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CN116375929A - Workability regulator for machine-made sand concrete mixture and preparation method thereof - Google Patents

Workability regulator for machine-made sand concrete mixture and preparation method thereof Download PDF

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CN116375929A
CN116375929A CN202310195191.0A CN202310195191A CN116375929A CN 116375929 A CN116375929 A CN 116375929A CN 202310195191 A CN202310195191 A CN 202310195191A CN 116375929 A CN116375929 A CN 116375929A
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machine
made sand
concrete
acid
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赵利华
张伟
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GUANGDONG REDWALL NEW MATERIALS CO Ltd
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10Esters
    • C08F220/26Esters containing oxygen in addition to the carboxy oxygen
    • C08F220/28Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety
    • C08F220/282Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety and containing two or more oxygen atoms
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/16Sulfur-containing compounds
    • C04B24/161Macromolecular compounds comprising sulfonate or sulfate groups
    • C04B24/163Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F222/00Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
    • C08F222/10Esters
    • C08F222/1006Esters of polyhydric alcohols or polyhydric phenols
    • C08F222/102Esters of polyhydric alcohols or polyhydric phenols of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

本发明涉及混凝土外加剂技术领域,公开了一种机制砂混凝土拌合物和易性调节剂,包括双酚酸、醇胺、2‑甲基‑2‑丙烯‑1‑醇、三氟甲磺酸、不饱和羧酸酯、2‑丙烯酰胺基‑2‑甲基丙磺酸、亚硫酸氢氨、过硫酸铵和去离子水;本发明提供的机制砂混凝土拌合物和易性调节剂,其水溶性好,与聚羧酸减水剂相容性好,掺入机制砂混凝土中后,混凝土拌合物具有较好的黏聚性、保水性,机制砂和碎石挂浆效果好,明显改善混凝土拌合物的和易性,减少了泌水以及降低混凝土坍落度经时损失,并且其对混凝土不同机制砂材料,特别是含泥含粉机制砂具有良好的经时保坍适应性;此外,本发明机制砂混凝土调节剂绿色环保,生产成本低,便于推广及应用。The invention relates to the technical field of concrete admixtures, and discloses a machine-made sand concrete mixture and workability regulator, which includes bisphenolic acid, alcohol amine, 2-methyl-2-propene-1-alcohol, and trifluoromethanesulfonate acid, unsaturated carboxylic acid ester, 2-acrylamido-2-methylpropanesulfonic acid, ammonium bisulfite, ammonium persulfate and deionized water; machine-made sand concrete mixture and workability regulator provided by the invention , It has good water solubility and good compatibility with polycarboxylate superplasticizer. After being mixed into machine-made sand concrete, the concrete mixture has good cohesiveness and water retention, and the machine-made sand and crushed stone have a good grouting effect. , significantly improve the workability of concrete mixtures, reduce bleeding and reduce the loss of concrete slump over time, and it has good slump protection over time for different machine-made sand materials for concrete, especially machine-made sand containing mud and silt Adaptability; in addition, the machine-made sand concrete conditioner of the present invention is green and environmentally friendly, has low production cost, and is convenient for popularization and application.

Description

一种机制砂混凝土拌合物和易性调节剂及其制备方法A machine-made sand concrete mixture workability regulator and preparation method thereof

技术领域technical field

本发明涉及混凝土外加剂技术领域,具体是一种机制砂混凝土拌合物和易性调节剂及其制备方法。The invention relates to the technical field of concrete admixtures, in particular to a machine-made sand concrete mixture workability regulator and a preparation method thereof.

背景技术Background technique

砂石是工程建设中特别是水泥混凝土最基本且不可或缺的建筑材料。长期以来,我国用砂主要采用天然河砂,但经过20多年大规模开采,天然砂资源逐渐减少,随着环保政策的监管加强,天然河砂不能满足建筑市场需求,越来越多地区开始采用机制砂。机制砂是天然河砂理想的替代品,采用先进工艺和设备生产出来的机制砂完全可以替代天然河砂用于混凝土生产。但由于机制砂应用进程过快,部分地区对机制砂的认识和监管不足,成本、设备和工艺因素导致生产出来机制砂质量层次不齐,品质千差万别。主要表现在颗粒无整形工艺,粒型差;选粉工艺比较粗糙,石粉含量波动大(5%~15%);母岩来源不稳定,未经清洗去杂,含泥量高;设备工艺不规范,级配不良;Sand and gravel are the most basic and indispensable building materials in engineering construction, especially cement concrete. For a long time, my country has mainly used natural river sand for sand, but after more than 20 years of large-scale mining, natural sand resources have gradually decreased. With the strengthening of environmental protection policy supervision, natural river sand cannot meet the needs of the construction market, and more and more regions have begun to use it. Machine-made sand. Machine-made sand is an ideal substitute for natural river sand. The machine-made sand produced by advanced technology and equipment can completely replace natural river sand for concrete production. However, due to the rapid application process of machine-made sand, the understanding and supervision of machine-made sand in some areas are insufficient, and the factors of cost, equipment and technology lead to uneven quality of produced machine-made sand, and the quality varies greatly. The main performance is that there is no shaping process for the particles, and the grain shape is poor; the powder selection process is relatively rough, and the content of stone powder fluctuates greatly (5% to 15%); the source of the parent rock is unstable, without cleaning and removing impurities, and the mud content is high; specification, poor gradation;

机制砂的质量问题导致采用机制砂拌制的混凝土经常出现包裹性差、流动性差、坍落度损失大、混凝土拌合物易离析泌水等和易性问题,同时存在对用水量敏感,坍落度波动大,流动度不易控制等问题,影响了机制砂在混凝土中的推广应用,造成严重的工程质量隐患,甚至出现工程质量事故;The quality problems of machine-made sand lead to workability problems such as poor encapsulation, poor fluidity, large slump loss, easy segregation and bleeding of concrete mixture in concrete mixed with machine-made sand. At the same time, it is sensitive to water consumption, slump Problems such as large degree fluctuations and difficult control of fluidity have affected the popularization and application of machine-made sand in concrete, causing serious hidden dangers in engineering quality, and even engineering quality accidents;

