrete sample surface resistivity
Value.
The beneficial effects of the present invention are:
(1) present invention obtains coagulation using match ratio identical as Practical Project by simulation Practical Project early moist curing
Native surface resistivity and carries out linear fit with the changing rule of early moist curing age, obtains standard fit straight line, will construct
Concrete surface resistivity compares with the variation fitting a straight line of curing age with standard fit straight line under live early moist curing,
To detect practice of construction on-site concrete early moist curing effect；
(2) present invention has many advantages, such as that measurement process is convenient, fast, lossless；Using surface resistivity instrument to concrete table
Surface resistivity measures, and accurately measurement obtains the surface resistivity of concrete, substantially reduces the difficulty of detection, improves detection
Speed；Compared with prior art, propose the method for the present invention can live non-destructive testing concrete early moist curing, it is convenient to operate
Simply.
Detailed description of the invention
Fig. 1 be 1 construction simulation situ wet maintenance method of embodiment under surface of test piece resistivity with age standard curve with
Standard fit straight line；
Fig. 2 be 1 practice of construction situ wet maintenance method of embodiment under surface of test piece resistivity with age measured curve with
Survey matched curve；
Fig. 3 is 1 standard fit straight line of embodiment and the comparison diagram for surveying matched curve；
Fig. 4 be 2 construction simulation situ wet maintenance method of embodiment under surface of test piece resistivity with age standard curve with
Standard fit straight line；
Fig. 5 be 2 practice of construction situ wet maintenance method of embodiment under surface of test piece resistivity with age measured curve with
Survey matched curve；
Fig. 6 is 2 standard fit straight line of embodiment and the comparison diagram for surveying matched curve.
Specific embodiment
Invention is further described in detail With reference to embodiment, but protection scope of the present invention and unlimited
In the content.
Surface resistivity is measured as standard cube concrete sample side resistive rate in the embodiment of the present invention, passes through four
Side totally eight data, remove maximum value and minimum value, lower six statistical averages of remainder are as concrete sample sheet resistance
Rate typical value.
Embodiment 1: the present embodiment concrete component is as shown in table 1；
1 concrete component of table
A method of concrete construction site early moist curing effect being detected using surface resistivity, specific steps are such as
Under:
(1) concrete mix identical with construction site is prepared at construction simulation scene；
(2) step (1) concrete mix is subjected to the molding of standard cube mould, then conserves the above demoulding for 24 hours and obtains
To standard cube concrete sample；Wherein the side length of standard cube concrete sample is 150mm, the temperature of maintenance is 18~
22 DEG C, relative humidity is greater than 95%；
(3) step (2) standard cube concrete sample is placed under the early moist curing mode of construction simulation scene and is conserved
To 28d, while standard cube concrete sample is measured in the surface resistivity (being shown in Table 2) of different early moist curing ages；Its
Middle construction simulation scene maintenance method is standard cube concrete sample, and curing period concrete sample is maintained at relative humidity
In 85% or more environment；The surface resistivity measurement curing age of standard cube concrete sample is the of curing age
1d, 2d, 3d, 7d, 14d, 21d and 28d；
Different larval instar concrete surface resistivity under 2 construction simulation scene maintenance method of table
(4) standard is drawn in the surface resistivity of different curing ages according to step (3) standard cube concrete sample
The surface resistivity of cube concrete sample is denoted as standard curve (see Fig. 1) with the change curve of curing age, is used
Origin data processing software obtains standard fit straight line (see Fig. 1) to standard curve linear fit, calculates standard fit degreeIt is 0.16036；
(5) surface resistivity (be shown in Table 3) of the measurement construction site concrete sample to be measured in different early moist curing ages,
According to concrete sample to be measured different curing ages surface resistivity, draw the surface resistivity of concrete sample to be measured with
The change curve of curing age is denoted as measured curve (see Fig. 2), and measured curve linear fit obtains actual measurement fitting a straight line (see figure
2) actual measurement degree of fitting, is calculatedIt is 0.16265；Wherein the surface resistivity measurement of construction site concrete sample to be measured is supported
The surface resistivity measurement curing age of length of service as a nurse phase and standard cube concrete sample be 1d, 2d of curing period, 3d,
7d, 14d, 21d and 28d；
Different larval instar concrete surface resistivity under 3 practice of construction scene maintenance method of table
(6) the actual measurement fitting a straight line of the standard fit straight line of step (4) and step (5) is compared into (see Fig. 3), digital simulation
Marginω≤10%, testing result are that early moist curing effect is good.
