CN1587176A - High efficiency mortar additive for lignin series air-entraining concrete and its preparing method - Google Patents
High efficiency mortar additive for lignin series air-entraining concrete and its preparing method Download PDFInfo
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Abstract
The efficient lignin additive for aerated concrete mortar is used to raising the flowability and strength of laying and plastering mortar. The present invention features that the efficient mortar additive has lignin sulfonate as main component as well as oxidant, catalyst, condensating agent, sulfonating agent, surfactant, polymer and is prepared through catalytic oxidation, sulfomethylation and condensation. The efficient mortar additive can raise the flowability of mortar, raise its strength, retard setting, decrease crack caused by temperature change, adhere mortar, eliminate separation and lamination and raise anti-seepage capacity. The present invention is suitable for aerated concrete laying and plastering mortar.
Description
Technical field
The present invention relates to a kind of gas concrete builds by laying bricks or stones and motar efficient additive and preparation method thereof.More particularly, the present invention relates to the byproduct Sulfite lignin of pulping and paper-making and make efficient mortar additive cheaply.
Background technology
Gas concrete is as a kind of new green environment protection materials for wall, has that intensity height, cost are low, an advantage such as light weight, heat insulating, sound insulation, fire performance are good, in building material market wide application prospect arranged.But because air-entrained concrete building block has the microvoid structure of sealing, absorption speed is slower, characteristics such as the cubic deformation coefficient is bigger than normal, material is more crisp, use ordinary mortar to build by laying bricks or stones or plastering construction, problem such as have that dehydration is fast, bonding is not firm, the slurry seam is difficult for fullly tamping, intensity is on the low side, cause body of wall to have serious cracking, hollowing even come off and the seepage phenomenon, had a strong impact on applying of construction quality and restriction gas concrete.
Ordinary mortar is formulated by a certain percentage by gelling material, fine aggregate and water, and workability is poor, and palpus a certain amount of lime putty of admixture or clay puddle are improved its workability, water-retentivity and flowability usually.But the lime quality instability causes low, the bad adhesion of mortar strength prepared, influences the masonry project quality; And dust is big during the lime powder admixture, and the working-yard labor condition is poor, and environmental pollution is serious, is unfavorable for civilized construction, and present many cities have banned use of lime putty.Therefore traditional building mortar can not satisfy the demand of modern architecture development.
Mix a small amount of admixture and can obviously improve mortar workability and serviceability in mortar, improve operating efficiency, and can save lime putty, protection environment, minimizing energy consumption, reduction engineering cost have obtained using widely in the mortar construction.At present the rate of utilization of national admixtures such as Northern Europe, Japan, Australia almost reaches 100%, and the rate of utilization that the U.S., Canada, Germany, Russia such as reach at country also is roughly 50%～80%, and the rate of utilization of China only reaches 20%.
1999, " New Building Materials " the 8th interim " performance study of efficient additive for building mortar " announced SG series mortar additive, it is the hydration mechanism according to cement mixture, selects for use proprietary materials such as multiple inorganic materials, organic polymer, tensio-active agent, coupling additive agent formulated.
Chinese patent CN 1291597A, " additive for motar of air-entrained concrete " (application number: 00118934.4) that announce April 18 calendar year 2001, its feedstock composition has: polyethylene, methylcellulose gum, tripolyphosphate calcium, borax, water glass and water, be used for motar of air-entrained concrete, mortar additive is mainly finely divided water-soluble organic polymer, it forms latax in water, all kinds of materials had advantages of good caking property, but the bleed effect meeting of polymkeric substance increases the mortar porosity, ultimate compression strength is lower, volume is usually 5%～10%, and cost is big.
