CN116041018A - Light cement-based leveling mortar material and preparation method thereof - Google Patents

Light cement-based leveling mortar material and preparation method thereof Download PDF

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Publication number
CN116041018A
CN116041018A CN202211699857.8A CN202211699857A CN116041018A CN 116041018 A CN116041018 A CN 116041018A CN 202211699857 A CN202211699857 A CN 202211699857A CN 116041018 A CN116041018 A CN 116041018A
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China
Prior art keywords
cement
leveling mortar
mortar material
parts
based leveling
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CN202211699857.8A
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Chinese (zh)
Inventor
张小民
熊俊杰
赖洪江
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Foshan City South Sea Bang Dun Ornament Materials Co ltd
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Foshan City South Sea Bang Dun Ornament Materials Co ltd
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Priority to CN202211699857.8A priority Critical patent/CN116041018A/en
Publication of CN116041018A publication Critical patent/CN116041018A/en
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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
    • C04B28/06—Aluminous cements
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/40—Porous or lightweight materials
    • 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
    • C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
    • 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
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

A light cement-based leveling mortar material and a preparation method thereof relate to the technical field of building materials and comprise the following components in parts by mass: 33-44 parts of cement, 8-10 parts of expanded and vitrified microbeads, 40-55 parts of filler, 4-5 parts of expanding agent, 0.1-0.3 part of water reducing agent, 0.05-0.1 part of defoaming agent, 0.05-0.1 part of cellulose ether and 0.05-0.1 part of retarder. The leveling mortar material adopts cement as a main cementing material, and has more excellent water resistance compared with gypsum-based self-leveling materials; meanwhile, the lightweight cement-based leveling mortar material is added with the expanded and vitrified microbeads and optimizes the cooperation of the components, so that the material density can be effectively reduced, the coating rate can be improved, the cost can be reduced, the leveling precision can be improved, the construction is convenient and fast, the construction period is short, the load of a building structure can be effectively reduced, and the lightweight cement-based leveling mortar material has the functional effects of sound insulation and heat preservation to a certain extent.

