CN102701679B - Antifreeze ready mixed mortar and preparation method thereof - Google Patents

Antifreeze ready mixed mortar and preparation method thereof Download PDF

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Publication number
CN102701679B
CN102701679B CN201210194921.7A CN201210194921A CN102701679B CN 102701679 B CN102701679 B CN 102701679B CN 201210194921 A CN201210194921 A CN 201210194921A CN 102701679 B CN102701679 B CN 102701679B
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cement
mortar
antifreeze
swelling agent
water reducer
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CN102701679A (en
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俞海军
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JIANGSU JIANHUA NEW WALL MATERIAL CO Ltd
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JIANGSU JIANHUA NEW WALL MATERIAL CO Ltd
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Abstract

The invention discloses antifreeze ready mixed mortar, which comprises the following components by weight percentages: 20 to 35% of cement, 60 to 79% of medium and fine-grained sand, 0.05 to 0.3% of cellulose ether polymer, 0.1 to 2.0% of engineering fiber, 0.1 to 4.0% of bulking agent, 0.1 to 1.0% of water reducing agent and 0.1 to 1.0% of antifreeze. The antifreeze ready mixed mortar provided by the invention comprises sodium nitrite and other antifreezes, so that the problem that the internal structure of the ready mixed mortar used in winter is damaged by freezing and thawing can be effectively solved, the clotting time of mortar is obviously shortened, the antifreeze performance of mortar is improved, and the durability of mortar is improved. The antifreeze ready mixed mortar is convenient to use, a time-consuming and labor-consuming wind proofing fence which is used in winter construction is avoided being used, the preparation method is simple, and the cost is low.

