CN117800639A - Modifier preparation method, modifier and machine-made sand concrete preparation method - Google Patents
Modifier preparation method, modifier and machine-made sand concrete preparation method Download PDFInfo
- Publication number
- CN117800639A CN117800639A CN202311607669.2A CN202311607669A CN117800639A CN 117800639 A CN117800639 A CN 117800639A CN 202311607669 A CN202311607669 A CN 202311607669A CN 117800639 A CN117800639 A CN 117800639A
- Authority
- CN
- China
- Prior art keywords
- component
- machine
- made sand
- modifier
- parts
- 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.)
- Pending
Links
- 239000004576 sand Substances 0.000 title claims abstract description 47
- 239000003607 modifier Substances 0.000 title claims abstract description 34
- 239000004567 concrete Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000000843 powder Substances 0.000 claims abstract description 36
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 16
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 16
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims abstract description 14
- 229920000805 Polyaspartic acid Polymers 0.000 claims abstract description 13
- 108010064470 polyaspartate Proteins 0.000 claims abstract description 13
- 229920000141 poly(maleic anhydride) Polymers 0.000 claims abstract description 10
- 239000002211 L-ascorbic acid Substances 0.000 claims abstract description 7
- 235000000069 L-ascorbic acid Nutrition 0.000 claims abstract description 7
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 7
- 229920002472 Starch Polymers 0.000 claims abstract description 7
- 229960005070 ascorbic acid Drugs 0.000 claims abstract description 7
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims abstract description 7
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims abstract description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 7
- 235000019698 starch Nutrition 0.000 claims abstract description 7
- 239000008107 starch Substances 0.000 claims abstract description 7
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims abstract description 6
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims abstract description 6
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 13
- 239000000654 additive Substances 0.000 claims description 10
- 230000000996 additive effect Effects 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 229920000289 Polyquaternium Polymers 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000011398 Portland cement Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 10
- 229910021645 metal ion Inorganic materials 0.000 abstract description 5
- 238000001179 sorption measurement Methods 0.000 abstract description 5
- 150000003863 ammonium salts Chemical group 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 241000208818 Helianthus Species 0.000 description 3
- 235000003222 Helianthus annuus Nutrition 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- -1 didodecyl Chemical group 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 239000002738 chelating agent Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- IQDGSYLLQPDQDV-UHFFFAOYSA-N dimethylazanium;chloride Chemical compound Cl.CNC IQDGSYLLQPDQDV-UHFFFAOYSA-N 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- ITFDXZLLAMYMBM-UHFFFAOYSA-N [Br-].[NH4+].[NH4+].C(CCCCCCCCCCC)C(=CC)C.[Br-] Chemical compound [Br-].[NH4+].[NH4+].C(CCCCCCCCCCC)C(=CC)C.[Br-] ITFDXZLLAMYMBM-UHFFFAOYSA-N 0.000 description 1
- SQWXJWJNQGQPPN-UHFFFAOYSA-M [Cl-].O(C1=CC=CC=C1)CCOCC[N+](C)(C)C Chemical compound [Cl-].O(C1=CC=CC=C1)CCOCC[N+](C)(C)C SQWXJWJNQGQPPN-UHFFFAOYSA-M 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- CADWTSSKOVRVJC-UHFFFAOYSA-N benzyl(dimethyl)azanium;chloride Chemical compound [Cl-].C[NH+](C)CC1=CC=CC=C1 CADWTSSKOVRVJC-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- FFJMLWSZNCJCSZ-UHFFFAOYSA-N n-methylmethanamine;hydrobromide Chemical compound Br.CNC FFJMLWSZNCJCSZ-UHFFFAOYSA-N 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- CBFCDTFDPHXCNY-UHFFFAOYSA-N octyldodecane Natural products CCCCCCCCCCCCCCCCCCCC CBFCDTFDPHXCNY-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920001184 polypeptide Polymers 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 102000004196 processed proteins & peptides Human genes 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- APSBXTVYXVQYAB-UHFFFAOYSA-M sodium docusate Chemical group [Na+].CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC APSBXTVYXVQYAB-UHFFFAOYSA-M 0.000 description 1
- 238000005406 washing 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a modifier preparation method, a modifier and a machine-made sand concrete preparation method, wherein the modifier comprises the following components: 20-30 parts of hydrolyzed polymaleic anhydride, 20-30 parts of sodium polyacrylate grafted starch, 10-20 parts of polyvinyl alcohol, 5-10 parts of polyquaternary ammonium salt, 5-10 parts of sodium silicate, 1-10 parts of sodium hexametaphosphate, 5-10 parts of polyaspartic acid and 1-10 parts of L-ascorbic acid. The modifier is added when the machine-made sand concrete is prepared, is environment-friendly, can be chelated with metal ions in stone powder to form insoluble fine solid particles, and can neutralize trace positive and negative charges generated in the crushing process of the machine-made sand so as to reduce the adsorption effect of the modifier on the water reducer, and meanwhile, has a better dispersing effect, can uniformly disperse the stone powder in a concrete system and prevent stone powder from holding and settling.
