CN114180897A - Premixed mortar for green building and construction method - Google Patents
Premixed mortar for green building and construction method Download PDFInfo
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- CN114180897A CN114180897A CN202111361175.1A CN202111361175A CN114180897A CN 114180897 A CN114180897 A CN 114180897A CN 202111361175 A CN202111361175 A CN 202111361175A CN 114180897 A CN114180897 A CN 114180897A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The application relates to the technical field of building construction, and particularly discloses ready-mixed mortar for a green building and a construction method. The green building ready-mixed mortar is prepared from the following raw materials in parts by weight: 90-120 parts of cement, 18-30 parts of slag powder, 45-90 parts of fly ash, 5-10 parts of a composite exciting agent, 3-9 parts of hydroxypropyl methyl cellulose ether, 5-15 parts of a water reducing agent, 15-35 parts of hemp fiber, 48-90 parts of waste aggregate and 80-120 parts of water; the preparation method comprises the following steps: the method comprises the steps of firstly, uniformly mixing slag powder, coal ash and a composite activator to obtain a first mixed material, uniformly mixing other raw materials of the decoking fibrilia to obtain a second mixed material, uniformly mixing the first mixed material, the second mixed material and the decoking fibrilia to obtain the ready-mixed mortar, and constructing. The green building ready-mixed mortar has the advantage of improving the strength through the synergistic effect of the raw materials.
Description
Technical Field
The application relates to the technical field of building construction, in particular to ready-mixed mortar for green buildings and a construction method.
Background
The green building is a building which can save resources to the maximum extent in the whole life cycle of the building, including energy saving, land saving, water saving, material saving and the like, protect the environment, reduce pollution, provide healthy, comfortable and efficient use space for people and harmoniously live with the nature. The green building technology focuses on low consumption, high efficiency, economy and environmental protection, is benefit sharing between people and nature, and between the present and the future, and is a sustainable development building means.
In order to implement the concept of green buildings, the environment is saved, the field mortar stirring is gradually forbidden in many cities, and the ready-mixed mortar is popularized and used. The ready-mixed mortar is prepared by stirring in advance, is produced by specialized manufacturers and is used for various mortar mixtures in construction engineering. The ready-mixed mortar has the characteristics of health, environmental protection, stable quality, energy conservation, comfort and the like.
At present, when the premixed mortar is used for pouring a large area, hydration of cement can generate a large amount of heat, the dissipation of external heat is fast, internal heat is not easy to dissipate, a large temperature difference is formed inside and outside, and when the mortar is solidified, cracks can be generated to influence the strength of the mortar.
Disclosure of Invention
The application provides a green building ready-mixed mortar and a construction method for improving the strength of the ready-mixed mortar.
In a first aspect, the application provides a ready-mixed mortar for green buildings, which adopts the following technical scheme:
the green ready-mixed mortar for the building is prepared from the following raw materials in parts by weight: 90-120 parts of cement, 18-30 parts of slag powder, 45-90 parts of fly ash, 5-10 parts of a composite exciting agent, 3-9 parts of hydroxypropyl methyl cellulose ether, 5-15 parts of a water reducing agent, 15-35 parts of hemp fiber, 48-90 parts of waste aggregate and 80-120 parts of water.
By adopting the technical scheme, the ready-mixed mortar has good compressive strength, bending strength and crack resistance through the synergistic effect of the raw materials, wherein the cracking index is 3-8%, the 28d compressive strength is 26.6-40.9MPa, and the flexural strength is 1.15-2.25 MPa.
The cement and the water reducing agent are conventional materials of the ready-mixed mortar. The slag powder is a byproduct in the blast furnace ironmaking process, has a loose and porous structure, can improve the fluidity of cement, reduce the hydration heat of the cement, improve the internal structure of the cement and further increase the strength of mortar. The fly ash can reduce the using amount of cement, improve the workability of the cement, fill gaps among raw materials, improve the compactness and the durability and enhance the cohesiveness. When the cement covers the fly ash, the volcanic ash effect can be exerted, so that the firmness between the fly ash and the cement is enhanced, and the strength of the mortar is enhanced. Fly ash contains relatively many vitreous granules, which contain a large amount of soluble oxides. The composite excitant can react with calcium hydroxide in cement to produce calcium silicate crystal, fill cement gap, excite the volcanic ash effect of flyash and promote the hydration of cement, so as to raise the strength of mortar.
