CN1785890A - Method of solidifying river selimented silt as ceramic construction material - Google Patents
Method of solidifying river selimented silt as ceramic construction material Download PDFInfo
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Abstract
The present invention discloses a method capable of utilizing hydrothermal technique to solidify river sludge and silt and make them into ceramic building materials. Said method includes the following steps: firstly, mixing river sludge and silt with auxiliary raw material containing CaO, and making the mole ratio of CaO and SiO2 in said mixed material be 0.2-1.2, adding water, stirring, forming on pressing machine, finally making hydrothermal treatment so as to obtain hydrothermal ceramic building material.
Description
Technical field
The present invention relates to a kind of production method of ceramic building material, be specifically related to utilize hydrothermal technique the shoal materials of rivers,lakes and seas to be solidified into the method for useful hydro-thermal ceramic building material.
Background technology
Because the shoal materials of rivers,lakes and seas weakens its flood control capacity greatly, the flood in rivers such as the Changjiang river, the Yellow River has caused tremendous loss for for a long time national economy and people's lives and properties.For example Weihe River flood in 2003 just makes the flood that only is equivalent to 3 or five years one chances cause the cataclysm over 50 years, and its reason mainly is because shoal materials makes downstream, the Weihe River become aboveground river, so cause disaster especially easily once meeting big flood.The lake, reservoirs etc. are because the silt alluvial makes storage capacity reduce, the silt alluvial at harbour makes the depth of water reduce, and directly influences the inward ﹠ outward of big ship.
In addition, when China manufactures traditional materials such as ceramic wall and floor bricks, clay tile and cement every year, spend a large amount of precious resources and destroy large stretch of good farmland, seriously destroy the eubiosis of the earth.
Someone proposes shoal materials is made earth goods such as brick and tile, pottery as material, or fill, buildingss such as wall, or make non-burning brick etc., as Chinese patent application text " a kind of earth material and acquisition method thereof and application " (disclosed day on March 9th, 2005, publication number CN1590341A) and Chinese patent application text " a kind of brick and tile material and acquisition method " (open day February 28 calendar year 2001, publication number CN1285332A) disclosed technology in, but because problems such as the intensity of finished product and weather resistance make this method delay effectively to be used.
Summary of the invention
The object of the present invention is to provide a kind of hydrothermal technique that utilizes that the rivers shoal materials is solidified into the method for ceramic building material, utilize shoal materials to make ceramic building material, solved the intensity of finished product and the problem of weather resistance in the prior art.
The technical solution adopted in the present invention is, utilizes hydrothermal technique that the rivers shoal materials is solidified into the method for ceramic building material, carry out according to the following steps,
At first, choose main raw material and be deposit at the middle and upper levels mud or lower sediment is husky or alluvial mud and the husky mixing of precipitation of rivers,lakes and seas shoal materials, choosing auxiliary material is the raw material that contains CaO, and above-mentioned main raw material is mixed with auxiliary material, and being chosen for of described auxiliary material makes CaO and SiO in the blended stock
2Mol ratio be 0.2～1.2, the weight of auxiliary material is 5%～40% of compound gross weight;
Then, adding the water of compound gross weight 5%～30% in above-mentioned compound, after stirring, be placed on the pressure forming machine, is compression moulding under 5MPa～40MPa at pressure;
At last, the formed body that suppresses is put into High Temperature High Pressure hydro-thermal reaction still, the saturated vapor pressure that feeds temperature and be 120 ℃～250 ℃, pressure and be 0.2MPa～5MPa carries out hydrothermal treatment consists, and hydro-thermal reaction 4～24 hours had both obtained final ceramic product.
Characteristics of the present invention also are:
Auxiliary material is selected from one or more combination of following raw material: unslaked lime, slaked lime, gypsum, cement or copper smelter slag.
Also can in compound, add the natural rock of compound total amount 10%～30%.
Also can in compound, add the inorganic dyestuff of compound total amount 2%～5%.
