CN108358483B - A kind of method of quick raising alkali magnesium sulfate strength of cement and water repelling property - Google Patents
A kind of method of quick raising alkali magnesium sulfate strength of cement and water repelling property Download PDFInfo
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- CN108358483B CN108358483B CN201810397599.5A CN201810397599A CN108358483B CN 108358483 B CN108358483 B CN 108358483B CN 201810397599 A CN201810397599 A CN 201810397599A CN 108358483 B CN108358483 B CN 108358483B
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- magnesium sulfate
- alkali magnesium
- alkali
- cement
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- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 title claims abstract description 331
- 229910052943 magnesium sulfate Inorganic materials 0.000 title claims abstract description 165
- 235000019341 magnesium sulphate Nutrition 0.000 title claims abstract description 165
- 239000003513 alkali Substances 0.000 title claims abstract description 121
- 239000004568 cement Substances 0.000 title claims abstract description 72
- 229910001868 water Inorganic materials 0.000 title claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000001846 repelling effect Effects 0.000 title claims abstract description 12
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical class [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000002002 slurry Substances 0.000 claims abstract description 41
- 239000000725 suspension Substances 0.000 claims abstract description 40
- 238000012423 maintenance Methods 0.000 claims abstract description 39
- 239000000654 additive Substances 0.000 claims abstract description 22
- ODIGIKRIUKFKHP-UHFFFAOYSA-N (n-propan-2-yloxycarbonylanilino) acetate Chemical compound CC(C)OC(=O)N(OC(C)=O)C1=CC=CC=C1 ODIGIKRIUKFKHP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000000996 additive effect Effects 0.000 claims abstract description 20
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 12
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 24
- 239000007787 solid Substances 0.000 claims description 21
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 16
- 239000004310 lactic acid Substances 0.000 claims description 12
- 235000014655 lactic acid Nutrition 0.000 claims description 12
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 8
- HELHAJAZNSDZJO-OLXYHTOASA-L sodium L-tartrate Chemical compound [Na+].[Na+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O HELHAJAZNSDZJO-OLXYHTOASA-L 0.000 claims description 7
- 239000001433 sodium tartrate Substances 0.000 claims description 7
- 229960002167 sodium tartrate Drugs 0.000 claims description 7
- 235000011004 sodium tartrates Nutrition 0.000 claims description 7
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 6
- 239000004251 Ammonium lactate Substances 0.000 claims description 5
- 229940059265 ammonium lactate Drugs 0.000 claims description 5
- 235000019286 ammonium lactate Nutrition 0.000 claims description 5
- RZOBLYBZQXQGFY-HSHFZTNMSA-N azanium;(2r)-2-hydroxypropanoate Chemical compound [NH4+].C[C@@H](O)C([O-])=O RZOBLYBZQXQGFY-HSHFZTNMSA-N 0.000 claims description 5
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- YWYZEGXAUVWDED-UHFFFAOYSA-N triammonium citrate Chemical compound [NH4+].[NH4+].[NH4+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O YWYZEGXAUVWDED-UHFFFAOYSA-N 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- 150000004675 formic acid derivatives Chemical class 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 abstract description 13
- 238000006703 hydration reaction Methods 0.000 abstract description 4
- 230000036571 hydration Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 15
- 230000006835 compression Effects 0.000 description 14
- 238000007906 compression Methods 0.000 description 14
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 10
- 239000011777 magnesium Substances 0.000 description 10
- 229910052749 magnesium Inorganic materials 0.000 description 10
- 239000000843 powder Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 8
- 239000001095 magnesium carbonate Substances 0.000 description 8
- 235000014380 magnesium carbonate Nutrition 0.000 description 8
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 8
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 8
- 238000002791 soaking Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 5
- 235000012254 magnesium hydroxide Nutrition 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 4
- 239000000347 magnesium hydroxide Substances 0.000 description 4
