CN103979894B - A kind of fluidized bed combustion coal ash/slag cement-based material and swelling property control method thereof - Google Patents
A kind of fluidized bed combustion coal ash/slag cement-based material and swelling property control method thereof Download PDFInfo
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Abstract
The invention discloses a kind of fluidized bed combustion coal ash/slag cement-based material, obtained by 30 ~ 50 parts of cement, 50 ~ 70 parts of fluidized bed combustion coal ash/slags, 0.18 ~ 0.84 part of hydroxypropyl methyl cellulose ether and 60 ~ 120 parts of water, the finished product have good volume stability, lower apparent density and good thermal and insulating performance.The invention also discloses a kind of swelling property control method of fluidized bed combustion coal ash/slag cement-based material, specifically comprise the following steps: 1) take each raw material according to above-mentioned fluidized bed combustion coal ash/slag cement-based material; 2) cement, fluidized bed combustion coal ash/slag and hydroxypropyl methyl cellulose ether are mixed; 3) slowly add water and stir at least 5min; 4) normal temperature and pressure maintenance 24h rear demoulding obtains fluidized bed combustion coal ash/slag cement-based material.Such operation steps can be carried out at normal temperature and pressure, and workable, products obtained therefrom may be used for building energy saving field; And be raw material with fluidized bed combustion coal ash/slag, decrease the pollution of fluidized bed combustion coal ash/slag to environment, achieve the recycling of fluidized bed combustion coal ash/slag.
Description
Technical field
The present invention relates to building material technical field, be specifically related to a kind of fluidized bed combustion coal ash/slag cement-based material and swelling property control method thereof.
Background technology
Along with the reinforcement of national environmental protection dynamics, clean coal combustion technology is the inexorable trend of social development.Circulating fluidized bed combustion coal solid sulfur technology, because of advantages such as its investment is little, transformation convenient, desulfurization degree is high, flammable low grade coals, obtains large-area applying; But can produce a large amount of by product and the higher solid sulfur ash of sulphur content and CFB residues, do not have comparatively suitable recycling approach at present, a large amount of solid sulfur ash lime-ash is in stacking state, therefore requires more and more urgent to the recycling of fluidized bed combustion coal ash/slag thereupon.
The existing performance study about fluidized bed combustion coal ash/slag at present, as " microtexture of fluidized bed combustion coal ash/slag and pozzolanic reaction characteristic " (silicate journal, volume the 12nd phase December the 34th in 2006) literary composition, discuss fluidized bed combustion coal ash/slag and there is the pozzolanic activity also higher than flyash and less reaction resistance, therefore fluidized bed combustion coal ash/slag is prepared cement-based material as gelling material and there is larger utility value, and be a kind of approach of good recycling.But fluidized bed combustion coal ash/slag contains a large amount of dehydrated gyp-II-CaSO
4with a certain amount of free calcium oxide f-CaO, dehydrated gyp-II-CaSO after aquation
4generate dihydrate gypsum, free calcium oxide f-CaO generates Ca (OH)
2, and the dihydrate gypsum generated and Ca (OH)
2can also with active A l
2o
3there is pozzolanic reaction and generate ettringite generation volumetric expansion, the hydration rate of dehydrated gyp-than dihydrate gypsum and natural anhydrite much slow, solubleness is also higher than dihydrate gypsum, when causing fluidized bed combustion coal ash/slag for cement-based material, after setting and harden still there is a large amount of unhydrated dehydrated gyp-in inside, there is the risk generating dihydrate gypsum and delaying type ettringite in the later stage, is the major reason causing cement-based material volume stability bad.At present for ensureing the volume stability being mixed with the cement-based material of fluidized bed combustion coal ash/slag, the volume of fluidized bed combustion coal ash/slag is less, and system sulfur trioxide content controls within 3.5%.Therefore, control fluidized bed combustion coal ash/slag cement-based material swelling property and become the technical barrier improving fluidized bed combustion coal ash/slag utilization ratio.