Method of the present invention is to utilize hydrothermal technique, method compared to existing shoal materials making material of construction, characteristics with intensity height, good endurance, can replace the traditional ceramic wall and floor bricks and the cement shore protection material of dike, not only make the shoal materials of rivers,lakes and seas become useful material, and economize on resources, reduce CO
2Discharging, is very huge to protecting the fields and keeping the effect of earth ecology equilibrated.
Description of drawings
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is that the addition of water in the mud is to hydro-thermal ceramics sample effects of tensile strength figure;
Fig. 2 is that the addition of cement is to hydro-thermal ceramics sample effects of tensile strength figure;
Fig. 3 is that the slaked lime addition is to hydro-thermal ceramics sample effects of tensile strength figure;
Fig. 4 is that the addition of cement, steel-making blast furnace slag and unslaked lime is to hydro-thermal ceramics sample effects of tensile strength figure;
Fig. 5 is that moulding pressure is to hydro-thermal ceramics sample effects of tensile strength figure;
Fig. 6 is that hydrothermal temperature is to hydro-thermal ceramics sample effects of tensile strength figure;
Fig. 7 is that the hydro-thermal reaction time is to hydro-thermal ceramics sample effects of tensile strength figure;
Fig. 8 is that the husky content that adds in the mud is to hydro-thermal ceramics sample effects of tensile strength figure;
Fig. 9 is that the Dali rock ballast content that adds in the mud is to hydro-thermal ceramics sample effects of tensile strength figure;
The dyestuff addition was to its hydro-thermal ceramics sample effects of tensile strength figure when Figure 10 was dyeing;
Figure 11 is the X diffraction analysis (XRD) that the crystalline phase of hydro-thermal ceramics sample before and after the hydrothermal treatment consists changes;
Figure 12 is the electron microscope SEM photo of hydro-thermal ceramics sample section before and after the hydrothermal treatment consists, and wherein, a is the presclerotic SEM photo of hydro-thermal, and b is the SEM photo after the hydro-thermal sclerosis;
Figure 13 is a husky combined electron microscope SEM photo in the hydro-thermal ceramics sample;
Figure 14 is sand bonded electron microscope SEM photo in the hydro-thermal ceramic product, and wherein, a demonstration combines by newly-generated crystal and sand, and b shows that middle layer and the sand by generating combines.
Embodiment
The present invention utilizes hydrothermal technique the rivers shoal materials to be solidified into the method for ceramic building material, belong to a kind of unburned, energy-conservation and help the method for environment, shoal materials with rivers,lakes and seas is a main raw material, with unslaked lime, slaked lime, gypsum, it is auxiliary material that cement or steel-making blast furnace slag etc. contains the high raw material of CaO, through mixing, moulding, hydrothermal treatment consists and make ceramic building material.
At first, choosing main raw material and auxiliary material mixes, main raw material shoal materials used in the present invention, generally include the alluvial mud on upper strata and the precipitation sand of lower floor, because its granularity is little, thus do not need special crushing process, as required, can only use the mud on upper strata or the sand of lower floor, also both can be mixed as main raw material.
Auxiliary material is chosen and is contained the higher raw material of CaO, with above-mentioned main raw material with make CaO and SiO in the blended stock after auxiliary material mixes
2Mol ratio be 0.2～1.2, the weight of auxiliary material is 5%～40% of compound gross weight, auxiliary material is chosen unslaked lime, slaked lime, gypsum, Portland cement or copper smelter slag etc. usually, according to practical situation, can select only to use wherein a kind of, or the multiple while as auxiliary material, selecting does not have the requirement of content when multiple between each composition.
For the outward appearance that makes the hydro-thermal ceramic product near natural rock, can give in the above-mentioned blended stock according to demand and add natural rubble, for example granularity is the marble of 0.5mm～10mm and grouan etc., adding the granularity of rubble during big product can amplify, 10mm～100mm for example, add-on is generally 10%～30% of compound total amount.
