CN115417691A - Light thermal-insulation sound-insulation self-leveling mortar for floors and preparation method thereof - Google Patents
Light thermal-insulation sound-insulation self-leveling mortar for floors and preparation method thereof Download PDFInfo
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- CN115417691A CN115417691A CN202211072384.9A CN202211072384A CN115417691A CN 115417691 A CN115417691 A CN 115417691A CN 202211072384 A CN202211072384 A CN 202211072384A CN 115417691 A CN115417691 A CN 115417691A
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 60
- 238000009413 insulation Methods 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title abstract description 19
- 239000000835 fiber Substances 0.000 claims abstract description 121
- -1 polypropylene Polymers 0.000 claims abstract description 88
- 239000004743 Polypropylene Substances 0.000 claims abstract description 78
- 229920001155 polypropylene Polymers 0.000 claims abstract description 78
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 36
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 27
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 27
- 239000011521 glass Substances 0.000 claims abstract description 20
- 239000004576 sand Substances 0.000 claims abstract description 20
- 239000011398 Portland cement Substances 0.000 claims abstract description 19
- 239000010881 fly ash Substances 0.000 claims abstract description 19
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 18
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 18
- 239000011324 bead Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 38
- 239000000243 solution Substances 0.000 claims description 22
- 239000008367 deionised water Substances 0.000 claims description 18
- 229910021641 deionized water Inorganic materials 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 17
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 16
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims description 14
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 claims description 13
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 claims description 13
- 238000004321 preservation Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 239000008096 xylene Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 6
- 238000009835 boiling Methods 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 229920000570 polyether Polymers 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 6
- 229920005552 sodium lignosulfonate Polymers 0.000 claims description 6
- 230000008961 swelling Effects 0.000 claims description 6
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 4
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 4
- 229920001732 Lignosulfonate Polymers 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 229920005551 calcium lignosulfonate Polymers 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 claims description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 4
- 239000001110 calcium chloride Substances 0.000 abstract description 2
- 229910001628 calcium chloride Inorganic materials 0.000 abstract description 2
- 230000008021 deposition Effects 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 230000008092 positive effect Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 9
- 206010042674 Swelling Diseases 0.000 description 5
- 239000004005 microsphere Substances 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 208000004434 Calcinosis Diseases 0.000 description 1
- 229920002821 Modacrylic Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/52—Sound-insulating 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/60—Flooring materials
- C04B2111/62—Self-levelling compositions
-
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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
The invention relates to the technical field of mortar, in particular to light thermal-insulation sound-insulation self-leveling mortar for floors and a preparation method thereof, wherein the mortar comprises the following raw materials: portland cement, modified polypropylene fibers, fly ash, river sand, a water reducing agent, a defoaming agent, hollow glass beads and water. According to the invention, the modified polypropylene fiber is added, and calcium carbonate particles are uniformly deposited on the surface of the fiber by using the calcium chloride and sodium carbonate solution, so that on one hand, the roughness of the surface of the fiber is improved, on the other hand, the hydrophilicity of the fiber is also improved, and the fiber is favorably and uniformly dispersed in mortar, so that the strength of the mortar can be improved; the polypropylene fiber is first treated to eliminate oil and swell, and this is favorable to the subsequent homogeneous deposition of calcium carbonate onto the surface of polypropylene fiber and has positive effect on improving the performance of mortar.
Description
Technical Field
The invention relates to the technical field of mortar, in particular to light thermal-insulation sound-insulation self-leveling mortar for floors and a preparation method thereof.
Background
The mortar is synthesized by adding water into sand and cementing materials according to a certain proportion. In order to improve the quality of the mortar, fiber materials such as carbon fibers, polypropylene fibers, plant fibers and the like are added. Compared with carbon fiber and plant fiber, the polypropylene fiber is durable and cheap, and has wide application.
The polypropylene fibers have smooth surfaces, lack hydrophilic groups and show hydrophobicity, so that the polypropylene fibers cannot be well dispersed in the mortar, and the overall strength of the hardened mortar is affected due to uneven dispersion of the polypropylene fibers in the mortar. Therefore, we propose a light thermal insulation sound insulation self-leveling mortar for floors and a preparation method thereof to solve the above problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides light thermal-insulation sound-insulation self-leveling mortar for floors and a preparation method thereof, so as to overcome the problems in the background art.