The hydroxypropyl methyl cellulose ether has high water-retaining property, can fully hydrate cement, enhances the bonding strength among raw materials, and further enhances the strength of mortar. The hydroxypropyl methyl cellulose ether can also reduce the phenomena of cracks and dehydration of the cement caused by too fast dehydration, has good fluidity and can enhance the crack resistance of the mortar. The hemp fiber as natural plant fiber has the features of being slender, light and tough, and is not easy to rot after being soaked in water. The coke fibrilia has certain toughness, is in a three-dimensional disorderly distributed net structure in the mortar, plays a role in supporting, can reduce crack propagation, and improves mechanical properties. When the mortar is applied to the raw materials of the mortar, the mortar can be better dispersed in gaps in cement, the bonding property with the cement is improved, and the breaking strength of the cement is improved. The waste aggregate not only can recycle waste materials, save resources and protect the environment, but also can replace part of cement, save cost, and can replace sand and stone to play a role in enhancing the strength of mortar.
Preferably, the feed additive is prepared from the following raw materials in parts by weight: 100-110 parts of cement, 22-28 parts of slag powder, 60-78 parts of fly ash, 6-8 parts of composite exciting agent, 5-8 parts of hydroxypropyl methyl cellulose ether, 8-12 parts of water reducing agent, 20-30 parts of hemp fiber, 63-81 parts of waste aggregate and 90-110 parts of water.
By adopting the technical scheme, the mixing amount of cement, slag powder, fly ash, a composite exciting agent, hydroxypropyl methyl cellulose ether, a water reducing agent, hemp-burnt fiber, waste aggregate and water is optimized, so that the strength of the mortar can be improved.
Preferably, the weight ratio of the slag powder to the fly ash is 1: (2.5-3).
By adopting the technical scheme, although the fly ash can promote the hydration of cement, the chemical activity of the fly ash is relatively low, and the early strength of concrete is greatly influenced under the condition of high doping amount. The slag powder has high chemical activity and strong hydration performance, and the volcanic ash activity effect can be improved and the chemical interaction and the induced excitation action among particles in a system can be increased after the fly ash is compounded with the slag powder. Meanwhile, the filling of the fine powder particles in gaps in the cement can be promoted, so that the cement particles are dispersed, and the compactness and the flowability of the cement are improved. The strength of the mortar can be improved through the synergistic effect between the slag powder and the fly ash. And when the mixing amount of the slag powder is higher and the mixing amount of the fly ash is reduced, the volcanic ash effect of the fly ash can be reduced, the hydration of cement is slowed down, and the influence on the strength of the mortar is small. Within the above range, the strength of the mortar is optimized.
Preferably, the composite exciting agent is prepared from potassium hydroxide, sodium hydroxide, potassium silicate and water, and the weight ratio of the potassium hydroxide to the sodium hydroxide to the potassium silicate to the water is 1: (0.6-0.8): (1.2-1.5): (4-6).
By adopting the technical scheme, the potassium silicate solution contains more silicate ions, and a large number of silicate ions and silicon-oxygen tetrahedrons are easy to generate polymerization reaction under the compound excitation condition of the alkali solution, so that the strength of the polymer is obviously improved. Moreover, the silicate solution contains partially oligomeric soluble silicon complexes, and the oligomeric complexes mostly exist in a free state, so when the aluminum-silicon oligomers in the fly ash and the slag powder are dissolved and released, the free oligomeric soluble silicon complexes are subjected to polymerization reaction to generate gel products, and the strength of the mortar is improved. In addition, in the presence of potassium ions, the radius of the potassium ions is larger than that of sodium ions in the reaction process, so that silicon-oxygen bonds are more easily broken by the potassium ions, silicon-oxygen complexes dissolved and released from the surfaces of the fly ash and the mineral powder are increased, gel products generated by the reaction are also increased, and the strength of the mortar is improved.