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- NMFHJNAPXOMSRX-PUPDPRJKSA-N [(1r)-3-(3,4-dimethoxyphenyl)-1-[3-(2-morpholin-4-ylethoxy)phenyl]propyl] (2s)-1-[(2s)-2-(3,4,5-trimethoxyphenyl)butanoyl]piperidine-2-carboxylate Chemical compound C([C@@H](OC(=O)[C@@H]1CCCCN1C(=O)[C@@H](CC)C=1C=C(OC)C(OC)=C(OC)C=1)C=1C=C(OCCN2CCOCC2)C=CC=1)CC1=CC=C(OC)C(OC)=C1 NMFHJNAPXOMSRX-PUPDPRJKSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- -1 organic acid Salt Chemical class 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- OLZDXDPSDUSGIS-UHFFFAOYSA-N sulfinylmagnesium Chemical compound [Mg].S=O OLZDXDPSDUSGIS-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 244000248349 Citrus limon Species 0.000 description 1
- 235000005979 Citrus limon Nutrition 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-L Phosphate ion(2-) Chemical compound OP([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-L 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 239000004280 Sodium formate Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- RCJVRSBWZCNNQT-UHFFFAOYSA-N dichloridooxygen Chemical compound ClOCl RCJVRSBWZCNNQT-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 description 1
- 235000019254 sodium formate Nutrition 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 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
- C04B9/00—Magnesium cements or similar cements
- C04B9/04—Magnesium cements containing sulfates, nitrates, phosphates or fluorides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention provides a kind of methods for quickly improving alkali magnesium sulfate strength of cement and water repelling property, alkali magnesium sulfate cement slurry containing additive is subjected to the first maintenance 14~28 days in air, is then soaked in alkali magnesium sulfate saturation suspension and carries out the second maintenance 1~3 day；The alkali magnesium sulfate saturation suspension includes alkali magnesium sulfate, magnesium sulfate, acylate and water.Method provided by the invention continues to conserve by the way that the alkali magnesium sulfate cement slurry of hardening to be soaked in alkali magnesium sulfate and be saturated in suspension, accelerate the further aquation of unreacted activated magnesia in alkali magnesium sulfate cement, it improves magnesia degree of hydration and improves the production quantity of alkali magnesium sulfate intensity phase, porosity is reduced, and then can quickly improve the intensity and water resistance of alkali magnesium sulfate cement.
Description
Technical field
The present invention relates to inorganic coagulation material technical fields, in particular to a kind of quickly to improve alkali magnesium sulfate strength of cement
With the method for water repelling property.
Background technique
Alkali magnesium sulfate cement is a kind of novel air-setting magnesium to grow up after magnesia oxychloride cement, magnesium oxysulfide concrete
Matter cementitious material is a kind of using activated magnesia, magnesium sulfate, additive as the magnesium gelatinous material of primary raw material.With magnesium oxysulfide
Cement is similar, and alkali magnesium sulfate cement also belongs to MgO-MgSO4-H2O ternary system, except that due to being added to additive,
Basic change has occurred in its hydrated product.
In alkali magnesium sulfate cement, in order to guarantee its intensity, additive is essential ingredient.The addition of additive,
It can make to generate more alkali magnesium sulfate intensity phase in alkali magnesium sulfate cement.But the additive reported at present is mainly lemon
The additives such as acid, phosphoric acid, these additives have deferred action more.In addition, the magnesia for preparing alkali magnesium sulfate cement is main
From caustic magnesite in powder, and caustic magnesite in powder is because of calcine technology difference, more or less magnesia containing dead roasting, dead roasting
Magnesia hydration reaction is slow.Therefore, using conventional air cured method, deferred action and dead roasting oxygen due to additive
It is slow to change magnesium aquation, causes its later period gain in strength slow.
Also, due to still having a large amount of oxygen when conserving 14 days or 28 days using conventional air cured method
Changing magnesium (including dead roasting magnesia), there is no reactions completely, therefore the secondary hydration generation after soaking water due to magnesia is low
The magnesium hydroxide of intensity, the expansion of these magnesium hydroxides are the one of the major reasons for causing strength of cement to decline.
Summary of the invention
The purpose of the present invention is to provide a kind of methods for quickly improving alkali magnesium sulfate strength of cement and water repelling property.This
The method that invention provides can quickly improve intensity and water repelling property.
