CN113735549B - Magnesium oxychloride cement-based double-liquid grouting material and preparation method thereof - Google Patents
Magnesium oxychloride cement-based double-liquid grouting material and preparation method thereof Download PDFInfo
- Publication number
- CN113735549B CN113735549B CN202111034137.5A CN202111034137A CN113735549B CN 113735549 B CN113735549 B CN 113735549B CN 202111034137 A CN202111034137 A CN 202111034137A CN 113735549 B CN113735549 B CN 113735549B
- Authority
- CN
- China
- Prior art keywords
- slurry
- powder
- grouting material
- parts
- water
- 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.)
- Active
Links
- 239000000463 material Substances 0.000 title claims abstract description 87
- 239000007788 liquid Substances 0.000 title claims abstract description 58
- IQYKECCCHDLEPX-UHFFFAOYSA-N chloro hypochlorite;magnesium Chemical compound [Mg].ClOCl IQYKECCCHDLEPX-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000004568 cement Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000002002 slurry Substances 0.000 claims abstract description 94
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 80
- 239000000843 powder Substances 0.000 claims abstract description 70
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 34
- 238000002156 mixing Methods 0.000 claims abstract description 34
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 28
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims abstract description 22
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims abstract description 22
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims abstract description 22
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910000402 monopotassium phosphate Inorganic materials 0.000 claims abstract description 21
- 235000019796 monopotassium phosphate Nutrition 0.000 claims abstract description 21
- 229910000403 monosodium phosphate Inorganic materials 0.000 claims abstract description 19
- 235000019799 monosodium phosphate Nutrition 0.000 claims abstract description 19
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 claims abstract description 19
- 229940050906 magnesium chloride hexahydrate Drugs 0.000 claims abstract description 16
- DHRRIBDTHFBPNG-UHFFFAOYSA-L magnesium dichloride hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-] DHRRIBDTHFBPNG-UHFFFAOYSA-L 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims description 19
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 7
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 239000006227 byproduct Substances 0.000 claims description 4
- 239000000047 product Substances 0.000 claims description 4
- 238000009851 ferrous metallurgy Methods 0.000 claims description 3
- GNSKLFRGEWLPPA-UHFFFAOYSA-M potassium dihydrogen phosphate Chemical compound [K+].OP(O)([O-])=O GNSKLFRGEWLPPA-UHFFFAOYSA-M 0.000 abstract description 8
- LWIHDJKSTIGBAC-UHFFFAOYSA-K potassium phosphate Substances [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract description 5
- 230000002787 reinforcement Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 2
- 239000000654 additive Substances 0.000 abstract description 2
- 230000000996 additive effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 8
- 238000003860 storage Methods 0.000 description 8
- 229910019142 PO4 Inorganic materials 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 235000021317 phosphate Nutrition 0.000 description 7
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 6
- 230000002035 prolonged effect Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000011056 performance test Methods 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 229960002337 magnesium chloride Drugs 0.000 description 3
- 229910001629 magnesium chloride Inorganic materials 0.000 description 3
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011268 mixed slurry Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- PALNZFJYSCMLBK-UHFFFAOYSA-K magnesium;potassium;trichloride;hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-].[Cl-].[K+] PALNZFJYSCMLBK-UHFFFAOYSA-K 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/30—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing magnesium cements or similar cements
- C04B28/32—Magnesium oxychloride cements, e.g. Sorel cement
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of building engineering reinforcement, and particularly relates to a magnesium oxychloride cement-based two-liquid grouting material and a preparation method thereof. The double-liquid grouting material is formed by mixing a slurry A and a slurry B in equal volume, wherein the slurry A is formed by mixing light-burned magnesium oxide powder, a first water reducing agent, hydroxypropyl methyl cellulose and water, and the slurry B is formed by mixing magnesium chloride hexahydrate, monopotassium phosphate, sodium dihydrogen phosphate, a second water reducing agent, hydroxypropyl methyl cellulose and water. The magnesium oxychloride cement-based two-liquid grouting material fully utilizes the early strength characteristic of magnesium oxychloride cement, and achieves the effect of quick setting and hardening through the action of the additive. The double-liquid grouting material can be adjusted and shortened to be within 1min in initial setting time and within 3min in final setting time according to engineering requirements, and the compressive strength can reach 10MPa in 2 h.
