CN103979894A - Sulfur-fixing ash cement-based material and expansibility control method thereof - Google Patents
Sulfur-fixing ash cement-based material and expansibility control method thereof Download PDFInfo
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- CN103979894A CN103979894A CN201410213521.5A CN201410213521A CN103979894A CN 103979894 A CN103979894 A CN 103979894A CN 201410213521 A CN201410213521 A CN 201410213521A CN 103979894 A CN103979894 A CN 103979894A
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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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a sulfur-fixing ash cement-based material. The sulfur-fixing ash cement-based material comprises 30-50 parts of cement, 50-70 parts of sulfur-fixing ash, 0.18-0.84 part of hydroxypropyl methyl cellulose ether and 60-120 parts of water. The final product has good volume stability, low performance density and good heat insulation performance. The invention also discloses an expansibility control method for the sulfur-fixing ash cement-based material. The method comprises the following specific steps: (1) weighing all the raw materials according to the sulfur-fixing ash cement-based material; (2) uniformly mixing the cement, sulfur-fixing ash and hydroxypropyl methyl cellulose ether; (3) slowly adding water and stirring for at least 5 minutes; (4) curing for 24 hours at normal pressure and temperature, then demoulding to obtain the sulfur-fixing ash cement-based material. The steps can be carried out at normal pressure and temperature and have strong operability; the prepared sulfur-fixing ash cement-based material can be used in the building energy conservation field, and takes the sulfur-fixing ash as the raw material, so that the pollution of the sulfur-fixing ash to the environment is reduced, and recycling of the sulfur-fixing ash is realized.
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, has obtained large-area applying; But can produce a large amount of by products thereupon, be solid sulfur ash and the solid sulphur slag that sulphur content is higher, there is no comparatively suitable recycling approach at present, a large amount of solid sulfur ash lime-ash, in stacking state, therefore require more and more urgent to the recycling of fluidized bed combustion coal ash/slag.
Have at present the performance study about fluidized bed combustion coal ash/slag, as the microtexture of < < fluidized bed combustion coal ash/slag and pozzolanic reaction characteristic > > (silicate journal, the 34th the 12nd phase of volume of December in 2006) literary composition, having discussed fluidized bed combustion coal ash/slag has than flyash also high pozzolanic activity and less reaction resistance, therefore fluidized bed combustion coal ash/slag is prepared to 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 and the Ca (OH) that generate
2can also with active A l
2o
3there is pozzolanic reaction and generate ettringite generation volumetric expansion, the hydration rate of dehydrated gyp-is much slower than dihydrate gypsum and natural anhydrite, solubleness is also higher than dihydrate gypsum, while causing fluidized bed combustion coal ash/slag for cement-based material, after setting and harden still there are a large amount of unhydrated dehydrated gyp-s in inside, in the later stage, having the risk that generates dihydrate gypsum and delaying type ettringite, is to cause the bad major reason of cement-based material volume stability.For assurance, be mixed with at present the volume stability of 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 is controlled in 3.5%.Therefore, control fluidized bed combustion coal ash/slag cement-based material swelling property and become the technical barrier that improves 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 the method > > patent that mono-kind of 200910103640.4 < < suppresses expansion of fluidized bed combustion coal ash/slag products, a kind of method that suppresses expansion of fluidized bed combustion coal ash/slag products is disclosed, main take the raw material that fluidized bed combustion coal ash/slag, cement clinker, cement be consolidating material, after levigate to the block raw material of grain, add sand to gather materials and mixing water, after stirring moulding, through steam press maintenance, make finished product again; The method changes the Hydration of solid sulfur ash cement by steam press maintenance, result shows the repression of swelling of fluidized bed combustion coal ash/slag products effective, and early strength obviously improves.But the method need to adopt steam press maintenance, need 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 fluidized bed combustion coal ash/slag cement-based material, is characterized in that, by cement, fluidized bed combustion coal ash/slag, water and hydroxypropyl methyl cellulose ether, is obtained, in parts by weight, the consumption of each raw material is: 30～50 parts of cement, 50～70 parts of fluidized bed combustion coal ash/slags, 75～120 parts, water, 0.18～0.84 part of thickening material.