Description

A kind of antifreeze premixing mortar and preparation method thereof
Technical field
The present invention relates to a kind of premixing mortar and preparation method thereof, particularly a kind of antifreeze premixing mortar and preparation method thereof.
Background technology
Premixing mortar refers to by specialized manufacturer production, for the various mortar mixtures of construction project, is a kind of New Building Materials that China's developed recently gets up, and can be divided into common premixing mortar and extraordinary mortar by performance.Ordinary mortar mainly comprises masonry mortar, motar, ground mortar.Masonry mortar, motar are mainly used in building by laying bricks or stones and plastering of various concrete bricks, flyash brick and clay brick in bearing wall, non-load bearing wall, and ground mortar is for the floor leveling of common and special occasions.Extraordinary mortar comprises thermal insulation mortar, decoration mortar, gravity flowing levelling mortar, waterproof mortar etc., and its purposes is also varied, is widely used in building exterior wall heat preserving, upholstery repairing etc.
Premixing mortar is as a kind of novel green material of construction; due to its economizing on resources, protection of the environment, guarantee construction engineering quality, realize the aspects such as resource reutilization and there is significant advantage; its development has not only fully demonstrated the national strategy and policy that realize energy-saving and emission-reduction, is also one of the tangible behave of recycling economy that promotes development.
But intensity and the workability deficiency of the premixing mortar using at present, only can only meet site operation requirement; And for winter construction, the premixing mortar using is at present long time of coagulation, and destroy because freeze thawing causes mortar internal structure, therefore anti-freezing property is poor; While self meeting dry shrinkage, the problems such as appearance is ftractureed, water resistance is poor, poor durability.
Summary of the invention
Technical problem to be solved: in order to solve the defect that existing premixing mortar use in winter time of coagulation is long, anti-freezing property is poor, the invention provides a kind of antifreeze premixing mortar and preparation method thereof.
Technical scheme: in order to solve the problems of the technologies described above, the invention provides a kind of new premixing mortar, comprise the component of following weight ratio: cement 20~35%, middle fine sand 60~79%, cellulose ethers high molecular polymer 0.05~0.3%, technical fiber 0.1~2.0%, swelling agent 0.1~4.0%, water reducer 0.1~1.0 and frostproofer 0.1~1.0%.
One as the antifreeze premixing mortar of the present invention is preferred, and described frostproofer is selected from one or more the mixture in Sodium Nitrite, sodium-chlor and calcium chloride; Thereby reduce this premixing mortar time of coagulation in winter, improve its anti-freezing property.
Another kind as the antifreeze premixing mortar of the present invention is preferred, and described cement is silicate cement, ordinary Portland cement, Portland blast furnace slag cement, Portland fly ash cement or composite Portland cement; To guarantee the strength property of this premixing mortar.
Another kind as the antifreeze premixing mortar of the present invention is preferred, and the fineness modulus of described middle fine sand is 1.6-2.3; Thereby make premixing mortar even, to guarantee the strength property of this premixing mortar.
In order to improve this antifreeze premixing mortar waterproof impervious characteristic, promote the weather resistance of premixing mortar, the present invention has also optimized the formula of premixing mortar:
Described cellulose ethers high molecular polymer is one or both in methyl cellulose ether and hydroxypropyl methyl cellulose ether;
Described technical fiber is one or both in polypropylene fibre and glass fibre;
Described swelling agent is any one or several mixture in UEA swelling agent, calcium oxide swelling agent, iron filings swelling agent and alumite plumping agent;
Described water reducer is that naphthalene is any one or several mixture in pulvis water reducer, aliphatics pulvis water reducer and poly carboxylic acid pulvis water reducer.
The present invention also provides the preparation method of this antifreeze premixing mortar, comprises the following steps:
1) middle fine sand is dried to water ratio below 0.5%, screens out the particle that is greater than 4.75mm;
2) cellulose ethers high molecular polymer, technical fiber, swelling agent, water reducer and frostproofer are added in cement, and stir, obtain additive cement admixture;
3) the middle fine sand after sieving and additive cement admixture are stirred, to obtain final product.
Wherein, each weight percentages of components is respectively: cement 20~35%, middle fine sand 60~79%, cellulose ethers high molecular polymer 0.05~0.3%, technical fiber 0.1~2.0%, swelling agent 0.1~4.0%, water reducer 0.1~1.0 and frostproofer 0.1~1.0%.
Beneficial effect: antifreeze premixing mortar provided by the invention comprises the frostproofers such as Sodium Nitrite, the premixing mortar that can effectively overcome use in winter destroys because freeze thawing causes mortar internal structure, significantly shorten mortar coagulation time, improve mortar anti-freezing property, improve the weather resistance of mortar.This antifreeze premixing mortar is easy to use, has avoided the protective grating that keeps out the wind of winter construction working costs effort, and preparation method is simple, cost is low.
Meanwhile, antifreeze premixing mortar provided by the invention comprises the additives such as cellulose ethers high molecular polymer, technical fiber, swelling agent and water reducer, has guaranteed the mix such as mortar strength, denseness performance; Can effectively solve the problem of existing mortar self dry shrinkage, thereby guarantee that mortar is closely connected with concrete member, improve mortar waterproof impervious characteristic, promote the weather resistance of premixing mortar.
Embodiment
In following examples, if no special instructions, per-cent all refers to weight percent.
Embodiment 1
