CN116768594B - Prefabricated diaphragm wall combined self-setting slurry and preparation method thereof - Google Patents
Prefabricated diaphragm wall combined self-setting slurry and preparation method thereof Download PDFInfo
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- 239000002002 slurry Substances 0.000 title claims abstract description 87
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 238000007613 slurry method Methods 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000000843 powder Substances 0.000 claims abstract description 34
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 25
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000004575 stone Substances 0.000 claims abstract description 19
- 239000002893 slag Substances 0.000 claims abstract description 17
- 239000000701 coagulant Substances 0.000 claims abstract description 13
- 239000012024 dehydrating agents Substances 0.000 claims abstract description 13
- 239000011398 Portland cement Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- 235000013162 Cocos nucifera Nutrition 0.000 claims description 16
- 244000060011 Cocos nucifera Species 0.000 claims description 16
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 16
- 229920001273 Polyhydroxy acid Polymers 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 9
- 125000002091 cationic group Chemical group 0.000 claims description 9
- 229920002401 polyacrylamide Polymers 0.000 claims description 9
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 239000003607 modifier Substances 0.000 claims 1
- 238000002156 mixing Methods 0.000 abstract description 15
- 238000003756 stirring Methods 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 12
- 239000004115 Sodium Silicate Substances 0.000 abstract description 11
- 229910052911 sodium silicate Inorganic materials 0.000 abstract description 11
- 239000003469 silicate cement Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000011049 filling Methods 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 13
- 239000002245 particle Substances 0.000 description 11
- 238000010276 construction Methods 0.000 description 9
- 230000005484 gravity Effects 0.000 description 8
- 239000004576 sand Substances 0.000 description 8
- 239000004568 cement Substances 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 239000000440 bentonite Substances 0.000 description 5
- 229910000278 bentonite Inorganic materials 0.000 description 5
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 239000004567 concrete Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000004927 clay Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 235000012054 meals Nutrition 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- 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
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application discloses prefabricated wall-connected combined self-setting slurry and a preparation method thereof, wherein the prefabricated wall-connected combined self-setting slurry comprises the following raw materials in parts by weight: 300-330 parts of Portland cement, 70-100 parts of stone powder, 500-700 parts of blast furnace slag, 20-30 parts of alkaline regulator, 150-250 parts of sodium water glass, 2-10 parts of coagulant, 5-20 parts of dehydrating agent and 50-100 parts of water reducer. The preparation method of the self-setting slurry comprises the following steps: adding silicate cement, stone powder, blast furnace slag and a water reducing agent into a stirrer for stirring and mixing, and then adding an alkaline regulator, sodium silicate, a coagulant and a dehydrating agent into the stirrer for stirring and mixing to prepare the prefabricated diaphragm wall combined self-setting slurry. The self-setting slurry prepared by the method can fill the gaps and cracks in the wall, so that a layer of hard filling layer is formed in the wall, and the effects of cracking resistance and increasing the strength of the wall are achieved.
Description
Technical Field
The application relates to the technical field of building materials, in particular to prefabricated wall-connected combined self-setting slurry and a preparation method thereof.
Background
The diaphragm wall is used as an enclosure structure of underground engineering and is widely applied to deep foundation pit engineering. The underground diaphragm wall can be used as a temporary soil-retaining and water-stopping structure, and can replace an outdoor wall of the underground diaphragm wall to form a permanent underground structure, and the underground diaphragm wall has high rigidity, is easy to arrange buried members, and is very suitable for reverse construction; the wall body has high rigidity, can bear great soil pressure when being used for foundation pit excavation, rarely has foundation settlement or collapse accidents, and becomes an indispensable soil retaining structure in deep foundation pit supporting engineering. The prefabricated underground continuous wall technology is to insert prefabricated wall sections, prefabricated piles, section steel, steel pipes or other prefabricated components into slurry after the prefabricated underground continuous wall is formed according to the conventional construction method, then to replace the prefabricated wall protection slurry for the trough with self-setting slurry, or to insert the prefabricated components directly into the trough with slurry protection wall, to fill the gaps behind the wall with the setting body of the self-setting slurry and prevent the water from leaking from the gaps between the components, so as to form the underground continuous wall.