The mortar additive kind also has water-resisting agent and swelling agent.Water-resisting agent can generate subparticle with the cement reaction and fill the mortar hole, or itself is the hydrophobic nature material, and its permeable pressure ratio can reach 300%, improves the mortar anti-permeability performance.Use more widely that water-resisting agent is methyl silanol salt and containing hydrogen silicone oil emulsion, the alkalescence of methyl silanol salt is too strong and the containing hydrogen silicone oil emulsion can generate hydrogen under the mortar alkaline condition, all can damage the mortar quality.Swelling agent (calcium sulphoaluminate class, calcium oxide, magnesium oxide class, metal species) produces things such as a large amount of ettringite or calcium hydroxide in hydration process, produce certain expansion, the mortar middle and later periods of significantly reducing under early-age shrinkage and the wet condition shrinks, the shrinkage ratio that can make 28 days improves anti crack performance and anti-permeability performance less than 125.But under drying conditions, can not reduce even strengthen contraction, the later stage anti-permeation cracking-resistant of mortar is but had adverse influence.
Water reducer has favourable absorption dispersion, moistening and lubrication to cement, and the flowability of new sand cutting slurry is significantly improved, and can improve the early strength of mortar simultaneously.Some mortar additives are main component with the water reducer, with colophonium pyrolytic polymer and tensio-active agent is the bleed component, compoundly then increase sad dose, retardant etc. with a certain amount of curing accelerator, water conservation, the mortar of preparing has workability and anti-crack and anti-seepage performance preferably, but because this class admixture belongs to the composite of several materials, unstable product quality.The high efficiency water reducing agent major part of using at present is aromatic sulphonate formaldehyde condensation products such as FDN etc. in addition, and water-reducing rate can reach more than 20%, but easily produces bleeding and segregation layering, mortar is shunk to be increased, cause the mortar body of wall crack to occur, bad to the cohesiveness of body of wall, be difficult to prepare High Performance Mortar.In addition, be main raw material with petrochemicals such as naphthalene, anthracene and derivatives thereof, price is higher, has certain toxicity.Along with the shortage of world resource and the raising day by day of people's environmental consciousness, just more and more come into one's own with application for the research that with biomass is the green admixture of raw material.
All kinds of modified lignins in the spent pulping liquor are as the existing nearly 60 years history of cement water reducing agent.But because its water-reducing rate is low, slow setting, little to cement, mortar ultimate compression strength increase rate, early strength is on the low side, uses to be restricted in mortar, also influences the raising of himself value.Chinese patent CN 1107814A, relate to mortar additive for building September 6 nineteen ninety-five disclosed " efficient mortar additive ", it is that tankage reed pulp waste liquid with papermaking is a main raw material, be equipped with soda ash, rosin, colloidal liquid or coccoid that trolamine is formed, it is characterized in that in admixture, being furnished with two kinds of compositions of tall oil and sodium lauryl sulfate, this patent does not carry out chemical modification to improve its diminishing dispersing property to cement and mortar to pulping waste liquor, mix in the mortar with micro foam agent, improve the workability of mortar, improve water-retentivity, dosage too much can obviously reduce the intensity and the cohesiveness of mortar.
Summary of the invention
The objective of the invention is to provide a kind of lignin at the deficiencies in the prior art is the gas concrete efficient mortar additive, in mortar, introduce a certain amount of small CAB, improve the microtexture of mortar, can not reduce the intensity of mortar, can improve the impervious ability of mortar; Its main raw material Sulfite lignin are byproducts of chemical pulping, and raw material sources are abundant, nontoxic, cost is low.
The present invention also aims to provide described lignin is the preparation method of gas concrete with efficient mortar additive
To be gas concrete comprise the steps: with the preparation method of efficient mortar additive lignin of the present invention
(1) water of weight such as in the Sulfite lignin solid, adds, regulate pH to 6～7, add catalyzer, oxygenants down, reacted 20-40 minute at 65～85 ℃;
(2) be warming up to 70～95 ℃, add aldehydes and sulphonating agent, carried out sulfomethylation 0.5～1 hour;
(3) regulating pH is 3～4, carries out condensation reaction 1-2 hour; Regulating pH is 6～7, adds surfactant and high molecular polymer, stirs 20～30 minutes, and cooling obtains liquid product of the present invention.