Description
Technical Field
The invention belongs to the technical field of building engineering reinforcement, and particularly relates to a magnesium oxychloride cement-based two-liquid grouting material and a preparation method thereof.
Background
The grouting in the building engineering can realize the purposes of reinforcing surrounding rocks, blocking water and the like. Grouting materials can be divided into inorganic grouting materials and chemical grouting materials according to the chemical composition of the grouting material; according to the construction mode of the grouting material, the grouting material can be divided into a single-liquid grouting material, a double-liquid grouting material or a three-liquid grouting material. The double-liquid or three-liquid grouting material can fulfill the aims of quick reinforcement, water shutoff and the like on the premise of meeting construction requirements, and is particularly suitable for exposed surrounding rock bodies. At present, most of commonly used two-fluid grouting materials are polyurethane grouting materials, and the polyurethane grouting materials have the characteristics of quick setting and quick hardening, have good cohesiveness, but also have the defects of high cost, expansion when meeting water and the like.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to provide a magnesium oxychloride cement-based two-liquid grouting material and a preparation method thereof, and aims to solve the problems that the existing inorganic two-liquid grouting material is poor in construction performance, difficult to regulate and control the setting time and the like.
In order to achieve the purpose, the invention provides the following technical scheme:
the magnesium oxychloride cement-based double-liquid grouting material is formed by mixing slurry A and slurry B in equal volume; wherein:
the slurry A consists of powder A and water in a weight ratio of powder A to water =100 to (35-50);
the powder A consists of the following raw materials in parts by weight: 95-98 parts of light-burned magnesia powder, 1-3 parts of a water reducing agent I and 0.5-2 parts of hydroxypropyl methyl cellulose;
the slurry B consists of powder B and water in a weight ratio of powder B to water =100 to (35-50);
the powder B consists of the following raw materials in parts by weight: 60 to 80 parts of magnesium chloride hexahydrate, 10 to 20 parts of monopotassium phosphate, 10 to 20 parts of sodium dihydrogen phosphate, 3 to 5 parts of water reducing agent II and 0.5 to 2 parts of hydroxypropyl methyl cellulose.
In the above-mentioned magnesium oxychloride cement-based two-liquid grouting material, preferably, the light-burned magnesia powder is light-burned magnesia of grade of CBM85 or above in table 1 of YB/T5206-2004 of ferrous metallurgy industry standard.
In the above-mentioned magnesium oxychloride cement-based two-liquid grouting material, preferably, the specific surface area of the light-burned magnesia powder is not less than 400m 2 /kg。
In the above magnesium oxychloride cement-based two-liquid grouting material, preferably, the first water reducing agent and the second water reducing agent are both commercially available naphthalene powder water reducing agents.
In the above magnesium oxychloride cement-based two-liquid grouting material, preferably, the water reducing rates of the first water reducing agent and the second water reducing agent are both not less than 20%.
In the above-mentioned magnesium oxychloride cement-based two-liquid grouting material, preferably, mgCl in the magnesium chloride hexahydrate 2 ·6H 2 The mass content of O is not less than 85%.
In the above magnesium oxychloride cement-based two-fluid grouting material, preferably, the potassium dihydrogen phosphate is a qualified product in table 1 of "fertilizer-grade potassium dihydrogen phosphate" HG/T2321-2016 of the chemical industry standard and above.
In the above-mentioned magnesium oxychloride cement-based two-fluid grouting material, preferably, the sodium dihydrogen phosphate is a product meeting the requirements in table 1 of "by-product sodium dihydrogen phosphate" Q/371426LS 006-2016 of texas long-life chemical limited enterprise standard.