The bentonite has good physical and chemical properties, strong hygroscopicity and expansibility, and plasticity and cohesiveness with the admixture of water, mud or fine sand, and is favorable for forming a compact block structure to strengthen the strength of a wall body or a prefabricated part when applied to the wall protection slurry, so the bentonite is widely applied to the construction of a diaphragm wall, and the main component of the wall protection slurry adopted in the actual engineering construction is the bentonite. However, the wall protection slurry using bentonite often permeates into the wall body due to strong water absorption of the bentonite in construction of the underground continuous wall, so that the formed wall protection slurry is softened, the overall strength of the wall body is reduced, workers are required to check the wall surface regularly, labor is consumed, and the efficiency is low.
Therefore, there is a need for a wall-protecting slurry with excellent mechanical properties to better meet the use requirements.
Disclosure of Invention
In order to solve at least one technical problem, a self-setting slurry with high strength and proper viscosity is developed, and the application provides a prefabricated underground continuous wall combined self-setting slurry and a preparation method thereof.
On one hand, the prefabricated wall-connected combined self-setting slurry provided by the application comprises the following raw material components in parts by weight: 300-330 parts of Portland cement, 70-100 parts of stone powder, 500-700 parts of blast furnace slag, 20-30 parts of alkaline regulator, 150-250 parts of sodium water glass, 2-10 parts of coagulant, 5-20 parts of dehydrating agent and 50-100 parts of water reducer.
By adopting the technical scheme, the prefabricated diaphragm wall combined self-setting slurry prepared by the method is favorable for forming a compact block structure to strengthen the mechanical strength of a wall body or a prefabricated member. Specifically, the magnesium aluminum silicate and the coconut shell powder added in the application can improve the overall mechanical strength of the slurry flexural strength and the compressive strength, because the specific surface area of the magnesium aluminum silicate and the coconut shell powder is larger than that of the slurry, the particle size of the particles is smaller than that of the slurry, the magnesium aluminum silicate and the coconut shell powder are filled in the gaps of a cement slurry matrix and an interface transition zone, so that the cement structure and the interface structure are more compact, the porosity and the pore diameter are reduced, the pore structure is improved, the overall mechanical strength of the slurry flexural strength and the compressive strength is improved, and the added water reducer can generate electrostatic repulsive force with the surface of cement particles, thereby effectively reducing the viscosity and the surface tension of the concrete, and improving the fluidity and the slump of self-setting slurry.
Optionally, the self-setting slurry further comprises 60-80 parts of coconut shell powder and 15-25 parts of magnesium aluminum silicate.
Optionally, the stone powder is calcium carbonate powder.
Optionally, the alkaline regulator is at least one of sodium carbonate or sodium hydroxide.
Optionally, an optionalThe sodium water glass comprises Na 2 O, water-soluble SiO 2 And water, the Na 2 O, the water-soluble SiO 2 And the mass ratio of the water is 1:2:2.
Optionally, the coagulant is polyaluminum chloride, wherein Al in the polyaluminum chloride 2 O 3 The weight percentage content of (2) is more than 28wt%.
Optionally, the dehydrating agent is cationic polyacrylamide, the molecular weight of the cationic polyacrylamide is 800-1000 ten thousand, and the ionic degree is 30% -35%.
Optionally, the water reducer is a polyhydroxy acid water reducer.
In a second aspect, the present application provides a method for preparing the prefabricated wall-connected composite self-setting slurry, including the following steps: s1, weighing raw materials according to parts by weight, and adding silicate cement, stone powder, blast furnace slag and a water reducer into a stirrer for stirring and mixing;
s2, adding an alkaline regulator, sodium silicate, a coagulant and a dehydrating agent into a stirrer, and stirring and mixing to prepare the prefabricated wall-connected combined self-setting slurry;
through adopting above-mentioned technical scheme, the prefabricated wall combination self-setting mud that even wall made of this application can fill inside space and the crack of wall body to form one deck hard filling layer in the wall body inside, and then play the waterproof, anticracking of reinforcing wall body and increase intensity's effect.
