CN103449794A - Fly-ash-base geopolymer rice hull thermal-insulation mortar - Google Patents
Fly-ash-base geopolymer rice hull thermal-insulation mortar Download PDFInfo
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- CN103449794A CN103449794A CN2013103746404A CN201310374640A CN103449794A CN 103449794 A CN103449794 A CN 103449794A CN 2013103746404 A CN2013103746404 A CN 2013103746404A CN 201310374640 A CN201310374640 A CN 201310374640A CN 103449794 A CN103449794 A CN 103449794A
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- insulation mortar
- fly ash
- thermal insulation
- rice husk
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention provides a fly-ash-base geopolymer rice hull thermal-insulation mortar which comprises a dry powder mixture and water in a weight ratio of 5:(1-2), wherein the dry powder mixture comprises the following components in parts by weight: 20-40 parts of rice hull powder, 36-48 parts of fly ash, 15-20 parts of silica fume, 6-8 parts of sodium silicate solid, 3-4 parts of commercially pure sodium hydroxide and 0.24-0.32 parts of sodium tripolyphosphate. When in use, the dry powder mixture and water are mixed to a consistency according to the construction requirement, and then finishing construction can be performed. The thermal-insulation mortar has the advantages of light volume weight, favorable thermal insulation property and higher compression strength; and the heat conductivity coefficient is 0.08-0.18 W/m.K. The thermal-insulation mortar fully utilizes the waste rice hull powder generated by rice processing and the solid waste fly ash of heat power stations, thereby changing wastes into valuable substances, implementing waste recycling, fully displaying the characteristics of the rice hull powder, making the best use of everything and greatly enhancing the thermal insulation property of the wall. The mortar has the characteristics of low production cost, no environment pollution, energy saving and environmental protection, and is harmless to the human body.
Description
Technical field
The present invention relates to building material field, specifically a kind of fly ash base geopolymer rice husk thermal insulation mortar.
Background technology
China's lagging material makes significant progress in the application of building energy saving field in recent years, and most area mainly is used for interior external wall outer insulation with expansion polyphenyl plate, extruded polystyrene board and polyurathamc before.Yet, because organic insulation material reaches fire-resistant requirement, be not eliminated gradually.Therefore, research and develop novel, adopt light heat insulation material for gathering materials, cement is the formulated inorganic heat insulation mortar of gelling material, be subject to paying attention to widely, but for example, because the production of traditional portland is the industry of a high energy consumption, high resource consumption, high carrying capacity of environment,, produce 1t water grog and approximately consume the 1t Wingdale, discharge 1tCO
2, the about 90kW/h of power consumption, the about 130kg of coal.Cement industry can't bear the heavy load China's energy, resources and environment, brings stern challenge to the Sustainable development of Cement industry.Therefore seeking the low gelling material place of cement of polluting of new less energy-consumption prepares inorganic heat insulation mortar and has important social effect.
Geology polymer material (Geopolymer) is the class alkali excited cementing material that new development is in recent years got up.It is that to take natural aluminium silicate mineral or industrial solid castoff (flyash, coal gangue and slag) be main raw material, after fully mixing containing bauxite clay (being mainly metakaolin or kaolinite) and appropriate bases silicate solutions, the class aluminum silicate zeolitic material generated in the cold condition compacted unders of 20～120 ℃ sclerosis, the characteristics such as there is high strength, high corrosion resistance, high temperature resistant, thermal conductivity is low.Geological polymeric material has the character of the materials such as superpolymer, pottery and cement, can be used as gelling material and prepares concrete, and the engineering materialss such as mortar, be that current cement cementitious material of generally acknowledging tool potentiality substitutes or one of the green cementing material of supplemental production.
At present, quantity discharged every year of Coal Ash in China is over 3.0 hundred million tons.Because coal accounts for 70% in the disposable energy expenditure of China, domesticly in very long one period in future will take coal fired power generation as main, thereby will produce a large amount of flyash.Domestic only have 30% left and right to the comprehensive utilization ratio of flyash at present, and a large amount of flyash can not get effective utilization, adopt to stack process not only to have taken a large amount of soils, but also contaminate environment can say the recycling arduous task of solid waste.