Premixing mortar, comprises the component of following weight percent: middle fine sand 60%, cellulose ethers high molecular polymer 0.3%, technical fiber 2.0%, swelling agent 1.2%, water reducer 1.0%, frostproofer 0.5% that silicate cement 35%, fineness modulus are 1.6-2.3.
Wherein,
Cellulose ethers high molecular polymer is methyl cellulose ether;
Technical fiber is polypropylene fibre;
Swelling agent is UEA-IV swelling agent;
Water reducer is that naphthalene is pulvis water reducer;
Frostproofer is Sodium Nitrite.
Preparation method is as follows:
1) middle fine sand is dried to water ratio below 0.5%, screens out the particle that is greater than 4.75mm, obtaining fineness modulus is the middle fine sand of 1.6-2.3;
2) cellulose ethers high molecular polymer, technical fiber, swelling agent, water reducer and frostproofer are added in cement, and stir, obtain additive cement admixture;
3) the middle fine sand after sieving and additive cement admixture are stirred, obtaining strength grade is the anti-freeze type dry-mixed mortar of M10.
Embodiment 2
Premixing mortar, comprises the component of following weight percent: middle fine sand 64.7%, cellulose ethers high molecular polymer 0.1%, technical fiber 0.1%, swelling agent 4.0%, water reducer 0.1%, frostproofer 1.0% that ordinary Portland cement 30%, fineness modulus are 1.6-2.3.
Wherein,
Described cellulose ethers high molecular polymer is hydroxypropyl methyl cellulose ether;
Technical fiber is glass fibre;
Swelling agent is the mixture of UEA swelling agent, calcium oxide swelling agent, iron filings swelling agent and alum swelling agent;
Water reducer is poly carboxylic acid pulvis water reducer;
Frostproofer is sodium-chlor.
Preparation method is as follows:
1) middle fine sand is dried to water ratio below 0.5%, screens out the particle that is greater than 4.75mm, obtaining fineness modulus is the middle fine sand of 1.6-2.3;
2) cellulose ethers high molecular polymer, technical fiber, swelling agent, water reducer and frostproofer are added in cement, and stir, obtain additive cement admixture;
3) the middle fine sand after sieving and additive cement admixture are stirred, obtaining strength grade is the anti-freeze type dry-mixed mortar of M10.
Embodiment 3
Premixing mortar, comprises the component of following weight percent: middle fine sand 70%, cellulose ethers high molecular polymer 0.2%, technical fiber 1.0%, swelling agent 0.1%, water reducer 1.0%, frostproofer 0.1% that Portland blast furnace slag cement 27.6%, fineness modulus are 1.6-2.3.
Wherein,
Described cellulose ethers high molecular polymer is the mixture of methyl cellulose ether and hydroxypropyl methyl cellulose ether;
Technical fiber is the mixture of polypropylene fibre and glass fibre;
Swelling agent is iron filings swelling agent;
Water reducer is aliphatics pulvis water reducer;
Frostproofer is calcium chloride.
Preparation method is as follows:
1) middle fine sand is dried to water ratio below 0.5%, screens out the particle that is greater than 4.75mm, obtaining fineness modulus is the middle fine sand of 1.6-2.3;
2) cellulose ethers high molecular polymer, technical fiber, swelling agent, water reducer and frostproofer are added in cement, and stir, obtain additive cement admixture;
3) the middle fine sand after sieving and additive cement admixture are stirred, obtaining strength grade is the anti-freeze type dry-mixed mortar of M10.
Embodiment 4
Premixing mortar, comprise the component of following weight percent: middle fine sand 79%, hydroxypropyl methyl cellulose ether 0.05%, glass fibre 0.1% that Portland fly ash cement 20%, fineness modulus are 1.6-2.3, iron oxides swelling agent 0.45%, water reducer 0.2%, frostproofer 0.2%.
Preparation method is as follows:
1) middle fine sand is dried to water ratio below 0.5%, screens out the particle that is greater than 4.75mm, obtaining fineness modulus is the middle fine sand of 1.6-2.3;
2) cellulose ethers high molecular polymer, technical fiber, swelling agent, water reducer and frostproofer are added in cement, and stir, obtain additive cement admixture;
3) the middle fine sand after sieving and additive cement admixture are stirred, obtaining strength grade is the anti-freeze type dry-mixed mortar of M10.
Wherein,
Described cellulose ethers high molecular polymer is hydroxypropyl methyl cellulose ether;
Technical fiber is glass fibre;
Swelling agent is the mixture of UEA swelling agent, iron filings swelling agent and alum swelling agent;
Water reducer is that naphthalene is pulvis water reducer, aliphatics pulvis water reducer and poly carboxylic acid pulvis water reducer;
Frostproofer is the mixture of Sodium Nitrite, sodium-chlor and calcium chloride.
Embodiment 5
The premixing mortar of the present embodiment and preparation thereof and embodiment 1 method are basic identical, and difference is:
Swelling agent is calcium oxide swelling agent;
Water reducer is that naphthalene is pulvis water reducer and poly carboxylic acid pulvis water reducer;
Frostproofer is the mixture of sodium-chlor and calcium chloride.
Embodiment 6
The premixing mortar of the present embodiment and preparation thereof and embodiment 1 method are basic identical, and difference is:
Swelling agent is UEA swelling agent;
Water reducer is aliphatics pulvis water reducer and poly carboxylic acid pulvis water reducer;
Frostproofer is the mixture of Sodium Nitrite and calcium chloride.
Embodiment 7
Antifreeze premixing mortar, comprise the component of following weight percent: composite Portland cement 25%, middle fine sand 72.225%, cellulose ethers high molecular polymer 0.5%, polypropylene fibre 0.05%, swelling agent 2%, water reducer 0.125%, Sunmorl N 60S 0.1%, obtain the premixing mortar that strength grade is M10.
Embodiment 8
Antifreeze premixing mortar, comprise the component of following weight percent: silicate cement 25%, middle fine sand 72.225%, cellulose ethers high molecular polymer 0.5%, polypropylene fibre 0.05%, swelling agent 2%, water reducer 0.125%, carbohydrate 0.1%, obtain the premixing mortar that strength grade is M10.
Embodiment 9
The performance perameter of premixing mortar described in mensuration embodiment 1 to 8: time of coagulation, mortar strength measuring method adopt this area common method to measure, and the results are shown in Table 1.
The performance perameter of premixing mortar described in table 1 embodiment 1 to 8
Wherein, described ordinary mortar is the mortar that does not add frostproofer.
Meanwhile, not easy to crack after the premixing mortar use in winter of embodiment 1 to 8, and common premixing mortar easily ftractures.

