CN114605124A - Preparation method of uniform-hole structure building block - Google Patents
Preparation method of uniform-hole structure building block Download PDFInfo
- Publication number
- CN114605124A CN114605124A CN202210353708.XA CN202210353708A CN114605124A CN 114605124 A CN114605124 A CN 114605124A CN 202210353708 A CN202210353708 A CN 202210353708A CN 114605124 A CN114605124 A CN 114605124A
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- Prior art keywords
- mortar
- building block
- volume
- pore
- mold
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Classifications
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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
- C04B28/04—Portland cements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
Abstract
Regular uniform holes with the volume of more than 45 percent are prefabricated in the dense concrete to form the heat-insulating high-strength building block. Polystyrene, silica gel and sodium silicate particles are used as pore-forming agents, high-density concrete mortar wrapped in the abdomen is used, the volume ratio of the pore-forming agents to the mortar is controlled to be 1: 0.75-0.55, the mortar is placed into a mold, the mold is covered, the volume of the mold is compressed to be 0.95-0.75 of the original volume, after the mortar is finally solidified, the mold is demoulded to form a blank, the blank is steam-cured or steam-cured, the pore-forming agents are melted while the building blocks obtain the strength, and closed holes which are uniformly and regularly distributed and regularly arranged in the volume are obtained, wherein the volume of the holes is more than or equal to 45% of the volume of the building blocks. The volume weight of the building block is between 750 and 950, the thermal conductivity coefficient is between 0.08 and 0.12, and the compressive strength is between 5MPa and 7.5 MPa.
Description
Technical Field
Belongs to the field of light silicate materials and building heat-insulating materials.
Background
A self-insulation building block system for buildings in a severe cold region is released in the Xinjiang region in 2021, and the main standards of the building blocks comprise that the compressive strength is more than or equal to 5MPa, the heat conductivity coefficient is less than or equal to 0.12W/(m.K) and the building blocks are homogeneous.
Chinese patent 201410363183.3 discloses a spar self-insulation building block and a production method thereof, which is characterized in that crystal seeds, slag micro powder, a composition agent and light insulation particles are mixed to form a spar self-insulation slurry, and the spar self-insulation slurry is injected into molds of different shapes to be condensed and hardened to form the spar self-insulation building block. The building blocks are directly used for building the wall body, so that the requirements of strength, heat preservation and fire prevention can be met simultaneously, the heat preservation material does not need to be pasted outside the wall body, and a plurality of problems of complex construction, potential safety hazard, fire hazard, incapability of having the same service life with the building and the like in the prior art are solved.
Chinese patent 202111234832.6 discloses a homogeneous microporous self-insulation building block produced by using industrial waste residues and a production process, which comprises a homogeneous microporous self-insulation building block main body, wherein cold bridge mortises are arranged at two ends of the homogeneous microporous self-insulation building block main body; the homogeneous microporous self-insulation building block main body is formed by pouring foam prepared by mixing building block slurry with a foaming agent; the formula of the building block slurry is as follows: 40 percent of ordinary Portland cement, 50 percent of high-performance concrete mineral admixture, 10 percent of polyphenyl granules, 0.2 percent of alkali-resistant chopped anti-cracking reinforcing fiber (added), and 0.02 percent of high-efficiency dispersant (added). The homogeneous microporous self-insulation building block disclosed by the invention is low in production cost, the weight is obviously reduced compared with that of a traditional building block, the mechanical property can reach the strength index of an aerated concrete building block, the building block is simple and quick to construct, industrial waste residues are used as raw materials, the energy-saving standard of saving energy by 65% for a wall body is reached, and the fireproof performance and the service life of the wall body can be improved by using the building block.
To the knowledge of the inventors, patent 201410363183.3 is a heterogeneous material in the strict sense of being lightweight insulating particles or mixed polystyrene particles. The 202111234832.6 patent microporous structure can only reach the strength index of aerated concrete blocks. The main indexes of the building blocks disclosed by the patent technology do not meet the requirements of building self-insulation building block systems for buildings in severe cold regions, which are released in Xinjiang in 2021.
Disclosure of Invention
In order to obtain a homogeneous building block with the compressive strength of more than or equal to 5MPa and the thermal conductivity of less than or equal to 0.12W/(m.K), the inventor adopts a technical route of pore-forming by pore-forming agents, when the building block is made into a blank, the pore-forming agents are arranged in the building block into a regular row-column structure, and the pore-forming agents are forced to melt or melt, dissolve or dissolve through the given temperature, pressure and time of a curing period, so as to obtain the structural building block with uniform pores filled in the volume. In order to improve the compressive strength of the building block, high-efficiency water reducing agents such as polycarboxylic acid and naphthalene are used, and meanwhile, a process encryption means is further adopted, and the compactness of the wrapped mortar is further improved through a process of wrapping the mortar with a pore-forming agent. Preferably, the high-compactness mortar coating is realized by a rotary table granulator, a water chestnut pan granulator and a roller granulator. A simple method for compressing the mold is optimized, air is discharged, and meanwhile the dispersed high-compactness coated mortar is communicated to form a communicated phase, so that the compression strength and the tensile strength of the bearing building block are improved. Preferably selecting the building block curing condition, and selecting the water retention at the temperature of more than 70 ℃, steam curing at the temperature of more than 70 ℃ or steam curing by using a pressure reaction kettle and a steam pressure reaction kettle. The curing time is preferably more than or equal to 6 hours. The curing conditions are preferably selected to meet the dual-function curing conditions of strength improvement of the building block and dissolution and disappearance of the pore-forming agent.
