CN109231944B - Premixed mortar for green building and green construction method thereof - Google Patents
Premixed mortar for green building and green construction method thereof Download PDFInfo
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- CN109231944B CN109231944B CN201811132961.2A CN201811132961A CN109231944B CN 109231944 B CN109231944 B CN 109231944B CN 201811132961 A CN201811132961 A CN 201811132961A CN 109231944 B CN109231944 B CN 109231944B
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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
- C04B28/14—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 calcium sulfate cements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a premixed mortar for green buildings and a green construction method thereof. The construction method of the ready-mixed mortar comprises the working procedures of mixing ingredients, sampling and detecting, absorbing and transporting and adding water for stirring. The ready-mixed mortar has reasonable component design, the prepared concrete has good adhesive force and strong adaptability of temperature difference, the temperature difference between the interior of the concrete and the surface layer is small during the curing period of the concrete, and the concrete is not easy to crack, thereby ensuring the durability of the engineering. The construction method can realize integration of pulping, detection, conveying, pouring and remote control, optimizes the construction scheme, is beneficial to improving the construction efficiency, is not easy to generate a large amount of dust during construction, and in addition, the ready-mixed mortar reasonably utilizes colored slag, changes waste into valuable, saves energy and protects environment.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to premixed mortar for a green building and a green construction method thereof.
Background
The green building refers to a building which can save resources to the maximum extent within the whole life cycle of the building, comprises the functions of saving energy, land, water, materials and the like, protects the environment, reduces pollution, provides healthy, comfortable and efficient use space for people, and is harmonious with the nature. The green building technology focuses on low consumption, high efficiency, economy, environmental protection, integration and optimization, is benefit sharing between people and nature, the present and the future, and is a construction means of sustainable development.
At present, in consideration of energy conservation and environmental protection, in many cities, on-site mortar stirring is gradually forbidden, and premixed mortar is popularized and used. The ready-mixed mortar has the advantages of health, environmental protection, stable quality, energy conservation, comfort and the like. During the process of large-area pouring of the ready-mixed mortar, due to the fact that great heat is generated under the action of cement hydration heat, surface heat is dissipated quickly, internal heat is not easy to dissipate, and therefore a great temperature difference is generated between the inside and the surface. When the temperature difference exceeds a certain critical value, temperature stress can be generated, and when the temperature tensile stress is greater than the tensile strength of the mortar, cracks can be generated in the mortar structure, so that the durability of engineering is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a green ready-mixed mortar for buildings and a green construction method thereof, and the specific technical scheme is as follows:
the green ready-mixed mortar for the building comprises the following raw materials in parts by weight: 100-120 parts of cement, 15-20 parts of thickening powder, 20-30 parts of colored slag, 5-6 parts of methyl cellulose ether, 0.8-1.2 parts of water reducing agent, 6-10 parts of gypsum and 50-60 parts of slow-release heat absorbent.
As an improvement of the technical scheme, the water reducing agent is one of polycarboxylic acid and sodium dodecyl sulfate.
As an improvement of the technical scheme, the particle size of the colored slag is 2-4.75 mm.
As an improvement of the above technical scheme, the preparation method of the slow-release heat absorbent comprises the following steps: mixing and stirring 100 parts by mass of potassium nitrate, 120-150 parts by mass of attapulgite and 50-60 parts by mass of water glass uniformly to obtain a wool, feeding the wool into a sintering furnace, sintering at the temperature of 310-320 ℃, and crushing by using a crusher to obtain the slow-release heat absorbing agent.
As an improvement of the technical scheme, the particle size of the slow-release heat absorbent is 0.25-0.5 mm.
As an improvement of the technical scheme, the particle size of the attapulgite is less than or equal to 0.25 mm.
A green construction method of ready-mixed mortar for green buildings comprises the following steps:
step one, mixing ingredients
Weighing cement, thickening powder, colored slag, methyl cellulose ether, a water reducing agent, gypsum and a slow-release heat absorbent according to the formula ratio, adding the raw materials into a high-speed stirrer according to the formula ratio, starting a stirring motor, and forcibly controlling to obtain ready-mixed mortar;
step two, sampling detection
Randomly sampling the ready-mixed mortar obtained in the step one, sending the sample to a sample curing room, detecting in a laboratory, and sending a qualified command to a central control room after the sample is qualified;
step three, material suction and transportation
After receiving the sample sampling qualified signal, the central control room transmits the signal to a discharge valve in the high-speed mixer through a wired network or a wireless network, the discharge valve receives the signal and starts discharging, and a vacuum suction machine is adopted for sucking materials during discharging; during material suction operation, a flowmeter is adopted for metering and conveying to a transport vehicle, and the ready-mixed mortar is conveyed to a designated construction site through the transport vehicle;
step four, adding water and stirring for construction
And conveying the premixed mortar in the transport vehicle into a mortar collecting hopper for temporary storage, conveying the premixed mortar into a forced mixer through a closed feeding system, and adding water into the forced mixer for stirring to obtain the mortar meeting the construction requirements.