Preferably, the water reducing agent is a polycarboxylic acid water reducing agent.
By adopting the technical scheme, the polycarboxylate superplasticizer can improve the workability, play a plasticizing role, reduce the cement content, reduce the production cost and enhance the strength of mortar. The polycarboxylate superplasticizer can reduce the generation of an interface on a structure by improving the setting time and the working performance of the mortar, improve the structural strength and enable the mortar to work at high temperature.
Preferably, the length of the hemp fiber is 12-15mm, and the diameter is 0.8-1.2 mm.
By adopting the technical scheme, the hemp fibers are easy to disperse in the upper range and can be better fused with other raw materials. The coke hemp fiber can not be wound and knotted due to overlong, so that the stability of the interior of the mortar is not influenced; the mortar is not easy to disperse due to too short self agglomeration, the fluidity of raw materials is not influenced in the preparation process, and a three-dimensional network structure is more favorably formed in the mortar, so that the strength of the mortar is better.
Preferably, the pyro-hemp fiber is modified pyro-hemp fiber modified by magnesium oxide, potassium dihydrogen phosphate and vinyl acetate-vinyl versatate copolymer emulsion.
By adopting the technical scheme, the coke hemp fiber can not be well adhered with other raw materials in the cement. The vinyl acetate-versatic acid ethylene copolymer emulsion has good compatibility with cement, and the vinyl acetate-versatic acid ethylene copolymer emulsion has good permeability to fibers, so that the shear strength can be improved, and the adhesive property between the coke hemp fibers and various raw materials can be improved. The burnt fibrilia can be bonded with other raw materials by modifying the burnt fibrilia by using the magnesium oxide, the monopotassium phosphate and the vinyl acetate-versatic acid ethylene copolymer emulsion, so that the burnt fibrilia is better filled in gaps of the raw materials, and the strength of the mortar is favorably enhanced.
Preferably, the waste aggregate is prepared from waste asphalt slag and waste ceramic particles, and the weight ratio of the waste asphalt slag to the waste ceramic particles is 1: (0.6-0.8).
By adopting the technical scheme, the waste aggregate is prepared from the waste asphalt slag and the waste ceramic particles, so that the waste utilization can be realized, the resources are saved, the cost is reduced, the environmental pollution is reduced, and the strength of the mortar can be enhanced.
Preferably, the average particle size of the waste asphalt slag is 4.75-9.5mm, and the average particle size of the waste ceramic particles is 1-2.5 mm.
Through adopting above-mentioned technical scheme, further inject the particle diameter of useless pitch sediment, useless ceramic granule, can make the more even of useless pitch sediment and useless ceramic granule mixture. Through the cooperation with other raw materials, can fill the space between the cement, do benefit to the intensity that strengthens the mortar.
In a second aspect, the application provides a construction method of ready-mixed mortar for green buildings, which adopts the following technical scheme: a construction method of ready-mixed mortar for green buildings comprises the following steps:
s1: mixing slag powder, fly ash and a composite activator, and uniformly stirring to obtain a first mixed material;
s2: mixing cement, waste aggregate, water, hydroxypropyl methyl cellulose ether and a water reducing agent, and uniformly stirring to obtain a second mixed material;
s3: mixing the first mixed material, the second mixed material and the coke fibrilia, and uniformly stirring to obtain ready-mixed mortar;
s4: and (3) coating the premixed mortar on the top surface and the bottom surface of the building block, and then building block by block to form the building.
By adopting the technical scheme, the slag powder, the fly ash and the composite activator are mixed to form a first mixed material, the chemical activity of the fly ash can be excited firstly, then the cement, the waste aggregate, the water, the hydroxypropyl methyl cellulose ether and the water reducing agent are mixed, and then the first mixed material is mixed, so that the hydration action of the cement is promoted better, the hemp fiber is added, the mixing of the hemp fiber and other raw materials is more uniform, and the strength of the mortar is further enhanced. The premixed mortar is prepared, and finally the premixed mortar is used for building a building, so that the building blocks can be bonded better and can be built conveniently.
