CN113533141A - Method for testing water absorption of silane impregnated concrete - Google Patents
Method for testing water absorption of silane impregnated concrete Download PDFInfo
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- CN113533141A CN113533141A CN202110720682.3A CN202110720682A CN113533141A CN 113533141 A CN113533141 A CN 113533141A CN 202110720682 A CN202110720682 A CN 202110720682A CN 113533141 A CN113533141 A CN 113533141A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/04—Investigating osmotic effects
Abstract
The application relates to a method for testing water absorption of silane impregnated concrete, which comprises the following steps: determining a test area of concrete to be tested; arranging one end of a water injection pipe on the test area, and forming a water injection space isolated from the outside above the test area; connecting the other end of the water injection pipe with a pressurizing device; and calculating the water absorption of the concrete according to the water quantity change in the water injection pipe and the working time of the pressurizing device. Compared with the prior art, the method and the device can realize the rapid test of the water absorption of the silane impregnated concrete.
Description
Technical Field
The invention relates to the field of buildings, in particular to a method for testing water absorption of silane impregnated concrete.
Background
The durability of concrete structures has been a focus of attention. The silane impregnation anticorrosion technology for concrete can effectively inhibit the permeation and erosion of harmful substances such as moisture, salts, acidic substances and the like, improve the structural durability and save the maintenance cost, and is widely applied to the major projects such as maritime work, hydraulic work, bridges and the like at present.
The water absorption of the silane impregnated concrete is one of the most intuitive and effective indexes for evaluating the silane impregnated construction effect. At present, the water absorption of the existing silane impregnated concrete is tested by adopting a laboratory test block core drilling sample, the testing time is usually 265 minutes, the actual engineering structure core drilling sample can damage the concrete structure, and the existing testing method is time-consuming, high in cost and not feasible.
Therefore, how to realize the rapid test of the water absorption of the concrete is a technical problem which needs to be solved urgently.
Disclosure of Invention
In view of the above drawbacks and deficiencies of the prior art, the present invention provides a method for testing water absorption of silane-impregnated concrete, which can realize rapid testing of water absorption of silane-impregnated concrete.
In order to solve the technical problem, the invention provides a method for testing the water absorption of silane impregnated concrete, which comprises the following steps:
determining a test area of concrete to be tested;
arranging one end of a water injection pipe on the test area, and forming a water injection space isolated from the outside above the test area;
connecting the other end of the water injection pipe with a pressurizing device;
and calculating the water absorption of the concrete according to the water quantity change in the water injection pipe and the working time of the pressurizing device.
Further preferably, before the step of determining the test area of the concrete to be tested, the method further comprises:
selecting concrete with different strength grades to manufacture concrete members with set volume;
after the concrete member is manufactured and waits for a preset time, impregnating the concrete member with silane with a preset concentration and drying the concrete member;
marking a test area of the concrete to be tested on the concrete member.
Further preferably, the step of disposing one end of the water injection pipe on the test area and forming a water injection space isolated from the outside above the test area further comprises:
manufacturing a water injection pipe by adopting a glass material; wherein, the water injection pipe includes: the device comprises a cover body part for covering the test area, and a cylindrical part which is communicated with the cover body part and is provided with zero liquid level scales; the wall thickness of the water injection pipe is 2-3 mm; the volume of the water quantity which can be injected by the water injection pipe is 4mL or 10 mL; the bottom area of the cap body portion is the same as the test area.
Further preferably, the step of disposing one end of the water injection pipe on the test region so that a water injection space isolated from the outside can be formed above the test region includes:
one end of the water injection pipe is attached to the surface of the concrete, so that the area positioned in the water injection pipe can form the test area;
and sealing the connecting part of the water injection pipe and the concrete by using a sealant so as to form the water injection space.
Further preferably, the step of connecting the other end of the water injection pipe with a pressurizing device further comprises:
and injecting a preset water quantity into the water injection pipe.
Further preferably, the step of calculating the water absorption rate of the concrete according to the change of the water amount in the water filling pipe and the working time of the pressurizing device comprises:
operating the pressurizing device according to the set operating time;
according to a preset division rule, dividing the working time into a plurality of time intervals in sequence to determine the water absorption capacity corresponding to each time interval;
calculating according to the water absorption capacity, the time interval and a water absorption calculation formula to obtain the water absorption of the concrete;
wherein, the
The above-mentioned
The above-mentioned
Wherein a is the concrete water absorption rate; the i is a natural number; the Ti is the ith time interval; and Hi is the water absorption capacity of the test area in unit area in the ith time interval.