解决机制砂混凝土和易性问题,通常采用减水剂母液及其他辅助材料复配的调整方法,例如:需要采用高减水性的功能性减水剂母液,加保水增稠剂羟丙基甲基纤维素醚HPMC以及引气剂等,但是该类型减水剂的成品,往往存在HPMC价格高并且难溶解于水、容易结团,造成聚羧酸外加剂复配成品的匀质性不良,进而也影响聚羧酸外加剂产品性能的发挥;To solve the workability problem of machine-made sand concrete, the adjustment method of compounding water-reducing agent mother liquor and other auxiliary materials is usually adopted. For example, it is necessary to use a functional water-reducing agent mother liquor with high water-reducing performance, and add water-retaining thickener hydroxypropyl methyl Cellulose ether HPMC and air-entraining agent, etc., but the finished product of this type of water reducer often has high HPMC price, is difficult to dissolve in water, and is easy to agglomerate, resulting in poor homogeneity of the polycarboxylic acid admixture compound product, and then It also affects the performance of polycarboxylic acid admixture products;

目前市面上大部分机制砂混凝土和易性调节剂,其配方组成主要含有三乙醇胺、三异丙醇胺及部分无机盐、少量引气剂和水简单复配而成,在混凝土中的掺量在2kg/m3左右,加入机制砂调节剂后,新拌混凝土扩展度会明显降低,混凝土拌合物坍落扩展度的经时损失较为显著,该产品推广应用具有一定的局限性;At present, most of the machine-made sand concrete and workability regulators on the market are mainly composed of triethanolamine, triisopropanolamine and some inorganic salts, a small amount of air-entraining agent and water. The dosage in concrete At about 2kg/m 3 , after adding the machine-made sand conditioner, the expansion degree of fresh concrete will be significantly reduced, and the time-lapse loss of the slump expansion degree of the concrete mixture is more significant, and the popularization and application of this product has certain limitations;

机制砂混凝土和易性问题涉及到混凝土保水性、粘聚性、包裹性、气泡结构及稳定性等多方面内容,单纯依靠减水剂的复配和配合比的设计调整难以彻底解决问题,需要开发出一种专用于机制砂混凝土的和易性调整的调节剂。因此,本领域技术人员提供了一种机制砂混凝土拌合物和易性调节剂及其制备方法,以解决上述背景技术中提出的问题。The workability of machine-made sand concrete involves many aspects such as concrete water retention, cohesion, encapsulation, bubble structure and stability. It is difficult to completely solve the problem by simply relying on the compounding of water reducing agent and the design adjustment of the mix ratio. A regulator specially used for workability adjustment of machine-made sand concrete has been developed. Therefore, those skilled in the art provide a machine-made sand concrete mixture workability regulator and a preparation method thereof to solve the problems raised in the above-mentioned background technology.

发明内容Contents of the invention

本发明的目的在于提供一种机制砂混凝土拌合物和易性调节剂及其制备方法,以解决上述背景技术中提出的问题。The object of the present invention is to provide a machine-made sand concrete mixture workability regulator and a preparation method thereof, so as to solve the problems raised in the above-mentioned background technology.

为实现上述目的,本发明提供如下技术方案:To achieve the above object, the present invention provides the following technical solutions:

一种机制砂混凝土拌合物和易性调节剂,包括双酚酸、醇胺、2-甲基-2-丙烯-1-醇、三氟甲磺酸、不饱和羧酸酯、2-丙烯酰胺基-2-甲基丙磺酸、亚硫酸氢氨、过硫酸铵和去离子水,所述双酚酸、醇胺、2-甲基-2-丙烯-1-醇、三氟甲磺酸、不饱和羧酸酯、2-丙烯酰胺基-2-甲基丙磺酸、亚硫酸氢氨、过硫酸铵和去离子水的重量份组成如下:286~372份双酚酸、88~177份醇胺、72~144份2-甲基-2-丙烯-1-醇、10~30份三氟甲磺酸、320~640份不饱和羧酸酯、100~150份2-丙烯酰胺基-2-甲基丙磺酸、5~10份亚硫酸氢氨、5~10份过硫酸铵和1000~2000份去离子水。A machine-made sand concrete mixture workability regulator, including bisphenolic acid, alcohol amine, 2-methyl-2-propen-1-ol, trifluoromethanesulfonic acid, unsaturated carboxylic acid ester, 2-propene Amino-2-methylpropanesulfonic acid, ammonium bisulfite, ammonium persulfate and deionized water, the bisphenolic acid, alcohol amine, 2-methyl-2-propen-1-ol, trifluoromethanesulfonate Acid, unsaturated carboxylic acid ester, 2-acrylamido-2-methylpropanesulfonic acid, ammonium bisulfite, ammonium persulfate and deionized water are composed as follows: 286~372 parts of bisphenolic acid, 88~ 177 parts of alcohol amine, 72-144 parts of 2-methyl-2-propen-1-ol, 10-30 parts of trifluoromethanesulfonic acid, 320-640 parts of unsaturated carboxylic acid ester, 100-150 parts of 2-acrylamide Base-2-methylpropanesulfonic acid, 5-10 parts of ammonium bisulfite, 5-10 parts of ammonium persulfate and 1000-2000 parts of deionized water.

作为本发明再进一步的方案:所述醇胺为三乙醇胺、一乙醇二异丙醇胺和二乙醇单异丙醇胺中的一种。As a further solution of the present invention: the alcohol amine is one of triethanolamine, monoethanol diisopropanolamine and diethanol monoisopropanolamine.

作为本发明再进一步的方案:所述不饱和羧酸酯为二乙二醇单丙烯酸酯和二丙烯酸乙二醇酯中的一种。As a further solution of the present invention: the unsaturated carboxylic acid ester is one of diethylene glycol monoacrylate and ethylene glycol diacrylate.

