CN105084843A - High-performance cracking prevention self-leveling cement and producing method thereof - Google Patents
High-performance cracking prevention self-leveling cement and producing method thereof Download PDFInfo
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- CN105084843A CN105084843A CN201510483633.7A CN201510483633A CN105084843A CN 105084843 A CN105084843 A CN 105084843A CN 201510483633 A CN201510483633 A CN 201510483633A CN 105084843 A CN105084843 A CN 105084843A
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Abstract
The invention discloses high-performance cracking prevention self-leveling cement. The high-performance cracking prevention self-leveling cement is composed of, by weight, 15-25 parts of sulphate aluminium cement, 10-20 parts of ordinary portland cement, 5-10 parts of ground calcium carbonate, 4-5 parts of alpha-semi-hydrated gypsum, 1-2 parts of talcum powder, 0.3-0.7 part of cellulose, 0.8-1 part of water-soluble dispersible adhesive powder, 0.5-0.8 part of water reducing agent, 0.8-1.5 parts of antifoaming agents and 42-55 parts of quartz sand. The producing method includes the steps of weighing, primary mixing and secondary mixing. The self-leveling cement has the advantages of being high in bonding intensity, not prone to cracking, high in surface wear resistance and good in self-leveling performance and quality stability. The producing method of the self-leveling cement has the advantages of being easy to implement, convenient to produce and low in cost and is suitable for industrialized mass production.
Description
Technical field
The present invention relates to a kind of material of construction, relate in particular to a kind of high-performance crack resistence self-leveling cement and preparation method thereof.
Background technology
Self-leveling cement is a kind of high-new environmentfriendly products of high in technological content, sport technique segment more complicated.It is the type that the is dry mixed powder material being become to be grouped into by various active, and scene is mixed water and can be used.Slightly launch through scraper, high flat surfaces can be obtained.Setting rate is fast, can go up people's walking after 4-5 hours, can carry out surface construction (as paving timber floor, adamantine plate etc.) after 24 hours, quick construction, easy be Traditional Man levelling incomparable.It is safe, pollution-free, attractive in appearance, come into operation fast, is the feature of self-leveling cement.It enhance the operational procedure of civilization, create the comfortable smooth space of high-quality, the paving of diversified finishing material, allow life add gorgeous color.Self-leveling cement is of many uses, can be used for industrial premises, workshop, storage, market, exhibition room, gymnasium, hospital, the various open space of office.Can be used as facing surface layer, also can be used as wear-resisting basic unit.
In recent years, successively research and production goes out self-leveling cement or gravity flowing levelling mortar, and binding agent used mainly rubber powder, containing unstable citric acid molecule in raw material used, the cohesive strength that still there is self-leveling cement is low, easy to crack, surface abrasion resistance is not high, Self-leveling performance and quality stability desirable all not enough, the needs of modern architecture can not be met completely.
Summary of the invention
The object of the invention is to the shortcoming overcoming prior art, a kind of high-performance crack resistence self-leveling cement be provided, this self-leveling cement has that viscosity intensity is high, not easy to crack, surface abrasion resistance is high, Self-leveling performance and the good feature of quality stability.
Another object of the present invention is to the preparation method providing a kind of high-performance crack resistence self-leveling cement, the method has simple to operate, easy to prepare, that cost is low characteristic, is applicable to industrialization scale operation.
Object of the present invention is achieved through the following technical solutions: a kind of high-performance crack resistence self-leveling cement, and it is made up of the raw material of following weight parts:
Further, the order number of described quartz sand is 40 ~ 120 orders.
A preparation method for high-performance crack resistence self-leveling cement, it comprises the following steps:
S1. weigh: take each raw material by above-mentioned weight ratio, for subsequent use;
S2. mixed once: coarse whiting, ɑ-semi-hydrated gypsum, talcum powder, Mierocrystalline cellulose, water-soluble, dispersible rubber powder, water reducer, defoamer are dropped in mixing machine and carry out mixed once, the rotating speed of mixing machine is 1300 ~ 1700rad/min, mixing time is 4 ~ 8min, is mixing masterbatch;
S3. two mixing: aluminosulfate cement, ordinary Portland cement, quartz sand are joined in the mixing masterbatch of step S2 gained, mix and blend 4 ~ 8min under 2300 ~ 2700rad/min rotating speed, obtained high-performance crack resistence self-leveling cement.
