CN107246989A - A kind of preparation method of laboratory grouting cement soil - Google Patents
A kind of preparation method of laboratory grouting cement soil Download PDFInfo
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- CN107246989A CN107246989A CN201710478714.7A CN201710478714A CN107246989A CN 107246989 A CN107246989 A CN 107246989A CN 201710478714 A CN201710478714 A CN 201710478714A CN 107246989 A CN107246989 A CN 107246989A
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- 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
- G01N1/36—Embedding or analogous mounting of samples
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- 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
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
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- Health & Medical Sciences (AREA)
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- Chemical & Material Sciences (AREA)
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- 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 present invention discloses a kind of preparation method of laboratory cement injection soil, and described cement injection soil is made up of soil, cement, water, broken into pieces after folk song is done first, crosses 2mm sieves, wet soil is configured by natural moisture content 25%；Then the soil configured is put into leaching in sealing vessel and puts a night；Then the cement of wet soil quality 20% is taken, cement mortar is tuned into by 0.5 ratio of mud, then the mixture of wet soil and cement mortar is poured into mixer is stirred；Then it is portion by 825g by mixture, weighs many parts；Every part of soil cement is placed in diameter 70mm, high 200mm cylindrical die, hit with compaction hammer under real 50.Finally obtained test block size is the present invention：Test block material disposably can be put in mould by diameter 70mm, high 100mm cylinders, disposably hit reality, formed the soil cement test block of good integrity, enhanced the globality of soil cement test block, reduce the quantity of Paraclase, improve the compression strength of soil cement.
Description
Technical field
The invention belongs to field of civil engineering, and in particular to a kind of preparation method of laboratory cement injection soil.
Background technology
Soil is a kind of ancient natural material, is made up of soil particle, pore water and gas three-phase, its mechanical property it is complicated by
Ambient influnence is larger.Soil body tensile capacity is poor, and anti-shake performance is low, is also easy to produce crack, the soil body compresses during compression, and these lack
Point have impact on application of the soil in some special dimensions.
With the development of science and technology, the native technology of cement injection turns into the native technology of the contemporary emerging reinforcement developed rapidly.Should
Item technology is spiked into cement as a kind of binder materials in soil, can improve the performance of soil from many aspects, greatly improves soil
Tensile strength, deformability, impact resistance.
With underground engineering, the sustainable health development of city railway, the reinforcing demand of subway surrounding soil, soil cement is stirred
The application for mixing stake is more and more extensive, because the test condition at scene is limited, test it is more be soil cement compression strength.It is domestic
Outer many scholar's research cement participates in influence of the factors such as ratio, the ratio of mud, moisture content to Compressive Strength of Soil-cement Mixture, in recent years
There is influence of the scholar's research test block size and dimension to soil cement intensity.
In studying above, the making of soil cement test block is all to divide the soil cement mixed and stirred according to soil test code requirement
It is fitted into mould for three times, its preparation method has the technical problems such as tomography, globality poor, so as to reduce the performance of soil cement.
The content of the invention
The present invention is carried out to solve the above problems, it is therefore intended that is solved above-mentioned soil cement test block and was being made
The technical problems such as tomography, interlaminar bonding be insecure occur in journey, soil cement test block is not occurred fault-layer-phenomenon, globality is more
By force, so as to obtain a kind of good integrity, high performance grouting cement soil.
The invention provides a kind of preparation method of laboratory cement injection soil, soil cement examination is prepared using soil and cement
Block, it is characterised in that comprise the following steps：
Step 1, after the folk song dry doubling is broken into pieces, sieving is configured to wet soil by natural moisture content 25%, in closing vessel
It is middle to stand；
Step 2, the wet soil that step 1 is obtained is taken, the ratio for being 0.5 according to cement is wet soil quality the 20%, ratio of mud
Example prepares cement injection soil；
Step 3, the disposable addition prefabricated mould of cement injection soil step 2 obtained, real obtain is hit by dropping hammer
Prefabricated test block；
Step 4, the prefabricated test block that step 3 is obtained is stripped and is put into indoor standard curing box and conserved, obtained
The soil cement test block.
Further, air drying condition is in step 1：Put soil into drying baker, temperature is 100 DEG C~110 DEG C, and drying 24 is small
When after take out.
Further, the time of repose of the wet soil in step 1 is 16h~18h；
Further, cement injection soil includes following preparation process in rapid 2 step by step：
Step 2-1, pours into mixer by the wet soil and stirs 2min；
Step 2-2, cement mortar is poured into mixer, obtains described after the wet soil and the cement mortar are stirred
Cement injection soil.
Further, more than 2 times of the soil cement test block height that the mold height in step 3 is prepared for needs.
Further, the standard curing time in step 4 is 28 days.
The effect of invention and effect
The preparation method of the laboratory cement injection soil of the present invention is high as a result of the soil cement test block than needing to prepare
High more than twice of mould is spent, and is disposably all put into cement soil material in mould, therefore, the soil cement examination finally given
There is obvious enhancing in terms of the globality of block, compression strength, with stable physico-mechanical properties.