Further preferably, the preset division rule divides the working time into a plurality of time intervals in sequence, and the step of determining the water absorption capacity corresponding to each time interval comprises:
dividing the working time into a plurality of time intervals according to a preset division rule;
observing the scale indication number of the liquid level of the corresponding water injection pipe at each time interval to determine the water absorption amount corresponding to each time interval respectively, and dividing the working time into a plurality of time intervals in sequence according to a preset division rule;
and observing the scale indication number of the liquid level of the corresponding water injection pipe at each time interval to determine the water absorption amount corresponding to each time interval.
Further preferably, the step of sequentially dividing the working time into a plurality of time intervals according to a preset dividing rule to determine the water absorption capacity corresponding to each time interval includes: measuring the liquid level height of the water injection pipe in real time through a liquid level meter preset in the water injection pipe, and calculating to obtain water volume change data according to a preset liquid level area formula; dividing the working time into a plurality of time intervals according to a preset division rule; and obtaining the water absorption amount corresponding to each interval time according to each time interval and the water amount change data.
Further preferably, the liquid level meter is arranged above the zero-position liquid level scale of the water injection pipe before the other end of the water injection pipe is connected with the pressurizing device, and the liquid level meter and the pressurizing device are electrically connected with the main control device; wherein the liquid surface area formula is 0.25 pi D2(ii) a Wherein D is the diameter of the cylindrical part of the water injection pipe.
Further preferably, the step of sequentially dividing the working time into a plurality of time intervals according to a preset dividing rule is specifically; dividing the working time into a plurality of time intervals which are arranged in sequence according to an increasing rule, wherein the sum of the time intervals is equal to the working time; wherein i is greater than or equal to 6, and when i is equal to 6, the time intervals are 1 minute, 2 minutes, 3 minutes, 4 minutes, 5 minutes, and 6 minutes, respectively, in this order.
Further preferably, the step of connecting the other end of the water injection pipe with a pressurizing device comprises:
and when the water quantity injected into the water injection pipe reaches the zero-position liquid level scale, the water injection pipe is communicated with the pressurizing device through a rubber hose, wherein the pressurizing device is a pressurizing pump electrically connected with a main control device.
Compared with the prior art, the invention has the following beneficial effects:
the test method can realize the rapid test of the water absorption of the concrete.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1: a flow chart of a test method for water absorption of silane impregnated concrete in a first embodiment of the invention;
FIG. 2: a detailed flowchart of step S10 in the first embodiment of the present invention;
FIG. 3: a flow chart of yet another preferred test method for silane impregnated concrete water absorption in the first embodiment of the present invention;
FIG. 4: a detailed flowchart of step S20 in the first embodiment of the present invention;
FIG. 5: a detailed flowchart of step S40 in the first embodiment of the present invention;
FIG. 6: a detailed flowchart of step S30 in the first embodiment of the present invention;
FIG. 7: a detailed flowchart of step S402 in the first embodiment of the present invention;
FIG. 8: the structure schematic diagram of the water injection pipe in the first embodiment of the invention during the test;
FIG. 9: the structure schematic diagram of the water injection pipe in the second embodiment of the invention during the test;
FIG. 10: a detailed flowchart of step S402 in the second embodiment of the present invention;
reference numerals:
a concrete member 2; the water injection pipe 1, the cover body part 11, the cylindrical part 12 and the zero-position liquid level scale 13;
a rubber hose 3, a pressure device 5 and a liquid level meter 6.
Detailed Description
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Example 1
As shown in fig. 1 to 8, a first embodiment of the present invention provides a method for testing water absorption of silane-impregnated concrete, including:
step S10, determining a test area of the concrete to be tested;
step S20, arranging one end of the water injection pipe 1 on the test area, and forming a water injection space isolated from the outside above the test area;
step S30, connecting the other end of the water injection pipe 1 with a pressurizing device 5;
and step S40, calculating the water absorption of the concrete according to the water quantity change in the water injection pipe 1 and the working time of the pressurizing device 5.
As can be seen from the above, since the test method employs the pressurizing device 5 to pressurize the water amount injected into the water injection pipe 1, the water amount can rapidly penetrate into the test area on the concrete, and therefore, the concrete water absorption rate can be rapidly calculated according to the change of the water amount in the water injection pipe and the method using the operating time of the pressurizing device 5 as the penetration time.
Specifically, as shown in fig. 2, before the step of determining the test area of the concrete to be tested, the method further includes:
step S101: selecting concrete with different strength grades to manufacture a concrete member 2 with a set volume; for example, a concrete member having a cubic shape of 150mm × 150mm × 150mm is produced using C30, C35, C40, C45, and C50 concrete.