Further, mixing machine described in step S2 is vertical dry powder blender.
Further, in step S3, mix and blend adopts the agravic mixing and blending machine of round trip flight cutter.
In the present invention, the interpolation of gypsum plays vital impact for the ratio of shrinkage swelling in self-leveling cement ternary system and intensity, experiment shows: the selection of species of gypsum and addition directly can affect self-leveling cement early late strength and ratio of shrinkage swelling, especially cause quality problems to causing terrace to ftracture after self-leveling cement construction because size changing rate is excessive.
The present invention adopts and add αsemiwatergypsum in self-leveling cement, be different from the application that tradition adds full water gypsum, β semi-hydrated gypsum, show through many experiments, the addition of 4-5% both met self-leveling cement early, late strength requirement, control to greatest extent simultaneously self-leveling cement because of dilation coefficient excessive, after construction because of terrace problems of crack that size changing rate causes greatly.
The present invention has the following advantages: self-leveling cement of the present invention has that viscosity intensity is high, not easy to crack, surface abrasion resistance is high, Self-leveling performance and the good feature of quality stability; The preparation method of high-performance crack resistence self-leveling cement has simple to operate, easy to prepare, that cost is low characteristic, is applicable to industrialization scale operation.
Embodiment
Below in conjunction with embodiment, the present invention will be further described, and protection scope of the present invention is not limited to the following stated.
Embodiment 1: a kind of high-performance crack resistence self-leveling cement, it is made up of the raw material of following weight parts:
A preparation method for high-performance crack resistence self-leveling cement, it comprises the following steps:
S1. weigh: take each raw material by above-mentioned weight ratio, for subsequent use;
S2. mixed once: coarse whiting, ɑ-semi-hydrated gypsum, talcum powder, Mierocrystalline cellulose, water-soluble, dispersible rubber powder, water reducer, defoamer are dropped in vertical dry powder blender and carry out mixed once, the rotating speed of mixing machine is 1300rad/min, mixing time is 4min, is mixing masterbatch;
S3. two mixing: aluminosulfate cement, ordinary Portland cement, quartz sand are joined in the mixing masterbatch of step S2 gained, mix and blend 4min under employing round trip flight cutter agravic mixing and blending machine 2300rad/min rotating speed, obtained high-performance crack resistence self-leveling cement.
Embodiment 2: a kind of high-performance crack resistence self-leveling cement, it is made up of the raw material of following weight parts:
A preparation method for high-performance crack resistence self-leveling cement, it comprises the following steps:
S1. weigh: take each raw material by above-mentioned weight ratio, for subsequent use;
S2. mixed once: coarse whiting, ɑ-semi-hydrated gypsum, talcum powder, Mierocrystalline cellulose, water-soluble, dispersible rubber powder, water reducer, defoamer are dropped in vertical dry powder blender and carry out mixed once, the rotating speed of mixing machine is 1700rad/min, mixing time is 8min, is mixing masterbatch;
S3. two mixing: aluminosulfate cement, ordinary Portland cement, quartz sand are joined in the mixing masterbatch of step S2 gained, mix and blend 8min under employing round trip flight cutter agravic mixing and blending machine 2700rad/min rotating speed, obtained high-performance crack resistence self-leveling cement.
Embodiment 3: a kind of high-performance crack resistence self-leveling cement, it is made up of the raw material of following weight parts:
A preparation method for high-performance crack resistence self-leveling cement, it comprises the following steps:
S1. weigh: take each raw material by above-mentioned weight ratio, for subsequent use;
S2. mixed once: coarse whiting, ɑ-semi-hydrated gypsum, talcum powder, Mierocrystalline cellulose, water-soluble, dispersible rubber powder, water reducer, defoamer are dropped in vertical dry powder blender and carry out mixed once, the rotating speed of mixing machine is 1450rad/min, mixing time is 5min, is mixing masterbatch;
S3. two mixing: aluminosulfate cement, ordinary Portland cement, quartz sand are joined in the mixing masterbatch of step S2 gained, mix and blend 5min under employing round trip flight cutter agravic mixing and blending machine 2500rad/min rotating speed, obtained high-performance crack resistence self-leveling cement.
