CN111844358A - Method for manufacturing cement test block in cement continuous wall construction - Google Patents
Method for manufacturing cement test block in cement continuous wall construction Download PDFInfo
- Publication number
- CN111844358A CN111844358A CN202010540108.5A CN202010540108A CN111844358A CN 111844358 A CN111844358 A CN 111844358A CN 202010540108 A CN202010540108 A CN 202010540108A CN 111844358 A CN111844358 A CN 111844358A
- Authority
- CN
- China
- Prior art keywords
- cement
- stirring
- test block
- slurry
- bentonite
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C3/00—Apparatus or methods for mixing clay with other substances
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a method for manufacturing cement test blocks in cement continuous wall construction, which comprises the following steps: firstly, combining materials prepared in the construction site, performing test selection on the bentonite slurry proportion, and ensuring that the colloid rate is more than 95% and the viscosity is between 20 and 30s after the slurry is kept stand for 24 hours when the bentonite mixing amount is 5%; preparing bentonite slurry according to the selected proportion of the test, standing for 24h, and fully hydrating and fermenting; preparing cement paste according to a certain determined water-cement ratio; taking undisturbed soil and remolding the undisturbed soil; stirring the undisturbed soil, adding bentonite slurry while stirring, and stirring for 3-5 min; after stirring, slowly adding cement paste, and stirring for 3-5 min again; pouring the mixture into a grinding tool after stirring to manufacture a test block; after the test block is manufactured, a high-quality test block is selected for carrying out compression resistance and impermeability tests. The method can fully simulate the cement forming process in the cement continuous wall construction, brings convenience to project construction, and achieves economic, reasonable and practical effects.
Description
Technical Field
The invention relates to a method for manufacturing a cement test block, in particular to a method for manufacturing a cement test block in the construction of a cement-soil continuous wall.
Background
A double-wheel milling deep stirring (CSM Cutter Soil Mixing) process is an innovative deep stirring construction method. The process is derived from a double-wheel cutting and milling technology of German national treasure Emei company, and is a novel geotechnical engineering construction technology which is innovated by combining the existing hydraulic slot milling machine and a deep stirring technology. The construction site in-situ soil body and the cement slurry are stirred, so that the construction site in-situ soil body can be used for projects such as impervious walls, retaining walls, foundation reinforcement and the like. Due to the fact that construction time may be longer than cement slurry setting time, for example: the geological conditions are complex and the wall forming depth is deep. The stirring head is used for drilling while pumping slurry which is not solidified, such as bentonite slurry, and participates in cutting, stirring, liquefying and homogenizing the soil in the early stage, and the content of the bentonite directly influences the cement setting time. It is therefore necessary to simulate cement test blocks. In view of the long-term development of urban underground engineering, the foundation reinforcement task is bound to be more and more. Therefore, a method for manufacturing a cement test block in the construction of the cement continuous wall needs to be provided.
Disclosure of Invention
The invention provides a method for manufacturing cement test blocks in cement continuous wall construction, which aims to solve the problems in the background technology.
In order to achieve the purpose, the technical scheme of the invention is as follows: a method for manufacturing a cement test block in the construction of a cement continuous wall comprises the following steps:
(1) the bentonite slurry proportion is tested and selected by combining materials prepared in the construction site, and the colloid rate is more than 95% and the viscosity is 20-30 s after the slurry is kept stand for 24 hours when the bentonite mixing amount is 5%;
(2) preparing bentonite slurry and standing for 24 hours for full hydration fermentation;
(3) preparing cement paste according to the determined water-cement ratio;
(4) taking undisturbed soil and remolding the undisturbed soil;
(5) stirring undisturbed soil, adding bentonite slurry while stirring, and stirring for 3-5 min;
(6) after stirring, slowly adding cement paste, and stirring for 3-5 min again;
(7) pouring the mixture into a grinding tool after stirring to manufacture a test block;
(8) after the test block is manufactured, a high-quality test block is selected for carrying out compression resistance and impermeability tests.
In the process, 15 percent of cement is mixed, the water cement ratio is 1.5, and the cement is added into water to be stirred for standby.
The invention has the beneficial effects that:
(1) the bentonite material is selected firstly, and the bentonite material meeting the actual requirement is selected by testing the performance parameters of slurry viscosity, specific gravity, PH, colloid rate and the like. Prevent the manufacturing of the cement test block from being influenced by the performance difference of the raw materials.