Step S102: after the concrete member 2 is manufactured and waits for a preset time, impregnating the concrete member with silane with a preset concentration and drying the concrete member; for example, the concrete is cured for 14 days, and then is sprayed or directly immersed in a silane liquid or the like.
Step S103: on the concrete component 2, a test area of the concrete to be tested is marked, wherein the test area coincides with the upper surface of the concrete component 2.
The steps are as follows: the performance of the concrete to be constructed can be evaluated by performing a rapid test on the water absorption of the silane-impregnated concrete member in advance for the adjustment of the subsequent scheme. Obviously, by adopting the steps S10-40 in the embodiment, the test can be directly performed on the constructed concrete without sampling for testing, so as to meet the actual test requirement, and the damage of the concrete caused by the conventional method that the sample is required for testing can be avoided.
Further preferably, as shown in fig. 3, the step of disposing one end of the water injection pipe 1 on the test area and forming a water injection space isolated from the outside above the test area further comprises:
step S15, manufacturing the water injection pipe 1 by adopting a glass material; wherein, the water injection pipe 1 includes: the device comprises a cover body part 11 for covering the test area, a cylindrical part 12 which is communicated with the cover body part 11 and is provided with a zero-position liquid level scale 13; the wall thickness of the water injection pipe 1 is 2-3 mm; the volume of the water quantity which can be injected by the water injection pipe 1 is 4mL or 10 mL; the bottom area of the cap body portion 11 is the same as the test area.
Through water injection pipe 1, can effectively increase test area, and the convenient water injection volume of taking notes.
Further preferably, the step of disposing one end of the water injection pipe 1 on the test area so that a water injection space isolated from the outside can be formed above the test area includes:
step S201: one end of the water injection pipe 1 is tightly attached to the surface of the concrete, so that the area positioned in the water injection pipe 1 can form the test area;
step S202: and sealing the connecting part of the water injection pipe 1 and the concrete by using a sealant so as to form the water injection space.
The steps are as follows: through the water injection mode, the water quantity in the water injection pipe 1 can only permeate in the test area, so that the test accuracy can be improved.
Further preferably, as shown in fig. 5, the step of calculating the water absorption rate of the concrete according to the change of the water amount in the water injection pipe 1 and the operation time of the pressurizing device 5 includes:
step S401: operating the pressurizing device according to the set operating time;
step S402: according to a preset division rule, dividing the working time into a plurality of time intervals in sequence to determine the water absorption capacity corresponding to each time interval;
step S403: calculating according to the water absorption capacity, the time interval and a water absorption calculation formula to obtain the water absorption of the concrete; wherein the content of the first and second substances,
the above-mentioned
The above-mentioned
The above-mentioned
Wherein a is the concrete water absorption rate; the i is a natural number; the T isiIs the ith time interval; said HiIs the amount of water absorbed per unit area of the test area in the ith time interval.
In addition, for convenience of calculation, the above-mentioned HiCan be represented by formula Hi＝Vi/(0.25πd2) Performing a calculation wherein ViIs TiThe corresponding water absorption increment; d is the diameter of the contact surface of the injection pipe and the surface of the test concrete.
Through the steps, the water absorption of the concrete can be quickly and accurately calculated.
It is to be noted that i in the present embodiment is equal to or greater than 6, that is, the number of time intervals Ti is preferably at least six. And, when said i is equal to 6, the time intervals are, in order, 1 minute, 2 minutes, 3 minutes, 4 minutes, 5 minutes and 6 minutes, respectively, i.e. 1 minute for T1, 2 minutes for T2, 3 minutes for T3, 4 minutes for T4, 5 minutes for T5 and 6 minutes for T6. And the working time corresponding to each time interval is 1 minute, 3 minutes, 6 minutes, 10 minutes, 15 minutes and 21 minutes
And through the steps, the testing time can be greatly reduced, the testing time of the water absorption of the concrete is shortened from 265 minutes to 21 minutes in the prior art, and the method has high operability and remarkable economic and social benefits. Obviously, the working time in the present embodiment is not limited to the above 21 minutes, and may be designed to have other time values, such as 30 minutes, 40 minutes, 50 minutes, 60 minutes, etc., according to the requirement.
Further preferably, as shown in fig. 7, in order to make the calculated water absorption rate more reasonable, the step S402 of sequentially dividing the operating time into a plurality of time intervals according to a preset dividing rule to determine the water absorption amounts corresponding to the time intervals, includes:
step S4021: dividing the working time into a plurality of time intervals according to a preset division rule;
step S4022: and observing the scale indication number of the liquid level of the corresponding water injection pipe 1 at each time interval to determine the water absorption amount corresponding to each time interval.