Described liquid product is carried out spraying drying but obtain powder-like product;
The weight proportion of said components is as follows:
100 parts of Sulfite lignin
Catalyzer 0.5-5 part
Oxygenant 3-20 part
Aldehydes 3-20 part
Sulphonating agent 5-20 part
Surfactant 1-5 part
High molecular polymer 0.5-5 part
Sulfite lignin refer to: a kind of more than one mixtures in calcium lignosulfonate, sodium lignosulfonate, the lignosulfonic acid magnesium,
Catalyzer refers to: one or more mixtures in sulfurous acid iron, ferric sulfate, iron(ic) chloride, cupric nitrate, the Sodium Nitrite,
Oxygenant refers to: one or more mixtures in hydrogen peroxide, ammonium persulphate, Potassium Persulphate, the ozone,
Aldehydes refers to: formaldehyde, acetaldehyde, oxalic dialdehyde, one or more mixtures in the propionic aldehyde, butyraldehyde, isobutyric aldehyde, glutaraldehyde,
Sulphonating agent refers to: one or more mixtures in Sulfothiorine, sulphite, sodium bisulfite, thionamic acid, the thionamic acid sodium,
High molecular polymer refers to: one or more mixtures in carboxymethyl cellulose, hydroxyethylmethyl-cellulose, Vltra tears, the polyvinyl alcohol,
Surfactant refers to: one or more mixtures in sodium lauryl sulphate, sodium alkyl sulfate, lauryl alcohol polyethenoxy ether sodium sulfate, Oleum Cocois alkylol amide, the fatty alcohol-polyoxyethylene ether.
Lignin of the present invention be efficient mortar additive the preparation method more specifically the preparation method be:
(1) gets 100 parts Sulfite lignin solid, add 100 parts water, to add massfraction be that to regulate pH be 6～7 for 20% NaOH solution, be heated to certain service temperature while stirring, service temperature is controlled at 65～85 ℃, adds 0.5～5 part of catalyzer, 3-20 part oxygenant in reaction kettle for reaction 20-40 minute;
(2) sulphonating agent that is warming up to 70～95 ℃ of aldehydes that add 3-20 part then and 5-20 part carried out sulfomethylation 0.5～1 hour in reactor;
(3) adding concentration is the sulphuric acid soln of 0.1mol/L, regulating pH and be 3～4 carried out condensation reaction 1-2 hour, adding massfraction and be 20% NaOH solution, to regulate pH be 6～7, surfactant of 1-5 part and the high molecular polymer of 0.5-5 part will be added in the above-mentioned reaction product, and stirred fast 20～30 minutes, obtain the liquid product of mortar additive of the present invention after the cooling.
Liquid product carries out spraying drying but can get powder-like product of the present invention.
Characteristics of the present invention are to be main raw material with Sulfite lignin, through catalyzed oxidation, sulfomethylation, condensation reaction, make the Sulfite lignin condenses, be equipped with surfactant and high molecular polymer, the lignin that makes is that gas concrete has suitable hydrophilic, lipophilic group with mortar additive, be to have the large space steric hindrance type of chain-like structure of phenyl ring and the polymkeric substance that suitable molecular weight distributes, can increase its adsorptive capacity and bonding strength on cement granules, strengthen the diminishing dissemination, cement is fully contacted with water, and cement can obtain sufficient hydration reaction; Reduce the sand-cement slurry unit consumption of water, improved the intensity of mortar, also can in mortar, introduce a certain amount of small, stable, CAB, improve the microtexture of mortar, improve its impervious ability, the present invention can make admixture have higher sulfonation degree and than high molecular weight, increased cohesive action to mortar, reduce the mortar bleeding rate, eliminate segregation and demixing phenomenon, improve tensile strength and impervious ability, build purpose with the anticracking of motar, enhancing, impervious and waterproof by laying bricks or stones thereby reach gas concrete.
Lignin of the present invention be gas concrete with efficient mortar additive can dry powder or aqueous solution form be added in the mortar mix, its massfraction is that volume is 0.2%～0.7% of a cement quality, optimum volume is 0.3%～0.5%.