In summary, the present application has the following beneficial effects:
1. because the slag powder, the fly ash and the composite excitant are adopted in the mortar, the consumption of cement can be reduced, the production cost is reduced, the activity of the fly ash can be improved, the strength of the mortar is further improved, the 28d compressive strength of the mortar can reach 40.9MPa, and the cracking index reaches 3%.
2. The modified coke fibrilia is preferably adopted, the coke fibrilia is a plant fiber and has certain toughness and water resistance, the bonding property between the coke fibrilia and other raw materials is enhanced by modifying the coke fibrilia, the dispersion of the coke fibrilia in the mortar is more uniform, the strength and the crack resistance of the mortar are improved, and the breaking strength of the mortar can reach 2.25 MPa.
3. Preferentially adopt waste aggregate in this application, not only realized the waste utilization of waste asphalt sediment and waste ceramic granule, reduce cost reduces environmental pollution, still through with the synergistic effect between other raw materials, strengthened the compressive strength and the rupture strength of mortar.
Detailed Description
The present application will be described in further detail with reference to examples.
Raw materials
The strength grade of the cement is 42.5, and the cement is selected from great-Lianzhong Xin constructional engineering materials Co; the slag powder is S95 grade and is selected from Tangshan Industrial building materials Co; the fly ash is first grade and is selected from Hebei-Ore mineral products Co.Ltd; the hydroxypropyl methyl cellulose ether is selected from Hebei Yanxing chemical Co., Ltd; the burnt hemp fiber is selected from Feiteng hemp products factories in Tan city; the polycarboxylate superplasticizer is selected from Shandong quansheng chemical science and technology limited company; the magnesium oxide is selected from Yingkongxing North refractory materials Co.Ltd; the potassium dihydrogen phosphate is selected from Jinan Shih chemical Co., Ltd; the waste asphalt slag is selected from eight-source energy-saving and environment-friendly building materials Co, Ltd; the waste ceramics are selected from the group consisting of Chuhong ceramics, Inc. of Yixing.
Preparation example
Preparation example 1
A composite excitant is prepared by adopting the following method:
mixing 1kg potassium hydroxide, 0.6kg sodium hydroxide, and 1.2kg potassium silicate in 4kg water, and stirring for 30min to obtain compound activator.
Preparation example 2
A compound activator was prepared in exactly the same manner as in preparation example 1 except that 0.7kg of sodium hydroxide was used and the rest was the same as in preparation example 1.
Preparation example 3
A compound activator was prepared in exactly the same manner as in preparation example 1 except that 0.8kg of sodium hydroxide was used and the rest was the same as in preparation example 1.
Preparation example 4
A composite activator was prepared in exactly the same manner as in preparation example 2 except that 1.25kg of potassium silicate was used and the remainder was the same as in preparation example 2.
Preparation example 5
A composite activator was prepared in exactly the same manner as in preparation example 2 except that 1.5kg of potassium silicate was used and the remainder was the same as in preparation example 2.
Preparation example 6
A composite activator was prepared in the same manner as in preparation example 4 except that 1kg of sodium hydroxide and 0.8kg of potassium silicate were used.
Preparation example 7
A modified pyroxylin fiber is prepared by the following steps:
putting 33kg of magnesium oxide and 18kg of potassium dihydrogen phosphate into 60kg of water, stirring for 45min to form a mixed solution, then putting the coke fibrilia into the mixed solution, soaking for 2h, taking out, drying for 30min, spraying 5kg of vinyl acetate-vinyl versatate copolymer emulsion on the surface of the coke fibrilia, and drying for 30min again to prepare the modified coke fibrilia.
Examples
TABLE 1 amount of each raw material (unit: kg) of the ready-mixed mortar in examples 1 to 5
Example 1
The raw material proportion of the green ready-mixed mortar for the building is shown in table 1.