This programme utilizes the hydraulicity of fluidized bed combustion coal ash/slag itself, and itself and cement, thickening material and water are used in conjunction with, and can realize fluidized bed combustion coal ash/slag recycling, 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, in system, increase after the consumption of water, can meet solid sulfur ash water requirement large, make its abundant aquation in early days, improve dehydrated gyp-and the early stage meltage of free calcium oxide, thereby reduce the bad risk of volume stability that late expansion causes, and improve fluidized bed combustion coal ash/slag cement slurry water cement ratio, moisture unnecessary after aquation can volatilize gradually, in hardening of cement system, form a large amount of tiny uniform holes, can be the swelling property products such as calcium hydroxide that fluidized bed combustion coal ash/slag aquation generates and ettringite sufficient growth and spatial accommodation is provided, the expansion damage phenomenon of fluidized bed combustion coal ash/slag cement-based material under wet environment can not only be effectively eliminated, 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 has reduced the apparent density of sclerosis system, and thermal and insulating performance is significantly improved.By moisture, introduce the method that the method for hole is better than adding the pore-creating such as whipping agent and air entrapment agent, because moisture can be in slurry the dispersion of stable and uniform, there will not be the method such as whipping agent and air entrapment agent to introduce the problems such as the breaking of bubble, merging, the aperture forming, at micron order, is less than the grade aperture that the methods such as whipping agent and air entrapment agent form.Therefore when equal densities grade, can there is higher intensity.And to adopt moisture to introduce hole be the method for economical and convenient more.Therefore, utilize the fluidized bed combustion coal ash/slag cement-based material prepared by high water-cement ratio 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 it is improved.In this programme, thickening material adopts is most widely used hydroxypropyl methyl cellulose ether HPMC in sand-cement slurry at present.After hydroxypropyl methyl cellulose ether in solid sulfur ash cement paste dissolves in water; because having guaranteed gelling material, surface-active action 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 improved clean slurry in the mobility of whipping process and the plasticity-of construction.Hydroxypropyl methyl cellulose ether contains hydrophobic main chain simultaneously, hydrophobic main chain can with system in water molecules pass through hydrogen bond association, improve the fluid volume of cellulose ethers thickening material self, the free activity space of particle in minimizing system, thereby improved viscosity and the water-retentivity of system, can prevent that under high water-cement ratio condition, excreting water phenomenon appears in fluidized bed combustion coal ash/slag cement-based material in moulding process.
As optimization, described cement is silicate cement.
In this programme, using the general purpose portland cement commonly used as base-material, preferred 42.5R ordinary Portland cement, itself and fluidized bed combustion coal ash/slag, water and thickening material are used in conjunction with, can make the fluidized bed combustion coal ash/slag cement-based material finally obtaining there is good mechanical property and volume stability, can meet apparent density in < < light aggregate concrete technical regulation > > JGJ 51-2002 and the performance index of ultimate compression strength, can be used as lightweight, energy saving building material is used.
As optimization, described fluidized bed combustion coal ash/slag is the mixture of solid sulfur ash, solid sulphur slag or solid sulfur ash and solid sulphur slag, and its specific surface area is for being greater than 280m
2/ kg; Can be original state solid sulfur ash, or the solid sulfur ash after levigate and solid sulphur slag.
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 larger, and abundant aquation, improves dehydrated gyp-and the early stage meltage of f-CaO, thereby reduces the bad risk of volume stability that late expansion causes in early days.
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, can improve significantly the viscosity of system, system is had to 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, in parts by weight, the consumption of each raw material is: 35～45 parts of cement, 55～65 parts of fluidized bed combustion coal ash/slags, 75～90 parts, water, 0.28～0.45 part of hydroxypropyl methyl cellulose ether.
In this programme, 35～45 parts of cement, 55～65 parts of fluidized bed combustion coal ash/slags, 75～90 parts, water, 0.28～0.45 part of hydroxypropyl methyl cellulose ether, the proportioning between each component reaches best like this, and the volume stability of the fluidized bed combustion coal ash/slag cement-based material obtaining, 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: 30～50 parts of cement, and 50～70 parts of fluidized bed combustion coal ash/slags, 75～120 parts, water, 0.18～0.84 part of hydroxypropyl methyl cellulose ether, takes each raw material in above ratio, standby;
2) cement step 1) being taken, fluidized bed combustion coal ash/slag and hydroxypropyl methyl cellulose ether adopt dry mix to mix;
3) to step 2) water that adds step 1) to take in the mixture that obtains, while stir, slowly add water, at least stir 5min, obtain slurry;
4) slurry step 3) being obtained is poured into mould, at normal temperatures and pressures after maintenance 24h, and demoulding; In air, maintenance, to the required length of time, obtains fluidized bed combustion coal ash/slag cement-based material again.