Description
Technical Field
The invention relates to the field of building materials, in particular to a modifier preparation method, a modifier and a machine-made sand concrete preparation method.
Background
With the continuous development of urban construction in recent twenty years, the yield of concrete is continuously increased, and the natural sand resources are extremely deficient due to the huge consumption of concrete, so that machine-made sand becomes main construction sand.
The machine-made sand is produced by crushing broken stone, stone powder is inevitably generated during crushing and shaping, and the stone powder in the machine-made sand can cause larger adsorptivity to the water reducer, so that the problems of high viscosity and poor fluidity of the water reducer, insignificant effect after the water reducer is added, bleeding and the like are caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides a modifier preparation method, a modifier and a machine-made sand concrete preparation method, and the modifier can form a complex with a plurality of metal ions in mud powder and stone powder of sand and stone aggregate, reduce the surface energy of high-adsorptivity powder and fine particles in concrete, reduce the interference and adsorption on a water reducer, and improve the action effect of the water reducer.
The technical purpose of the invention is realized by the following technical scheme:
a preparation method of a machine-made sand powder modifier comprises the steps of processing an A component and a B component respectively;
when the component A is processed, according to the mass portion ratio, 20 to 30 portions of sodium polyacrylate grafted starch, 5 to 10 portions of polyquaternium, 5 to 10 portions of sodium silicate, 1 to 10 portions of sodium hexametaphosphate and 1 to 10 portions of L-ascorbic acid are uniformly mixed to form the component A;
when the component B is processed, 10-20 parts of polyvinyl alcohol, 20-30 parts of hydrolyzed polymaleic anhydride and 5-10 parts of polyaspartic acid are prepared according to the mass part ratio; adding polyvinyl alcohol into deionized water according to the mass ratio of 1:11.5 under the stirring state, dispersing uniformly, heating to above 75 ℃, mechanically stirring until the polyvinyl alcohol is completely dissolved in the deionized water, cooling to 30 ℃, adding hydrolyzed polymaleic anhydride and polyaspartic acid, and stirring uniformly to obtain a component B.
Further, the mass ratio of the component A to the component B is 1:12.5.
The invention also provides a machine-made sand powder modifier, which is prepared by the method.
The invention also provides a preparation method of the machine-made sand concrete, wherein the component A and the component B of the machine-made sand powder modifier are respectively added, and the method comprises the following steps:
step 1, mixing cement, an admixture, machine-made sand and a component A to form a mixture C;
step 2, adding the component B and the water reducer into water, and uniformly mixing to form an additive D;
step 3, uniformly stirring the additive D and the mixture C to obtain a mixture E;
and step 4, adding coarse aggregate into the mixed material E and stirring to obtain machine-made sand concrete.
Further, according to the weight percentage, the cement content is 14.9-38.9%, the admixture content is 0-21.9%, the fine aggregate content is 32.1-71.7%, the coarse aggregate content is 0-45.7%, and the water reducer content is 0.3-0.53%; the content of the machine-made sand powder modifier is 0.0073 per mill-0.011 per mill of the mass of the fine aggregate; the residual content of the concrete is water.
Further, the admixture is at least one of fly ash and slag micropowder.
Further, the water reducer is a polycarboxylic acid water reducer, and the water reducing rate is 30% -40%.
Further, the cement is Portland cement.
Further, in step 2, the additive D is formulated with water added in an amount of total water content minus the water content in the B component.
Compared with the prior art, the invention has the beneficial effects that:
1. the machine-made sand powder modifier can form a complex with a plurality of metal ions in mud powder and stone powder of sand aggregate, reduce the surface energy of high-adsorption powder and fine particles in concrete, reduce the interference and adsorption on a water reducer, and improve the action effect of the water reducer.