The invention has the beneficial effects that: the ready-mixed mortar has reasonable component design, the prepared concrete has good adhesive force and strong adaptability of temperature difference, the temperature difference between the interior of the ready-mixed mortar and the surface layer is small during the concrete curing period, and the concrete is not easy to crack, thereby ensuring the durability of the engineering. The construction method provided by the invention can realize integration of pulping, detection, conveying, pouring and remote control, optimizes the construction scheme, is beneficial to improving the construction efficiency, is not easy to generate a large amount of dust during construction, and in addition, the ready-mixed mortar reasonably utilizes colored slag, changes waste into valuable, saves energy and is environment-friendly.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
100Kg of potassium nitrate, 150Kg of attapulgite with the particle size of less than or equal to 0.25mm and 60Kg of water glass are mixed and stirred uniformly to obtain a wool, the wool is sent into a sintering furnace, sintering is carried out at the temperature of 310-320 ℃, and then a crusher is used for crushing to obtain the slow-release heat absorbent, wherein the particle size of the slow-release heat absorbent is 0.25-0.5 mm.
Adding 120Kg of cement, 20Kg of thickening powder, 30Kg of colored slag, 6Kg of methyl cellulose ether, 1.2Kg of water reducing agent, 10Kg of gypsum and 60Kg of slow-release heat absorbent into a high-speed stirrer, starting a stirring motor, and forcibly controlling to obtain ready-mixed mortar; wherein the water reducing agent is sodium dodecyl sulfate. The particle size of the colored slag is 2-4.75 mm.
Randomly sampling the ready-mixed mortar, sending the sample to a sample curing room, detecting in a laboratory, and transmitting a qualified command to a central control room after the detection is qualified.
After receiving the sample sampling qualified signal, the central control room transmits the signal to a discharge valve in the high-speed mixer through a wired network or a wireless network, the discharge valve receives the signal and starts discharging, and a vacuum suction machine is adopted for sucking materials during discharging; and during material suction operation, a flowmeter is adopted to measure and convey the material to a transport vehicle, and the premixed mortar is transported to a designated construction site through the transport vehicle.
And conveying the premixed mortar in the transport vehicle into a mortar collecting hopper for temporary storage, conveying the premixed mortar into a forced mixer through a closed feeding system, and adding water into the forced mixer for stirring to obtain the mortar meeting the construction requirements.
According to the requirements of GB/T25181-2010 premixed mortar, the water retention rate of the mortar is detected to be 93.9%, and the compressive strength after 28 days is detected to be 25.3 MPa.
Example 2
100Kg of potassium nitrate, 120Kg of attapulgite with the particle size of less than or equal to 0.25mm and 50Kg of water glass are mixed and stirred uniformly to obtain a wool, the wool is sent into a sintering furnace, sintering is carried out at the temperature of 310-320 ℃, and then a crusher is used for crushing to obtain the slow-release heat absorbent, wherein the particle size of the slow-release heat absorbent is 0.25-0.5 mm.
Adding 100Kg of cement, 15Kg of thickening powder, 20Kg of colored slag, 5Kg of methyl cellulose ether, 0.8Kg of water reducing agent, 6Kg of gypsum and 50Kg of slow-release heat absorbent into a high-speed stirrer, starting a stirring motor, and forcibly controlling to obtain ready-mixed mortar; wherein the water reducing agent is polycarboxylic acid. The particle size of the colored slag is 2-4.75 mm.
Randomly sampling the ready-mixed mortar, sending the sample to a sample curing room, detecting in a laboratory, and transmitting a qualified command to a central control room after the detection is qualified.
After receiving the sample sampling qualified signal, the central control room transmits the signal to a discharge valve in the high-speed mixer through a wired network or a wireless network, the discharge valve receives the signal and starts discharging, and a vacuum suction machine is adopted for sucking materials during discharging; and during material suction operation, a flowmeter is adopted to measure and convey the material to a transport vehicle, and the premixed mortar is transported to a designated construction site through the transport vehicle.
And conveying the premixed mortar in the transport vehicle into a mortar collecting hopper for temporary storage, conveying the premixed mortar into a forced mixer through a closed feeding system, and adding water into the forced mixer for stirring to obtain the mortar meeting the construction requirements.
According to the requirements of GB/T25181-2010 premixed mortar, the water retention rate of the mortar is detected to be 96.1%, and the compressive strength after 28 days is 28.1 MPa.