In the above-mentioned magnesium oxychloride cement-based two-pack grouting material, the viscosity of the 2% aqueous solution of hydroxypropylmethylcellulose is preferably 10 to 20 ten thousand mPa · s.
The invention also provides a preparation method of the magnesium oxychloride cement-based two-liquid grouting material, which comprises the following steps:
step one, weighing corresponding raw materials according to the weight parts of the powder A and the powder B, and uniformly mixing to obtain the powder A and the powder B respectively;
step two, uniformly mixing the powder A component and water in proportion to prepare slurry A; uniformly mixing the powder component B and water in proportion to prepare slurry B;
and step three, uniformly mixing the slurry A and the slurry B according to the same volume to obtain the magnesium oxychloride cement-based double-liquid grouting material.
Has the advantages that:
the magnesium oxychloride cement-based two-liquid grouting material fully utilizes the early strength characteristic of magnesium oxychloride cement, and achieves the effect of quick setting and hardening through the action of the additive. Meanwhile, the single-liquid storage time of the double-liquid grouting material is not less than 6h, the slurry fluidity is good, the slurry fluidity can reach 300mm, the initial setting time of the double-liquid grouting material can be adjusted and shortened to be within 1min, the final setting time can be adjusted and shortened to be within 3min according to engineering requirements, and the 2h compressive strength can reach 10MPa. Moreover, the preparation method of the magnesium oxychloride cement-based two-liquid grouting material is simple and easy to implement, has low requirements on production equipment and personnel, has a short production period, does not generate three wastes in the whole process, and does not influence the environment.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived from the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.
In order to further improve the system of the grouting material, the invention researches and develops the magnesium oxychloride cement-based two-liquid grouting material so as to achieve the aims of meeting the construction requirement, realizing quick reinforcement or water plugging and the like.
The magnesium oxychloride cement-based two-liquid grouting material is formed by mixing slurry A and slurry B in equal volume; wherein, the A slurry consists of A powder and water according to the weight ratio of A powder to water =100 to (35-50) (such as 100: 35, 100: 40, 100: 45 or 100: 50), and the B slurry consists of B powder and water according to the weight ratio of B powder to water =100 to (35-50) (such as 100: 35, 100: 40, 100: 45 or 100: 50);
the powder A consists of the following raw materials in parts by weight: 95 to 98 parts (such as 95 parts, 96 parts, 97 parts or 98 parts) of light-burned magnesia powder, 1 to 3 parts (such as 1 part, 1.5 parts, 2 parts, 2.5 parts or 3 parts) of water reducing agent, 0.5 to 2 parts (such as 0.5 part, 1 part, 1.5 parts or 2 parts) of hydroxypropyl methyl cellulose;
the powder B consists of the following raw materials in parts by weight: 60 to 80 parts (for example, 60 parts, 65 parts, 70 parts, 75 parts or 80 parts) of magnesium chloride hexahydrate, 10 to 20 parts (for example, 10 parts, 12 parts, 14 parts, 16 parts or 20 parts) of potassium dihydrogen phosphate, 10 to 20 parts (for example, 10 parts, 12 parts, 14 parts, 16 parts or 20 parts) of sodium dihydrogen phosphate, 3 to 5 parts (for example, 3 parts, 3.5 parts, 4 parts, 4.5 parts or 5 parts) of a water reducing agent, and 0.5 to 2 parts (for example, 0.5 part, 1 part, 1.5 parts or 2 parts) of hydroxypropylmethylcellulose.
It can be understood that the first water reducing agent and the second water reducing agent can be the same or different, and the invention does not need to be specially required. In the following examples, both water reducing agents are the same and therefore are not distinguished and are referred to as "water reducing agents".