Rice husk is as agricultural wastes, 20% of about paddy ultimate production, and since two thousand five, the annual production of China's paddy has reached more than 1.8 hundred million tons, calculates like this, produces more than 3,600 ten thousand tons, rice husk per year.Although China's rice husk resource is very abundant, China's rice husk utilization ratio is lower, has caused the great wasting of resources while in rural area, making fuel, but also environment is caused to great pollution.From the material character of rice husk itself, its quality is light, and surface has many holes, can form cap holes in mortar inside with cement mixing, thereby improve thermal resistance.And rice husk is originally as vegetable fibre, to of great advantage with raising mortar mechanical property.
Therefore, what the present invention proposed utilizes powdered rice hulls for light skeletal, and the fly ash base geopolymer is that gelling material prepares thermal insulation mortar and has certain perspective and practicality, and with clearly defined objective, means are proper, implement easily.Simultaneously, the present invention can utilize industrial waste flyash in a large number efficiently, to economizing on resources, save the energy and protection of the environment is significant, meets the strategy of sustainable development of construction industry.Thermal insulation mortar employing dry powder of the present invention adds the technique of water, identical with cement-based powder mortar using method, is conducive to promoting the use of of this fly ash base geopolymer thermal insulation mortar.
Summary of the invention
The technical problem the present invention relates to is to provide a kind of fly ash base geopolymer rice husk thermal insulation mortar; This fly ash base geopolymer rice husk thermal insulation mortar be take powdered rice hulls as aggregate, and flyash and silicon ash are exciting agent for gelling material, sodium silicate solid and technical pure sodium hydroxide, and can reach the ideal tensile strength standard of heat insulation system of internal and external walls.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of fly ash base geopolymer rice husk thermal insulation mortar, it is characterized in that, comprise powder mixture and water that weight ratio is 5:1～2, described powder mixture comprises according to the mass fraction: 0.24～0.32 part of 20～40 parts of powdered rice hulls, 36～48 parts, flyash, 15～20 parts of silicon ashes, 6～8 parts of sodium silicate solids, 3～4 parts, technical pure sodium hydroxide and tripoly phosphate sodium STPP.
The further setting of the present invention is, described powdered rice hulls is that the rice husk that the rice machining produces forms through fragmentation, and its particle diameter is less than 1mm, and natural packing density is at 200～400kg/m
3.
The further setting of the present invention is, described flyash is the powder of collecting in the flyash stove flue gas of fuel-burning power plant, its CaO mass content≤10%(belongs to F class flyash), intensity activity index >=70%, 45 tail over≤45.0%(of micron square hole sieve part technical performance index reaches III level and the above requirement in GB/T1596 " for the flyash of cement and concrete ").
The further setting of the present invention is, described silicon ash is the dust of discharging by flue when smelting ferrosilicon or industrial silicon, and what through collection, obtain take the powder body material that soft silica is main component; SiO
2mass content>=85%, specific surface area>=15m
2/ g, activity index>=105%(part technical requirements meets mortar and the reinforcement of concrete silicon ash (GB/T27690～2011) requires).
The further setting of the present invention is, soluble material massfraction>=95.0 in described sodium silicate solid, Na
2the mass content of O>=7.2%, SiO
2mass content>=25%, modulus is between 3.0～3.6.
The further setting of the present invention is, the part technical indicator of described technical pure sodium hydroxide meets I generic request, the i.e. massfraction of sodium hydroxide (in NaOH) >=94.0 in GB209～2006 " industrial sodium hydroxide ".
The further setting of the present invention is, described tripoly phosphate sodium STPP is commercially available powder shaped ceramic water reducing agent, its purity >=90.0%.