Description

Light cement-based leveling mortar material and preparation method thereof
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a light cement-based leveling mortar material and a preparation method thereof.
Background
In the field of terrace leveling, a lot of well-known ground leveling materials are used, besides fine stone concrete pouring and traditional cement mortar leveling, novel materials such as plastering mortar, gypsum-based self-leveling mortar, cement-based self-leveling mortar and the like are used, and the cement-based self-leveling mortar material has the characteristics of high fluidity, long initial setting time, proper final setting time, higher early and later strength, high binding force with a substrate and the like, and is widely applied to leveling of a fine-packed house at present. However, the cement-based self-leveling mortar cannot effectively reduce the structural load due to the conditions of high density of the material, high consumption and the like, and can increase the building weight.
The traditional cement mortar leveling, the on-site cement and sand mixing of workers are performed, the construction difficulty is high, the maintenance period is long, the flatness is low, and quality problems such as insufficient strength, powder on the surface, cracking, hollowing and the like can be frequently caused by improper batching or excessive water adding and improper maintenance of on-site workers.
The gypsum-based self-leveling material mortar also has high fluidity and leveling accuracy. The material is relatively cheap, but the gypsum-based self-leveling mortar has poor water resistance and low strength due to the self-material property, and the formed surface is only suitable for paving block floors and is not suitable for spreading glue, paving ceramic tiles and the like. And the gypsum-based self-leveling quality in the current market is uneven, a large amount of gypsum-based self-leveling agent is directly used in on-site batching without refining processing, and quality problems are frequent, such as non-drying mortar, no strength or poor strength after drying, cracking hollows and the like. While the current real estate enterprises such as the myriad, the bikini, the Royal and the Zhonghai use a large amount of these novel materials, they also want to reduce the material cost and ensure the stability of the quality. Therefore, a novel material needs to be researched, and the problems of high self-leveling density, high consumption and high comprehensive cost of the existing cement-based thick layer are solved while the performance is ensured.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the invention is to provide a light cement-based leveling mortar material which has the characteristics of excellent water resistance, small density, light weight, high cost performance, and the like, and has the effects of sound insulation, heat preservation and the like while effectively reducing the structural load.
The second purpose of the invention is to provide a preparation method of the light cement-based leveling mortar material, which has simple preparation process and stable quality of the finished product.
One of the purposes of the invention is realized by adopting the following technical scheme:
a light cement-based leveling mortar material comprises the following components in parts by mass:
33-44 parts of cement, 8-10 parts of expanded and vitrified microbeads, 40-55 parts of filler, 4-5 parts of expanding agent, 0.1-0.3 part of water reducing agent, 0.05-0.1 part of defoaming agent, 0.05-0.1 part of cellulose ether and 0.05-0.1 part of retarder.
Further, the cement comprises the following components in percentage by mass (25-32): silicate cement and sulphoaluminate cement of (8-12).
Further, the Portland cement is Portland cement PO42.5 and/or Portland cement PO42.5R; the sulphoaluminate cement is quick hardening sulphoaluminate cement R.SAC42.5 and/or low alkalinity sulphoaluminate cement R.SAC42.5.
Further, the filler comprises the following components in percentage by mass (35-45): the quartz sand of (5-10) and calcium carbonate, wherein the particle size of the quartz sand is 40-70 meshes, and the particle size of the calcium carbonate is 200-325 meshes.
Further, the expanding agent is anhydrous gypsum and/or semi-hydrated gypsum.
Further, the particle size of the expanded and vitrified micro bubbles is 70-90 meshes, and the volume weight is 110-130kg/m 3 。
Further, the compressive strength of the light cement-based leveling mortar material after molding for 1 day is more than or equal to 6.0MPa, the compressive strength for 28 days is more than or equal to 12.0MPa, the tensile bonding strength is more than or equal to 0.5MPa, and the dry density after molding is about 1200-1300kg/m 3 。
The second purpose of the invention is realized by adopting the following technical scheme:
a preparation method of a light cement-based leveling mortar material comprises the following steps:
s1, mixing and uniformly stirring cement, filler, a water reducing agent, a defoaming agent, cellulose ether and a retarder according to the formula amount to obtain a mixed material;
s2, adding the expanded and vitrified micro bubbles into the mixed material, stirring, and discharging to obtain the light cement-based leveling mortar material.
Further, in step S2, the stirring time is 1-2min.
Compared with the prior art, the invention has the beneficial effects that:
the light cement-based leveling mortar material adopts cement as a main cementing material, and has more excellent water resistance compared with a gypsum-based self-leveling material; meanwhile, the lightweight cement-based leveling mortar material is added with the expanded and vitrified microbeads and optimizes the cooperation of the components, so that the material density can be effectively reduced, the coating rate can be improved, the cost can be reduced, the leveling precision can be improved, the lightweight cement-based leveling mortar material has the characteristics of convenience in construction and short construction period, the load of a building structure can be effectively reduced, and the lightweight cement-based leveling mortar material has the functional effects of sound insulation and heat preservation.
The preparation method of the light cement-based leveling mortar material is simple in preparation process and stable in quality of finished products.
Detailed Description
The present invention will be further described with reference to the following specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.
The raw materials of the invention are all available from the market, the water reducer is purchased from PC-1030 of Xingbang chemical building materials, inc. of Suzhou, the defoamer is purchased from D-130 of Jiangsu Megao building materials science and technology, the cellulose ether is purchased from HPMC2 ten thousand of Shandong Heda group Co., ltd, and the retarder is purchased from tartaric acid of Shanghai Limited.
Example 1
A light cement-based leveling mortar material comprises the following components in parts by mass:
25 parts of silicate cement, 8 parts of sulphoaluminate cement, 8 parts of expanded and vitrified microbeads, 40 parts of quartz sand, 15 parts of calcium carbonate, 4 parts of an expanding agent, 0.1 part of a water reducing agent, 0.05 part of a defoaming agent, 0.05 part of cellulose ether and 0.05 part of a retarder.
Further, the Portland cement is ordinary Portland cement PO42.5; the sulphoaluminate cement is quick hardening sulphoaluminate cement R.SAC42.5.
Further, the expanding agent is semi-hydrated gypsum.
A preparation method of a light cement-based leveling mortar material comprises the following steps:
s1, mixing cement, filler, water reducer, defoamer, cellulose ether and retarder according to the formula amount in a horizontal mixer, and uniformly stirring to obtain a mixed material;
s2, adding the expanded and vitrified micro bubbles into the mixed material, stirring for 1-2min, discharging, inspecting and packaging to obtain the light cement-based leveling mortar material.
Example 2
A light cement-based leveling mortar material comprises the following components in parts by mass:
28 parts of silicate cement, 10 parts of sulphoaluminate cement, 9 parts of expanded and vitrified microbeads, 38 parts of quartz sand, 10 parts of calcium carbonate, 5 parts of an expanding agent, 0.2 part of a water reducing agent, 0.07 part of a defoaming agent, 0.08 part of cellulose ether and 0.07 part of a retarder.
Further, the Portland cement is ordinary Portland cement PO42.5R; the sulphoaluminate cement is low-alkalinity sulphoaluminate cement R.SAC42.5.
Further, the expanding agent is anhydrous gypsum.
A preparation method of a light cement-based leveling mortar material comprises the following steps:
s1, mixing cement, filler, water reducer, defoamer, cellulose ether and retarder according to the formula amount in a horizontal mixer, and uniformly stirring to obtain a mixed material;
s2, adding the expanded and vitrified micro bubbles into the mixed material, stirring for 1-2min, discharging, inspecting and packaging to obtain the light cement-based leveling mortar material.
Example 3
A light cement-based leveling mortar material comprises the following components in parts by mass:
32 parts of silicate cement, 12 parts of sulphoaluminate cement, 10 parts of expanded and vitrified microbeads, 35 parts of quartz sand, 7 parts of calcium carbonate, 4 parts of an expanding agent, 0.3 part of a water reducing agent, 0.1 part of a defoaming agent, 0.1 part of cellulose ether and 0.1 part of a retarder.
Further, the Portland cement is ordinary Portland cement PO42.5; the sulphoaluminate cement is quick hardening sulphoaluminate cement R.SAC42.5.
Further, the expanding agent is anhydrous gypsum and semi-hydrated gypsum with a mass ratio of 1:1.
A preparation method of a light cement-based leveling mortar material comprises the following steps:
s1, mixing cement, filler, water reducer, defoamer, cellulose ether and retarder according to the formula amount in a horizontal mixer, and uniformly stirring to obtain a mixed material;
s2, adding the expanded and vitrified micro bubbles into the mixed material, stirring for 1-2min, discharging, inspecting and packaging to obtain the light cement-based leveling mortar material.
Comparative example 1
The cement-based leveling mortar material differs from example 2 in that: this comparative example uses an equal amount of crushed stone to replace the expanded and vitrified microbeads.
Comparative example 2
The cement-based leveling mortar material comprises the following components in parts by mass:
50 parts of Portland cement, 9 parts of expanded and vitrified micro bubbles, 35 parts of quartz sand, 6 parts of calcium carbonate, 0.2 part of water reducer, 0.07 part of defoamer, 0.08 part of cellulose ether and 0.07 part of retarder.
Further, the Portland cement is ordinary Portland cement PO42.5, and the expanding agent is semi-hydrated gypsum.
The preparation method of this comparative example was the same as that of comparative example 2.
Performance testing
The cement-based leveling mortar materials of examples 1 to 3 and comparative examples 1 to 2 were taken and tested for compressive strength, tensile bond strength and dry density after molding, respectively, and the results are shown in Table 1.
TABLE 1
Figure BDA0004023670520000061
Referring to Table 1, the present inventionThe light cement-based leveling mortar material has a 1-day compressive strength of 6.4MPa or more, a 28-day compressive strength of 12MPa or more, a tensile bonding strength of not less than 0.5MPa, and a dry density of 1200-1300kg/m after molding 3 The material has the characteristics of high strength and low material density. The comparative example 1 does not contain expanded and vitrified small balls, and has a large dry density after molding. The combination property of the comparative example 1 is obviously reduced due to the excessive amount of the cementing material.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.

