CN103994938A - Method for rapid measurement of material water content and water absorption - Google Patents
Method for rapid measurement of material water content and water absorption Download PDFInfo
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- CN103994938A CN103994938A CN201310054061.1A CN201310054061A CN103994938A CN 103994938 A CN103994938 A CN 103994938A CN 201310054061 A CN201310054061 A CN 201310054061A CN 103994938 A CN103994938 A CN 103994938A
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Abstract
The invention discloses a method for rapid measurement of material water content and water absorption. Precise weighing and measurement of the gas content A% are carried out on a test material, and then the material water content and water absorption are calculated according to a formula as the following: the material water content and water absorption=(V-VW-A%*V-(Mtest/rho0)/[Mtest*(1/rhoW-1/rho0)]. Specifically, V is the volume of a sealed container, VW is the water volume under a finally water filled state, VW=(M2-M1)/rhoW, A% is the measured gas content, M is the mass of the sealed container, M1 is the mass of the material-loaded sealed container, M2 is the mass of the material-loaded sealed container filled with water, Mtest is the mass of the test material, Mtest=M1-M, rho0 is the density of the material under a saturated surface dry condition, and rhoW is the density of water. If the calculated data is a positive value, the data refers to the water, and if the calculated data is a negative value, the data refers to the water absorption of the test material.
Description
Affiliated field
Content of the present invention belongs to a kind of and measures the water percentage of material and the fast method of water-intake rate with By Measuring The Volume Density.When solid material (hereinafter to be referred as the material) water percentage not changing for the saturated rear volume of Quick Measurement water suction and water-intake rate, use, belong to the technical field that solid material water percentage and water-intake rate are measured.
Background technology
Solid material (hereinafter to be referred as material) can keep certain water very important containing the mensuration of the water cut of the aggregate of rate, especially Concrete Industry in the ordinary course of things.
Such as mixing station at mixed engineering concrete, often see the outdoor placements of material such as the stone that pile up like a mountain, sand, expose to the weather and drench with rain, the inside and outside water percentage difference of material is very large, when material water percentage can not respond match ratio requirement, the concrete strength of producing and endurance quality just produce very large difference.
At present in concrete production process, the water percentage of measuring aggregate has two kinds of methods: (1) is determined as oven drying method in advance, be to utilize dry wet comparative determination water content ratio of aggregate, first this material weighed, record quality when moisture, and then dry, after drying, place after normal temperature, material is weighed again, we deduct the quality after oven dry by the quality before drying like this, just obtain water cut, with water cut and when moisture the quality of material do contrast and draw water percentage.This method is as long as operation is careful, instrument is accurate, and result is very accurately.But this method is the mensuration in advance before concrete production, and needs the long period, therefore cannot reach the requirement of auto-compensation.This method is used still more general at present.The oven drying method time is long, drying plant temperature is higher, and the material of non-refractory will be out of shape, goes bad, variable color, density change, the material that can not heat for some, measuring this material, to have contained how much water just very inconvenient, and the water percentage of measuring so also can be accurate.The most important thing is that this method is the water percentage with over dry state.(2) on-line determination is to use water-containing rate analyzer to measure in concrete mixing plant production run, each tank concrete is controlled.On Chu section storehouse, be equipped with and measure probe, the water percentage input control system recording increases sand diminishing.On-line determination is generally used capacitance method and electric-resistivity method, and owing to affecting the many factors of electric capacity and resistance, therefore precision is lower, wherein material packing is maximum to its Accuracy.
When other materials is measured water percentage, online electrical measuring method precision is not fast not at a high speed yet yet.If we need the online water percentage of accurately measuring material of short time, above-mentioned two kinds of methods all can not meet test request.Therefore we have invented the water percentage with balance, gas content, software (optional) Quick Measurement material.
In concrete mix, material water percentage is uncertain, to construction quality, brings very serious harm, key state project especially, while causing structure to cave in regard to serious harm the forfeiture of national interests and security.
The present invention is not only for the Quick Measurement of concrete material water percentage and water-intake rate, and test specification is extensive.Any solid material that can not change for the saturated rear volume that absorbs water is used while measuring water percentage and water-intake rate.
Summary of the invention
In order accurately to measure water percentage or the water-intake rate of material in 2-3 minute, make measurement become easier, we will use balance, gas content and computer software (optional) to address this problem.