一种机制砂混凝土拌合物和易性调节剂的制备方法,包括以下步骤:A preparation method of machine-made sand concrete mixture and workability regulator, comprising the following steps:

S1、向反应器中加入286~372份双酚酸、88~177份一乙醇二异丙醇胺、72~144份2-甲基-2-丙烯-1-醇和10~30份三氟甲磺酸,对其进行混合均匀,混合均匀后以一定的温度进行反应,反应一段时间,一段时间后降至室温并加入200~300份的去离子水,得到液体A;S1. Add 286-372 parts of bisphenolic acid, 88-177 parts of monoethanol diisopropanolamine, 72-144 parts of 2-methyl-2-propen-1-ol and 10-30 parts of trifluoroform into the reactor Sulfonic acid, mix it evenly, react at a certain temperature after mixing evenly, react for a period of time, after a period of time, drop to room temperature and add 200-300 parts of deionized water to obtain liquid A;

S2、取320~640份不饱和羧酸酯、100~150份2-丙烯酰胺基-2-甲基丙磺酸和5~10份亚硫酸氢氨,用400~600份的去离子水溶解,得到液体B;S2. Take 320-640 parts of unsaturated carboxylic acid ester, 100-150 parts of 2-acrylamido-2-methylpropanesulfonic acid and 5-10 parts of ammonium bisulfite, and dissolve them in 400-600 parts of deionized water , to obtain liquid B;

S3、取5~10份过硫酸铵溶解在50份去离子水中,得到液体C;S3. Dissolving 5-10 parts of ammonium persulfate in 50 parts of deionized water to obtain liquid C;

S4、将剩余去离子水放入反应器中,升温至一定温度,然后开启搅拌,接着分别滴加液体A、液体B、液体C,持续滴加一定时间并将其滴加完毕,保温一段时间,随后降至室温,即可得到机制砂混凝土拌合物和易性调节剂。S4. Put the remaining deionized water into the reactor, heat up to a certain temperature, then start stirring, then add liquid A, liquid B, and liquid C dropwise, continue dropping for a certain period of time and complete the dropwise addition, and keep warm for a period of time , and then lowered to room temperature, the machine-made sand concrete mixture and workability regulator can be obtained.

作为本发明再进一步的方案:所述S1中混合均匀后的反应温度为120~180℃,反应时间为3~6h。As a further solution of the present invention: the reaction temperature after uniform mixing in S1 is 120-180° C., and the reaction time is 3-6 hours.

作为本发明再进一步的方案:所述S4中的一定温度为60~90℃。As a further solution of the present invention: the certain temperature in S4 is 60-90°C.

作为本发明再进一步的方案:所述S4中的持续滴加时间为2~3h。As a further solution of the present invention: the continuous dropping time in S4 is 2-3 hours.

作为本发明再进一步的方案:所述S4中的保温时间为0.5~1h。As a further solution of the present invention: the holding time in S4 is 0.5-1 h.

与现有技术相比,本发明的有益效果是:Compared with prior art, the beneficial effect of the present invention is:

1、本发明提供的机制砂混凝土拌合物和易性调节剂与目前广泛应用的聚羧酸减水剂具有相同的官能团,其水溶性好,不容易结团,与聚羧酸减水剂相容性好;掺入机制砂混凝土中后,混凝土拌合物具有较好的黏聚性、保水性,机制砂和碎石挂浆效果好,明显改善混凝土拌合物的和易性,减少了泌水以及降低混凝土坍落度经时损失。1. The machine-made sand concrete mixture and workability regulator provided by the present invention has the same functional group as the polycarboxylate superplasticizer widely used at present. It has good water solubility and is not easy to agglomerate. Good compatibility; after being mixed into machine-made sand concrete, the concrete mixture has good cohesion and water retention, and the machine-made sand and crushed stone have a good grouting effect, which significantly improves the workability of the concrete mixture and reduces Prevent bleeding and reduce the loss of concrete slump over time.

2、本发明提供的机制砂混凝土拌合物和易性调节剂,对混凝土不同机制砂材料,特别是含泥含粉机制砂具有良好的经时保坍适应性;此外,本发明机制砂混凝土调节剂配料绿色环保,生产成本低,便于推广及应用。2. The machine-made sand concrete mixture and workability regulator provided by the present invention has good adaptability to slump protection over time for different machine-made sand materials of concrete, especially machine-made sand containing mud and powder; in addition, the machine-made sand concrete of the present invention The ingredients of the regulator are green and environment-friendly, the production cost is low, and it is convenient for popularization and application.

具体实施方式Detailed ways

实施例1Example 1

一种机制砂混凝土拌合物和易性调节剂,包括双酚酸、三乙醇胺、2-甲基-2-丙烯-1-醇、三氟甲磺酸、二乙二醇单丙烯酸酯、2-丙烯酰胺基-2-甲基丙磺酸、亚硫酸氢氨、过硫酸铵和去离子水,双酚酸、三乙醇胺、2-甲基-2-丙烯-1-醇、三氟甲磺酸、二乙二醇单丙烯酸酯、2-丙烯酰胺基-2-甲基丙磺酸、亚硫酸氢氨、过硫酸铵和去离子水的重量份组成如下:286份双酚酸、177份三乙醇胺、72份2-甲基-2-丙烯-1-醇、30份三氟甲磺酸、320份二乙二醇单丙烯酸酯、150份2-丙烯酰胺基-2-甲基丙磺酸、5份亚硫酸氢氨、10份过硫酸铵和1000份去离子水。A machine-made sand concrete mixture workability regulator, including bisphenolic acid, triethanolamine, 2-methyl-2-propen-1-ol, trifluoromethanesulfonic acid, diethylene glycol monoacrylate, 2 - Acrylamido-2-methylpropanesulfonic acid, ammonium bisulfite, ammonium persulfate and deionized water, bisphenolic acid, triethanolamine, 2-methyl-2-propen-1-ol, trifluoromethanesulfonate Acid, diethylene glycol monoacrylate, 2-acrylamido-2-methylpropanesulfonic acid, ammonium bisulfite, ammonium persulfate and deionized water are composed as follows: 286 parts of bisphenolic acid, 177 parts Triethanolamine, 72 parts of 2-methyl-2-propen-1-ol, 30 parts of trifluoromethanesulfonic acid, 320 parts of diethylene glycol monoacrylate, 150 parts of 2-acrylamido-2-methylpropanesulfonate acid, 5 parts ammonium bisulfite, 10 parts ammonium persulfate, and 1000 parts deionized water.