In order to achieve the above purpose, the technical scheme of the invention is realized by the following technical scheme: a light thermal-insulation sound-insulation self-leveling mortar for floors comprises the following raw materials in parts by weight: 200-300 parts of portland cement, 20-30 parts of modified polypropylene fiber, 60-70 parts of fly ash, 30-50 parts of river sand, 5-10 parts of water reducing agent, 6-10 parts of defoaming agent, 5-8 parts of hollow glass microsphere and 60-100 parts of water.
Preferably, 250 parts of portland cement, 25 parts of modified polypropylene fibers, 65 parts of fly ash, 40 parts of river sand, 8 parts of a water reducing agent, 7 parts of a defoaming agent, 6 parts of hollow glass beads and 70 parts of water.
Preferably, the preparation method of the modified polypropylene fiber is as follows, S1: boiling polypropylene fiber in deionized water for 2-3h, taking out, adding into mixed solution of deionized water and xylene, swelling at 45-55 deg.C for 0.5-1h, and separating to obtain pretreated polypropylene fiber; s2: and (2) putting the pretreated polypropylene fiber into a calcium chloride solution, uniformly stirring, then adding a sodium carbonate solution and disodium ethylene diamine tetraacetate, continuously stirring for 10-20min, separating, cleaning and drying to obtain the modified polypropylene fiber.
Preferably, in step S1, the volume ratio of the deionized water to the xylene is 1:1.
preferably, in step S2, the concentration of the calcium chloride solution is 0.1mol/L, and the concentration of the sodium carbonate solution is 0.1mol/L.
Preferably, in step S2, the disodium edetate is 0.5% of the total mass of the calcium chloride solution and the sodium carbonate solution.
Preferably, in step S2, the modacrylic fiber includes 50% of each of short fibers and long fibers, the short fibers having a length of 5mm and the long fibers having a length of 16mm.
Preferably, the water reducing agent is one or more of calcium lignosulfonate, sodium lignosulfonate and magnesium lignosulfonate.
Preferably, the defoaming agent is one or two of polydimethylsiloxane and polyether modified polysiloxane.
The invention also provides a preparation method of the light heat-preservation sound-insulation self-leveling mortar for the floor, which comprises the following steps:
(1) Stirring portland cement, modified polypropylene fibers, fly ash, river sand, a water reducing agent, a defoaming agent and hollow glass beads to obtain a mixed material;
(2) And (3) stirring water into the mixed material, and continuously stirring uniformly to obtain the light heat-insulating sound-insulating self-leveling mortar.
Compared with the prior art, the invention has the following beneficial effects:
1. by improving the common polypropylene fiber and adding the hollow glass beads into the mortar, the thermal insulation performance and the compressive strength of the mortar are improved.
2. By adding the modified polypropylene fiber and utilizing the calcium chloride and sodium carbonate solution to uniformly deposit calcium carbonate particles on the surface of the fiber, on one hand, the roughness of the surface of the fiber is improved, on the other hand, the hydrophilicity of the fiber is also improved, and the fiber is favorably and uniformly dispersed in mortar, so that the strength of the mortar can be improved; the polypropylene fiber is first treated to eliminate oil and swell, and this is favorable to the subsequent homogeneous deposition of calcium carbonate onto the surface of polypropylene fiber and has positive effect on improving the performance of mortar.
3. By combining long fibers and short fibers with the modified polypropylene fibers, the long fibers and the short fibers can play a combined role in the stressed deformation process of the hardened mortar matrix, and play a positive role in improving the mortar performance.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A light thermal-insulation sound-insulation self-leveling mortar for floors comprises the following raw materials in parts by weight: 200 parts of portland cement, 20 parts of modified polypropylene fiber, 60 parts of fly ash, 30 parts of river sand, 5 parts of a water reducing agent, 6 parts of a defoaming agent, 5 parts of hollow glass beads and 60 parts of water. Wherein the water reducing agent is calcium lignosulphonate, and the defoaming agent is polydimethylsiloxane.
The preparation method of the modified polypropylene fiber is as follows,
s1: and (2) boiling the polypropylene fiber in deionized water for 2h, taking out, adding the boiled polypropylene fiber into a mixed solution of the deionized water and xylene, carrying out swelling treatment at 45 ℃ for 0.5h, and separating to obtain the pretreated polypropylene fiber. Wherein the volume ratio of the deionized water to the dimethylbenzene is 1:1.
s2: and (2) putting the pretreated polypropylene fiber into 0.1mol/L calcium chloride solution, uniformly stirring, then adding 0.1mol/L sodium carbonate solution and disodium ethylene diamine tetraacetate, continuously stirring for 10min, separating, cleaning and drying to obtain the modified polypropylene fiber. Wherein, the disodium ethylene diamine tetraacetate accounts for 0.5 percent of the total mass of the calcium chloride solution and the sodium carbonate solution. The short fiber and the long fiber in the modified polypropylene fiber respectively account for 50 percent, the length of the short fiber is 5mm, and the length of the long fiber is 16mm.
