CN107663067B - Anti-crack mortar - Google Patents
Anti-crack mortar Download PDFInfo
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- CN107663067B CN107663067B CN201711119096.3A CN201711119096A CN107663067B CN 107663067 B CN107663067 B CN 107663067B CN 201711119096 A CN201711119096 A CN 201711119096A CN 107663067 B CN107663067 B CN 107663067B
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- vermiculite powder
- argil
- furfuryl alcohol
- mortar
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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
- C04B28/06—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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/14—Minerals of vulcanic origin
- C04B14/18—Perlite
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
- C04B18/26—Wood, e.g. sawdust, wood shavings
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1022—Non-macromolecular compounds
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant 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
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses anti-crack mortar, which relates to the technical field of building materials and is prepared from the following components in parts by weight: cement, fly ash, vermiculite powder, yellow sand, opal, perlite, cellulose ether, furfuryl alcohol activated pottery clay, wood fiber and water; the anti-crack mortar ensures that each component achieves better synergistic effect through determining the content range of each component, and particularly ensures that the mortar has various performances such as water seepage resistance, impact resistance, wear resistance, water reduction, freezing resistance, crack resistance and the like by being synergistically matched with the action of furfuryl alcohol activated pottery clay.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to anti-crack mortar.
Background
The mortar is a common building material and belongs to a necessary material in building construction. According to performance division, the mortar is divided into a plurality of types, namely combined mortar, caulking mortar, heat-insulating mortar and the like, wherein the combined mortar is the most common, the existing combined mortar has the defects of easiness in hollowing and cracking, poor construction performance, easiness in sagging, poor adhesion with a wall body, too fast water loss, too large loss of strength and easiness in remaining quality hidden troubles, so that the service life of a building is short, in order to improve the anti-cracking effect of the combined mortar, the common method is to improve the ratio of cement in the combined mortar, and when the ratio of the cement to sand is more than 1/2 or less than 1/3, a special cement anti-cracking agent needs to be added, but the use cost of the two anti-cracking mortars is high, and the energy consumption is high.
Disclosure of Invention
The invention aims to provide anti-crack mortar aiming at the existing problems.
The invention is realized by the following technical scheme:
the anti-crack mortar is prepared from the following components in parts by weight: 50-70 parts of cement, 18-22 parts of fly ash, 5-8 parts of vermiculite powder, 80-90 parts of yellow sand, 12-15 parts of opal, 10-16 parts of perlite, 4-6 parts of cellulose ether, 14-19 parts of furfuryl alcohol activated pottery clay, 8-10 parts of wood fiber and 50-80 parts of water.
Further, the preparation method of the furfuryl alcohol activated pottery clay comprises the following steps:
(1) uniformly dispersing argil into deionized water to prepare argil suspension with the mass fraction of 12.5%, adjusting the pH of the argil suspension to 10.2 by adopting an alkaline solution, heating to 88 ℃, and keeping the temperature for 40 min;
(2) adding furfuryl alcohol accounting for 0.35% of the mass of the suspension of the argil prepared in the step (1), stirring for 2 hours at the rotating speed of 3000r/min, then adding the suspension into a vacuum container to carry out vacuum impregnation for 30 minutes, and then carrying out rotary evaporation and drying to constant weight to obtain the furfuryl alcohol activated argil.
Further, the alkaline solution is a sodium hydroxide solution with the mass fraction of 5%.
Further, the vacuum degree in the vacuum container is 0.05 MPa.
Further, the granularity of the yellow sand is 60 meshes.
Further, the cement is aluminate cement.
Further, the vermiculite powder is pretreated, and the pretreatment method comprises the following steps: firstly putting vermiculite powder into a sulfuric acid solution with the mass fraction of 10% to soak for 1 hour at 90 ℃, then filtering, washing the vermiculite powder to be neutral by using clear water, drying the vermiculite powder to be constant in weight, calcining the vermiculite powder for 30min at 580 ℃, and naturally cooling the vermiculite powder to room temperature to obtain the vermiculite.
