CN113511858A - Preparation and construction method of pervious concrete - Google Patents

Preparation and construction method of pervious concrete Download PDF

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Publication number
CN113511858A
CN113511858A CN202110526703.8A CN202110526703A CN113511858A CN 113511858 A CN113511858 A CN 113511858A CN 202110526703 A CN202110526703 A CN 202110526703A CN 113511858 A CN113511858 A CN 113511858A
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pervious concrete
aggregate
parts
pouring
preparation
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Inventor
林泽坚
林泽峰
林炎坤
邓晓均
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Guangdong Huiqiang Admixture Co ltd
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Guangdong Huiqiang Admixture Co ltd
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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
    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/04—Carboxylic acids; Salts, anhydrides or esters thereof
    • C04B24/06—Carboxylic acids; Salts, anhydrides or esters thereof containing hydroxy groups
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00—Details of pavings
    • E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
    • E01C11/224—Surface drainage of streets
    • E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00—Coherent pavings made in situ
    • E01C7/08—Coherent pavings made in situ made of road-metal and binders
    • E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
    • E01C7/14—Concrete paving
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Road Paving Structures (AREA)

Abstract

The invention discloses a preparation and construction method of pervious concrete, wherein raw materials of the pervious concrete comprise aggregate, cement, a reinforcing and toughening agent, a composite additive and water in a weight ratio of 2-4: 1: 0.1-0.5: 0.01-0.05: 0.2-0.4, and the preparation and construction method can be summarized into preparation of premixed slurry, wetting and paving of the aggregate, pouring of the slurry, jolt-squeeze and maintenance and the like. The invention adopts the method of premixing the slurry, simplifies the preparation and construction process of the pervious concrete and has the advantages of energy conservation and emission reduction; the novel reinforcing and toughening agent and the composite additive are adopted, so that the fluidity and cohesiveness of slurry are met, and later construction is facilitated. In addition, the pervious concrete product prepared by the invention has high quality, and the 28d compressive strength meets the design value.

Description

Preparation and construction method of pervious concrete
Technical Field
The invention relates to the technical field of concrete, in particular to a preparation and construction method of pervious concrete.
Background
At present, urban roads are generally impervious concrete or cement pavements, and can lead to surface ponding to seriously cause urban waterlogging when rainy day drainage is not smooth, influence pedestrian's trip and vehicle current, can appear the drowned incident of person even. The demand of sponge cities comes from the beginning, and the road of the city is mainly of a pervious concrete structure, so that the phenomenon of water accumulation on the road surface can be effectively solved.
At present, the preparation and construction methods of common pervious concrete are as follows:
in the preparation of pervious concrete, the pervious concrete mainly comprises cement, admixture, fine aggregate, composite additive and water, and a cementing agent is used for part of pervious concrete, but the commonly used additive is mainly a water reducing agent with dispersion function, and the cementing agent is mainly rubber powder. Patent CN106904903B discloses a gradient pervious concrete product, wherein the compound admixture used in the product is a compound of water reducing agent, thickening agent, retarder and early strength agent, which can satisfy the preparation and construction process of pervious concrete, but the bonding strength of hardened concrete is not high. Patent CN109437757A discloses a method for preparing pervious concrete, which uses a polycarboxylic acid water reducing agent to satisfy the plasticity of the mixture, and uses polypropylene fibers to increase the toughness of the pervious concrete, but the fibers are used in the concrete without slump, and are difficult to be uniformly dispersed in the system. Patent CN106192657A discloses a method for preparing ecological pervious concrete, wherein the cementing agent comprises silica powder, water reducing agent and dry glue powder, the prepared concrete pavement has the advantages of high strength, long service life and difficult cracking, but the 28-day flexural strength is only 2.5MPa, and the bonding strength between pervious concrete aggregates is not high.
In the aspect of pervious concrete construction, as the cellular structure and porosity of pervious concrete are required to be ensured, the pervious concrete is generally mixed by adopting a cementing material and an aggregate, and in order to avoid blocking of pervious channels by slurry during construction, the pervious concrete mixture has poor plasticity or semi-dry hardness in a state. However, the process can greatly shorten the construction time, and the condition that the pervious concrete reaches the initial setting state and is not completely constructed is easily caused. There are also methods of using premixed slurry, and patent CN110078443A discloses a construction process of using slurry for premixing and then mixing with aggregate at a construction site. The method effectively solves the problems of loading and easy hardening of the transported premixed concrete; the environmental pollution problems such as dust emission phenomenon and the like are avoided in the construction site. However, slurry and aggregate still need to be mixed in the construction site, and manpower and energy are still consumed.