The expansile research of existing control fluidized bed combustion coal ash/slag cement-based material at present, if application number is 200910103640.4 " a kind of method suppressing expansion of fluidized bed combustion coal ash/slag products " patent, disclose a kind of method suppressing expansion of fluidized bed combustion coal ash/slag products, the raw material being mainly consolidating material with fluidized bed combustion coal ash/slag, cement clinker, cement, after levigate to grain block stock, add sand to gather materials and mixing water, stir shaping after obtain finished product through steam press maintenance again; The method changes the Hydration of solid sulfur ash cement by steam press maintenance, and result shows the repression of swelling of fluidized bed combustion coal ash/slag products effective, and early strength significantly improves.But the method needs to adopt steam press maintenance, needs autoclave equipment, restricted application.
Summary of the invention
For prior art above shortcomings, the technical problem to be solved in the present invention is to provide that a kind of cost is low, and volumetric expansion is little, the simple fluidized bed combustion coal ash/slag cement-based material of preparation method; Another technical problem that the present invention will solve is to provide the swelling property control method of the simple fluidized bed combustion coal ash/slag cement-based material of a kind of technique.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of fluidized bed combustion coal ash/slag cement-based material, is characterized in that, obtained by cement, fluidized bed combustion coal ash/slag, water and hydroxypropyl methyl cellulose ether, with weight parts, the consumption of each raw material is: cement 30 ~ 50 parts, fluidized bed combustion coal ash/slag 50 ~ 70 parts, 75 ~ 120 parts, water, thickening material 0.18 ~ 0.84 part.
This programme utilizes the hydraulicity of fluidized bed combustion coal ash/slag itself, by itself and cement, thickening material and water with the use of, fluidized bed combustion coal ash/slag recycling can be realized, wherein the consumption of water is 75 ~ 120 mass parts, cement is 30 ~ 50 parts, fluidized bed combustion coal ash/slag is 50 ~ 70 parts, water cement ratio is the mass ratio that 0.75 ~ 1.2(water cement ratio refers to water and ash content, wherein the quality of ash content refers to the total mass of cement and fluidized bed combustion coal ash/slag), in fluidized bed combustion coal ash/slag, to have dissolution rate slow for dehydrated gyp-, the feature that solubleness is low, when after the consumption increasing water in system, solid sulfur ash water requirement can be met large, make its abundant aquation in early days, improve dehydrated gyp-and the early stage meltage of free calcium oxide, thus reduce the bad risk of the volume stability that causes of late expansion, and improve fluidized bed combustion coal ash/slag cement slurry water cement ratio, moisture unnecessary after aquation can volatilize gradually, the hole of a large amount of fine uniform is formed in hardening of cement system, can be calcium hydroxide that fluidized bed combustion coal ash/slag aquation generates and the swelling property product such as ettringite provides sufficient growth and spatial accommodation, effectively can not only eliminate the expansion damage phenomenon of fluidized bed combustion coal ash/slag cement-based material under wet environment, a large amount of contractions that high water-cement ratio under drying conditions causes system can also be compensated, high water can form a large amount of holes than moisture too much in situation in hardening of cement slurry simultaneously, and the hole of introducing reduces the apparent density of sclerosis system, and thermal and insulating performance is significantly improved.The method of adding the pore-creating such as whipping agent and air entrapment agent is better than by the method for moisture introducing hole, because moisture can the dispersion of stable and uniform in slurry, the method such as whipping agent and air entrapment agent is there will not be to introduce the problems such as the breaking of bubble, merging, the aperture formed, at micron order, is less than the grade aperture that the method such as whipping agent and air entrapment agent is formed.Therefore, when equal densities grade, higher intensity can be had.And employing moisture introduces the method that hole is more economical and convenient.Therefore, the fluidized bed combustion coal ash/slag cement-based material utilizing high water-cement ratio to prepare can widespread use in building energy saving field.
