CN112125601A - Low-cost cement self-leveling mortar, preparation method and application method thereof - Google Patents
Low-cost cement self-leveling mortar, preparation method and application method thereof Download PDFInfo
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- CN112125601A CN112125601A CN202010919296.2A CN202010919296A CN112125601A CN 112125601 A CN112125601 A CN 112125601A CN 202010919296 A CN202010919296 A CN 202010919296A CN 112125601 A CN112125601 A CN 112125601A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/025—Belite cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention discloses a low-cost cement self-leveling mortar, a preparation method and an application method thereof, wherein the low-cost cement self-leveling mortar comprises the following raw material components in parts by weight: 30-35 parts of cement, 20-25 parts of heavy calcium carbonate, 48-52 parts of quartz sand, 0.2-0.25 part of polycarboxylic acid water reducing agent, 0.1-0.15 part of defoaming agent, 0.08-0.12 part of expanding agent, 0.1-0.12 part of cellulose, 0.8-1.2 parts of rubber powder and 1-1.5 parts of calcium formate, wherein the polycarboxylic acid water reducing agent, the defoaming agent, the expanding agent, the cellulose, the rubber powder and the calcium formate are sequentially added into a mixer to be mixed and stirred for 5min, the mixture is conveyed into a stirrer, the cement, the heavy calcium carbonate and the quartz sand are added and stirred and mixed for 5min, the self-leveling mortar is obtained after the mixing is finished, and the prepared self-leveling mortar is added with water during construction and is uniformly stirred and used. According to the invention, by adjusting the formula structure, the construction process is simple and convenient to operate, the construction can be carried out after the base surface is wetted by water, the ternary system is optimized into the unitary system, the production efficiency is improved, the cost is saved, and the mortar has good fluidity and high construction efficiency when being poured on the original concrete ground.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to low-cost cement self-leveling mortar, a preparation method and an application method thereof.
Background
The self-leveling mortar comprises cement-based self-leveling mortar, leveling mortar and the like, and is a product with high technological content and relatively complex technical links. The high-leveling-rate dry-mixed powder material is a dry-mixed powder material consisting of a plurality of active ingredients, can be used after being mixed with water on site, can obtain a high-leveling base surface after being spread by a scraper, has high hardening speed, can walk on the base surface within 24 hours or can be used for subsequent engineering (such as wood floor laying, diamond plate laying and the like), and has quick and simple construction which is incomparable with the traditional manual leveling.
With the demand of market development, self-leveling cement mortar is a trend and is rapidly popularized. The existing self-leveling mortar mostly takes a thin layer as a main material, the cost of the formula material is high, the material is complicated and complicated, construction nodes are more, an interface is required to be bottomed and sealed, the mortar is easy to crack under the environment with large outdoor sun-drying wind speed, the mortar is easy to crack after construction exceeding 5MM, ternary system quick-hardening sulphoaluminate cement and building gypsum are mostly used for improving early strength and compensating shrinkage, however, due to the fact that the construction operation time is not enough, retarders such as tartaric acid and sodium gluconate are added for prolonging the operation time, meanwhile, the mortar strength is influenced, lithium carbonate and calcium formate have to be added for improving early strength and strength, the structure cycle is complex, the process is complicated, and the cost is high.
Disclosure of Invention
The invention aims to provide low-cost cement self-leveling mortar, a preparation method and an application method thereof.
The technical scheme of the invention is realized as follows:
the low-cost cement self-leveling mortar comprises the following raw material components in parts by weight: 30-35 parts of cement, 20-25 parts of heavy calcium carbonate, 48-52 parts of quartz sand, 0.2-0.25 part of polycarboxylic acid water reducing agent, 0.1-0.15 part of defoaming agent, 0.08-0.12 part of expanding agent, 0.1-0.12 part of cellulose, 0.8-1.2 parts of rubber powder and 1-1.5 parts of calcium formate.
The further technical proposal is that the cement is ordinary portland cement or high belite cement.
The further technical proposal is that the size of the heavy calcium carbonate is 400 meshes.
The further technical scheme is that the size of the quartz sand is 50-140 meshes.
The further technical scheme is that the water reducing rate of the polycarboxylate superplasticizer is 25-30%.
The further technical scheme is that the cellulose is 400-viscosity cellulose.