In summary, the present invention includes at least one of the following beneficial technical effects:
1. the prefabricated wall combined self-setting slurry prepared by the method is beneficial to forming a compact block structure to strengthen the mechanical strength of a wall body or a prefabricated member. Specifically, the magnesium aluminum silicate and the coconut shell powder added in the application can improve the overall mechanical strength of the slurry flexural strength and the compressive strength, because the specific surface area of the magnesium aluminum silicate and the coconut shell powder is larger than that of the slurry, the particle size of the particles is smaller than that of the slurry, the magnesium aluminum silicate and the coconut shell powder are filled in the gaps of a cement slurry matrix and an interface transition zone, so that the cement structure and the interface structure are more compact, the porosity and the pore diameter are reduced, the pore structure is improved, the overall mechanical strength of the slurry flexural strength and the compressive strength is improved, and the added water reducer can generate electrostatic repulsive force with the surface of cement particles, thereby effectively reducing the viscosity and the surface tension of the concrete, and improving the fluidity and the slump of self-setting slurry.
2. The prefabricated wall combined self-setting slurry prepared by the method can fill the gaps and cracks in the wall, so that a layer of hard filling layer is formed in the wall, and the waterproof, crack-resistant and strength-increasing effects of the wall are further enhanced.
Detailed Description
The present application is described in further detail below with reference to examples.
The application provides a prefabricated wall combination self-setting mud that even links, according to parts by weight, its raw materials component includes: 300-330 parts of Portland cement, 70-100 parts of stone powder, 500-700 parts of blast furnace slag, 20-30 parts of alkaline regulator, 150-250 parts of sodium water glass, 2-10 parts of coagulant, 5-20 parts of dehydrating agent and 50-100 parts of water reducer.
The prefabricated diaphragm wall combined self-setting slurry is prepared by the following method, and comprises the following steps of:
s1, weighing raw materials according to parts by weight, and adding silicate cement, stone powder, blast furnace slag and a water reducer into a stirrer for stirring treatment;
s2, adding the alkaline regulator, sodium silicate, the coagulant and the dehydrating agent into a stirrer, and stirring and mixing to obtain the prefabricated diaphragm wall combined self-setting slurry.
The preparation method of the sodium water glass comprises the following steps:
45kg of Na 2 O and 90kg of water-soluble SiO 2 Dissolving in 90kg tap water, stirring and mixing to obtain sodium silicate.
The raw materials used in the present application are all from commercial products, and specific manufacturers are shown in table 1.
TABLE 1
| Product(s) | Manufacturer' s |
| Polyaluminum chloride | Henan Dragon Water treatment Material Co., ltd |
| Cationic polyacrylamide | Wuhan Kamick technologies Co.Ltd |
| Polyhydroxy acid water reducer | KUNSHAN JINGKE MICRO-ELECTRONICS MATERIAL Co.,Ltd. |
| Stone powder | Changsha Jianglong chemical engineering Co., ltd |
| Na 2 O | Shanghai Miclin Biochemical technologies Co., ltd |
| Water-soluble SiO 2 | Shanghai Miclin Biochemical technologies Co., ltd |
| Portland cement | GANSU JINSHI CHEMICAL Co.,Ltd. |
| Blast furnace slag | GANSU JINSHI CHEMICAL Co.,Ltd. |
| Sodium hydroxide | SHANGHAI BOER CHEMICAL REAGENTS Co.,Ltd. |
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Examples 1 to 4
Example 1
The embodiment provides prefabricated wall-connected combined self-setting slurry, which comprises the following components in parts by weight: 300kg of Portland cement, 100kg of stone powder, 500kg of blast furnace slag, 20kg of sodium hydroxide, 150kg of sodium silicate, 2kg of polyaluminium chloride, 5kg of cationic polyacrylamide and 50kg of polyhydroxy acid water reducer.
The prefabricated diaphragm wall combined self-setting slurry is prepared by the following method, and comprises the following steps of:
s1, weighing raw materials according to parts by weight, and adding silicate cement, stone powder, blast furnace slag and a water reducer into a stirrer for stirring and mixing;
s2, adding the alkaline regulator, sodium silicate, the coagulant and the dehydrating agent into a stirrer, and stirring and mixing to obtain the prefabricated diaphragm wall combined self-setting slurry.
