CN104909620A - Thermal insulation mortar containing semidry method desulfurized fly ash and preparation method therefor - Google Patents
Thermal insulation mortar containing semidry method desulfurized fly ash and preparation method therefor Download PDFInfo
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- CN104909620A CN104909620A CN201510242760.8A CN201510242760A CN104909620A CN 104909620 A CN104909620 A CN 104909620A CN 201510242760 A CN201510242760 A CN 201510242760A CN 104909620 A CN104909620 A CN 104909620A
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- slag
- thermal insulation
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- fly ash
- dry desulphurization
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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
Abstract
Provided is thermal insulation mortar containing semidry method desulfurized fly ash. The thermal insulation mortar containing semidry method desulfurized fly ash comprises the following raw materials, by weight, 10-15% of ore slag with a granularity of being less than or equal to 0.074mm, 36-42% of thermal insulation sands with a granularity of being less than 2mm, 0.5-4% of semidry method desulfurized fly ash with a granularity of being less than 1mm, 36-44% of steel slag with a granularity of being less than 2mm, 3-8% of cement and 0.2-0.5% of additives. In addition, water with a weight of being 85-100% of the total weight of the added glass bead thermal insulation sands is added. The preparation method is as follows: the semidry method desulfurized fly ash and the steel slag are dried; the semidry method desulfurized fly ash and the steel slag are crushed; the semidry method desulfurized fly ash, the steel slag, the cement, the ore slag and the additives are stirred and mixed; water is added and the mixture is stirred uniformly; glass bead thermal insulation sands are added and the mixture is stirred uniformly; packaging is carried out and the product is standby. The defect can be overcome that the stability is poor when steel slag is employed as an inorganic thermal insulation mortar materials, the pollution problem caused by desulfurized fly ash stockpiling can be solved effectively, and the desulfurized fly ash integration utilization is raised.
Description
Technical field
The present invention relates to a kind of construction material, belong to a kind of thermal insulation mortar and the preparation method that contain semi-dry desulphurization ash particularly.
Background technology
Along with increasing of semi-dry desulphurization project, the generation cumulative year after year of semi-dry desulphurization ash, according to statistics, a 360m
2sinter machine adopts full flue gas desulfurization, then produce 4 ~ 50,000 tons every year, and desulphurize fly ash major ingredient is calcium sulfite, calcium sulfate, calcium carbonate and calcium hydroxide.At present, desulphurize fly ash many as additive for the preparation of cement, brick or inorganic materials.Because desulphurize fly ash sulfite calcium contents is higher, during its practical application, be subject to various restriction.And a kind of industrial residue produced when slag is steel-making simultaneously, its quantity is generally 10 ~ 20% of crude steel output, and generation is huge.The generation of national slag in 2011 is about 0.7 hundred million tons, and the comprehensive utilization ratio of slag only has 20% according to incompletely statistics.The shortcomings such as traditional process for treating steel slag ubiquity floor space is large, processing environment is seriously polluted, devices consume is large; Simultaneously general modified method, usually because active oxidation calcium contents in slag is high, unstable, cannot be promoted the use of normally.Storing up in a large number of slag, brings a large amount of dust pollutions to the on-site environment of iron and steel enterprise, also occupies valuable land resources in a large number, " the dual waste " of this resource of being known as in environmentalism simultaneously.
In recent years, the features such as inorganic heat insulation mortar does not fire because it has, nontoxic, odorless, lightweight, bond effect are good, easy construction, have been widely used in all kinds of building exterior wall heat preserving, especially excellent performance in fire prevention, weather resistance, its cost less expensive is reasonable, therefore is applied fast.Inorganic heat insulation material is generally gathered materials by inorganic light weights such as pearlstone, expansion vitrification glass, cement to mix with high molecular polymer be that agglutinate forms.Do not see the application report of semi-dry desulphurization ash for thermal insulation mortar at present.
The present invention is directed to semi-dry desulphurization ash can not be used for production of construction materials technical bottleneck without ageing and stabilization treatment, desulphurize fly ash and slag micropowder-slag compounding technology is adopted to produce mortar, not only effectively can solve desulphurize fly ash and store up the pollution problem brought, can solve the problem that when slag makees building materials adulterant, stability is bad, be kill two birds with one stone simultaneously.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, when providing one can solve employing slag as inorganic heat insulation mortar material, the problem that stability is bad can be produced, and effectively can solve desulphurize fly ash and store up the pollution problem brought, improve the thermal insulation mortar containing semi-dry desulphurization ash and the preparation method of desulphurize fly ash comprehensive utilization.