一种机制砂混凝土拌合物和易性调节剂的制备方法,包括以下步骤:A preparation method of machine-made sand concrete mixture and workability regulator, comprising the following steps:

S1、向反应器中加入286份双酚酸、177份三乙醇胺、72份2-甲基-2-丙烯-1-醇和30份三氟甲磺酸,对其进行混合均匀,混合均匀后以120℃温度进行反应,反应6h后,降至室温并加入200份的去离子水,得到液体A;S1. Add 286 parts of bisphenolic acid, 177 parts of triethanolamine, 72 parts of 2-methyl-2-propen-1-alcohol and 30 parts of trifluoromethanesulfonic acid into the reactor, mix it evenly, and use React at a temperature of 120°C. After 6 hours of reaction, cool down to room temperature and add 200 parts of deionized water to obtain liquid A;

S2、取320份二乙二醇单丙烯酸酯、150份2-丙烯酰胺基-2-甲基丙磺酸和5~10份亚硫酸氢氨,用600份的去离子水溶解,得到液体B;S2. Take 320 parts of diethylene glycol monoacrylate, 150 parts of 2-acrylamido-2-methylpropanesulfonic acid and 5-10 parts of ammonium bisulfite, and dissolve them with 600 parts of deionized water to obtain liquid B ;

S3、取10份过硫酸铵溶解在50份去离子水中,得到液体C;S3. Dissolve 10 parts of ammonium persulfate in 50 parts of deionized water to obtain liquid C;

S4、将剩余去离子水放入反应器中,升温至60℃,然后开启搅拌,接着分别滴加液体A、液体B、液体C,持续滴加3h并滴加完毕,保温0.5h,随后降至室温,即可得到机制砂混凝土拌合物和易性调节剂。S4. Put the remaining deionized water into the reactor, raise the temperature to 60°C, then start stirring, then add liquid A, liquid B, and liquid C dropwise respectively, continue to add dropwise for 3 hours and complete the dropwise addition, keep warm for 0.5h, and then drop to room temperature, the machine-made sand concrete mixture and workability regulator can be obtained.

实施例2Example 2

一种机制砂混凝土拌合物和易性调节剂,包括双酚酸、一乙醇二异丙醇胺、2-甲基-2-丙烯-1-醇、三氟甲磺酸、二丙烯酸乙二醇酯、2-丙烯酰胺基-2-甲基丙磺酸、亚硫酸氢氨、过硫酸铵和去离子水,双酚酸、一乙醇二异丙醇胺、2-甲基-2-丙烯-1-醇、三氟甲磺酸、二丙烯酸乙二醇酯、2-丙烯酰胺基-2-甲基丙磺酸、亚硫酸氢氨、过硫酸铵和去离子水的重量份组成如下:372份双酚酸、88份一乙醇二异丙醇胺、144份2-甲基-2-丙烯-1-醇、10份三氟甲磺酸、640份二丙烯酸乙二醇酯、100份2-丙烯酰胺基-2-甲基丙磺酸、10份亚硫酸氢氨、5份过硫酸铵和2000份去离子水。A machine-made sand concrete mixture and workability regulator, including bisphenolic acid, monoethanol diisopropanolamine, 2-methyl-2-propen-1-ol, trifluoromethanesulfonic acid, ethylene diacrylate Alcohol esters, 2-acrylamido-2-methylpropanesulfonic acid, ammonium bisulfite, ammonium persulfate and deionized water, bisphenolic acid, monoethanol diisopropanolamine, 2-methyl-2-propene The composition by weight of -1-alcohol, trifluoromethanesulfonic acid, ethylene glycol diacrylate, 2-acrylamido-2-methylpropanesulfonic acid, ammonium bisulfite, ammonium persulfate and deionized water is as follows: 372 parts of bisphenolic acid, 88 parts of monoethanol diisopropanolamine, 144 parts of 2-methyl-2-propen-1-ol, 10 parts of trifluoromethanesulfonic acid, 640 parts of ethylene glycol diacrylate, 100 parts 2-Acrylamido-2-methylpropanesulfonic acid, 10 parts ammonium bisulfite, 5 parts ammonium persulfate, and 2000 parts deionized water.

一种机制砂混凝土拌合物和易性调节剂的制备方法,包括以下步骤:A preparation method of machine-made sand concrete mixture and workability regulator, comprising the following steps:

S1、向反应器中加入372份双酚酸、88份一乙醇二异丙醇胺、144份2-甲基-2-丙烯-1-醇和10份三氟甲磺酸,对其进行混合均匀,混合均匀后以180℃温度进行反应,反应3h后,降至室温并加入300份的去离子水,得到液体A;S1. Add 372 parts of bisphenolic acid, 88 parts of monoethanol diisopropanolamine, 144 parts of 2-methyl-2-propen-1-ol and 10 parts of trifluoromethanesulfonic acid into the reactor, and mix them evenly , after mixing evenly, react at a temperature of 180°C. After reacting for 3 hours, cool down to room temperature and add 300 parts of deionized water to obtain liquid A;

S2、取640份二丙烯酸乙二醇酯、100份2-丙烯酰胺基-2-甲基丙磺酸和10份亚硫酸氢氨,用400份的去离子水溶解,得到液体B;S2. Take 640 parts of ethylene glycol diacrylate, 100 parts of 2-acrylamido-2-methylpropanesulfonic acid and 10 parts of ammonium bisulfite, and dissolve them with 400 parts of deionized water to obtain liquid B;