(2) The invention adds water to the undisturbed soil for remodeling, periodically tests the water content of the undisturbed soil, supplements water in time through testing the water content in the experimental process, and prevents the influence on experimental data caused by the volatilization of the water in the soil body.
(3) According to the invention, the bentonite slurry is slowly added while stirring, and stirred for 3-5 min, so that the bentonite slurry is fully and uniformly mixed. Slowly adding the prepared cement slurry, and stirring for 3-5 min.
(4) After the cement test block is manufactured, the initial setting time is known by observing the appearance phenomenon of the cement test block. And the test block state is known in time, and the test block which meets the test block manufacturing requirement is transferred to a curing room for curing in time. And carrying out compression resistance and impermeability tests on the high-quality test block.
Detailed Description
The invention is further illustrated by the following examples.
The method for manufacturing the cement test block in the cement continuous wall construction comprises the following steps:
(1) primarily screening out a bentonite material A and a bentonite material B, and detecting performance parameters such as slurry viscosity, specific gravity, PH, colloid rate and the like through a laboratory to select the bentonite material which better meets the test block manufacturing requirement.
(2) The bentonite is pre-prepared before extraction, stirred uniformly and fully dissolved, and kept stand for 24 hours to fully ferment. And (3) stirring the remolded undisturbed soil, slowly adding the bentonite slurry while stirring, stirring for 3-5 min, and fully and uniformly mixing.
(3) Adding 15% of cement and 1.5% of water cement into water, and stirring for later use. Slowly adding the mixture into the step (2) and stirring the mixture for 3 to 5min at the rotating speed of 600r/min to uniformly mix the mixture.
(4) Pouring the cement into a mold, making a test block, and observing the performance change of the cement test block in different time periods.
(5) After the test block is manufactured, a high-quality test block is selected for a compression resistance and impermeability test.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (2)
1. A method for manufacturing cement soil test blocks in cement soil continuous wall construction is characterized by comprising the following steps:
(1) the bentonite slurry proportion is tested and selected by combining materials prepared in the construction site, and the colloid rate is more than 95% and the viscosity is 20-30 s after the slurry is kept stand for 24 hours when the bentonite mixing amount is 5%;
(2) preparing bentonite slurry and standing for 24 hours for full hydration fermentation;
(3) preparing cement paste according to the determined water-cement ratio;
(4) Taking undisturbed soil and remolding the undisturbed soil;
(5) stirring undisturbed soil, adding bentonite slurry while stirring, and stirring for 3-5 min;
(6) after stirring, slowly adding cement paste, and stirring for 3-5 min again;
(7) pouring the mixture into a grinding tool after stirring to manufacture a test block;
(8) after the test block is manufactured, a high-quality test block is selected for carrying out compression resistance and impermeability tests.
2. The method for manufacturing the cement test block in the cement continuous wall construction according to claim 1, which is characterized in that: in the process, 15 percent of cement is mixed, the water cement ratio is 1.5, and the cement is added into water to be stirred for standby.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010540108.5A CN111844358B (en) | 2020-06-12 | 2020-06-12 | Method for manufacturing cement test block in cement continuous wall construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010540108.5A CN111844358B (en) | 2020-06-12 | 2020-06-12 | Method for manufacturing cement test block in cement continuous wall construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111844358A true CN111844358A (en) | 2020-10-30 |
| CN111844358B CN111844358B (en) | 2022-07-05 |
Family
ID=72987407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010540108.5A Active CN111844358B (en) | 2020-06-12 | 2020-06-12 | Method for manufacturing cement test block in cement continuous wall construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111844358B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB766918A (en) * | 1954-08-24 | 1957-01-30 | Johns Manville | Improvements in or relating to manufacture of heat insulating shapes, e.g. boards or the like |
