CN112608097A - Mortar and preparation method thereof - Google Patents
Mortar and preparation method thereof Download PDFInfo
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- CN112608097A CN112608097A CN202011415422.7A CN202011415422A CN112608097A CN 112608097 A CN112608097 A CN 112608097A CN 202011415422 A CN202011415422 A CN 202011415422A CN 112608097 A CN112608097 A CN 112608097A
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 130
- 238000002360 preparation method Methods 0.000 title claims description 17
- 239000000843 powder Substances 0.000 claims abstract description 120
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000004576 sand Substances 0.000 claims abstract description 52
- 239000000919 ceramic Substances 0.000 claims abstract description 51
- 239000004567 concrete Substances 0.000 claims abstract description 46
- 239000004568 cement Substances 0.000 claims abstract description 44
- 230000008719 thickening Effects 0.000 claims abstract description 41
- 239000004743 Polypropylene Substances 0.000 claims abstract description 38
- 239000000835 fiber Substances 0.000 claims abstract description 38
- -1 polypropylene Polymers 0.000 claims abstract description 38
- 229920001155 polypropylene Polymers 0.000 claims abstract description 38
- 239000002253 acid Substances 0.000 claims abstract description 34
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 34
- 239000002893 slag Substances 0.000 claims abstract description 34
- 239000002904 solvent Substances 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims description 71
- 238000003756 stirring Methods 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 9
- 239000002562 thickening agent Substances 0.000 claims description 8
- 229920005646 polycarboxylate Polymers 0.000 claims description 5
- 239000008030 superplasticizer Substances 0.000 claims description 5
- 239000010881 fly ash Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 11
- 230000032683 aging Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000004134 energy conservation Methods 0.000 abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 44
- 230000000052 comparative effect Effects 0.000 description 14
- 238000012360 testing method Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 3
- 239000011325 microbead Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229960000892 attapulgite Drugs 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229920003086 cellulose ether Polymers 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 238000012113 quantitative test Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 229940080314 sodium bentonite Drugs 0.000 description 1
- 229910000280 sodium bentonite Inorganic materials 0.000 description 1
- 238000003860 storage 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
- 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
- C04B2201/30—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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to mortar, which comprises the following components in parts by weight: cement: 10-18 parts; slag powder: 5-12 parts of a solvent; steam aerated concrete powder: 5-12 parts of a solvent; ceramic sand: 20-36 parts; thickening powder: 4-9 parts; polypropylene fiber: 2-6 parts; 1-2 parts of a polycarboxylic acid water reducing agent. According to the invention, on the basis of ensuring that the mortar has the advantages of high strength, high thermal insulation performance, aging resistance, good fireproof performance and the like, the reutilization of wastes is realized, the effects of energy conservation and environmental protection are achieved, and the material cost for preparing the mortar is greatly reduced.
Description
Technical Field
The invention relates to the technical field of environment-friendly building materials, in particular to mortar and a preparation method thereof.
Background
The mortar is a main material in buildings, and is a pre-mixed dry-mixed material prepared by mixing various light materials as aggregate, cement as a cementing material and some modified additives through stirring. At present, the mortar commonly used in the market is inorganic vitrified micro-bead thermal insulation mortar, and the inorganic vitrified micro-bead thermal insulation mortar is widely concerned due to the advantages of strong thermal insulation performance, fire resistance, high strength, aging resistance and the like.
However, as the research on mortar is advanced, the cost problem of mortar related formulations is gradually considered, and the cost of the inorganic vitrified micro bubble thermal insulation mortar is increased due to the high manufacturing cost, but the performances of the mortar are greatly reduced when the cost of the raw material of the mortar is reduced, so that how to reduce the manufacturing cost of the mortar becomes a key concern on the premise of ensuring the excellent performances of the mortar.
Disclosure of Invention
Therefore, the mortar and the preparation method thereof are needed to reduce the manufacturing cost of the mortar on the premise of ensuring various excellent performances of the mortar.
In order to achieve the purpose, the invention provides a technical scheme that:
a mortar comprises the following components in parts by weight:
cement: 10-18 parts;
slag powder: 5-12 parts of a solvent;
steam aerated concrete powder: 5-12 parts of a solvent;
ceramic sand: 20-36 parts;
thickening powder: 4-9 parts;
polypropylene fiber: 2-6 parts;
polycarboxylic acid water reducing agent: 1-2 parts.
