CN114853386A - Additive for wet-mixed mortar of machine-made sand - Google Patents
Additive for wet-mixed mortar of machine-made sand Download PDFInfo
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- CN114853386A CN114853386A CN202210517439.6A CN202210517439A CN114853386A CN 114853386 A CN114853386 A CN 114853386A CN 202210517439 A CN202210517439 A CN 202210517439A CN 114853386 A CN114853386 A CN 114853386A
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to a machine-made sand wet-mixed mortar additive, which is prepared from the following raw materials in parts by weight, 40.00-70.00 parts of a polycarboxylic acid water reducing agent; 20.00-40.00 parts of polycarboxylic slump retaining agent; 2.00-6.00 parts of an organic retarder; 0.02-0.20 part of air entraining agent; 0.02-0.07 part of organic silicon defoaming agent; 1.00-10.00 parts of a water-retaining agent; 0.02-0.20 part of preservative; 10.00-15.00 parts of a mud inhibitor; water is added to 500 parts. The additive provided by the invention improves the water locking and retaining slump keeping performance of the wet-mixed mortar, inhibits the influence of machine-made sand on the working performance of the additive, and achieves the purposes of improving the stability of the wet-mixed mortar and avoiding the bleeding and layering of the wet-mixed mortar while not influencing the working performance of the wet-mixed mortar.
Description
Technical Field
The invention relates to the technical field of wet-mixed mortar, in particular to a machine-made sand wet-mixed mortar additive.
Background
The wet-mixed mortar is a mortar mixture which is prepared by metering and mixing a cementing material, a fine aggregate, an additive, water and various components determined according to performances in a mixing station, conveying the mixture to a use place by using a mixing transport vehicle, storing the mixture in a special container and finishing use within a specified time. At present, wet-mixed mortar is transported from a production point to a site for use, like premixed concrete, the requirement on the working performance of the wet-mixed mortar is high, certain operable time (namely open time) needs to be ensured, after the mortar is mixed with water, the mortar needs to have good enough workability before initial setting and be capable of normal construction and operation, and the requirements of an engineering structure on mechanical performance, durability and the like need to be met after hardening. Therefore, the construction of the wet-mixed mortar is adjusted according to the construction progress of the construction site, so that the admixture is added to ensure that the wet-mixed mortar is used at any time and in a constant state after being transported to the construction site.
The traditional wet-mixed mortar admixture is mainly formed by compounding a water reducing component, a thickening component, a retarding component and an air entraining component, wherein the thickening component and the air entraining component enable the viscosity of an admixture solution to rise, increase bubbles, cause the solution to be unstable, cause the layering phenomenon, and also are not beneficial to the storage and transportation of the mortar admixture. Due to the shortage of natural sand resources, inconvenience in transportation and the like, the existing wet-mixed mortar largely adopts machine-made sand instead of natural sand, the machine-made sand has the defects of irregular appearance, more edges and corners, poor water retention, heavy mud and powder content and the like, the adsorption capacity to an additive is large, and the simple mixing ratio adjustment has limitations, so that the development of the additive for the machine-made sand wet-mixed mortar is necessary.
Disclosure of Invention
The invention aims to solve the problems that the existing wet-mixed mortar added with the existing admixture is unstable, easy to separate and greatly influenced by machine-made sand, and the working performance of the wet-mixed mortar is not influenced.
The above object of the present invention is achieved by the following technical solutions:
the machine-made sand wet-mixed mortar additive is prepared from the following raw materials in parts by weight,
40.00-70.00 parts of a polycarboxylic acid water reducing agent;
20.00-40.00 parts of polycarboxylic slump retaining agent;
2.00-6.00 parts of an organic retarder;
0.02-0.20 part of air entraining agent;
0.02-0.07 part of organic silicon defoaming agent;
1.00-10.00 parts of a water-retaining agent;
0.02-0.20 part of preservative;
10.00-15.00 parts of a mud inhibitor;
water is added to 500 parts.
By adopting the technical scheme, firstly, thickening components which are not easy to exist stably with water are not added, the thickening effect is achieved by adding the polycarboxylic acid water reducing agent and the mud inhibitor, the mud inhibitor can adsorb the surface of machine-made sand, the electric charge of the machine-made sand is neutralized, the adsorption force of the machine-made sand on the polycarboxylic acid water reducing agent is reduced, and the compounded additive is stable and is not easy to layer; secondly, the opening time of the wet-mixed mortar is prolonged by combining the organic retarder with the polycarboxylic acid slump retaining agent and the water-retaining agent, so that the working performance of the wet-mixed mortar is ensured, the water locking and retaining performances of the wet-mixed mortar at the early stage and the later stage are improved, and the bleeding layer of the wet-mixed mortar is further avoided; thirdly, foam or large bubbles generated by preparing the admixture are taken out or inhibited through the organic silicon defoaming agent, and then small bubbles are introduced through the air entraining agent, so that the admixture has good workability, and simultaneously, the bubbles in the wet-mixed mortar can be stabilized, and the wet-mixed mortar is ensured to be used at any time and be in a constant state after being transported to a construction site; finally, the preservative is introduced, so that a wet-mixed mortar system can be stable for a long time, and the corrosion problem caused by scraping of a steel reinforcement framework by a machine-made sand corner can be relieved; in conclusion, the additive disclosed by the invention achieves the purposes of improving the stability of the wet-mixed mortar and avoiding the bleeding stratification of the wet-mixed mortar by improving the water locking, water retaining and slump retaining performances of the wet-mixed mortar and inhibiting the influence of machine-made sand on the working performance of the additive without influencing the working performance of the wet-mixed mortar.