Embodiment 4: a kind of high-performance crack resistence self-leveling cement, it is made up of the raw material of following weight parts:
A preparation method for high-performance crack resistence self-leveling cement, it comprises the following steps:
S1. weigh: take each raw material by above-mentioned weight ratio, for subsequent use;
S2. mixed once: coarse whiting, ɑ-semi-hydrated gypsum, talcum powder, Mierocrystalline cellulose, water-soluble, dispersible rubber powder, water reducer, defoamer are dropped in vertical dry powder blender and carry out mixed once, the rotating speed of mixing machine is 1600rad/min, mixing time is 6min, is mixing masterbatch;
S3. two mixing: aluminosulfate cement, ordinary Portland cement, quartz sand are joined in the mixing masterbatch of step S2 gained, mix and blend 7min under employing round trip flight cutter agravic mixing and blending machine 2650rad/min rotating speed, obtained high-performance crack resistence self-leveling cement.
Below by way of description of test beneficial effect of the present invention:
Test the performance of high-performance crack resistence self-leveling cement prepared by above-described embodiment 1-4, test result is as shown in table 1.
Table 1: the performance test results of high-performance crack resistence self-leveling cement
Claims (5)
1. a high-performance crack resistence self-leveling cement, is characterized in that, it is made up of the raw material of following weight parts:
Aluminosulfate cement: 15 ~ 25; Ordinary Portland cement: 10 ~ 20;
Coarse whiting: 5 ~ 10; ɑ-semi-hydrated gypsum: 4 ~ 5;
Talcum powder: 1 ~ 2; Mierocrystalline cellulose: 0.3 ~ 0.7;
Water-soluble, dispersible rubber powder: 0.8 ~ 1; Water reducer: 0.5 ~ 0.8;
Defoamer: 0.8 ~ 1.5; Quartz sand: 42 ~ 55.
2. a kind of high-performance crack resistence self-leveling cement as claimed in claim 1, is characterized in that, the order number of described quartz sand is 40 ~ 120 orders.
3. the preparation method of a kind of high-performance crack resistence self-leveling cement as claimed in claim 1 or 2, it is characterized in that, it comprises the following steps:
S1. weigh: take each raw material by above-mentioned weight ratio, for subsequent use;
S2. mixed once: coarse whiting, ɑ-semi-hydrated gypsum, talcum powder, Mierocrystalline cellulose, water-soluble, dispersible rubber powder, water reducer, defoamer are dropped in mixing machine and carry out mixed once, the rotating speed of mixing machine is 1300 ~ 1700rad/min, mixing time is 4 ~ 8min, is mixing masterbatch;
S3. two mixing: aluminosulfate cement, ordinary Portland cement, quartz sand are joined in the mixing masterbatch of step S2 gained, mix and blend 4 ~ 8min under 2300 ~ 2700rad/min rotating speed, obtained high-performance crack resistence self-leveling cement.
4. the preparation method of a kind of high-performance crack resistence self-leveling cement as claimed in claim 3, it is characterized in that, mixing machine described in step S2 is vertical dry powder blender.
5. the preparation method of a kind of high-performance crack resistence self-leveling cement as claimed in claim 3, is characterized in that, in step S3, mix and blend adopts the agravic mixing and blending machine of round trip flight cutter.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108178590A (en) * | 2018-02-08 | 2018-06-19 | 灵猫（广州）新材料科技有限公司 | It is a kind of to polish the high performance cement base self leveling material with metal sense |
| CN113502976A (en) * | 2021-07-01 | 2021-10-15 | 山东汉诺宝嘉新材料科技有限公司 | Novel heat-preservation and heat-insulation integrated gypsum wallboard and manufacturing method thereof |
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| CN108178590A (en) * | 2018-02-08 | 2018-06-19 | 灵猫（广州）新材料科技有限公司 | It is a kind of to polish the high performance cement base self leveling material with metal sense |
| CN113502976A (en) * | 2021-07-01 | 2021-10-15 | 山东汉诺宝嘉新材料科技有限公司 | Novel heat-preservation and heat-insulation integrated gypsum wallboard and manufacturing method thereof |
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Application publication date: 20151125 |