CN107344845B - Method for preparing building brick by using river and lake sludge and building garbage - Google Patents
Method for preparing building brick by using river and lake sludge and building garbage Download PDFInfo
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- CN107344845B CN107344845B CN201710575328.XA CN201710575328A CN107344845B CN 107344845 B CN107344845 B CN 107344845B CN 201710575328 A CN201710575328 A CN 201710575328A CN 107344845 B CN107344845 B CN 107344845B
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- sludge
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/34—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders
- C04B28/344—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders the phosphate binder being present in the starting composition solely as one or more phosphates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a method for preparing building bricks by using river and lake sludge and building garbage, which comprises the following steps: (1) collecting the construction waste to obtain construction waste powder; (2) collecting river and lake sludge to obtain river and lake sludge powder; (3) collecting the dangerous waste to obtain dangerous waste powder; (4) mixing 20-40% of construction waste powder, 20-40% of riverway and lake sludge powder and 30-50% of hazardous waste powder according to weight percentage to obtain building material powder; (5) mixing 4-6% of calcium phosphate hydrate or calcium silicate hydrate, 3-7% of calcium silicate colloid and 87-93% of building material powder according to the weight percentage, and then adding water for mixing to obtain building material mud; (6) and (3) carrying out a pressing process on the building mud to form the building mud with a blocky structure, and then carrying out a drying process to obtain the building brick. The invention not only avoids the pollution to the environment and meets the requirement of environmental protection, but also realizes the recycling of the resource which changes waste into valuable, and becomes a regenerated building brick.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a method for preparing building bricks by using river and lake sludge and building garbage.
Background
River and lake sludge is one of the important types of municipal solid waste. A large amount of sludge is generated in river dredging of water-carrying rivers, lakes and the like in China, wherein the rivers are densely distributed with water nets. At present, the river and lake dredging sludge in China is only treated by temporary piling, occupies land and causes secondary pollution to the surrounding environment.
With the acceleration of industrialization and urbanization, the construction industry is rapidly developing, and along with the increase of the generated construction waste, the quantity of Chinese construction waste accounts for more than 1/3 of the total quantity of municipal waste. The construction waste piled everywhere not only can cause potential safety hazard, but also can cause pollution to soil, water and air.
How to effectively and appropriately recycle the sludge in the river and the lake and the construction waste has important significance for avoiding secondary pollution, recycling resources and building a conservation-oriented society.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for preparing building bricks by using river channel and lake sludge and building garbage according to the defects of the prior art, so as to avoid the pollution of the river channel and lake sludge and the building garbage to the environment and realize the cyclic utilization of resources.
The technical scheme of the invention is as follows:
a method for preparing building bricks by using sludge in rivers and lakes and construction wastes comprises the following steps:
(1) collecting construction waste, and sequentially carrying out crushing, magnetic separation, crushing and drying on the construction waste to obtain construction waste powder;
(2) collecting river channel and lake sludge, and sequentially performing dewatering and drying processes on the river channel and lake sludge to obtain river channel and lake sludge powder;
(3) collecting dangerous waste, and grinding and drying the dangerous waste to obtain dangerous waste powder;
(4) mixing 20-40% of construction waste powder, 20-40% of riverway and lake sludge powder and 30-50% of hazardous waste powder according to weight percentage to obtain building material powder;
(5) mixing 4-6% of calcium phosphate hydrate or calcium silicate hydrate, 3-7% of calcium silicate colloid and 87-93% of building material powder according to the weight percentage, and then adding water for mixing to obtain building material mud;
(6) and (3) carrying out a pressing process on the building mud to form the building mud with a blocky structure, and then carrying out a drying process to obtain the building brick.
Further, in step (1): crushing and drying to obtain the construction waste powder with the grain diameter of 1-3mm and the dryness of 85-95%.
Further, in the step (2): carrying out filter pressing and dewatering on the sludge in the river and the lake by using a plate-and-frame filter press; obtaining the river and lake sludge powder with the particle size of 120-150 meshes and the dryness of 85-95% after the drying process.
Further, in step (3): according to the weight percentage, the dangerous waste consists of 60-80% of boiler fly ash and 20-40% of garbage incinerator fly ash.
Further, in step (3): the grinding and drying process can obtain the specific surface area of 250-350m2A dangerous waste powder with a dryness of 85-95% per kg.