The preparation method of the light thermal-insulation sound-insulation self-leveling mortar for the floor comprises the following steps:
(1) Stirring portland cement, modified polypropylene fibers, fly ash, river sand, a water reducing agent, a defoaming agent and hollow glass beads to obtain a mixed material;
(2) And (3) stirring water into the mixed material, and continuously stirring uniformly to obtain the light heat-insulating sound-insulating self-leveling mortar.
Example 2
A light thermal-insulation sound-insulation self-leveling mortar for floors comprises the following raw materials in parts by weight: 250 parts of portland cement, 25 parts of modified polypropylene fiber, 65 parts of fly ash, 40 parts of river sand, 8 parts of water reducing agent, 7 parts of defoaming agent, 6 parts of hollow glass microsphere and 70 parts of water. Wherein the water reducing agent is sodium lignosulphonate, and the defoaming agent is polyether modified polysiloxane.
The preparation method of the modified polypropylene fiber comprises the following steps,
s1: and (2) boiling the polypropylene fiber in deionized water for 2.5h, taking out, adding the boiled polypropylene fiber into a mixed solution of deionized water and xylene, carrying out swelling treatment at 50 ℃ for 1h, and separating to obtain the pretreated polypropylene fiber. Wherein the volume ratio of the deionized water to the dimethylbenzene is 1:1.
s2: and (2) putting the pretreated polypropylene fiber into 0.1mol/L calcium chloride solution, uniformly stirring, then adding 0.1mol/L sodium carbonate solution and disodium ethylene diamine tetraacetate, continuously stirring for 15min, separating, cleaning and drying to obtain the modified polypropylene fiber. Wherein, the disodium ethylene diamine tetraacetate accounts for 0.5 percent of the total mass of the calcium chloride solution and the sodium carbonate solution. The short fiber and the long fiber in the modified polypropylene fiber respectively account for 50 percent, the length of the short fiber is 5mm, and the length of the long fiber is 16mm.
The preparation method of the light thermal-insulation sound-insulation self-leveling mortar for the floor comprises the following steps:
(1) Stirring portland cement, modified polypropylene fibers, fly ash, river sand, a water reducing agent, a defoaming agent and hollow glass beads to obtain a mixed material;
(2) And (3) stirring water into the mixed material, and continuously stirring uniformly to obtain the light heat-preservation sound-insulation self-leveling mortar.
Example 3
A light thermal-insulation sound-insulation self-leveling mortar for floors comprises the following raw materials in parts by weight: 300 parts of Portland cement, 30 parts of modified polypropylene fiber, 70 parts of fly ash, 50 parts of river sand, 10 parts of water reducing agent, 10 parts of defoaming agent, 8 parts of hollow glass microsphere and 100 parts of water. Wherein the water reducing agent is magnesium lignosulfonate, and the defoaming agent is polydimethylsiloxane.
The preparation method of the modified polypropylene fiber comprises the following steps,
s1: and (2) boiling the polypropylene fiber in deionized water for 3h, taking out, adding the boiled polypropylene fiber into a mixed solution of the deionized water and xylene, carrying out swelling treatment at 55 ℃ for 1h, and separating to obtain the pretreated polypropylene fiber. Wherein the volume ratio of the deionized water to the dimethylbenzene is 1:1.
s2: and (2) putting the pretreated polypropylene fiber into 0.1mol/L calcium chloride solution, uniformly stirring, then adding 0.1mol/L sodium carbonate solution and disodium ethylene diamine tetraacetate, continuously stirring for 20min, separating, cleaning and drying to obtain the modified polypropylene fiber. Wherein, the disodium ethylene diamine tetraacetate accounts for 0.5 percent of the total mass of the calcium chloride solution and the sodium carbonate solution. The short fiber and the long fiber in the modified polypropylene fiber respectively account for 50 percent, the length of the short fiber is 5mm, and the length of the long fiber is 16mm.
The preparation method of the light thermal-insulation sound-insulation self-leveling mortar for the floor comprises the following steps:
(1) Stirring portland cement, modified polypropylene fibers, fly ash, river sand, a water reducing agent, a defoaming agent and hollow glass beads to obtain a mixed material;
(2) And (3) stirring water into the mixed material, and continuously stirring uniformly to obtain the light heat-insulating sound-insulating self-leveling mortar.