Preferably, the mortar comprises, in parts by weight:
cement: 11-16 parts;
slag powder: 5.5-10.5 parts;
steam aerated concrete powder: 5.5-10.5 parts;
ceramic sand: 29-34 parts;
thickening powder: 4.5-7.5 parts;
polypropylene fiber: 2.5-5.5 parts;
polycarboxylic acid water reducing agent: 1.5-2 parts.
Preferably, the mortar comprises, in parts by weight:
cement: 12.5 parts;
slag powder: 8 parts of a mixture;
steam aerated concrete powder: 8 parts of a mixture;
ceramic sand: 31.5 parts;
thickening powder: 6 parts of (1);
polypropylene fiber: 4 parts of a mixture;
polycarboxylic acid water reducing agent: 1.75 parts.
Preferably, the ceramic sand comprises one or more of silt ceramic sand, electroceramic ceramic sand and fly ash ceramic sand.
Preferably, the thickening powder comprises one or more of an inorganic thickener and an organic thickener.
The invention also provides a preparation method of the mortar, which is characterized by comprising the following steps:
mixing cement, slag powder, autoclaved aerated concrete powder and ceramic sand to obtain a mixture A;
adding thickening powder, polypropylene fiber and a polycarboxylic acid water reducing agent into the mixture A to obtain mortar;
wherein,
cement: 10-18 parts;
slag powder: 5-12 parts of a solvent;
steam aerated concrete powder: 5-12 parts of a solvent;
ceramic sand: 20-36 parts;
thickening powder: 4-9 parts;
polypropylene fiber: 2-6 parts;
polycarboxylic acid water reducing agent: 1-2 parts.
Preferably, the cement, the slag powder, the autoclaved aerated concrete powder and the ceramic sand are placed in a mortar stirrer to be uniformly stirred to obtain a mixture A.
Preferably, water is added into the mixture A, the mixture B is obtained by uniformly stirring, thickening powder, polypropylene fibers and a polycarboxylic acid water reducing agent are added into the mixture B, and the mortar is obtained, wherein the mass ratio of the mixture A to the water is 1: 0.6.
Preferably, the thickening powder, the polypropylene fiber and the polycarboxylic acid water reducing agent are added into the mixture B and are continuously and uniformly stirred, and the mortar is obtained.
Preferably, the thickening powder, the polypropylene fiber and the polycarboxylic acid water reducing agent are added into the mixture B and are continuously and uniformly stirred, and the stirring time is 5 min-min.
The mortar in the embodiment of the invention has the following beneficial effects:
compared with the prior art, the mortar prepared from the composition has the advantages of high strength, high heat insulation performance, aging resistance and good fireproof performance, and the thickening powder, the polypropylene fiber and the polycarboxylic acid water reducing agent in the ratio in the mortar can effectively improve the fluidity of the mortar, so that the internal tight connection degree of the mortar is deepened, the internal structural performance of the mortar is effectively improved, and the strength of the mortar is improved; in addition, slag powder, autoclaved aerated concrete powder and ceramic sand can replace a part of cement in a mortar system to reduce the using amount of the cement in the mortar system, and the slag powder, the autoclaved aerated concrete powder and the ceramic sand are generally used as wastes in actual life.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
The experimental procedures in the following examples are conventional unless otherwise specified. Test materials, reagents and the like used in the following examples are commercially available unless otherwise specified. In the quantitative tests in the following examples, three replicates were set, and the data are the mean or the mean ± standard deviation of the three replicates.
In addition, "and/or" in the whole text includes three schemes, taking a and/or B as an example, including a technical scheme, and a technical scheme that a and B meet simultaneously; in addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The embodiment of the invention provides mortar, which comprises the following components in parts by weight:
cement: 10-18 parts;
slag powder: 5-12 parts of a solvent;
steam aerated concrete powder: 5-12 parts of a solvent;
ceramic sand: 20-36 parts;
thickening powder: 4-9 parts;
polypropylene fiber: 2-6 parts;
polycarboxylic acid water reducing agent: 1-2 parts.