Example 3
100Kg of potassium nitrate, 130Kg of attapulgite with the particle size of less than or equal to 0.25mm and 56Kg of water glass are mixed and stirred uniformly to obtain a rough material, the rough material is sent into a sintering furnace to be sintered at the temperature of 310-320 ℃, and then a crusher is used for crushing to obtain the slow-release heat absorbent, wherein the particle size of the slow-release heat absorbent is 0.25-0.5 mm.
Adding 110Kg of cement, 18Kg of thickening powder, 26Kg of colored slag, 5.6Kg of methyl cellulose ether, 1Kg of water reducing agent, 8Kg of gypsum and 55Kg of slow-release heat absorbent into a high-speed stirrer, starting a stirring motor, and forcibly controlling to obtain ready-mixed mortar; wherein the water reducing agent is sodium dodecyl sulfate. The particle size of the colored slag is 2-4.75 mm.
Randomly sampling the ready-mixed mortar, sending the sample to a sample curing room, detecting in a laboratory, and transmitting a qualified command to a central control room after the detection is qualified.
After receiving the sample sampling qualified signal, the central control room transmits the signal to a discharge valve in the high-speed mixer through a wired network or a wireless network, the discharge valve receives the signal and starts discharging, and a vacuum suction machine is adopted for sucking materials during discharging; and during material suction operation, a flowmeter is adopted to measure and convey the material to a transport vehicle, and the premixed mortar is transported to a designated construction site through the transport vehicle.
And conveying the premixed mortar in the transport vehicle into a mortar collecting hopper for temporary storage, conveying the premixed mortar into a forced mixer through a closed feeding system, and adding water into the forced mixer for stirring to obtain the mortar meeting the construction requirements.
According to the requirements of GB/T25181-2010 ready-mixed mortar, the water retention rate of the mortar is detected to be 95.3%, and the compressive strength after 28 days is 26.7 MPa.
Experiment 1
The ready-mixed mortar in example 3 was mixed with water to prepare mortar a, and then a cement column a having a diameter of 30cm was prepared, in which a k-type temperature measuring line was embedded in the center of the column a. During the curing of the mortar a into the cement column a, the temperature at the center of the cement column a was measured every 1 hour by a k-type temperature measuring line and recorded as T1.
Experiment 2
Stirring and mixing 110Kg of cement, 18Kg of thickening powder, 26Kg of colored slag, 5.6Kg of methyl cellulose ether, 1Kg of water reducing agent and 8Kg of gypsum to obtain control mortar; and adding water into the control mortar to prepare mortar B, and then preparing a cement column B with the diameter of 30cm, wherein a k-type temperature measuring line is embedded in the center of the cement column. During the curing of the mortar B into the cement column B, the temperature at the center of the cement column B was measured every 1 hour by a k-type temperature measurement line and recorded as T2.
In the above examples, the values of T1 were all lower than the value of T2 for the same curing time; the temperature difference between T1 and T2 is T, and the maximum value of T is 21 ℃ in the first 3 days of maintenance; on the 3 rd to 7 th days of maintenance, the maximum value of t is 17 ℃; on the 7 th to 14 th days of curing, the maximum value of t is 13 ℃. Because the slow-release heat absorbent is not added into the contrast mortar, the heat inside the cement column B is not easy to dissipate during the maintenance period, and the internal temperature is high. In the invention, as the slow-release heat absorbent is added, the slow-release heat absorbent can slowly release potassium nitrate during the curing of the cement column A, and the potassium nitrate can absorb heat when dissolved in water, thereby being beneficial to reducing the temperature inside the cement column A during the curing. The potassium nitrate is dissolved in the water glass and then absorbed by the porous attapulgite, water molecules are lost through sintering, when the attapulgite is sintered, holes in the attapulgite collapse, and the collapsed holes are combined with the sodium silicate to facilitate locking of the potassium nitrate, so that the subsequent slow-release heat absorbent can absorb heat when absorbing water, and slowly release the potassium nitrate, and can still absorb heat after being maintained for 7 days, thereby reducing the temperature in the cement column A, and the cement column A is not easy to crack; meanwhile, the compressive strength of the concrete is not affected by adding the slow-release heat absorbent.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The green ready-mixed mortar for the building is characterized by comprising the following raw materials in parts by weight: 100-120 parts of cement, 15-20 parts of thickening powder, 20-30 parts of colored slag, 5-6 parts of methyl cellulose ether, 0.8-1.2 parts of water reducing agent, 6-10 parts of gypsum and 50-60 parts of slow-release heat absorbent;
the preparation method of the slow-release heat absorbent comprises the following steps: mixing and stirring 100 parts by mass of potassium nitrate, 120-150 parts by mass of attapulgite and 50-60 parts by mass of water glass uniformly to obtain a wool, feeding the wool into a sintering furnace, sintering at the temperature of 310-320 ℃, and crushing by using a crusher to obtain the slow-release heat absorbing agent.
