CN106699072A - Cement-based self-leveling mortar and preparation method thereof - Google Patents
Cement-based self-leveling mortar and preparation method thereof Download PDFInfo
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- CN106699072A CN106699072A CN201510771511.8A CN201510771511A CN106699072A CN 106699072 A CN106699072 A CN 106699072A CN 201510771511 A CN201510771511 A CN 201510771511A CN 106699072 A CN106699072 A CN 106699072A
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Abstract
The invention discloses cement-based self-leveling mortar and a preparation method thereof. The cement-based self-leveling mortar comprises the following raw materials: a powdery polycarboxylate water reducing agent, silicate cement, high-alumina cement, anhydrite, triple superphosphate, redispersible latex powder, a stabilizing agent, a defoaming agent, a retarder, a hardening accelerator and graduated quartz sand, wherein the powdery polycarboxylate water reducing agent has the brand of DD-801. The initial fluidity and the 20min fluidity of the cement-based self-leveling mortar are higher than 130mm, the 24h breaking strength is higher than 2MPa, the 24h compressive strength is higher than 6MPa, and all indexes meet requirements of national standards; in addition, compared with the conventional mortar, the cement-based self-leveling mortar provided by the invention has the advantages of low water-cement ratio, good self-leveling performance and self-compactness, high fluidity, high fluidity retentivity, low bubble rate, high strength and higher leveling performance and early strength.
Description
Technical field
Present invention relates particularly to a kind of cement-based self-leveling mortar its preparation method.
Background technology
Gravity flowing levelling mortar is risen in 20 century 70s, starts the beginning of the nineties at the end of the eighties to be sent out in China
Exhibition, gravity flowing levelling mortar is a kind of with inorganic coagulation material or organic cementing material as base-material, is mixed with certain
Gathering materials and filler for amount, adds appropriate feature additive, has mobility after mix or by auxiliary
Helping property is spread out and put on and can be used for the construction material of floor leveling.With mobility it is high, shrinkage factor is low, intensity is high,
Wearability is good, from slickness, rapid draing solidification, thickness of thin, be easy to construction the advantages of.Can be effective
Solve that the speed of application caused by traditional earth material plastering construction is slow, the cycle is long, dusting decortication easily occur
Etc. quality problems, requirements at the higher level of the people to the ground layer of novel building are met, be widely used in large-scale
On the ground of the large spaces such as supermarket, shopping center, top grade entertainment place, conference centre, parking lot.
In various gravity flowing levelling mortars, cement-based self-leveling mortar is very wide in building material field application
A kind of general gravity flowing levelling mortar, because it is widely applied, the focus as this area technical study, but together
When there is also many research difficulty.The preparation technology key point of cement-based self-leveling mortar is also simultaneously difficult point
It is：On the basis of the relatively low water-cement ratio of proof strength, also to ensure that it has good mobility,
And on the premise of fluidity is good, to be also further ensured that gravity flowing levelling mortar shrinkage factor is low, cohesiveness
The good, performance such as intensity is high, wearability is good.In order to realize ensureing mobility under conditions of compared with low water-cement ratio,
People often select to add high efficiency water reducing agent in gravity flowing levelling mortar.And traditional naphthalene system, melamine series
There is the not high enough defect of water-reducing rate Deng high efficiency water reducing agent, while increase shrinkage factor, mobility can be brought to damage
Lose it is fast wait side effect, the problems such as cause relatively low gravity flowing levelling mortar fluidity or unreasonable setting time.
Therefore, develop a kind of low cost, good fluidity, mobility keep excellent performance, shrinkage factor it is low,
Cohesiveness is good, intensity is high, wearability is good, the cement-based self-leveling mortar of low water-cement ratio and high solidity is
This area technical problem urgently to be resolved hurrily.
The content of the invention
The technical problem to be solved in the present invention is to overcome cement-based self-leveling mortar in the prior art to subtract
Water rate is not high enough, shrinkage factor is too high, liquidity value added is fast, fluidity is relatively low, setting time is unreasonable,
High cost, there is the thickening defect such as side effect, and provide a kind of cement-based self-leveling mortar and its preparation side
Method.Cement-based self-leveling mortar initial flow degree of the invention and 20min fluidities are above 130mm,
24h rupture strengths are more than 2MPa, and 24h compression strength is more than 6MPa, are satisfied by national standard requirement；
And compared to traditional mortar, the cement-based self-leveling mortar ratio of mud of the invention is low, Self-leveling and self-compaction
Spend, good fluidity, fluidity retentivity it is high, bubble rate is low, intensity is high, and with higher levelling
Property and early strength.