Comparative example 1
A light thermal-insulation sound-insulation self-leveling mortar for floors comprises the following raw materials in parts by weight: 250 parts of portland cement, 25 parts of polypropylene fiber, 65 parts of fly ash, 40 parts of river sand, 8 parts of a water reducing agent, 7 parts of a defoaming agent, 6 parts of hollow glass beads and 70 parts of water. Wherein the water reducing agent is sodium lignosulphonate, and the defoaming agent is polyether modified polysiloxane.
The polypropylene fiber comprises 50% of short fiber and long fiber, the short fiber has a length of 5mm, and the long fiber has a length of 16mm.
The preparation method of the light thermal-insulation sound-insulation self-leveling mortar for the floor comprises the following steps:
(1) Stirring portland cement, polypropylene fibers, fly ash, river sand, a water reducing agent, a defoaming agent and hollow glass beads to obtain a mixed material;
(2) And (3) stirring water into the mixed material, and continuously stirring uniformly to obtain the light heat-insulating sound-insulating self-leveling mortar.
Comparative example 2
A light thermal-insulation sound-insulation self-leveling mortar for floors comprises the following raw materials in parts by weight: 250 parts of portland cement, 25 parts of modified polypropylene fiber, 65 parts of fly ash, 40 parts of river sand, 8 parts of water reducing agent, 7 parts of defoaming agent, 6 parts of hollow glass microsphere and 70 parts of water. Wherein the water reducing agent is sodium lignosulphonate, and the defoaming agent is polyether modified polysiloxane.
The preparation method of the modified polypropylene fiber comprises the following steps of putting the polypropylene fiber into 0.1mol/L calcium chloride solution, uniformly stirring, then adding 0.1mol/L sodium carbonate solution and disodium ethylene diamine tetraacetate, continuously stirring for 15min, separating, cleaning and drying to obtain the modified polypropylene fiber. Wherein, the disodium ethylene diamine tetraacetate accounts for 0.5 percent of the total mass of the calcium chloride solution and the sodium carbonate solution. The short fiber and the long fiber in the modified polypropylene fiber respectively account for 50 percent, the length of the short fiber is 5mm, and the length of the long fiber is 16mm.
The preparation method of the light thermal-insulation sound-insulation self-leveling mortar for the floor comprises the following steps:
(1) Stirring portland cement, modified polypropylene fibers, fly ash, river sand, a water reducing agent, a defoaming agent and hollow glass beads to obtain a mixed material;
(2) And (3) stirring water into the mixed material, and continuously stirring uniformly to obtain the light heat-insulating sound-insulating self-leveling mortar.
Comparative example 3
A light thermal-insulation sound-insulation self-leveling mortar for floors comprises the following raw materials in parts by weight: 250 parts of portland cement, 25 parts of modified polypropylene fiber, 65 parts of fly ash, 40 parts of river sand, 8 parts of a water reducing agent, 7 parts of a defoaming agent, 6 parts of hollow glass beads and 70 parts of water. Wherein the water reducing agent is sodium lignosulphonate, and the defoaming agent is polyether modified polysiloxane.
The preparation method of the modified polypropylene fiber is as follows,
s1: and (3) boiling the polypropylene fiber in deionized water for 2.5h, taking out, putting into a mixed solution of deionized water and xylene, carrying out swelling treatment at 50 ℃ for 1h, and separating to obtain the pretreated polypropylene fiber. Wherein the volume ratio of the deionized water to the dimethylbenzene is 1:1.
s2: and (2) putting the pretreated polypropylene fiber into 0.1mol/L calcium chloride solution, uniformly stirring, then adding 0.1mol/L sodium carbonate solution and disodium ethylene diamine tetraacetate, continuously stirring for 15min, separating, cleaning and drying to obtain the modified polypropylene fiber. Wherein, the disodium ethylene diamine tetraacetate accounts for 0.5 percent of the total mass of the calcium chloride solution and the sodium carbonate solution. The length of the modified polypropylene fiber is 5mm.
The preparation method of the light thermal-insulation sound-insulation self-leveling mortar for the floor comprises the following steps:
(1) Stirring portland cement, modified polypropylene fibers, fly ash, river sand, a water reducing agent, a defoaming agent and hollow glass beads to obtain a mixed material;
(2) And (3) stirring water into the mixed material, and continuously stirring uniformly to obtain the light heat-insulating sound-insulating self-leveling mortar.