Compared with the prior art, the mortar prepared from the composition has the advantages of high strength, high heat insulation performance, aging resistance and good fireproof performance, and the thickening powder, the polypropylene fiber and the polycarboxylic acid water reducing agent in the ratio in the mortar can effectively improve the fluidity of the mortar, so that the internal tight connection degree of the mortar is deepened, the internal structural performance of the mortar is effectively improved, and the strength of the mortar is improved; in addition, slag powder, autoclaved aerated concrete powder and ceramic sand can replace a part of cement in a mortar system to reduce the using amount of the cement in the mortar system, and the slag powder, the autoclaved aerated concrete powder and the ceramic sand are generally used as wastes in actual life.
In some embodiments, the mortar comprises, in parts by weight:
cement: 11-16 parts;
slag powder: 5.5-10.5 parts;
steam aerated concrete powder: 5.5-10.5 parts;
ceramic sand: 29-34 parts;
thickening powder: 4.5-7.5 parts;
polypropylene fiber: 2.5-5.5 parts;
polycarboxylic acid water reducing agent: 1.5-2 parts.
Further, in some embodiments, the mortar comprises, in parts by weight:
cement: 12.5 parts;
slag powder: 8 parts of a mixture;
steam aerated concrete powder: 8 parts of a mixture;
ceramic sand: 31.5 parts;
thickening powder: 6 parts of (1);
polypropylene fiber: 4 parts of a mixture;
polycarboxylic acid water reducing agent: 1.75 parts.
The mortar prepared by selecting the preferred components has higher strength, high heat-insulating property, better aging resistance and fire resistance.
In some embodiments, the cement is one or more of 42.5R composite portland cement, pc32.5 composite portland cement and pc32.5 cement, and the cement is used as a main material of the mortar, so that the mortar has the advantage of high strength.
In some embodiments, the ceramic sand comprises one or more of silt ceramic sand, electric ceramic sand and fly ash ceramic sand, and the addition of the ceramic sand into the mortar can ensure that the mortar has strong heat insulation performance, excellent impermeability, low water absorption rate, and good freezing resistance and durability.
In some embodiments, the ceramic sand has a particle size of 5mm to 20mm, so that the ceramic sand can be effectively dispersed in the mortar to enhance the compressive strength of the mortar.
Specifically, the particle size of the ceramic sand is 5-15 mm.
Specifically, the particle size of the ceramic sand is 5 mm-10 mm.
In some embodiments, the ceramic sand has a volume weight of 400-600kg/m3So as to enhance the compressive strength of the mortar.
In some embodiments, the thickening powder includes one or more of an inorganic thickener and an organic thickener, so that the mortar has superior water retention during storage and transportation, low bleeding, is not easily separated, and has good plasticity.
Specifically, the inorganic thickener comprises one or more of fumed silica, sodium bentonite, diatomite, attapulgite, a molecular sieve and inorganic silica gel.
Specifically, the organic thickener includes one or more of ethers and polyacrylates.
Specifically, the ether may be, but is not limited to, a cellulose ether.
In some embodiments, the water reducing efficiency of the polycarboxylate superplasticizer is 30-36% so as to improve the strength of the mortar and reduce the water consumption during mixing in the mortar.
In some embodiments, the autoclaved aerated concrete powder has an activity of 65% to promote preparation of mortar, and the autoclaved aerated concrete powder with an activity of 65% can replace a part of cement in a mortar system to reduce the consumption of the cement in the mortar system, and the autoclaved aerated concrete powder is formed by crushing and grinding waste autoclaved aerated bricks, and is generally used as waste in actual life, and the cost of the cement is higher than that of the autoclaved aerated concrete powder, in other words, the autoclaved aerated concrete powder with an activity of 65% is used as a component in the mortar, so that the manufacturing cost of the mortar can be greatly reduced, and the effects of energy conservation and environmental protection are achieved.
In some embodiments, the autoclaved aerated concrete powder has a specific surface area of 1023m2And/kg, so that the autoclaved aerated concrete powder can be fully dispersed in the mortar system, the uniformity of the mortar system is increased, and the compressive strength of the mortar is further enhanced.
In some embodiments, the autoclaved aerated concrete powder has a density of 2.56g/cm3So as to enhance the compressive strength of the mortar.
