CN107255696A - The cement content detection method of coring sample after a kind of pre-pouring grout construction - Google Patents
The cement content detection method of coring sample after a kind of pre-pouring grout construction Download PDFInfo
- Publication number
- CN107255696A CN107255696A CN201710606820.9A CN201710606820A CN107255696A CN 107255696 A CN107255696 A CN 107255696A CN 201710606820 A CN201710606820 A CN 201710606820A CN 107255696 A CN107255696 A CN 107255696A
- Authority
- CN
- China
- Prior art keywords
- cement
- cement content
- sample
- soil
- detection method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses the cement content detection method of coring sample after a kind of construction of pre-pouring grout, it the described method comprises the following steps：1st step, drafting cement content examination criteria curve；2nd step, measure coring sample cement content；Wherein, the standard curve is the relation curve of cement content and ammonium chloride consumption.(1) the method for the invention can detect the cement content of any position in stratum after mortar depositing construction, the accurate slip casting effect for judging any position, provide foundation for supplement slip casting, reach the purpose of control stratum settlement；(2) the method for the invention is easy to operate, accuracy is high, cost is low, sampling amount is small.
Description
Technical field
The invention belongs to detection field after constructing, it is related to a kind of detection of grouting effects method, specially a kind of pre-pouring grout is applied
The cement content detection method of coring sample after work.
Background technology
When reinforcing service channel using engineering with artificial freezing method in soft layer subway work, formation strength and stably can be increased
Property, effectively isolation underground water is contacted with underground engineering.But after construction freezing method, surrounding formation can produce frost heave, thaw collapse phenomenon, make
Obtain soil body engineering properties and adjacent buildings are adversely affected.Stratum settlement, slip casting are typically controlled by the way of pre-pouring grout
Position is selected to rely on engineering experience mostly, and engineering controllability is poor.Slip casting is not in place to be often led on during later stage metro operation
Downlink produces differential settlement, causes severe compromise, therefore need to be by detecting slip casting effect guiding construction.
Using physical method the inspection of current slip casting effect more, such as radar detection, borehole imaging, dynamic sounding in situ,
The modes such as resistivity reflect grout mixing and effect, require high to laboratory apparatus and operation.
The content of the invention
The technical problem of solution：In order to overcome the defect of prior art, a kind of note for being applied to judge any position is obtained
Effect, and the detection method that easy to operate, accuracy is high, cost is low, sampling amount is small are starched, is applied the invention provides a kind of pre-pouring grout
The cement content detection method of coring sample after work.
Technical scheme：The cement content detection method of coring sample after a kind of pre-pouring grout construction, methods described includes following
Step：
1st step, drafting cement content examination criteria curve；
2nd step, measure coring sample cement content；
Wherein, the standard curve is the relation curve of cement content and ammonium chloride consumption.
It is preferred that, it is described to draw comprising the following steps that for cement content examination criteria curve：
(1) undisturbed soil taken out with scene and the cement mortar prepared make the cement soil sample of 7 concentration gradients；
(2) cement soil sample is placed in baking oven, takes out, pulverize after drying；
(3) the soil cement powder for taking step (2) grinding to obtain, plus pure water stirring, stand, take upper suspension, centrifuge；
(4) take step (3) centrifuge after supernatant, add phenolphthalein reagent, be titrated to ammonium chloride solution colourless, record disappears
Consumption, after the completion of 7 sample titration, draws the relation curve of cement content and ammonium chloride consumption.
It is preferred that, the equation of linear regression of the cement content examination criteria curve is：Y=38.726x-0.3957.
It is preferred that, the cement content detection range of step (1) reclaimed water soil sample is 4.5%~21.3%.
It is preferred that, the ratio of mud of the cement mortar is 1:1.2.
It is preferred that, it is described to determine concretely comprising the following steps for coring sample cement content：
(1) cement soil sample to be measured after pre-pouring grout construction is taken, is placed in baking oven, takes out, pulverizes after drying；
(2) the soil cement powder for taking step (1) grinding to obtain, plus pure water stirring, stand, take upper suspension, centrifuge；
(3) take step (2) centrifuge after supernatant, add phenolphthalein reagent, be titrated to ammonium chloride solution colourless, record disappears
Consumption, sample cement content is calculated according to cement content examination criteria curve.