The present invention provides a kind of methods for quickly improving alkali magnesium sulfate strength of cement and water repelling property, including following step
It is rapid:
(1) the alkali magnesium sulfate cement slurry containing additive is provided；
(2) the alkali magnesium sulfate cement slurry that the step (1) obtains is subjected to the first maintenance 14~28 days in air,
Obtain primary cement；
(3) primary cement that the step (2) obtains progress second in alkali magnesium sulfate saturation suspension is soaked in support
Shield 1~3 day；The alkali magnesium sulfate saturation suspension includes alkali magnesium sulfate, magnesium sulfate, acylate and water.
Preferably, the mass content of magnesium sulfate is 20~25% in step (3) the alkali magnesium sulfate saturation suspension, is had
The mass content of machine hydrochlorate is 1~10%.
Preferably, the acylate includes one of sodium tartrate, ammonium citrate, odium stearate and ammonium lactate or more
Kind.
Preferably, in the step (3) alkali magnesium sulfate saturation suspension preparation the following steps are included:
(a) the alkali magnesium sulfate slurry containing lactic acid is provided；
(b) the alkali magnesium sulfate slurry for obtaining the step (a) carries out third maintenance in air, obtains solid；
(c) it is mixed after crushing the solid that the step (b) obtains with acylate, magnesium sulfate and water, obtains alkali formula sulphur
Sour magnesium is saturated suspension.
It preferably, according to the mass fraction, include 100 parts of activated magnesia in step (a) the alkali magnesium sulfate slurry, sulphur
30~100 parts of sour magnesium, 30~200 parts and 0.1~1 part of lactic acid of water.
Preferably, in the step (b) third conserve temperature be room temperature, third maintenance air humidity be 80% with
Under.
Preferably, the time that third conserves in the step (b) is 3 days or more.
Preferably, the temperature of the second maintenance is room temperature in the step (3).
Preferably, the additive in the step (1) includes dihydric phosphate, citric acid, phosphoric acid, formates and maleic acid
One of acid anhydride is a variety of.
Preferably, in the step (2) first maintenance temperature be room temperature, first maintenance air humidity be 80% with
Under.
The present invention provides a kind of methods for quickly improving alkali magnesium sulfate strength of cement and water repelling property, will contain additional
The alkali magnesium sulfate cement slurry of agent carries out the first maintenance 14~28 days in air, and it is outstanding to be then soaked in alkali magnesium sulfate saturation
The second maintenance 1~3 day is carried out in turbid；The alkali magnesium sulfate saturation suspension includes alkali magnesium sulfate, magnesium sulfate, organic acid
Salt and water.The present invention after conserving alkali magnesium sulfate cement slurry in air by being soaked in containing magnesium sulfate and acylate
Alkali magnesium sulfate saturation suspension in continue to conserve, can accelerate unreacted activated magnesia in alkali magnesium sulfate cement into
One step aquation, in addition alkali magnesium sulfate saturation suspension avoid it is primary at alkali magnesium sulfate cement in intensity mutually conserving
It is dissolved in solution.Meanwhile the presence of acylate can be further such that former unreacted magnesia generates alkali magnesium sulfate aquation
Phase avoids the formation of low intensive magnesium hydroxide.Therefore, this method is by improving magnesia degree of hydration and improving alkali formula sulphur
The production quantity of sour magnesium intensity phase reduces porosity, and then can quickly improve the intensity and water resistance of alkali magnesium sulfate cement.
The experimental results showed that alkali magnesium sulfate strength of cement obtained in method provided by the invention be 87MPa, soaking water 28 days
Afterwards, compression strength 81MPa, calculating coefficient of softing is 0.93.
Specific embodiment
The present invention provides a kind of methods for quickly improving alkali magnesium sulfate strength of cement and water repelling property, including following step
It is rapid:
(1) the alkali magnesium sulfate cement slurry containing additive is provided；
(2) the alkali magnesium sulfate cement slurry that the step (1) obtains is subjected to the first maintenance 14~28 days in air,
Obtain primary cement；
(3) primary cement that the step (2) obtains progress second in alkali magnesium sulfate saturation suspension is soaked in support
Shield 1~3 day；The alkali magnesium sulfate saturation suspension includes alkali magnesium sulfate, magnesium sulfate, acylate and water.