In summary, the problems of the prior art are as follows:
(1) the pervious concrete has poor bonding strength and toughness. In the prior art, various fiber materials or rubber powder are directly used for improving the bonding strength and toughness, and the fiber is unevenly distributed and has large strength dispersion degree in the concrete preparation process; the rubber powder has limited improvement on the bonding strength.
(2) The pervious concrete is complex in preparation and construction process. In the prior art, either a one-step stirring forming process is adopted, or a process of adding aggregate after premixing slurry and mixing on site is adopted, and the two construction processes have the problem of complex process and are not beneficial to energy conservation and emission reduction.
Disclosure of Invention
In order to solve the problems in the prior art, the embodiment of the invention provides a preparation and construction method of pervious concrete. The technical scheme is as follows:
on one hand, the preparation and construction method of the pervious concrete is provided, and comprises the following steps:
(1) preparing a pervious concrete raw material: 900 to 1800 portions of aggregate, 450 portions of cement, 45 to 225 portions of reinforcing and toughening agent, 4.5 to 22.5 portions of composite additive and 90 to 180 portions of water;
(2) pre-mixing the slurry: gradually adding cement and a reinforcing and toughening agent into a forced mixer, starting stirring, pouring a mixed solution of a composite additive and water after uniformly stirring, and stirring for 2-4 min to obtain a ready-mixed slurry;
(3) wetting and spreading aggregate: wetting aggregate in advance, and then directly spreading the aggregate on a construction part;
(4) pouring slurry and jolting: uniformly pouring the premixed slurry on the surface of the aggregate, aligning the flatness by using a long rod compaction roller, and then compacting by using a flat vibrator and a roller;
(5) and (3) maintaining the pervious concrete: and after the pouring and the jolt squeeze are finished, the flatness is checked to meet the requirement, the plastic film is covered for maintenance, the watering maintenance is carried out after one day of pouring, and the wet maintenance time is not less than ten days.
Preferably, the aggregate is crushed stone with the particle size of 5 mm-10 mm.
Preferably, the cement is portland cement, wherein the specific surface area of the cement is 500m2/kg～650m2Per kg, strength grade not less than 42.5.
Preferably: the reinforcing and toughening agent contains fly ash, rosmarinic acid, triisopropanolamine and an aminosilane coupling agent in a mass ratio of 5:1:3: 1. The preparation method of the reinforcing and toughening agent comprises the following steps:
(1) adding the fly ash and the rosmarinic acid into a mixing reaction kettle for premixing;
(2) triisopropanolamine and aminosilane coupling agent are prepared into mixed solution, and the mixed solution is uniformly stirred for later use;
(3) and (3) adopting a grinding and activating process combining mixing grinding and spray charging, and spraying mixed liquid of triisopropanolamine and an aminosilane coupling agent into the reaction kettle while mixing grinding to promote activity enhancement, full chemical reaction and efficient compounding of all components to obtain the enhanced toughening agent.
Preferably, the composite admixture is a polycarboxylic acid high-performance water reducing agent and nanocellulose, and the mass ratio of the polycarboxylic acid high-performance water reducing agent to the nanocellulose is 50: 1.