Simultaneously, in order to make the hydro-thermal ceramic product have distinct colors to be used for different occasions, also can make product present different colours to adding different inorganic dyestuffs in the blended stock, perhaps only add natural stone material and dye at its upper layer, the addition of dyestuff is 2%～5% of a compound total amount usually.
According to practical situation, its natural rock and inorganic dyestuff can only use a kind of or use multiplely simultaneously, and the interpolation of natural rock and inorganic dyestuff is little to the intensity effect of its hydro-thermal ceramic product, and the hydro-thermal ceramic product after the dyeing is difficult for fading.
Then, give the water that adds compound gross weight 5%～30% in the above-mentioned blended stock, after stirring, be placed on the pressure forming machine, at pressure is to be pressed into required type body under 5MPa～40MPa, can be little to various wall floor tiles, paving tile etc., arrive the shore protection material of rivers,lakes and seas etc. greatly.
At last, this formed body is put into High Temperature High Pressure hydro-thermal reaction still, the saturated vapor pressure that feeds temperature and be 120 ℃～250 ℃, pressure and be 0.2MPa～5MPa carries out hydrothermal treatment consists, reacts after 4～24 hours, has both obtained the hydro-thermal ceramic building material.
Embodiment 1
At first, choose rivers,lakes and seas and deposit mud at the middle and upper levels, choose slaked lime and cement as auxiliary material as main raw material, slaked lime is an industrial material, and cement is normal portland cement, and above-mentioned raw materials is mixed, slaked lime and cement account for 40% of compound gross weight, in the compound, and CaO and SiO
2Mol ratio be about 1.2 (slaked limes) and 0.8 (cement) respectively; Then, adding the water of compound gross weight 5% in above-mentioned compound, after stirring, be placed on the pressure forming machine, is the right cylinder that is pressed into φ 3cm * 2cm under the 40MPa at pressure; At last, the right cylinder that suppresses is put into High Temperature High Pressure hydro-thermal reaction still, the saturated vapor pressure that feeds temperature and be 250 ℃, pressure and be 5MPa carries out hydrothermal treatment consists, and 4 hours after drying of hydro-thermal reaction had both obtained final ceramic product.
At first, choose rivers,lakes and seas and deposit the mixing of mud and lower sediment sand at the middle and upper levels as main raw material, choose unslaked lime as auxiliary material, above-mentioned raw materials is mixed, unslaked lime accounts for 5% of compound gross weight, in the compound, and CaO and SiO
2Mol ratio be about 0.2, in compound, add the natural rock of compound total amount 30% again; Then, adding the water of compound gross weight 10% in above-mentioned compound, after stirring, be placed on the pressure forming machine, is the square body that is pressed into 10cm * 10cm * 4cm under the 30MPa at pressure; At last, the square body that suppresses is put into High Temperature High Pressure hydro-thermal reaction still, the saturated vapor pressure that feeds temperature and be 120 ℃, pressure and be 0.2MPa carries out hydrothermal treatment consists, and 24 hours after drying of hydro-thermal reaction had both obtained the embankment material of final ceramic product or rivers,lakes and seas.
Embodiment 3
At first, choose in the rivers,lakes and seas lower sediment sand and choose gypsum and copper smelter slag as auxiliary material as main raw material, above-mentioned raw materials is mixed, gypsum and copper smelter slag account for 10% of compound gross weight, in the compound, and CaO and SiO
2Mol ratio be about 0.4, in compound, add the dyestuff of compound total amount 2% again; Then, adding the water of compound gross weight 30% in above-mentioned compound, after stirring, be placed on the pressure forming machine, is the square that is pressed into 10cm * 10cm * 2cm under the 5MPa at pressure; At last, the square that suppresses is put into High Temperature High Pressure hydro-thermal reaction still, the saturated vapor pressure that feeds temperature and be 200 ℃, pressure and be 1.5MPa carries out hydrothermal treatment consists, and 20 hours after drying of hydro-thermal reaction had both obtained final ceramic product wall floor tile.