The present invention provides the alkali magnesium sulfate cement slurry containing additive.The present invention is to the alkali magnesium sulfate cement slurry
The type of body does not have special restriction, using alkali magnesium sulfate cement slurry well known to those skilled in the art.The present invention
The method of offer is suitable for the alkali magnesium sulfate cement of all kinds.
The present invention preferably mixes activated magnesia, magnesium sulfate, water and additive, obtains the alkali formula sulfuric acid containing additive
Magnesium cement slurry.The present invention does not have special restriction to the ratio of the activated magnesia, magnesium sulfate, water and additive, uses
The raw material proportioning well known to those skilled in the art for preparing alkali magnesium sulfate cement.In the present invention, the active oxidation
The molar ratio of magnesium, magnesium sulfate and water be preferably (6~9): 1:20, in an embodiment of the present invention specially 6:1:20,7:1:20,
8:1:20 or 9:1:20.In the present invention, the quality of the additive is preferably the 0.1~1% of activated magnesia quality.
The present invention does not have special restriction to the type of the activated magnesia, using work well known to those skilled in the art
Property magnesia, in an embodiment of the present invention specially light-calcined magnesite powder.In the present invention, the additive preferably wraps
Include one of dihydric phosphate, citric acid, phosphoric acid, formates and maleic anhydride or a variety of.
The present invention restriction not special to the operation of the mixing of the activated magnesia, magnesium sulfate and water, using ability
The technical solution of cement slurry is prepared known to field technique personnel.
After obtaining alkali magnesium sulfate cement slurry, the alkali magnesium sulfate cement slurry is carried out by the present invention in air
One maintenance 14~28 days, obtains primary cement.In the present invention, the temperature of first maintenance is preferably room temperature, more preferably
40 DEG C hereinafter, most preferably 20~35 DEG C；It is described first maintenance air humidity be preferably 80% hereinafter, more preferably 50% with
Under.In the present invention, the time of first maintenance is preferably 16~24 days, and more preferably 21 days.
After obtaining primary cement, the primary cement is soaked in alkali magnesium sulfate saturation suspension and carries out the by the present invention
Two maintenances 1~3 day.In the present invention, the alkali magnesium sulfate saturation suspension includes alkali magnesium sulfate, magnesium sulfate, organic acid
Salt and water.In the present invention, the alkali magnesium sulfate saturation suspension can accelerate unreacted activity in alkali magnesium sulfate cement
The further aquation of magnesia, in addition alkali magnesium sulfate saturation suspension avoid it is primary at alkali magnesium sulfate cement in it is strong
Degree mutually dissolves in conditioning solutions；Meanwhile the presence of acylate can be further such that former unreacted magnesia generates alkali formula
Magnesium sulfate aquation phase, avoids the formation of low intensive magnesium hydroxide.
In the present invention, the mass content of magnesium sulfate is preferably 20~25% in the alkali magnesium sulfate saturation suspension,
More preferably 22~24%；The mass content of acylate is preferably 1~10% in the alkali magnesium sulfate saturation suspension, more
Preferably 3~7%.In the present invention, the acylate preferably includes sodium tartrate, ammonium citrate, odium stearate and lactic acid
One of ammonium is a variety of.
In the present invention, the preparation of the alkali magnesium sulfate saturation suspension preferably includes following steps:
(a) the alkali magnesium sulfate slurry containing lactic acid is provided；
(b) the alkali magnesium sulfate slurry for obtaining the step (a) carries out third maintenance in air, obtains solid；
(c) it is mixed after crushing the solid that the step (b) obtains with acylate, magnesium sulfate and water, obtains alkali formula sulphur
Sour magnesium is saturated suspension.
Present invention preferably provides the alkali magnesium sulfate slurries containing lactic acid.In the present invention, according to the mass fraction, the alkali
Preferably include 100 parts of activated magnesia in formula magnesium sulfate slurry, 30~100 parts of magnesium sulfate, 30~200 parts of water and lactic acid 0.1~1
Part.