The invention also provides a preparation method of the mortar, which comprises the following steps:
mixing cement, slag powder, autoclaved aerated concrete powder and ceramic sand to obtain a mixture A;
adding thickening powder, polypropylene fiber and a polycarboxylic acid water reducing agent into the mixture A to obtain mortar;
wherein,
cement: 10-18 parts;
slag powder: 5-12 parts of a solvent;
steam aerated concrete powder: 5-12 parts of a solvent;
ceramic sand: 20-36 parts;
thickening powder: 4-9 parts;
polypropylene fiber: 2-6 parts;
polycarboxylic acid water reducing agent: 1-2 parts.
Compared with the prior art, the preparation method of the mortar in the embodiment of the invention has the advantages that cement is mixed in three solid wastes, namely slag powder, autoclaved aerated concrete powder and ceramic sand, to obtain the mixture A, so that the reutilization of the solid wastes is realized, the energy-saving and environment-friendly effects are achieved, meanwhile, the addition of the autoclaved aerated concrete powder can reduce the using amount of the cement, the autoclaved aerated concrete powder is generally used as a waste in actual life, the cost of the cement is higher than that of the autoclaved aerated concrete powder, and the manufacturing cost of the mortar can be greatly reduced; in addition, the thickening powder, the polypropylene fiber and the polycarboxylic acid water reducing agent are added into the mixture A comprising the cement, the slag powder, the autoclaved aerated concrete powder and the ceramic sand, so that the fluidity of the mortar can be effectively improved, the tight connection degree in the mortar is deepened, the internal structural performance is effectively improved, and the strength of the mortar is improved.
In some embodiments, cement, slag powder, autoclaved aerated concrete powder and ceramic sand are placed in a mortar stirrer and stirred uniformly to obtain a mixture A, so that the mixture A is dispersed uniformly, and the prepared mortar is uniform and good in stability.
Specifically, cement, slag powder, autoclaved aerated concrete powder and ceramic sand are placed in a mortar stirrer to be stirred for 2-10 min, so that the cement, the slag powder, the autoclaved aerated concrete powder and the ceramic sand are fully and uniformly mixed.
Specifically, the stirring time was 5 min.
In some embodiments, water is added into the mixture A, the mixture A is uniformly stirred to obtain a mixture B, and thickening powder, polypropylene fibers and a polycarboxylic acid water reducing agent are added into the mixture B to obtain the mortar, wherein the mass ratio of the mixture A to the water is 1:0.6, so that the prepared mortar is good in workability, strong in plasticity and free of segregation.
Specifically, water is added into the mixture A, and the mixture A is stirred for 2min to 10min to obtain a mixture B.
Specifically, water was added to the mixture A, and the mixture was stirred for 5min to obtain a mixture B.
In some embodiments, the thickening powder, the polypropylene fibers and the polycarboxylic acid water reducing agent are added into the mixture B and are continuously and uniformly stirred to obtain the mortar, so that the mixture B is fully and uniformly mixed with the thickening powder, the polypropylene fibers and the polycarboxylic acid water reducing agent, the fluidity of the mortar is more excellent, the tight connection degree in the mortar is deepened, the internal structural performance is greatly improved, and the strength of the mortar is improved.
In some embodiments, when the thickening powder, the polypropylene fibers and the polycarboxylate superplasticizer are added into the mixture B and are continuously stirred uniformly, the stirring time is 5min to 10min, so that the mixture B is further uniformly mixed with the thickening powder, the polypropylene fibers and the polycarboxylate superplasticizer.
Specifically, the stirring time was 8 min.
The mortar of the present invention will be described below with reference to specific examples, and the raw materials in the examples are all commercially available products unless otherwise specified.
Example 1
Cement: 10 kg;
slag powder: 5 kg;
steam aerated concrete powder: 5 kg;
ceramic sand: 20 kg;
thickening powder: 4 kg;
polypropylene fiber: 2 kg;
polycarboxylic acid water reducing agent: 1 kg;
the preparation method of the mortar comprises the following steps:
mixing cement, slag powder, steam aerated concrete powder and ceramic sand, and placing the mixture in a mortar stirrer to stir for 5min to obtain a mixture A;
adding water into the mixture A, and stirring for 5min to obtain a mixture B, wherein the mass ratio of the mixture A to the water is 1: 0.6;
and adding the thickening powder, the polypropylene fiber and the polycarboxylic acid water reducing agent into the mixture B, and continuously and uniformly stirring for 8min to obtain the mortar.