Example 2
The embodiment provides prefabricated wall-connected combined self-setting slurry, which comprises the following components in parts by weight: 330kg of Portland cement, 70kg of stone powder, 700kg of blast furnace slag, 20kg of sodium hydroxide, 250kg of sodium water glass, 10kg of polyaluminium chloride, 20kg of cationic polyacrylamide and 100kg of polyhydroxy acid water reducer.
The prefabricated diaphragm wall combined self-setting slurry is prepared by the following method, and comprises the following steps of:
s1, weighing raw materials according to parts by weight, and adding silicate cement, stone powder, blast furnace slag and a water reducer into a stirrer for stirring and mixing;
s2, adding the alkaline regulator, sodium silicate, the coagulant and the dehydrating agent into a stirrer, and stirring and mixing to obtain the prefabricated diaphragm wall combined self-setting slurry.
Example 3
The embodiment provides prefabricated wall-connected combined self-setting slurry, which comprises the following components in parts by weight: 325kg of Portland cement, 75kg of stone powder, 600kg of blast furnace slag, 20kg of sodium hydroxide, 200kg of sodium silicate, 5kg of polyaluminum chloride, 15kg of cationic polyacrylamide and 60kg of polyhydroxy acid water reducer.
The prefabricated diaphragm wall combined self-setting slurry is prepared by the following method, and comprises the following steps of:
s1, weighing raw materials according to parts by weight, and adding silicate cement, stone powder, blast furnace slag and a water reducer into a stirrer for stirring and mixing;
s2, adding the alkaline regulator, sodium silicate, the coagulant and the dehydrating agent into a stirrer, and stirring and mixing to obtain the prefabricated diaphragm wall combined self-setting slurry.
Example 4
The embodiment provides prefabricated wall-connected combined self-setting slurry, which comprises the following components in parts by weight: 320kg of Portland cement, 80kg of stone powder, 500kg of blast furnace slag, 20kg of sodium hydroxide, 200kg of sodium silicate, 5kg of polyaluminium chloride, 15kg of cationic polyacrylamide and 60kg of polyhydroxy acid water reducer.
The prefabricated diaphragm wall combined self-setting slurry is prepared by the following method, and comprises the following steps of:
s1, weighing raw materials according to parts by weight, and adding silicate cement, stone powder, blast furnace slag and a water reducer into a stirrer for stirring and mixing;
s2, adding the alkaline regulator, sodium silicate, the coagulant and the dehydrating agent into a stirrer, and stirring and mixing to obtain the prefabricated diaphragm wall combined self-setting slurry.
Comparative examples 1 to 3
Comparative example 1 differs from example 1 in that comparative example 1 does not have a polyhydroxy acid water reducing agent.
Comparative example 2
Comparative example 2 differs from example 1 in that the mass of the polyhydroxy acid water reducing agent in comparative example 2 was 40kg.
Comparative example 3
Comparative example 3 differs from example 1 in that the mass of sodium carboxymethylcellulose in comparative example 3 is 120kg.
Experimental detection
Detection item and detection method
The specific gravity, viscosity, sand content, water loss and pH value of the prefabricated wall-connected combined self-setting slurry are detected according to the national standard building foundation construction Specification (GB 51004-2015).
Specific gravity: the specific gravity of the slurry is the ratio of the weight of the slurry to the weight of the water in a specified volume, the greater the specific gravity of the slurry, the greater the pressure on the wall of the slurry, and the more stable the wall of the slurry, but if the specific gravity of the slurry is too large, the water in the slurry is increased due to the leakage of the water caused by the compression, so that the mud skin attached to the wall of the slurry is thickened and loosened, and the wall is not convenient to fix; meanwhile, the pouring quality of concrete is also affected; but also increases the power consumption of the mud circulation equipment due to poor flowability. Thus, the specific gravity of the slurry is 1.05 to 1.25 for the environment in which the underground diaphragm wall according to the present application is constructed.
Viscosity: measuring a physical quantity of the fluid viscosity, which is expressed as a flow resistance of the fluid; the viscosity is high, the capability of suspending soil residues and drilling cuttings is high, but the resistance to trench excavation is high, and the produced mud skin is thick; the viscosity is small, the capability of suspending soil slag and drill cuttings is weak, and the slurry leakage and sand flowing are prevented.