At first, choose in the rivers,lakes and seas lower sediment sand and choose slaked lime and cement as auxiliary material as main raw material, above-mentioned raw materials is mixed, slaked lime and cement account for 30% of compound gross weight, in the compound, and CaO and SiO
2Mol ratio be respectively 0.6 and 0.8, in compound, add the dyestuff of compound total amount 5% and 10% natural rock again; Then, adding the water of compound gross weight 20% in above-mentioned compound, after stirring, be placed on the pressure forming machine, is the square that is pressed into 10cm * 10cm under the 20MPa at pressure; At last, the square that suppresses is put into High Temperature High Pressure hydro-thermal reaction still, the saturated vapor pressure that feeds temperature and be 150 ℃, pressure and be 1.0MPa carries out hydrothermal treatment consists, and 10 hours after drying of hydro-thermal reaction had both obtained final ceramic product wall floor tile.
The hardening mechanism of hydro-thermal ceramic product is to generate a large amount of calcium silicate hydrate (CaO-SiO by hydro-thermal reaction in the hydro-thermal pottery
2-H
2O, i.e. CSH), particularly the crystal of tobermorite (tobermorite:5CaO6SiO25H2O) class improves its intensity.Because the crystal of the tobermorite (class) that generates is band or fibrous usually, in the hydro-thermal hardenite just as a network, can not only tightly the particle in the hydro-thermal ceramic product be drawn (binding) together, and can fill its intravital defective (for example crackle etc.) again, thereby the intensity of hydro-thermal ceramic product is improved.High-temperature high pressure water can increase CaO and SiO
2The solubleness of component is so the crystal-like formation speed of tobermorite can increase substantially.Usually tobermorite class or calcium silicate hydrate (CSH) are proportional to the intensity of this hydro-thermal ceramic product at the hydro-thermal intravital growing amount that hardens.Can see that from the crystal-like composition of tobermorite it mainly is CaO and SiO
2Generate SiO in the shoal materials of rivers,lakes and seas under the situation of water having
2Components contents higher (usually greater than 50wt%) but CaO components contents less relatively (being less than 10wt% usually), for the generation that impels tobermorite class material to improve its intensity, just must increase the CaO components contents (promptly needing to add the high auxiliary material of CaO group component) in the raw material.Its auxiliary material mainly is selected from one or more combination of unslaked lime, slaked lime, gypsum, Portland cement and copper smelter slag in this invention.CaO and SiO in raw material
2Mol ratio (the CaO/SiO of component
2) be 0.2～1.2 o'clock, the tobermorite ratio is easier to generate.
Do experiment with the silt in Weihe River, Shaanxi of Xianyang, Shanxi province city periphery below and further specify the present invention.
The shoal materials in riverbed, the Weihe River is the mud on 10～20 centimetres on upper strata, and the deposition sand that lower floor is 300～500 centimetres (its granularity is less than 0.01 centimetre) only uses upper strata mud as main raw material, SiO in the component of mud
2Accounted for 55.1wt%, and CaO has only 9.0wt%.
Fig. 1 has shown the influence of the addition of water in the mud raw material to its intensity.It uses slaked lime as auxiliary material, slaked lime is an industrial material, the content of its CaO is greater than 72.5%, the slaked lime that in the mud raw material, adds compound total amount 10%, through sneaking under the forming press of a certain amount of distilled water at 10MPa, form the right cylinder of φ 3cm * 2cm, this right cylinder is depressed reaction 12 hours at 200 ℃, the saturation steam of 1MPa, descended dry 24 hours at 70 ℃ then, both obtained final solidified sample.This solidified sample (hydro-thermal ceramics sample) is used to survey its physics and chemical property, and the measurement of its intensity is gone up with pressure break tension method (Brazilian) at Instron universal measuring machine (M1185) and measured.As can be seen from the figure, the addition of water is 5wt%, 10wt%, and when 20wt% and 30wt%, the intensity of its hydro-thermal sample reduces from increasing gradually again.