Further, the polycarboxylate water reducer is a polycarboxylate water reducer synthesized from a prenyl polyoxyethylene ether macromonomer, a polycarboxylate water reducer synthesized from methyl allyl polyoxyethylene ether, or a styrene-cyclodextrin polycarboxylate water reducer.
Further, the polycarboxylic acid slump retaining agent is an ether polycarboxylic acid slump retaining agent.
Further, the organic retarder is sodium gluconate, sodium citrate or white sugar.
Further, the air entraining agent is prepared from the following raw materials in parts by weight, 10.00-20.00 parts of sodium dodecyl benzene sulfonate; 20.00-30.00 parts of hydrogenated rosin; 8.00-10.00 parts of sorbitol polyoxyethylene ether tetraoleate; water is added to 100 parts.
Furthermore, the preparation method of the air entraining agent comprises the following steps of adding the hydrogenated rosin into 20.00 parts of water, adding the sodium dodecyl benzene sulfonate and the sorbitol polyoxyethylene ether tetraoleate at the temperature of 80-120 ℃, adding the water to 100 parts, and uniformly stirring to obtain the air entraining agent.
Further, the organic silicon defoaming agent is a polyether modified organic silicon defoaming agent.
Further, the water-retaining agent is prepared from the following raw materials in parts by weight, wherein 30.00-50.00 parts of sodium polyacrylate grafted starch are added; 10.00-18.00 parts of activated clay; 5.00-15.00 parts of glycerin monostearate; 3.00-15.00 parts of calcium sulphoaluminate; 2.00-10.00 alkyl glycoside.
Furthermore, the preparation method of the water-retaining agent comprises the following steps of putting the sodium polyacrylate grafted starch, the activated clay, the glyceryl monostearate, the calcium sulphoaluminate and the alkyl glycoside into a stirring container, and uniformly stirring to obtain the water-retaining agent.
Further, the preservative is prepared from the following raw materials in parts by weight, and 50.00-60.00 parts of metal nano powder; 8.00-10.00 parts of bisimidazoline quaternary ammonium salt; 5.00-10.00 parts of didecyl dimethyl ammonium carbonate; 2.00-5.00 parts of sodium molybdate; 15.00-35.00 parts of metal oxide nano emulsion.
Furthermore, the preparation method of the preservative comprises the following steps of putting the metal nano powder, the bis-imidazoline quaternary ammonium salt, the didecyl dimethyl ammonium carbonate, the sodium molybdate and the metal oxide nano emulsion into a stirring container, and uniformly stirring to obtain the preservative.
Furthermore, the metal nano powder is nano zinc powder, and the metal oxide nano emulsion is nano zinc oxide emulsion.
Further, the mud inhibitor is prepared from the following raw materials in parts by weight, wherein the epichlorohydrin-dimethylamine copolymer is 4.00-6.00 parts; 4.00-6.00 parts of inorganic potassium salt; 20.00-30.00 parts of ethylenediamine tetramethylene phosphonate; water is added to 100 parts.
Furthermore, the preparation method of the mud inhibitor comprises the following steps of putting the epichlorohydrin-dimethylamine copolymer, the inorganic potassium salt and the ethylenediamine tetramethylene phosphonate into a stirring container, adding water to 100 parts, and uniformly stirring to obtain the mud inhibitor.
Further, the inorganic potassium salt is potassium nitrate, and the ethylene diamine tetra methylene phosphonate is ethylene diamine tetra methylene phosphonic acid.
In conclusion, the beneficial technical effects of the invention are as follows: the additive provided by the invention improves the water locking and retaining slump keeping performance of the wet-mixed mortar, inhibits the influence of machine-made sand on the working performance of the additive, and achieves the purposes of improving the stability of the wet-mixed mortar and avoiding the bleeding and layering of the wet-mixed mortar while not influencing the working performance of the wet-mixed mortar.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the functions of the invention clearer and easier to understand, the invention is further described in the following with the specific embodiments.