The problem that content of the present invention solves is such: by the test material (4) with certain water cut pack into known volume V can closed container (1) in, on closed container (1), be connected to pressure test device (2).During measurement, with balance (3) weigh up can closed container (1) mass M, being loaded on material (4) weighs up and can fill the mass M 1 after test material (4) by closed container (1), after again can closed container (1) filling water, weigh up mass M 2, mensuration is filled the air content A% in the closed container after water, can calculate material water percentage and water-intake rate according to formula.
After measuring, calculate water percentage or water-intake rate:
The water percentage of material or water-intake rate=(V-V
w-A% * V-(M
survey/ ρ
0)/[M
survey* (1/ ρ
w-1/ ρ
0)]
V
W＝(M2-M1)÷ρ
W
M
survey=M1-M
Wherein
V: the volume of closed container
V
w: the volume of the water while finally filling water
A%: the air content recording
M: quality that can closed container
M1: can pack the quality after material into by closed container
M2: can pack the quality after material topped up with water into by closed container
M
survey: the quality of test material
ρ
0: the density of test material under saturated dry surface
ρ
w: the density of water
If the data that calculate are on the occasion of being the water percentage of material, are the water-intake rate of material if the data that calculate are negative values.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the inventive method application
In schematic diagram
1, can closed container
2, pressure test device
3, balance
4, test material
Embodiment
By reference to the accompanying drawings content of the present invention is described as follows:
The method be by moisture test material (4) is packed into known volume V can closed container (1) in, on closed container (1), be connected to pressure test device (2).During measurement, with balance (3) weigh up can closed container (1) mass M, being loaded on test material (4) weighs up and can fill the mass M 1 after test material (4) by closed container (1), after again can closed container (1) filling water, weigh up mass M 2, mensuration is filled the air content A% in the closed container after water, can calculate material water percentage and water-intake rate according to formula.
The data acquisition of test calculates with formula, the water percentage of material or water-intake rate=(V-V
w-A% * V-(M
survey/ ρ
0)/[M
survey* (1/ ρ
w-1/ ρ
0)].Wherein, the volume that V is closed container, V
wthe volume of the water when finally filling water, V
w=(M2-M1) ÷ ρ
w, A% is the air content recording, M
surveyfor the quality of test material, M
survey=M1-M, ρ
0for the density of test material under saturated dry surface, ρ
wdensity for water.If the data that calculate are on the occasion of being the water percentage of test material, are the water-intake rate of test material if the data that calculate are negative values.
During measurement, can be by hand computation, draw test result, also can the mode by wired or wireless communication be connected with computer by content measurement data and balance weighing data, computer can calculate result after collecting content measurement data and balance weighing data moment, the more easy and convenient surveying work that completes soon.
Content measurement precision and balance weighing precision are higher, and the water percentage or the water-intake rate that calculate are more accurate.
Claims (4)
1. the method for a Quick Measurement material water percentage and water-intake rate: described method be by moisture test material (4) is packed into known volume V can closed container (1) in, on closed container (1), be connected to pressure test device (2).During measurement, with balance (3) weigh up can closed container (1) mass M, being loaded on test material (4) weighs up and can fill the mass M 1 after test material (4) by closed container (1), after again can closed container (1) filling water, weigh up mass M 2, mensuration is filled the air content A% in the closed container after water, can calculate material water percentage and water-intake rate according to formula.
2. the method for a kind of Quick Measurement material water percentage according to claim 1 and water-intake rate: the data acquisition that it is characterized in that test calculates with following formula, the water percentage of material or water-intake rate=(V-V
w-A% * V-(M
survey/ ρ
0)/[M
survey* (1/ ρ
w-1/ ρ
0)].Wherein, the volume that V is closed container, V
wthe volume of the water when finally filling water, V
w=(M2-M1) ÷ ρ
w, A% is the air content recording, M
surveyfor the quality of test material, M
survey=M1-M, ρ
0for the density of material under saturated dry surface, ρ
wdensity for water.If the data that calculate are on the occasion of being the water percentage of test material, are the water-intake rate of test material if the data that calculate are negative values.
3. the method for a kind of Quick Measurement material water percentage according to claim 1 and water-intake rate: content measurement data and balance weighing data can be brought by hand formula into and calculate, also can be connected with computer by the mode of wired or wireless communication, computer can calculate result after collecting content measurement data and balance weighing data moment, the more easy and convenient surveying work that completes soon.