Beneficial effect：(1) the method for the invention can detect the cement content of any position in stratum after mortar depositing construction,
The accurate slip casting effect for judging any position, provides foundation for supplement slip casting, reaches the purpose of control stratum settlement；(2) this hair
Bright methods described is easy to operate, accuracy is high, cost is low, sampling amount is small.
Brief description of the drawings
Fig. 1 is the cement content examination criteria curve map of embodiment 1；
Fig. 2 is the cement content examination criteria curve map of embodiment 2.
Embodiment
Following examples further illustrate present disclosure, but should not be construed as limiting the invention.Without departing substantially from
In the case of spirit and essence of the invention, the modification and replacement made to the inventive method, step or condition belong to the present invention
Scope.Unless otherwise specified, the conventional meanses that technological means used in embodiment is well known to those skilled in the art.
Embodiment 1
The cement content detection method of coring sample, the described method comprises the following steps after a kind of pre-pouring grout construction：
1st step, drafting cement content examination criteria curve；
2nd step, measure coring sample cement content；
Wherein, the standard curve is the relation curve of cement content and ammonium chloride consumption.
It is described to draw comprising the following steps that for cement content examination criteria curve：
(1) undisturbed soil taken out with scene and the cement mortar prepared make the cement soil sample of 7 concentration gradients, respectively
For 4.5%, 8.2%, 10.3%, 13.9%, 16.1%, 18.1%, 21.3%；The meaning of wherein cement content is：Cementaceous
Original state soil property amount is 100g in amount/undisturbed soil and cement gross mass, each sample, and cement uses 32.5R composite Portland cements,
The ratio of mud of cement mortar is 1:1.2, cement mortar is mixed after preparing with soil sample.Sample proportioning is as shown in table 1：
The sample of table 1 matches table
(2) cement soil sample is placed in 105 DEG C of baking ovens, processing is pulverized for 16 hours to taking-up after complete drying.
(3) the soil cement powder 20g for weighing step (2) grinding acquisition is put into beaker, plus 200mL pure water is with 120r/min
Speed stirring 3min, stand 5min, draw upper suspension 50mL be placed in centrifuge tube；Each beaker takes 3 groups, solid after centrifugation
Liquid is separated.
(4) the supernatant 40mL after step (3) centrifugation is taken, the phenolphthalein reagent that 0.1mL concentration is 1% is added, is with concentration
10% ammonium chloride solution is titrated to colourless, records the consumption of ammonium chloride, 3 consumptions of same sample average, and 7
After the completion of individual sample titration, the relation curve of cement content and ammonium chloride consumption is drawn.As shown in figure 1, cement content and chlorine
Change ammonium consumption linearly related, its linearly dependent coefficient is 0.9948.
The equation of linear regression of the cement content examination criteria curve is：Y=38.726x-0.3957.
It is described to determine concretely comprising the following steps for coring sample cement content：
(1) diverse location each 100g of cement soil sample to be measured after pre-pouring grout construction is taken, is placed in 105 DEG C of baking ovens, is taken after 16h
Go out, pulverize；
(2) the soil cement powder 20g for taking step (1) grinding to obtain, plus 200mL pure water are stirred with 120r/min speed
3min, stands 5min, takes upper suspension 50mL, centrifuges；
(3) the supernatant 40mL after step (2) centrifugation is taken, the phenolphthalein reagent that 0.1mL concentration is 1% is added, is with concentration
10% ammonium chloride solution is titrated to colourless, record consumption, and calculating sample cement according to cement content examination criteria curve contains
Amount.
Embodiment 2
Interval No. 2 Freezing Method for Cross-passage Construction in Nanjing peace inter-city rail transit first stage of the project Hua Xin way stations~oil mill bridge station are used
Engineering with artificial freezing method is reinforced, and is needed to carry out pre-pouring grout to soil layer before construction, is judged to note using the cement content detection method of coring sample
Effect is starched, be the described method comprises the following steps：
(1) undisturbed soil taken out with scene and the cement mortar prepared make the cement soil sample of 7 concentration gradients, respectively
For 4.5%, 8.2%, 10.3%, 13.9%, 16.1%, 18.1%, 21.3%；The meaning of wherein cement content is：Cementaceous
Original state soil property amount is 100g in amount/undisturbed soil and cement gross mass, each sample, and cement uses 32.5R composite Portland cements,
The ratio of mud of cement mortar is 1:1.2, cement mortar is mixed after preparing with soil sample.Sample proportioning is as shown in table 2：
The sample of table 2 matches table
(2) cement soil sample is placed in 105 DEG C of baking ovens, processing is pulverized for 16 hours to taking-up after complete drying.