Example 2
Cement: 18 kg;
slag powder: 12 kg;
steam aerated concrete powder: 12 kg;
ceramic sand: 36 kg;
thickening powder: 9 kg;
polypropylene fiber: 6 kg;
polycarboxylic acid water reducing agent: 2 kg;
the preparation method of the mortar comprises the following steps:
mixing cement, slag powder, steam aerated concrete powder and ceramic sand, and placing the mixture in a mortar stirrer to stir for 5min to obtain a mixture A;
adding water into the mixture A, and stirring for 5min to obtain a mixture B, wherein the mass ratio of the mixture A to the water is 1: 0.6;
and adding the thickening powder, the polypropylene fiber and the polycarboxylic acid water reducing agent into the mixture B, and continuously and uniformly stirring for 8min to obtain the mortar.
Example 3
Cement: 12.5 kg;
slag powder: 8 kg;
steam aerated concrete powder: 8 kg;
ceramic sand: 31.5 kg;
thickening powder: 6 kg;
polypropylene fiber: 4 kg;
polycarboxylic acid water reducing agent: 1.75 kg;
the preparation method of the mortar comprises the following steps:
mixing cement, slag powder, steam aerated concrete powder and ceramic sand, and placing the mixture in a mortar stirrer to stir for 5min to obtain a mixture A;
adding water into the mixture A, and stirring for 5min to obtain a mixture B, wherein the mass ratio of the mixture A to the water is 1: 0.6;
and adding the thickening powder, the polypropylene fiber and the polycarboxylic acid water reducing agent into the mixture B, and continuously and uniformly stirring for 8min to obtain the mortar.
Comparative example 1
The difference between the comparative example 1 and the example 3 is that the conventional inorganic vitrified small balls are adopted in the comparative example 1 to replace the slag powder, the steam aerated concrete powder and the ceramic sand in the example 3, and the rest are the same as the example 3, and the concrete is as follows:
cement: 12.5 kg;
inorganic vitrified micro bubbles: 47.5 kg;
thickening powder: 6 kg;
polypropylene fiber: 4 kg;
polycarboxylic acid water reducing agent: 1.75 kg;
the preparation method of the mortar in comparative example 1 was:
mixing cement and inorganic vitrified micro bubbles, and placing the mixture in a mortar stirrer to stir for 5min to obtain a first stirred sample;
adding water into the stirred sample, and stirring for 5min again to obtain a second-time stirred sample, wherein the mass ratio of the first-time stirred sample to the water is 1: 0.6;
and adding the thickening powder, the polypropylene fiber and the polycarboxylic acid water reducing agent into the sample after the second stirring, and continuously stirring uniformly for 8min to obtain the mortar in the comparative example 1.
Further performance evaluations were made with respect to the mortars prepared in examples 1-3 above, and the mortar prepared in comparative example 1.
Performance evaluation
According to the national standard: GB/T20473 and 2006 building thermal insulation mortarPerformance tests were performed on the mortars prepared in examples 1 to 3 of the present invention and the mortar prepared in comparative example 1, wherein the national standard: the specified dry density standard value of GB/T20473 plus 2006 building thermal insulation mortar is 301-400 kg/m3The compressive strength is more than or equal to 0.4MPa, and the heat conductivity coefficient is less than or equal to 0.085W/(m.k); the test results are shown in table 1.
TABLE 1 Performance evaluation
As shown in table 1, the mortar prepared in examples 1 to 3 of the present invention and the mortar prepared in comparative example 1 both meet the national standard, but as can be seen from table 1, the dry density of the mortar in comparative example 1 is only a little higher than the dry density of the national standard, while the dry density of the mortar in examples 2 to 3 of the present application is much better than the dry density of the standard, and although the dry density of the mortar in example 1 is also only a little higher than the dry density of the national standard, the dry density of the mortar in comparative example 1 is still better than the dry density of the mortar in comparative example 1; from the above, the tightness degree of the mortar prepared in the invention is superior to that of the mortar prepared in the comparative example 1, namely, the tightness degree of the mortar prepared in the invention is superior to that of the traditional inorganic vitrified micro-bead mortar on the basis of energy conservation and environmental protection.