In the magnesium oxychloride cement-based two-liquid grouting material, the main chemical component of the light-burned magnesia powder is MgO, and the light-burned magnesia powder is mixed with MgCl in a magnesium chloride aqueous solution 2 (provided by magnesium chloride hexahydrate) and H 2 O reaction to produce 5Mg (OH) 2 ·MgCl 2 ·8H 2 O and 3Mg (OH) 2 ·MgCl 2 ·8H 2 O crystal phase, thereby forming a relatively dense and hard hardened body; the potassium dihydrogen phosphate and the sodium dihydrogen phosphate have the function of accelerating the hardening of the magnesium oxychloride cement, namely shortening the setting time of the magnesium oxide powder and the magnesium chloride aqueous solution, and can improve the water resistance of the magnesium oxychloride cement; the water reducing agent can improve the fluidity of the slurry; the hydroxypropyl methyl cellulose can adjust the viscosity of the slurry, and avoids the segregation phenomenon when the fluidity is high.
The light-burned magnesia powder is light-burned magnesia which meets the grade of CBM85 and above (namely the grades are CBM85 to CBM 96) in the ferrous metallurgy industry standard YB/T5206-2004 table 1, and the specific surface area of the light-burned magnesia powder isNot less than 400m 2 /kg。
The water reducing agent is a commercial naphthalene powder water reducing agent, and the water reducing rate is not less than 20%.
The hydroxypropylmethylcellulose is commercially available white powdery hydroxypropylmethylcellulose and has a viscosity of 10 to 20 ten thousand mPas (viscosity of a 2% aqueous solution by mass, for example, 10 to 12, 14, 16 or 20 ten thousand mPas).
Magnesium chloride hexahydrate as carnallite (KMgCl) 3 ·6H 2 O) and a by-product of KCl extraction, and MgCl 2 ·6H 2 The mass content of O is not less than 85%.
The monopotassium phosphate is monopotassium phosphate which meets the standard of chemical industry, namely fertilizer-grade monopotassium phosphate HG/T2321-2016, and is qualified and above in the grade shown in the table 1.
The sodium dihydrogen phosphate is a product meeting the requirements in the table 1 of the 'byproduct sodium dihydrogen phosphate' Q/371426LS 006-2016 of the industry Standard of Longsheng chemical Co., ltd.
The preparation method of the magnesium oxychloride cement-based two-liquid grouting material comprises the following steps:
firstly, weighing corresponding raw materials according to the weight parts of the powder A and the powder B, and uniformly mixing to respectively prepare the powder A and the powder B;
step two, uniformly mixing the powder A component and water according to the weight ratio of the powder A to the water =100 to (35-50) to prepare slurry A; uniformly mixing the powder B component and water according to the weight ratio of the powder B to the water = 100: 35-50 to prepare slurry B;
and step three, uniformly mixing the slurry A and the slurry B according to the same volume to obtain the magnesium oxychloride cement-based double-liquid grouting material.
Example 1
The magnesium oxychloride cement-based two-liquid grouting material of the embodiment is formed by mixing slurry A and slurry B according to a volume ratio of 1:1, wherein: the slurry A is prepared by mixing 970g of light-burned magnesia powder, 20g of water reducing agent, 10g of hydroxypropyl methyl cellulose and 380g of water, and the slurry B is prepared by mixing 660g of magnesium chloride hexahydrate, 150g of potassium dihydrogen phosphate, 150g of sodium dihydrogen phosphate, 30g of water reducing agent, 10g of hydroxypropyl methyl cellulose and 380g of water.