Claims (9)

1. The light cement-based leveling mortar material is characterized by comprising the following components in parts by mass:
33-44 parts of cement, 8-10 parts of expanded and vitrified microbeads, 40-55 parts of filler, 4-5 parts of expanding agent, 0.1-0.3 part of water reducing agent, 0.05-0.1 part of defoaming agent, 0.05-0.1 part of cellulose ether and 0.05-0.1 part of retarder.
2. The lightweight cement-based leveling mortar material of claim 1 wherein: the cement comprises the following components in percentage by mass (25-32): silicate cement and sulphoaluminate cement of (8-12).
3. The lightweight cement-based leveling mortar material of claim 2, wherein: the Portland cement is ordinary Portland cement PO42.5 and/or ordinary Portland cement PO42.5R; the sulphoaluminate cement is quick hardening sulphoaluminate cement R.SAC42.5 and/or low alkalinity sulphoaluminate cement R.SAC42.5.
4. The lightweight cement-based leveling mortar material of claim 1 wherein: the filler comprises the following components in percentage by mass (35-45): the quartz sand of (5-10) and calcium carbonate, wherein the particle size of the quartz sand is 40-70 meshes, and the particle size of the calcium carbonate is 200-325 meshes.
5. The lightweight cement-based leveling mortar material of claim 1 wherein: the expanding agent is anhydrous gypsum and/or semi-hydrated gypsum.
6. The lightweight cement-based leveling mortar material of claim 1 wherein: the particle size of the expanded and vitrified small balls is 70-90 meshes.
7. The lightweight cement-based leveling mortar material of claim 1 wherein: the compressive strength of the light cement-based leveling mortar material after being molded for 1 day is more than or equal to 6.0MPa, the compressive strength of the light cement-based leveling mortar material after being molded for 28 days is more than or equal to 12.0MPa, the tensile bonding strength is more than or equal to 0.5MPa, and the dry density after being molded is about 1200-1300kg/m 3 。
8. A method of preparing a lightweight cementitious leveling mortar material as claimed in any one of claims 1 to 7, comprising the steps of:
s1, mixing and uniformly stirring cement, filler, a water reducing agent, a defoaming agent, cellulose ether and a retarder according to the formula amount to obtain a mixed material;
s2, adding the expanded and vitrified micro bubbles into the mixed material, stirring, and discharging to obtain the light cement-based leveling mortar material.
9. The method for preparing a lightweight cement-based leveling mortar material according to claim 8, wherein: in the step S2, the stirring time is 1-2min.
CN202211699857.8A 2022-12-28 2022-12-28 Light cement-based leveling mortar material and preparation method thereof Pending CN116041018A (en)

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