Examples
Example 1: the invention discloses a machine-made sand wet-mixed mortar additive, which is prepared from the following raw materials in parts by weight,
specifically, the preparation method of the admixture comprises the following steps,
s1, selecting a polycarboxylic acid water reducing agent synthesized by prenyl polyoxyethylene ether macromonomer as a polycarboxylic acid water reducing agent, selecting an ether polycarboxylic acid slump retaining agent as a polycarboxylic acid slump retaining agent, selecting sodium gluconate as an organic retarder, and selecting a polyether modified organic silicon defoaming agent as an organic silicon defoaming agent;
s2, adding 25.00 parts of hydrogenated rosin into 20.00 parts of water, adding 15.00 parts of sodium dodecyl benzene sulfonate and 9.00 parts of sorbitol polyoxyethylene ether tetraoleate at 80-120 ℃, adding 100 parts of water, and stirring uniformly to obtain the air entraining agent
S3 putting 40.00 parts of sodium polyacrylate grafted starch, 18.00 parts of activated clay, 15.00 parts of glyceryl monostearate, 3.00 parts of calcium sulfoaluminate and 3.00 parts of alkyl glycoside into a stirring container, and uniformly stirring to obtain the water-retaining agent.
S4 putting 50.00 parts of nano zinc powder, 9.00 parts of bis-imidazoline quaternary ammonium salt, 9.00 parts of didecyl dimethyl ammonium carbonate, 2.50 parts of sodium molybdate and 20.00 parts of nano zinc oxide emulsion into a stirring container, and uniformly stirring to obtain the preservative.
S5 the method comprises the steps of firstly putting 6.00 parts of epichlorohydrin-dimethylamine copolymer, 4.00 parts of potassium nitrate and 25.00 parts of ethylene diamine tetramethylene phosphonic acid sodium into a stirring container, then adding water to 100 parts, and uniformly stirring to obtain the mud retarder.
S6 adding 40.00 parts of polycarboxylic acid water reducing agent, 30.00 parts of polycarboxylic acid slump retaining agent, 6.00 parts of organic retarder, 0.20 part of air entraining agent, 0.06 part of organic silicon defoaming agent, 1.00 part of water-retaining agent, 0.20 part of preservative and 12.00 parts of mud blocking agent into a stirring container, adding water to 500 parts, and stirring and uniformly mixing to obtain the admixture.
Example 2: the invention discloses a machine-made sand wet-mixed mortar admixture, which is different from the embodiment 1 in that the preparation method of the admixture comprises the following steps,
s1, selecting a polycarboxylate superplasticizer synthesized from methyl allyl polyoxyethylene ether as a polycarboxylate superplasticizer, selecting an ether polycarboxylate slump retaining agent as a polycarboxylate slump retaining agent, selecting sodium citrate as an organic retarder, and selecting a polyether modified organic silicon defoaming agent as an organic silicon defoaming agent;
s2, adding 30.00 parts of hydrogenated rosin into 20.00 parts of water, adding 18.00 parts of sodium dodecyl benzene sulfonate and 10.00 parts of sorbitol polyoxyethylene ether tetraoleate at 80-120 ℃, adding 100 parts of water, and stirring uniformly to obtain the air entraining agent
S3 adding 35.00 parts of sodium polyacrylate grafted starch, 16.00 parts of activated clay, 10.00 parts of glyceryl monostearate, 5.00 parts of calcium sulfoaluminate and 5.00 parts of alkyl glycoside into a stirring container, and uniformly stirring to obtain the water-retaining agent.
S4 putting 55.00 parts of nano zinc powder, 10.00 parts of bis-imidazoline quaternary ammonium salt, 8.00 parts of didecyl dimethyl ammonium carbonate, 3.50 parts of sodium molybdate and 30.00 parts of nano zinc oxide emulsion into a stirring container, and uniformly stirring to obtain the preservative.
S5 the method comprises the steps of firstly putting 5.50 parts of epichlorohydrin-dimethylamine copolymer, 6.00 parts of potassium nitrate and 20.00 parts of ethylene diamine tetramethylene phosphonic acid sodium into a stirring container, then adding water to 100 parts, and uniformly stirring to obtain the mud retarder.
S6 adding 45.00 parts of polycarboxylic acid water reducing agent, 20.00 parts of polycarboxylic acid slump retaining agent, 5.00 parts of organic retarder, 0.40 part of air entraining agent, 0.07 part of organic silicon defoaming agent, 3.00 parts of water retaining agent, 0.40 part of preservative and 13.00 parts of mud blocking agent into a stirring container, adding water to 500 parts, and stirring and uniformly mixing to obtain the admixture.
Example 3: the invention discloses a machine-made sand wet-mixed mortar admixture, which is different from the embodiment 1 in that the preparation method of the admixture comprises the following steps,
s1, selecting a styrene-cyclodextrin polycarboxylic acid water reducing agent as a polycarboxylic acid water reducing agent, selecting an ether polycarboxylic acid slump retaining agent as a polycarboxylic acid slump retaining agent, selecting white sugar as an organic retarder, and selecting a polyether modified organic silicon defoaming agent as an organic silicon defoaming agent;
s2, adding 29.00 parts of hydrogenated rosin into 20.00 parts of water, adding 19.00 parts of sodium dodecyl benzene sulfonate and 8.00 parts of sorbitol polyoxyethylene ether tetraoleate at 80-120 ℃, adding 100 parts of water, and uniformly stirring to obtain the air entraining agent
S3 putting 45.00 parts of sodium polyacrylate grafted starch, 14.00 parts of activated clay, 5.00 parts of glyceryl monostearate, 7.00 parts of calcium sulfoaluminate and 8.00 parts of alkyl glycoside into a stirring container, and uniformly stirring to obtain the water-retaining agent.