Realize the measure of above-mentioned purpose:
A kind of thermal insulation mortar containing semi-dry desulphurization ash, its raw material composition and weight percent content are: the slag of granularity≤0.074mm: 10 ~ 15%, the insulation sand of granularity < 2mm: 36 ~ 42%, granularity < 1mm semi-dry desulphurization ash: 0.5 ~ 4%, the slag of granularity < 2mm: 36 ~ 44%, cement: 3 ~ 8%; Additive: 0.2 ~ 0.5%; Add water according to 85 ~ 100% of added vitrified micro-bead heat preserving sand gross weight in addition.
It is: described additive by: rubber powder 0.05 ~ 0.15%, PP fiber 0.05 ~ 0.1%, ether of cellulose 0.05 ~ 0.1%, wood fibre 0.05 ~ 0.1%, calcium formiate 0.01 ~ 0.05% is according to the composition of arbitrary proportion.
Prepare a kind of method of the thermal insulation mortar containing semi-dry desulphurization ash, its step:
1) semi-dry desulphurization ash and slag are dried, and control weight in wet base degree and be no more than 1 %;
2) carry out fragmentation to semi-dry desulphurization ash and slag, the Task-size Controlling of semi-dry desulphurization ash is at < 1mm, and the Task-size Controlling of slag is at < 2mm, and the specific surface area of slag is not less than 45m
2/ kg;
3) semi-dry desulphurization ash, slag, cement, slag and additive are fully uniformly mixed;
4) add water, and add according to 85 ~ 100% of per kilogram vitrified micro-bead heat preserving sand, and stir;
5) add vitrified micro-bead heat preserving sand, and stir;
6) pack, stand-by.
The effect of each raw material of the present invention:
Vitrified micro-bead heat preserving sand, has that incendivity is low, fire resistance rating is high, meeting high temperature can not the advantage of Emitting Volatile gas and toxic and harmful.
Semi-dry desulphurization ash, it is due to containing anhydrite, there is when hardening the feature of microdilatancy, make thermal insulation mortar early the length of time time also there is the feature of microdilatancy, and the drying shrinkage value in later stage obviously reduces, along with the raising of content, even can microdilatancy during thermal insulation mortar 28d length of time, contribute to the splitting resistance improving thermal insulation mortar.But when its content higher than 5% time, ftracture after its microdilatancy effect easily makes mortar hardening, therefore should control the volume of desulphurize fly ash.
Adopt slag, slag and cement composition composite cementitious binder, it can make the present invention's intensity after curing higher than Portland cement, has weather resistance more better than common thermal insulation mortar.There is hydration reaction in slag, slag and cement, when respectively estimating one's own ability after higher than higher limit, between raw material, ratio occurs unbalance, and part material does not react, and can not form the Behavior of Hardened Cement Paste of high strength, the extreme influence intensity of thermal insulation mortar product in certain weight range.
Additive, it significantly can improve the rheological of thermal insulation mortar, improves intensity and the water tolerance of thermal insulation mortar, and contributes to the water-intake rate reducing thermal insulation mortar.Also contribute to the folding strength improving thermal insulation mortar, improve the splitting resistance of thermal insulation mortar.But after higher than upper limit content.PP fiber is for improving dispersiveness and the bond stress of mortar; Rubber powder is for improving the cohesive force between each raw material of mortar powder; Ether of cellulose, wood fibre are for improving water-retentivity, the splitting resistance of mortar; Calcium formiate is hardening accelerator.Various additive need add according to a certain percentage, otherwise can affect mortar performance.Added as Mierocrystalline cellulose mortar can be made to produce segregation aborning, sand material can sink to the bottom, surperficial one deck grout, setting time overlength, intensity is low, and material can be scrapped.
The present invention compared with prior art, its feature:
(1) the present invention's cement amount used is few, mainly utilizes Iron And Steel Industry solid waste slag, desulphurize fly ash; And raw materials wide material sources, cheap, therefore can thermal insulation mortar raw materials cost low, easy to utilize; Have that incendivity is low, fire resistance rating is high, meeting high temperature can not the advantage of Emitting Volatile gas and toxic and harmful.
