CN101948277B - Method for preparing light porous inorganic gelled material product from gel particles - Google Patents
Method for preparing light porous inorganic gelled material product from gel particles Download PDFInfo
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- CN101948277B CN101948277B CN2010102748752A CN201010274875A CN101948277B CN 101948277 B CN101948277 B CN 101948277B CN 2010102748752 A CN2010102748752 A CN 2010102748752A CN 201010274875 A CN201010274875 A CN 201010274875A CN 101948277 B CN101948277 B CN 101948277B
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Abstract
The invention relates to a method for preparing a light porous inorganic gelled material product from gel particles. The method comprises the following steps of: preparing pore former particles of which the particle sizes are between 0.5 and 5 millimeters from a natural linear polysaccharide polymer and a gelled cross-linking agent; and doping the pore former particles separately or together with expanded perlite particles and polystyrene foam particles into an inorganic gel material in a compounding mode according to different proportions so as to obtain the light porous material product. The volume density, intensity, pore size and density distribution of the material can be conveniently adjusted by altering the particle size and mixing amount of the pore former particles. The heat conductivity coefficient of the prepared light porous material is only between 0.12 and 0.17 w/m.k and high heat preserving performance and high heat insulating performance are achieved. The material can be used for molding and manufacturing materials having requirements on light weight, heat preservation, heat insulation, sound insulation, energy conservation and the like. The preparation method has the advantages of simpleness, safety, low energy consumption and easy control and adjustment.
Description
Technical field
The present invention relates to prepare the method for light porous inorganic coagulation material goods, be used to make porous light-weight material with heat insulating and sound-proofing properties with gel particle.
Background technology
Current, China's rapid economic development, under the prerequisite of the strategy of sustainable development, all trades and professions all propose the requirement of saving energy and reduce the cost.Light porous material is as a kind of novel material of construction and heat preserving and insulating material, has in light weight, heat insulating, sound insulation, anti-aging, good characteristic such as fire performance is good, meets green, environmental protection, the energy-conservation requirement stressed day by day in recent years.Present most of lightweight and porous material also adopt frothing aid when moulding, to foam except adopting light-weight aggregate.Because sample is higher to the conditional request of foaming pore-forming at the maintenance initial stage; In foaming process, can produce the merging of part bubble, come-up and the unequal bad phenomenon of void distribution; Cause formed void shape and not of uniform size, and sphericity is relatively poor, bearing capacity is lower; Add the shape size of hole and distribute wayward, can not the fine needs that satisfy various light porous materials.The air-entrained concrete building block of present architectural use though can strengthen the heat insulating effect of buildings, all need pass through the HTHP boiling in process of production, consume mass energy.
Summary of the invention
The purpose of this invention is to provide a kind of make spherical hole size in the inorganic coagulation material goods close, be evenly distributed, hole size and density can be regulated, process for preparation need not to heat prepares the method for light porous inorganic coagulation material goods with gel particle.
The present invention solves the problems of the technologies described above with following scheme:
The process step that single pore former particle is mixed preparation light porous material in the inorganic coagulation material is:
1. be 0.7%～1.3% sodium alginate soln with concentration, use spraying equipment to be injected in the calcium chloride solution that concentration is 0.5～1.5mol/L, reacted 5～20 minutes, the gel particle of the high-moisture that makes gets the pore former particle with flushing with clean water;
2. be 30%～90% to be incorporated in inorganic coagulation material cement or gypsum or the ground polymers material the pore former particle according to the volume percent of piling up; Add the water stirring and process uniform slip, go into mould, the demoulding after 24 hours; Natural curing makes the inorganic coagulation material goods of light porous property.
The process step of pore former particle and expanded perlite granule or polystyrene foam particles being mixed again the preparation light porous material is:
1. be 0.7%～1.3% sodium alginate soln with concentration, use spraying equipment to be injected in the calcium chloride solution that concentration is 0.5～1.5mol/L, reacted 5～20 minutes, the gel particle of the high-moisture that makes gets the pore former particle with flushing with clean water;
2. carry out composite according to 1: 3～3: 1 volume ratio pore former particle and expanded perlite granule or polystyrene foam particles; Composite gathering materials mixed in the inorganic coagulation material by 30%～90% volume percent; Add the water stirring and process uniform slip, go into mould, the demoulding after 24 hours; Through natural curing, make inorganic coagulation material goods with light porous property.
The pore former particle can be regulated with pressure through changing the shower nozzle aperture, and the control particle diameter and carries out size classification with screen cloth and puts into clear water afterwards and preserve between 0.5～5mm.