S3、取5~10份过硫酸铵溶解在50份去离子水中,得到液体C;S3. Dissolving 5-10 parts of ammonium persulfate in 50 parts of deionized water to obtain liquid C;

S4、将剩余去离子水放入反应器中,升温至90℃,然后开启搅拌,接着分别滴加液体A、液体B、液体C,持续滴加2h并滴加完毕,保温1h,随后降至室温,即可得到机制砂混凝土拌合物和易性调节剂。S4. Put the remaining deionized water into the reactor, raise the temperature to 90°C, then start stirring, then add liquid A, liquid B, and liquid C dropwise respectively, continue to add dropwise for 2 hours and complete the dropwise addition, keep warm for 1 hour, and then drop to At room temperature, the machine-made sand concrete mixture and workability regulator can be obtained.

实施例3Example 3

一种机制砂混凝土拌合物和易性调节剂,包括双酚酸、二乙醇单异丙醇胺、2-甲基-2-丙烯-1-醇、三氟甲磺酸、二乙二醇单丙烯酸酯、2-丙烯酰胺基-2-甲基丙磺酸、亚硫酸氢氨、过硫酸铵和去离子水,双酚酸、二乙醇单异丙醇胺、2-甲基-2-丙烯-1-醇、三氟甲磺酸、二乙二醇单丙烯酸酯、2-丙烯酰胺基-2-甲基丙磺酸、亚硫酸氢氨、过硫酸铵和去离子水的重量份组成如下:300份双酚酸、150份二乙醇单异丙醇胺、85份2-甲基-2-丙烯-1-醇、20份三氟甲磺酸、500份二乙二醇单丙烯酸酯、120份2-丙烯酰胺基-2-甲基丙磺酸、8亚硫酸氢氨、8份过硫酸铵和1500份去离子水。A machine-made sand concrete mixture workability regulator, including bisphenolic acid, diethanol monoisopropanolamine, 2-methyl-2-propen-1-ol, trifluoromethanesulfonic acid, diethylene glycol Monoacrylate, 2-acrylamido-2-methylpropanesulfonic acid, ammonium bisulfite, ammonium persulfate and deionized water, bisphenolic acid, diethanol monoisopropanolamine, 2-methyl-2- Propylene-1-ol, trifluoromethanesulfonic acid, diethylene glycol monoacrylate, 2-acrylamido-2-methylpropanesulfonic acid, ammonium bisulfite, ammonium persulfate and deionized water in parts by weight As follows: 300 parts of bisphenolic acid, 150 parts of diethanol monoisopropanolamine, 85 parts of 2-methyl-2-propen-1-ol, 20 parts of trifluoromethanesulfonic acid, 500 parts of diethylene glycol monoacrylate , 120 parts of 2-acrylamido-2-methylpropanesulfonic acid, 8 parts of ammonium bisulfite, 8 parts of ammonium persulfate and 1500 parts of deionized water.

一种机制砂混凝土拌合物和易性调节剂的制备方法,包括以下步骤:A preparation method of machine-made sand concrete mixture and workability regulator, comprising the following steps:

S1、向反应器中加入300份双酚酸、150份二乙醇单异丙醇胺、85份2-甲基-2-丙烯-1-醇和20份三氟甲磺酸,对其进行混合均匀,混合均匀后以160℃温度进行反应,反应4h后,降至室温并加入250份的去离子水,得到液体A;S1. Add 300 parts of bisphenolic acid, 150 parts of diethanol monoisopropanolamine, 85 parts of 2-methyl-2-propen-1-ol and 20 parts of trifluoromethanesulfonic acid into the reactor, and mix them evenly , after mixing evenly, react at a temperature of 160°C. After reacting for 4 hours, cool down to room temperature and add 250 parts of deionized water to obtain liquid A;

S2、取500份二乙二醇单丙烯酸酯、120份2-丙烯酰胺基-2-甲基丙磺酸和8份亚硫酸氢氨,用500份的去离子水溶解,得到液体B;S2. Take 500 parts of diethylene glycol monoacrylate, 120 parts of 2-acrylamido-2-methylpropanesulfonic acid and 8 parts of ammonium bisulfite, and dissolve them with 500 parts of deionized water to obtain liquid B;

S3、取8份过硫酸铵溶解在50份去离子水中,得到液体C;S3. Dissolve 8 parts of ammonium persulfate in 50 parts of deionized water to obtain liquid C;

S4、将剩余去离子水放入反应器中,升温至70℃,然后开启搅拌,接着分别滴加液体A、液体B、液体C,持续滴加2.5h并滴加完毕,保温0.8h,随后降至室温,即可得到机制砂混凝土拌合物和易性调节剂。S4. Put the remaining deionized water into the reactor, raise the temperature to 70°C, then start stirring, then add liquid A, liquid B, and liquid C dropwise respectively, continue to add dropwise for 2.5h and complete the dropwise addition, keep warm for 0.8h, then When it is lowered to room temperature, the machine-made sand concrete mixture and the workability regulator can be obtained.