The present invention does not have special restriction to the preparation method of the alkali magnesium sulfate slurry, using those skilled in the art
The well known technical solution for preparing alkali magnesium sulfate cement slurry.
After obtaining alkali magnesium sulfate slurry, the alkali magnesium sulfate slurry is preferably carried out third in air and supported by the present invention
Shield, obtains solid.
In the present invention, the temperature of third maintenance is preferably room temperature, more preferably 40 DEG C hereinafter, most preferably 20~
35℃；The air humidity of the third maintenance is preferably 80% hereinafter, more preferably 60% or less.In the present invention, described
The time of three maintenances is preferably 3 days or more.
After obtaining solid, the present invention is mixed after preferably crushing the solid with acylate, magnesium sulfate and water, obtains alkali
Formula magnesium sulfate is saturated suspension.The not special restriction of operation of the present invention to the crushing, it is ripe using those skilled in the art
The technical solution for the crushing known.In the present invention, described crush is preferably ball milling.The present invention to the rate of the ball milling and
Time does not have special restriction, and solid can be crushed to required granularity.In the present invention, after the crushing product grain
It is more than degree preferably 200 mesh, and D9074 μm of <.
The not special limit of the operation that the present invention mixes the smashed solid with acylate, magnesium sulfate and water
It is fixed, using the technical solution well known to those skilled in the art for preparing suspension.The present invention preferably prepare acylate and
Then the aqueous solution of magnesium sulfate is mixed with smashed solid.In the present invention, the smashed solid and acylate,
The ratio of magnesium sulfate and water is matched with the alkali magnesium sulfate saturation suspension that can obtain required ingredient.
In the present invention, the temperature of second maintenance is preferably room temperature, more preferably 40 DEG C hereinafter, most preferably 20~
35℃.In the present invention, the time of second maintenance is preferably 2 days.In the present invention, in second maintenance processes, just
The further aquation of unreacted activated magnesia in class g cement, alkali magnesium sulfate saturation suspension avoid it is primary at alkali formula
It is dissolved in intensity phase conditioning solutions in magnesium sulfate cement, the presence of acylate can be further such that former unreacted magnesia
Alkali magnesium sulfate aquation phase is generated, the formation of low intensive magnesium hydroxide is avoided, substantially increases alkali magnesium sulfate strength of cement.
After the completion of second maintenance, the present invention preferably dries the product that described second conserves, and obtains alkali magnesium sulfate cement.
In order to further illustrate the present invention, below with reference to embodiment to quick raising alkali magnesium sulfate water provided by the invention
Mud intensity and the method for water repelling property are described in detail, but they cannot be interpreted as to the limit to the scope of the present invention
It is fixed.
In following comparative example and embodiment, unless otherwise specified, the temperature conserved in the air is 40 DEG C hereinafter, maintenance
Air humidity be 80% or less；The temperature conserved in the alkali magnesium sulfate water saturation suspension is 40 DEG C or less.
Comparative example 1:
Activated magnesia (using light-calcined magnesite powder), magnesium sulfate and water are added according to molar ratio for 7:1:20, phosphoric acid
Amount is 1% formation cement slurry of activated magnesia, and maintenance obtained alkali magnesium sulfate cement to 28 days in normal temperature air.
Testing its compression strength is 65MPa；After test specimen soaking water 28 days, testing its intensity is 50MPa, calculates softening system
Number is 0.77.
Comparative example 2:
Activated magnesia (using light-calcined magnesite powder), magnesium sulfate and water are added according to molar ratio for 7:1:20, phosphoric acid
Amount is 1% formation cement slurry of activated magnesia, and maintenance obtained alkali magnesium sulfate cement to 28 days in normal temperature air.
Testing its compression strength is 65MPa；Test specimen is immersed in Adlerika 3 days that magnesium sulfate mass fraction is 25%
Taking-up is dried, and testing its intensity is 61MPa；Continue to test its compression strength after impregnating number 28 days to be 47MPa, coefficient of softing is
0.72。
Comparative example 3:
Activated magnesia (using light-calcined magnesite powder), magnesium sulfate and water are added according to molar ratio for 7:1:20, phosphoric acid
Amount is 1% formation cement slurry of activated magnesia, and maintenance obtained alkali magnesium sulfate cement to 28 days in normal temperature air.