4. the method for a kind of Quick Measurement material water percentage according to claim 1 and water-intake rate: the precision that content measurement and balance weigh is higher, and the water percentage testing out is more accurate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310054061.1A CN103994938A (en) | 2013-02-20 | 2013-02-20 | Method for rapid measurement of material water content and water absorption |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310054061.1A CN103994938A (en) | 2013-02-20 | 2013-02-20 | Method for rapid measurement of material water content and water absorption |
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| Publication Number | Publication Date |
|---|---|
| CN103994938A true CN103994938A (en) | 2014-08-20 |
Family
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|---|---|---|---|
| CN201310054061.1A Pending CN103994938A (en) | 2013-02-20 | 2013-02-20 | Method for rapid measurement of material water content and water absorption |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237076A (en) * | 2014-09-17 | 2014-12-24 | 北新集团建材股份有限公司 | Method for rapidly detecting water absorption of waterproof gypsum board core |
| CN104964892A (en) * | 2015-07-15 | 2015-10-07 | 济南四建（集团）有限责任公司 | Method for measuring pressure water absorption rate of haycite and method for reducing pressure slump loss of haycite concrete pump |
| CN108507898A (en) * | 2018-06-11 | 2018-09-07 | 中国神华能源股份有限公司 | A method of measuring ammonium nitrate-fuel oil mixture component ratio using the saturation oil absorbency of raw material |
| CN110987709A (en) * | 2019-12-13 | 2020-04-10 | 河海大学 | Method for rapidly predicting dry density, water content and water absorption of aerated concrete discharged from kettle |
| CN111426591A (en) * | 2020-04-08 | 2020-07-17 | 上海众材工程检测有限公司 | Method and system for detecting sealing performance of aluminum honeycomb product |
| CN113405939A (en) * | 2021-06-16 | 2021-09-17 | 国网新源控股有限公司 | Rapid detection device and detection method for aggregate water content |
| CN117074231A (en) * | 2023-07-17 | 2023-11-17 | 山东国材益新建筑科技有限公司 | Rapid detection method for solid content of wastewater slurry in green building construction |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237076A (en) * | 2014-09-17 | 2014-12-24 | 北新集团建材股份有限公司 | Method for rapidly detecting water absorption of waterproof gypsum board core |
| CN104237076B (en) * | 2014-09-17 | 2016-09-14 | 北新集团建材股份有限公司 | A kind of method of quick detection water-resistant gypsum board plate wicking absorbent rate |
| CN104964892A (en) * | 2015-07-15 | 2015-10-07 | 济南四建（集团）有限责任公司 | Method for measuring pressure water absorption rate of haycite and method for reducing pressure slump loss of haycite concrete pump |
| CN104964892B (en) * | 2015-07-15 | 2017-11-07 | 济南四建（集团）有限责任公司 | A kind of assay method of haydite pressure water absorption rate and the method for the lower slump-loss of reduction haydite concrete pump pressure |
| CN108507898A (en) * | 2018-06-11 | 2018-09-07 | 中国神华能源股份有限公司 | A method of measuring ammonium nitrate-fuel oil mixture component ratio using the saturation oil absorbency of raw material |
| CN110987709A (en) * | 2019-12-13 | 2020-04-10 | 河海大学 | Method for rapidly predicting dry density, water content and water absorption of aerated concrete discharged from kettle |
| CN110987709B (en) * | 2019-12-13 | 2021-04-27 | 河海大学 | Method for rapidly predicting dry density, water content and water absorption of aerated concrete discharged from kettle |
| CN111426591A (en) * | 2020-04-08 | 2020-07-17 | 上海众材工程检测有限公司 | Method and system for detecting sealing performance of aluminum honeycomb product |
| CN113405939A (en) * | 2021-06-16 | 2021-09-17 | 国网新源控股有限公司 | Rapid detection device and detection method for aggregate water content |
| CN113405939B (en) * | 2021-06-16 | 2022-11-15 | 国网新源控股有限公司 | Rapid detection method for moisture content of aggregate |
| CN117074231A (en) * | 2023-07-17 | 2023-11-17 | 山东国材益新建筑科技有限公司 | Rapid detection method for solid content of wastewater slurry in green building construction |
| CN117074231B (en) * | 2023-07-17 | 2024-02-13 | 山东国材益新建筑科技有限公司 | Rapid detection method for solid content of wastewater slurry in green building construction |
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Application publication date: 20140820 |