Sand content: refers to the percentage of the mass of sand in the concrete to the total mass of the sand and stone. The sand content is high, the viscosity is reduced, the capability of suspending soil residues and drill cuttings is weakened, soil residues and the like are easy to sink to the bottom of the tank, and the mechanical abrasion is increased.
Water loss: the water loss indicates the ability of the mud to lose water in the formation.
pH value: generally 7-9, pH >11, the mud will delaminate and lose the wall protection effect.
The test methods of specific gravity, viscosity, sand content, water loss and pH value of the prefabricated wall-connected composite self-setting slurry prepared in examples 1 to 4 and comparative examples 1 to 3 were used for performance test with reference to the standard of "building foundation construction Specification" (GB 51004-2015), and the test results are shown in Table 2.
TABLE 2
From the detection results in table 2, the prefabricated underground continuous wall combined self-setting slurry prepared by the method meets the performance requirements of the underground continuous wall in the national standard building foundation construction Specification (GB 51004-2015). Moreover, the prefabricated diaphragm wall combined self-setting slurry prepared in the embodiments 1-4 has the advantages of less water loss and better viscosity, which indicates that the slurry stability is reduced due to difficult water loss in the practical use, the stability and the recycling rate of the prefabricated diaphragm wall combined self-setting slurry are improved, and the risks of specific gravity reduction and obvious viscosity increase of the prefabricated diaphragm wall combined self-setting slurry due to high water loss in the use process are avoided. Moreover, the viscosity performance and water loss of example 4 are superior to those of other examples, and thus contribute to an improvement in slurry transport efficiency, and can be used as an optimal blending ratio for practical production.
Comparative example 1 has significantly increased viscosity and severely increased water loss rate, resulting in decreased mud stability, compared to example 1, in which the prepared prefabricated wall-pack self-setting mud has no raw material polyhydroxy acid water reducing agent.
Comparative example 2 and comparative example 3 are inferior to example 1 in both viscosity and water loss properties to the prefabricated wall pack self-setting slurry prepared in example 1.
Examples 5 to 7
Example 5 differs from example 1 in that the mass of sodium hydroxide in example 5 is 30kg.
Example 6 differs from example 1 in that the mass of sodium hydroxide in example 6 is 23kg.
Example 7 differs from example 1 in that the mass of sodium hydroxide in example 7 is 26kg.
The pH of the prefabricated diaphragm wall combined self-setting slurry prepared in example 1 and examples 5 to 7 was measured, and the measurement results are shown in Table 3.
TABLE 3 Table 3
From the detection results of Table 3, it is known that the use of sodium hydroxide as an alkaline regulator satisfies the performance requirements for underground diaphragm walls in the national standard of construction Specification for Foundation of building (GB 51004-2015). From the test results shown in table 3, the pH of example 1 was somewhat low, the edge angle of the clay particles might be positively charged, and after standing for a period of time, the slurry would tend to become larger due to the mutual attraction of the kaolin particles (the surface of the plate and the edge charges attract each other), and a large amount of free water was wrapped, resulting in thickening of the slurry, poor stability of the slurry, and easy precipitation. In comparison, the pH value of 9.1 is always used for negatively charging the edges of the clay particles, so that the situation that the clay particles are mutually attracted to form large particles due to the repulsion of the like poles can not occur, and the slurry suspension property is good as a whole.
Examples 8 to 10
Example 8 differs from example 1 in that example 8 also included coconut shell meal, wherein the coconut shell meal content was 80kg.
Example 9 differs from example 1 in that example 9 further comprises magnesium aluminum silicate, wherein the content of magnesium aluminum silicate is 80kg.
Example 10 differs from example 1 in that example 10 also included coconut shell powder and magnesium aluminum silicate, wherein the weight of the coconut shell powder was 60kg and the weight of the magnesium aluminum silicate was 20kg.
The flexural strength and the compressive strength of the prefabricated diaphragm wall combined self-setting slurry are detected according to the national standard GB175-2007 general Portland Cement.
Flexural strength: refers to the ultimate breaking stress of the material when the unit area bears bending moment.