Because the simple water cement ratio that improves can bring slurry excreting water phenomenon in moulding process, reduce Forming Quality, this programme employing is added thickening material and is improved it.What in this programme, thickening material adopted is current most widely used hydroxypropyl methyl cellulose ether HPMC in sand-cement slurry.After hydroxypropyl methyl cellulose ether in solid sulfur ash cement paste dissolves in water; because surface-active action ensure that gelling material is effectively uniformly distributed in system; and ether of cellulose is as a kind of protective colloid; " parcel " lives solid particulate; and form one deck lubricant film at its outside surface; make clean slurry system more stable, also improve and only starch in the mobility of whipping process and the plasticity-of construction.Hydroxypropyl methyl cellulose ether contains hydrophobic main chain simultaneously, hydrophobic main chain can pass through hydrogen bond association with the water molecules in system, improve the fluid volume of cellulose ethers thickening material self, the free activity space of particle in minimizing system, thus improve viscosity and the water-retentivity of system, under can preventing high water-cement ratio condition there is excreting water phenomenon in fluidized bed combustion coal ash/slag cement-based material in moulding process.
As optimization, described cement is silicate cement.
Using conventional general purpose portland cement as base-material in this programme, preferred 42.5R ordinary Portland cement, itself and fluidized bed combustion coal ash/slag, water and thickening material with the use of, the fluidized bed combustion coal ash/slag cement-based material finally obtained can be made to have good mechanical property and volume stability, the performance index of apparent density in " light aggregate concrete technical regulation " JGJ51-2002 and ultimate compression strength can be met, can use as lightweight, energy saving building material.
As optimization, described fluidized bed combustion coal ash/slag is the mixture of solid sulfur ash, CFB residues or solid sulfur ash and CFB residues, and its specific surface area is for being greater than 280m
2/ kg; Can be original state solid sulfur ash, or levigate after solid sulfur ash and CFB residues.
In this programme, fluidized bed combustion coal ash/slag derives from fluidized bed combustion coal-fired plant, and its specific surface area is greater than 280m
2/ kg, activity is comparatively large, can abundant aquation in early days, improves dehydrated gyp-and the early stage meltage of f-CaO, thus reduces the bad risk of volume stability that late expansion causes.
As optimization, described thickening material is hydroxypropyl methyl cellulose ether HPMC, and its viscosity is 100000 ~ 200000MPa.s.
In this programme, using hydroxypropyl methyl cellulose ether as thickening material, its viscosity is 100000 ~ 200000MPa.s, there is good water solubility, surfactivity is high and water retaining efficiency is high advantage, the viscosity of system can be improved significantly, to system, there is good water conservation, thickening power, prevent from only starching bleeding.
As optimization, described fluidized bed combustion coal ash/slag cement-based material is obtained by cement, fluidized bed combustion coal ash/slag, water and hydroxypropyl methyl cellulose ether, with weight parts, the consumption of each raw material is: cement 35 ~ 45 parts, fluidized bed combustion coal ash/slag 55 ~ 65 parts, 75 ~ 90 parts, water, hydroxypropyl methyl cellulose ether 0.28 ~ 0.45 part.
In this programme, cement 35 ~ 45 parts, fluidized bed combustion coal ash/slag 55 ~ 65 parts, 75 ~ 90 parts, water, hydroxypropyl methyl cellulose ether 0.28 ~ 0.45 part, the proportioning between each like this component reaches best, and the volume stability of the fluidized bed combustion coal ash/slag cement-based material obtained, ultimate compression strength and apparent density are best.
A swelling property control method for fluidized bed combustion coal ash/slag cement-based material, is characterized in that, this swelling property control method specifically comprises the following steps:
1) consumption of each raw material of fluidized bed combustion coal ash/slag cement-based material is: cement 30 ~ 50 parts, fluidized bed combustion coal ash/slag 50 ~ 70 parts, 75 ~ 120 parts, water, and hydroxypropyl methyl cellulose ether 0.18 ~ 0.84 part, takes each raw material in above ratio, for subsequent use;
2) cement step 1) taken, fluidized bed combustion coal ash/slag and hydroxypropyl methyl cellulose ether adopt dry mix to mix;
3) to step 2) add the water that step 1) takes in the mixture that obtains, stir and slowly add water, at least stir 5min, obtain slurry;
4) slurry that step 3) obtains is poured into mould, at normal temperatures and pressures after maintenance 24h, demoulding; Maintenance, to the required length of time, namely obtains fluidized bed combustion coal ash/slag cement-based material in atmosphere again.