Further preferably, the step of sequentially dividing the working time into a plurality of time intervals according to a preset dividing rule, that is, step S4021 specifically includes: the working time is divided into a plurality of time intervals which are arranged in sequence according to an increasing rule, and the sum of the time intervals is equal to the working time.
It follows that the time intervals are divided in an incremental manner, so that the resulting water absorption can be better distributed linearly, thereby facilitating the evaluation of its performance. In addition, it is worth mentioning that the difference between two adjacent time intervals in this embodiment is distributed and increased in an integer greater than 1.
Further preferably, as shown in fig. 6, in order to meet the testing and installation requirements in practical applications, the step of connecting the other end of the water filling pipe 1 with the pressurizing device 5 in this embodiment, that is, step S30, includes:
s301, injecting a preset water quantity into the water injection pipe 1;
and S302, when the water quantity injected into the water injection pipe 1 reaches the zero-position liquid level scale 13, communicating the pressurizing device 5 through a rubber hose 3, wherein the pressurizing device 5 is a pressurizing pump electrically connected with a main control device.
In addition, it is worth mentioning that the sealant in the embodiment preferably adopts silica gel or epoxy resin, so as to improve the sealing performance thereof, and meanwhile, the sealant has good hydrophobicity, so as to avoid an overlarge error caused by the calculation of the water absorption amount.
In addition, it should be mentioned that the water injection pipe in this embodiment may preferably be tap water or seawater according to actual requirements.
Further preferably, the pressure of the pressurizing pump in the embodiment is preferably controlled to be 0.8MPa, so as to avoid the phenomenon that the structure of the concrete and the water injection pipe 1 is damaged due to the overlarge pressure, and the water absorption rate is inaccurate.
To better explain the comparison between the water absorption calculated by the method used in the present example and the water absorption obtained by the conventional method, the comparison results are as follows:
TABLE 1 Water absorption test results for silane-impregnated concrete of different strength grades
As can be seen from Table 1, the test results obtained by the rapid test method of the present invention are relatively close to those obtained by the prior art method of drilling core samples, and therefore, the present invention can rapidly and effectively measure the water absorption of silane-impregnated concrete.
Example two
A second embodiment provides a method for testing water absorption of silane-impregnated concrete, which is substantially the same as the above embodiments, except that in this embodiment, as shown in fig. 9 and 10, the operating time is sequentially divided into a plurality of time intervals according to a preset division rule to determine water absorption amounts corresponding to the time intervals, that is, step S402 includes:
step S4021': measuring the liquid level height of the water injection pipe in real time through a liquid level meter 6 preset in the water injection pipe, and calculating to obtain water volume change data according to a preset liquid level area formula;
step S4022': dividing the working time into a plurality of time intervals according to a preset division rule;
step S4023': and obtaining the water absorption amount corresponding to each interval time according to each time interval and the water amount change data.
Through the steps, the automatic monitoring and calculation of the water absorption capacity can be realized, the detection efficiency is effectively improved, and the labor cost is reduced.
In addition, it is worth mentioning that, in order to meet the actual assembly requirement, as shown in fig. 9, the liquid level meter 6 is arranged above the zero-position liquid level scale 13 of the water injection pipe before the other end of the water injection pipe is connected with the pressurizing device, and the liquid level meter 6 and the pressurizing device are electrically connected with the main control device; wherein the liquid surface area formula is 0.25 pi D2(ii) a Wherein D is the diameter of the cylindrical portion 12 of the water injection pipe 1.
Further preferably, the step of calculating the water absorption rate a according to the water absorption capacity, the operating time and the water absorption calculation formula, that is, the step S403, is specifically:
and the main control device calculates the water absorption rate a according to the water absorption capacity, the working time and the water absorption calculation formula.
Through the steps, the automatic calculation of the water absorption rate a can be realized, so that the test efficiency is accelerated.
In addition, it should be noted that the main control device in this embodiment may be a control terminal such as a single chip, a computer, or a controller.
The above embodiments are merely to illustrate the technical solution of the present invention, not to limit the same, and the present invention has been described in detail with reference to the preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made without departing from the spirit and scope of the present invention and it is intended to cover the appended claims.
Claims (10)
1. A method for testing the water absorption of silane-impregnated concrete, which is characterized by comprising the following steps:
determining a test area of concrete to be tested;
arranging one end of a water injection pipe on the test area, and forming a water injection space isolated from the outside above the test area;
connecting the other end of the water injection pipe with a pressurizing device;
and calculating the water absorption of the concrete according to the water quantity change in the water injection pipe and the working time of the pressurizing device.