Compressive strength: refers to the maximum stress value that the material can withstand under static pressure.
The test method of compressive strength and flexural strength of the prefabricated diaphragm wall combined self-setting slurry is referred to national standard GB175-2007 general Portland Cement, and the test results are shown in Table 4.
TABLE 4 Table 4
From the test results shown in Table 4, it is known that the mechanical properties of the slurry are improved by adopting the magnesium aluminum silicate and the coconut shell powder, and the quality requirements of national standard GB175-2007 general Portland Cement are met. Meanwhile, the compressive strength and the flexural strength of the slurry prepared from the magnesium aluminum silicate and the coconut shell powder are obviously higher than those of other embodiments. Therefore, the magnesium aluminum silicate and the coconut shell powder are selected, so that the synergistic effect of the magnesium aluminum silicate and the coconut shell powder can be exerted, and mud with more excellent mechanical properties is obtained.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (6)
1. The prefabricated wall-connected combined self-setting slurry is characterized by comprising the following raw materials in parts by weight: 300-330 parts of Portland cement, 70-100 parts of stone powder, 500-700 parts of blast furnace slag, 20-30 parts of alkaline regulator, 150-250 parts of sodium water glass, 2-10 parts of coagulant, 5-20 parts of dehydrating agent, 50-100 parts of water reducer,
60-80 parts of coconut shell powder and 15-25 parts of magnesium aluminum silicate;
the water reducer is a polyhydroxy acid water reducer.
2. The prefabricated wall combination self-setting slurry according to claim 1, wherein the stone powder is calcium carbonate powder.
3. The prefabricated wall combination self-setting slurry according to claim 1, wherein the alkaline modifier is at least one of sodium carbonate or sodium hydroxide.
4. The prefabricated wall combination self-setting slurry according to claim 1, wherein the sodium water glass comprises Na 2 O, water-soluble SiO 2 And water, the Na 2 O, the water-soluble SiO 2 And the mass ratio of the water is 1:2:2.
5. The prefabricated wall assembly self-setting slurry according to claim 1, wherein the coagulant is polyaluminum chloride, wherein Al in the polyaluminum chloride 2 O 3 The weight percentage content of (2) is more than 28wt%.
6. The prefabricated wall-connected combined self-setting slurry according to claim 1, wherein the dehydrating agent is cationic polyacrylamide, the molecular weight of the cationic polyacrylamide is 800-1000 ten thousand, and the ionic degree is 30% -35%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310767873.4A CN116768594B (en) | 2023-06-27 | 2023-06-27 | Prefabricated diaphragm wall combined self-setting slurry and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310767873.4A CN116768594B (en) | 2023-06-27 | 2023-06-27 | Prefabricated diaphragm wall combined self-setting slurry and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN116768594A CN116768594A (en) | 2023-09-19 |
| CN116768594B true CN116768594B (en) | 2024-02-02 |
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| CN202310767873.4A Active CN116768594B (en) | 2023-06-27 | 2023-06-27 | Prefabricated diaphragm wall combined self-setting slurry and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101130993A (en) * | 2007-07-16 | 2008-02-27 | 常州工学院 | Cut-off wall slurry material and wall building technique |
| 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 |
| CN109809787A (en) * | 2019-01-29 | 2019-05-28 | 崔平 | A kind of prefabricated grout material and its application method of diaphram wall body |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2889096B2 (en) * | 1993-09-07 | 1999-05-10 | 鹿島建設株式会社 | Manufacturing method of concrete underground wall |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101130993A (en) * | 2007-07-16 | 2008-02-27 | 常州工学院 | Cut-off wall slurry material and wall building technique |
| 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 |
| CN109809787A (en) * | 2019-01-29 | 2019-05-28 | 崔平 | A kind of prefabricated grout material and its application method of diaphram wall body |
Non-Patent Citations (2)
| Title |
|---|
| 护壁泥浆防渗墙的浆材配制与成墙工艺;代国忠;代璐;;路基工程(第03期);第47-49页 * |
| 深基坑地下连续墙护壁泥浆技术研究;张毅;甘璐;李红军;;施工技术(第19期);第48-50、55页 * |
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