After the powder mixture of said components proportioning is added to water and is stirred to the required denseness of construction and requires, can use, the beneficial effect that the thermal insulation mortar of formation produces is:
(1) unit weight is light, good heat insulating, and thermal conductivity is 0.08～0.18W/mk;
(2) mechanical property is good, and ultimate compression strength is higher;
(3) the present invention takes full advantage of the standby thermal insulation mortar of the coal-fired waste coal ash for manufacturing of waste rice husk, heat power station of the rice course of processing, not only turns waste into wealth, and has realized utilization of waste material.And given full play to light, the tough and tensile corrosion resistant of the quality of powdered rice hulls own, pest-resistant erosion, thermal conductivity is low, elasticity is strong, withstand voltage mill, and the rice husk surface irregularity is jagged, have the good characteristics such as adhesive property after mixing, accomplish to make the best use of everything, greatly degree has promoted wall insulation performance.
(4) production cost is low, and harmless, free from environmental pollution, has the characteristics of energy-conserving and environment-protective.
Embodiment
Below in conjunction with embodiment, the invention will be further described, but it should be noted that, embodiment does not form the restriction to the claimed scope of the present invention.
Embodiment 1:
Proportioning raw materials:
The shared mass fraction of each starting material in powder mixture:
20 parts of powdered rice hulls;
48 parts, flyash;
20 parts of silicon ashes;
8 parts of sodium silicate solids;
4 parts, technical pure sodium hydroxide;
0.24 part of tripoly phosphate sodium STPP.
Concrete preparation technology is as follows:
(1) powder mixture: 20 parts of powdered rice hulls, 48 parts, flyash, 20 parts of silicon ashes, 8 parts of sodium silicate solids, 4 parts, technical pure sodium hydroxide, 0.24 part of mixing of tripoly phosphate sodium STPP, stir and within 5 minutes, make it evenly, to obtain powder mixture;
(2) powder mixture is mixed by weight 5:1 with water, stir 10 minutes, obtaining denseness is the 70mm slurry;
(3) slurry is injected respectively to 70.7mm * 70.7mm * 70.7mm and 300mm * 300mm * 30mm die trial, be placed in maintenance demoulding after 1 day under the normal temperature laboratory condition, continue maintenance to 28 day length of time after the demoulding; Wherein 70.7mm * 70.7mm * 70.7mm test cube is for the mortar intensity test, and 300mm * 300mm * 30mm plate tensile sample is for the mortar heat conductivity coefficient test;
(4) gained fly ash base geopolymer rice husk thermal insulation mortar is carried out to mechanical property and thermal performance test, its basic index is as follows:
Mean compressive strength is 8.3MPa, thermal conductivity 0.18W/mK.
Embodiment 2:
Proportioning raw materials:
The shared mass fraction of each starting material in powder mixture:
30 parts of powdered rice hulls;
42 parts, flyash;
17.5 parts of silicon ashes;
7 parts of sodium silicate solids;
3.5 parts, technical pure sodium hydroxide;
0.30 part of tripoly phosphate sodium STPP.
Concrete preparation technology is as follows:
(1) powder mixture: 30 parts of powdered rice hulls, 42 parts, flyash, 17.5 parts of silicon ashes, 7 parts of sodium silicate solids, 3.5 parts, technical pure sodium hydroxide, 0.30 part of mixing of tripoly phosphate sodium STPP, stir and within 5 minutes, make it evenly, to obtain powder mixture;
(2) powder mixture is mixed by weight 4:1 with water, stir 10 minutes, obtaining denseness is the 72mm slurry;
(3) slurry is injected respectively to 70.7mm * 70.7mm * 70.7mm and 300mm * 300mm * 30mm die trial, be placed in maintenance demoulding after 1 day under the normal temperature laboratory condition, continue maintenance to 28 day length of time after the demoulding; Wherein 70.7mm * 70.7mm * 70.7mm test cube is for the mortar intensity test, and 300mm * 300mm * 30mm plate tensile sample is for the mortar heat conductivity coefficient test;
(4) gained fly ash base geopolymer rice husk thermal insulation mortar is carried out to mechanical property and thermal performance test, its basic index is as follows:
Mean compressive strength is 5.3MPa, thermal conductivity 0.13W/mK.