The invention provides a kind of cement-based self-leveling mortar, its raw material includes 0.1~0.2% powdery polycarboxylic acid
Water reducer, 25%~30% portland cement, 3%~10% alumina cement, 2%~8% anhydrite, 10%~25%
Coarse whiting, 1%~4% redispersable latex powder, 0.04%~0.15% stabilizer, 0.05%~0.1% defoamer,
0~0.25% retarder, 0~0.2% early strength agent and 37.04%~44.4% grade match somebody with somebody quartz sand；Percentage is each group
Sub-prime amount accounts for the percentage of the raw material gross mass；The powdery polycarboxylic acid water reducer is for the trade mark
The powdery polycarboxylic acid water reducer of DD-801.
It is preferred that the trade mark that the powdery polycarboxylic acid water reducer is Shanghai Dongda Chemical Co., Ltd.'s production is
The powdery polycarboxylic acid water reducer of DD-801.
In the present invention, the component of the powdery polycarboxylic acid water reducer is free of inorganic interleaving agent.
The portland cement can be the conventional portland cement in this area.
It is preferred that the portland cement is the model of Shanghai Wan An Hua Xin Cement Co., Ltds production
One kind or many in the portland cement of PO42.5, PO42.5R, PO52.5 and PO52.5R
Kind.
It is preferred that the portland cement is not less than 42.5 portland cement for strength mark.
The alumina cement can be the conventional alumina cement in this area.It is preferred that the alumina cement is triumphant
The alumina cement of the model Ternal CC of Northey (China) aluminate Technology Co., Ltd. production.
The anhydrite can be the conventional anhydrite in this area.It is preferred that the anhydrite is extraordinary Nanjing
The anhydrite of building materials limited company production.
In the present invention, the coarse whiting, also referred to as calcite in powder are the abbreviations of powdered whiting, usually
Ground by natural carbonate mineral such as calcite, marble, lime stone and formed.It is described heavy in the present invention
Calcium can be the conventional coarse whiting in this area.It is preferred that the mesh number of the coarse whiting is 300-400 mesh.
It is preferred that the coarse whiting is the coarse whiting of Jiangxi Ao Te fine powders Co., Ltd production.
The redispersable latex powder can be the conventional redispersable latex powder in this area.It is preferred that described
Redispersable latex powder is can dividing again for the model 5010N of wacker chemicals (China) Co., Ltd production
Dissipate latex powder.
The stabilizer can be the conventional stabilizer in this area.It is preferred that the stabilizer is viscosity≤400
Hydroxypropyl level methyl cellulose ether and/or viscosity≤400 ethoxyl methyl cellulose ether.It is preferred that institute
It is the stabilization of the model MHPC400PF of Hercules Tian Pu Chemical Co., Ltd.s production to state stabilizer
Agent.
The defoamer can be the conventional defoamer in this area.It is preferred that the defoamer is Ya Shilan collection
The defoamer of the model Re2971 of group's production.
The retarder can be the conventional retarder in this area.It is preferred that the retarder is natural winestone
One or more in acid, sodium gluconate, sodium citrate and borax.It is preferred that the retarder is
The retarder of Chang Mao Biochemical Engineering Co's production.
The early strength agent can be the conventional early strength agent in this area.It is preferred that the early strength agent be lithium carbonate,
One or more in sodium carbonate and lithium chloride.It is preferred that the early strength agent is Lang Sheng Chemical Co., Ltd.s
The early strength agent of production.
The level can be that the conventional level in this area matches somebody with somebody quartz sand with quartz sand.It is preferred that the level is with quartz
Sand is that 70~140 mesh level matches somebody with somebody quartz sand.It is preferred that described for Shanghai is built up to Science and Technology Ltd.'s production
Level matches somebody with somebody quartz sand.
It is preferred that the consumption of the powdery polycarboxylic acid water reducer is 0.1%~0.2%；More preferably it is
0.12%~0.18%, such as 0.15%.