The present invention's advantageous effect compared with prior art: compare with the existing mortar additive that contains micro foam agent, when cement-sand ratio is low, have outside the higher water-reducing rate, can also improve the intensity of mortar; Have certain delayed coagulation, delay the appearance of hydrated cementitious thermal spike, reduce the crack that temperature variation causes; Product of the present invention has the dispersion cohesive action to mortar, especially when cement-sand ratio is low, when mixing the serious bleeding segregation of micro foam agent, can reduce the free-water of new sand cutting slurry effectively, makes that mortar becomes evenly, thickness, eliminates segregation and demixing phenomenon, improves impervious ability.The mortar additive that contains micro foam agent, because bleed is too big, in mortar, introduce open pores, reduce the intensity and the anti-permeability performance of mortar, be difficult to be applicable to that gas concrete is built by laying bricks or stones and motar, efficient mortar additive of the present invention is introduced a certain amount of small CAB in mortar, improves the microtexture of mortar, can not reduce the intensity of mortar, can improve the impervious ability of mortar; The raw material of existing mortar additive mainly is a petroleum chemicals, certain toxicity is arranged, cost is higher, and lignin of the present invention is the main raw material Sulfite lignin of efficient mortar additive is the byproduct of chemical pulping, raw material sources are abundant, nontoxic, cost is low, are that present gas concrete is built by laying bricks or stones and motar ideal admixture comparatively.
Embodiment
Embodiment 1
Get the calcium lignosulfonate solids of 100 grams, add 100 grams water, add massfraction be 20% NaOH solution to regulate pH be 6～7, be heated to certain service temperature while stirring, service temperature is controlled at 80 ℃; Add 0.5 gram sulfurous acid iron and 0.5 gram cupric nitrate, 10 gram hydrogen peroxide in reaction kettle for reaction 30 minutes, heat up 90 ℃, the sodium bisulfite that adds 10 gram formaldehyde and 10 grams then, carried out sulfomethylation 0.5 hour, add the sulphuric acid soln that concentration is 0.1mol/L then, regulate pH and be 3～4 and carried out condensation reaction 1-2 hour, adding massfraction and be 20% NaOH solution, to regulate pH be 6～7.To add sodium lauryl sulphate, the sodium alkyl sulfate of 2 grams, the 1 gram carboxymethyl cellulose of 1 gram in the above-mentioned reaction product, and stirred fast 20 minutes, can obtain the liquid product of mortar additive of the present invention after the cooling.Carry out spraying drying and but can get powder-like product of the present invention.
Embodiment 2
Get the sodium lignosulfonate solids of 100 grams, add 100 grams water, add massfraction be 20% NaOH solution to regulate pH be 6～7, be heated to certain service temperature while stirring, service temperature is controlled at 80 ℃; Add 0.5 gram sulfurous acid iron and 0.5 gram cupric nitrate, 10 gram hydrogen peroxide in reaction kettle for reaction 30 minutes, heat up 90 ℃, the S-WAT that adds 10 gram formaldehyde and 10 grams then, carried out sulfomethylation 0.5 hour, add the sulphuric acid soln that concentration is 0.1mol/L then, regulate pH and be 3～4 and carried out condensation reaction 1-2 hour, adding massfraction and be 20% NaOH solution, to regulate pH be 6～7.Sodium lauryl sulphate, the fatty alcohol-polyoxyethylene ether of 2 grams, the 2 gram Vltra tearss of 1 gram will be added in the above-mentioned reaction product, and stirred fast 20 minutes, can obtain the liquid product of mortar additive of the present invention after the cooling, carry out spraying drying and but can get powder-like product of the present invention.
Embodiment 3
Get the lignosulfonic acid magnesium solids of 100 grams, add 100 grams water, add massfraction be 20% NaOH solution to regulate pH be 6～7, be heated to certain service temperature while stirring, service temperature is controlled at 80 ℃; Add 0.5 gram iron trichloride and 1 gram cupric nitrate, 5 gram ammonium persulphates in reaction kettle for reaction 30 minutes, heat up 90 ℃, the thionamic acid sodium that adds 15 gram formaldehyde and 5 grams then, carried out sulfomethylation 0.5 hour, add the sulphuric acid soln that concentration is 0.1mol/L then, regulate pH and be 3～4 and carried out condensation reaction 1-2 hour, adding massfraction and be 20% NaOH solution, to regulate pH be 6～7.The lauryl alcohol polyethenoxy ether sodium sulfate of 2 grams, the sodium alkyl sulfate of 1 gram, the hydroxyethylmethyl-cellulose of 1.5 grams will be added in the above-mentioned reaction product, and stirred fast 20 minutes, can obtain the liquid product of mortar additive of the present invention after the cooling, carry out spraying drying and but can get powder-like product of the present invention.
