CN112430040A - Road concrete prepared from tap water plant sludge powder and coral fine aggregate - Google Patents
Road concrete prepared from tap water plant sludge powder and coral fine aggregate Download PDFInfo
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- CN112430040A CN112430040A CN202011421270.1A CN202011421270A CN112430040A CN 112430040 A CN112430040 A CN 112430040A CN 202011421270 A CN202011421270 A CN 202011421270A CN 112430040 A CN112430040 A CN 112430040A
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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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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Abstract
The invention discloses road concrete prepared from tap water plant sludge powder and coral fine aggregate, which comprises, by weight, 430 parts of cement 370 and 430 parts of tap water plant sludge powder, 36-43 parts of river sand 590, 36-46 parts of coral fine aggregate, 1170 parts of crushed stone 1120 and 80 parts of quicklime powder, 1-4 parts of gypsum powder, 183 parts of water 166 and 183 parts of water reducing agent, and the water-cement ratio is 0.35-0.45. The invention takes the sewage sludge powder of the waterworks as the mineral admixture to replace part of cement, and simultaneously adds the quicklime powder and the gypsum powder for further exciting and improving the activity of the sewage sludge powder of the waterworks; the coral fine aggregate is used to replace partial river sand, so as to further improve the aggregate grain composition, regulate the micro-pump effect of coral aggregate, regulate the local water-cement ratio of aggregate surface and improve the road concrete performance. The road concrete is prepared from the perspective of the optimized design of the cementing material and the aggregate, the performance of the concrete is improved, the high-added-value green application of the cement powder and the coral fine aggregate in waterworks is facilitated, and the comprehensive benefit is high.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to highway concrete prepared from tap water plant sludge powder and coral fine aggregate.
Background
Since the advent of concrete, the development of national infrastructure, particularly highway construction, has been accelerated to a great extent. The concrete design strength for the highway generally adopts 28-day bending tensile strength of cement concrete, and compared with the common concrete adopting 28-day cubic compressive strength as the design strength, the concrete has higher strength requirement indexes, the design bending tensile strength with the traffic load grade of light grade is 4.0MPa, the design bending tensile strength with the traffic load grade of medium grade is 4.5MPa, and the design bending tensile strength with the traffic load grade of heavy, extra-heavy and extra-heavy grades is more than 5.0 MPa. With the increasing scale of the infrastructure in China, the traditional raw materials such as cement and natural aggregate can not meet the construction requirements, so that a new green material needs to be searched for to replace part of the traditional raw materials, and the concrete meeting the design requirements of the concrete for roads and reducing the consumption of natural resources is designed urgently.
With the increasing urban population, the increase of water supply plants is increasing. The sludge of the tap water plant is different from solid wastes such as pipeline sludge, sewage sludge, sludge and the like, is a secondary product in the tap water treatment process, and contains a large amount of organic matters, rich nutrients such as nitrogen, phosphorus and the like, heavy metals, germs and the like. The secondary pollution of the land is caused by the fact that a large amount of sludge which is not subjected to harmless treatment is discarded and randomly piled in cities. Therefore, there is an urgent need to find a safe, economical and efficient method for treating sludge in large quantities. The coral fine aggregate belongs to a natural light aggregate material, the main component of the coral fine aggregate is calcium carbonate, the surface is concave-convex and porous, the coral fine aggregate has the characteristics of large porosity, large water absorption and the like, the coral fine aggregate is rich in reserve volume and can be used for preparing concrete, the rough surface of the coral fine aggregate can increase the mechanical friction force between aggregates and can tightly adsorb cement paste, the coral fine aggregate has the characteristics of porosity and strong water absorption, a part of water can be absorbed at the initial stage of concrete stirring, the actual effective water-cement ratio is reduced, and the water absorbed at the early stage is gradually released at the later stage of maintenance, so that the continuous hydration. The 'micro-pump' effect of water absorption and water release adjusts the local water-cement ratio on the surface of the fine aggregate, improves the interface transition area between the coral fine aggregate and cement paste, and improves the concrete strength.