Fig. 2, the 3rd adds compound total amount (mud+cement or slaked lime) 5wt% in the mud raw material, 10wt%, 20wt%, the cement of 30wt% or 40wt% or slaked lime (mass percent) obtain the hydro-thermal ceramics sample under the condition of water 15wt%, forming pressure 20MPa, hydrothermal temperature 200 ℃ (pressure 1.5MPa) and 12 hours time.Increase the addition of cement as can be seen from Figure 2, the intensity of its sample has obtained bigger increase.To the influence of intensity, the optimum value after adding as can be seen was slaked lime 30wt% when Fig. 3 was the interpolation slaked lime.Also shown the CaO/SiO in the blended stock (mud+slaked lime or cement) on this figure
2Molar ratio, when this ratio was 0.2～1.2, intensity all had increase.
Fig. 4 has provided when adding cement (20wt%), and the steel-making blast furnace slag (is pulverized the back by 100 mesh sieves, 30wt%) and the intensity of the hydro-thermal ceramics sample during unslaked lime (20wt%).Its hydro-thermal curing condition is identical with Fig. 3.From scheming as seen, three's intensity has all surpassed 5MPa, has reached the service requirements of building materials.
Fig. 5 has illustrated the influence of moulding pressure to its hydro-thermal ceramics sample intensity.Its moulding pressure is respectively 5MPa, 10MPa, 15MPa, 20MPa, 30Mpa or 40MPa.Experiment condition is slaked lime 10wt%, water addition 10wt%, 200 ℃ of 12 hours times of hydrothermal temperature.Can find out that the moulding pressure ratio that its intensity increases from 5MPa to 20MPa is very fast, but increment rate slows down after the 20MPa.The intensity that too high helpless its hydro-thermal product of moulding pressure is described has increase significantly.
Fig. 6, the 7th, hydrothermal temperature and time are to the influence of its hydro-thermal ceramics sample intensity.Experiment condition is slaked lime 10wt%, moulding pressure 30MPa, water 10wt% and 12 hours hydro-thermal reaction time (or temperature 200 ℃).Can see that from Fig. 6 (temperature is 120,150,200 and 250 ℃) through hydrothermal treatment consists, the intensity of hydro-thermal sample has improved more than 3 times, and along with the raising of temperature, the intensity of hydro-thermal ceramics sample has improved also, illustrates that high temperature helps hydro-thermal reaction.This figure had both illustrated also that the intensity of (120 ℃) hydro-thermal ceramics sample equally also can reach requirement of strength (near 7MPa, and being higher than cement intensity) at low temperatures.Fig. 7 has shown the influence of hydro-thermal reaction time (4,8,12,24 hours) to its sample strength.The hydro-thermal reaction time, the intensity of corresponding hydro-thermal ceramics sample increased from 4 hours to 12 hours, but intensity reduces to some extent subsequently, had reflected that helpless its intensity of long reaction times increases.After equally also can seeing 4 hours, hydro-thermal reaction is almost finished, i.e. the intensity of the hydro-thermal ceramics sample maximum value that become.
Because in the shoal materials of rivers, major part be husky, when in mud this deposition sand of adding mainly has been discussed in this experiment to the influence of hydro-thermal ceramics sample intensity.In addition, in order to improve the outward appearance of hydro-thermal product, also studied the influence of giving when adding natural rock and pigment in the mud to its intensity and outward appearance.
Fig. 8 has provided and has added deposition influence to its hydro-thermal ceramics sample intensity when husky in the mud.Earlier to the slaked lime that adds 10wt% in the mud, and then to the amount that adds deposition sand in its miscellany is 20wt%, 40wt%, 60wt%, 80wt% or 100wt%.Hydrothermal reaction condition is water add-on 10wt%, moulding pressure 30MPa, 200 ℃ of temperature and 12 hours time.Can see obviously that from Fig. 8 the intensity of hydro-thermal ceramics sample does not have obvious decline when husky content reaches 40wt%, the increase with its gaza's amount later on reduces.When sediment concentration is big,, cause hydro-thermal reaction speed to descend, so intensity reduces because husky specific surface area is few.