Wherein, the composite exciting agent is prepared by the preparation example 1, the length of the hemp fiber is 12mm, the diameter is 0.8mm, the average grain diameter of the waste asphalt slag is 4.75mm, and the average grain diameter of the waste ceramic particles is 1 mm.
A construction method of ready-mixed mortar for green buildings comprises the following steps:
s1: mixing slag powder, fly ash and a composite activator, and stirring for 30min to obtain a first mixed material;
s2: mixing cement, waste aggregate, water, hydroxypropyl methyl cellulose ether and a water reducing agent, and stirring for 40min to obtain a second mixed material;
s3: mixing the first mixed material, the second mixed material and the coke fibrilia, and stirring for 45min to obtain ready-mixed mortar;
s4: and (3) coating the premixed mortar on the top surface and the bottom surface of the building block, and then building block by block to form the building.
Examples 2 to 5
The green ready-mixed mortar for buildings is different from the ready-mixed mortar in the raw material ratio shown in the table 1, and the difference between the ready-mixed mortar and the embodiment 1 is that the raw material ratio is different.
TABLE 2 amount of each raw material (unit: kg) of the ready-mixed mortar in examples 6 to 9
Examples 6 to 9
The green ready-mixed mortar for buildings is different from the ready-mixed mortar in the raw material ratio of the ready-mixed mortar in example 3, and the raw material ratio is shown in table 2.
TABLE 3 amount of each raw material (unit: kg) of the ready-mixed mortar in examples 10 to 13
Examples 10 to 13
The green ready-mixed mortar for buildings is different from the ready-mixed mortar of example 8 in the raw material ratio shown in table 3.
Example 14
A green construction ready-mixed mortar, which is different from the mortar prepared in example 12 in the source of the composite activator in the raw materials of the ready-mixed mortar, and which was prepared in preparation example 2.
Example 15
A green construction ready-mixed mortar, which is different from example 12 in the source of the composite activator in the raw material of the ready-mixed mortar, and which was prepared by using preparation example 3.
Example 16
A green construction ready-mixed mortar, which is different from the mortar prepared in example 12 in the source of the composite activator in the raw materials of the ready-mixed mortar, and which was prepared in preparation example 4.
Example 17
A green construction ready-mixed mortar, which is different from example 12 in the source of the composite activator in the raw material of the ready-mixed mortar, and which was prepared by using preparation example 5.
Example 18
A green construction ready-mixed mortar, which is different from example 12 in the source of the composite activator in the raw material of the ready-mixed mortar, and which was prepared by using preparation example 6.
Example 19
A green construction ready-mixed mortar differing from example 16 in that the length of the kenaf fiber in the raw material of the ready-mixed mortar was 13mm and the diameter was 1.0 mm.
Example 20
A green construction ready-mixed mortar differing from example 16 in that the length of the kenaf fiber in the raw material of the ready-mixed mortar was 15mm and the diameter was 1.2 mm.
Example 21
A green construction ready-mixed mortar differing from example 16 in that the length of the kenaf fiber in the raw material of the ready-mixed mortar was 6mm and the diameter was 0.5 mm.
Example 22
A green construction ready-mixed mortar differing from example 16 in that the length of the kenaf fiber in the raw material of the ready-mixed mortar was 20mm and the diameter was 2 mm.
Example 23
A green construction ready-mixed mortar differing from example 20 in that the average particle size of waste asphalt slag in the raw material of the ready-mixed mortar was 6.5mm and the average particle size of waste ceramic particles was 1.5 mm.
Example 24
A green construction ready-mixed mortar differing from example 20 in that the average particle size of waste asphalt slag in the raw material of the ready-mixed mortar was 9.5mm and the average particle size of waste ceramic particles was 2.5 mm.
Example 25
A green construction ready-mixed mortar differing from example 20 in that the average particle size of waste asphalt slag in the raw material of the ready-mixed mortar was 1.8mm and the average particle size of waste ceramic particles was 5.5 mm.
Example 26
A green construction ready-mixed mortar differing from example 24 in that the modified kenaf fiber was used in place of the kenaf fiber in the same amount as in preparation example 7.