In conclusion, if sludge and coral fine aggregate can be used in the concrete industry, especially in highway construction, not only is the harmless treatment of sludge facilitated, but also the consumption of resources such as cement and natural river sand can be reduced.
In order to solve the problems, the scheme is developed accordingly.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the highway concrete prepared from the tap water plant sludge powder and the coral fine aggregate, and solves the problems in the background technology.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a highway concrete prepared from tap water plant sludge powder and coral fine aggregate comprises the following components in parts by weight,
430 parts of cement 370-containing material, 36-43 parts of cement powder from a water plant, 590 parts of river sand 570-containing material, 36-46 parts of coral fine aggregate, 1170 parts of crushed stone 1120-containing material, 4-16 parts of quicklime powder, 1-4 parts of gypsum powder, 183 parts of water 166-containing material and 5-9 parts of water reducing agent.
The method comprises the following steps of (1) taking the sewage sludge powder of the water works as a mineral admixture to replace part of conventional cement, adding quicklime powder and gypsum powder to further improve the activity of the sewage sludge powder of the water works, and carrying out steam curing on the sewage sludge powder of the water works at the beginning; and secondly, replacing partial river sand with coral fine aggregates, further improving the particle composition of the aggregates, regulating the local water-to-gel ratio of the surfaces of the aggregates by using the micropump effect of the coral aggregates, and performing steam curing on the coral fine aggregates to volatilize harmful substances of the coral fine aggregates, ensure that the water absorption rate reaches a corresponding range and improve the performance of the highway concrete. The road concrete is prepared from the perspective of the optimized design of the cementing material and the aggregate, the performance of the concrete is improved, the high-added-value green application of the cement powder and the coral fine aggregate in waterworks is facilitated, and the comprehensive benefit is high.
Better performance can be obtained under the conditions of the following preferred embodiments:
preferably, the cement is P.O 52.5 cement.
Preferably, the fineness modulus of the river sand is 2.4-3.0, the grain composition is a zone II, and the mud content is less than 0.4%.
Preferably, the water reducing agent is a sulfamic acid water reducing agent, and the solid content in the water reducing agent is not less than 25%.
Preferably, the crushed stone has a continuous gradation of 5-25mm in particle size, the needle-like content of the needle-like gradation is less than 5% of the total mass of the crushed stone, and the mud content is less than 0.5%.
The preparation method of the tap water plant sludge powder applied to the highway concrete prepared from the tap water plant sludge powder and the coral fine aggregate comprises the following steps:
sludge in a sedimentation tank of a water works is selected to be subjected to factory centralized centrifugal dehydration to obtain a sludge particle raw sample, and the sludge particle raw sample is prepared into the water works sludge powder through multiple processes of steam curing, drying treatment, classified calcination and mechanical grinding:
specifically, (1) the original sludge particles of the waterworks are maintained for 3 hours, the temperature is uniformly increased for 2 hours, the constant temperature is 6 hours, and the constant temperature is 70 +/-5 ℃; (2) cooling for 1h, drying and screening out sludge particles with the particle size larger than 5 mm; (3) calcining the sludge particles with the particle size of less than 3mm at the temperature of 600-800 ℃ for 1-2 hours, and calcining the sludge particles with the particle size of 3-5mm at the temperature of 800-1000 ℃ for 2-3 hours; (4) after natural cooling, the mass ratio of the mixture is 1: 1, mixing and grinding to obtain the sludge powder of the waterworks.
Preferably, the specific surface area of the tap water plant sludge powder is more than or equal to 650m2The activity index of/kg, 28d is more than or equal to 90 percent, and SiO is in the main chemical composition2+A12O3The total amount is over 75%.
SiO in sludge2+A12O3The content of (a) is higher, so that the sludge has higher volcanic ash activity. The sludge is subjected to a classification calcination system according to the particle size, so that on one hand, the energy consumption is saved, and on the other hand, the sludge is subjected to high-temperature calcination to obtain the activated SiO2And Activity A12O3)。
The preparation method of the coral aggregate of the concrete for the road, which is applied to the preparation of the cement powder and the coral fine aggregate in the waterworks, comprises the following steps:
selecting medium sand coral fine aggregate with particle size composition of II area for steam curing, standing for 4h, uniformly heating at 20 deg.C/h, standing at 80 + -5 deg.C for 4h, and cooling to room temperature.