实施例4Example 4

一种机制砂混凝土拌合物和易性调节剂,包括双酚酸、醇胺、2-甲基-2-丙烯-1-醇、三氟甲磺酸、不饱和羧酸酯、2-丙烯酰胺基-2-甲基丙磺酸、亚硫酸氢氨、过硫酸铵和去离子水,双酚酸、醇胺、2-甲基-2-丙烯-1-醇、三氟甲磺酸、不饱和羧酸酯、2-丙烯酰胺基-2-甲基丙磺酸、亚硫酸氢氨、过硫酸铵和去离子水的重量份组成如下:320份双酚酸、132份醇胺、125份2-甲基-2-丙烯-1-醇、23份三氟甲磺酸、465份不饱和羧酸酯、125份2-丙烯酰胺基-2-甲基丙磺酸、7份亚硫酸氢氨、9份过硫酸铵和1400份去离子水;醇胺为一乙醇二异丙醇胺和二乙醇单异丙醇胺中的一种;不饱和羧酸酯为二乙二醇单丙烯酸酯和二丙烯酸乙二醇酯中的一种。A machine-made sand concrete mixture workability regulator, including bisphenolic acid, alcohol amine, 2-methyl-2-propen-1-ol, trifluoromethanesulfonic acid, unsaturated carboxylic acid ester, 2-propene Amino-2-methylpropanesulfonic acid, ammonium bisulfite, ammonium persulfate and deionized water, bisphenolic acid, alcohol amine, 2-methyl-2-propen-1-ol, trifluoromethanesulfonic acid, The parts by weight of unsaturated carboxylic acid ester, 2-acrylamido-2-methylpropanesulfonic acid, ammonium bisulfite, ammonium persulfate and deionized water are composed as follows: 320 parts of bisphenolic acid, 132 parts of alcohol amine, 125 parts Parts of 2-methyl-2-propen-1-ol, 23 parts of trifluoromethanesulfonic acid, 465 parts of unsaturated carboxylic acid esters, 125 parts of 2-acrylamido-2-methylpropanesulfonic acid, 7 parts of sulfurous acid Hydrogen ammonia, 9 parts of ammonium persulfate and 1400 parts of deionized water; alcohol amine is one of monoethanol diisopropanolamine and diethanol monoisopropanolamine; unsaturated carboxylic acid ester is diethylene glycol monoacrylic acid One of esters and glycol diacrylate.

一种机制砂混凝土拌合物和易性调节剂的制备方法,包括以下步骤:A preparation method of machine-made sand concrete mixture and workability regulator, comprising the following steps:

S1、向反应器中加入320份双酚酸、132份一乙醇二异丙醇胺、125份2-甲基-2-丙烯-1-醇和23份三氟甲磺酸,对其进行混合均匀,混合均匀后以120~180℃温度进行反应,反应3~6h后,降至室温并加入200~300份的去离子水,得到液体A;S1. Add 320 parts of bisphenolic acid, 132 parts of monoethanol diisopropanolamine, 125 parts of 2-methyl-2-propen-1-ol and 23 parts of trifluoromethanesulfonic acid into the reactor, and mix them evenly , after mixing evenly, react at a temperature of 120-180°C, react for 3-6 hours, cool down to room temperature and add 200-300 parts of deionized water to obtain liquid A;

S2、取465份不饱和羧酸酯、125份2-丙烯酰胺基-2-甲基丙磺酸和7份亚硫酸氢氨,用400~600份的去离子水溶解,得到液体B;S2. Take 465 parts of unsaturated carboxylic acid ester, 125 parts of 2-acrylamido-2-methylpropanesulfonic acid and 7 parts of ammonium bisulfite, and dissolve them with 400-600 parts of deionized water to obtain liquid B;

S3、取9份过硫酸铵溶解在50份去离子水中,得到液体C;S3. Dissolve 9 parts of ammonium persulfate in 50 parts of deionized water to obtain liquid C;

S4、将剩余去离子水放入反应器中,升温至60~90℃,然后开启搅拌,接着分别滴加液体A、液体B、液体C,持续滴加2~3h并滴加完毕,保温0.5~1h,随后降至室温,即可得到机制砂混凝土拌合物和易性调节剂。S4. Put the remaining deionized water into the reactor, raise the temperature to 60-90°C, then start stirring, then add liquid A, liquid B, and liquid C dropwise respectively, continue to add dropwise for 2-3 hours and complete the dropwise addition, and keep warm for 0.5 ~1h, and then lowered to room temperature, the machine-made sand concrete mixture and workability regulator can be obtained.

先通过双酚酸与醇胺、2-甲基-2-丙烯-1-醇进行酯化反应,再与不饱和羧酸酯、2-丙烯酰胺基-2-甲基丙磺酸聚合,其中的芳烃以及亲水性的氨基、羟基等基团,在混凝土多相非均一体系中,具有亲水效应,能提高羟基、酰胺基和磺酸基上的氧原子与水缔合形成氢键的能力,使游离水变成水泥浆体结合水,达到高的保水性、粘接性,同时也降低了溶液表面张力,使水泥颗粒更完善地与水接触,加速水对水泥颗粒的润湿、渗透和水泥水化;此外,也容易与金属离子形成共价键、发生络合,与金属离子形成较为稳定的络合物;这些络合物在溶液中形成了很多的可溶区,提高了水化产物的扩散速率,进而缩短了水泥水化过程中的潜伏期,有利于提高早期强度。First carry out esterification reaction with bisphenolic acid and alcohol amine, 2-methyl-2-propen-1-ol, and then polymerize with unsaturated carboxylic acid ester, 2-acrylamido-2-methylpropanesulfonic acid, wherein Aromatic hydrocarbons and hydrophilic amino groups, hydroxyl groups and other groups have a hydrophilic effect in the heterogeneous concrete system, which can improve the ability of oxygen atoms on hydroxyl groups, amido groups and sulfonic acid groups to associate with water to form hydrogen bonds. Ability to make free water into cement paste bound water, achieve high water retention and adhesion, and also reduce the surface tension of the solution, make the cement particles contact with water more perfectly, accelerate the wetting of cement particles by water, Infiltration and cement hydration; in addition, it is easy to form covalent bonds and complexes with metal ions, and form relatively stable complexes with metal ions; these complexes form a lot of soluble regions in the solution, improving the The diffusion rate of hydration products shortens the incubation period in the cement hydration process, which is beneficial to improve the early strength.