In this programme, using 30～50 mass parts cement and 50～70 mass parts fluidized bed combustion coal ash/slags as gelling material, the gelling material of proportioning has been utilized pozzolanic activity and the hydraulicity of fluidized bed combustion coal ash/slag fully like this, and this amount ranges can reduce the bad risk of volume stability that late expansion causes, make the intensity of final material reach the highest.And first cement and fluidized bed combustion coal ash/slag are mixed, make the hydrated product generating be uniformly distributed in sclerosis system, be conducive to system strength development and swelling property and control.
This programme is usingd hydroxypropyl methyl cellulose ether as thickening material, adopt dry mix to mix with cement and fluidized bed combustion coal ash/slag, can avoid like this because stir insufficient or directly add in cold water and the phenomenon of caking parcel occurs while causing hydroxypropyl methyl cellulose ether to dissolve, and the mass ratio of thickening material hydroxypropyl methyl cellulose ether and water is 0.003～0.007:1, in the higher situation of water cement ratio, eliminating bleeding problem also needs to improve the miserable amount of thickening material, the hydroxypropyl methyl cellulose ether of consumption can be eliminated the excreting water phenomenon that high water-cement ratio (water cement ratio is 0.75～1.2) brings like this, your viscosity of increase system, improve water-retentivity, can effectively prevent that high water-cement ratio from bringing the bleeding problem in slurry moulding process.
This programme step 3) adds water in system, and water cement ratio is 0.75～1.2:1, slowly add water, and churning time is not less than 5min while adopt to stir.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 of introducing has reduced the apparent density of sclerosis system; On the other hand, adopt to stir on one side slowly to add water, and the agitation condition that churning time is not less than 5min can be avoided material conglomeration balling-up in slurry phenomenon uneven with dispersion.
Be that test test specimen temporal evolution characterizes its free linear expansion rate the required length of time in this programme step 4), and be exactly test specimen time used during to the free linear expansion rate of test during from moulding the length of time.
As optimization, described fluidized bed combustion coal ash/slag is the mixture of solid sulfur ash, solid sulphur slag or solid sulfur ash and solid sulphur slag, 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 larger, and abundant aquation, improves dehydrated gyp-and the early stage meltage of f-CaO, thereby reduces the bad risk of volume stability that late expansion causes in early days.
Compared with prior art, the present invention has following beneficial effect:
1, the present invention be take fluidized bed combustion coal ash/slag as raw material, utilize its higher pozzolanic activity and the hydraulicity and cement to be used in conjunction with, when making final product there is lower apparent density, meet respective strengths requirement, can be for building energy saving field, reduce the pollution of fluidized bed combustion coal ash/slag to environment, realized the recycling of fluidized bed combustion coal ash/slag.
2, take cement, fluidized bed combustion coal ash/slag, water and hydroxypropyl methyl cellulose ether as raw material, by being used in conjunction with between each component, improvement is with the volumetric expansion of solid sulphur slag ash concrete sill goods under volume, the expansion of goods is controlled in harmless scope, makes the finished product there is lower apparent density and good mechanical property; This is owing to there being 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, swelling property hydrated product has compensated the serious defect of contraction that high water-cement ratio brings at dry environment simultaneously, and then has improved 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 the requirement that gelling material sulfur trioxide content is less than to 3.5% of national current standards, therefore, high water-cement ratio technological line has potential advantages for improving fluidized bed combustion coal ash/slag utilization ratio.。
4, the resulting fluidized bed combustion coal ash/slag cement-based material of the present invention apparent density significantly reduces, and apparent density is 1.098～1.140g/cm
3; Simultaneously thermal and insulating performance improves, and in building energy saving field, has comparatively wide application prospect, for the recycling of 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) take 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; 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) by the cement taking in step 1), fluidized bed combustion coal ash/slag and hydroxypropyl methyl cellulose ether, with dry mix, mix;
3) to step 2) water that adds step 1) to take in the mixture that obtains, while stir, slowly add water, churning time 5min, obtains slurry;
4) slurry step 3) being obtained is poured into mould, at normal temperatures and pressures after maintenance 24h, and demoulding; In air, maintenance, to the required length of time, obtains 1# fluidized bed combustion coal ash/slag cement-based material again.