Embodiment 4
Get the calcium lignosulfonate solids of 100 grams, add 100 grams water, add massfraction be 20% NaOH solution to regulate pH be 6～7, be heated to certain service temperature while stirring, service temperature is controlled at 80 ℃; Add 0.5 gram sulfurous acid iron and 1 gram cupric nitrate, 10 gram hydrogen peroxide in reaction kettle for reaction 30 minutes, heat up 90 ℃, the sodium bisulfite that adds 10 gram formaldehyde and 10 grams then, carried out sulfomethylation 0.5 hour, add the sulphuric acid soln that concentration is 0.1mol/L then, regulate pH and be 3～4 and carried out condensation reaction 1-2 hour, adding massfraction and be 20% NaOH solution, to regulate pH be 6～7.The fatty alcohol-polyoxyethylene ether of 1 gram, sodium alkyl sulfate, 1 gram carboxymethyl cellulose and the 1 gram polyvinyl alcohol of 1 gram will be added in the above-mentioned reaction product, and stirred fast 20 minutes, can obtain the liquid product of mortar additive of the present invention after the cooling, carry out spraying drying and but can get powder-like product of the present invention.
Below use a series of tests of efficient mortar additive of the present invention, its effect has been described.
Product of the present invention is to the influence of mortar degree of mobilization during table 1 waterproof mortar in different cement-sand
The volume of water consumption admixture (accounts for cement quality, %)
Cement: sand
ml 0.10 0.20 0.30 0.40 0.50
1∶2 187 125 140 163 153 170
1∶4 187 160 220 220 210 217
1∶5 187 180 225 240 250 253
1∶6 160 120 170 193 192 206
Table 1 explanation product of the present invention can significantly improve the flowability of mortar.
Table 2 efficient mortar additive of the present invention and other admixture are to the influence of mortar physicals
Admixture dosage, denseness, water-reducing rate, bleeding rate, delamination degree time of coagulation,, min
% cm % % cm initial set final set
Cement sand 0 5.0 0 5.67 2.32 100 230
Slurry
Certain little foam 0.20 5.5 24.0 2.48 1.10 105 240
Agent 0.30 5.8 26.2 2.54 1.25 110 245
The present invention 0.20 5.6 32.0 1.90 0.8 130 250
Product 0.30 6.1 33.3 1.50 0.60 145 270
Annotate: cement: sand=1: 3
Compare with other mortar additive as can be seen from Table 2, product of the present invention can have higher water-reducing rate, has reached the effect that reduces segregation, bleeding and the demixing phenomenon of mortar, has certain retarding performance.
Table 3 efficient mortar additive of the present invention and other admixture are to the influence of mortar mechanical property
3 days sticking sclerosis mortar Cl of admixture
-Ooze
Ultimate compression strength, MPa/ compressive strength rate osmotic pressure
The saturating height of volume knotting strength of mortar kind, mm
Force rate, %
％ MPa 3d 7d 28d 50d 90d
Sand-cement slurry 0 0.20 7.47/100 9.70/100 16.12/100 13.3 23.3 100
Cheng Mo does not open
Lime mortar 0 2.50/44.4 3.44/35.4 4.85/30.1 14.2 32.5 50
Split
Mix 0.20 0.12 4.47/59.8 6.73/69.4 9.08/56.3 10.2 15.3 135 of micro foam agent
Sand-cement slurry 0.30 0.23 3.65/48.8 5.36/55.3 8.32/51.6 9.5 14.5 150
Mix the present invention and produce 0.20 0.36 8.23/110 10.94/113 18.42/114 8.5 9.2 320
The cement sand of product
0.30 0.42 8.82/118 11.21/116 19.23/120 8.2 8.6 330
Slurry
Annotate: cement: sand=1: 3; Lime: cement: sand=1: 1: 3
Table 3 explanation product of the present invention has the effect that improves mortar bonding intensity, ultimate compression strength and impervious ability.