Performance detection
The test method comprises the following steps: the hardened mortar products of examples 1 to 3 and comparative examples 1 to 3 were tested for their properties according to the GB/T-20473-2006 standard. Specific detection results are shown in table 1.
TABLE 1 Performance test
| Group of | Thermal conductivity W/(m.k) | Compressive strength MPa |
| Example 1 | 0.051 | 2.20 |
| Example 2 | 0.048 | 2.25 |
| Example 3 | 0.061 | 2.18 |
| Comparative example 1 | 0.059 | 1.95 |
| Comparative example 2 | 0.056 | 2.07 |
| Comparative example 3 | 0.060 | 2.04 |
As can be seen from the above table: the thermal conductivity coefficient of the mortar in the embodiment and the comparative example is less than 0.1W/(m.k), which shows that the thermal insulation performance of the mortar is excellent.
Compared with the comparative examples 1, 2 and 3 and the example 2, the addition of the modified polypropylene fibers can better improve the strength performance of the mortar, and in addition, the pretreatment of the polypropylene fibers and the combination of the polypropylene fibers with different lengths play a positive role in improving the strength of the mortar.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The building floor light heat-preservation sound-insulation self-leveling mortar is characterized by comprising the following raw materials in parts by weight: 200-300 parts of portland cement, 20-30 parts of modified polypropylene fibers, 60-70 parts of fly ash, 30-50 parts of river sand, 5-10 parts of a water reducing agent, 6-10 parts of a defoaming agent, 5-8 parts of hollow glass beads and 60-100 parts of water.
2. The building floor light heat-insulation sound-insulation self-leveling mortar according to claim 1, characterized by comprising 250 parts of portland cement, 25 parts of modified polypropylene fibers, 65 parts of fly ash, 40 parts of river sand, 8 parts of a water reducing agent, 7 parts of a defoaming agent, 6 parts of hollow glass beads and 70 parts of water.
3. The building floor light heat-preservation sound-insulation self-leveling mortar as claimed in claim 1, wherein the modified polypropylene fiber is prepared by the following steps,
s1: boiling polypropylene fiber in deionized water for 2-3h, taking out, adding into mixed solution of deionized water and xylene, swelling at 45-55 deg.C for 0.5-1h, and separating to obtain pretreated polypropylene fiber;
s2: and (2) putting the pretreated polypropylene fiber into a calcium chloride solution, uniformly stirring, then adding a sodium carbonate solution and disodium ethylene diamine tetraacetate, continuously stirring for 10-20min, separating, cleaning and drying to obtain the modified polypropylene fiber.
4. The building floor light heat-preservation sound-insulation self-leveling mortar according to claim 3, wherein in the step S1, the volume ratio of the deionized water to the xylene is 1:1.
5. the building floor light-weight heat-preservation sound-insulation self-leveling mortar according to claim 3, wherein in the step S2, the concentration of the calcium chloride solution is 0.1mol/L, and the concentration of the sodium carbonate solution is 0.1mol/L.
6. The building floor light heat-preservation sound-insulation self-leveling mortar according to claim 3, wherein in the step S2, the disodium ethylene diamine tetraacetate accounts for 0.5% of the total mass of the calcium chloride solution and the sodium carbonate solution.
7. The building floor light heat-preservation sound-insulation self-leveling mortar according to claim 3, wherein in the step S2, short fibers and long fibers in the modified polypropylene fibers account for 50% of each other, the short fibers are 5mm in length, and the long fibers are 16mm in length.
8. The building floor lightweight thermal insulation sound insulation self-leveling mortar according to claim 1, wherein the water reducing agent is one or more of calcium lignosulfonate, sodium lignosulfonate and magnesium lignosulfonate.
9. The building floor light-weight heat-preservation sound-insulation self-leveling mortar as claimed in claim 1, wherein the defoaming agent is one or a combination of polydimethylsiloxane and polyether modified polysiloxane.
10. A method for preparing a self-levelling screed according to any one of claims 1 to 9, characterised in that the method comprises the steps of:
(1) Stirring portland cement, modified polypropylene fibers, fly ash, river sand, a water reducing agent, a defoaming agent and hollow glass beads to obtain a mixed material;
(2) And (3) stirring water into the mixed material, and continuously stirring uniformly to obtain the light heat-preservation sound-insulation self-leveling mortar.
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| CN116063025A (en) * | 2023-03-30 | 2023-05-05 | 中国标准化研究院 | Composite mineral admixture for building and preparation method thereof |
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Application publication date: 20221202 |