2. The machine-made sand powder modifier can neutralize trace positive and negative charges generated in the machine-made sand crushing process, so that the adsorption effect on the water reducer is reduced, and meanwhile, the machine-made sand powder modifier has a better dispersing effect, so that stone powder can be uniformly dispersed in a concrete system, and stone powder agglomeration settlement is prevented.
3. The modifier can effectively improve the workability of machine-made sand concrete, improve the water retention property and reduce bleeding and segregation.
4. The modified material is wide in application, easy to obtain, nontoxic and harmless, most of the modified material can be degraded by microorganisms, and the modification process is environment-friendly and does not have negative influence on the environment.
Detailed Description
The technical scheme of the invention is further described below with reference to the specific embodiments:
example 1
A preparation method of a machine-made sand powder modifier comprises the steps of processing an A component and a B component respectively;
when the component A is processed, 20-30 parts of sodium polyacrylate grafted starch, 5-10 parts of polyquaternium, 5-10 parts of sodium silicate, 1-10 parts of sodium hexametaphosphate and 1-10 parts of L-ascorbic acid are uniformly mixed according to the mass parts to form the component A, wherein the component A is powder, and a grinding mixing method or a mechanical stirring mixing method can be adopted for mixing to ensure uniform mixing.
When the component B is processed, 10-20 parts of polyvinyl alcohol, 20-30 parts of hydrolyzed polymaleic anhydride and 5-10 parts of polyaspartic acid are prepared according to the mass part ratio; adding 10-20 parts of polyvinyl alcohol into deionized water according to the mass part ratio of 1:11.5 under the stirring state to be uniformly dispersed, then heating to more than 75 ℃, mechanically stirring until the polyvinyl alcohol is completely dissolved in the deionized water, cooling to 30 ℃, then adding 20-30 parts of hydrolyzed polymaleic anhydride and 5-10 parts of polyaspartic acid, and uniformly stirring to obtain a component B, wherein the component B is a solution. Preferably, the mass ratio of the component A to the component B is 1:12.5, the component A and the component B are respectively stored in a sealed and light-proof mode, and the component A and the component B are respectively added when modification is needed. Because of the physicochemical properties of L-ascorbic acid and sodium silicate, the prepared powder a is easy to absorb water and wet and is not suitable for long-term storage; before using, the solution b should be checked whether the system is uniform or not, and whether sedimentation occurs or not.
The hydrolyzed polymaleic anhydride, sodium hexametaphosphate and L-ascorbic acid belong to metal ion chelating agents, can be chelated with metal ions carried in machine-made sand powder to form stable metal salts which exist in a concrete system, so that the absorption of stone powder to calcium ions in a solution is reduced, and meanwhile, the double absorption of the water reducer is reduced.
The polyquaternary ammonium salt and the polyaspartic acid are dispersing agents, so that the stone powder can be uniformly dispersed in a concrete system, and the condition of agglomeration and sedimentation is avoided. The polyquaternary ammonium salt has good solubility in water, good clay stripping effect and certain dispersing and penetrating effects, and various products, such as a 4 th-generation product which is a double-long-chain quaternary ammonium salt, are in various combination forms such as dioctyl, didecyl, didodecyl, octyl decyl and the like: bis (sunflower-based) dimethyl ammonium bromide, bis (sunflower-based) dimethyl ammonium chloride, dimethyl benzyl ammonium chloride, bis (dodecyl dimethyl) ethylene diammonium bromide, 2-mono (2-phenoxyethoxy) ethyl trimethyl ammonium chloride, and mixtures of alkyl dimethyl benzyl ammonium chloride and octyl sunflower-based dimethyl ammonium chloride, etc., can be selected according to the type of concrete and the price budget; polyaspartic Acid (PASP) is a pure natural green polypeptide compound, and the molecular structure of the PASP contains a large number of carboxyl groups and peptide bonds, and is commonly used for water treatment, fertilizer slow release agents, drilling fluid viscosity reducers, coal water slurry dispersants, washing synergists and the like, and has good dispersing effect.
The sodium polyacrylate grafted starch is prepared by the reaction of sodium polyacrylate and starch, has good water absorption and water retention effects, can be well compounded with a chelating agent and a water reducing agent, effectively enhances the water retention and working performance of concrete, has good biodegradability, and is an environment-friendly additive.
Sodium silicate and polyvinyl alcohol are used as viscosity regulator in the system, the polyvinyl alcohol cannot be dissolved in water at normal temperature, the aqueous solution can be dissolved when the temperature is raised to 75 ℃ or above, the 8% polyvinyl alcohol aqueous solution system has stable viscosity, and the viscosity of the concrete can be obviously increased.