Embodiment 3:
Proportioning raw materials:
The shared mass fraction of each starting material in powder mixture:
40 parts of powdered rice hulls;
36 parts, flyash;
15 parts of silicon ashes;
6 parts of sodium silicate solids;
3 parts, technical pure sodium hydroxide;
0.32 part of tripoly phosphate sodium STPP.
Concrete preparation technology is as follows:
(1) powder mixture: 40 parts of powdered rice hulls, 36 parts, flyash, 15 parts of silicon ashes, 6 parts of sodium silicate solids, 3 parts, technical pure sodium hydroxide, 0.36 part of mixing of tripoly phosphate sodium STPP, stir and within 5 minutes, make it evenly, to obtain powder mixture;
(2) powder mixture is mixed by weight 2.5:1 with water, stir 10 minutes, obtaining denseness is the 68mm slurry;
(3) slurry is injected respectively to 70.7mm * 70.7mm * 70.7mm and 300mm * 300mm * 30mm die trial, be placed in maintenance demoulding after 1 day under the normal temperature laboratory condition, continue maintenance to 28 day length of time after the demoulding; Wherein 70.7mm * 70.7mm * 70.7mm test cube is for the mortar intensity test, and 300mm * 300mm * 30mm plate tensile sample is for the mortar heat conductivity coefficient test;
(4) gained fly ash base geopolymer rice husk thermal insulation mortar is carried out to mechanical property and thermal performance test, its basic index is as follows:
Mean compressive strength is 1.8MPa, thermal conductivity 0.08W/mK.
Claims (7)
1. a fly ash base geopolymer rice husk thermal insulation mortar, is characterized in that, comprises powder mixture and water that weight ratio is 5:1～2; Described powder mixture comprises according to the mass fraction: 0.24～0.32 part of 20～40 parts of powdered rice hulls, 36～48 parts, flyash, 15～20 parts of silicon ashes, 6～8 parts of sodium silicate solids, 3～4 parts, technical pure sodium hydroxide and tripoly phosphate sodium STPP.
2. fly ash base geopolymer rice husk thermal insulation mortar according to claim 1, is characterized in that, described powdered rice hulls is that the rice husk that the rice machining produces forms through fragmentation, and its particle diameter is less than 1mm, and natural packing density is at 200～400kg/m
3.
3. fly ash base geopolymer rice husk thermal insulation mortar according to claim 1, it is characterized in that, described flyash is the powder of collecting in the flyash stove flue gas of fuel-burning power plant, its CaO mass content≤10%, more than 45 microns square hole sieves≤45.0%, grade is more than the III level reaches.
4. fly ash base geopolymer rice husk thermal insulation mortar according to claim 1, it is characterized in that, described silicon ash is the dust of discharging by flue when smelting ferrosilicon or industrial silicon, and what through collection, obtain take the powder body material that soft silica is main component, wherein SiO
2mass content>=85%, specific surface area>=15m
2/ g, activity index>=105%.
5. fly ash base geopolymer rice husk thermal insulation mortar according to claim 1, is characterized in that soluble material massfraction>=95.0 in described sodium silicate solid, Na
2the mass content of O>=7.2%, SiO
2mass content>=25%, modulus is between 3.0～3.6.
6. fly ash base geopolymer rice husk thermal insulation mortar according to claim 1, is characterized in that, the mass content of sodium hydroxide >=94% in described technical pure sodium hydroxide.
7. fly ash base geopolymer rice husk thermal insulation mortar according to claim 1, is characterized in that, described tripoly phosphate sodium STPP is the powder shaped ceramic water reducing agent, its purity >=90%.