Comparative example
Comparative example 1
The green ready-mixed mortar for buildings is different from the embodiment 1 in that the compound excitant is replaced by sodium hydroxide in the raw material of the green ready-mixed mortar in equal amount.
Comparative example 2
The green ready-mixed mortar for buildings is different from the embodiment 1 in that the compound excitant is replaced by potassium hydroxide in the raw material of the green ready-mixed mortar in equal amount.
Comparative example 3
The green ready-mixed mortar for construction is different from the embodiment 1 in that the amount of the composite activator is replaced by potassium silicate in the raw material of the green ready-mixed mortar.
Comparative example 4
The green ready-mixed mortar for buildings is different from the embodiment 1 in that a compound activator is not added to the raw materials of the green ready-mixed mortar.
Comparative example 5
A green construction ready-mixed mortar, which is different from example 1 in that the amount of waste aggregate in the raw material of the ready-mixed mortar is changed to the same amount of stones as the average particle size.
Performance test
The following performance tests were carried out on a portion of the ready-mixed mortars obtained in examples 1 to 26 and comparative examples 1 to 5:
and (3) crack resistance: the cracking index of the ready-mixed mortar is detected according to GB/T29417-2012 test method for drying shrinkage cracking performance of cement mortar and concrete, and the detection result is shown in Table 4.
Breaking strength: the flexural strength of the ready-mixed mortar is detected according to GB/T50081-2002 Standard for testing mechanical properties of ordinary concrete, and the detection results are shown in Table 4.
Compressive strength: the 28d compressive strength of the ready-mixed mortar is detected according to GB/T50081-2002 Standard test method for mechanical properties of ordinary concrete, and the detection results are shown in Table 4.
TABLE 4 test results
As can be seen from Table 4, the premixed mortar of the present application has better crack resistance, compressive strength and flexural strength through the synergistic effect of the raw materials, wherein the crack index is 3-8%, the 28d compressive strength is 26.6-40.9MPa, and the flexural strength is 1.15-2.25 MPa.
As can be seen by combining the example 1 and the comparative examples 1 to 4, the cracking index of the example 1 is 5%, the compressive strength is 28.7MPa, and the flexural strength is 1.34MPa, which are all superior to those of the comparative examples 1 to 4, and the mortar has better compressive strength and flexural strength by adopting the composite exciting agent and the synergistic action among the sodium hydroxide solution, the potassium hydroxide solution and the potassium silicate solution.
As can be seen by combining example 1 and comparative example 5, the crack index of example 1 is 5%, the compressive strength is 28.7MPa, and the flexural strength is 1.34MPa, which is superior to that of comparative example 5, indicating that the compressive strength and the flexural strength of the mortar can be enhanced by using the waste aggregate.
As can be seen by combining examples 1-5, the cracking index of example 3 is 5%, the compressive strength is 32.8MPa, and the flexural strength is 1.44MPa, which are all better than those of examples 1, 2, 4, and 5, and the weight parts of the composite exciting agent in example 3 are more appropriate, so that the mortar can show better cracking resistance, compressive strength and flexural strength.
As can be seen by combining examples 6-9, the cracking index of example 8 is 5%, the compressive strength is 35.8MPa, and the flexural strength is 1.5MPa, which are all better than those of examples 6, 7, and 8, and the slag powder and the fly ash in example 8 are more appropriate in weight portion, and show better compressive strength and flexural strength.
As can be seen by combining examples 10-13, example 12 has a cracking index of 5%, a compressive strength of 37.0MPa and a flexural strength of 1.59MPa, which are superior to those of examples 10, 11 and 13, indicating that the weight parts of the waste asphalt slag and the waste ceramic particles in example 12 are more suitable, and the mortar can show superior cracking resistance, compressive strength and flexural strength.
As can be seen by combining the examples 14 to 18, the cracking index of the example 16 is 5%, the compressive strength is 39.2MPa, and the flexural strength is 1.83MPa, which are all better than the examples 14 to 15 and 17 to 18, and the compound excitant is more suitable to be prepared by the preparation example 4, so that the mortar shows better cracking resistance, compressive strength and flexural strength.