A preparation method of low-cost cement self-leveling mortar comprises the steps of sequentially adding a polycarboxylic acid water reducing agent, a defoaming agent, an expanding agent, cellulose, rubber powder and calcium formate into a mixer, mixing and stirring for 5min, conveying the mixture into a stirrer, adding cement, coarse whiting and quartz sand, stirring and mixing for 5min, and packaging after mixing to obtain the self-leveling mortar.
An application method of low-cost self-leveling cement mortar is characterized in that water is added into the prepared self-leveling cement mortar during construction, and the self-leveling cement mortar is uniformly stirred for use.
The further technical scheme is that the proportion of the water is 24.8%.
The invention has the beneficial effects that:
according to the invention, by adjusting the formula structure, the construction process is simple and convenient to operate, the construction can be carried out after the base surface is wetted by water, the ternary system is optimized into the unitary system, the production efficiency is improved, the cost is saved, when the raw materials such as quick-hardening sulpho-aluminium cement, building gypsum and the like are not added, the dimensional change rate in the middle and later stages is within-0.1 to +0.10 specified by the standard, and the mortar has good fluidity and high construction efficiency when being poured on the original concrete ground.
Drawings
FIG. 1 shows the mortar performance index parameters of example 1 of the present invention;
FIG. 2 shows the mortar performance index parameters of example 2 of the present invention;
FIG. 3 shows the mortar performance index parameters of example 3 of the present invention;
FIG. 4 shows the mortar performance index parameters of example 4 of the present invention.
Detailed Description
In order to better understand the technical content of the invention, specific embodiments are provided below, and the invention is further described with reference to the accompanying drawings.
Example 1
The low-cost cement self-leveling mortar comprises the following raw material components in parts by weight: 30 parts of ordinary portland cement, 20 parts of 400-mesh heavy calcium, 52 parts of 50-140-mesh quartz sand, 0.2 part of polycarboxylic acid water reducing agent with the water reducing rate of 25% -30%, 0.1 part of defoaming agent, 0.08 part of expanding agent, 0.1 part of 400-viscosity cellulose, 0.8 part of rubber powder and 1 part of calcium formate.
A preparation method of low-cost cement self-leveling mortar comprises the steps of sequentially adding 0.2 part of polycarboxylic acid water reducing agent with a water reducing rate of 25% -30%, 0.1 part of defoaming agent, 0.08 part of expanding agent, 0.1 part of 400-viscosity cellulose, 0.8 part of rubber powder and 1 part of calcium formate into a mixer, mixing and stirring for 5min, conveying the mixture into a stirrer, adding 30 parts of ordinary portland cement, 20 parts of 400-mesh heavy calcium and 52 parts of 50-140-mesh quartz sand, stirring and mixing for 5min, and packaging after mixing is finished to obtain the self-leveling mortar.
An application method of low-cost cement self-leveling mortar is characterized by adding 24.8% of water during construction and uniformly stirring for use.
And (3) performance testing: testing the flowing test mold on horizontal glass, wherein the initial fluidity is 143mm, the fluidity of the mortar is 140mm after standing in a stirring pot for 20min, and the physical performance compressive strength generated after the mortar is made into test blocks and cured for 28 days is as follows: 21.5MPa, the constructability meets the construction requirement, and the specific physical properties of the mortar are shown in figure 1:
example 2
The low-cost cement self-leveling mortar comprises the following raw material components in parts by weight: 32 parts of ordinary portland cement, 21 parts of 400-mesh heavy calcium, 50 parts of 50-140-mesh quartz sand, 0.21 part of polycarboxylic acid water reducing agent with the water reducing rate of 25% -30%, 0.11 part of defoaming agent, 0.09 part of expanding agent, 0.11 part of 400-viscosity cellulose, 0.95 part of rubber powder and 1.1 part of calcium formate.
A preparation method of low-cost cement self-leveling mortar comprises the steps of sequentially adding 0.21 part of polycarboxylic acid water reducing agent with a water reducing rate of 25% -30%, 0.11 part of defoaming agent, 0.09 part of expanding agent, 0.11 part of 400-viscosity cellulose, 0.95 part of rubber powder and 1.1 part of calcium formate into a mixer, mixing and stirring for 5min, conveying into a stirrer, adding 32 parts of ordinary portland cement, 21 parts of 400-mesh heavy calcium and 50 parts of 50-140-mesh quartz sand, stirring and mixing for 5min, and packaging after mixing is finished to obtain the self-leveling mortar.