(3) the soil cement powder 20g for weighing step (2) grinding acquisition is put into beaker, plus 200mL pure water is with 120r/min
Speed stirring 3min, stand 5min, draw upper suspension 50mL be placed in centrifuge tube；Each beaker takes 3 groups, solid after centrifugation
Liquid is separated.
(4) the supernatant 40mL after step (3) centrifugation is taken, the phenolphthalein reagent that 0.1mL concentration is 1% is added, is with concentration
10% ammonium chloride solution is titrated to colourless, records the consumption of ammonium chloride, 3 consumptions of same sample average, and 7
After the completion of individual sample titration, the relation curve of cement content and ammonium chloride consumption is drawn.As shown in Fig. 2 cement content and chlorine
Change ammonium consumption linearly related, its linearly dependent coefficient is 0.9933, the linear regression side of cement content examination criteria curve
Cheng Wei：Y=41.457x-0.6459.
(5) diverse location each 100g of cement soil sample to be measured after pre-pouring grout construction is taken, is placed in 105 DEG C of baking ovens, is taken after 16h
Go out, pulverize；
(6) the soil cement powder 20g for taking step (5) grinding to obtain, plus 200mL pure water are stirred with 120r/min speed
3min, stands 5min, takes upper suspension 50mL, centrifuges；
(7) the supernatant 40mL after step (6) centrifugation is taken, the phenolphthalein reagent that 0.1mL concentration is 1% is added, is with concentration
10% ammonium chloride solution is titrated to colourless, record consumption, and calculating sample cement according to cement content examination criteria curve contains
Amount.
Claims (5)
1. the cement content detection method of coring sample after a kind of pre-pouring grout construction, it is characterised in that methods described includes following
Step：
1st step, drafting cement content examination criteria curve；
2nd step, measure coring sample cement content；
Wherein, the standard curve is the relation curve of cement content and ammonium chloride consumption.
2. the cement content detection method of coring sample after a kind of pre-pouring grout construction according to claim 1, its feature exists
In described to draw comprising the following steps that for cement content examination criteria curve：
(1) undisturbed soil taken out with scene and the cement mortar prepared make the cement soil sample of 7 concentration gradients；
(2) cement soil sample is placed in baking oven, takes out, pulverize after drying；
(3) the soil cement powder for taking step (2) grinding to obtain, plus pure water stirring, stand, take upper suspension, centrifuge；
(4) supernatant after step (3) centrifugation is taken, phenolphthalein reagent is added, colourless, record consumption is titrated to ammonium chloride solution
Amount, after the completion of 7 sample titration, draws the relation curve of cement content and ammonium chloride consumption.
3. the cement content detection method of coring sample after a kind of pre-pouring grout construction according to claim 2, its feature exists
In the cement content detection range of step (1) reclaimed water soil sample is 4.5%~21.3%.
4. the cement content detection method of coring sample after a kind of pre-pouring grout construction according to claim 2, its feature exists
In the ratio of mud of the cement mortar is 1:1.2.