Using 30 ~ 50 mass parts cement and 50 ~ 70 mass parts fluidized bed combustion coal ash/slags as gelling material in this programme, the gelling material of such proportioning make use of pozzolanic activity and the hydraulicity of fluidized bed combustion coal ash/slag fully, and this amount ranges can reduce the bad risk of volume stability that late expansion causes, makes the intensity of final material reach the highest.And first cement and fluidized bed combustion coal ash/slag are mixed, make the hydrated product of generation be uniformly distributed in sclerosis system, be conducive to system strength development and swelling property control.
This programme is using hydroxypropyl methyl cellulose ether as thickening material, dry mix is adopted to mix with cement and fluidized bed combustion coal ash/slag, can avoid because stir insufficient or directly add in cold water the phenomenon that caking parcel occurs when causing hydroxypropyl methyl cellulose ether to dissolve like this, and the mass ratio of thickening material hydroxypropyl methyl cellulose ether and water is 0.003 ~ 0.007:1, when water cement ratio is higher, eliminate the miserable amount that bleeding problem also needs to improve thickening material, the hydroxypropyl methyl cellulose ether of such consumption can eliminate the excreting water phenomenon that high water-cement ratio (water cement ratio is 0.75 ~ 1.2) brings, your viscosity of increase system, improve water-retentivity, can effectively prevent high water-cement ratio from bringing bleeding problem in slurry moulding process.
This programme step 3) adds water in system, and water cement ratio is 0.75 ~ 1.2:1, adopts to stir slowly to add water, and churning time is not less than 5min.On the one hand, water cement ratio is the water requirement that the amount of water of 0.75 ~ 1.2:1 can meet fluidized bed combustion coal ash/slag, make its abundant aquation in early days, too much moisture can form a large amount of holes in fluidized bed combustion coal ash/slag hardening of cement system simultaneously, can hold the swelling property hydrated products such as the calcium hydroxide of generation and ettringite, and the hole introduced reduces the apparent density of sclerosis system; On the other hand, employing is stirred and is slowly added water, and the phenomenon that the agitation condition that churning time is not less than 5min can avoid material conglomeration balling-up in slurry uneven with dispersion.
The required length of time in this programme step 4) is that test test specimen changes to characterize its free linear expansion rate in time, the length of time be exactly test specimen from time shaping to the time used during the free linear expansion rate of test.
As optimization, described fluidized bed combustion coal ash/slag is the mixture of solid sulfur ash, CFB residues or solid sulfur ash and CFB residues, and its specific surface area is greater than 280m
2/ kg.
In this programme, the specific surface area of fluidized bed combustion coal ash/slag is greater than 280m
2/ kg, its activity is comparatively large, can abundant aquation in early days, improves dehydrated gyp-and the early stage meltage of f-CaO, thus reduces the bad risk of volume stability that late expansion causes.
Compared with prior art, the present invention has following beneficial effect:
1, the present invention take fluidized bed combustion coal ash/slag as raw material, the pozzolanic activity utilizing it higher and the hydraulicity and cement with the use of, respective strengths requirement is met while making final product have lower apparent density, may be used for building energy saving field, decrease the pollution of fluidized bed combustion coal ash/slag to environment, achieve the recycling of fluidized bed combustion coal ash/slag.