An application method of low-cost cement self-leveling mortar is characterized by adding 24.8% of water during construction and uniformly stirring for use.
And (3) performance testing: testing the flowing test mold on horizontal glass, wherein the initial fluidity is 146mm, the fluidity of the mortar is tested to be 144mm after the mortar is kept still in a stirring pot for 20min, and the physical performance compressive strength generated after the mortar is made into test blocks and cured for 28 days is as follows: 22.8MPa, the constructability meets the construction requirement, and the specific physical properties of the mortar are shown in figure 2:
example 3
The low-cost cement self-leveling mortar comprises the following raw material components in parts by weight: 34 parts of ordinary portland cement, 23 parts of 400-mesh heavy calcium, 49 parts of 50-140-mesh quartz sand, 0.23 part of polycarboxylic acid water reducing agent with the water reducing rate of 25% -30%, 0.12 part of defoaming agent, 0.1 part of expanding agent, 0.12 part of 400-viscosity cellulose, 1.2 parts of rubber powder and 1.3 parts of calcium formate.
A preparation method of low-cost cement self-leveling mortar comprises the steps of sequentially adding 0.23 part of polycarboxylic acid water reducing agent with a water reducing rate of 25% -30%, 0.12 part of defoaming agent, 0.1 part of expanding agent, 0.12 part of 400-viscosity cellulose, 1.2 parts of rubber powder and 1.3 parts of calcium formate into a mixer, mixing and stirring for 5min, conveying the mixture into a stirrer, adding 34 parts of ordinary portland cement, 23 parts of 400-mesh heavy calcium and 49 parts of 50-140-mesh quartz sand, stirring and mixing for 5min, and packaging after mixing is finished to obtain the self-leveling mortar.
An application method of low-cost cement self-leveling mortar is characterized by adding 24.8% of water during construction and uniformly stirring for use.
And (3) performance testing: testing the flowing test mold on horizontal glass, wherein the initial fluidity is 148mm, the fluidity of the mortar is tested to be 146mm after the mortar is kept still in a stirring pot for 20min, and the physical performance compressive strength generated after the mortar is made into test blocks and cured for 28 days is as follows: 24.15MPa, the constructability meets the construction requirement, and the specific physical properties of the mortar are shown in figure 3:
example 4
The low-cost cement self-leveling mortar comprises the following raw material components in parts by weight: 35 parts of ordinary portland cement, 25 parts of 400-mesh heavy calcium, 48 parts of 50-140-mesh quartz sand, 0.25 part of polycarboxylic acid water reducing agent with water reducing rate of 25% -30%, 0.12 part of defoaming agent, 0.12 part of expanding agent, 0.12 part of 400-viscosity cellulose, 1.2 parts of rubber powder and 1.5 parts of calcium formate.
A preparation method of low-cost cement self-leveling mortar comprises the steps of sequentially adding 0.25 part of polycarboxylic acid water reducing agent with a water reducing rate of 25% -30%, 0.12 part of defoaming agent, 0.12 part of expanding agent, 0.12 part of 400-viscosity cellulose, 1.2 parts of rubber powder and 1.5 parts of calcium formate into a mixer, mixing and stirring for 5min, conveying into a stirrer, adding 35 parts of ordinary portland cement, 25 parts of 400-mesh heavy calcium and 48 parts of 50-140-mesh quartz sand, stirring and mixing for 5min, and packaging after mixing is finished to obtain the self-leveling mortar.
An application method of low-cost cement self-leveling mortar is characterized by adding 24.8% of water during construction and uniformly stirring for use.