It is preferred that the consumption of the portland cement is 25%~30%；More preferably it is 26%~29%, example
Such as 27.5%.
It is preferred that the consumption of the alumina cement is 3%~10%；More preferably it is 5%~8%, such as 6.5%.
It is preferred that the consumption of the anhydrite is 2%~8%；More preferably it is 4%~6%, such as 5%.
It is preferred that the consumption of the coarse whiting is 10%~25%；More preferably it is 15%~20%, such as 17.5%.
It is preferred that consumption of the level with quartz sand is 37.04%~44.4%；More preferably it is
38.47%~41.955%, such as 40.41%.
It is preferred that the consumption of the redispersable latex powder is 1%~4%；More preferably it is 2%~3%, example
Such as 2.5%.
It is preferred that the consumption of the retarder is 0~0.25%；More preferably it is 0.05%~0.2%, for example
0.125%.
It is preferred that the consumption of the early strength agent is 0~0.2%；More preferably it is 0.05~0.15%, such as 0.1%.
It is preferred that the consumption of the stabilizer is 0.04%~0.15%；More preferably it is 0.08%~0.11%,
Such as 0.095%.
It is preferred that the consumption of the defoamer is 0.05%~0.1%；More preferably it is 0.06%~0.09%,
Such as 0.075%.
It is preferred that the raw material of the cement-based self-leveling mortar is made up of following each component：0.1~0.2%
The powdery polycarboxylic acid water reducer, 25%~30% portland cement, 3%~10% alumina cement, 2%~8%
Anhydrite, 10%~25% coarse whiting, 1%~4% redispersable latex powder, 0.04%~0.15% stabilizer,
0.05%~0.1% defoamer, 0~0.25% retarder, 0~0.2% early strength agent and 37.04%~44.4% grade are matched somebody with somebody
Quartz sand；Percentage is the percentage that each component quality accounts for the raw material gross mass.
It is preferred that the raw material of the cement-based self-leveling mortar is comprising following each component or by following each component
Constituted：Powdery polycarboxylic acid water reducer, 26%~29% portland cement, 5%~8% described in 0.12%~0.18%
Alumina cement, 4%~6% anhydrite, 15%~20% coarse whiting, 2%~3% redispersable latex powder,
0.08%~0.11% stabilizer, 0.06%~0.09% defoamer, 0.05%~0.2% retarder, 0.05~0.15%
Early strength agent and 38.47%~41.955% grade match somebody with somebody quartz sand；Percentage is total for each component quality accounts for the raw material
The percentage of quality.
Present invention also offers a kind of preparation method of the cement-based self-leveling mortar, it includes following step
Suddenly：The each component of the raw material is well mixed.
It is preferred that the well mixed method using stirring is mixed.
Without prejudice to the field on the basis of common sense, above-mentioned each optimum condition, can be combined, and obtain final product this
Invent each preferred embodiments.
Agents useful for same of the present invention and raw material are commercially available.
Positive effect of the invention is：
1st, cement-based self-leveling mortar initial flow degree of the invention and 20min fluidities are above
130mm, 24h rupture strength are more than 2MPa, and 24h compression strength is more than 6MPa, is satisfied by national mark
Alignment request.Compared to traditional mortar, cement-based self-leveling mortar good fluidity of the invention, fluidity are protected
Holding property is high, and bubble rate is low, intensity is high, and with levelling property higher and early strength.
2nd, the cement-based self-leveling mortar ratio of mud of the invention is low, Self-leveling and self-compaction degree are good.
Specific embodiment
The present invention is further illustrated below by the mode of embodiment, but is not therefore limited the present invention to
Among described scope of embodiments.The experimental technique of unreceipted actual conditions in the following example, according to normal
Rule method and condition, or selected according to catalogue.
Raw material sources in following examples：
Portland cement manufacturer：Shanghai Wan An Hua Xin Cement Co., Ltds, product type is
PO42.5, PO42.5R, PO52.5 or PO52.5R.
Alumina cement manufacturer：Triumphant Northey (China) aluminate Technology Co., Ltd., product type is Ternal
CC。
Anhydrite manufacturer：Nanjing special type building materials limited company.
GCC production business：Jiangxi Ao Te fine powders Co., Ltd.
Water reducer manufacturer in embodiment 1~5：Shanghai Dongda Chemical Co., Ltd., product grade DD-801.