In combination with examples 19-22, it can be seen that example 20 has a cracking index of 5%, a compressive strength of 40.3MPa, and a flexural strength of 1.98MPa, which are superior to examples 19, 21, and 22, indicating that the length of the hemp fiber is more suitable for 15mm, so that the mortar shows superior crack resistance, compressive strength, and flexural strength, and the too long or too short length of the hemp fiber affects the strength of the mortar.
As can be seen by combining examples 23 to 25, example 24, which is superior to examples 23 and 25 in the cracking index of 5%, compressive strength of 39.9MPa and flexural strength of 2.13MPa, shows that the average particle size of the waste asphalt slag is 9.5mm, and the average particle size of the waste ceramic particles is preferably 2.5mm, so that the mortar exhibits superior cracking resistance, compressive strength and flexural strength, and the average particle size of the waste asphalt slag is 4.75 to 9.5mm and the average particle size of the waste ceramic particles is 1 to 2.5mm, within the above range, the strength of the mortar is superior.
Combining example 24 and example 26, it can be seen that example 26 has a cracking index of 3%, a compressive strength of 40.9MPa, and a flexural strength of 2.25MPa, which are superior to example 24, indicating that the crack resistance, compressive strength, and flexural strength of the mortar are improved after the pyro-hemp fibers are modified.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The ready-mixed mortar for the green building is characterized by comprising the following components in parts by weight: the feed is prepared from the following raw materials in parts by weight: 90-120 parts of cement, 18-30 parts of slag powder, 45-90 parts of fly ash, 5-10 parts of a composite exciting agent, 3-9 parts of hydroxypropyl methyl cellulose ether, 5-15 parts of a water reducing agent, 15-35 parts of hemp fiber, 48-90 parts of waste aggregate and 80-120 parts of water.
2. The ready-mixed mortar for green buildings according to claim 1, which is characterized in that: the feed is prepared from the following raw materials in parts by weight: 100-110 parts of cement, 22-28 parts of slag powder, 60-78 parts of fly ash, 6-8 parts of composite exciting agent, 5-8 parts of hydroxypropyl methyl cellulose ether, 8-12 parts of water reducing agent, 20-30 parts of hemp fiber, 63-81 parts of waste aggregate and 90-110 parts of water.
3. The ready-mixed mortar for green buildings according to claim 1, which is characterized in that: the weight ratio of the slag powder to the fly ash is 1: (2.5-3).
4. The ready-mixed mortar for green buildings according to claim 1, which is characterized in that: the composite excitant is prepared from potassium hydroxide, sodium hydroxide, potassium silicate and water, wherein the weight ratio of potassium hydroxide to sodium hydroxide to potassium silicate to water is 1: (0.6-0.8): (1.2-1.5): (4-6).
5. The ready-mixed mortar for green buildings according to claim 1, which is characterized in that: the water reducing agent is a polycarboxylic acid water reducing agent.
6. The ready-mixed mortar for green buildings according to claim 1, which is characterized in that: the length of the hemp fiber is 12-15mm, and the diameter is 0.8-1.2 mm.
7. The ready-mixed mortar for green buildings according to claim 6, which is characterized in that: the pyro-hemp fiber is modified pyro-hemp fiber modified by magnesium oxide, potassium dihydrogen phosphate and vinyl acetate-versatic acid ethylene copolymer emulsion.
8. The ready-mixed mortar for green buildings according to claim 1, which is characterized in that: the waste aggregate is prepared from waste asphalt slag and waste ceramic particles, and the weight ratio of the waste asphalt slag to the waste ceramic particles is 1: (0.6-0.8).
9. The ready-mixed mortar for green buildings according to claim 8, which is characterized in that: the average grain diameter of the waste asphalt slag is 4.75-9.5mm, and the average grain diameter of the waste ceramic particles is 1-2.5 mm.