Preferably, the coral fine aggregate is medium sand, the grain composition is a zone II, the water absorption rate is 3% -10%, the void ratio is 20% -28%, and the chloride ion content is 0.02% -0.2%.
Preferably, the quicklime powder has CaO as a main component, and CaO is a common sludge modifier, which destroys extracellular polymer substances and hydrolyzes cell walls and tissues mainly composed of proteins and carbohydrates. Sludge denaturation facilitates the release of bound water and cellular water and improves the slurrification of sludge. Therefore, the sludge is modified by adding the quicklime powder, the sludge treatment capacity is effectively improved, and the method is cheap and practical.
Preferably, the gypsum powder is first-grade or super-grade dihydrate gypsum powder, and the specific surface area of the gypsum powder is more than or equal to 420m2/kg。
The gypsum powder is a common excitant, can promote the generation of AFt to a certain extent, and improves the early strength of the concrete material. In addition, the gypsum powder can also promote the hydration of tricalcium silicate in the cement to form hydrated calcium silicate gel with more stable structure. As the gypsum powder is a cheap and practical material which can effectively excite the activity of the sludge powder of the water works, the addition of a proper amount of gypsum powder as an exciting agent can greatly enhance the pozzolanic activity of the sludge powder of the water works, and further increase the dosage of the sludge admixture for replacing cement, thereby greatly reducing the dosage of the cement and improving the utilization rate of the sludge.
(III) advantageous effects
After adopting the technical scheme, compared with the prior art, the invention has the following advantages:
1. the cement is replaced by the sewage powder from the waterworks, and the quicklime powder and the gypsum powder are added as the excitant, so that the consumption of the cement in the concrete raw material for the highway is greatly reduced. The sludge in a sedimentation tank of a water works is subjected to factory centralized dehydration, drying and classified calcination, and the sludge is prepared from the following raw materials in a mass ratio of 1: 1 the sludge powder of the tap water plant obtained after mixing has certain activity. SiO in sewage powder of waterworks2And A12O3The cement-gypsum composite cementitious material mainly exists in a glass body inert state, gypsum powder is added to serve as an exciting agent to chemically excite the tap water plant sludge powder, and meanwhile, quicklime powder is added to modify sludge, so that the pozzolanic activity of the tap water plant sludge powder can be improved to a great extent, the activity of the tap water plant sludge powder during later mechanical grinding is greatly excited through steam curing, the hydration speed of the cement-tap water plant sludge powder composite cementitious material is increased, the early strength of the concrete for the highway is greatly improved, and the prepared concrete can meet the requirement of the concrete for the highway on the strength.
2. The coral fine aggregates have abundant reserves, and the coral fine aggregates can be used for replacing natural river sand in a proper amount to improve the grain composition of the aggregates, the rough surfaces of the coral fine aggregates can enhance the mechanical friction force between the aggregates and adsorb cement paste, the 'micro-pump' effect can adjust the local water-cement ratio of the surfaces of the fine aggregates, the interface transition area between the coral fine aggregates and the cement paste is improved, the coral fine aggregates are subjected to steam curing, harmful substances of the coral fine aggregates are volatilized, meanwhile, the water absorption rate is ensured to reach the corresponding range, and the strength of the concrete is improved; therefore, the highway concrete provided by the invention has the advantages that from the perspective of aggregate optimization design, river sand is partially replaced by the coral fine aggregate, so that the performance of the highway concrete is improved, the high-added-value green application of the coral fine aggregate is facilitated, the use of natural river sand is reduced, and the comprehensive benefit is high.