Preferably, the vibration molding time of the flat plate vibrator is controlled to be 30-60 s; the rolling pressure is controlled between 1.0MPa and 2.0 MPa.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
according to the preparation and construction method of the pervious concrete, rosmarinic acid molecules with a double-catechol structure with an adhesion function are used in preparation according to a bionic mussel adhesion principle, and are combined with hydroxyl on the surface of a cementing material through a silane coupling agent, and rosmarinic acid with an adhesion and toughening effect is combined on the surface of the cementing material through chemical bonds by utilizing dehydration condensation reaction of active hydrogen on an amino group and rosmarinic acid. Then in a high-pH value concrete system, the bicatechol structures in the rosmarinic acid molecules are mutually crosslinked to form high-molecular reticular tough protein filaments, so that a discontinuous microscopic biological adhesion bracket is formed among the reinforcing toughening agent, concrete aggregate and cement particles, and the adhesive force among raw materials of concrete is increased, thereby improving the toughness of the microstructure of the concrete. Meanwhile, by a novel construction process, firstly, the aggregate is paved on the road surface, the ready-mixed cement paste is directly poured and leveled, and then the pervious concrete is obtained through vibration and compression molding.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The invention relates to a preparation and construction method of pervious concrete, which comprises the following steps:
(1) preparing a pervious concrete raw material: 900 to 1800 portions of aggregate, 450 portions of cement, 45 to 225 portions of reinforcing and toughening agent, 4.5 to 22.5 portions of composite additive and 90 to 180 portions of water;
(2) pre-mixing the slurry: gradually adding cement and a reinforcing and toughening agent into a forced mixer, starting stirring, pouring a mixed solution of a composite additive and water after uniformly stirring, and stirring for 2-4 min to obtain a ready-mixed slurry;
(3) wetting and spreading aggregate: wetting aggregate in advance, and then directly spreading the aggregate on a construction part;
(4) pouring slurry and jolting: uniformly pouring the premixed slurry on the surface of the aggregate, aligning the flatness by using a long rod compaction roller, and then compacting by using a flat vibrator and a roller;
(5) and (3) maintaining the pervious concrete: and after the pouring and the jolt squeeze are finished, the flatness is checked to meet the requirement, the plastic film is covered for maintenance, the watering maintenance is carried out after one day of pouring, and the wet maintenance time is not less than ten days.
The aggregate provided by the embodiment of the invention is crushed stone with the particle size of 5-10 mm.
The cement provided by the embodiment of the invention is portland cement, wherein the specific surface area of the cement is 500m2/kg～650m2Per kg, strength grade not less than 42.5.
The reinforcing and toughening agent provided by the embodiment of the invention contains fly ash, rosmarinic acid, triisopropanolamine and an aminosilane coupling agent in a mass ratio of 5:1:3: 1. The preparation method of the reinforcing and toughening agent comprises the following steps:
(1) adding the fly ash and the rosmarinic acid into a mixing reaction kettle for premixing;
(2) triisopropanolamine and aminosilane coupling agent are prepared into mixed solution, and the mixed solution is uniformly stirred for later use;
(3) and (3) adopting a grinding and activating process combining mixing grinding and spray charging, and spraying mixed liquid of triisopropanolamine and an aminosilane coupling agent into the reaction kettle while mixing grinding to promote activity enhancement, full chemical reaction and efficient compounding of all components to obtain the enhanced toughening agent.
The composite additive provided by the embodiment of the invention is a polycarboxylic acid high-performance water reducing agent and nano-cellulose, and the mass ratio of the polycarboxylic acid high-performance water reducing agent to the nano-cellulose is 50: 1.
The vibration forming time of the flat plate vibrator provided by the embodiment of the invention is controlled to be 30-60 s; the rolling pressure is controlled between 1.0MPa and 2.0 MPa.
The invention is further described with reference to specific examples.
Example 1
The embodiment of the invention provides a preparation and construction method of pervious concrete, which comprises the following steps: 900 parts of aggregate, 450 parts of cement, 225 parts of reinforcing and toughening agent, 22.5 parts of composite admixture and 150 parts of water. The preparation and construction method comprises the following steps:
step one, sequentially adding 450 parts of water with a specific surface area of 500m into a forced mixer2Per kg of cement, 225 parts of reinforcing and toughening agentStarting stirring, pouring a mixed solution of 22.5 parts of the composite additive and 150 parts of water after uniformly stirring, and stirring for 2min to obtain ready-mixed slurry;
step two, wetting 900 parts of aggregate in advance, and then directly spreading the aggregate on a construction part;
uniformly pouring the ready-mixed slurry on the surface of the aggregate, accurately finding the flatness by using a long rod compaction roller, compacting by using a flat vibrator and a roller, wherein the vibration forming time of the flat vibrator is 30s, and the rolling pressure is controlled at 1.0 MPa;
and step four, after the pouring and the vibration pressing are finished, the flatness is checked to meet the requirements, a plastic film is covered for curing, watering curing is carried out after one day of pouring, and the wet curing time is ten days.