Embodiment 2: the present embodiment concrete component is as shown in table 4；
4 concrete component of table
A method of concrete construction site early moist curing effect being detected using surface resistivity, specific steps are such as
Under:
(1) concrete mix identical with construction site is prepared at construction simulation scene；
(2) step (1) concrete mix is subjected to the molding of standard cube mould, then conserves the above demoulding for 24 hours and obtains
To standard cube concrete sample；Wherein the side length of standard cube concrete sample is 150mm, the temperature of maintenance is 18~
22 DEG C, relative humidity is greater than 95%；
(3) step (2) standard cube concrete sample is placed under the early moist curing mode of construction simulation scene and is conserved
To 28d, while standard cube concrete sample is measured in the surface resistivity (being shown in Table 5) of different curing ages；Wherein simulate
Construction site maintenance method be standard cube concrete sample, curing period concrete sample be maintained at relative humidity 85% with
On environment in；Standard cube concrete sample surface resistivity measurement curing age be curing period 1d, 2d,
3d, 7d, 14d, 21d and 28d；
Different larval instar concrete surface resistivity under 5 construction simulation scene maintenance method of table
(4) it is drawn according to step (3) standard cube concrete sample in the surface resistivity of different early moist curing ages
The surface resistivity of standard cube concrete sample processed is denoted as standard curve (see Fig. 4), adopts with the change curve of curing age
Standard fit straight line (see Fig. 4) is obtained to standard curve linear fit with Origin data processing software, calculates standard fit
DegreeIt is 0.18315；
(5) surface resistivity (be shown in Table 6) of the measurement construction site concrete sample to be measured in different early moist curing ages,
According to concrete sample to be measured in the surface resistivity of different curing ages, the surface resistivity of concrete to be measured is drawn with maintenance
The change curve of age is denoted as measured curve (see Fig. 5), and measured curve linear fit obtains actual measurement fitting a straight line (see Fig. 5), meter
Calculate actual measurement degree of fittingIt is 0.80628；The wherein surface resistivity measurement curing age and mark of construction site concrete to be measured
Pseudo-cubic concrete sample surface resistivity measurement curing age be curing period 1d, 2d, 3d, 7d, 14d, 21d and
28d；
Different larval instar concrete surface resistivity under 6 practice of construction scene maintenance method of table
(6) the actual measurement fitting a straight line of the standard fit straight line of step (4) and step (5) is compared into (see Fig. 6), digital simulation
Marginω > 10%, testing result are that early moist curing effect is bad.
Claims (5)
1. a kind of method using surface resistivity detection concrete construction site early moist curing effect, which is characterized in that tool
Steps are as follows for body:
(1) concrete mix identical with construction site is prepared at construction simulation scene；
(2) step (1) concrete mix is subjected to the molding of standard cube mould, then conserves the above demoulding for 24 hours and is marked
Pseudo-cubic concrete sample；
(3) step (2) standard cube concrete sample is placed under the early moist curing mode of construction simulation scene and is conserved to 28d
More than, while standard cube concrete sample is measured in the surface resistivity of different early moist curing ages；
(4) surface resistivity according to step (3) standard cube concrete sample in different early moist curing ages draws mark
The surface resistivity of pseudo-cubic concrete sample is denoted as standard curve with the change curve of early moist curing age, and standard is bent
Line linear fit obtains standard fit straight line, calculates standard fit degree
(5) surface resistivity of the measurement construction site concrete sample to be measured in different early moist curing ages, according to be measured mixed
Surface resistivity of the solidifying soil test specimen in different early moist curing ages, draws the surface resistivity of concrete sample to be measured with early stage
The change curve of wet curing age, is denoted as measured curve, and measured curve linear fit obtains actual measurement fitting a straight line, calculates actual measurement
Degree of fitting
(6) by the standard fit degree of step (4)With the actual measurement degree of fitting of step (5)Comparison, passes through formulaFitting margin ω is calculated；If ω≤10%, early moist curing effect is good；If ω > 10%,
Early moist curing effect is good.
2. the method for detecting concrete construction site early moist curing effect using surface resistivity according to claim 1,
It is characterized by: the side length of step (2) standard cube concrete sample is 150mm.
3. the method for detecting concrete construction site early moist curing effect using surface resistivity according to claim 1,
It is characterized by: the temperature of step (2) maintenance is 18~22 DEG C, relative humidity is greater than 95%.
4. the method for detecting concrete construction site early moist curing effect using surface resistivity according to claim 1,
It is characterized by: step (3) construction simulation scene early moist curing mode are as follows: be placed on curing period concrete sample relatively wet
It is conserved in the environment that degree is 85% or more.
5. the method for detecting concrete construction site early moist curing effect using surface resistivity according to claim 1,
It is characterized by: the surface resistivity measurement curing age and step (3) standard of step (5) construction site concrete sample to be measured
The surface resistivity measurement curing age of cube concrete sample is identical.
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Cited By (1)
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| CN112082840A (en) * | 2020-10-29 | 2020-12-15 | 怀化明达建材有限公司 | Method for establishing concrete crack resistance curve |
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