3. The cement powder of the waterworks is used as the mineral admixture to replace part of cement in the concrete raw material, so that the problem of treatment of excessive waste sludge of the waterworks is solved, the harmless treatment of the sludge is facilitated, the consumption of resources such as cement is reduced, the harmless high-added-value utilization of the sludge in the highway concrete is realized, the resource recycling and reusing approach of the sludge is expanded, and compared with the highway concrete technology with the same effect, the cement powder of the waterworks has better environmental protection effect and conforms to the green sustainable development strategy advocated by the state. The coral fine aggregate has rough surface, increases the mechanical engaging force of the aggregate and improves the grain composition; meanwhile, the surface of the material is rough and can absorb slurry; the coral fine aggregate can also play a 'micro-pump' effect, adjust the effective water-cement ratio and improve the concrete strength. The coral fine aggregate is used for partially replacing natural river sand in the concrete raw material, so that the use of a large amount of natural river sand can be reduced, the high added value utilization of the coral fine aggregate is realized, and the sustainable development of concrete is ensured.
Detailed Description
The present invention is further illustrated by the following specific examples.
The invention provides a road concrete prepared from tap water plant sludge powder and coral fine aggregate, which comprises the following components in percentage by weight: according to the weight portion, the cement mortar consists of 430 portions of 370-plus cement, 36-43 portions of cement powder from water works, 590 portions of river sand 570-plus, 36-46 portions of coral fine aggregate, 1170 portions of 1120-plus gravel, 4-16 portions of quicklime powder, 1-4 portions of gypsum powder, 183 portions of 166-plus water and 5-9 portions of water reducing agent, and the water-cement ratio is 0.35-0.45.
The method comprises the following steps of (1) taking the sewage sludge powder of the water works as a mineral admixture to replace part of conventional cement, adding quicklime powder and gypsum powder to further improve the activity of the sewage sludge powder of the water works, and carrying out steam curing on the sewage sludge powder of the water works at the beginning; secondly, coral fine aggregates replace part of river sand to further improve the particle composition of the aggregates,and steam curing the coral fine aggregate. The specific surface area of the tap water plant sludge powder is more than or equal to 650m2The activity index of/kg, 28d is more than or equal to 90 percent. The sand coral fine aggregate is selected from a II area with grain composition, the water absorption rate is 3-10%, the void ratio is 20-28%, and the chloride ion content is 0.02-0.2%.
Based on the above formulation, the amounts of the different components were adjusted to obtain examples 1 to 4 and the amounts of the conventional components to obtain comparative examples 1 to 3, and the 28d flexural tensile strengths of the different road concretes were measured respectively.
The concrete bending and tensile strength test method for the highway is carried out according to JTG E30-2005 test Specification for highway engineering cement and cement concrete.
Example 1:
the highway concrete prepared by adopting the waterworks sludge powder and the coral fine aggregate comprises the following components in parts by weight,
370 parts of P.O 52.5 cement, 36 parts of tap water plant sludge powder, 590 parts of river sand, 38 parts of coral fine aggregate, 1170 parts of broken stone, 4 parts of quicklime powder, 1 part of gypsum powder, 183 parts of water, 5 parts of a water reducing agent, and the water-cement ratio is 0.45.
The technical indexes of the concrete for the highway prepared by adopting the sludge powder of the waterworks in the embodiment are as follows: the 28d bending tensile strength is 4.3 MPa.
Example 2:
the highway concrete prepared by adopting the waterworks sludge powder and the coral fine aggregate comprises the following components in parts by weight,
390 parts of P.O 52.5 cement, 38 parts of tap water plant sludge powder, 585 parts of river sand, 37 parts of coral fine aggregate, 1150 parts of broken stone, 8 parts of quicklime powder, 2 parts of gypsum powder, 180 parts of water, 6 parts of a water reducing agent, and the water-cement ratio is 0.42.
The technical indexes of the concrete for the highway prepared by adopting the sludge powder of the waterworks in the embodiment are as follows: the 28d bending tensile strength is 4.6 MPa.