S4 putting 60.00 parts of nano zinc powder, 8.00 parts of bis-imidazoline quaternary ammonium salt, 6.00 parts of didecyl dimethyl ammonium carbonate, 4.50 parts of sodium molybdate and 15.00 parts of nano zinc oxide emulsion into a stirring container, and uniformly stirring to obtain the preservative.
S5 the method comprises the steps of firstly putting 4.00 parts of epichlorohydrin-dimethylamine copolymer, 4.00 parts of potassium nitrate and 30.00 parts of ethylene diamine tetramethylene phosphonic acid sodium into a stirring container, then adding water to 100 parts, and uniformly stirring to obtain the mud retarder.
S6 adding 50.00 parts of polycarboxylic acid water reducing agent, 40.00 parts of polycarboxylic acid slump retaining agent, 4.00 parts of organic retarder, 0.60 part of air entraining agent, 0.02 part of organic silicon defoaming agent, 5.00 parts of water retaining agent, 0.60 part of preservative and 10.00 parts of mud blocking agent into a stirring container, adding water to 500 parts, and stirring and uniformly mixing to obtain the admixture.
Example 4: the invention discloses a machine-made sand wet-mixed mortar admixture, which is different from the embodiment 1 in that the preparation method of the admixture comprises the following steps,
s1, selecting a polycarboxylic acid water reducing agent synthesized by prenyl polyoxyethylene ether macromonomer as a polycarboxylic acid water reducing agent, selecting an ether polycarboxylic acid slump retaining agent as a polycarboxylic acid slump retaining agent, selecting sodium gluconate as an organic retarder, and selecting a polyether modified organic silicon defoaming agent as an organic silicon defoaming agent;
s2 adding 27.00 parts of hydrogenated rosin into 20.00 parts of water, adding 20.00 parts of sodium dodecyl benzene sulfonate and 9.00 parts of sorbitol polyoxyethylene ether tetraoleate into the mixture at 80-120 ℃, adding 100 parts of water into the mixture, and stirring the mixture uniformly to obtain the air entraining agent
S3 adding 30.00 parts of sodium polyacrylate grafted starch, 12.00 parts of activated clay, 10.00 parts of glyceryl monostearate, 10.00 parts of calcium sulfoaluminate and 2.00 parts of alkyl glycoside into a stirring container, and uniformly stirring to obtain the water-retaining agent.
S4 putting 52.00 parts of nano zinc powder, 8.50 parts of bis-imidazoline quaternary ammonium salt, 5.00 parts of didecyl dimethyl ammonium carbonate, 5.00 parts of sodium molybdate and 25.00 parts of nano zinc oxide emulsion into a stirring container, and uniformly stirring to obtain the preservative.
S5 the method comprises the steps of firstly putting 5.00 parts of epichlorohydrin-dimethylamine copolymer, 6.00 parts of potassium nitrate and 24.00 parts of ethylene diamine tetramethylene phosphonic acid sodium into a stirring container, then adding water to 100 parts, and uniformly stirring to obtain the mud retarder.
S6 adding 55.00 parts of polycarboxylic acid water reducing agent, 25.00 parts of polycarboxylic acid slump retaining agent, 3.00 parts of organic retarder, 0.80 part of air entraining agent, 0.03 part of organic silicon defoaming agent, 10.00 parts of water retaining agent, 0.80 part of preservative and 15.00 parts of mud blocking agent into a stirring container, adding water to 500 parts, and stirring and uniformly mixing to obtain the admixture.
Example 5: the invention discloses a machine-made sand wet-mixed mortar admixture, which is different from the embodiment 1 in that the preparation method of the admixture comprises the following steps,
s1, selecting a polycarboxylate superplasticizer synthesized from methyl allyl polyoxyethylene ether as a polycarboxylate superplasticizer, selecting an ether polycarboxylate slump retaining agent as a polycarboxylate slump retaining agent, selecting sodium citrate as an organic retarder, and selecting a polyether modified organic silicon defoaming agent as an organic silicon defoaming agent;
s2, adding 26.00 parts of hydrogenated rosin into 20.00 parts of water, adding 10.00 parts of sodium dodecyl benzene sulfonate and 9.50 parts of sorbitol polyoxyethylene ether tetraoleate into the mixture at 80-120 ℃, adding 100 parts of water, and uniformly stirring to obtain the air entraining agent
S3 putting 50.00 parts of sodium polyacrylate grafted starch, 10.00 parts of activated clay, 13.00 parts of glyceryl monostearate, 12.00 parts of calcium sulphoaluminate and 10.00 parts of alkyl glycoside into a stirring container, and uniformly stirring to obtain the water-retaining agent.