Claims (3)
1, a kind of lignin is the preparation method of gas concrete with efficient mortar additive, it is characterized in that comprising the steps:
(1) water of weight such as in the Sulfite lignin solid, adds, regulate pH to 6～7, add catalyzer, oxygenants down, reacted 20-40 minute at 65～85 ℃;
(2) be warming up to 70～95 ℃, add aldehydes and sulphonating agent, carried out sulfomethylation 0.5～1 hour;
(3) regulating pH is 3～4, carries out condensation reaction 1-2 hour; Regulating pH is 6～7, adds surfactant and high molecular polymer, stirs 20～30 minutes, and cooling obtains liquid product of the present invention;
The weight proportion of said components is as follows:
100 parts of Sulfite lignin
Catalyzer 0.5-5 part
Oxygenant 3-20 part
Aldehydes 3-20 part
Sulphonating agent 5-20 part
Surfactant 1-5 part
High molecular polymer 0.5-5 part
Described Sulfite lignin refer to: one or more mixtures in calcium lignosulfonate, sodium lignosulfonate, the lignosulfonic acid magnesium;
Catalyzer refers to: one or more mixtures in sulfurous acid iron, ferric sulfate, iron(ic) chloride, cupric nitrate, the Sodium Nitrite;
Oxygenant refers to: one or more mixtures in hydrogen peroxide, ammonium persulphate, Potassium Persulphate, the ozone;
Aldehydes refers to: formaldehyde, acetaldehyde, oxalic dialdehyde, one or more mixtures in the propionic aldehyde, butyraldehyde, isobutyric aldehyde, glutaraldehyde;
Sulphonating agent refers to: one or more mixtures in Sulfothiorine, sulphite, sodium bisulfite, thionamic acid, the thionamic acid sodium;
High molecular polymer refers to: one or more mixtures in carboxymethyl cellulose, hydroxyethylmethyl-cellulose, Vltra tears, the polyvinyl alcohol;
Surfactant refers to: one or more mixtures in sodium lauryl sulphate, sodium alkyl sulfate, lauryl alcohol polyethenoxy ether sodium sulfate, Oleum Cocois alkylol amide, the fatty alcohol-polyoxyethylene ether.
2, lignin according to claim 1 is the preparation method of gas concrete with efficient mortar additive, it is characterized in that comprising the steps:
(1) gets 100 parts Sulfite lignin solid, add 100 parts water, to add massfraction be that to regulate pH be 6～7 for 20% NaOH solution, be heated to certain service temperature while stirring, service temperature is controlled at 65～85 ℃, adds 0.5～5 part of catalyzer, 3-20 part oxygenant in reaction kettle for reaction 20-40 minute;
(2) sulphonating agent that is warming up to 70～95 ℃ of aldehydes that add 3-20 part then and 5-20 part carried out sulfomethylation 0.5～1 hour in reactor;
(3) adding concentration is the sulphuric acid soln of 0.1mol/L, regulating pH and be 3～4 carried out condensation reaction 1-2 hour, adding massfraction and be 20% NaOH solution, to regulate pH be 6～7, surfactant of 1-5 part and the high molecular polymer of 0.5-5 part will be added in the above-mentioned reaction product, and stirred fast 20～30 minutes, obtain the liquid product of mortar additive of the present invention after the cooling.