2, with cement, fluidized bed combustion coal ash/slag, water and hydroxypropyl methyl cellulose ether for raw material, by between each component with the use of, improve the volumetric expansion with CFB residues ash concrete sill goods under volume, the expansion of goods is controlled in harmless scope, make the finished product have lower apparent density and good mechanical property; This is owing to having a large amount of holes in hardening of cement process, these holes can hold the swelling property hydrated product that fluidized bed combustion coal ash/slag aquation produces, and greatly reduce the apparent density of system, simultaneously swelling property hydrated product compensate for the serious defect of contraction that high water-cement ratio brings at dry environment, and then improves intensity.
3, the add-on of fluidized bed combustion coal ash/slag is 50 ~ 70 mass parts, its utilization ratio in cement is improved, in system, the upper limit of sulfur trioxide content is increased to 6.5%, higher than national current standards, gelling material sulfur trioxide content is less than to the requirement of 3.5%, therefore, high water-cement ratio technological line has potential advantages for raising fluidized bed combustion coal ash/slag utilization ratio.。
4, the fluidized bed combustion coal ash/slag cement-based material apparent density that the present invention obtains significantly reduces, and apparent density is 1.098 ~ 1.140g/cm
3; Thermal and insulating performance improves simultaneously, and have comparatively wide application prospect in building energy saving field, the recycling for fluidized bed combustion coal ash/slag provides new approach.
5, the swelling property control method of fluidized bed combustion coal ash/slag cement-based material in the present invention, can carry out at normal temperatures and pressures, and technique is simple, and cost is low, is suitable for industrial applications.
Embodiment
Below in conjunction with specific embodiment, the present invention is described further.
It should be noted that, the consumption of embodiment Raw all adopts mass fraction to calculate.
embodiment 1:
A swelling property control method for fluidized bed combustion coal ash/slag cement-based material, specifically comprises the following steps:
1) 45 parts of 42.5R ordinary Portland cements, 55 parts of fluidized bed combustion coal ash/slags, 75 parts of water and 0.28 part of hydroxypropyl methyl cellulose ether are taken; Wherein fluidized bed combustion coal ash/slag fluidized bed combustion coal ash/slag is the former ash of solid sulfur ash that circulating fluidized bed is discharged, and its specific surface area is 287m
2/ kg, the viscosity of hydroxypropyl methyl cellulose ether is 200000MPa.s;
2) cement, fluidized bed combustion coal ash/slag and the hydroxypropyl methyl cellulose ether that will take in step 1), mix with dry mix;
3) to step 2) add the water that step 1) takes in the mixture that obtains, stir and slowly add water, churning time 5min, obtain slurry;
4) slurry that step 3) obtains is poured into mould, at normal temperatures and pressures after maintenance 24h, demoulding; Maintenance, to the required length of time, namely obtains 1# fluidized bed combustion coal ash/slag cement-based material in atmosphere again.
embodiment 2:
A swelling property control method for fluidized bed combustion coal ash/slag cement-based material, specifically comprises the following steps:
1) 45 parts of 42.5R ordinary Portland cements, 55 parts of fluidized bed combustion coal ash/slags, 90 parts of water and 0.45 part of hydroxypropyl methyl cellulose ether are taken; Wherein fluidized bed combustion coal ash/slag is the former ash of solid sulfur ash that circulating fluidized bed is discharged, and its specific surface area is 350m
2/ kg, the viscosity of hydroxypropyl methyl cellulose ether is 150000MPa.s;
2) cement, fluidized bed combustion coal ash/slag and the hydroxypropyl methyl cellulose ether that will take in step 1), mix with dry mix;
3) to step 2) add the water that step 1) takes in the mixture that obtains, stir and slowly add water, churning time 8min, obtain slurry;
4) slurry that step 3) obtains is poured into mould, at normal temperatures and pressures after maintenance 24h, demoulding; Maintenance, to the required length of time, namely obtains 2# fluidized bed combustion coal ash/slag cement-based material in atmosphere again.