S4 putting 53.00 parts of nano zinc powder, 9.50 parts of bis-imidazoline quaternary ammonium salt, 7.00 parts of didecyl dimethyl ammonium carbonate, 4.00 parts of sodium molybdate and 35.00 parts of nano zinc oxide emulsion into a stirring container, and uniformly stirring to obtain the preservative.
S5 the method comprises the steps of firstly putting 4.50 parts of epichlorohydrin-dimethylamine copolymer, 6.00 parts of potassium nitrate and 26.00 parts of ethylene diamine tetramethylene phosphonic acid sodium into a stirring container, then adding water to 100 parts, and uniformly stirring to obtain the mud retarder.
S6, firstly putting 60.00 parts of polycarboxylic acid water reducing agent, 35.00 parts of polycarboxylic acid slump retaining agent, 2.00 parts of organic retarder, 1.00 part of air entraining agent, 0.05 part of organic silicon defoaming agent, 9.00 parts of water retaining agent, 1.00 part of preservative and 14.00 parts of mud blocking agent into a stirring container, then adding water to 500 parts, and stirring and mixing uniformly to obtain the admixture.
Example 6: the invention discloses a machine-made sand wet-mixed mortar admixture, which is different from the embodiment 1 in that the preparation method of the admixture comprises the following steps,
s1, selecting a styrene-cyclodextrin polycarboxylic acid water reducing agent as a polycarboxylic acid water reducing agent, selecting an ether polycarboxylic acid slump retaining agent as a polycarboxylic acid slump retaining agent, selecting white sugar as an organic retarder, and selecting a polyether modified organic silicon defoaming agent as an organic silicon defoaming agent;
s2, adding 20.00 parts of hydrogenated rosin into 20.00 parts of water, adding 12.00 parts of sodium dodecyl benzene sulfonate and 8.50 parts of sorbitol polyoxyethylene ether tetraoleate into the mixture at 80-120 ℃, adding 100 parts of water, and uniformly stirring to obtain the air entraining agent
S3 adding 36.00 parts of sodium polyacrylate grafted starch, 11.00 parts of activated clay, 8.00 parts of glyceryl monostearate, 15.00 parts of calcium sulfoaluminate and 6.00 parts of alkyl glycoside into a stirring container, and uniformly stirring to obtain the water-retaining agent.
S4 putting 58.00 parts of nano zinc powder, 9.00 parts of bis-imidazoline quaternary ammonium salt, 10.00 parts of didecyl dimethyl ammonium carbonate, 3.00 parts of sodium molybdate and 18.00 parts of nano zinc oxide emulsion into a stirring container, and uniformly stirring to obtain the preservative.
S5 the method comprises the steps of firstly putting 4.00 parts of epichlorohydrin-dimethylamine copolymer, 5.50 parts of potassium nitrate and 27.00 parts of ethylene diamine tetramethylene phosphonic acid sodium into a stirring container, then adding water to 100 parts, and uniformly stirring to obtain the mud retarder.
S6 adding 65.00 parts of polycarboxylic acid water reducing agent, 38.00 parts of polycarboxylic acid slump retaining agent, 3.50 parts of organic retarder, 2.00 parts of air entraining agent, 0.04 part of organic silicon defoaming agent, 8.00 parts of water retaining agent, 2.00 parts of preservative and 10.50 parts of mud blocking agent into a stirring container, adding water to 500 parts, and stirring and uniformly mixing to obtain the admixture.
Example 7: the invention discloses a machine-made sand wet-mixed mortar admixture, which is different from the embodiment 1 in that the preparation method of the admixture comprises the following steps,
s1, selecting a polycarboxylic acid water reducing agent synthesized by prenyl polyoxyethylene ether macromonomer as a polycarboxylic acid water reducing agent, selecting an ether polycarboxylic acid slump retaining agent as a polycarboxylic acid slump retaining agent, selecting sodium gluconate as an organic retarder, and selecting a polyether modified organic silicon defoaming agent as an organic silicon defoaming agent;
s2, adding 23.00 parts of hydrogenated rosin into 20.00 parts of water, adding 13.00 parts of sodium dodecyl benzene sulfonate and 10.00 parts of sorbitol polyoxyethylene ether tetraoleate at 80-120 ℃, adding 100 parts of water, and stirring uniformly to obtain the air entraining agent
S3 putting 48.00 parts of sodium polyacrylate grafted starch, 13.00 parts of activated clay, 14.00 parts of glyceryl monostearate, 4.00 parts of calcium sulfoaluminate and 4.00 parts of alkyl glycoside into a stirring container, and uniformly stirring to obtain the water-retaining agent.
S4 putting 54.00 parts of nano zinc powder, 10.00 parts of bis-imidazoline quaternary ammonium salt, 9.00 parts of didecyl dimethyl ammonium carbonate, 2.00 parts of sodium molybdate and 26.00 parts of nano zinc oxide emulsion into a stirring container, and uniformly stirring to obtain the preservative.