Meanwhile, as can be seen from table 1, the compressive strength of the mortar in examples 1 to 3 of the present invention is also superior to that of the mortar in comparative example 1, that is, the compressive strength of the mortar prepared in the present invention is superior to that of the conventional inorganic vitrified microsphere mortar on the basis of energy saving and environmental protection.
In addition, the thermal conductivity coefficient of the mortar in examples 1-3 of the invention is not obviously different from that of the mortar in comparative example 1, namely the thermal insulation performance of the mortar prepared in the invention is not influenced on the basis of energy conservation and environmental protection.
The mortar in the embodiments 1 to 3 of the invention is also subjected to fire resistance test and aging resistance test, and the test shows that the mortar in the embodiments 1 to 3 of the invention has good fire resistance and aging resistance.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the present specification and directly/indirectly applied to other related technical fields within the spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. The mortar is characterized by comprising the following components in parts by weight:
cement: 10-18 parts;
slag powder: 5-12 parts of a solvent;
steam aerated concrete powder: 5-12 parts of a solvent;
ceramic sand: 20-36 parts;
thickening powder: 4-9 parts;
polypropylene fiber: 2-6 parts;
polycarboxylic acid water reducing agent: 1-2 parts.
2. Mortar according to claim 1, characterized in that it comprises, in parts by weight:
cement: 11-16 parts;
slag powder: 5.5-10.5 parts;
steam aerated concrete powder: 5.5-10.5 parts;
ceramic sand: 29-34 parts;
thickening powder: 4.5-7.5 parts;
polypropylene fiber: 2.5-5.5 parts;
polycarboxylic acid water reducing agent: 1.5-2 parts.
3. Mortar according to claim 1, characterized in that it comprises, in parts by weight:
cement: 12.5 parts;
slag powder: 8 parts of a mixture;
steam aerated concrete powder: 8 parts of a mixture;
ceramic sand: 31.5 parts;
thickening powder: 6 parts of (1);
polypropylene fiber: 4 parts of a mixture;
polycarboxylic acid water reducing agent: 1.75 parts.
4. A screed according to any one of claims 1 to 3 wherein the ceramic sand comprises one or more of silt ceramic sand, electroceramic ceramic sand and fly ash ceramic sand.
5. A screed according to any one of claims 1 to 3 wherein the thickening powder comprises one or more of an inorganic thickener and an organic thickener.
6. The preparation method of the mortar is characterized by comprising the following steps:
mixing cement, slag powder, autoclaved aerated concrete powder and ceramic sand to obtain a mixture A;
adding thickening powder, polypropylene fibers and a polycarboxylic acid water reducing agent into the mixture A to obtain the mortar; wherein,
the cement is as follows: 10-18 parts;
the slag powder: 5-12 parts of a solvent;
the steam aerated concrete powder: 5-12 parts of a solvent;
the pottery sand: 20-36 parts;
the thickening powder comprises the following components: 4-9 parts;
the polypropylene fiber: 2-6 parts;
the polycarboxylic acid water reducing agent comprises the following components: 1-2 parts.
7. The preparation method according to claim 6, wherein the cement, the slag powder, the autoclaved aerated concrete powder and the ceramic sand are placed in a mortar stirrer and stirred uniformly to obtain the mixture A.
8. The preparation method according to claim 6, wherein water is added into the mixture A, the mixture A is uniformly stirred to obtain a mixture B, and the thickening powder, the polypropylene fibers and the polycarboxylic acid water reducing agent are added into the mixture B to obtain the mortar, wherein the mass ratio of the mixture A to the water is 1: 0.6.
9. The preparation method according to claim 8, wherein the thickening powder, the polypropylene fibers and the polycarboxylate superplasticizer are added into the mixture B and are continuously stirred uniformly to obtain the mortar.
10. The preparation method according to claim 9, wherein the thickening powder, the polypropylene fibers and the polycarboxylate superplasticizer are added to the mixture B and are continuously stirred uniformly, and the stirring time is 5-10 min.
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