Further, in the step (4): mixing 30% of construction waste powder, 30% of riverway and lake sludge powder and 40% of hazardous waste powder according to weight percentage to obtain the building material powder.
Further, in step (5): mixing 5% of calcium phosphate hydrate or calcium silicate hydrate, 5% of calcium silicate colloid and 90% of building material powder according to the weight percentage, and then adding water for mixing to obtain building material mud;
further, in step (6): the pressing process comprises pressing pressure of 300kg/cm in 1.5 s2Gradually increased to 400kg/cm2Then, the press pressure was maintained at 400kg/c for 3 secondsm2And obtaining the building material mud with a blocky structure.
Further, in step (6): the drying process comprises hot air drying at 40-50 deg.C for 7 days or natural drying at 15-25 deg.C for 7-28 days.
Compared with the prior art, the invention has the following beneficial effects:
(1) not only avoids the pollution to the environment and meets the requirement of environmental protection, but also realizes the recycling of the resource which changes waste into valuable, and becomes a regenerated building brick;
(2) the raw materials are wide, so that the production cost of the building material brick is low, and the benefit is greatly improved;
(3) the building material powder can be made into bricks only by adding 4-6% of calcium phosphate hydrate or calcium silicate hydrate and 3-7% of calcium silicate colloid, wherein the calcium phosphate hydrate or calcium silicate hydrate and calcium silicate colloid have the functions of coagulation and solidification; in the prior art, the cement with the function of coagulation and solidification can be formed into bricks only when the dosage of the cement reaches 30-35 percent; compared with cement, the calcium phosphate hydrate or calcium silicate hydrate gel of the invention has less usage amount, thereby saving cost;
(4) the calcium phosphate hydrate or calcium silicate hydrate and calcium silicate colloid are acidic substances, can replace alkaline cement, and is more environment-friendly;
(5) the hydrated calcium phosphate or hydrated calcium silicate and calcium silicate colloid has low cost, thereby further saving the cost;
(6) the drying time is short, and the production efficiency is improved;
(7) the peak value of the compressive strength of the formed building material brick reaches 50-60MPa, and the compressive capacity is excellent.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below.
The invention provides a first embodiment, a method for preparing building bricks by using sludge in rivers and lakes and construction wastes, which comprises the following steps:
(1) collecting the construction waste, and sequentially carrying out crushing, magnetic separation, crushing and drying processes on the construction waste to obtain construction waste powder. Wherein the construction waste is composed of one or more of slag, concrete blocks, broken stone blocks, brick and tile broken blocks, waste mortar, slurry and asphalt blocks; and crushing and drying to obtain the construction waste powder with the particle size of 1-3mm and the dryness of 90%.
(2) Collecting river channel and lake sludge, and sequentially dehydrating and drying the river channel and lake sludge to obtain river channel and lake sludge powder. The dehydration step in this embodiment is: putting the river and lake sludge into a sedimentation tank for standing and sedimentation, collecting the river and lake sludge on the bottom layer of the sedimentation tank, and then performing filter pressing and dehydration on the river and lake sludge by using a plate-and-frame filter press; obtaining the river and lake sludge powder with the particle size of 120-150 meshes and the dryness of 90 percent after the drying process.
(3) Collecting the dangerous waste, and grinding and drying the dangerous waste to obtain dangerous waste powder. Wherein the hazardous waste consists of 70% of boiler fly ash and 30% of garbage incinerator fly ash; the grinding and drying process gave a specific surface area of 300m2A hazardous waste powder of 90% dryness/kg.
(4) According to the weight percentage, 20-40% of construction waste powder, 20-40% of riverway and lake sludge powder and 30-50% of hazardous waste powder are mixed to obtain the building material powder.
(5) Mixing 4-6% of calcium phosphate hydrate or calcium silicate hydrate, 3-7% of calcium silicate colloid and 87-93% of building material powder according to the weight percentage, and then adding water to mix to obtain the building material mud.
(6) And (3) carrying out a pressing process on the building mud to form the building mud with a blocky structure, and then carrying out a drying process to obtain the building brick. Wherein the pressing process comprises pressing pressure within 1.5 s from 300kg/cm2Gradually increased to 400kg/cm2Then, the press pressure was maintained at 400kg/cm for 3 seconds2And obtaining the building material mud with a blocky structure. The drying process comprises hot air drying at 40-50 deg.C for 7 days or natural drying at 15-25 deg.C for 7-28 days.