Testing its compression strength is 65MPa；It is 25%, sodium tartrate quality point that test specimen, which is immersed in magnesium sulfate mass fraction,
Number took out for 3 days in 1% mixed solution to be dried.
Testing its intensity is 62MPa, continues to test its compression strength after impregnating number 28 days to be 49MPa, coefficient of softing is
0.78。
Embodiment 1:
Activated magnesia (using light-calcined magnesite powder), magnesium sulfate and water are added according to molar ratio for 7:1:20, phosphoric acid
Amount is 1% formation cement slurry of activated magnesia, and maintenance obtained alkali magnesium sulfate cement to 28 days in normal temperature air.
Being immersed in magnesium sulfate mass fraction is 25%, and the alkali magnesium sulfate that sodium tartrate mass fraction is 1% is suspended
It takes out within 3 days in liquid and dries.
Alkali magnesium sulfate saturation suspension therein is prepared by following steps:
(1) 100g activated magnesia, 50g epsom salt, 1g lactic acid, 50g water are mixed to form slurry, supported in air
Shield obtains homogeneous solid in 7 days；
(2) after the homogeneous solid in (1) step being ground to 200 mesh, take the mixing of 1g and magnesium sulfate and sodium tartrate molten
Liquid mixing, forming magnesium sulfate mass fraction is 25%, and the alkali magnesium sulfate that sodium tartrate mass fraction is 1% is saturated suspension.
Testing its compression strength is 87MPa, improves 34% compared with comparative example 1；After soaking water 28 days, its resistance to compression is tested
Intensity is 81MPa, and calculating coefficient of softing is 0.93, improves 21%.
Embodiment 2:
By activated magnesia (using light-calcined magnesite powder), magnesium sulfate and water according to molar ratio for 6:1:20, maleic anhydride
Additive amount is 1% formation cement slurry of activated magnesia, and maintenance obtained alkali magnesium sulfate cement to 28 days in normal temperature air.
Being immersed in magnesium sulfate mass fraction is 25%, and the alkali magnesium sulfate that ammonium citrate mass fraction is 1% is suspended
It takes out within 3 days in liquid and dries.
Alkali magnesium sulfate therein is saturated suspension, is prepared by following steps:
(1) 100g activated magnesia, 50g epsom salt, 1g lactic acid, 50g water are mixed to form slurry, supported in air
Shield obtains homogeneous solid in 7 days；
(2) after the homogeneous solid in (1) step being ground to 200 mesh, take the mixing of 1g and magnesium sulfate and maleic anhydride molten
Liquid mixing, forming magnesium sulfate mass fraction is 25%, and the alkali magnesium sulfate that maleic anhydride mass fraction is 1% is saturated suspension.
Testing its compression strength is 84MPa, improves 34% compared with comparative example 1；After soaking water 28 days, its resistance to compression is tested
Intensity is 75MPa, and calculating coefficient of softing is 0.89, improves 16%.
Embodiment 3:
By activated magnesia (using light-calcined magnesite powder), magnesium sulfate and water according to molar ratio for 8:1:20, biphosphate
Sodium additive amount is 1% formation cement slurry of activated magnesia, and maintenance obtained alkali magnesium sulfate water to 28 days in normal temperature air
Mud.
Being immersed in magnesium sulfate mass fraction is 25%, and the alkali magnesium sulfate that odium stearate mass fraction is 1% is suspended
It takes out within 3 days in liquid and dries.
Alkali magnesium sulfate therein is saturated suspension, is prepared by following steps:
(1) 100g activated magnesia, 50g epsom salt, 1g lactic acid, 50g water are mixed to form slurry, supported in air
Shield obtains homogeneous solid in 7 days；
(2) after the homogeneous solid in (1) step being ground to 200 mesh, take 1g and the mixing of magnesium sulfate and odium stearate molten
Liquid mixing, forming magnesium sulfate mass fraction is 25%, and the alkali magnesium sulfate that odium stearate mass fraction is 1% is saturated suspension.