Example 3:
the highway concrete prepared by adopting the waterworks sludge powder and the coral fine aggregate comprises the following components in parts by weight,
410 parts of P.O 52.5 cement, 41 parts of tap water plant sludge powder, 570 parts of river sand, 46 parts of coral fine aggregate, 1135 parts of broken stone, 12 parts of quicklime powder, 3 parts of gypsum powder, 176 parts of water, 7 parts of a water reducing agent and 0.39 of water-cement ratio.
The technical indexes of the concrete for the highway prepared by adopting the sludge powder of the waterworks in the embodiment are as follows: the 28d bending tensile strength is 4.9 MPa.
Example 4:
the highway concrete prepared by adopting the waterworks sludge powder and the coral fine aggregate comprises the following components in parts by weight,
430 parts of P.O 52.5 cement, 43 parts of waterworks sludge powder, 575 parts of river sand, 36 parts of coral fine aggregate, 1120 parts of broken stone, 16 parts of quicklime powder, 4 parts of gypsum powder, 166 parts of water, 9 parts of a water reducing agent, and the water-cement ratio is 0.35.
The technical indexes of the concrete for the highway prepared by adopting the sludge powder of the waterworks in the embodiment are as follows: the 28d bending tensile strength is 5.4 MPa.
Comparative example 1:
the highway concrete prepared by adopting the cement and the river sand comprises the following components by weight,
406 parts of P.O 52.5 cement, 628 parts of river sand, 1170 parts of broken stone, 4 parts of quicklime powder, 1 part of gypsum powder, 183 parts of water and 5 parts of a water reducing agent, wherein the water-cement ratio is 0.45.
The technical indexes of the highway concrete prepared by adopting the cement and the river sand in the comparative example are as follows: the 28d bending tensile strength is 3.8 MPa.
Comparative example 2:
the highway concrete prepared from the sewage sludge powder and river sand comprises the following components in parts by weight,
370 parts of P.O 52.5 cement, 36 parts of tap water plant sludge powder, 628 parts of river sand, 1170 parts of broken stone, 4 parts of quicklime powder, 1 part of gypsum powder, 183 parts of water, 5 parts of a water reducing agent and 0.45 of water-cement ratio.
The technical indexes of the highway concrete prepared by the tap water plant sludge powder and the river sand in the comparative example are as follows: the 28d bending tensile strength is 4.2 MPa.
Comparative example 3:
the highway concrete prepared by adopting cement and coral fine aggregates comprises the following components by weight,
406 parts of P.O 52.5 cement, 590 parts of river sand, 38 parts of coral fine aggregate, 1170 parts of broken stone, 4 parts of quicklime powder, 1 part of gypsum powder, 183 parts of water and 5 parts of a water reducing agent, wherein the water-cement ratio is 0.45.
The technical indexes of the road concrete prepared by adopting the cement and the coral fine aggregate in the comparative example are as follows: the 28d bending tensile strength is 4.0 MPa.
Table one: EXAMPLES 1-4 summary of weight Components and test specifications
Table two: comparative examples 1-3 summary of the weight Components and technical indices of the tests
According to the detection result, the tap water plant sludge powder and the coral fine aggregate can improve the 28d bending and pulling strength of the highway concrete, and the two are not enough. Simultaneously, this scheme adopts water works mud powder to replace some river sand with the coral fine aggregate, both adaptations are used, through a series of preparation technologies such as steam curing, have better effect to promoting concrete 28d flexural tensile strength.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and the protection scope must be determined by the scope of the claims.
Claims (8)
1. The utility model provides a concrete for highway that tap water factory sludge powder and coral fine aggregate prepared which characterized in that: comprises the following components, by weight, 370 parts of cement, 36-43 parts of cement powder from a water plant, 590 parts of river sand, 36-46 parts of coral fine aggregate, 1170 parts of crushed stone 1120, 4-16 parts of quicklime powder, 1-4 parts of gypsum powder, 183 parts of water 166 and 183 parts of water reducing agent, and the water-cement ratio is 0.35-0.45.