The beneficial effect of the inventive method is:
1, can regulate hole size and hole density in the goods as required within the specific limits, density through the control hole and the ratio that light-weight aggregate is mixed are again controlled the volume density and the intensity of light porous material;
2, the hole majority that forms in the sample is a spherical pore, and spherical hole size is close, be evenly distributed, and the light material load performance with spherical pore is better relatively;
3, process for preparation need not to heat, and maintenance processes is consumed energy not, can mix mutually with other light-weight aggregates;
The thermal conductivity of the light porous material of 4, processing only between 0.12～0.17w/m.k, has good thermal and insulating performance.The moulding and the making of the material that can be used for lightweight, insulation, heat insulation, sound insulation, energy-conservation etc. required;
5. the method for preparing pore former and be mixed with light porous material with this pore former and gelling material is all very simple, convenient, safely, be easy to control and regulate; Energy consumption is low, and it is different also can to make performance, the multiple light porous material that purposes is different.
Description of drawings
Fig. 1 is a test block tangent plane photo.
Fig. 2 is the local photo that amplifies 10 times of test block tangent plane.
Embodiment
Method of the present invention mainly is to have utilized because the dehydration drying of gel particle has formed the principle of hole in hardened inorganic coagulation material inside; Guaranteed that light porous material goods thermal conductivity is low; The preparation power consumption is few; The inner hole of the light porous material that makes is many and spare, and hole size, controllable density system.
(1) pore former particulate preparation
1. sodium-alginate is a kind of natural line style polysaccharide polymer, have well water-soluble, as the gelation mother liquor.Compound concentration is 0.7%～1.3% sodium alginate aqueous solution by mass percentage: 20～80 ℃ of following mechanical stirring it is dissolved in the water sodium-alginate; (wherein in the time of 60 ℃, stir, the dissolved net effect is best;) form the sodium alginate aqueous solution of transparent and homogeneous, it is for use to be cooled to room temperature.
2. adopt calcium chloride as the gelation linking agent.The calcium chloride solution of preparation 0.5～1.5mol/L is preserved for use.
3. the sodium alginate soln that obtains step 1; Be injected in the calcium chloride solution that step 2 obtains with spraying equipment; Can form the high-moisture gel particle, these gel particles reacted in calcium chloride solution 5～20 minutes, took out and use flushing with clean water then; Make the pore former particle, after screen cloth carries out size grading, put into clear water and preserve for use.
The pore former particle grain size can be regulated through adopting different shower nozzle aperture and pressure, and the control particle diameter is between 0.5～5mm.Gained pore former particulate water cut >=92%.
In preparation pore former particulate process, as long as the concentration of linking agent calcium chloride solution is remained on certain level, the preparation of pore former particulate just can be carried out continuously.
(2) preparation of light porous material
1, the pore former particle that makes is mixed separately prepares light porous material in the inorganic coagulation material.Can be 30%～90% to be incorporated in inorganic coagulation material such as cement or the gypsum etc. according to the volume percent of piling up with the pore former particle during preparation, add water and stir and process uniform slip, go into mould, the demoulding after 24 hours, natural curing.In maintenance processes, owing to the dehydration gradually of pore former particle, contraction, the further aquation that can be cement on the one hand provides moisture content, produces hole owing to shrinking on the other hand, thereby makes the inorganic materials goods with light porous property.
2, carry out pore former particle and light-weight aggregate such as expanded perlite granule and/or polystyrene foam particles composite according to 1: 3～3: 1 volume ratio; Composite gathering materials mixed in inorganic coagulation material cement or the gypsum etc. by 30%～90% volume percent; Add the water stirring and process distributed slurry, go into mould, the demoulding after 24 hours; After natural curing, can make light porous inorganic materials goods.
Embodiment 1:
Gather materials (particle diameter is between 2～3mm) with the conduct of pore former particle, and join in the grout according to different volumes per-cent, after stirring, injection molding, maintenance, process light porous concrete test block, concrete proportioning and detected result are as shown in the table:
Table 1 gathers materials and is pore former particulate concrete formulation and performance
1. the W/C in the table is a wc.
2. the volume that gathers materials is represented is pore former particle or the composite shared percent by volume when in mould, piling up of gathering materials.
7 days ultimate compression strength of prepared light porous concrete test block is between 0.61-6.37Mpa, and 28 days ultimate compression strength is between 0.82-6.62Mpa, and dry state density is at 472.7-881.7kg/m
3Between.