Further, the length of the wood fiber is 2.5mm, and the bulk density is 18g/cm3Soaking the wood fiber in 10% ammonia water solution for 30min, filtering, washing and drying.
Compared with the prior art, the invention has the following advantages: according to the anti-crack mortar, the content ranges of the components are determined, so that the components can achieve a better synergistic effect, particularly the synergistic cooperation with the function of furfuryl alcohol activated argil, so that the mortar has various performances such as water seepage resistance, impact resistance, wear resistance, water reduction, frost resistance, crack resistance and the like, and the prepared mortar can reduce water absorption due to the synergistic cooperation among the components, so that the water content of the mortar is reduced, and the frost resistance is enhanced; by adopting the synergistic effect of the perlite and the furfuryl alcohol activated pottery clay, a large amount of fine closed bubbles can be introduced into the structure of the mortar to form a certain telescopic space, so that a certain buffering space is formed under the condition that the day and night temperature difference of the mortar is large, and the durability of the mortar is improved; through the synergistic use of the wood fiber and the furfuryl alcohol activated pottery clay, the tensile property of the concrete is obviously improved, the crack resistance of the concrete can be greatly improved, and the toughness of the wood fiber can be effectively improved by soaking the wood fiber in ammonia water, so that the effect of bearing the stress bending moment, namely the positive bending moment and the negative bending moment, in the mortar is further improved, the comprehensive mechanical property of the mortar is improved, and the service life of the mortar is prolonged.
Detailed Description
Example 1
The anti-crack mortar is prepared from the following components in parts by weight: 50 parts of cement, 18 parts of fly ash, 5 parts of vermiculite powder, 80 parts of yellow sand, 12 parts of opal, 10 parts of perlite, 4 parts of cellulose ether, 14 parts of furfuryl alcohol activated pottery clay, 8 parts of wood fiber and 50 parts of water.
Further, the preparation method of the furfuryl alcohol activated pottery clay comprises the following steps:
(1) uniformly dispersing argil into deionized water to prepare argil suspension with the mass fraction of 12.5%, adjusting the pH of the argil suspension to 10.2 by adopting an alkaline solution, heating to 88 ℃, and keeping the temperature for 40 min;
(2) adding furfuryl alcohol accounting for 0.35% of the mass of the suspension of the argil prepared in the step (1), stirring for 2 hours at the rotating speed of 3000r/min, then adding the suspension into a vacuum container to carry out vacuum impregnation for 30 minutes, and then carrying out rotary evaporation and drying to constant weight to obtain the furfuryl alcohol activated argil.
Further, the alkaline solution is a sodium hydroxide solution with the mass fraction of 5%.
Further, the vacuum degree in the vacuum container is 0.05 MPa.
Further, the granularity of the yellow sand is 60 meshes.
Further, the cement is aluminate cement.
Further, the vermiculite powder is pretreated, and the pretreatment method comprises the following steps: firstly putting vermiculite powder into a sulfuric acid solution with the mass fraction of 10% to soak for 1 hour at 90 ℃, then filtering, washing the vermiculite powder to be neutral by using clear water, drying the vermiculite powder to be constant in weight, calcining the vermiculite powder for 30min at 580 ℃, and naturally cooling the vermiculite powder to room temperature to obtain the vermiculite.
Further, the length of the wood fiber is 2.5mm, and the bulk density is 18g/cm3Soaking the wood fiber in 10% ammonia water solution for 30min, filtering, washing and drying.
Example 2
The anti-crack mortar is prepared from the following components in parts by weight: 70 parts of cement, 22 parts of fly ash, 8 parts of vermiculite powder, 90 parts of yellow sand, 15 parts of opal, 16 parts of perlite, 6 parts of cellulose ether, 19 parts of furfuryl alcohol activated pottery clay, 10 parts of wood fiber and 80 parts of water.