embodiment 2:
A swelling property control method for fluidized bed combustion coal ash/slag cement-based material, specifically comprises the following steps:
1) take 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; 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) by the cement taking in step 1), fluidized bed combustion coal ash/slag and hydroxypropyl methyl cellulose ether, with dry mix, mix;
3) to step 2) water that adds step 1) to take in the mixture that obtains, while stir, slowly add water, churning time 8min, obtains slurry;
4) slurry step 3) being obtained is poured into mould, at normal temperatures and pressures after maintenance 24h, and demoulding; In air, maintenance, to the required length of time, obtains 2# fluidized bed combustion coal ash/slag cement-based material again.
embodiment 3:
A swelling property control method for fluidized bed combustion coal ash/slag cement-based material, specifically comprises the following steps:
1) take 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; 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) by the cement taking in step 1), fluidized bed combustion coal ash/slag and hydroxypropyl methyl cellulose ether, with dry mix, mix;
3) to step 2) water that adds step 1) to take in the mixture that obtains, while stir, slowly add water, churning time 5min, obtains slurry;
4) slurry step 3) being obtained is poured into mould, at normal temperatures and pressures after maintenance 24h, and demoulding; In air, maintenance, to the required length of time, obtains 3# fluidized bed combustion coal ash/slag cement-based material again.
embodiment 4:
A swelling property control method for fluidized bed combustion coal ash/slag cement-based material, specifically comprises the following steps:
1) take 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; 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) by the cement taking in step 1), fluidized bed combustion coal ash/slag and hydroxypropyl methyl cellulose ether, with dry mix, mix;
3) to step 2) water that adds step 1) to take in the mixture that obtains, while stir, slowly add water, churning time 8min, obtains slurry;
4) slurry step 3) being obtained is poured into mould, at normal temperatures and pressures after maintenance 24h, and demoulding; In air, maintenance, to the required length of time, obtains 4# fluidized bed combustion coal ash/slag cement-based material again.
embodiment 5:
A swelling property control method for fluidized bed combustion coal ash/slag cement-based material, specifically comprises the following steps:
1) take 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; 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) being taken, fluidized bed combustion coal ash/slag and hydroxypropyl methyl cellulose ether, mix with dry mix;
3) to step 2) water that adds step 1) to take in the mixture that obtains, while stir, slowly add water, churning time 5min, obtains slurry;
4) slurry step 3) being obtained is poured into mould, at normal temperatures and pressures after maintenance 24h, and demoulding; In air, maintenance, to the required length of time, obtains # fluidized bed combustion coal ash/slag cement-based material again.
embodiment 6:
A swelling property control method for fluidized bed combustion coal ash/slag cement-based material, specifically comprises the following steps:
1) take 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; Wherein fluidized bed combustion coal ash/slag is solid sulfur ash and the mixture of solid sulphur slag after grinding machine grinding, and its specific surface area is 350m
2/ kg, the viscosity of hydroxypropyl methyl cellulose ether is 100000MPa.s;
2) by the cement taking in step 1), fluidized bed combustion coal ash/slag and hydroxypropyl methyl cellulose ether, with dry mix, mix;
3) to step 2) water that adds step 1) to take in the mixture that obtains, while stir, slowly add water, churning time 5min, obtains slurry;
4) slurry step 3) being obtained is poured into mould, at normal temperatures and pressures after maintenance 24h, and demoulding; In air, maintenance, to the required length of time, obtains 6# fluidized bed combustion coal ash/slag cement-based material again.
?
performance test:
Above-described embodiment 1～6 preparation 1#～6# fluidized bed combustion coal ash/slag cement based sample is carried out to performance test; Adopt the mode build moulding to prepare a# and b# fluidized bed combustion coal ash/slag cement based sample as a comparison case, wherein the mass fraction of the component in a# and each component is: 45 parts of 42.5R ordinary Portland cements, 30 parts, 55 parts of fluidized bed combustion coal ash/slags and water simultaneously; Component in b# and the mass fraction of each component are: 35 parts of 42.5R ordinary Portland cements, 30 parts, 56 parts of fluidized bed combustion coal ash/slags and water.
Free linear expansion rate, folding strength and the apparent density of 8 samples that aforesaid method is obtained, wherein the test of free linear expansion rate is carried out with reference to JC/T 313 1 52 (1996) < < expansive cement rate of expansion method of inspection > >, and the maintenance method of test sample is maintenance in water; Ultimate compression strength and the test of apparent density with reference to GB/T 17671-1996 < < 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 goods that the present invention obtains can significantly 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 10/10000ths left and right; And the linear expansion rate of the sample that comparative example obtains has reached 20/10000ths.