Water reducer manufacturer in comparative example 1：Shanghai Sanrui Chemistry Co., Ltd, product grade SD-600P-L.
Defoamer manufacturer：Ya Shilan groups, product type Re2971.
Retarder manufacturer：Chang Mao Biochemical Engineering Co, specific species can be natural wine
Stone acid, sodium gluconate, sodium citrate or boric acid.
Stabilizer manufacturer：Hercules Tian Pu Chemical Co., Ltd.s, product type MHPC400PF.
Redispersable latex powder manufacturer：Wacker chemicals (China) Co., Ltd, product type 5010N.
Early strength agent manufacturer：Lang Sheng Chemical Co., Ltd.s, specific species can be lithium carbonate, sodium carbonate or chlorine
Change lithium.
Level matches somebody with somebody quartz sand：Shanghai is built up to Science and Technology Ltd., and 70-140 mesh level is matched somebody with somebody.
In the present invention, the model is commonly referred to as the trade mark, different according to the definition difference of manufacturer.
Embodiment 1~5
Table 1
Choose above-mentioned raw materials weighing, dispensing, stirring mixing, quality inspection, you can obtain institute in the present invention
The cement-based self-leveling mortar stated.("/" represents this without that is, addition is for 0) in table 1
Effect example
The method for testing and detecting of gravity flowing levelling mortar is：The water of 21-24% is added in gravity flowing levelling mortar, i.e.,
The water of 21-24kg is added in per 100kg gravity flowing levelling mortars, according to JC/T 985-2005《Ground cement
Based self-leveling mortar》Specified in standard test method requirement, measure obtain corresponding technical indicator result,
It is as shown in table 2 below：
Table 2
Claims (9)
1. a kind of cement-based self-leveling mortar, it is characterised in that its raw material is poly- including 0.1~0.2% powdery
Carboxylic acid water reducer, 25%~30% portland cement, 3%~10% alumina cement, 2%~8% anhydrite,
10%~25% coarse whiting, 1%~4% redispersable latex powder, 0.04%~0.15% stabilizer, 0.05%~0.1%
Defoamer, 0~0.25% retarder, 0~0.2% early strength agent and 37.04%~44.4% grade match somebody with somebody quartz sand；Percentage
Than the percentage that the raw material gross mass is accounted for for each component quality；The powdery polycarboxylic acid water reducer is the trade mark
It is the powdery polycarboxylic acid water reducer of DD-801.
2. cement-based self-leveling mortar as claimed in claim 1, it is characterised in that：
The portland cement is not less than 42.5 portland cement for strength mark；
And/or, the mesh number of the coarse whiting is 300-400 mesh；
And/or, the stabilizer is the hydroxypropyl level methyl cellulose ether of viscosity≤400 and/or viscosity≤400
Ethoxyl methyl cellulose ether；
And/or, the retarder is in Threaric acid, sodium gluconate, sodium citrate and borax
Plant or various；
And/or, the early strength agent is one or more in lithium carbonate, sodium carbonate and lithium chloride；
And/or, the level is that 70~140 mesh level matches somebody with somebody quartz sand with quartz sand.
3. cement-based self-leveling mortar as claimed in claim 1 or 2, it is characterised in that：
The portland cement is model PO42.5, PO42.5R, PO52.5 and PO52.5R
Portland cement in one or more；
And/or, the alumina cement is the alumina cement of model Ternal CC；
And/or, the redispersable latex powder is the redispersable latex powder of model 5010N；
And/or, the stabilizer is the stabilizer of model MHPC400PF；
And/or, the defoamer is the defoamer of model Re2971.
4. cement-based self-leveling mortar as claimed in claim 1, it is characterised in that：
The consumption of the powdery polycarboxylic acid water reducer is 0.12%~0.18%；
And/or, the consumption of the portland cement is 26%~29%；
And/or, the consumption of the alumina cement is 5%~8%；
And/or, the consumption of the anhydrite is 4%~6%；
And/or, the consumption of the coarse whiting is 15%~20%；
And/or, consumption of the level with quartz sand is 38.47%~41.955%；
And/or, the consumption of the redispersable latex powder is 2%~3%；
And/or, the consumption of the retarder is 0.05%~0.2%；
And/or, the consumption of the early strength agent is 0.05~0.15%；
And/or, the consumption of the stabilizer is 0.08%~0.11%；
And/or, the consumption of the defoamer is 0.06%~0.09%.