embodiment 3:
A swelling property control method for fluidized bed combustion coal ash/slag cement-based material, specifically comprises the following steps:
1) 40 parts of 42.5R ordinary Portland cements, 60 parts of fluidized bed combustion coal ash/slags, 75 parts of water and 0.28 part of hydroxypropyl methyl cellulose ether are taken; Wherein fluidized bed combustion coal ash/slag is the former ash of solid sulfur ash that circulating fluidized bed is discharged, and its specific surface area is 287m
2/ kg, the viscosity of hydroxypropyl methyl cellulose ether is 200000MPa.s;
2) cement, fluidized bed combustion coal ash/slag and the hydroxypropyl methyl cellulose ether that will take in step 1), mix with dry mix;
3) to step 2) add the water that step 1) takes in the mixture that obtains, stir and slowly add water, churning time 5min, obtain slurry;
4) slurry that step 3) obtains is poured into mould, at normal temperatures and pressures after maintenance 24h, demoulding; Maintenance, to the required length of time, namely obtains 3# fluidized bed combustion coal ash/slag cement-based material in atmosphere again.
embodiment 4:
A swelling property control method for fluidized bed combustion coal ash/slag cement-based material, specifically comprises the following steps:
1) 40 parts of 42.5R ordinary Portland cements, 60 parts of fluidized bed combustion coal ash/slags, 90 parts of water and 0.45 part of hydroxypropyl methyl cellulose ether are taken; Wherein fluidized bed combustion coal ash/slag fluidized bed combustion coal ash/slag is the former ash of solid sulfur ash that circulating fluidized bed is discharged, and its specific surface area is 350m
2/ kg, the viscosity of hydroxypropyl methyl cellulose ether is 150000MPa.s;
2) cement, fluidized bed combustion coal ash/slag and the hydroxypropyl methyl cellulose ether that will take in step 1), mix with dry mix;
3) to step 2) add the water that step 1) takes in the mixture that obtains, stir and slowly add water, churning time 8min, obtain slurry;
4) slurry that step 3) obtains is poured into mould, at normal temperatures and pressures after maintenance 24h, demoulding; Maintenance, to the required length of time, namely obtains 4# fluidized bed combustion coal ash/slag cement-based material in atmosphere again.
embodiment 5:
A swelling property control method for fluidized bed combustion coal ash/slag cement-based material, specifically comprises the following steps:
1) 35 parts of 42.5R ordinary Portland cements, 65 parts of fluidized bed combustion coal ash/slags, 75 parts of water and 0.28 part of hydroxypropyl methyl cellulose ether are taken; Wherein fluidized bed combustion coal ash/slag is the former ash of solid sulfur ash that circulating fluidized bed is discharged, and its specific surface area is 287m
2/ kg, the viscosity of hydroxypropyl methyl cellulose ether is 150000MPa.s;
2) cement step 1) taken, fluidized bed combustion coal ash/slag and hydroxypropyl methyl cellulose ether, mix with dry mix;
3) to step 2) add the water that step 1) takes in the mixture that obtains, stir and slowly add water, churning time 5min, obtain slurry;
4) slurry that step 3) obtains is poured into mould, at normal temperatures and pressures after maintenance 24h, demoulding; Maintenance, to the required length of time, namely obtains # fluidized bed combustion coal ash/slag cement-based material in atmosphere again.
embodiment 6:
A swelling property control method for fluidized bed combustion coal ash/slag cement-based material, specifically comprises the following steps:
1) 35 parts of 42.5R ordinary Portland cements, 65 parts of fluidized bed combustion coal ash/slags, 90 parts of water and 0.45 part of hydroxypropyl methyl cellulose ether are taken; Wherein fluidized bed combustion coal ash/slag is solid sulfur ash and the mixture of CFB residues after grinding machine grinding, and its specific surface area is 350m
2/ kg, the viscosity of hydroxypropyl methyl cellulose ether is 100000MPa.s;
2) cement, fluidized bed combustion coal ash/slag and the hydroxypropyl methyl cellulose ether that will take in step 1), mix with dry mix;
3) to step 2) add the water that step 1) takes in the mixture that obtains, stir and slowly add water, churning time 5min, obtain slurry;
4) slurry that step 3) obtains is poured into mould, at normal temperatures and pressures after maintenance 24h, demoulding; Maintenance, to the required length of time, namely obtains 6# fluidized bed combustion coal ash/slag cement-based material in atmosphere again.