The apparent density of the fluidized bed combustion coal ash/slag cement based goods that 2, the present invention obtains reduces obviously, from 1.9g/cm
3be reduced to 1.1 g/cm
3ultimate compression strength is 10～12MPa left and right, meet the density of < < light aggregate concrete technical regulation > > JGJ 51-90 and the performance index of intensity, therefore, can be used as the gelling material of 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 or are equal to replacement technical scheme of the present invention, and do not depart from aim and the scope of the technical program, all should be encompassed in the middle of claim scope of the present invention.
Claims (7)
1. a fluidized bed combustion coal ash/slag cement-based material, is characterized in that, by cement, fluidized bed combustion coal ash/slag, water and hydroxypropyl methyl cellulose ether, is obtained, in parts by weight, the consumption of each raw material is: 30～50 parts of cement, 50～70 parts of fluidized bed combustion coal ash/slags, 75～120 parts, water, 0.18～0.84 part of thickening material.
2. fluidized bed combustion coal ash/slag cement-based material according to claim 1, is characterized in that, described cement is silicate cement.
3. fluidized bed combustion coal ash/slag cement-based material according to claim 2, is characterized in that, described fluidized bed combustion coal ash/slag is the mixture of solid sulfur ash, solid sulphur slag or solid sulfur ash and solid sulphur slag, and its specific surface area is greater than 280m
2/ kg.
4. fluidized bed combustion coal ash/slag cement-based material according to claim 3, is characterized in that, described thickening material is hydroxypropyl methyl cellulose ether HPMC, and its viscosity is 100000～200000MPa.s.
5. fluidized bed combustion coal ash/slag cement-based material according to claim 4, 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, in parts by weight, the consumption of each raw material is: 35～45 parts of cement, fluidized bed combustion coal ash/slag part 55～65,75～90 parts, water, 0.28～0.45 part of hydroxypropyl methyl cellulose ether.
6. 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: 30～50 parts of cement, and 50～70 parts of fluidized bed combustion coal ash/slags, 75～120 parts, water, 0.18～0.84 part of hydroxypropyl methyl cellulose ether, takes each raw material in above ratio, standby;
2) cement step 1) being taken, fluidized bed combustion coal ash/slag and hydroxypropyl methyl cellulose ether adopt dry mix to mix;
3) to step 2) water that adds step 1) to take in the mixture that obtains, while stir, slowly add water, at least stir 5min, obtain slurry;
4) slurry step 3) being obtained is poured into mould, at normal temperatures and pressures after maintenance 24h, and demoulding; In air, maintenance, to the required length of time, obtains fluidized bed combustion coal ash/slag cement-based material again.
7. the swelling property control method of fluidized bed combustion coal ash/slag cement-based material according to claim 6, is characterized in that, described fluidized bed combustion coal ash/slag is the mixture of solid sulfur ash, solid sulphur slag or solid sulfur ash and solid sulphur slag, and its specific surface area is greater than 280m
2/ kg.
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| CN201410213521.5A CN103979894B (en) | 2014-05-20 | 2014-05-20 | A kind of fluidized bed combustion coal ash/slag cement-based material and swelling property control method thereof |
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| CN201410213521.5A Expired - Fee Related CN103979894B (en) | 2014-05-20 | 2014-05-20 | A kind of fluidized bed combustion coal ash/slag cement-based material and swelling property control method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106946479A (en) * | 2017-04-06 | 2017-07-14 | 绵阳莫仕科技有限公司 | A kind of humble thermal expansion portland cement |
| CN108821662A (en) * | 2018-07-26 | 2018-11-16 | 华东理工常熟研究院有限公司 | The method that circulating fluid bed boiler desulfurization lime-ash prepares highway subgrade material |
| CN115448676A (en) * | 2022-10-11 | 2022-12-09 | 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106946479A (en) * | 2017-04-06 | 2017-07-14 | 绵阳莫仕科技有限公司 | A kind of humble thermal expansion portland cement |
| CN108821662A (en) * | 2018-07-26 | 2018-11-16 | 华东理工常熟研究院有限公司 | The method that circulating fluid bed boiler desulfurization lime-ash prepares highway subgrade material |
| 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 |
| CN115448676A (en) * | 2022-10-11 | 2022-12-09 | 南京理工大学 | Fluidized bed solid sulfur ash artificial lightweight aggregate |
| CN115448676B (en) * | 2022-10-11 | 2023-10-13 | 南京理工大学 | Fluidized bed solid sulfur ash artificial lightweight aggregate |
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| CN103979894B (en) | 2016-01-27 |
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