2. The road concrete prepared from tap water plant sludge powder and coral fine aggregate according to claim 1, wherein: the cement is P.O 52.5 cement; the fineness modulus of the river sand is 2.4-3.0, the particle composition is a zone II, and the mud content is less than 0.4%; continuous gradation of the crushed stone with the grain diameter of 5-25mm, wherein the needle flake content is less than 5 percent of the total mass of the crushed stone, and the mud content is less than 0.5 percent; the water reducing agent is a sulfamic acid water reducing agent, and the solid content in the water reducing agent is not less than 25%.
3. The road concrete prepared from tap water plant sludge powder and coral fine aggregate according to claim 1, wherein: the specific surface area of the tap water plant sludge powder is more than or equal to 650m2The activity index of/kg, 28d is more than or equal to 90 percent, and SiO is in the main chemical composition2+A12O3The total amount is over 75%.
4. A preparation method of tap water plant sludge powder applied to highway concrete prepared from tap water plant sludge powder and coral fine aggregates is characterized by comprising the following steps: selecting sludge in a sedimentation tank of a water works, carrying out factory centralized centrifugal dehydration on the sludge to obtain a sludge particle raw sample, preparing sludge powder of the water works through steam curing, drying treatment, graded calcination and mechanical grinding processes,
specifically, the method comprises the following steps of (1) keeping the sludge particles of the waterworks for 3 hours, uniformly heating for 2 hours, keeping the temperature for 6 hours, and keeping the constant temperature at 70 +/-5 ℃; (2) cooling for 1h, drying and screening out sludge particles with the particle size larger than 5 mm; (3) calcining the sludge particles with the particle size of less than 3mm at the temperature of 600-800 ℃ for 1-2 hours, and calcining the sludge particles with the particle size of 3-5mm at the temperature of 800-1000 ℃ for 2-3 hours; (4) and (3) naturally cooling according to the mass ratio of 1: 1, mixing and grinding to obtain the sludge powder of the waterworks.
5. The road concrete prepared from tap water plant sludge powder and coral fine aggregate according to claim 1, wherein: the coral fine aggregate is medium sand, the grain composition is in a zone II, the water absorption rate is 3% -10%, the void ratio is 20% -28%, and the chloride ion content is 0.02% -0.2%.
6. A preparation method of coral aggregates of highway concrete applied to preparation of cement powder and coral fine aggregates in waterworks is characterized in that: selecting medium sand coral fine aggregate with particle size composition of II area for steam curing, specifically standing for 4h in sequence at constant temperature of 20 ℃/h, standing at 80 + -5 ℃ for 4h, and finally uniformly cooling to room temperature.
7. The road concrete prepared from tap water plant sludge powder and coral fine aggregate according to claim 1, wherein: the quicklime powder is CL90-QP quicklime, and the specific surface area of the quicklime powder is not less than 400m2/kg。
8. The road concrete prepared from tap water plant sludge powder and coral fine aggregate according to claim 1, wherein: the gypsum powder is first-grade or special-grade dihydrate gypsum powder, and the specific surface area of the gypsum powder is more than or equal to 420m2/kg。
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| CN202011421270.1A CN112430040A (en) | 2020-12-08 | 2020-12-08 | Road concrete prepared from tap water plant sludge powder and coral fine aggregate |
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| CN202011421270.1A CN112430040A (en) | 2020-12-08 | 2020-12-08 | Road concrete prepared from tap water plant sludge powder and coral fine aggregate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113336495A (en) * | 2021-05-24 | 2021-09-03 | 绍兴文理学院 | Green low-creep concrete |
| CN113754387A (en) * | 2021-10-27 | 2021-12-07 | 开平达宇管桩混凝土有限公司 | Corrosion-resistant anti-seepage concrete material and preparation method thereof |
-
2020
- 2020-12-08 CN CN202011421270.1A patent/CN112430040A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113336495A (en) * | 2021-05-24 | 2021-09-03 | 绍兴文理学院 | Green low-creep concrete |
| CN113754387A (en) * | 2021-10-27 | 2021-12-07 | 开平达宇管桩混凝土有限公司 | Corrosion-resistant anti-seepage concrete material and preparation method thereof |
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