Further optimizing, coating 55-95 parts by volume of mortar with 100 parts by volume of pore-forming agent, pouring the pore-forming agent coated with the mortar into a mold, covering the mold, slowly compressing the volume of the mold, compressing the volume of the mold to 0.95-0.75 of the original volume, standing for final setting, demolding into a blank after final setting, performing high-temperature water retention curing, steam curing and steam curing on the blank, increasing the strength of the building block and simultaneously dissolving the pore-forming agent to obtain regular holes uniformly distributed and arranged in the volume of the building block, and preparing the building block with a uniform hole structure. Wherein, the pore-forming agent is one or the combination of more than two of polystyrene foam particles, silica gel foam particles and sodium silicate foam particles. Wherein, the mortar is one or the combination of more than two of cement mortar, cement fly ash mortar, cement slag mortar and cement fly ash slag mortar. Wherein, the pore-forming agent coating mortar uses a turntable granulator, a water chestnut pot granulator and a roller granulator to realize high-compactness coating. A single-sided or multi-sided compressible die is selected, a process of slowly compressing the die is used, excess air is discharged through die compression, and meanwhile dispersed coating mortar is communicated. Obtain UNICOM through the compression, and closely knit continuous phase mortar structure bears building block intensity. Wherein the optimized building block curing condition is the curing condition of water retention at the temperature of more than 70 ℃, steam curing at the temperature of more than 70 ℃ or steam curing in an autoclave and a pressure reactor. The curing time is more than 6 hours.
Specific example 1
Raw material preparation
Red fly ash, 42.5 ordinary Portland cement in Tianshan cement plant, 56Kg/m volume weight3Sodium silicate foaming particles with the particle size of 5mm and polycarboxylic acid water reducing agent with the concentration of 24%
Preparation of powder material
1L of fly ash and 1L of cement are uniformly stirred for later use
Preparation of liquid material
0.5L of water and 0.1L of polycarboxylic acid water reducing agent are evenly mixed for standby
Wrapping cover
Adding 2.5L sodium silicate foaming particles into a rotary table granulator, starting the rotary table, slowly adding the powder material and the liquid material to be used until the addition is finished
Blank making
Filling the wrapped pore-forming agent into a 100 x 100 triple die, covering with a 100 x 100 steel plate, pressing for 10mm, standing for 6 hr, and demolding
Maintaining
Selecting a curing method of introducing steam into a steam curing box, introducing steam into the box until the temperature reaches 90 ℃, putting the demolded blank into the box, controlling the temperature to be kept at 90 ℃, and curing for 6 hours
Pushing out the blank after the steam curing is finished, and continuously curing the indoor environment.
Example 1 testing
After 28 days, the compressive strength of the building blocks is detected
Average compressive strength of 6.2MPa, minimum compressive strength of 5.9MPa and maximum compressive strength of 6.5MPa
The cross section of the building block is observed, and the honeycomb structure is clear.
Specific example 2
Raw material preparation
The volume weight of the refined eight-steel blister slag and 42.5 common Portland cement in Tianshan cement plant is 12Kg/m3Polyphenyl foaming particles with the particle size of 4mm and polycarboxylic acid water reducing agent with the concentration of 24%
Pretreatment of expanded particles
Soaking 2.5L of polystyrene foaming particles in 5% sodium benzenesulfonate solution, stirring for 15min, filtering with a filter screen, draining for 1 hr
Preparation of powder material
1L of water soaking slag and 1L of cement are uniformly stirred for standby
Preparation of liquid material
0.5L of water and 0.1L of polycarboxylic acid water reducing agent are evenly mixed for standby
Wrapping cover
Adding 2.5L of drained polystyrene foaming particles to a rotary table granulator, starting the rotary table, slowly adding the powder material and the liquid material to be used until the addition is finished
Blank making
Filling the wrapped pore-forming agent into a 100 x 100 triple die, covering with a 100 x 100 steel plate, pressing for 10mm, standing for 6 hr, and demolding
Maintaining
Selecting a curing method of introducing steam into a steam curing box, introducing steam into the box until the temperature reaches 70 ℃, putting the demolded blank into the box, controlling the temperature to be maintained at 70 ℃, and curing for 6 hours
Pushing out the blank after the steam curing is finished, and continuously curing the indoor environment.
Example 2 detection
After 28 days, the compressive strength of the building blocks is detected
Average compressive strength of 5.1MPa, minimum compressive strength of 4.9MPa and maximum compressive strength of 5.4 MPa.