In order to make the hydro-thermal pottery have outward appearance as the natural rock, natural marble slag (granularity 0.5～10mm) and the inorganic dyestuff after the pulverizing that adds the 10wt%～30wt% that accounts for total amount in the mud blended stock given in this test.After Fig. 9 has shown adding natural marble slag (10wt%, 20wt% or 30wt%), and Figure 10 is for adding the influence of inorganic dyestuff (2wt% or 5wt%) back to the intensity of hydro-thermal ceramics sample.The condition of hydro-thermal reaction is slaked lime 10wt%, water 10wt%, moulding pressure 30MPa, 200 ℃ of 12 hours times of temperature.Fig. 9 and 10 has shown that natural rock ballast of adding and inorganic dyestuff almost do not have influence to its intensity.
Figure 11 is the X diffraction XRD analysis comparison diagram that crystalline phase changes before and after the hydrothermal treatment consists.Hydrothermal reaction condition is slaked lime 10wt%, water 10wt%, moulding pressure 30MPa, 200 ℃ of 12 hours times of temperature.The crystalline phase of the formed body before the hydrothermal treatment consists has only illite (illite), chlorite (chlorite), feldspar (feldspars), quartzy (quartz) and calcite (calcite), after the hydrothermal treatment consists, a new phase has appearred, i.e. tobermorite (tobermorite).Explanation is just because of its generation, and the intensity of hydro-thermal ceramic product has just improved widely.
The a of Figure 12, b have provided the electron microscope SEM photo (10000 times of ratio of enlargement) of hydrothermal treatment consists these samples of front and back (same Figure 11) respectively.On scheming, can see, the crystal of the generation before hydrothermal treatment consists in the sample seldom, but generated a large amount of tobermorite crystal in the sample after the hydrothermal treatment consists, the zoned crystal of these generations (tobermorite) hauls the particle in the hydro-thermal ceramic product tightly, and has filled defective.This photo has illustrated that well the tobermorite crystal that generates has improved the intensity of hydro-thermal ceramic product.
Figure 13 is the husky electron microscope SEM photo (5000 times of ratio of enlargement) combined in the hydro-thermal ceramic product of deposition.Its condition of cure is husky addition 40wt%, slaked lime 10wt%, water 10wt%, moulding pressure 30MPa, 200 ℃ of 12 hours times of temperature.The husky as can be seen and combination of material all around gets fine.
Figure 14 is the partial enlarged drawing of Figure 13.Wherein a demonstration combines by newly-generated crystal and sand, and b shows that middle layer and the sand by generating combines.Make that by this combination the intensity of hydro-thermal ceramic product obtains increasing just.
Above-mentioned example has illustrated that the shoal materials of rivers adds the part subsidiary material by hydrothermal treatment consists, just can obtain to have intensity height and the good hydro-thermal ceramic product of security.This hydro-thermal ceramic product can be used for the shore protection material of wall floor tile, paving tile and rivers etc., has wide practical value.
The raw material that the present invention uses is mainly from the silt sediment of rivers, to be it is believed that it is that the shoal materials of public hazards has become useful material, and need not to burn till when making, energy consumption when it is made has only 1/6 of conventional ceramic wall floor tile, so low production cost, and the intensity height of hydro-thermal ceramic product (several times of cement products), security and stability is good.Hydrothermal technique also can be to the heavy metal in the raw material, and harmful and noxious substances such as Dioxins are cured (making it not stripping).Because heavy metal can be replaced the calcium in the tobermorite crystalloid structure, or the tobermorite crystalloid that harmful and noxious substance is generated wraps up and not stripping, so even the shoal materials of rivers,lakes and seas had pollution in various degree, can guarantee that also its hydro-thermal hardenite is safe and reliable.In addition, during as the anti-dike material of rivers, because its starting material mainly come from the silt sediment of rivers itself, so to biological hazards such as fish little more than cement products.