The preparation method of the magnesium oxychloride cement-based two-liquid grouting material comprises the following steps:
step one, weighing light-burned magnesium oxide, a water reducing agent and hydroxypropyl methyl cellulose according to the weight, and uniformly mixing to obtain powder A;
step two, weighing magnesium chloride hexahydrate, monopotassium phosphate, sodium dihydrogen phosphate, a water reducing agent and hydroxypropyl methyl cellulose according to the weight, and uniformly mixing to obtain powder B;
step three, mixing and stirring 1000g of powder A and 380g of water uniformly to obtain slurry A;
step four, mixing and stirring 1000g of the powder B and 380g of water uniformly to obtain slurry B;
and step five, uniformly mixing the slurry A and the slurry B according to the volume ratio of 1:1 to obtain the magnesium oxychloride cement-based two-liquid grouting material, and grouting by using a two-liquid grouting pump.
The sampling detection is as follows: the single-liquid storage time of the slurry A and the slurry B is respectively 6 hours 55min and 8 hours 30min, and the single-liquid fluidity of the slurry A and the slurry B is respectively 325mm and 335mm; the initial setting time of the mixed slurry is 55s, the final setting time is 2min19s, and the compressive strength of 2h is 11.2MPa.
The tests refer to the national standard GB8076-2008 'concrete admixture' to respectively test the single-liquid storage time, the single-liquid fluidity, the initial setting time and the final setting time of the double-liquid grouting material and the compressive strength. The detection methods in other examples and comparative examples are the same as those in this example, and are not described again.
Example 2
The magnesium oxychloride cement-based two-liquid grouting material is prepared by mixing slurry A and slurry B according to the volume ratio of 1:1, wherein: the slurry A is prepared by mixing 980g of light-burned magnesia powder, 15g of water reducing agent, 5g of hydroxypropyl methyl cellulose and 450g of water, and the slurry B is prepared by mixing 700g of magnesium chloride hexahydrate, 150g of potassium dihydrogen phosphate, 120g of sodium dihydrogen phosphate, 20g of water reducing agent, 10g of hydroxypropyl methyl cellulose and 450g of water.
The preparation method of the magnesium oxychloride cement-based two-liquid grouting material comprises the following steps:
step one, weighing light-burned magnesium oxide, a water reducing agent and hydroxypropyl methyl cellulose according to the weight, and uniformly mixing to obtain powder A;
weighing magnesium chloride hexahydrate, monopotassium phosphate, sodium dihydrogen phosphate, a water reducing agent and hydroxypropyl methyl cellulose according to the weight, and uniformly mixing to obtain powder B;
step three, mixing 1000g of powder A and 450g of water, and stirring uniformly to obtain slurry A;
step four, mixing 1000g of the powder B and 450g of water, and stirring uniformly to obtain slurry B;
and step five, uniformly mixing the slurry A and the slurry B according to the volume ratio of 1:1 to obtain the magnesium oxychloride cement-based two-liquid grouting material, and grouting by using a two-liquid grouting pump.
The sampling detection is as follows: the single-liquid storage time of the slurry A and the slurry B is respectively 7 hours and 30min and 9 hours and 50min, and the single-liquid fluidity of the slurry A and the slurry B is respectively 335mm and 345mm; the initial setting time of the mixed slurry is 1min15s, the final setting time is 2min50s, and the compressive strength of 2h is 10.8MPa.
Example 3
The difference between the magnesium oxychloride cement-based two-fluid grouting material of the embodiment and the embodiment 1 is that: the water addition amount for preparing slurry A and slurry B is different, and other parameters are the same as those in example 1, and are not described again. The water addition amount for the slurry a and the slurry B during the preparation (the water addition amount for the two slurries in each experiment is the same) and the performance test results of the finally prepared slurry a, slurry B and the two-fluid grouting material are shown in table 1 below.
TABLE 1 Effect of Water addition on Dual fluid grouting Material Performance
As can be seen from the data of Table 1 in combination with example 1, the storage time of slurry A and slurry B is gradually prolonged along with the increase of the water addition amount; the fluidity of the slurry A and the slurry B is gradually increased; the initial setting time and the final setting time of the double-liquid grouting material are gradually prolonged; the compressive strength of the double-liquid grouting material 2h is gradually reduced. When the water adding amount is small, the slurry is too thick and cannot meet the pumping construction requirement; when the water adding amount is large, the slurry can generate segregation phenomenon, thereby also influencing the construction. Therefore, it is recommended to set the amount of water to be added within a range of 350 to 500 g.