Example 2
A preparation method of a machine-made sand powder modifier comprises the steps of processing an A component and a B component respectively;
when the component A is processed, 20-30 parts of sodium polyacrylate grafted starch, 5-10 parts of polyquaternium, 5-10 parts of sodium silicate, 1-10 parts of sodium hexametaphosphate and 1-10 parts of L-ascorbic acid are uniformly mixed according to the mass parts to form the component A, wherein the component A is powder, and a grinding mixing method or a mechanical stirring mixing method can be adopted for mixing to ensure uniform mixing.
When the component B is processed, 10-20 parts of polyvinyl alcohol, 20-30 parts of hydrolyzed polymaleic anhydride and 5-10 parts of polyaspartic acid are prepared according to the mass part ratio; adding 10-20 parts of polyvinyl alcohol into deionized water according to the mass part ratio of 1:11.5 under the stirring state to be uniformly dispersed, then heating to above 90 ℃, mechanically stirring until the polyvinyl alcohol is completely dissolved in the deionized water, then adding 20-30 parts of hydrolyzed polymaleic anhydride and 5-10 parts of polyaspartic acid after the temperature is reduced to 30 ℃, and uniformly stirring to obtain a component B, wherein the component B is a solution. Preferably, the mass ratio of the component A to the component B is 1:12.5, the component A and the component B are respectively stored in a sealed and light-proof mode, and the component A and the component B are respectively added when modification is needed.
Example 3
A preparation method of machine-made sand concrete is characterized in that an A component and a B component of the machine-made sand powder modifier in the embodiment 1 are respectively added, and the method comprises the following steps:
step 1, adding cement, admixture, machine-made sand and component A into a mixer, and pre-mixing to form a mixed material C, wherein the cement is Portland cement, and the admixture is at least one of fly ash and slag micropowder;
step 2, the component B and the water reducing agent are put into water and mixed uniformly to form an additive D, wherein the content of the additive D is the water content obtained by subtracting the water content of the component B from the total water content; the water reducer is a polycarboxylic acid water reducer, and the water reducing rate is 30% -40%;
step 3, adding the additive D into a stirrer, and uniformly stirring with the mixture C to obtain a mixture E;
and step 4, adding coarse aggregate into the mixed material E and stirring to obtain machine-made sand concrete.
Preferably, the cement content is 14.9-38.9%, the admixture content is 0-21.9%, the fine aggregate content is 32.1-71.7%, the coarse aggregate content is 0-45.7%, and the water reducer content is 0.3-0.53% by weight; the content of the machine-made sand powder modifier is 0.0073 per mill-0.011 per mill of the mass of the fine aggregate; the residual content of the concrete is water.
The present embodiment is further illustrative of the present invention and is not to be construed as limiting the invention, and those skilled in the art can make no inventive modifications to the present embodiment as required after reading the present specification, but only as long as they are within the scope of the claims of the present invention.
Claims (9)
1. The preparation method of the machine-made sand powder modifier is characterized in that the modifier comprises a component A and a component B, and the component A and the component B are respectively processed;
when the component A is processed, according to the mass portion ratio, 20 to 30 portions of sodium polyacrylate grafted starch, 5 to 10 portions of polyquaternium, 5 to 10 portions of sodium silicate, 1 to 10 portions of sodium hexametaphosphate and 1 to 10 portions of L-ascorbic acid are uniformly mixed to form the component A;
when the component B is processed, 10-20 parts of polyvinyl alcohol, 20-30 parts of hydrolyzed polymaleic anhydride and 5-10 parts of polyaspartic acid are prepared according to the mass part ratio; adding polyvinyl alcohol into deionized water according to the mass ratio of 1:11.5 under the stirring state, dispersing uniformly, heating to above 75 ℃, mechanically stirring until the polyvinyl alcohol is completely dissolved in the deionized water, cooling to 30 ℃, adding hydrolyzed polymaleic anhydride and polyaspartic acid, and stirring uniformly to obtain a component B.
2. The method for preparing the machine-made sand powder modifier according to claim 1, wherein the mass ratio of the component A to the component B is 1:12.5.
3. A machine-made sand powder modifier, characterized in that the modifier is prepared according to the method of claim 1 or 2.