3, the lignin of claim 1 or 2 described method preparations is the gas concrete efficient mortar additive.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1321931C (en) * | 2005-09-27 | 2007-06-20 | 广东省造纸研究所 | High efficiency cement water reducing agent containing non-woody magnesium lignosulfonate |
| CN100347139C (en) * | 2006-06-20 | 2007-11-07 | 四川大学 | Polymer of fatty alcohol polyethenoxy ether class, and application as economization agent for concrete |
| CN101239837B (en) * | 2007-02-09 | 2010-11-03 | 徐东亮 | Honeycomb concrete and its preparation method |
| WO2011038426A2 (en) * | 2009-09-28 | 2011-03-31 | Pieter Gideo Van Der Merwe | Additive for cementitious and dust suppression compositions |
| CN102060481A (en) * | 2010-11-15 | 2011-05-18 | 北京新奥混凝土集团有限公司 | Low cementitious material self-compacting concrete |
| CN101391876B (en) * | 2008-08-04 | 2012-05-30 | 华南理工大学 | Dry powder mortar additive suitable for novel wall material and preparation method thereof |
| CN101905959B (en) * | 2010-01-11 | 2012-08-29 | 济南四建（集团）有限责任公司 | Dormant and awakening agents for cement concrete |
| CN103755211A (en) * | 2013-12-16 | 2014-04-30 | 华南理工大学 | Papermaking black liquid modification admixture for impervious mortar and preparation method thereof |
| CN104478280A (en) * | 2014-12-30 | 2015-04-01 | 福建清源科技有限公司 | Concrete synergist and preparation method thereof |
| CN108585610A (en) * | 2018-05-12 | 2018-09-28 | 唐世群 | A kind of repellant preparation method of concrete mortar |
| CN117567090A (en) * | 2024-01-15 | 2024-02-20 | 广州市克来斯特建材科技有限公司 | Preparation method of anti-segregation super-strong fluidity concrete |
| CN118164704A (en) * | 2024-05-14 | 2024-06-11 | 潍坊三建砼泰建筑材料有限公司 | High slump-retaining concrete water reducing agent |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1321931C (en) * | 2005-09-27 | 2007-06-20 | 广东省造纸研究所 | High efficiency cement water reducing agent containing non-woody magnesium lignosulfonate |
| CN100347139C (en) * | 2006-06-20 | 2007-11-07 | 四川大学 | Polymer of fatty alcohol polyethenoxy ether class, and application as economization agent for concrete |
| CN101239837B (en) * | 2007-02-09 | 2010-11-03 | 徐东亮 | Honeycomb concrete and its preparation method |
| CN101391876B (en) * | 2008-08-04 | 2012-05-30 | 华南理工大学 | Dry powder mortar additive suitable for novel wall material and preparation method thereof |
| WO2011038426A2 (en) * | 2009-09-28 | 2011-03-31 | Pieter Gideo Van Der Merwe | Additive for cementitious and dust suppression compositions |
| WO2011038426A3 (en) * | 2009-09-28 | 2011-06-09 | Pieter Gideo Van Der Merwe | Additive for cementitious and dust suppression compositions |
| CN101905959B (en) * | 2010-01-11 | 2012-08-29 | 济南四建（集团）有限责任公司 | Dormant and awakening agents for cement concrete |
| CN102060481A (en) * | 2010-11-15 | 2011-05-18 | 北京新奥混凝土集团有限公司 | Low cementitious material self-compacting concrete |
| CN102060481B (en) * | 2010-11-15 | 2012-07-25 | 北京新奥混凝土集团有限公司 | Low cementitious material self-compacting concrete |
| CN103755211A (en) * | 2013-12-16 | 2014-04-30 | 华南理工大学 | Papermaking black liquid modification admixture for impervious mortar and preparation method thereof |
| CN104478280A (en) * | 2014-12-30 | 2015-04-01 | 福建清源科技有限公司 | Concrete synergist and preparation method thereof |
| CN108585610A (en) * | 2018-05-12 | 2018-09-28 | 唐世群 | A kind of repellant preparation method of concrete mortar |
| CN117567090A (en) * | 2024-01-15 | 2024-02-20 | 广州市克来斯特建材科技有限公司 | Preparation method of anti-segregation super-strong fluidity concrete |
| CN117567090B (en) * | 2024-01-15 | 2024-03-15 | 广州市克来斯特建材科技有限公司 | Preparation method of anti-segregation super-strong fluidity concrete |
| CN118164704A (en) * | 2024-05-14 | 2024-06-11 | 潍坊三建砼泰建筑材料有限公司 | High slump-retaining concrete water reducing agent |
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| CN1273406C (en) | 2006-09-06 |
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