performance test:
1# ~ 6# fluidized bed combustion coal ash/slag cement based sample prepared by above-described embodiment 1 ~ 6 and carry out performance test; Employing is simultaneously built shaping mode and is prepared a# and b# fluidized bed combustion coal ash/slag cement based sample as a comparison case, and the mass fraction of the component wherein in a# and each component is: 42.5R ordinary Portland cement 45 parts, fluidized bed combustion coal ash/slag 55 parts and 30 parts, water; The mass fraction of the component in b# and each component is: 42.5R ordinary Portland cement 35 parts, fluidized bed combustion coal ash/slag 56 parts and 30 parts, water.
The free linear expansion rate of 8 samples that aforesaid method is obtained, folding strength and apparent density, wherein the test of free linear expansion rate is carried out with reference to JC/T313 mono-52 (1996) " the expansive cement rate of expansion method of inspection ", and the maintenance method of test sample is maintenance in water; Ultimate compression strength and apparent density test with reference to GB/T17671-1996 " Test method for strength of hydraulic cement mortar (ISO method) " carry out, the maintenance method of intensity test sample is air care, and test result is as shown in table 1:
As can be seen from Table 1:
1, the fluidized bed combustion coal ash/slag cement-based articles that the present invention obtains significantly can suppress the expansion of fluidized bed combustion coal ash/slag cement products under moisture sufficiency.Fluidized bed combustion coal ash/slag is with under volume condition, and the linear expansion rate of the sample that the present invention obtains is only about 10/10000ths; And the linear expansion rate of the sample that comparative example obtains reaches 20/10000ths.
2, the apparent density of fluidized bed combustion coal ash/slag cement-based articles that the present invention obtains reduces obviously, from 1.9g/cm
3be reduced to 1.1g/cm
3ultimate compression strength is about 10 ~ 12MPa, meet " light aggregate concrete technical regulation " density of JGJ51-90 and the performance index of intensity, therefore, the gelling material that can be used as preparation light aggregate concrete, for preparing high water-cement ratio light aggregate concrete, can have comparatively wide application prospect in building energy saving field.
Finally it should be noted that, above embodiment is only in order to illustrate technical scheme of the present invention but not restriction technologies scheme, those of ordinary skill in the art is to be understood that, those are modified to technical scheme of the present invention or equivalent replacement, and do not depart from aim and the scope of the technical program, all should be encompassed in the middle of right of the present invention.
Claims (4)
1. a fluidized bed combustion coal ash/slag cement-based material, is characterized in that, is obtained by cement, fluidized bed combustion coal ash/slag, water and hydroxypropyl methyl cellulose ether, with weight parts, the consumption of each raw material is: cement 30 ~ 50 parts, fluidized bed combustion coal ash/slag 50 ~ 70 parts, 75 ~ 120 parts, water, thickening material 0.18 ~ 0.84 part; Described cement is silicate cement; Described fluidized bed combustion coal ash/slag is the mixture of solid sulfur ash, CFB residues or solid sulfur ash and CFB residues, and its specific surface area is greater than 280m
2/ kg.
2. fluidized bed combustion coal ash/slag cement-based material according to claim 1, is characterized in that, described thickening material is hydroxypropyl methyl cellulose ether HPMC, and its viscosity is 100000 ~ 200000MPa.s.
3. fluidized bed combustion coal ash/slag cement-based material according to claim 2, it is characterized in that, described fluidized bed combustion coal ash/slag cement-based material is obtained by cement, fluidized bed combustion coal ash/slag, water and hydroxypropyl methyl cellulose ether, with weight parts, the consumption of each raw material is: cement 35 ~ 45 parts, fluidized bed combustion coal ash/slag part 55 ~ 65,75 ~ 90 parts, water, hydroxypropyl methyl cellulose ether 0.28 ~ 0.45 part.