(2) after adding semi-dry desulphurization ash, not only make semi-dry desulphurization ash be fully utilized, can also make thermal insulation mortar early the length of time time also there is the feature of microdilatancy, thermal insulation mortar of the present invention is obviously reduced at the drying shrinkage value in later stage; And along with the suitable raising of semi-dry desulphurization ash add-on, even can microdilatancy during thermal insulation mortar 28d length of time, this contributes to the splitting resistance improving thermal insulation mortar.
(3) slag, slag and cement interpolation and form composite cementitious binder, can make thermal insulation mortar of the present invention harden after intensity higher than Portland cement, there is weather resistance more better than common thermal insulation mortar.
(4) additive, i.e. redispersable latex powder, methylhydroxypropylcellulose ether, wood fibre, polypropylene fibre etc., significantly can improve the rheological of thermal insulation mortar, improve intensity and the water tolerance of thermal insulation mortar, and contribute to reducing the water-intake rate of thermal insulation mortar and improving the folding strength of thermal insulation mortar, improve the splitting resistance of thermal insulation mortar.
(5) ordinary process is adopted to produce.
(6) application property and use properties fabulous, through test, ultimate compression strength of the present invention reaches 0.8 ~ 1.2MPa, and folding strength reaches 0.5 ~ 0.8MPa, and dry density is lower than 320 kg/m
3, be a kind of thermal insulation layer of high-strength light.
Embodiment
Below the present invention is described in detail:
Table 1 is the raw material value list of various embodiments of the present invention and comparative example;
Table 2 is the mechanical property situation list of various embodiments of the present invention and comparative example.
Various embodiments of the present invention are produced in accordance with the following steps:
1) semi-dry desulphurization ash and slag are dried, and control weight in wet base degree and be no more than 1 %;
2) carry out fragmentation to semi-dry desulphurization ash and slag, the Task-size Controlling of semi-dry desulphurization ash is at < 1mm, and the Task-size Controlling of slag is at < 2mm, and the specific surface area of slag is not less than 45m
2/ kg;
3) semi-dry desulphurization ash, slag, cement, slag and additive are fully uniformly mixed;
4) add water, and add according to 85 ~ 100% of per kilogram vitrified micro-bead heat preserving sand, and stir;
5) add vitrified micro-bead heat preserving sand, and stir;
6) pack, stand-by.
The raw material value list (wt%) of table 1 various embodiments of the present invention and comparative example
Illustrate: the equal < 1mm of granularity of semi-dry desulphurization ash, the equal < 2mm of granularity of slag, the specific surface area of slag is all greater than 45m
2/ kg, the equal < 0.074mm of granularity of slag.
The mechanical property situation list of table 2 various embodiments of the present invention and comparative example
As can be seen from Table 2, after semi-dry desulphurization ash mixes, in embodiment 1 ~ 8, the mechanical property of the thermal insulation mortar of preparation is, 7 days folding strength 0.56 ~ 0.75 MPa, and comparatively comparative example 1 is high by 12% ~ 50%; 7 days ultimate compression strength 0.84 ~ 1.02 MPa, comparatively comparative example 1 is high by 6 ~ 45%; 28 days folding strength 0.75 ~ 0.9 MPa, comparatively comparative example 1 is high by 7% ~ 13.9%; 28 days ultimate compression strength 1.13 ~ 1.25 MPa, comparatively comparative example 1 is high by 9.7 ~ 21.4%.And reduction production cost per ton 20 ~ 50 yuan.Both solve the resource utilization issue of semi-dry desulphurization ash, reduce the production cost of enterprise simultaneously.
This embodiment is only the best and exemplifies, the restricted enforcement not to technical solution of the present invention.
Claims (3)
1. the thermal insulation mortar containing semi-dry desulphurization ash, its raw material composition and weight percent content are: the slag of granularity≤0.074mm: 10 ~ 15%, the insulation sand of granularity < 2mm: 36 ~ 42%, granularity < 1mm semi-dry desulphurization ash: 0.5 ~ 4%, the slag of granularity < 2mm: 36 ~ 44%, cement: 3 ~ 8%; Additive: 0.2 ~ 0.5%; Add water according to 85 ~ 100% of added vitrified micro-bead heat preserving sand gross weight in addition.