Example 4
The difference between the magnesium oxychloride cement-based two-fluid grouting material of the embodiment and the embodiment 1 is that: the addition amount of the light-burned magnesia powder is different when the slurry A is prepared, and other parameters are the same as those in the example 1, and are not described again. The addition amount of the light-burned magnesia powder during the preparation of the slurry A and the performance test results of the finally prepared slurry A, slurry B and two-fluid grouting material are shown in the following table 2.
TABLE 2 influence of the amount of light-burned MgO powdered material added on the Properties of the two-fluid grouting Material
As can be seen from table 2 in conjunction with the data of example 1, the storage time of slurry a is gradually shortened and the fluidity of slurry a is gradually decreased as the amount of the light-burned magnesia powder is increased, wherein the slurry tends to segregate when the amount of the light-burned magnesia powder is small, and the slurry is viscous when the amount thereof is large, thereby affecting the construction both when it is small and when it is large. The initial setting time and the final setting time of the double-liquid grouting material are both shortened and then prolonged, and correspondingly, the compressive strength of the double-liquid grouting material for 2h is also increased and then reduced. In view of the properties, it is recommended to limit the amount of the light-burned magnesium oxide powder to 950 to 980 g.
Example 5
The magnesium oxychloride cement-based two-fluid grouting material of the embodiment is different from the magnesium oxychloride cement-based two-fluid grouting material of the embodiment 1 in that: the addition amount of magnesium chloride hexahydrate in the preparation of slurry B is different, and other parameters are the same as those in example 1, and are not described again. The addition amount of magnesium chloride hexahydrate during preparation of slurry B and the performance test results of the finally prepared slurry A, slurry B and two-liquid grouting material are shown in the following table 3.
TABLE 3 influence of the amount of magnesium chloride hexahydrate on the Properties of the biliquid grouting materials
As can be seen from the data in Table 3 in combination with example 1, the storage time of the slurry B is gradually prolonged and the fluidity of the slurry B is gradually increased with the increase of the amount of magnesium oxychloride; the initial setting time and the final setting time of the double-liquid grouting material are both shortened and prolonged; the compressive strength of 2h is increased and then reduced. Wherein, the amount of the magnesium chloride is between 600 and 800g, and all properties of the double-liquid grouting material are better, so the amount of the magnesium chloride hexahydrate is suggested to be between 600 and 800 g.
Comparative example 1
The two-fluid grouting material of the comparative example is different from the grouting material of example 1 in that: a component was removed from slurry a and slurry B, and other parameters were the same as in example 1, and are not described again. The performance test results of a certain component on the finally prepared slurry A, slurry B and two-liquid grouting material are shown in the following table 4.
TABLE 4 Effect of certain Components on the Performance of two-fluid grouting materials
Note: since the slurry A contains no phosphate, the two rows of phosphate correspond to no change, and are indicated by "-".
As can be seen from the data in table 4 in combination with example 1, after a certain component is removed, the performance of the two-fluid grouting material is affected to different degrees, wherein potassium dihydrogen phosphate and sodium dihydrogen phosphate are removed, and the initial setting time and the final setting time of the two-fluid grouting material are mainly affected; after the water reducing agent is removed, the fluidity of the slurry is obviously reduced, so that the construction is influenced; after the hydroxypropyl methyl cellulose is removed, the cohesiveness of the slurry is poor, and the segregation and delamination phenomena are easy to occur.
Comparative example 2
The two-fluid grouting material of the comparative example is different from the grouting material of example 1 in that: all the phosphates in the powder B are monopotassium phosphate or all the phosphates are sodium dihydrogen phosphate, and the total addition amount and other parameters of the phosphates are the same as those in the embodiment 1, and are not described again. The effect of changes in the phosphate species on the properties of the finally prepared slurry a, slurry B, two-fluid grouting materials is shown in table 5 below.