4. A method for preparing machine-made sand concrete, characterized in that component a and component B of a machine-made sand powder modifier are added separately, the machine-made sand powder modifier is as claimed in claim 3, the method comprises:
step 1, mixing cement, an admixture, machine-made sand and a component A to form a mixture C;
step 2, adding the component B and the water reducer into water, and uniformly mixing to form an additive D;
step 3, uniformly stirring the additive D and the mixture C to obtain a mixture E;
and step 4, adding coarse aggregate into the mixed material E and stirring to obtain machine-made sand concrete.
5. The preparation method of machine-made sand concrete according to claim 4, wherein the cement content is 14.9-38.9%, the admixture content is 0-21.9%, the fine aggregate content is 32.1-71.7%, the coarse aggregate content is 0-45.7%, and the water reducing agent content is 0.3-0.53% by weight; the content of the machine-made sand powder modifier is 0.0073-0.011 per mill of the mass of the fine aggregate; the residual content of the concrete is water.
6. The method for preparing machine-made sand concrete according to claim 5, wherein the admixture is at least one of fly ash and slag micropowder.
7. The method for preparing machine-made sand concrete according to claim 5, wherein the water reducer is a polycarboxylic acid water reducer, and the water reducing rate is 30% -40%.
8. The method for preparing machine-made sand concrete according to claim 5, wherein the cement is Portland cement.
9. The method according to claim 5, wherein in the step 2, the additive D is prepared by subtracting the water content of the component B from the total water content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311607669.2A CN117800639A (en) | 2023-11-29 | 2023-11-29 | Modifier preparation method, modifier and machine-made sand concrete preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311607669.2A CN117800639A (en) | 2023-11-29 | 2023-11-29 | Modifier preparation method, modifier and machine-made sand concrete preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117800639A true CN117800639A (en) | 2024-04-02 |
Family
ID=90422518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311607669.2A Pending CN117800639A (en) | 2023-11-29 | 2023-11-29 | Modifier preparation method, modifier and machine-made sand concrete preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117800639A (en) |
-
2023
- 2023-11-29 CN CN202311607669.2A patent/CN117800639A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111056776B (en) | High slump retaining recycled concrete and preparation method thereof | |
| CN111302708B (en) | Comprehensive utilization technology of large-volume lithium slag waste and implementation method thereof | |
| CN105110687A (en) | Mud resisting and slump retaining type polycarboxylic acids water reducer and preparation method thereof | |
| CN108218264A (en) | It is a kind of using lime-sodium carbonate as the one-component alkali-activated carbonatite cementitious material of exciting agent | |
| CN110937839A (en) | Synergist for recycled aggregate concrete and preparation method thereof | |
| CN115772010B (en) | Deflocculant for efficiently treating flocculation material in water-washed sand for building concrete and preparation method thereof | |
| CN105622023A (en) | Silt curing agent using furnace slags | |
| CN111116154B (en) | Early-strength cement-based grouting material prepared from pre-hydrated fly ash and preparation method thereof | |
| CN111018395A (en) | Corrosion-inhibition slow-setting synergistic cement water reducer and preparation method thereof | |
| CN112374711A (en) | Sludge curing agent based on industrial waste residues and application method thereof | |
| CN113354376B (en) | Phosphogypsum-based aggregate and preparation method thereof | |
| CN113105149A (en) | Concrete glue reducing agent and preparation method and application method thereof | |
| CN110510986B (en) | Modified paste filling material based on magnesium oxychloride gelling system and preparation method thereof | |
| CN117800639A (en) | Modifier preparation method, modifier and machine-made sand concrete preparation method | |
| CN113880484B (en) | Additive for improving mechanical strength of high belite sulphoaluminate cement | |
| CN107117845B (en) | Method for inhibiting alkali silicic acid reaction of concrete | |
| CN114057418A (en) | Anti-segregation type special cementing material suitable for coarse tailings and suitable for filling | |
| CN111908822B (en) | Slump-retaining concrete synergist and preparation method thereof | |
| CN103387350B (en) | Environment-friendly low-alkali CL-free accelerator | |
| KR20140103760A (en) | Soil concrete agent for deep cement mixing method | |
| CN112919846A (en) | Method for preparing concrete admixture from tailings | |
| CN110845663A (en) | Concrete anti-mud agent | |
| CN111704413A (en) | Concrete prepared from waste slurry of concrete mixing plant | |
| CN115073025B (en) | Low-retarding high-initial-activity phosphorus slag powder and preparation method thereof | |
| CN116023062B (en) | Water-based synergist for concrete 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 |