Claims (7)

1. an antifreeze premixing mortar, is characterized in that: the component that comprises following weight percent: cement 20~35%, middle fine sand 60~79%, cellulose ethers high molecular polymer 0.05~0.3%, technical fiber 0.1~2.0%, swelling agent 0.1~4.0%, water reducer 0.1~1.0% and frostproofer 0.1~1.0%; The fineness modulus of described middle fine sand is 1.6-2.3; Described technical fiber is one or both in polypropylene fibre and glass fibre.
2. the antifreeze premixing mortar of one according to claim 1, is characterized in that: described frostproofer is selected from one or more the mixture in Sodium Nitrite, sodium-chlor and calcium chloride.
3. the antifreeze premixing mortar of one according to claim 1, is characterized in that: described cement is silicate cement, ordinary Portland cement, Portland blast furnace slag cement, Portland fly ash cement or composite Portland cement.
4. the antifreeze premixing mortar of one according to claim 1, is characterized in that: described cellulose ethers high molecular polymer is one or both in methyl cellulose ether and hydroxypropyl methyl cellulose ether.
5. the antifreeze premixing mortar of one according to claim 1, is characterized in that: described swelling agent is any one or several mixture in UEA swelling agent, calcium oxide swelling agent, iron filings swelling agent and alumite plumping agent.
6. the antifreeze premixing mortar of one according to claim 1, is characterized in that: described water reducer is that naphthalene is any one or several mixture in pulvis water reducer, aliphatics pulvis water reducer and poly carboxylic acid pulvis water reducer.
7. the preparation method of an antifreeze premixing mortar: it is characterized in that: comprise the following steps:
(1) middle fine sand is dried to water ratio below 0.5%, screens out the particle that is greater than 4.75mm;
(2) cellulose ethers high molecular polymer, technical fiber, swelling agent, water reducer and frostproofer are added in cement, and stir, obtain additive cement admixture;
(3) the middle fine sand after sieving and additive cement admixture are stirred, to obtain final product;
Wherein, each raw material weight per-cent is respectively: cement 20~35%, middle fine sand 60~79%, cellulose ethers high molecular polymer 0.05~0.3%, technical fiber 0.1~2.0%, swelling agent 0.1~4.0%, water reducer 0.1~1.0% and frostproofer 0.1~1.0%.
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CN106946487A (en) * 2017-03-02 2017-07-14 安徽鑫固环保股份有限公司 A kind of wet mixing mortar antifreeze additive and preparation method thereof
CN107010867A (en) * 2017-03-02 2017-08-04 安徽鑫固环保股份有限公司 A kind of compound early-strength anti-freezing wet mixing mortar additive and preparation method thereof
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CN106927712A (en) * 2017-03-02 2017-07-07 安徽鑫固环保股份有限公司 A kind of high-strength antifreeze bicomponent mortar additive and preparation method thereof
CN107473648A (en) * 2017-09-29 2017-12-15 徐州金盟新型建材有限公司 A kind of composite cement mortar
CN108751884A (en) * 2018-07-26 2018-11-06 成都理工大学 A kind of low-temperature nano complex cement
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