TABLE 5 Effect of changes in phosphate type in B slurries on the Performance of biliquid grouting materials
As can be seen from the data in Table 5 in combination with example 1, the single blend of potassium dihydrogen phosphate and sodium dihydrogen phosphate has less influence on the storage time and fluidity of the B slurry than the blend, but the initial setting time and final setting time of the two-fluid grouting material are prolonged and the 2h compressive strength is reduced compared with the single blend. That is, the blend of potassium dihydrogen phosphate and sodium dihydrogen phosphate is more advantageous in setting time and 2h compressive strength than the blend alone, and therefore, the blend is recommended.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The magnesium oxychloride cement-based double-liquid grouting material is characterized in that the double-liquid grouting material is formed by mixing slurry A and slurry B in equal volume; wherein:
the slurry A consists of powder A and water in a weight ratio of powder A to water =100 to (38-50);
the powder A consists of the following raw materials in parts by weight: 95-98 parts of light-burned magnesia powder, 1-3 parts of a water reducing agent I and 0.5-2 parts of hydroxypropyl methyl cellulose;
the slurry B consists of powder B and water in a weight ratio of powder B to water =100 to (38-50);
the powder B consists of the following raw materials in parts by weight: 60-80 parts of magnesium chloride hexahydrate, 10-20 parts of potassium dihydrogen phosphate, 10-20 parts of sodium dihydrogen phosphate, 3-5 parts of a water reducing agent II and 0.5-2 parts of hydroxypropyl methyl cellulose;
the light-burned magnesia powder is light-burned magnesia which meets the grade of CBM85 and above in YB/T5206-2004 table 1 of ferrous metallurgy industry standard light-burned magnesia;
the specific surface area of the light-burned magnesia powder is not less than 400m 2 /kg。
2. The magnesium oxychloride cement-based biliquid grouting material of claim 1, wherein the first water reducing agent and the second water reducing agent are both commercially available naphthalene powder water reducing agents.
3. The magnesium oxychloride cement-based biliquid grouting material of claim 2, wherein the water reducing rates of the first water reducing agent and the second water reducing agent are not less than 20%.
4. The magnesium oxychloride cement-based biliquid grouting material of claim 1, wherein the MgCl in the magnesium chloride hexahydrate 2 ·6H 2 The mass content of O is not less than 85%.
5. The magnesium oxychloride cement-based biliquid grouting material of claim 1, wherein the potassium dihydrogen phosphate is a potassium dihydrogen phosphate which meets the standards of chemical industry "fertilizer-grade potassium dihydrogen phosphate" HG/T2321-2016 and is qualified in Table 1 and above.
6. The magnesium oxychloride cement-based biliquid grouting material of claim 1, wherein the sodium dihydrogen phosphate is a product meeting requirements in table 1 of "by-product sodium dihydrogen phosphate" Q/371426LS 006-2016 of texas long contained chemical industry ltd.
7. The magnesium oxychloride cement-based two-fluid grouting material of claim 1, wherein the viscosity of the 2% aqueous solution of hydroxypropyl methylcellulose is from 10 to 20 ten thousand mPa-s.