Brief description of the drawings
Fig. 1 is that the soil cement test block made under the diameter 70mm in embodiments of the invention one, high 100mm mould is in kind
Figure；
Fig. 2 is that the soil cement test block made under the diameter 70mm in embodiments of the invention two, high 200mm mould is in kind
Figure.
Embodiment
In order that the technological means realized of the present invention is easy to understand with effect, with reference to embodiments and accompanying drawing to
Invention is specifically addressed.
Embodiment one：
A kind of preparation method of laboratory water slip casting soil, is realized by following steps：
Step 1, after folk song dry doubling is broken into pieces, 2mm sieves are crossed, the soil for then taking 15kg to sieve is matched somebody with somebody by natural moisture content 25%
Wet soil is made to fetch water 3.75kg, is stood in closing vessel；
Step 2, the wet soil that step 1 is obtained is taken, cement is the 20% of wet soil quality；The ratio of mud is 0.5 proportional arrangement water
Mud slip casting soil, cement injection soil includes following preparation process：
Step 2-1,2min is stirred by the wet soil after standing,
Step 2-2,5.625kg cement mortars are poured into mixer, and cement is obtained after wet soil and cement mortar are stirred
Slip casting soil；
Step 3, the disposable addition prefabricated mould of cement injection soil step 2 obtained, is hit by dropping hammer and obtains prefabricated in fact
Test block, prefabricated test block is made by the steps：
Step 3-1, weighs well mixed cement injection soil 825g, weighs 6 parts, respectively numbering 1,2,3,
Step 3-2, takes diameter 70mm, and high three, 100mm moulds smear the very thin all scholars of common white in mould inside respectively
Woods,
Step 3-3, divides equally three parts by the soil cement of numbering 1, is put into three times in diameter 70mm, high 100mm moulds, under
Before secondary blowing to hit real soil cement hit after dabbing processing, each blowing it is real 20 times, one day after the demoulding obtain prefabricated test block；Compile
Numbers 2,3 soil cement repeats the operating method of the soil cement of numbering 1；
Step 4, the prefabricated test block that step 3 is obtained is put into indoor standard curing box to conserve 28 days, obtains soil cement test block.
Embodiment two：
A kind of preparation method of laboratory water slip casting soil, is realized by following steps：
Step 1, after folk song dry doubling is broken into pieces, 2mm sieves are crossed, the soil for then taking 15kg to sieve is matched somebody with somebody by natural moisture content 25%
Wet soil is made to fetch water 3.75kg, is stood in closing vessel；
Step 2, the wet soil that step 1 is obtained is taken, cement is the 20% of wet soil quality；The ratio of mud is 0.5 proportional arrangement water
Mud slip casting soil, cement injection soil includes following preparation process：
Step 2-1,2min is stirred by the wet soil after standing,
Step 2-2,5.625kg cement mortars are poured into mixer, and cement is obtained after wet soil and cement mortar are stirred
Slip casting soil；
Step 3, the disposable addition prefabricated mould of cement injection soil step 2 obtained, is hit by dropping hammer and obtains prefabricated in fact
Test block, prefabricated test block is made by the steps：
Step 3-1, weighs well mixed cement injection soil 825g, weighs 6 parts, respectively numbering 4,5,6,
Step 3-2, diameter 70mm, high three, 200mm moulds smear the very thin all scholars of common white in mould inside respectively
Woods,
Step 3-3, the soil cement of numbering 4,5,6 is respectively put into three size diameter 70mm, high 200mm moulds, first
Surrounding is compacted, then hit the soil cement in each mould under real 50, is stripped after one day；
Step 4, the prefabricated test block that step 3 is obtained is put into indoor standard curing box to conserve 28 days, obtains soil cement test block.
Finally according to GB/T2611-1992《Testing machine generic specifications》, GB/T3722-1992《Hydraulic pressure is tried
Test machine》, it is anti-to the cement injection soil in embodiment one and embodiment two using the miniature control electronic-hydraulic servo pressure testing machines of SANS
Compressive Strength is measured, and compression strength average value is 13.6kN, size diameter 70mm in embodiment one after 28 days, in embodiment two
Compressive Strength of Soil-cement Mixture average value is 19.2KN.
The effect of embodiment and effect
Fig. 1 is the soil cement test block made under diameter 70mm, high 100mm mould, and Fig. 2 is diameter 70mm, high 200mm's
The soil cement test block made under mould.
It can be learnt from Fig. 1 and Fig. 2：There is obvious Paraclase in Fig. 1, and test block surface is smooth in Fig. 2, free from flaw.
The three pieces of test block external cracks that can be seen that from test block outward appearance in size diameter 70mm, high 100mm moulds are more, and have tight
The Paraclase of weight.Three pieces of test block surface smoothness in size diameter 70mm, high 200mm moulds are high, no Paraclase phenomenon.
Test block surface quality is observed using electron-microscope scanning instrument, the test block material caking ability in embodiment two is strong, globality is high.