2. The test method for silane impregnated concrete water absorption according to claim 1 further comprising, prior to the step of determining a test area for the concrete to be tested:
selecting concrete with different strength grades to manufacture concrete members with set volume;
after the concrete member is manufactured and waits for a preset time, impregnating the concrete member with silane with a preset concentration and drying the concrete member;
marking a test area of the concrete to be tested on the concrete member.
3. The method for testing water absorption of silane-impregnated concrete according to claim 1, wherein the step of placing one end of a water injection pipe on the test area so that a water injection space isolated from the outside can be formed above the test area further comprises:
manufacturing a water injection pipe by adopting a glass material; wherein, the water injection pipe includes: the device comprises a cover body part for covering the test area, and a cylindrical part which is communicated with the cover body part and is provided with zero liquid level scales; the wall thickness of the water injection pipe is 2-3 mm; the volume of the water quantity which can be injected by the water injection pipe is 4mL or 10 mL; the bottom area of the cap body portion is the same as the test area.
4. The method for testing water absorption of silane-impregnated concrete according to claim 2, wherein the step of disposing one end of a water injection pipe on the test area so that a water injection space isolated from the outside can be formed above the test area comprises:
one end of the water injection pipe is attached to the surface of the concrete, so that the area positioned in the water injection pipe can form the test area;
and sealing the connecting part of the water injection pipe and the concrete by using a sealant so as to form the water injection space.
5. The method of claim 1, wherein the step of calculating the water absorption of the concrete based on the change in the amount of water in the water injection pipe and the operating time of the pressurizing device comprises:
operating the pressurizing device according to the set operating time;
according to a preset division rule, dividing the working time into a plurality of time intervals in sequence to determine the water absorption capacity corresponding to each time interval;
calculating according to the water absorption capacity, the time interval and a water absorption calculation formula to obtain the water absorption of the concrete;
the above-mentioned
The above-mentioned
The above-mentioned
Wherein a is the concrete water absorption rate; the i is a natural number; the T isiIs the ith time interval; said HiIs the amount of water absorbed per unit area of the test area in the ith time interval.
6. The method as claimed in claim 5, wherein the preset division rule is used to divide the working time into a plurality of time intervals in sequence, and the step of determining the water absorption amount corresponding to each time interval is:
dividing the working time into a plurality of time intervals according to a preset division rule;
and observing the scale indication number of the liquid level of the corresponding water injection pipe at each time interval to determine the water absorption amount corresponding to each time interval.
7. The method for testing the water absorption of the silane-impregnated concrete according to claim 5, wherein the step of sequentially dividing the working time into a plurality of time intervals according to a preset division rule to determine the water absorption amount corresponding to each time interval comprises the following steps:
measuring the liquid level height of the water injection pipe in real time through a liquid level meter preset in the water injection pipe, and calculating to obtain water volume change data according to a preset liquid level area formula;
dividing the working time into a plurality of time intervals according to a preset division rule;
and obtaining the water absorption amount corresponding to each interval time according to each time interval and the water amount change data.
8. The method for testing the water absorption of silane-impregnated concrete according to claim 7, wherein the liquid level meter is arranged above a zero level scale of the water injection pipe before the other end of the water injection pipe is connected with the pressurizing device, and the liquid level meter and the pressurizing device are electrically connected with a main control device; wherein the liquid surface area formula is 0.25 pi D2(ii) a Wherein D is the diameter of the cylindrical part of the water injection pipe.
9. The method for testing the water absorption of silane-impregnated concrete according to claim 6 or 7, wherein the step of sequentially dividing the working time into a plurality of time intervals according to a preset division rule is embodied as;
dividing the working time into a plurality of time intervals which are arranged in sequence according to an increasing rule, wherein the sum of the time intervals is equal to the working time; wherein i is greater than or equal to 6, and when i is equal to 6, the time intervals are 1 minute, 2 minutes, 3 minutes, 4 minutes, 5 minutes, and 6 minutes, respectively, in this order.
10. The method for testing water absorption of silane-impregnated concrete according to claim 3, wherein the step of connecting the other end of the water injection pipe with a pressurizing means comprises:
injecting a preset water quantity into the water injection pipe;
and when the water quantity injected into the water injection pipe reaches the zero-position liquid level scale, the water injection pipe is communicated with the pressurizing device through a rubber hose, wherein the pressurizing device is a pressurizing pump electrically connected with a main control device.
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