5. the cement content detection method of coring sample after a kind of pre-pouring grout construction according to claim 1, its feature exists
In described to determine concretely comprising the following steps for coring sample cement content：
(1) cement soil sample to be measured after pre-pouring grout construction is taken, is placed in baking oven, takes out, pulverizes after drying；
(2) the soil cement powder for taking step (1) grinding to obtain, plus pure water stirring, stand, take upper suspension, centrifuge；
(3) supernatant after step (2) centrifugation is taken, phenolphthalein reagent is added, colourless, record consumption is titrated to ammonium chloride solution
Amount, sample cement content is calculated according to cement content examination criteria curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710606820.9A CN107255696A (en) | 2017-07-24 | 2017-07-24 | The cement content detection method of coring sample after a kind of pre-pouring grout construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710606820.9A CN107255696A (en) | 2017-07-24 | 2017-07-24 | The cement content detection method of coring sample after a kind of pre-pouring grout construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107255696A true CN107255696A (en) | 2017-10-17 |
Family
ID=60026517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710606820.9A Pending CN107255696A (en) | 2017-07-24 | 2017-07-24 | The cement content detection method of coring sample after a kind of pre-pouring grout construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107255696A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983138A (en) * | 2020-08-27 | 2020-11-24 | 矿冶科技集团有限公司 | Mine cemented filling slurry proportion inspection method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063802A (en) * | 2012-12-31 | 2013-04-24 | 清华大学 | Potentiometric titration determination method of cemented sand gravel cement content |
| CN104634690A (en) * | 2014-09-17 | 2015-05-20 | 四川鑫统领建材科技有限公司 | Method for determining cement content of building mortar |
-
2017
- 2017-07-24 CN CN201710606820.9A patent/CN107255696A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063802A (en) * | 2012-12-31 | 2013-04-24 | 清华大学 | Potentiometric titration determination method of cemented sand gravel cement content |
| CN104634690A (en) * | 2014-09-17 | 2015-05-20 | 四川鑫统领建材科技有限公司 | Method for determining cement content of building mortar |
Non-Patent Citations (1)
| Title |
|---|
| 余明东 主编: "《土木工程检测实训指导书》", 31 May 2016, 武汉大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983138A (en) * | 2020-08-27 | 2020-11-24 | 矿冶科技集团有限公司 | Mine cemented filling slurry proportion inspection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ghirian et al. | Coupled thermo-hydro-mechanical–chemical behaviour of cemented paste backfill in column experiments: Part II: Mechanical, chemical and microstructural processes and characteristics | |
| Aldhafeeri et al. | Sulphate induced changes in the reactivity of cemented tailings backfill | |
| CN108166994B (en) | A kind of construction method of the grouting reinforced region applied to water-rich sand layer shield tunnel | |
| CN202494442U (en) | Stratum layering and settlement measuring device | |
| CN107842374B (en) | The novel inert slurry of shield and combination grouting process for upper soft lower hard water rich strata | |
| CN205246388U (en) | Mud sampling equipment | |
| CN105115624B (en) | A kind of floor undulation gushing water thermo parameters method formula method of testing | |
| CN103644892A (en) | Measuring device and method for layered settlement of soil body of deep foundation pit | |
| CN107255696A (en) | The cement content detection method of coring sample after a kind of pre-pouring grout construction | |
| Liu et al. | Construction techniques and quality test and evaluation of lightweight cellular concrete mixed with fly ash as subgrade material | |
| Ghafari | Corrosion control in underground concrete structures using double waterproofing shield system (DWS) | |
| CN111075460A (en) | Shield construction and monitoring method for urban dense building | |
| CN114607418A (en) | Fine deformation control grouting process for deep-buried large-section tunnel | |
| CN104931678B (en) | Mine cemented filling slurry segregation degree detection and evaluation method | |
| CN102373718A (en) | Method for determining diameter of high-pressure rotary jet grouting pile based on circular free turbulent jet theory | |
| CN106194257B (en) | A method of in the open-air pit bottom tailing disposal lotion of activity sedimentation | |
| Yang et al. | Layered Grouting Technology Based on a Comprehensive Water‐to‐Cement Ratio for the Overlying Loess Stratum of Urban Shallow Tunnels | |
| Turner et al. | Treatment of fractured concrete via microbially induced carbonate precipitation: From micro-scale characteristics to macro-scale behaviour | |
| CN111441399B (en) | Method for detecting strength of beaded karst cave after grouting | |
| CN103940721B (en) | One newly mixes cellular concrete material porosity rapid assay methods | |
| SI et al. | Key technologies for tunnel construction in water rich sand in ground of soil and rock strata | |
| CN107064413A (en) | The detection method of Water glass content in a kind of waterglass conditioned soil | |
| Lifeng et al. | Intelligent diagnosis technology and service status evaluation of rail transit tunnel | |
| CN203605940U (en) | Measuring device for soil layered settlement of soil bodies in deep foundation pit | |
| CN113008736B (en) | Method for testing gradual loss of fluidity of grouting slurry laminar flow cone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171017 |
|
| RJ01 | Rejection of invention patent application after publication |