为了更好地说明本发明的技术效果,通过下述实验进行验证:In order to illustrate technical effect of the present invention better, verify by following experiment:

混凝土坍落度、扩展度、压力泌水率、含气量、抗压强度均按GB/T50080-2016《普通混凝土拌合物性能试验方法标准》进行,常用机制砂C30混凝土配合比为水泥:粉煤灰:机制砂:碎石:水:聚羧酸减水剂:机制砂混凝土调节剂=300:80:810:1020:170:7.6:2;其中:水泥为P.O42.5,粉煤灰为I级灰,市售机制砂为中砂(亚甲基蓝值为1.0,石粉含量7%),碎石粒径5~25mm,市售聚羧酸高性能减水剂含固量10%、掺量为胶凝材料用量的2%,水为自来水,本发明专用混凝土机制砂混凝土和易性调节剂2.0kg/m3,测试结果见表1。Concrete slump, expansion, pressure bleeding rate, air content, and compressive strength are all carried out in accordance with GB/T50080-2016 "Standards for Test Methods of Performance of Ordinary Concrete Mixtures". The commonly used machine-made sand C30 concrete mix ratio is cement: powder Coal ash: machine-made sand: gravel: water: polycarboxylate superplasticizer: machine-made sand concrete conditioner = 300: 80: 810: 1020: 170: 7.6: 2; among them: cement is P.O42.5, pulverized coal The ash is grade I ash, the commercially available machine-made sand is medium sand (methylene blue value is 1.0, stone powder content is 7%), the particle size of gravel is 5-25mm, and the commercially available polycarboxylate high-performance water reducer has a solid content of 10%, mixed with The amount is 2% of the amount of the cementitious material, the water is tap water, and the workability regulator of the special concrete machine-made sand concrete of the present invention is 2.0kg/m 3 . The test results are shown in Table 1.

同上,C30机制砂混凝土配合比为水泥:粉煤灰:机制砂:碎石:水:聚羧酸减水剂:机制砂混凝土调节剂=300:80:810:1020:170:7.6:2;其中:水泥为P.O42.5,粉煤灰为I级,市售机制砂为中砂(亚甲基蓝值为2.0,石粉含量12%),碎石粒径5~25mm,相同的市售聚羧酸高性能减水剂含固量10%、掺量为胶凝材料用量的2.3%,水为自来水,本发明专用混凝土机制砂混凝土调节剂2.0kg/m3,测试结果见表2。As above, the mix ratio of C30 machine-made sand concrete is cement: fly ash: machine-made sand: gravel: water: polycarboxylate superplasticizer: machine-made sand concrete regulator = 300: 80: 810: 1020: 170: 7.6: 2; Among them: cement is P.O42.5, fly ash is Class I, commercially available machine-made sand is medium sand (methylene blue value is 2.0, stone powder content is 12%), crushed stone particle size is 5-25mm, the same commercially available polycarboxylate The acid high-performance water reducer has a solid content of 10%, the dosage is 2.3% of the amount of the cementitious material, the water is tap water, and the special concrete machine-made sand concrete conditioner of the present invention is 2.0kg/m 3 . The test results are shown in Table 2.

其中,空白试验为未添加机制砂混凝土和易性调节剂。Among them, the blank test is without adding machine-made sand concrete and workability regulator.

表1 性能测试结果Table 1 Performance test results

Figure SMS_1
Figure SMS_1

表2 性能测试结果Table 2 Performance test results

Figure SMS_2
Figure SMS_2

从表1分析得出:与空白相比,加入市售的机制砂混凝土调节剂2kg/m3后,新拌混凝土的和易性有所改善,混凝土泌水率有所降低,但是混凝土拌合物经时坍落度和扩展度损失明显,对预拌混凝土的施工会有不利的影响,从混凝土拌合物坍落度、扩展度、倒置坍落度筒留下时间和压力泌水率对比来看,本发明的机制砂混凝土调节剂对混凝土拌合物黏聚性、保水性、和易性都有明显提高,可以满足工程泵送施工的需要。From the analysis in Table 1, it can be concluded that compared with the blank, after adding the commercially available machine-made sand concrete conditioner 2kg/ m3 , the workability of the freshly mixed concrete is improved, and the bleeding rate of the concrete is reduced, but the concrete mixing The loss of slump and expansion over time is obvious, which will have an adverse effect on the construction of ready-mixed concrete. From the comparison of slump, expansion, inverted slump cylinder retention time and pressure bleeding rate of concrete mixture It can be seen that the machine-made sand concrete conditioner of the present invention can significantly improve the cohesiveness, water retention and workability of the concrete mixture, and can meet the needs of engineering pumping construction.

从表2分析得出:机制砂为中砂(亚甲基蓝值为2.0,石粉含量12%)时,说明机制砂中的含泥量和石粉含量都提高的情况下,空白混凝土的初始和易性也有明显的提高,但是经时坍落度和扩展度损失明显,不利于工程泵送混凝土的施工,加入市售的机制砂混凝土调节剂2kg/m3后,新拌混凝土的和易性进一步有所改善,混凝土泌水率进一步降低,但是混凝土拌合物经时坍落度和扩展度损失明显,对预拌混凝土的施工会有不利的影响。From the analysis in Table 2, it can be concluded that when the machine-made sand is medium sand (methylene blue value is 2.0, and the stone powder content is 12%), it shows that when the mud content and stone powder content in the machine-made sand are increased, the initial workability of the blank concrete also increases. It is obviously improved, but the loss of slump and expansion over time is obvious, which is not conducive to the construction of engineering pumped concrete. After adding the commercially available machine-made sand concrete conditioner 2kg/ m3 , the workability of fresh concrete is further improved. Improvement, the concrete bleeding rate is further reduced, but the slump and expansion of the concrete mixture lose significantly over time, which will have an adverse effect on the construction of ready-mixed concrete.