S5 the method comprises the steps of firstly putting 6.00 parts of epichlorohydrin-dimethylamine copolymer, 4.00 parts of potassium nitrate and 23.00 parts of ethylene diamine tetramethylene phosphonic acid sodium into a stirring container, then adding water to 100 parts, and uniformly stirring to obtain the mud retarder.
S6 adding 70.00 parts of polycarboxylic acid water reducing agent, 27.00 parts of polycarboxylic acid slump retaining agent, 2.50 parts of organic retarder, 1.50 parts of air entraining agent, 0.06 part of organic silicon defoaming agent, 6.00 parts of water retaining agent, 1.50 parts of preservative and 14.50 parts of mud blocking agent into a stirring container, adding water to 500 parts, and stirring and uniformly mixing to obtain the admixture.
Example 8: the invention discloses a machine-made sand wet-mixed mortar admixture, which is different from the embodiment 1 in that the preparation method of the admixture comprises the following steps,
s1, selecting a polycarboxylate superplasticizer synthesized from methyl allyl polyoxyethylene ether as a polycarboxylate superplasticizer, selecting an ether polycarboxylate slump retaining agent as a polycarboxylate slump retaining agent, selecting sodium citrate as an organic retarder, and selecting a polyether modified organic silicon defoaming agent as an organic silicon defoaming agent;
s2, adding 24.00 parts of hydrogenated rosin into 20.00 parts of water, adding 14.00 parts of sodium dodecyl benzene sulfonate and 8.00 parts of sorbitol polyoxyethylene ether tetraoleate at 80-120 ℃, adding 100 parts of water, and stirring uniformly to obtain the air entraining agent
S3 adding 35.00 parts of sodium polyacrylate grafted starch, 15.00 parts of activated clay, 12.00 parts of glyceryl monostearate, 11.00 parts of calcium sulfoaluminate and 7.00 parts of alkyl glycoside into a stirring container, and uniformly stirring to obtain the water-retaining agent.
S4 putting 59.00 parts of nano zinc powder, 8.00 parts of bis-imidazoline quaternary ammonium salt, 8.00 parts of didecyl dimethyl ammonium carbonate, 5.00 parts of sodium molybdate and 34.00 parts of nano zinc oxide emulsion into a stirring container, and uniformly stirring to obtain the preservative.
S5 adding 4.00 parts of epichlorohydrin-dimethylamine copolymer, 5.00 parts of potassium nitrate and 28.00 parts of ethylenediamine tetramethylene sodium phosphonate into a stirring container, adding 100 parts of water, and uniformly stirring to obtain the mud retarder.
S6 adding 65.00 parts of polycarboxylic acid water reducing agent, 22.00 parts of polycarboxylic acid slump retaining agent, 4.50 parts of organic retarder, 1.30 parts of air entraining agent, 0.05 part of organic silicon defoaming agent, 4.00 parts of water retaining agent, 1.30 parts of preservative and 12.50 parts of mud blocking agent into a stirring container, adding water to 500 parts, and stirring and uniformly mixing to obtain the admixture.
Example 9: the invention discloses a machine-made sand wet-mixed mortar admixture, which is different from the embodiment 1 in that the preparation method of the admixture comprises the following steps,
s1, selecting a styrene-cyclodextrin polycarboxylic acid water reducing agent as a polycarboxylic acid water reducing agent, selecting an ether polycarboxylic acid slump retaining agent as a polycarboxylic acid slump retaining agent, selecting white sugar as an organic retarder, and selecting a polyether modified organic silicon defoaming agent as an organic silicon defoaming agent;
s2, adding 22.00 parts of hydrogenated rosin into 20.00 parts of water, adding 15.00 parts of sodium dodecyl benzene sulfonate and 9.00 parts of sorbitol polyoxyethylene ether tetraoleate at 80-120 ℃, adding 100 parts of water, and stirring uniformly to obtain the air entraining agent
S3 putting 49.00 parts of sodium polyacrylate grafted starch, 15.00 parts of activated clay, 6.00 parts of glyceryl monostearate, 10.00 parts of calcium sulfoaluminate and 9.00 parts of alkyl glycoside into a stirring container, and uniformly stirring to obtain the water-retaining agent.
S4 putting 57.00 parts of nano zinc powder, 8.50 parts of bis-imidazoline quaternary ammonium salt, 6.00 parts of didecyl dimethyl ammonium carbonate, 2.00 parts of sodium molybdate and 30.00 parts of nano zinc oxide emulsion into a stirring container, and uniformly stirring to obtain the preservative.
S5 the method comprises the steps of firstly putting 6.00 parts of epichlorohydrin-dimethylamine copolymer, 4.50 parts of potassium nitrate and 25.00 parts of ethylene diamine tetramethylene phosphonic acid sodium into a stirring container, then adding water to 100 parts, and uniformly stirring to obtain the mud retarder.