5. cement-based self-leveling mortar as claimed in claim 4, it is characterised in that：
The consumption of the powdery polycarboxylic acid water reducer is 0.15%；
And/or, the consumption of the portland cement is 27.5%；
And/or, the consumption of the alumina cement is 6.5%；
And/or, the consumption of the anhydrite is 5%；
And/or, the consumption of the coarse whiting is 17.5%；
And/or, consumption of the level with quartz sand is 40.41%；
And/or, the consumption of the redispersable latex powder is 2.5%；
And/or, the consumption of the retarder is 0.125%；
And/or, the consumption of the early strength agent is 0.1%；
And/or, the consumption of the stabilizer is 0.095%；
And/or, the consumption of the defoamer is 0.075%.
6. cement-based self-leveling mortar as claimed in claim 1 or 2, it is characterised in that：
The raw material of the cement-based self-leveling mortar is made up of following each component：Powdery described in 0.1~0.2%
Polycarboxylate water-reducer, 25%~30% portland cement, 3%~10% alumina cement, 2%~8% anhydrite,
10%~25% coarse whiting, 1%~4% redispersable latex powder, 0.04%~0.15% stabilizer, 0.05%~0.1%
Defoamer, 0~0.25% retarder, 0~0.2% early strength agent and 37.04%~44.4% grade match somebody with somebody quartz sand；Percentage
Than the percentage that the raw material gross mass is accounted for for each component quality.
7. cement-based self-leveling mortar as claimed in claim 1 or 2, it is characterised in that：
The raw material of the cement-based self-leveling mortar is made up of following each component：Described in 0.12%~0.18%
Powdery polycarboxylic acid water reducer, 26%~29% portland cement, 5%~8% alumina cement, 4%~6% admant
Cream, 15%~20% coarse whiting, 2%~3% redispersable latex powder, 0.08%~0.11% stabilizer,
0.06%~0.09% defoamer, 0.05%~0.2% retarder, 0.05~0.15% early strength agent and
38.47%~41.955% grade is matched somebody with somebody quartz sand；Percentage is the percentage that each component quality accounts for the raw material gross mass
Than.
8. a kind of preparation method of the cement-based self-leveling mortar as any one of claim 1~7,
Characterized in that, it comprises the following steps：The each component of the raw material is well mixed.
9. preparation method as claimed in claim 8, it is characterised in that described well mixed using stirring
The method mixed is mixed.
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| CN107324746A (en) * | 2017-07-19 | 2017-11-07 | 刘少伟 | A kind of new gravity flowing levelling mortar and its production technology |
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| CN110590281A (en) * | 2019-09-25 | 2019-12-20 | 湖州乌米科技有限公司 | Concrete suitable for underground engineering |
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| CN112159161A (en) * | 2020-09-16 | 2021-01-01 | 贵州正和天筑科技有限公司 | Ground cement-based semi-self-leveling mortar and preparation method thereof |
| CN112266222A (en) * | 2020-10-27 | 2021-01-26 | 安徽皖维花山新材料有限责任公司 | Cushion layer self-leveling rubber powder premix and cushion layer self-leveling mortar based on same |
| CN112456951A (en) * | 2020-11-18 | 2021-03-09 | 上海卫吉节能科技有限公司 | Cement-based self-leveling cushion mortar and preparation method thereof |
| CN113185255A (en) * | 2021-05-19 | 2021-07-30 | 上海三棵树防水技术有限公司 | Special cement-based self-leveling mortar for indoor floor heating and preparation method thereof |
| CN113387662A (en) * | 2021-05-24 | 2021-09-14 | 苏州金世晟建筑装饰工程有限公司 | Novel gypsum surface layer self-leveling material |
| CN116283082A (en) * | 2023-02-16 | 2023-06-23 | 中交四航工程研究院有限公司 | Self-leveling mortar and preparation method and application thereof |
| CN116462473A (en) * | 2023-05-25 | 2023-07-21 | 北京建工新型建材有限责任公司 | Full-machine-made sand waterproof cement-based self-leveling mortar and preparation method thereof |
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Application publication date: 20170524 |