新拌混凝土的和易性是流动性、粘聚性和保水性的综合体现,新拌混凝土的流动性、粘聚性和保水性之间既互相联系,又常存在矛盾。因此,在一定施工工艺的条件下,新拌混凝土的和易性是以上三方面性质的矛盾统一。混凝土拌合物的和易性是一综合概念,难以用一种简单的评定方法来全面恰当地表达,通常是采用坍落度试验测定混凝土拌合物的流动性。The workability of fresh concrete is a comprehensive manifestation of fluidity, cohesion and water retention. The fluidity, cohesion and water retention of fresh concrete are interrelated and often contradictory. Therefore, under the condition of a certain construction technology, the workability of fresh concrete is the contradictory unity of the above three aspects. The workability of concrete mixture is a comprehensive concept, and it is difficult to fully and properly express it with a simple evaluation method. Usually, the slump test is used to measure the fluidity of concrete mixture.

由此可以分析得出:加入本发明混凝土机制砂混凝土调节剂后,混凝土初始坍落度和扩展度有所增加,说明机制砂混凝土的和易性改善明显,而且混凝土拌合物经时坍落度和扩展度损失较小,对预拌混凝土的施工几乎没有不利的影响,说明本发明混凝土机制砂混凝土调节剂具有一定的阻止泥粉吸附外加剂的效果,混凝土和易性的改善,对促进混凝土7d、28d抗压强度的提高也有益。This can be analyzed and drawn: after adding the concrete machine-made sand concrete conditioner of the present invention, the initial slump and expansion of the concrete increase, indicating that the workability of the machine-made sand concrete is significantly improved, and the concrete mixture slumps over time The loss of degree of expansion and expansion is small, and there is almost no adverse effect on the construction of ready-mixed concrete. It shows that the concrete machine-made sand concrete conditioner of the present invention has a certain effect of preventing the mud powder from adsorbing the admixture, and the improvement of the workability of the concrete is beneficial to the promotion. The improvement of the compressive strength of concrete 7d and 28d is also beneficial.

对于本领域技术人员而言,显然本发明不限于上述示范性实施例的细节,而且在不背离本发明的精神或基本特征的情况下,能够以其他的具体形式实现本发明。因此,无论从哪一点来看,均应将实施例看作是示范性的,而且是非限制性的,本发明的范围由所附权利要求而不是上述说明限定,因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention.

此外,应当理解,虽然本说明书按照实施方式加以描述,但并非每个实施方式仅包含一个独立的技术方案,说明书的这种叙述方式仅仅是为清楚起见,本领域技术人员应当将说明书作为一个整体,各实施例中的技术方案也可以经适当组合,形成本领域技术人员可以理解的其他实施方式。In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only includes an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (8)

1. The machine-made sand concrete mixture and workability regulator is characterized by comprising diphenolic acid, alcohol amine, 2-methyl-2-propylene-1-ol, trifluoromethanesulfonic acid, unsaturated carboxylic acid ester, 2-acrylamido-2-methylpropanesulfonic acid, ammonium bisulfate, ammonium persulfate and deionized water, wherein the diphenolic acid, the alcohol amine, the 2-methyl-2-propylene-1-ol, the trifluoromethanesulfonic acid, the unsaturated carboxylic acid ester, the 2-acrylamido-2-methylpropanesulfonic acid, the ammonium bisulfate, the ammonium persulfate and the deionized water are composed of the following components in parts by weight: 286-372 parts of diphenolic acid, 88-177 parts of alcohol amine, 72-144 parts of 2-methyl-2-propylene-1-ol, 10-30 parts of trifluoromethanesulfonic acid, 320-640 parts of unsaturated carboxylic acid ester, 100-150 parts of 2-acrylamido-2-methylpropanesulfonic acid, 5-10 parts of ammonium bisulfate, 5-10 parts of ammonium persulfate and 1000-2000 parts of deionized water.
2. The machine-made sand concrete mix and workability adjustment agent as claimed in claim 1, characterized in that the alcohol amine is one of triethanolamine, monoethanol diisopropanolamine and diethanol monoisopropanolamine.
3. The machine-made sand concrete mix and workability adjustment agent of claim 1, wherein the unsaturated carboxylic acid ester is one of diethylene glycol monoacrylate and ethylene glycol diacrylate.
4. A method for preparing a ready-made sand concrete mix and workability adjustment agent according to any of claims 1 to 3, characterized in that it comprises the following steps:
s1, adding 286-372 parts of diphenolic acid, 88-177 parts of monoethanol diisopropanolamine, 72-144 parts of 2-methyl-2-propylene-1-ol and 10-30 parts of trifluoromethanesulfonic acid into a reactor, uniformly mixing, reacting at a certain temperature after uniform mixing, cooling to room temperature after a period of time, and adding 200-300 parts of deionized water to obtain a liquid A;
s2, dissolving 320-640 parts of unsaturated carboxylic ester, 100-150 parts of 2-acrylamide-2-methylpropanesulfonic acid and 5-10 parts of ammonium bisulfide with 400-600 parts of deionized water to obtain a liquid B;
s3, dissolving 5-10 parts of ammonium persulfate in 50 parts of deionized water to obtain liquid C;
and S4, placing the rest deionized water into a reactor, heating to a certain temperature, then starting stirring, then respectively dripping the liquid A, the liquid B and the liquid C, continuously dripping for a certain time, preserving heat for a period of time, and then cooling to room temperature to obtain the machine-made sand concrete mixture and the workability regulator.
5. The method for preparing the machine-made sand concrete mixture and the workability regulator according to claim 4, wherein the reaction temperature after being uniformly mixed in the step S1 is 120-180 ℃ and the reaction time is 3-6 h.
6. The method for preparing a machine-made sand concrete mixture and workability adjustment agent as claimed in claim 4, wherein the certain temperature in S4 is 60-90 ℃.
7. The method for preparing a machine-made sand concrete mixture and an workability adjustment agent according to claim 4, wherein the continuous dripping time in S4 is 2-3 hours.
8. The method for preparing the ready made sand concrete mixture and the workability adjustment agent according to claim 4, wherein the heat preservation time in the step S4 is 0.5-1 h.
CN202310195191.0A 2023-03-03 2023-03-03 Workability regulator for machine-made sand concrete mixture and preparation method thereof Pending CN116375929A (en)

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