Embodiment 2:
Gather materials with pore former particle and the composite conduct of expanded perlite granule, and join in the grout according to different ratios and volume percent.After stirring, injection molding, maintenance, prepare light porous concrete test block.The performance of concrete proportioning and made light porous concrete test block like following table 2 with shown in the table 3:
Table 2 gathers materials and is pore former particle (A) and the composite concrete proportioning table of expanded perlite granule (B)
Table 3 gathers materials and is pore former particle (A) and the composite concrete performance of expanded perlite granule (B)
7 days ultimate compression strength of prepared light porous concrete test block is between 2.33-5.71Mpa, and 28 days ultimate compression strength is between 0.89-7.03Mpa, and dry state density is at 534.5-896.73kg/m
3Between.
Embodiment 3:
Gather materials with pore former particle and the composite conduct of polystyrene foam particles, and join in the middle of the cement slurry according to different ratios and volume percent.After stirring, injection molding, maintenance, process light porous concrete test block.The performance of concrete proportioning and made light porous concrete test block like following table 4 with shown in the table 5:
Table 4 gathers materials and is pore former particle (A) and the composite proportioning table of polystyrene foam particles (C)
Table 5 gathers materials and is pore former particle (A) and the composite concrete performance of polystyrene foam particles (C)
7 days ultimate compression strength of prepared light porous concrete test block is between 3.58-7.08Mpa, and 28 days ultimate compression strength is between 3.95-8.78Mpa, and dry state density is at 634.4-858.4kg/m
3Between.
Embodiment 4:
Separately pore former particle (volume ratio is 90%) is joined in the cement slurry as gathering materials, after stirring, injection molding, maintenance, process light porous concrete test block.Fig. 1 and Fig. 2 are respectively the tangent plane photo and the local photo that amplifies 10 times of test block tangent plane of present embodiment gained test block; Can know from photo and to find out: form spherical hole after the pore former particle dehydration drying; The aperture overwhelming majority is between 1～2mm, and the hole is evenly distributed on tangent plane, the regular shape in hole; And internal surface is smooth, and the light porous concrete test block that this method is processed has bearing capacity preferably.
Claims (3)
1. prepare the method for light porous inorganic coagulation material goods with gel particle for one kind, it is characterized in that the process step that single pore former particle is mixed preparation light porous material in the inorganic coagulation material is:
With mass percent concentration is 0.7%～1.3% sodium alginate soln, uses spraying equipment to be injected in the calcium chloride solution that concentration is 0.5～1.5mol/L, reacts 5～20 minutes, and the gel particle of the high-moisture that makes gets the pore former particle with flushing with clean water;
Is 30%～90% to be incorporated in the inorganic coagulation material the pore former particle according to the volume percent of piling up; Said inorganic coagulation material is cement or gypsum or ground polymers material; Add the water stirring and process uniform slip, go into mould, the demoulding after 24 hours; Natural curing makes the inorganic coagulation material goods of light porous property.
2. prepare the method for light porous inorganic coagulation material goods with gel particle for one kind, it is characterized in that the process step of pore former particle and expanded perlite granule or polystyrene foam particles being mixed again the preparation light porous material is:
With mass percent concentration is 0.7%～1.3% sodium alginate soln, uses spraying equipment to be injected in the calcium chloride solution that concentration is 0.5～1.5mol/L, reacts 5～20 minutes, and the gel particle of the high-moisture that makes gets the pore former particle with flushing with clean water;
Carry out composite according to 1: 3～3: 1 volume ratio pore former particle and expanded perlite granule or polystyrene foam particles; Composite gathering materials mixed in the inorganic coagulation material by 30%～90% volume percent; Add the water stirring and process uniform slip, go into mould, the demoulding after 24 hours; Through natural curing, make inorganic coagulation material goods with light porous property.
According to claim 1 or claim 2 prepare the method for light porous inorganic coagulation material goods with gel particle; It is characterized in that the pore former particle can regulate through changing shower nozzle aperture and pressure; The control particle diameter and carries out putting into clear water after the size classification with screen cloth and preserves between 0.5～5mm.
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| CN107573092A (en) * | 2017-10-24 | 2018-01-12 | 西南科技大学 | A kind of porous material and preparation method thereof |
| CN108546031A (en) * | 2018-04-24 | 2018-09-18 | 常州五荣化工有限公司 | A kind of preparation method of foam concrete |
| CN111848104A (en) * | 2020-07-29 | 2020-10-30 | 湖州南浔兴云建材有限公司 | Preparation method of environment-friendly safe low-cost sound-insulation and heat-insulation building block |
| CN115030133B (en) * | 2022-06-28 | 2023-09-22 | 广州市北二环交通科技有限公司 | Soft soil foundation treatment method capable of reducing water damage of soft soil foundation |
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