8. The preparation method of the magnesium oxychloride cement-based biliquid grouting material according to any one of claims 1 to 7, characterized by comprising the steps of:
step one, weighing corresponding raw materials according to the weight parts of the powder A and the powder B, and uniformly mixing to obtain the powder A and the powder B respectively;
step two, uniformly mixing the powder component A and water in proportion to prepare slurry A; uniformly mixing the powder component B and water in proportion to prepare slurry B;
and step three, uniformly mixing the slurry A and the slurry B according to the same volume to obtain the magnesium oxychloride cement-based double-liquid grouting material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111034137.5A CN113735549B (en) | 2021-09-03 | 2021-09-03 | Magnesium oxychloride cement-based double-liquid grouting material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111034137.5A CN113735549B (en) | 2021-09-03 | 2021-09-03 | Magnesium oxychloride cement-based double-liquid grouting material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113735549A CN113735549A (en) | 2021-12-03 |
| CN113735549B true CN113735549B (en) | 2023-02-03 |
Family
ID=78735580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111034137.5A Active CN113735549B (en) | 2021-09-03 | 2021-09-03 | Magnesium oxychloride cement-based double-liquid grouting material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113735549B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117776659A (en) * | 2023-11-27 | 2024-03-29 | 山东大学 | Green plugging material for karst water and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109928711A (en) * | 2019-04-19 | 2019-06-25 | 辽宁科大中驰镁建材科技有限公司 | The magnesia high-strength slip casting material for repairing of one kind and preparation method and application |
| CN112174634A (en) * | 2020-10-19 | 2021-01-05 | 常州工学院 | Magnesium phosphate cement-based double-liquid grouting material and preparation method thereof |
-
2021
- 2021-09-03 CN CN202111034137.5A patent/CN113735549B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109928711A (en) * | 2019-04-19 | 2019-06-25 | 辽宁科大中驰镁建材科技有限公司 | The magnesia high-strength slip casting material for repairing of one kind and preparation method and application |
| CN112174634A (en) * | 2020-10-19 | 2021-01-05 | 常州工学院 | Magnesium phosphate cement-based double-liquid grouting material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113735549A (en) | 2021-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104310918B (en) | For the cement-base composite material and its production and use of 3D printing technique | |
| CN105174886B (en) | A kind of limestone aquifer slip casting transformation material that is applicable to extra long distance pumping | |
| CN103449762B (en) | Early-strength micro-expanding synchronous grouting material prepared from shield tailings and preparation method of synchronous grouting material | |
| CN107698226A (en) | A kind of cement-silicate injecting paste material | |
| CN110781587B (en) | Multi-objective optimization method for anti-segregation waste rock filling slurry by using low-quality solid waste | |
| CN113735549B (en) | Magnesium oxychloride cement-based double-liquid grouting material and preparation method thereof | |
| CN108585592A (en) | A kind of Concrete synergist and preparation method thereof | |
| CN115180913B (en) | Expansion type full tailing filling material for mine goaf roof filling | |
| CN107324713B (en) | A kind of self-compaction concrete filled steel tube and preparation method thereof | |
| CN112047708B (en) | Sprayed concrete and construction method thereof | |
| CN113968714A (en) | Aluminate cement-based spraying mortar and preparation method thereof | |
| CN104446296A (en) | Filling material prepared from all industrial solid wastes and preparation method of filling material | |
| CN109020419A (en) | A kind of tunnel inverted arch ultra-fine inorganic grout material and preparation method thereof | |
| CN108046653B (en) | External admixture for shield single-liquid synchronous grouting | |
| CN114573278B (en) | Shield grouting material and preparation method thereof | |
| CN110818371B (en) | Inorganic reinforcing material for overspeed mine and preparation method thereof | |
| WO2024152438A1 (en) | Anti-seepage accelerator and preparation method therefor | |
| CN113754366A (en) | Anti-knock and anti-impact grouting material and preparation method thereof | |
| CN103539416A (en) | Special novel shear-resistant mortar for synchronous grouting and preparation method thereof | |
| CN115073117B (en) | Mining low-temperature ultra-high crystal water rapid-hardening filling support material and preparation method thereof | |
| CN111423142A (en) | Cement slurry additive for foundation treatment | |
| CN102745951B (en) | Method for quickly preparing formula of shield backfill grouting slurry | |
| CN107759126B (en) | Water reducing agent for sprayed concrete and preparation method thereof | |
| JP3461635B2 (en) | Injection method | |
| CN113816701A (en) | Aluminate and portland cement based double-liquid grouting material 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 |