4. a swelling property control method for fluidized bed combustion coal ash/slag cement-based material, is characterized in that, this swelling property control method specifically comprises the following steps:
1) in fluidized bed combustion coal ash/slag cement-based material, the consumption of each raw material is: cement 30 ~ 50 parts, fluidized bed combustion coal ash/slag 50 ~ 70 parts, 75 ~ 120 parts, water, and hydroxypropyl methyl cellulose ether 0.18 ~ 0.84 part, takes each raw material in above ratio, for subsequent use; Described fluidized bed combustion coal ash/slag is the mixture of solid sulfur ash, CFB residues or solid sulfur ash and CFB residues, and its specific surface area is greater than 280m
2/ kg;
2) cement step 1) taken, fluidized bed combustion coal ash/slag and hydroxypropyl methyl cellulose ether adopt dry mix to mix;
3) to step 2) add the water that step 1) takes in the mixture that obtains, stir and slowly add water, at least stir 5min, obtain slurry;
4) slurry that step 3) obtains is poured into mould, at normal temperatures and pressures after maintenance 24h, demoulding; Maintenance, to the required length of time, namely obtains fluidized bed combustion coal ash/slag cement-based material in atmosphere again.
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| CN108821662B (en) * | 2018-07-26 | 2021-08-27 | 华东理工常熟研究院有限公司 | Method for preparing highway subgrade material by using desulfurization ash of circulating fluidized bed boiler |
| CN115448676B (en) * | 2022-10-11 | 2023-10-13 | 南京理工大学 | Fluidized bed solid sulfur ash artificial lightweight aggregate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BG65019B1 (en) * | 2001-08-10 | 2006-12-29 | "Денеб" Ад | Heat insulation building material |
| CN101544015A (en) * | 2009-04-20 | 2009-09-30 | 四川白马循环流化床示范电站有限责任公司 | Method for inhibiting expansion of fluidized bed combustion coal ash/slag products |
| CN102442792A (en) * | 2010-10-12 | 2012-05-09 | 廉慧珍 | Method for preparing low shrinkage-expansion cement (cement concrete expansion agent) by using calcium-base desulphurization product and fluidized bed coal-fired furnace ashes |
| CN102515673A (en) * | 2011-12-15 | 2012-06-27 | 西南科技大学 | Circulating fluidized bed boiler ash cement-based self-leveling material |
| CN103274655A (en) * | 2013-05-17 | 2013-09-04 | 西南科技大学 | Solid sulfur ash masonry mortar |
| CN103387412A (en) * | 2013-07-18 | 2013-11-13 | 烟台大学 | Method for producing aerated concrete with refuse incinerator slag and sulfur fixation ash |
-
2014
- 2014-05-20 CN CN201410213521.5A patent/CN103979894B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BG65019B1 (en) * | 2001-08-10 | 2006-12-29 | "Денеб" Ад | Heat insulation building material |
| CN101544015A (en) * | 2009-04-20 | 2009-09-30 | 四川白马循环流化床示范电站有限责任公司 | Method for inhibiting expansion of fluidized bed combustion coal ash/slag products |
| CN102442792A (en) * | 2010-10-12 | 2012-05-09 | 廉慧珍 | Method for preparing low shrinkage-expansion cement (cement concrete expansion agent) by using calcium-base desulphurization product and fluidized bed coal-fired furnace ashes |
| CN102515673A (en) * | 2011-12-15 | 2012-06-27 | 西南科技大学 | Circulating fluidized bed boiler ash cement-based self-leveling material |
| CN103274655A (en) * | 2013-05-17 | 2013-09-04 | 西南科技大学 | Solid sulfur ash masonry mortar |
| CN103387412A (en) * | 2013-07-18 | 2013-11-13 | 烟台大学 | Method for producing aerated concrete with refuse incinerator slag and sulfur fixation ash |
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| CN103979894A (en) | 2014-08-13 |
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