Further, the preparation method of the furfuryl alcohol activated pottery clay comprises the following steps:
(1) uniformly dispersing argil into deionized water to prepare argil suspension with the mass fraction of 12.5%, adjusting the pH of the argil suspension to 10.2 by adopting an alkaline solution, heating to 88 ℃, and keeping the temperature for 40 min;
(2) adding furfuryl alcohol accounting for 0.35% of the mass of the suspension of the argil prepared in the step (1), stirring for 2 hours at the rotating speed of 3000r/min, then adding the suspension into a vacuum container to carry out vacuum impregnation for 30 minutes, and then carrying out rotary evaporation and drying to constant weight to obtain the furfuryl alcohol activated argil.
Further, the alkaline solution is a sodium hydroxide solution with the mass fraction of 5%.
Further, the vacuum degree in the vacuum container is 0.05 MPa.
Further, the granularity of the yellow sand is 60 meshes.
Further, the cement is aluminate cement.
Further, the vermiculite powder is pretreated, and the pretreatment method comprises the following steps: firstly putting vermiculite powder into a sulfuric acid solution with the mass fraction of 10% to soak for 1 hour at 90 ℃, then filtering, washing the vermiculite powder to be neutral by using clear water, drying the vermiculite powder to be constant in weight, calcining the vermiculite powder for 30min at 580 ℃, and naturally cooling the vermiculite powder to room temperature to obtain the vermiculite.
Further, the length of the wood fiber is 2.5mm, and the bulk density is 18g/cm3Said lignocellulosic feedstock being of a massSoaking in 10% ammonia water solution for 30min, filtering, washing, and oven drying.
Example 3
The anti-crack mortar is prepared from the following components in parts by weight: 60 parts of cement, 20 parts of fly ash, 6 parts of vermiculite powder, 85 parts of yellow sand, 13 parts of opal, 12 parts of perlite, 5 parts of cellulose ether, 16 parts of furfuryl alcohol activated pottery clay, 9 parts of wood fiber and 60 parts of water.
Further, the preparation method of the furfuryl alcohol activated pottery clay comprises the following steps:
(1) uniformly dispersing argil into deionized water to prepare argil suspension with the mass fraction of 12.5%, adjusting the pH of the argil suspension to 10.2 by adopting an alkaline solution, heating to 88 ℃, and keeping the temperature for 40 min;
(2) adding furfuryl alcohol accounting for 0.35% of the mass of the suspension of the argil prepared in the step (1), stirring for 2 hours at the rotating speed of 3000r/min, then adding the suspension into a vacuum container to carry out vacuum impregnation for 30 minutes, and then carrying out rotary evaporation and drying to constant weight to obtain the furfuryl alcohol activated argil.
Further, the alkaline solution is a sodium hydroxide solution with the mass fraction of 5%.
Further, the vacuum degree in the vacuum container is 0.05 MPa.
Further, the granularity of the yellow sand is 60 meshes.
Further, the cement is aluminate cement.
Further, the vermiculite powder is pretreated, and the pretreatment method comprises the following steps: firstly putting vermiculite powder into a sulfuric acid solution with the mass fraction of 10% to soak for 1 hour at 90 ℃, then filtering, washing the vermiculite powder to be neutral by using clear water, drying the vermiculite powder to be constant in weight, calcining the vermiculite powder for 30min at 580 ℃, and naturally cooling the vermiculite powder to room temperature to obtain the vermiculite.
Further, the length of the wood fiber is 2.5mm, and the bulk density is 18g/cm3Soaking the wood fiber in 10% ammonia water solution for 30min, filtering, washing and drying.
Comparative example 1: the only difference from example 1 was that the furfuryl alcohol activated china clay was replaced with an equal amount of normal untreated china clay.
Comparative example 2: only differs from example 1 in that no wood fibres are added.