Claims (4)
1. the rivers shoal materials is solidified into the method for ceramic building material, it is characterized in that: this method is carried out according to the following steps,
At first, choose main raw material and be deposit at the middle and upper levels mud or lower sediment is husky or alluvial mud and the husky mixing of precipitation of rivers,lakes and seas shoal materials, choosing auxiliary material is the raw material that contains CaO, and above-mentioned main raw material is mixed with auxiliary material, and being chosen for of described auxiliary material makes CaO and SiO in the blended stock
2Mol ratio be 0.2～1.2, the weight of auxiliary material is 5%～40% of compound gross weight;
Then, adding the water of compound gross weight 5%～30% in above-mentioned compound, after stirring, be placed on the pressure forming machine, is compression moulding under 5MPa～40MPa at pressure;
At last, the formed body that suppresses is put into High Temperature High Pressure hydro-thermal reaction still, the saturated vapor pressure that feeds temperature and be 120 ℃～250 ℃, pressure and be 0.2MPa～5MPa carries out hydrothermal treatment consists, and hydro-thermal reaction 4～24 hours had both obtained final ceramic product.
2. it is characterized in that in accordance with the method for claim 1: described auxiliary material is selected from one or more combination of following raw material: unslaked lime, slaked lime, gypsum, cement or copper smelter slag.
3. it is characterized in that in accordance with the method for claim 1: the natural rock that in compound, can add compound total amount 10%～30%.
4. according to claim 1 or 3 described methods, it is characterized in that: the inorganic dyestuff that in compound, can add compound total amount 2%～5%.
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| CN101279838B (en) * | 2008-04-25 | 2010-06-09 | 陕西科技大学 | Method for preparing water-permeable brick with riverbed deposited sand and mud |
| CN101844906A (en) * | 2010-04-15 | 2010-09-29 | 同济大学 | Method for preparing sediment mud and sand into high-intensity building materials through improving activity by calcination |
| CN101481228B (en) * | 2008-01-08 | 2011-07-27 | 中欣工程行股份有限公司 | Method for sintering stiffener from waste sludge |
| CN102431081A (en) * | 2011-09-01 | 2012-05-02 | 同济大学 | Method for solidifying river sediment into building material under normal pressure |
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| CN1149038A (en) * | 1996-08-29 | 1997-05-07 | 新疆大地墙体材料开发公司 | Mud ceramic granules and its production |
| JP2000219566A (en) * | 1999-01-29 | 2000-08-08 | Japan Sewage Works Agency | Production of ceramic building material |
| CN1285332A (en) * | 1999-08-18 | 2001-02-28 | 任文林 | Brick and tile material and method of collecting same |
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| CN101481228B (en) * | 2008-01-08 | 2011-07-27 | 中欣工程行股份有限公司 | Method for sintering stiffener from waste sludge |
| CN101279838B (en) * | 2008-04-25 | 2010-06-09 | 陕西科技大学 | Method for preparing water-permeable brick with riverbed deposited sand and mud |
| CN101844906A (en) * | 2010-04-15 | 2010-09-29 | 同济大学 | Method for preparing sediment mud and sand into high-intensity building materials through improving activity by calcination |
| CN101844906B (en) * | 2010-04-15 | 2012-06-06 | 同济大学 | Method for preparing sediment mud and sand into high-intensity building materials through improving activity by calcination |
| CN102431081A (en) * | 2011-09-01 | 2012-05-02 | 同济大学 | Method for solidifying river sediment into building material under normal pressure |
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| CN106431138A (en) * | 2016-09-22 | 2017-02-22 | 李艳荣 | Light-weight foamed ceramic building board and preparation method thereof |
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