2. a kind of thermal insulation mortar containing semi-dry desulphurization ash as claimed in claim 1, it is characterized in that: described additive is by rubber powder 0.05 ~ 0.15%, PP fiber 0.05 ~ 0.1%, ether of cellulose 0.05 ~ 0.1%, wood fibre 0.05 ~ 0.1%, calcium formiate 0.01 ~ 0.05% is according to the composition of arbitrary proportion.
3. the method for a kind of thermal insulation mortar containing semi-dry desulphurization ash of preparation, its step:
1) semi-dry desulphurization ash and slag are dried, and control weight in wet base degree and be no more than 1 %;
2) carry out fragmentation to semi-dry desulphurization ash and slag, the Task-size Controlling of semi-dry desulphurization ash is at < 1mm, and the Task-size Controlling of slag is at < 2mm, and the specific surface area of slag is not less than 45m
2/ kg;
3) semi-dry desulphurization ash, slag, cement, slag and additive are fully uniformly mixed;
4) add water, and add according to 85 ~ 100% of per kilogram vitrified micro-bead heat preserving sand, and stir;
5) add vitrified micro-bead heat preserving sand, and stir;
6) pack, stand-by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510242760.8A CN104909620A (en) | 2015-05-14 | 2015-05-14 | Thermal insulation mortar containing semidry method desulfurized fly ash and preparation method therefor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510242760.8A CN104909620A (en) | 2015-05-14 | 2015-05-14 | Thermal insulation mortar containing semidry method desulfurized fly ash and preparation method therefor |
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| CN104909620A true CN104909620A (en) | 2015-09-16 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110330274A (en) * | 2019-06-21 | 2019-10-15 | 万红梅 | A kind of preparation method of high-strength dry powder mortar |
| CN111848043A (en) * | 2020-07-28 | 2020-10-30 | 中铁隧道局集团有限公司 | Flame-retardant cement-based capillary crystalline waterproof coating and preparation method thereof |
| CN112456935A (en) * | 2020-11-30 | 2021-03-09 | 武汉武新新型建材股份有限公司 | Wet-mixed plastering mortar containing all-steel plant solid waste components and preparation method thereof |
| CN113698141A (en) * | 2021-07-30 | 2021-11-26 | 辽宁壹立方砂业有限责任公司 | Solid-waste high-mixing-amount ecological cement composition |
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| CN101104551A (en) * | 2007-03-20 | 2008-01-16 | 首钢总公司 | Steel slag heat-insulating finishing mortar |
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| CN102491664A (en) * | 2011-11-24 | 2012-06-13 | 上海宝田新型建材有限公司 | Modified steel slag composite admixture and preparation method thereof |
| CN102515595A (en) * | 2011-11-22 | 2012-06-27 | 上海市建筑科学研究院(集团)有限公司 | Composite cementitious material of desulfurated waste residue and mortar prepared from same |
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| CN103755261A (en) * | 2013-12-31 | 2014-04-30 | 武汉武新新型建材有限公司 | Waterproof plastering mortar slurry doped with mineral powder |
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2015
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Patent Citations (7)
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| KR100932890B1 (en) * | 2009-07-20 | 2009-12-21 | 주식회사 한국종합기술 | Construction method of non-slip ground surface using a inorganic-based aqueous polymer mortar |
| CN102515595A (en) * | 2011-11-22 | 2012-06-27 | 上海市建筑科学研究院(集团)有限公司 | Composite cementitious material of desulfurated waste residue and mortar prepared from same |
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| CN103755261A (en) * | 2013-12-31 | 2014-04-30 | 武汉武新新型建材有限公司 | Waterproof plastering mortar slurry doped with mineral powder |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110330274A (en) * | 2019-06-21 | 2019-10-15 | 万红梅 | A kind of preparation method of high-strength dry powder mortar |
| CN111848043A (en) * | 2020-07-28 | 2020-10-30 | 中铁隧道局集团有限公司 | Flame-retardant cement-based capillary crystalline waterproof coating and preparation method thereof |
| CN112456935A (en) * | 2020-11-30 | 2021-03-09 | 武汉武新新型建材股份有限公司 | Wet-mixed plastering mortar containing all-steel plant solid waste components and preparation method thereof |
| CN113698141A (en) * | 2021-07-30 | 2021-11-26 | 辽宁壹立方砂业有限责任公司 | Solid-waste high-mixing-amount ecological cement composition |
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Application publication date: 20150916 |
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