S6 adding 55.00 parts of polycarboxylic acid water reducing agent, 30.00 parts of polycarboxylic acid slump retaining agent, 5.50 parts of organic retarder, 1.80 parts of air entraining agent, 0.04 part of organic silicon defoaming agent, 2.00 parts of water retaining agent, 1.80 parts of preservative and 13.50 parts of mud blocking agent into a stirring container, adding water to 500 parts, and stirring and uniformly mixing to obtain the admixture.
Performance test
The performance of the machine-made sand wet-mixed mortar admixture of the examples 1-9 is detected according to the national standard GBT25181-2010 premixed mortar and the industry standard JGJ/T70-2009 building mortar basic performance test method standard, and the commercial mortar admixture (containing thickening agents such as carboxymethyl cellulose and the like and a retarder) is used as a proportion.
Table 1: mixing proportion of machine-made sand wet-mixed mortar
| Component (in parts) | Cement | Slag powder | Fly ash | Machine-made sand | Large crushed stone | Small crushed stone | Additive agent | Water (W) |
| C40 mortar | 671 | 503 | 503 | 3444 | 2945 | 1262 | 18 | 654 |
| C50 mortar | 1086 | 363 | 363 | 3240 | 3005 | 1288 | 20 | 635 |
| C60 mortar | 973 | 391 | 586 | 3109 | 3006 | 1288 | 23 | 624 |
Wherein, the cementing material: the cement is P.II 52.5 Portland cement; the fly ash is F class I fly ash; the slag powder is S95 grade slag powder, the density is more than or equal to 2.8g/cm, the specific surface area is more than or equal to 400 square meters per kg, the fluidity ratio is more than or equal to 95 percent, the loss on ignition is less than or equal to 1.0 percent, the activity index in 7 days is more than or equal to 70 percent, and the activity index in 28 days is more than or equal to 95 percent; the weight ratio of water to cementitious material is about 0.39: 1;
fine aggregate: the machine-made sand is type II sand in the 2 areas, and the weight ratio of the cement to the machine-made sand is about 0.19: 1;
coarse aggregate: the macadam consists of 70 percent of 10-25 mm large macadam and 30 percent of 5-10 mm small macadam, the mud content of the macadam is less than or equal to 0.5 percent, the mud block content is 0, the needle sheet content is less than or equal to 5 percent, the crushing value is less than or equal to 10 percent, and the apparent density is more than or equal to 2600kg/m 3 The void ratio is less than or equal to 43 percent, and the water absorption is less than or equal to 1.0 percent.
Table 2: examples 1 to 9 pairs of machine-made sandsInfluence of the working Properties of the Wet-mix mortar
| Wet-mixed mortar of machine-made sand | Apparent density/kg m high yield | Initial consistency/mm | Water retention rate/%) | 2h degree of delamination/mm | Ease status | 12h consistency loss% | Strength grade | |
| Example 1 | C40 mortar | 1890 | 89 | 89 | 6 | No bleeding and good condition | 6.5 | C40 |
| Example 2 | C40 mortar | 1880 | 93 | 92 | 5 | No bleeding and good condition | 5.6 | C40 |
| Example 3 | C40 mortar | 1870 | 91 | 93 | 7 | No bleeding and good condition | 7.2 | C40 |
| Comparative example | C40 mortar | 1830 | 85 | 88 | 15 | No bleeding and high viscosity | 35.6 | C40 |
| Example 4 | C50 mortar | 1920 | 87 | 91 | 8 | No bleeding and good condition | 4.3 | C50 |
| Example 5 | C50 mortar | 1910 | 80 | 92 | 9 | No bleeding and good condition | 7.2 | C50 |
| Example 6 | C50 mortar | 1880 | 92 | 95 | 7 | No bleeding and good condition | 6.3 | C50 |
| Comparative example | C50 mortar | 1840 | 88 | 85 | 16 | Slightly bleeding and high viscosity | 40.1 | C50 |
| Example 7 | C60 mortar | 1870 | 94 | 98 | 8 | No bleeding and good condition | 8.1 | C60 |
| Example 8 | C60 mortar | 1900 | 88 | 93 | 7 | No bleeding and good condition | 6.7 | C60 |
| Example 9 | C60 mortar | 1850 | 89 | 94 | 6 | Slight bleeding and rough hand feeling | 7.9 | C60 |
| Comparative example | C60 mortar | 1850 | 85.00 | 82 | 17 | No bleeding and good condition | 38.2 | C60 |
As can be seen from table 2, firstly, no thickening component which is not stable to water is added, and the thickening effect is achieved by adding the polycarboxylic acid water reducing agent and the mud inhibitor, the mud inhibitor can adsorb the surface of the machine-made sand, neutralize the charge of the machine-made sand, and reduce the adsorption force of the machine-made sand on the polycarboxylic acid water reducing agent, so that the compounded admixture is stable and is not easy to layer; secondly, the opening time of the wet-mixed mortar is prolonged by combining the organic retarder with the polycarboxylic acid slump retaining agent and the water-retaining agent, so that the working performance of the wet-mixed mortar is ensured, the water locking and retaining performances of the wet-mixed mortar at the early stage and the later stage are improved, and the bleeding layer of the wet-mixed mortar is further avoided; thirdly, foam or large bubbles generated by preparing the admixture are taken out or inhibited through the organic silicon defoaming