2. The ready-mixed mortar for green buildings according to claim 1, which is characterized in that: the water reducing agent is one of polycarboxylic acid and sodium dodecyl sulfate.
3. The ready-mixed mortar for green buildings according to claim 1, which is characterized in that: the particle size of the colored slag is 2-4.75 mm.
4. The ready-mixed mortar for green buildings according to claim 3, which is characterized in that: the particle size of the slow-release heat absorbent is 0.25-0.5 mm.
5. The ready-mixed mortar for green buildings according to claim 1, which is characterized in that: the particle size of the attapulgite is less than or equal to 0.25 mm.
6. The green construction method of the ready-mixed mortar for green buildings according to any one of claims 1 to 5, characterized by comprising the steps of:
step one, mixing ingredients
Weighing cement, thickening powder, colored slag, methyl cellulose ether, a water reducing agent, gypsum and a slow-release heat absorbent according to the formula ratio, adding the raw materials into a high-speed stirrer according to the formula ratio, starting a stirring motor, and forcibly controlling to obtain ready-mixed mortar;
step two, sampling detection
Randomly sampling the ready-mixed mortar obtained in the step one, sending the sample to a sample curing room, detecting in a laboratory, and sending a qualified command to a central control room after the sample is qualified;
step three, material suction and transportation
After receiving the sample sampling qualified signal, the central control room transmits the signal to a discharge valve in the high-speed mixer through a wired network or a wireless network, the discharge valve receives the signal and starts discharging, and a vacuum suction machine is adopted for sucking materials during discharging; during material suction operation, a flowmeter is adopted for metering and conveying to a transport vehicle, and the ready-mixed mortar is conveyed to a designated construction site through the transport vehicle;
step four, adding water and stirring for construction
And conveying the premixed mortar in the transport vehicle into a mortar collecting hopper for temporary storage, conveying the premixed mortar into a forced mixer through a closed feeding system, and adding water into the forced mixer for stirring to obtain the mortar meeting the construction requirements.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811132961.2A CN109231944B (en) | 2018-09-27 | 2018-09-27 | Premixed mortar for green building and green construction method thereof |
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| CN201811132961.2A CN109231944B (en) | 2018-09-27 | 2018-09-27 | Premixed mortar for green building and green construction method thereof |
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| CN109231944B true CN109231944B (en) | 2021-04-20 |
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| CN109879653B (en) * | 2019-04-19 | 2021-08-24 | 铜陵铜冠建安新型环保建材科技有限公司 | Processing method of high-strength iron tailing aerated concrete building block |
| 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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| CN102234184A (en) * | 2010-04-21 | 2011-11-09 | 何育新 | Macromoleclar polymer thermoregulation energy-storage insulation mortar |
| CN107108377A (en) * | 2014-09-22 | 2017-08-29 | 霓佳斯株式会社 | Fireproof construction and its application method |
| CN107216087A (en) * | 2017-07-12 | 2017-09-29 | 张启志 | A kind of construction premixing mortar green construction method |
| CN107814515A (en) * | 2016-09-10 | 2018-03-20 | 江苏尚华新型建材有限公司 | A kind of premixing mortar prepared using large dosage bottom slag and preparation method thereof |
| KR101873782B1 (en) * | 2017-12-21 | 2018-07-03 | 주창종합건설 주식회사 | Cement mortar composition for repairing concrete structure with improved durability and repairing method of concrete structure therewith |
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2018
- 2018-09-27 CN CN201811132961.2A patent/CN109231944B/en active Active
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|---|---|---|---|---|
| CN102234184A (en) * | 2010-04-21 | 2011-11-09 | 何育新 | Macromoleclar polymer thermoregulation energy-storage insulation mortar |
| CN107108377A (en) * | 2014-09-22 | 2017-08-29 | 霓佳斯株式会社 | Fireproof construction and its application method |
| CN107814515A (en) * | 2016-09-10 | 2018-03-20 | 江苏尚华新型建材有限公司 | A kind of premixing mortar prepared using large dosage bottom slag and preparation method thereof |
| CN107216087A (en) * | 2017-07-12 | 2017-09-29 | 张启志 | A kind of construction premixing mortar green construction method |
| KR101873782B1 (en) * | 2017-12-21 | 2018-07-03 | 주창종합건설 주식회사 | Cement mortar composition for repairing concrete structure with improved durability and repairing method of concrete structure therewith |
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