And (3) testing:
and (3) carrying out performance detection on the anti-crack mortar prepared in the examples and the comparative examples:
TABLE 1
| Index requirement | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | |
| Operable time h | ≥1.5 | 1.8 | 1.8 | 1.8 | 1.5 | 1.8 |
| Tensile bond strength MPa | ≥0.7 | 0.92 | 0.94 | 0.91 | 0.78 | 0.85 |
| Tensile bonding strength MPa of immersion | ≥0.7 | 0.87 | 0.89 | 0.85 | 0.75 | 0.83 |
| Folding ratio | ≤3.0 | 2.2 | 2.1 | 2.2 | 2.5 | 2.4 |
As can be seen from Table 1, the mortar prepared by the invention has excellent comprehensive properties.
The mortars of the experimental examples and the mortars of the comparative examples were prepared into blocks of 30cm × 20cm × 10cm in length, width and height, 120 in each group, and the cracking rate after 28 days under the same conditions was compared:
TABLE 2
| Number of cracks/ | |
| Example 1 | 2 |
| Example 2 | 1 |
| Example 3 | 3 |
| Comparative example 1 | 25 |
| Comparative example 2 | 12 |
As can be seen from Table 2, the mortar prepared by the invention has lower cracking rate and better cracking resistance effect.
Claims (6)
1. The anti-crack mortar is characterized by being prepared from the following components in parts by weight: 50-70 parts of cement, 18-22 parts of fly ash, 5-8 parts of vermiculite powder, 80-90 parts of yellow sand, 12-15 parts of opal, 10-16 parts of perlite, 4-6 parts of cellulose ether, 14-19 parts of furfuryl alcohol activated pottery clay, 8-10 parts of wood fiber and 50-80 parts of water; the preparation method of the furfuryl alcohol activated pottery clay comprises the following steps:
(1) uniformly dispersing argil into deionized water to prepare argil suspension with the mass fraction of 12.5%, adjusting the pH of the argil suspension to 10.2 by adopting an alkaline solution, heating to 88 ℃, and keeping the temperature for 40 min;
(2) adding furfuryl alcohol with the mass of 0.35% into the argil suspension prepared in the step (1), stirring at the rotating speed of 3000r/min for 2 hours, then adding into a vacuum container for vacuum impregnation for 30min, and then carrying out rotary evaporation drying to constant weight to obtain furfuryl alcohol activated argil; the vermiculite powder is pretreated, and the pretreatment method comprises the following steps: firstly putting vermiculite powder into a sulfuric acid solution with the mass fraction of 10% to soak for 1 hour at 90 ℃, then filtering, washing the vermiculite powder to be neutral by using clear water, drying the vermiculite powder to be constant in weight, calcining the vermiculite powder for 30min at 580 ℃, and naturally cooling the vermiculite powder to room temperature to obtain the vermiculite.
2. The anti-crack mortar of claim 1, wherein the alkaline solution is a 5% sodium hydroxide solution by weight.
3. The anti-crack mortar of claim 1, wherein the vacuum in the vacuum vessel is 0.05 MPa.
4. The anti-crack mortar of claim 1, wherein the yellow sand has a particle size of 60 mesh.
5. The anti-crack mortar of claim 1, wherein the cement is aluminate cement.
6. The anti-crack mortar of claim 1, wherein the wood fiber has a length of 2.5mm and a bulk density of 18g/cm3Soaking the wood fiber in 10% ammonia water solution for 30min, filtering, washing and drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711119096.3A CN107663067B (en) | 2017-11-14 | 2017-11-14 | Anti-crack mortar |
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|---|---|---|---|
| CN201711119096.3A CN107663067B (en) | 2017-11-14 | 2017-11-14 | Anti-crack mortar |
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| CN107663067A CN107663067A (en) | 2018-02-06 |
| CN107663067B true CN107663067B (en) | 2020-05-15 |
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Effective date of registration: 20200420 Address after: 712000 north of Xianxing Road, Qindu District, Xianyang City, Shaanxi Province, 100m east of Maoling intersection Applicant after: Xianyang Hengding Commercial Concrete Co.,Ltd. Address before: 233000 Anhui Province, Bengbu City Industrial Park Road No. 60 Yu Yuhui District Applicant before: ANHUI SHENZHOU BUILDING MATERIAL TECHNOLOGY Co.,Ltd. |
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