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| CN2013103746404A CN103449794A (en) | 2013-08-26 | 2013-08-26 | Fly-ash-base geopolymer rice hull thermal-insulation mortar |
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| CN2013103746404A CN103449794A (en) | 2013-08-26 | 2013-08-26 | Fly-ash-base geopolymer rice hull thermal-insulation mortar |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105541203A (en) * | 2015-12-30 | 2016-05-04 | 浙江大学 | Geopolymer-based thermal-insulation mortar dry powder and preparation method thereof |
| CN106927735A (en) * | 2017-01-13 | 2017-07-07 | 温州大学 | The method of Fly-ash-base geopolymer rice hull thermal-insulation mortar and construction building heat preservation mortar for outer wall layer |
| CN108529913A (en) * | 2018-04-12 | 2018-09-14 | 范建国 | A kind of fine coal lacquer putty polymer material and the preparation method and application thereof |
| CN108975780A (en) * | 2018-07-27 | 2018-12-11 | 成都宏基建材股份有限公司 | A kind of geo-polymer mending mortar and its preparation and application |
| CN109133747A (en) * | 2018-09-06 | 2019-01-04 | 成都宏基建材股份有限公司 | A kind of geo-polymer mending mortar and its preparation and application with rust prevention function |
| CN109641798A (en) * | 2016-07-20 | 2019-04-16 | 西索斯公司 | Modified geo-polymer and modified geopolymer composite material and its production technology |
| CN111892367A (en) * | 2020-07-29 | 2020-11-06 | 深圳市奇信集团股份有限公司 | Energy-saving and environment-friendly cement mortar and preparation method thereof |
| CN115432996A (en) * | 2022-10-21 | 2022-12-06 | 景德镇陶瓷大学 | Rice hull ceramic material and preparation method thereof |
| US11993691B2 (en) | 2016-07-20 | 2024-05-28 | Synthos S.A. | Use of geopolymeric additive in combination with non-brominated flame retardant in polymer foams |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570426A (en) * | 2009-04-21 | 2009-11-04 | 同济大学 | Geo-polymer recycled concrete and preparation method thereof |
-
2013
- 2013-08-26 CN CN2013103746404A patent/CN103449794A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570426A (en) * | 2009-04-21 | 2009-11-04 | 同济大学 | Geo-polymer recycled concrete and preparation method thereof |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105541203A (en) * | 2015-12-30 | 2016-05-04 | 浙江大学 | Geopolymer-based thermal-insulation mortar dry powder and preparation method thereof |
| CN109641798A (en) * | 2016-07-20 | 2019-04-16 | 西索斯公司 | Modified geo-polymer and modified geopolymer composite material and its production technology |
| US11440843B2 (en) | 2016-07-20 | 2022-09-13 | Synthos S.A. | Modified geopolymer and modified geopolymer composite and process for the production thereof |
| US11993691B2 (en) | 2016-07-20 | 2024-05-28 | Synthos S.A. | Use of geopolymeric additive in combination with non-brominated flame retardant in polymer foams |
| CN106927735A (en) * | 2017-01-13 | 2017-07-07 | 温州大学 | The method of Fly-ash-base geopolymer rice hull thermal-insulation mortar and construction building heat preservation mortar for outer wall layer |
| CN106927735B (en) * | 2017-01-13 | 2020-09-29 | 温州大学 | Fly ash based geopolymer rice hull thermal insulation mortar and method for constructing building exterior wall thermal insulation mortar layer |
| CN108529913A (en) * | 2018-04-12 | 2018-09-14 | 范建国 | A kind of fine coal lacquer putty polymer material and the preparation method and application thereof |
| CN108975780A (en) * | 2018-07-27 | 2018-12-11 | 成都宏基建材股份有限公司 | A kind of geo-polymer mending mortar and its preparation and application |
| CN109133747A (en) * | 2018-09-06 | 2019-01-04 | 成都宏基建材股份有限公司 | A kind of geo-polymer mending mortar and its preparation and application with rust prevention function |
| CN111892367A (en) * | 2020-07-29 | 2020-11-06 | 深圳市奇信集团股份有限公司 | Energy-saving and environment-friendly cement mortar and preparation method thereof |
| CN115432996A (en) * | 2022-10-21 | 2022-12-06 | 景德镇陶瓷大学 | Rice hull ceramic material and preparation method thereof |
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Application publication date: 20131218 |