Specific example 3
Raw material preparation
Accurately grinding eight-steel blister slag, red two-electricity fly ash and 60Kg/m volume weight3Silicon gel foaming particles with the particle size of 3mm and polycarboxylic acid water reducing agent with the concentration of 24%
Preparation of powder material
Finely grinding 1L of eight-steel blister slag and 1L of red two-electricity fly ash, and uniformly stirring for later use
Preparation of liquid material
0.5L of water and 0.1L of polycarboxylic acid water reducing agent are evenly mixed for standby
Wrapping cover
Adding 2.5L of silica gel foaming particles into a rotary table granulator, starting the rotary table, slowly adding the powder material and the liquid material to be used until the addition is finished
Blank making
300X 35 three-connection mould is filled with the wrapped pore-forming agent, the coated pore-forming agent is covered with a 300X 300 steel plate after being fully paved, the steel plate is pressed down for 5mm, and the mould is demoulded after standing for 6h
Maintaining
Steam is introduced into an autoclave, the autoclave curing method is adopted, the demolded blank is put into the autoclave, a sealing bolt is arranged on the autoclave, the temperature is set to 182 ℃, the pressure is 1.1MPa, the pressure maintaining and curing are continued for 6 hours after the pressure is full, and the blank is taken out after natural cooling. And continuously maintaining in the indoor environment.
Example 3 detection
After 28 days, putting the sample blocks into a 105 ℃ oven, keeping the temperature for 4 hours, naturally cooling, and detecting the heat conductivity coefficient
The measured thermal conductivity value is 0.096W/(mK).
The above example is only one embodiment of the present invention and does not represent the entire content of the invention. The invention is described in the claims.
Claims (6)
1. A preparation method of a uniform hole structure building block is characterized by comprising the following steps: 100 parts by volume of pore-forming agent, wrapping 55-95 parts by volume of mortar, pouring the mortar into a mold after wrapping, covering the mold, slowly compressing the mold to 0.95-0.75 of the original volume, standing for final setting, demolding into a blank, and performing steam curing or steam pressure curing on the blank to obtain the uniformly-distributed and regularly-arranged uniform-pore-structure building block in the compact volume.
2. The method for preparing the uniform pore structure building block according to claim 1, wherein the pore-forming agent is characterized in that: polystyrene foam particles, silica gel foam particles and sodium silicate foam particles or a combination of more than two of the polystyrene foam particles, the silica gel foam particles and the sodium silicate foam particles.
3. The method for preparing the uniform pore structure building block according to claim 1 is characterized in that: one or a combination of more than two of cement mortar, cement fly ash mortar, cement slag mortar and cement fly ash slag mortar.
4. The method for preparing the uniform pore structure building block according to claim 1, wherein the pore-forming agent coated mortar is characterized in that: and coating the pore-forming agent mortar by using a turntable granulator, a water chestnut pot granulator and a roller granulator.
5. A method of making a uniform pore structure block according to claim 1, said slow compression characteristic being: air is discharged through a compression mould to obtain a compact and communicated mortar structure, and the volume ratio of the mould to the blank is 1: 0.95-0.75.
6. According to the claim 1, the preparation method of the uniform pore structure building block is characterized in that the steam curing or the steam curing is as follows: maintaining water at over 70 deg.c, steam curing at over 70 deg.c or steam curing in a pressure reactor at over 100 deg.c for 6 hr or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210353708.XA CN114605124A (en) | 2022-04-06 | 2022-04-06 | Preparation method of uniform-hole structure building block |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210353708.XA CN114605124A (en) | 2022-04-06 | 2022-04-06 | Preparation method of uniform-hole structure building block |
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| CN114605124A true CN114605124A (en) | 2022-06-10 |
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| CN202210353708.XA Pending CN114605124A (en) | 2022-04-06 | 2022-04-06 | Preparation method of uniform-hole structure building block |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4104077A (en) * | 1976-11-11 | 1978-08-01 | The Yokohama Rubber Co., Ltd. | Porous inorganic product |
| GB1535132A (en) * | 1977-02-07 | 1978-12-06 | Asano Pole Kk | Porous inorganic member and method of producing same |
| CN105272352A (en) * | 2014-06-18 | 2016-01-27 | 西北民族大学 | Lightweight wall special-purpose cell concrete, and production method thereof |
| CN106966754A (en) * | 2017-03-16 | 2017-07-21 | 江苏省冶金设计院有限公司 | A kind of pore creating material and preparation method and its method for preparing light-weight brick |
-
2022
- 2022-04-06 CN CN202210353708.XA patent/CN114605124A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4104077A (en) * | 1976-11-11 | 1978-08-01 | The Yokohama Rubber Co., Ltd. | Porous inorganic product |
| GB1535132A (en) * | 1977-02-07 | 1978-12-06 | Asano Pole Kk | Porous inorganic member and method of producing same |
| CN105272352A (en) * | 2014-06-18 | 2016-01-27 | 西北民族大学 | Lightweight wall special-purpose cell concrete, and production method thereof |
| CN106966754A (en) * | 2017-03-16 | 2017-07-21 | 江苏省冶金设计院有限公司 | A kind of pore creating material and preparation method and its method for preparing light-weight brick |
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Application publication date: 20220610 |