| CN1776112A (en) * | 2005-11-30 | 2006-05-24 | 王平 | High-performance cement soil continuous wall construction method |
| CN106866056A (en) * | 2017-04-05 | 2017-06-20 | 中铁八局集团第四工程有限公司 | A kind of mud for construction of diaphragm wall and preparation method thereof |
| CN107524138A (en) * | 2016-06-20 | 2017-12-29 | 宏润建设集团股份有限公司 | A kind of ultra-deep foundation pit construction method of underground continuous wall |
| CN109322311A (en) * | 2018-10-11 | 2019-02-12 | 鼎宸建设管理有限公司 | Assembled support construction technique based on coercion underground continuous wall structure |
| CN110306531A (en) * | 2019-07-06 | 2019-10-08 | 中铁二十五局集团第五工程有限公司 | High water level erratic boulder stratum construction of diaphragm wall technique |
-
2020
- 2020-06-12 CN CN202010540108.5A patent/CN111844358B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB766918A (en) * | 1954-08-24 | 1957-01-30 | Johns Manville | Improvements in or relating to manufacture of heat insulating shapes, e.g. boards or the like |
| CN1776112A (en) * | 2005-11-30 | 2006-05-24 | 王平 | High-performance cement soil continuous wall construction method |
| CN107524138A (en) * | 2016-06-20 | 2017-12-29 | 宏润建设集团股份有限公司 | A kind of ultra-deep foundation pit construction method of underground continuous wall |
| CN106866056A (en) * | 2017-04-05 | 2017-06-20 | 中铁八局集团第四工程有限公司 | A kind of mud for construction of diaphragm wall and preparation method thereof |
| CN109322311A (en) * | 2018-10-11 | 2019-02-12 | 鼎宸建设管理有限公司 | Assembled support construction technique based on coercion underground continuous wall structure |
| CN110306531A (en) * | 2019-07-06 | 2019-10-08 | 中铁二十五局集团第五工程有限公司 | High water level erratic boulder stratum construction of diaphragm wall technique |
Non-Patent Citations (1)
| Title |
|---|
| 唐昊陵: "膨润土对SMC水泥土搅拌墙工程特性影响", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111844358B (en) | 2022-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111995339A (en) | Anti-scouring solidified soil for ocean platform and preparation method thereof | |
| CN102021906A (en) | Method for reinforcing soft soil foundation at deep mixing pile | |
| CN109293323B (en) | Grouting reinforcement material for treating road diseases and preparation method thereof | |
| CN112030940B (en) | Construction process of in-situ premixed cement soil cast-in-place pile of marine soft soil | |
| CN102775106A (en) | Recyclable red brick sand premixed dry mortar and manufacturing method thereof | |
| CN105130349B (en) | A kind of base pit engineering water-stop curtain material based on industrial residue | |
| CN101603427A (en) | Shield synchronization slip casting construction technology | |
| CN102808427A (en) | Composite grouting reinforcement anti-seepage treatment technology | |
| CN105016675B (en) | A kind of preparation method of the high additive scrap glass powder self-compacting mortar with good volume stability | |
| CN113929365A (en) | Self-compacting solidified soil and use method thereof | |
| CN112592138A (en) | Single-component active synchronous mortar with controllable setting time and preparation method thereof | |
| CN101597497A (en) | Water glass-triacetyl glycerine grouting material and preparation method thereof | |
| CN102505944B (en) | Water sealing method for replacing mud in freezing holes with slow setting cement grout | |
| CN111844358B (en) | Method for manufacturing cement test block in cement continuous wall construction | |
| CN112592112A (en) | Self-compacting and curing loess fertilizer tank backfill material and backfill method | |
| CN114315243B (en) | Environment-friendly self-compacting premixed concrete and production process thereof | |
| CN101723640A (en) | Road engineering base course and soil road base polymer grouting material | |
| CN105367016B (en) | A kind of adjustable ungauged regions grouting slurries of performance and its preparation method | |
| CN113045252B (en) | Environment-friendly wall protection slurry for underground continuous wall and preparation method thereof | |
| CN109336521A (en) | The injection slurry and preparation method thereof of construction is pushed away suitable for shield sky | |
| CN110372309A (en) | A kind of titanium gypsum sill and preparation method thereof for goaf filling | |
| CN113089747A (en) | Fertilizer groove backfilling construction method based on self-compacting backfilled soil | |
| CN114133151A (en) | Steel slag-doped low-carbon cementing material capable of solidifying soft soil and use method thereof | |
| CN101906779B (en) | Supporting process of portal frame type anchor pipe soil nail spraying net and modified reinforcing cement mortar employed by same | |
| CN105036628A (en) | Slurry with time-variable viscosity and preparation method thereof |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |