CN110950610A - Sponge body pervious concrete and preparation method and application thereof - Google Patents
Sponge body pervious concrete and preparation method and application thereof Download PDFInfo
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- CN110950610A CN110950610A CN201911327538.2A CN201911327538A CN110950610A CN 110950610 A CN110950610 A CN 110950610A CN 201911327538 A CN201911327538 A CN 201911327538A CN 110950610 A CN110950610 A CN 110950610A
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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
- 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
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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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
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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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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a spongy body pervious concrete and a preparation method and application thereof. In addition, the invention has simple manufacturing process and wide material source, is suitable for large-scale production, can be cast in situ and prefabricated in factories, and has great market application and popularization values.
Description
Technical Field
The invention belongs to the technical field of concrete, and particularly relates to sponge body pervious concrete and a preparation method and application thereof.
Background
With the annual increase of urbanization rate in China, large-scale urban expansion caused by the urban expansion leads to excessive development of hydrological resources, rapid increase of dense mat surface proportion, increase of flood peak runoff coefficient, and severe urban flood disasters, thus causing loss. Meanwhile, with the increase of traffic volume, the runoff pollution of road pavement has become a non-negligible problem. Traditional closely knit type road because its closely waterproof characteristics, when falling rain and taking place, the rainwater collects in the short time, causes the rapid increase of short-term runoff, forms great instantaneous velocity of flow, and this has also strengthened the scouring effect for a large amount of pollutants that pile up on the road surface in fine day are carried by the runoff and are discharged into the water. The above process will increase the burden on the drainage system on the one hand and will also have a significant adverse effect on the quality of the received water.
In 2014, the sponge city construction technical guide is externally published by the urban and rural construction department of housing, which means that the construction of urban drainage and waterlogging prevention systems in China will not mainly 'heavy pipe repair', rainwater is changed from burden to thirst-quenching wealth, and the construction concept is completely changed. The construction of the sponge city with natural accumulation, natural infiltration and natural purification functions is an important content of ecological civilization construction, is an important embodiment for realizing urbanization and environmental resource coordinated development, and is also an important task of city construction in China in future.
As the name suggests, the sponge city refers to a city which has good elasticity in the aspects of adapting to environmental changes, coping with free disasters and the like a sponge, absorbs water, stores water, seeps water and purifies water in the rainy period, and releases the stored water to be utilized when needed. Sponge city construction should follow ecological priority principle etc. combines together natural way and artificial measures, under the prerequisite of guaranteeing urban drainage waterlogging prevention safety, furthest realizes that rainwater accumulates in urban area, infiltration and purification, promotes the utilization of rainwater resource and ecological environment protection. In the sponge city construction process, the systematicness of natural rainfall, surface water and underground water is planned, water recycling links such as water supply and drainage are coordinated, and the complexity and the long-term property are considered.
The construction of sponge cities requires the existence of sponge bodies. The city 'sponge' includes water systems such as rivers, lakes and ponds, and city supporting facilities such as greenbelts, gardens and permeable pavements. Rainwater seeps, is stored in a storage way, is purified and recycled through the sponges, and finally the residual runoff is discharged outside through a pipe network and a pump station, so that the standard of an urban drainage system can be effectively improved, and the pressure of urban inland inundation is relieved.
The existing pervious concrete basically meets the requirement of a sponge body, makes up the impermeability of common concrete, and is ecological environment-friendly concrete. It is different from common concrete in that it has certain compression strength and certain water and air permeability. However, due to the reasons of low strength of the material, large pores of the pervious concrete and the like, the existing pervious concrete pavement has the defects of insufficient decontamination capability and low strength.
Therefore, how to provide a sponge body pervious concrete with strong dirt removing capability and high mechanical strength is a problem that needs to be solved urgently by technical personnel in the field.
Disclosure of Invention
In view of this, the technical problem to be solved by the present invention is to overcome the defects of the prior art, and provide a sponge body pervious concrete, a preparation method and an application thereof.
In order to achieve the above purpose, the invention provides the following technical scheme:
the sponge body water-permeable concrete is characterized by being prepared from the following raw materials in parts by weight: 75-85 parts of aggregate, 10-20 parts of cement, 5-10 parts of water, 0.3-0.8 part of adhesive, 0.2-0.6 part of additive and 1.0-2.0 parts of inorganic pigment.
Preferably, the sponge body pervious concrete is prepared from the following raw materials in proportion: 75-80 parts of aggregate, 10-15 parts of cement, 5-8 parts of water, 0.5-0.8 part of adhesive, 0.2-0.5 part of additive and 1.0-1.5 parts of inorganic pigment.
By adopting the technical scheme, the invention has the following beneficial effects:
according to the sponge body pervious concrete provided by the invention, the types and the using amounts of an adhesive and an additive (water reducing agent) suitable for the sponge body pervious concrete are preferably selected through reasonable proportion, and the sponge body pervious concrete has excellent dirt removing capacity, compressive strength and water permeability coefficient, can meet various engineering requirements for water permeability of concrete, and is beneficial to maintaining ecological balance and realizing sustainable development.
Preferably, the aggregate is crushed stone or pebble with the thickness of 5-10 mm, the crushing value of the aggregate is less than or equal to 15 percent, the needle-shaped content is less than or equal to 15 percent, the mud content is less than or equal to 1 percent, and the apparent density is more than or equal to 2500kg/m3The bulk density is more than or equal to 1350kg/m3The porosity is less than or equal to 47 percent.
Preferably, 10-20% of the aggregate is replaced by ceramsite.
The water quality purification method has the advantages that the ceramsite is doped, the surface of the ceramsite is provided with the micropores, the internal nets are crisscrossed, the specific surface area is large, the removal capacity of the pervious concrete to a large number of pollutants in the runoff rainwater is enhanced by utilizing the porous structure of the ceramsite, and the runoff rainwater quality purification capacity of the pervious concrete is enhanced.
Preferably, the cement is white portland cement or colored cement with the strength grade higher than 42.5.
The invention selects high-strength cement to improve the mechanical strength of the pervious concrete and increase the compressive strength so as to meet the engineering requirements of the concrete.
Preferably, the adhesive is a polymer composed of powdered monomers, and the adhesive is one of styrene-butadiene latex (SB latex), styrene-acrylic latex (AS latex) or ABS latex.
The invention effectively bonds cement and aggregate together by doping the special intensifier (adhesive) for pervious concrete during preparation, and forms a gap on the premise of reaching the designed strength, thereby ensuring rapid water penetration and meeting the strength requirement of pervious concrete.
Preferably, the additive is a water reducing agent, the additive is a polycarboxylic acid high-efficiency water reducing agent, and the water reducing rate is more than or equal to 8%.
The invention also aims to provide a preparation method of the sponge body pervious concrete.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a preparation method of sponge body pervious concrete specifically comprises the following steps:
(1) respectively weighing the following raw materials in formula ratio: 75-85 parts of aggregate, 10-20 parts of cement, 5-10 parts of water, 0.3-0.8 part of adhesive, 0.2-0.6 part of additive and 1.0-2.0 parts of inorganic pigment;
(2) fully and uniformly mixing the admixture weighed in the step (1) and water to obtain a mixed solution;
(3) and (3) putting the adhesive and the aggregate weighed in the step (1) into a stirrer to be stirred for 25-35 s, then adding the mixed liquid obtained in the step (2) to be uniformly stirred, finally adding the cement and the inorganic pigment weighed in the step (1), and continuously stirring to obtain the sponge body pervious concrete.
It should be noted that, in order to ensure the strength, water cannot be added at one time, the water can be added for 2-3 times, and the stirring time is not too short or too long easily.
By adopting the technical scheme, the invention has the following beneficial effects:
the invention has simple manufacturing process and wide material source, is suitable for large-scale production, and can be cast in situ and prefabricated in factories.
Preferably, in the step (3), the stirring time for the second stirring and the stirring time for the third stirring are both not less than 120 s.
Preferably, the second stirring time and the third stirring time are both 120s, and in order to ensure the strength of the pervious concrete, the stirring time is not easy to be too long or too short.
The invention also aims to provide application of the sponge body pervious concrete.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the application of the permeable concrete of the sponge body is characterized in that the application of the permeable concrete in paving roads in a sponge city specifically comprises the following steps:
(1) vibrating and molding the pervious concrete, and pouring and paving the molding material on a construction pavement;
the invention adopts the flat vibrator to vibrate and mold, the vibration time is not easy to overlong, and the segregation phenomenon caused by over-compaction is prevented. Further attention needs to be paid to: paving as fast as possible and forming once as possible.
(2) Immediately covering the concrete with a plastic film after pouring and forming, spraying water when the concrete is condensed, and maintaining for not less than 7 days by spraying water;
the invention is covered by plastic film immediately after casting to keep moisture.
(3) And (3) after the surface is formed for 3-4 days and dried, coating a stabilizing agent on the surface to prevent the permeable concrete from being polluted by dirt to block pores.
The invention applies the stabilizer to enhance the durability and the beauty and prevent the permeable concrete from being polluted by pollutants to block the pores for a long time.
According to the technical scheme, compared with the prior art, the sponge concrete and the preparation method and application thereof provided by the invention have the advantages that aggregate, cement, an adhesive and an additive are used as main raw materials, wherein ceramsite is doped into the aggregate to enhance the removal capacity of the pervious concrete on a large number of pollutants in radial-flow rainwater and the water purification capacity of the pervious concrete; when the reinforcing agent special for the pervious concrete is doped during preparation, cement and aggregate are effectively and tightly bonded together, and a gap is formed on the premise of achieving the designed strength, so that rapid water penetration is ensured, and the strength requirement of the pervious concrete is met;
according to the invention, the types and the using amounts of the adhesive and the additive (water reducing agent) suitable for the sponge pervious concrete are preferably selected through proper raw material proportion, and the pervious concrete has excellent dirt removing capability, compressive strength and water permeability coefficient, can meet various engineering requirements for water permeability of the concrete, and is beneficial to maintaining ecological balance and realizing sustainable development;
the invention has simple manufacturing process and wide material source, is suitable for large-scale production, can be cast in situ and prefabricated in factories, and has great market application and popularization values.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses sponge body pervious concrete with strong dirt removing capability and high mechanical strength, and a preparation method and application thereof.
In order to better understand the present invention, the following examples further specifically illustrate the present invention, but should not be understood as the definition of the invention, for those skilled in the art who make some insubstantial modifications and adjustments according to the above invention are considered to fall within the scope of the present invention.
The invention discloses sponge body water-permeable concrete which is prepared from the following raw materials in parts by weight: 75-85 parts of aggregate, 10-20 parts of cement, 5-10 parts of water, 0.3-0.8 part of adhesive, 0.2-0.6 part of additive and 1.0-2.0 parts of inorganic pigment.
In order to further realize the technical effect of the invention, the sponge body pervious concrete is prepared from the following raw materials in proportion: 75-80 parts of aggregate, 10-15 parts of cement, 5-8 parts of water, 0.5-0.8 part of adhesive, 0.2-0.5 part of additive and 1.0-1.5 parts of inorganic pigment.
In order to further realize the technical effect of the invention, the aggregate is crushed stone or pebble with the thickness of 5-10 mm, the crushing value of the aggregate is less than or equal to 15 percent, the needle-shaped content is less than or equal to 15 percent, the mud content is less than or equal to 1 percent, and the apparent density is more than or equal to 2500kg/m3The bulk density is more than or equal to 1350kg/m3The porosity is less than or equal to 47 percent.
In order to further achieve the technical effect of the invention, the cement is white portland cement or colored cement with a strength grade higher than 42.5.
In order to further achieve the technical effect of the invention, the adhesive is a polymer composed of powdered monomers, and the adhesive is one of styrene-butadiene latex (SB latex), styrene-acrylic latex (AS latex) or ABS latex.
In order to further realize the technical effect of the invention, the additive is a water reducing agent, and the additive is a polycarboxylic acid high-efficiency water reducing agent, and the water reducing rate is more than or equal to 8%.
The invention also discloses a preparation method of the sponge body pervious concrete, which specifically comprises the following steps:
(1) respectively weighing the following raw materials in formula ratio: 75-85 parts of aggregate, 10-20 parts of cement, 5-10 parts of water, 0.3-0.8 part of adhesive, 0.2-0.6 part of additive and 1.0-2.0 parts of inorganic pigment;
(2) fully and uniformly mixing the admixture weighed in the step (1) and water to obtain a mixed solution;
(3) and (3) putting the adhesive and the aggregate weighed in the step (1) into a stirrer to be stirred for 25-35 s, then adding the mixed liquid obtained in the step (2) to be uniformly stirred, finally adding the cement and the inorganic pigment weighed in the step (1), and continuously stirring to obtain the sponge body pervious concrete.
In order to further achieve the technical effects of the present invention, in the step (3), the stirring time of the second stirring and the third stirring is not less than 120 s.
The invention specifically discloses an application of sponge body water-permeable concrete in paving roads in a sponge city, which specifically comprises the following steps:
(1) vibrating and molding the pervious concrete, and pouring and paving the molding material on a construction pavement;
(2) immediately covering the concrete with a plastic film after pouring and forming, spraying water when the concrete is condensed, and maintaining for not less than 7 days by spraying water;
(3) and (3) after the surface is formed for 3-4 days and dried, coating a stabilizing agent on the surface to prevent the permeable concrete from being polluted by dirt to block pores.
The technical solution of the present invention will be further described with reference to the following specific examples.
Example 1:
a preparation method of sponge body pervious concrete specifically comprises the following steps:
(1) respectively weighing the following raw materials in formula ratio: 78 parts of aggregate, 12 parts of cement, 6 parts of water, 0.48 part of adhesive, 0.25 part of additive and 1.2 parts of inorganic pigment;
(2) fully and uniformly mixing the admixture weighed in the step (1) and water to obtain a mixed solution;
(3) and (3) putting the adhesive and the aggregate weighed in the step (1) into a stirrer to stir for 30s, then adding the mixed solution obtained in the step (2) to stir for 120s to mix uniformly, finally adding the cement and the inorganic pigment weighed in the step (1), and continuously stirring for 120s to obtain the sponge body permeable concrete.
Example 2:
a preparation method of sponge body pervious concrete specifically comprises the following steps:
(1) respectively weighing the following raw materials in formula ratio: 80 parts of aggregate, 14 parts of cement, 7 parts of water, 0.50 part of adhesive, 0.35 part of additive and 1.4 parts of inorganic pigment;
(2) fully and uniformly mixing the admixture weighed in the step (1) and water to obtain a mixed solution;
(3) and (3) putting the adhesive and the aggregate weighed in the step (1) into a stirrer to stir for 30s, then adding the mixed solution obtained in the step (2) to stir for 120s to mix uniformly, finally adding the cement and the inorganic pigment weighed in the step (1), and continuously stirring for 120s to obtain the sponge body permeable concrete.
Example 3:
a preparation method of sponge body pervious concrete specifically comprises the following steps:
(1) respectively weighing the following raw materials in formula ratio: 82 parts of aggregate, 16 parts of cement, 8 parts of water, 0.66 part of adhesive, 0.45 part of additive and 1.6 parts of inorganic pigment;
(2) fully and uniformly mixing the admixture weighed in the step (1) and water to obtain a mixed solution;
(3) and (3) putting the adhesive and the aggregate weighed in the step (1) into a stirrer to stir for 30s, then adding the mixed solution obtained in the step (2) to stir for 120s to mix uniformly, finally adding the cement and the inorganic pigment weighed in the step (1), and continuously stirring for 120s to obtain the sponge body permeable concrete.
Example 4:
a preparation method of sponge body pervious concrete specifically comprises the following steps:
(1) respectively weighing the following raw materials in formula ratio: 84 parts of aggregate, 18 parts of cement, 9 parts of water, 0.75 part of adhesive, 0.50 part of additive and 1.8 parts of inorganic pigment;
(2) fully and uniformly mixing the admixture weighed in the step (1) and water to obtain a mixed solution;
(3) and (3) putting the adhesive and the aggregate weighed in the step (1) into a stirrer to stir for 30s, then adding the mixed solution obtained in the step (2) to stir for 120s to mix uniformly, finally adding the cement and the inorganic pigment weighed in the step (1), and continuously stirring for 120s to obtain the sponge body permeable concrete.
The sponge body pervious concrete prepared in examples 1-4 is subjected to compressive strength and water permeability coefficient performance tests. The test of the compressive strength and the water permeability is carried out according to the method in section 2.3 in the technical 'design of mix proportion of permeable concrete and performance research' of Gancingqing, and the specific test results are shown in table 1.
Table 1 results of performance testing
As can be seen from Table 1, the compressive strength and the water permeability of the sponge pervious concrete prepared by the invention are superior to those of the same industry performance test standard, can meet various engineering requirements for water permeability of concrete, and is beneficial to maintaining ecological balance and realizing sustainable development.
And (3) testing the purification effect: the sponge body permeable concrete sample prepared in the example 1-4 is placed in a purification simulation device for a purification test, a purified water sample is collected at a water outlet of the device, and SS and COD of the water sample in the obtained sample bottle are determined, wherein specific test results are shown in Table 2.
TABLE 2 decontamination test results
The test results of the embodiments show that a large amount of pollutants are carried in the rainwater runoff caused by garbage, motor vehicle emissions, dust on the exposed surface and the like, and the removal capability of the pervious concrete on the large amount of pollutants in the rainwater runoff is enhanced by adding the ceramsite in the preparation process and utilizing the characteristics of microporous surface, criss-cross internal net and large specific surface area.
In addition, the strength grades of the pervious concrete are mostly C20, C25 and C30, and the concrete sponge pervious concrete is prepared as follows:
example 5:
a preparation method of sponge body pervious concrete with the strength grade of C20 specifically comprises the following steps:
(1) respectively weighing the following raw materials in formula ratio: 80 parts of aggregate, 14 parts of cement, 8 parts of water, 0.50 part of adhesive, 0.40 part of additive and 1.2 parts of inorganic pigment;
(2) fully and uniformly mixing the admixture weighed in the step (1) and water to obtain a mixed solution;
(3) and (3) putting the adhesive and the aggregate weighed in the step (1) into a stirrer to stir for 30s, then adding the mixed solution obtained in the step (2) to stir for 120s to mix uniformly, finally adding the cement and the inorganic pigment weighed in the step (1), and continuously stirring for 120s to obtain the sponge body permeable concrete.
Example 6:
a preparation method of sponge body pervious concrete with the strength grade of C25 specifically comprises the following steps:
(1) respectively weighing the following raw materials in formula ratio: 78 parts of aggregate, 18 parts of cement, 7 parts of water, 0.60 part of adhesive, 0.50 part of additive and 1.1 part of inorganic pigment;
(2) fully and uniformly mixing the admixture weighed in the step (1) and water to obtain a mixed solution;
(3) and (3) putting the adhesive and the aggregate weighed in the step (1) into a stirrer to stir for 30s, then adding the mixed solution obtained in the step (2) to stir for 120s to mix uniformly, finally adding the cement and the inorganic pigment weighed in the step (1), and continuously stirring for 120s to obtain the sponge body permeable concrete.
Example 7:
a preparation method of sponge body pervious concrete with the strength grade of C30 specifically comprises the following steps:
(1) respectively weighing the following raw materials in formula ratio: 76 parts of aggregate, 20 parts of cement, 7.5 parts of water, 0.75 part of adhesive, 0.50 part of additive and 1.4 parts of inorganic pigment;
(2) fully and uniformly mixing the admixture weighed in the step (1) and water to obtain a mixed solution;
(3) and (3) putting the adhesive and the aggregate weighed in the step (1) into a stirrer to stir for 30s, then adding the mixed solution obtained in the step (2) to stir for 120s to mix uniformly, finally adding the cement and the inorganic pigment weighed in the step (1), and continuously stirring for 120s to obtain the sponge body permeable concrete.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The sponge body water-permeable concrete is characterized by being prepared from the following raw materials in parts by weight: 75-85 parts of aggregate, 10-20 parts of cement, 5-10 parts of water, 0.3-0.8 part of adhesive, 0.2-0.6 part of additive and 1.0-2.0 parts of inorganic pigment.
2. The sponge body water-permeable concrete according to claim 1, which is prepared from the following raw materials in parts by weight: 75-80 parts of aggregate, 10-15 parts of cement, 5-8 parts of water, 0.5-0.8 part of adhesive, 0.2-0.5 part of additive and 1.0-1.5 parts of inorganic pigment.
3. The sponge body pervious concrete according to any one of claims 1-2, wherein the aggregate is crushed stone or pebble with a thickness of 5-10 mm, the crushing value of the aggregate is less than or equal to 15%, the needle-shaped content of the aggregate is less than or equal to 15%, the mud content is less than or equal to 1%, and the apparent density is greater than or equal to 2500kg/m3The bulk density is more than or equal to 1350kg/m3The porosity is less than or equal to 47 percent.
4. A sponge body water-permeable concrete according to any one of claims 1 to 3, wherein the cement is white portland cement or colored cement with a strength grade higher than 42.5.
5. The sponge body water permeable concrete according to any one of claims 1 to 4, wherein the adhesive is a polymer composed of powdered monomers, and the adhesive is one of styrene-butadiene latex (SB latex), styrene-acrylic latex (AS latex) or ABS latex.
6. The sponge body water-permeable concrete according to any one of claims 1 to 5, wherein the additive is a water reducing agent, and the additive is a polycarboxylic acid type high efficiency water reducing agent, and the water reducing rate is not less than 8%.
7. The preparation method of the sponge body pervious concrete is characterized by comprising the following steps:
(1) respectively weighing the following raw materials in formula ratio: 75-85 parts of aggregate, 10-20 parts of cement, 5-10 parts of water, 0.3-0.8 part of adhesive, 0.2-0.6 part of additive and 1.0-2.0 parts of inorganic pigment;
(2) fully and uniformly mixing the admixture weighed in the step (1) and water to obtain a mixed solution;
(3) and (3) putting the adhesive and the aggregate weighed in the step (1) into a stirrer to be stirred for 25-35 s, then adding the mixed liquid obtained in the step (2) to be uniformly stirred, finally adding the cement and the inorganic pigment weighed in the step (1), and continuously stirring to obtain the sponge body permeable concrete.
8. The method for preparing the spongy mass permeable concrete according to claim 7, wherein in the step (3), the stirring time of the second stirring and the third stirring is not less than 120 s.
9. The application of the permeable concrete for the sponge is characterized by comprising the following steps of:
(1) vibrating and molding the pervious concrete, and pouring and paving the molding material on a construction pavement;
(2) immediately covering the concrete with a plastic film after pouring and forming, spraying water when the concrete is condensed, and watering and maintaining for not less than 7 days;
(3) and (3) after the surface is formed for 3-4 days and dried, coating a stabilizing agent on the surface to prevent the permeable concrete from being polluted by dirt to block pores.
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| CN112047701A (en) * | 2020-08-10 | 2020-12-08 | 滁州职业技术学院 | High-strength porous pervious concrete pavement and preparation method thereof |
| CN112939518A (en) * | 2021-01-27 | 2021-06-11 | 邢台路桥建设总公司 | Pavement structure adhesive, porous concrete base layer and permeable pavement |
| CN113511782A (en) * | 2021-07-22 | 2021-10-19 | 长沙理工大学 | Collecting, purifying and recycling process for polluted runoff of liquid bulk cargo wharf |
| CN113529895A (en) * | 2021-07-22 | 2021-10-22 | 长沙理工大学 | Wharf rainwater collecting, storing, purifying and recycling system |
| CN113603291A (en) * | 2021-07-22 | 2021-11-05 | 长沙理工大学 | Wharf rainwater collecting, purifying and recycling process |
| CN113775017A (en) * | 2021-07-22 | 2021-12-10 | 长沙理工大学 | Preparation and recycling method of sponge concrete |
| CN115057665A (en) * | 2022-06-08 | 2022-09-16 | 厦门海投建材有限公司 | Pervious concrete and production process thereof |
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| CN113511782A (en) * | 2021-07-22 | 2021-10-19 | 长沙理工大学 | Collecting, purifying and recycling process for polluted runoff of liquid bulk cargo wharf |
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| CN113603291A (en) * | 2021-07-22 | 2021-11-05 | 长沙理工大学 | Wharf rainwater collecting, purifying and recycling process |
| CN113775017A (en) * | 2021-07-22 | 2021-12-10 | 长沙理工大学 | Preparation and recycling method of sponge concrete |
| CN115057665A (en) * | 2022-06-08 | 2022-09-16 | 厦门海投建材有限公司 | Pervious concrete and production process thereof |
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