And (3) performance testing: testing the flowing test mold on horizontal glass, wherein the initial fluidity is 150mm, the fluidity of the mortar is tested to be 148mm after the mortar is kept still in a stirring pot for 20min, and the physical performance compressive strength generated after the mortar is made into test blocks and maintained for 28 days is as follows: 25.3MPa, the constructability meets the construction requirement, and the specific physical properties of the mortar are shown in figure 4:
according to the performance measurement results of the examples 1, 2, 3 and 4, the self-leveling mortar has the advantages that the self-leveling mortar meets the standard strength of the self-leveling mortar, the dimensional change rate of the middle and later stages is within-0.1 to +0.10 specified by the standard when the raw materials such as quick-hardening sulphoaluminate cement, building gypsum and the like are not added, the mortar has good fluidity when being poured on the original concrete floor, no bleeding and no segregation are generated in the preparation process, the surface effect is good, the cost is low, and the economic benefit is achieved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The low-cost cement self-leveling mortar is characterized by comprising the following raw material components in parts by weight: 30-35 parts of cement, 20-25 parts of heavy calcium carbonate, 48-52 parts of quartz sand, 0.2-0.25 part of polycarboxylic acid water reducing agent, 0.1-0.15 part of defoaming agent, 0.08-0.12 part of expanding agent, 0.1-0.12 part of cellulose, 0.8-1.2 parts of rubber powder and 1-1.5 parts of calcium formate.
2. A low cost cementitious self-leveling mortar as recited in claim 1 wherein said cement is portland cement or high belite cement.
3. A low cost cementitious self-leveling mortar as recited in claim 1 wherein the heavy calcium carbonate is 400 mesh in size.
4. The low cost cementitious self-leveling mortar of claim 1 wherein the quartz sand is 50-140 mesh in size.
5. The low-cost cement self-leveling mortar according to claim 1, wherein the water reducing rate of the polycarboxylate superplasticizer is 25% -30%.
6. A low cost cementitious self-leveling mortar as recited in claim 1 wherein said cellulose is 400 viscosity cellulose.
7. The preparation method of the low-cost cement self-leveling mortar of claim 1 is characterized by sequentially adding a polycarboxylic acid water reducing agent, a defoaming agent, an expanding agent, cellulose, rubber powder and calcium formate into a mixer, mixing and stirring for 5min, conveying the mixture into a stirrer, adding cement, coarse whiting and quartz sand, stirring and mixing for 5min, and packaging the mixture after the mixing is finished to obtain the self-leveling mortar.
8. The method for applying the low-cost cement self-leveling mortar according to the claims 1 to 7, wherein the prepared self-leveling mortar is added with water during construction and is uniformly stirred for use.
9. The method of claim 8, wherein the water is present at 24.8%.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007031244A (en) * | 2005-07-29 | 2007-02-08 | Ube Ind Ltd | Self-leveling hydraulic composition |
| CN102126848A (en) * | 2011-02-10 | 2011-07-20 | 乌鲁木齐市建筑建材科学研究院有限责任公司 | Cement-based self-leveling dry powder mortar for high-cracking-resistance ground |
| EP2808312A1 (en) * | 2013-05-23 | 2014-12-03 | Shin-Etsu Chemical Co., Ltd. | Self-leveling composition |
| CN104496320A (en) * | 2014-12-18 | 2015-04-08 | 南京工业大学 | Cement-based self-leveling mortar and preparation method thereof |
| KR20160065490A (en) * | 2014-12-01 | 2016-06-09 | 한일시멘트 (주) | Quick-drying type self-leveling mortar composition |
| CN106587809A (en) * | 2016-11-30 | 2017-04-26 | 浙江理工大学 | Preparing method for surface course self-leveling cement |
-
2020
- 2020-11-11 CN CN202010919296.2A patent/CN112125601A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007031244A (en) * | 2005-07-29 | 2007-02-08 | Ube Ind Ltd | Self-leveling hydraulic composition |
| CN102126848A (en) * | 2011-02-10 | 2011-07-20 | 乌鲁木齐市建筑建材科学研究院有限责任公司 | Cement-based self-leveling dry powder mortar for high-cracking-resistance ground |
| EP2808312A1 (en) * | 2013-05-23 | 2014-12-03 | Shin-Etsu Chemical Co., Ltd. | Self-leveling composition |
| KR20160065490A (en) * | 2014-12-01 | 2016-06-09 | 한일시멘트 (주) | Quick-drying type self-leveling mortar composition |
| CN104496320A (en) * | 2014-12-18 | 2015-04-08 | 南京工业大学 | Cement-based self-leveling mortar and preparation method thereof |
| CN106587809A (en) * | 2016-11-30 | 2017-04-26 | 浙江理工大学 | Preparing method for surface course self-leveling cement |
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