agent, and then small bubbles are introduced through the air entraining agent, so that the admixture has good workability, and simultaneously, the bubbles in the wet-mixed mortar can be stabilized, and the wet-mixed mortar is ensured to be used at any time and be in a constant state after being transported to a construction site; finally, the preservative is introduced, so that a wet-mixed mortar system can be stable for a long time, and the corrosion problem caused by scraping of a steel reinforcement framework by a machine-made sand corner can be relieved; in conclusion, the additive disclosed by the invention achieves the purposes of improving the stability of the wet-mixed mortar and avoiding the bleeding stratification of the wet-mixed mortar by improving the water locking, water retaining and slump retaining performances of the wet-mixed mortar and inhibiting the influence of machine-made sand on the working performance of the additive without influencing the working performance of the wet-mixed mortar.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (10)
1. The machine-made sand wet-mixed mortar additive is characterized in that: the additive is prepared from the following raw materials in parts by weight,
40.00-70.00 parts of a polycarboxylic acid water reducing agent;
20.00-40.00 parts of polycarboxylic slump retaining agent;
2.00-6.00 parts of an organic retarder;
0.02-0.20 part of air entraining agent;
0.02-0.07 part of organic silicon defoaming agent;
1.00-10.00 parts of a water-retaining agent;
0.02-0.20 part of preservative;
10.00-15.00 parts of a mud inhibitor;
water is added to 500 parts.
2. The machine-made sand wet-mixed mortar admixture according to claim 1, wherein: the polycarboxylate water reducer is a polycarboxylate water reducer synthesized from a prenyl polyoxyethylene ether macromonomer, a polycarboxylate water reducer synthesized from methyl allyl polyoxyethylene ether, or a styrene-cyclodextrin polycarboxylate water reducer.
3. The machine-made sand wet-mixed mortar admixture according to claim 1, wherein: the polycarboxylic acid slump retaining agent is an ether polycarboxylic acid slump retaining agent.
4. The machine-made sand wet-mixed mortar admixture according to claim 1, wherein: the organic retarder is sodium gluconate, sodium citrate or white sugar.
5. The machine-made sand wet-mixed mortar admixture according to claim 1, wherein: the air entraining agent is prepared from the following raw materials in parts by weight, 10.00-20.00 parts of sodium dodecyl benzene sulfonate; 20.00-30.00 parts of hydrogenated rosin; 8.00-10.00 parts of sorbitol polyoxyethylene ether tetraoleate; water is added to 100 parts.
6. The machine-made sand wet-mixed mortar admixture according to claim 1, wherein: the organic silicon defoaming agent is polyether modified organic silicon defoaming agent.
7. The machine-made sand wet-mixed mortar admixture according to claim 1, wherein: the water-retaining agent is prepared from the following raw materials in parts by weight, wherein 30.00-50.00 parts of sodium polyacrylate grafted starch are used; 10.00-18.00 parts of activated clay; 5.00-15.00 parts of glycerin monostearate; 3.00-15.00 parts of calcium sulphoaluminate; 2.00-10.00 alkyl glycoside.
8. The machine-made sand wet-mixed mortar admixture according to claim 1, wherein: the preservative is prepared from the following raw materials in parts by weight, and 50.00-60.00 parts of metal nano powder; 8.00-10.00 parts of bisimidazoline quaternary ammonium salt; 5.00-10.00 parts of didecyl dimethyl ammonium carbonate; 2.00-5.00 parts of sodium molybdate; 15.00-35.00 parts of metal oxide nano emulsion.
9. The machine-made sand wet-mixed mortar admixture according to claim 8, which is characterized in that: the metal nano powder is nano zinc powder, and the metal oxide nano emulsion is nano zinc oxide emulsion.
10. The machine-made sand wet-mixed mortar admixture according to claim 1, wherein: the mud inhibitor is prepared from the following raw materials in parts by weight, and the epichlorohydrin-dimethylamine copolymer is 4.00-6.00 parts; 4.00-6.00 parts of inorganic potassium salt; 20.00-30.00 parts of ethylenediamine tetramethylene phosphonate; water is added to 100 parts.
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Citations (2)
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| CN108069663A (en) * | 2017-12-29 | 2018-05-25 | 中建西部建设贵州有限公司 | A kind of high pier stud machine-made sand concrete of morning strong retardation setting type and preparation method thereof |
| CN111978005A (en) * | 2020-08-24 | 2020-11-24 | 陕西瑞星建材科技有限公司 | Composite water reducing agent and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108069663A (en) * | 2017-12-29 | 2018-05-25 | 中建西部建设贵州有限公司 | A kind of high pier stud machine-made sand concrete of morning strong retardation setting type and preparation method thereof |
| CN111978005A (en) * | 2020-08-24 | 2020-11-24 | 陕西瑞星建材科技有限公司 | Composite water reducing agent and preparation method and application thereof |
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