10. The construction method of the ready-mixed mortar for green buildings according to claims 1 to 9, characterized by comprising the following steps:
s1: mixing slag powder, fly ash and a composite activator, and uniformly stirring to obtain a first mixed material;
s2: mixing cement, waste aggregate, water, hydroxypropyl methyl cellulose ether and a water reducing agent, and uniformly stirring to obtain a second mixed material;
s3: mixing the first mixed material, the second mixed material and the coke fibrilia, and uniformly stirring to obtain ready-mixed mortar;
s4: and (3) coating the premixed mortar on the top surface and the bottom surface of the building block, and then building block by block to form the building.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114751698A (en) * | 2022-04-25 | 2022-07-15 | 广东雍晟建筑工程有限公司 | Premixed mortar for green building construction |
| CN116535145A (en) * | 2023-05-17 | 2023-08-04 | 常州华光建材科技有限公司 | Premixed building mortar fully utilizing solid waste |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008031007A (en) * | 2006-07-31 | 2008-02-14 | Denki Kagaku Kogyo Kk | Mortar or concrete composition |
| KR101536308B1 (en) * | 2015-03-25 | 2015-07-13 | 장영수 | Remicon composition using construction waste |
| CN106007562A (en) * | 2016-05-19 | 2016-10-12 | 四川震强绿舍建材有限公司 | Dry-mixed mortar prepared from construction waste recycled aggregate and preparation method of dry-mixed mortar |
| CN107777981A (en) * | 2017-11-02 | 2018-03-09 | 广东工业大学 | A kind of regeneration concrete and preparation method thereof |
| CN111454024A (en) * | 2020-05-29 | 2020-07-28 | 西安高科新达混凝土有限责任公司 | Sulfate-resistant concrete and preparation method thereof |
| CN112159169A (en) * | 2020-09-09 | 2021-01-01 | 馆陶县晴美环保科技有限公司 | Waterproof mortar and preparation method thereof |
| CN112552000A (en) * | 2020-12-07 | 2021-03-26 | 绵竹市铸诚混凝土有限公司 | Surface wear-resistant hydrophobic enhanced self-leveling mortar and preparation method thereof |
| CN113045274A (en) * | 2021-03-24 | 2021-06-29 | 陕西沣东新城混凝土有限责任公司 | C30 concrete and preparation method thereof |
-
2021
- 2021-11-17 CN CN202111361175.1A patent/CN114180897A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008031007A (en) * | 2006-07-31 | 2008-02-14 | Denki Kagaku Kogyo Kk | Mortar or concrete composition |
| KR101536308B1 (en) * | 2015-03-25 | 2015-07-13 | 장영수 | Remicon composition using construction waste |
| CN106007562A (en) * | 2016-05-19 | 2016-10-12 | 四川震强绿舍建材有限公司 | Dry-mixed mortar prepared from construction waste recycled aggregate and preparation method of dry-mixed mortar |
| CN107777981A (en) * | 2017-11-02 | 2018-03-09 | 广东工业大学 | A kind of regeneration concrete and preparation method thereof |
| CN111454024A (en) * | 2020-05-29 | 2020-07-28 | 西安高科新达混凝土有限责任公司 | Sulfate-resistant concrete and preparation method thereof |
| CN112159169A (en) * | 2020-09-09 | 2021-01-01 | 馆陶县晴美环保科技有限公司 | Waterproof mortar and preparation method thereof |
| CN112552000A (en) * | 2020-12-07 | 2021-03-26 | 绵竹市铸诚混凝土有限公司 | Surface wear-resistant hydrophobic enhanced self-leveling mortar and preparation method thereof |
| CN113045274A (en) * | 2021-03-24 | 2021-06-29 | 陕西沣东新城混凝土有限责任公司 | C30 concrete and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114751698A (en) * | 2022-04-25 | 2022-07-15 | 广东雍晟建筑工程有限公司 | Premixed mortar for green building construction |
| CN116535145A (en) * | 2023-05-17 | 2023-08-04 | 常州华光建材科技有限公司 | Premixed building mortar fully utilizing solid waste |
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