Testing its compression strength is 90MPa, improves 38% compared with comparative example 1；After soaking water 28 days, its resistance to compression is tested
Intensity is 85MPa, and calculating coefficient of softing is 0.94, improves 22%.
Embodiment 4:
Activated magnesia (using light-calcined magnesite powder), magnesium sulfate and water are added according to molar ratio for 9:1:20, sodium formate
Dosage is 1% formation cement slurry of activated magnesia, and maintenance obtained alkali magnesium sulfate cement to 28 days in normal temperature air.
Being immersed in magnesium sulfate mass fraction is 25%, the alkali magnesium sulfate suspension that ammonium lactate mass fraction is 1%
In 3 days take out dry.
Alkali magnesium sulfate therein is saturated suspension, is prepared by following steps:
(1) 100g activated magnesia, 50g epsom salt, 1g lactic acid, 50g water are mixed to form slurry, supported in air
Shield obtains homogeneous solid in 7 days；
(2) after the homogeneous solid in (1) step being ground to 200 mesh, the mixed solution of 1g Yu magnesium sulfate and ammonium lactate are taken
Mixing, forming magnesium sulfate mass fraction is 25%, and the alkali magnesium sulfate that ammonium lactate mass fraction is 1% is saturated suspension.
Testing its compression strength is 85MPa, improves 34% compared with comparative example 1；After soaking water 28 days, its resistance to compression is tested
Intensity is 80MPa, and calculating coefficient of softing is 0.94, improves 22%.
As can be seen from the above embodiments, method provided by the invention can quickly improve alkali magnesium sulfate strength of cement and
Water repelling property.
The above is only a preferred embodiment of the present invention, it is not intended to limit the present invention in any form.It should
It points out, for those skilled in the art, without departing from the principle of the present invention, if can also make
Dry improvements and modifications, these modifications and embellishments should also be considered as the scope of protection of the present invention.
Claims (6)
1. a kind of method for quickly improving alkali magnesium sulfate strength of cement and water repelling property, comprising the following steps:
(1) the alkali magnesium sulfate cement slurry containing additive is provided；
(2) the alkali magnesium sulfate cement slurry that the step (1) obtains is subjected to the first maintenance 14~28 days in air, is obtained
Primary cement；
(3) by the primary cement that the step (2) obtains be soaked in alkali magnesium sulfate saturation suspension in carry out second maintenance 1~
3 days；The alkali magnesium sulfate saturation suspension includes alkali magnesium sulfate, magnesium sulfate, acylate and water；Step (3) alkali
The mass content that formula magnesium sulfate is saturated magnesium sulfate in suspension is 20~25%, and the mass content of acylate is 1~10%；Institute
Stating acylate includes one of sodium tartrate, ammonium citrate, odium stearate and ammonium lactate or a variety of；Second maintenance
Temperature is room temperature；
In the step (3) alkali magnesium sulfate saturation suspension preparation the following steps are included:
(a) the alkali magnesium sulfate slurry containing lactic acid is provided；
(b) the alkali magnesium sulfate slurry for obtaining the step (a) carries out third maintenance in air, obtains solid；
(c) it is mixed after crushing the solid that the step (b) obtains with acylate, magnesium sulfate and water, obtains alkali magnesium sulfate
It is saturated suspension.
2. the method according to claim 1, wherein according to the mass fraction, step (a) alkali magnesium sulfate is starched
It include 100 parts of activated magnesia, 30~100 parts of magnesium sulfate, 30~200 parts and 0.1~1 part of lactic acid of water in body.
3. the method according to claim 1, wherein the temperature that third conserves in the step (b) is room temperature, the
The air humidity of three maintenances is 80% or less.
4. according to the method described in claim 3, it is characterized in that, in the step (b) third conserve time be 3 days with
On.
5. the method according to claim 1, wherein the additive in the step (1) include dihydric phosphate,
One of citric acid, phosphoric acid, formates and maleic anhydride are a variety of.
6. the method according to claim 1, wherein the temperature of the first maintenance is room temperature in the step (2), the
The air humidity of one maintenance is 80% or less.
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