The second embodiment of the present invention is different from the first embodiment in that: (4) mixing 30% of construction waste powder, 30% of riverway and lake sludge powder and 40% of hazardous waste powder according to weight percentage to obtain building material powder; (5) mixing 5% of calcium phosphate hydrate or calcium silicate hydrate, 5% of calcium silicate colloid and 90% of building material powder according to the weight percentage, and then adding water to mix to obtain the building material mud.
The third embodiment of the present invention is different from the first embodiment in that: (4) mixing 25% of construction waste powder, 25% of riverway and lake sludge powder and 50% of hazardous waste powder according to weight percentage to obtain building material powder; (5) mixing 4% of calcium phosphate hydrate or calcium silicate hydrate, 3% of calcium silicate colloid and 93% of building material powder according to the weight percentage, and then adding water to mix to obtain the building material mud.
The fourth embodiment of the present invention is different from the first embodiment in that: (4) mixing 40% of construction waste powder, 40% of riverway and lake sludge powder and 30% of hazardous waste powder according to weight percentage to obtain building material powder; (5) mixing 6% of calcium phosphate hydrate or calcium silicate hydrate, 7% of calcium silicate colloid and 87% of building material powder according to the weight percentage, and then adding water to mix to obtain the building material mud.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (3)
1. A method for preparing building bricks by using river and lake sludge and building garbage is characterized by comprising the following steps:
(1) collecting construction waste, and sequentially carrying out crushing, magnetic separation, crushing and drying on the construction waste to obtain construction waste powder; crushing and drying to obtain construction waste powder with the particle size of 1-3mm and the dryness of 85-95%;
(2) collecting river channel and lake sludge, and sequentially performing dewatering and drying processes on the river channel and lake sludge to obtain river channel and lake sludge powder; carrying out filter pressing and dewatering on the sludge in the river and the lake by using a plate-and-frame filter press; obtaining river and lake sludge powder with the particle size of 120-150 meshes and the dryness of 85-95% after the drying process;
(3) collecting dangerous waste, and grinding and drying the dangerous waste to obtain dangerous waste powder; according to the weight percentage, the dangerous waste consists of 60-80% of boiler fly ash and 20-40% of garbage incinerator fly ash;
(4) mixing 30% of construction waste powder, 30% of riverway and lake sludge powder and 40% of hazardous waste powder according to weight percentage to obtain building material powder;
(5) mixing 5% of hydrated calcium phosphate, 5% of calcium silicate colloid and 90% of building material powder according to weight percentage, and then adding water for mixing to obtain building material mud;
(6) pressing the building material mud into building material mud with a blocky structure, and drying to obtain a building material brick; the pressing process comprises pressing pressure of 300kg/cm in 1.5 s2Gradually increased to 400kg/cm2Then, the press pressure was maintained at 400kg/cm for 3 seconds2And obtaining the building material mud with a blocky structure.
2. The method for preparing building bricks by using sludge in rivers and lakes and construction wastes as claimed in claim 1, wherein in the step (3): the grinding and drying process can obtain the specific surface area of 250-350m2A dangerous waste powder with a dryness of 85-95% per kg.
3. The method for preparing building bricks by using sludge in rivers and lakes and construction wastes as claimed in claim 1, wherein in the step (6): the drying process comprises hot air drying at 40-50 deg.C for 7 days or natural drying at 15-25 deg.C for 7-28 days.
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| CN201710575328.XA CN107344845B (en) | 2017-07-14 | 2017-07-14 | Method for preparing building brick by using river and lake sludge and building garbage |
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| CN201710575328.XA CN107344845B (en) | 2017-07-14 | 2017-07-14 | Method for preparing building brick by using river and lake sludge and building garbage |
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| CN107344845A CN107344845A (en) | 2017-11-14 |
| CN107344845B true CN107344845B (en) | 2020-09-01 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106277993A (en) * | 2016-08-19 | 2017-01-04 | 岳佐星 | A kind of preparation method of environment-friendly baking-free bricks |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106277993A (en) * | 2016-08-19 | 2017-01-04 | 岳佐星 | A kind of preparation method of environment-friendly baking-free bricks |
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Effective date of registration: 20200619 Address after: 427200 group 2, Yangshi village, Yanghe Township, Cili, Zhangjiajie, Hunan Applicant after: Wang Liangrong Address before: 523000, Houjie Town, Houjie Town, Houjie Town, Guangdong, Dongguan Applicant before: GUANGDONG SUCHUN ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
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