In addition, the cement injection soil that the present invention finally gives, according to visual examination result, in test block without Paraclase；It is logical
Cross around the viewing test block of electron-microscope scanning instrument, longitudinal crack is few, and soil property and cement mix are uniform；By being tried without lateral spacing uniaxial compressive
Test, the soil cement test block pressure resistance intensity after 28 days is that 16.9KN-28.5KN, i.e. its compression strength are significantly improved；And the present invention
Simple production process, is easy to implement easy, and applicability is wide, and this method is particularly suitable for use in measuring grouting cement soil in laboratory
The experiment of every mechanical property.
In summary, the preparation method of a kind of laboratory cement injection of the invention soil, due to what is prepared using being higher than
The mould of soil cement test block dimensional height, greatly enhances soil cement test block globality, reduces the generation of soil cement Paraclase,
Therefore the soil cement test block compressive ultimate strength increase of final gained.
Above-mentioned embodiment is the preferred case of the present invention, is not intended to limit protection scope of the present invention.
Claims (6)
1. a kind of preparation method of laboratory cement injection soil, prepares soil cement test block, it is characterised in that bag using soil and cement
Include following steps：
Step 1, after the folk song dry doubling is broken into pieces, sieving is configured to wet soil by natural moisture content 25%, quiet in closing vessel
Put；
Step 2, the wet soil that step 1 is obtained is taken, the ratio for being 0.5 according to cement is wet soil quality the 20%, ratio of mud is matched somebody with somebody
Cement injection soil processed；
Step 3, the disposable addition prefabricated mould of cement injection soil step 2 obtained, is hit by dropping hammer and obtains prefabricated in fact
Test block；
Step 4, the prefabricated test block that step 3 is obtained is stripped and is put into indoor standard curing box and conserved, obtain described
Soil cement test block.
2. the preparation method of cement injection soil in laboratory according to claim 1, it is characterised in that：
Wherein, air drying condition is in the step 1：Put the soil into drying baker, temperature is 100 DEG C~110 DEG C, and drying 24 is small
When after take out.
3. the preparation method of cement injection soil in laboratory according to claim 1, it is characterised in that：
Wherein, the time of repose of the wet soil in the step 1 is 16h~18h.
4. the preparation method of cement injection soil in laboratory according to claim 1, it is characterised in that：
Wherein, cement injection soil includes following preparation process in the step 2：
Step 2-1, pours into mixer by the wet soil and stirs 2min；
Step 2-2, cement mortar is poured into mixer, and the cement is obtained after the wet soil and the cement mortar are stirred
Slip casting soil.
5. the preparation method of cement injection soil in laboratory according to claim 1, it is characterised in that：
Wherein, more than 2 times of the soil cement test block height that the mold height in the step 3 is prepared for needs.
6. the preparation method of cement injection soil in laboratory according to claim 1, it is characterised in that：
Wherein, the standard curing time in the step 4 is 28 days.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710478714.7A CN107246989A (en) | 2017-06-22 | 2017-06-22 | A kind of preparation method of laboratory grouting cement soil |
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| CN201710478714.7A CN107246989A (en) | 2017-06-22 | 2017-06-22 | A kind of preparation method of laboratory grouting cement soil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113310780A (en) * | 2021-05-25 | 2021-08-27 | 北京中煤矿山工程有限公司 | Preparation method of cement grouting soil block for laboratory |
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| CN1683916A (en) * | 2005-03-09 | 2005-10-19 | 湖南科技大学 | Intelligent concrete test block and its producing and use |
| CN104677708A (en) * | 2015-02-11 | 2015-06-03 | 绍兴文理学院 | Preparation method of nanometer cemented soil true-triaxial sample |
| CN104788053A (en) * | 2015-03-27 | 2015-07-22 | 山东科技大学 | Experimental method for preparing rubber particle concrete |
| CN205538394U (en) * | 2016-03-15 | 2016-08-31 | 中国电建集团华东勘测设计研究院有限公司 | Soil cement triaxial test's system appearance ware |
| CN205600922U (en) * | 2016-05-17 | 2016-09-28 | 洛阳理工学院 | Soil cement test block making devices |
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2017
- 2017-06-22 CN CN201710478714.7A patent/CN107246989A/en active Pending
Patent Citations (5)
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| CN1683916A (en) * | 2005-03-09 | 2005-10-19 | 湖南科技大学 | Intelligent concrete test block and its producing and use |
| CN104677708A (en) * | 2015-02-11 | 2015-06-03 | 绍兴文理学院 | Preparation method of nanometer cemented soil true-triaxial sample |
| CN104788053A (en) * | 2015-03-27 | 2015-07-22 | 山东科技大学 | Experimental method for preparing rubber particle concrete |
| CN205538394U (en) * | 2016-03-15 | 2016-08-31 | 中国电建集团华东勘测设计研究院有限公司 | Soil cement triaxial test's system appearance ware |
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| 魏建菊: "饱和粉细砂水泥土强度特性试验研究", 《建筑工程技术与设计》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113310780A (en) * | 2021-05-25 | 2021-08-27 | 北京中煤矿山工程有限公司 | Preparation method of cement grouting soil block for laboratory |
| CN113310780B (en) * | 2021-05-25 | 2023-06-13 | 北京中煤矿山工程有限公司 | Preparation method of laboratory cement grouting soil block |
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