Example 2
The embodiment of the invention provides a preparation and construction method of pervious concrete, which comprises the following steps: 1100 parts of aggregate, 450 parts of cement, 190 parts of reinforcing toughening agent, 19 parts of composite admixture and 140 parts of water. The preparation and construction method comprises the following steps:
step one, sequentially adding 450 parts of 550m specific surface area into a forced mixer2Stirring 190 parts of reinforcing and toughening agent per kg of cement, pouring a mixed solution of 19 parts of composite additive and 140 parts of water after uniformly stirring, and stirring for 3min to obtain ready-mixed slurry;
step two, wetting 1100 parts of aggregate in advance, and then directly spreading the aggregate on a construction part;
uniformly pouring the ready-mixed slurry on the surface of the aggregate, accurately finding the flatness by using a long rod compaction roller, compacting by using a flat vibrator and a roller, wherein the vibration forming time of the flat vibrator is 40s, and the rolling pressure is controlled at 1.2 MPa;
and step four, after the pouring and the vibration pressing are finished, the flatness is checked to meet the requirements, a plastic film is covered for curing, watering curing is carried out after one day of pouring, and the wet curing time is eleven days.
Example 3
The embodiment of the invention provides a preparation and construction method of pervious concrete, which comprises the following steps: 1300 parts of aggregate, 450 parts of cement, 160 parts of reinforcing toughening agent, 16 parts of composite admixture and 130 parts of water. The preparation and construction method comprises the following steps:
step one, sequentially adding 450 parts of raw materials with specific surface area of 600m into a forced mixer2Stirring the cement per kg and 160 parts of reinforcing and toughening agent, pouring a mixed solution of 16 parts of composite additive and 130 parts of water after uniformly stirring, and stirring for 4min to obtain ready-mixed slurry;
step two, wetting 1300 parts of aggregate in advance, and then directly spreading the aggregate on a construction part;
uniformly pouring the ready-mixed slurry on the surface of the aggregate, accurately finding the flatness by using a long rod compaction roller, compacting by using a flat vibrator and a roller, vibrating and forming for 50s by using the flat vibrator, and controlling the rolling pressure to be 1.4 MPa;
and step four, after the pouring and the vibration pressing are finished, the flatness is checked to meet the requirements, the plastic film is covered for curing, the watering curing is carried out after one day of pouring, and the wet curing time is twelve days.
Example 4
The embodiment of the invention provides a preparation and construction method of pervious concrete, which comprises the following steps: 1500 parts of aggregate, 450 parts of cement, 130 parts of reinforcing and toughening agent, 13 parts of composite admixture and 120 parts of water. The preparation and construction method comprises the following steps:
step one, sequentially adding 450 parts of raw materials with specific surface area of 650m into a forced mixer2Stirring cement per kg and 130 parts of reinforcing and toughening agent, pouring a mixed solution of 13 parts of composite additive and 120 parts of water after uniformly stirring, and stirring for 2min to obtain ready-mixed slurry;
wetting 1500 parts of aggregate in advance, and then directly paving the aggregate on a construction part;
uniformly pouring the ready-mixed slurry on the surface of the aggregate, accurately finding the flatness by using a long rod compaction roller, compacting by using a flat vibrator and a roller, wherein the vibration forming time of the flat vibrator is 60s, and the rolling pressure is controlled at 1.6 MPa;
and step four, after the pouring and the vibration pressing are finished, the flatness is checked to meet the requirements, the plastic film is covered for curing, the watering curing is carried out after one day of pouring, and the wet curing time is thirteen days.
Example 5
The embodiment of the invention provides a preparation and construction method of pervious concrete, which comprises the following steps: 1700 parts of aggregate, 450 parts of cement, 100 parts of reinforcing toughening agent, 10 parts of composite additive and 110 parts of water. The preparation and construction method comprises the following steps:
step one, sequentially adding 450 parts of water with a specific surface area of 500m into a forced mixer2Stirring 100 parts of reinforcing and toughening agent and 100 parts of cement per kg, pouring a mixed solution of 10 parts of composite additive and 110 parts of water after uniformly stirring, and stirring for 3min to obtain ready-mixed slurry;
step two, pre-wetting 1700 parts of aggregate, and then directly spreading the aggregate on a construction part;
uniformly pouring the ready-mixed slurry on the surface of the aggregate, accurately finding the flatness by using a long rod compaction roller, compacting by using a flat vibrator and a roller, wherein the vibration forming time of the flat vibrator is 60s, and the rolling pressure is controlled at 1.8 MPa;
and step four, after the pouring and the shock pressure are finished, the flatness is checked to meet the requirements, a plastic film is covered for curing, watering curing is carried out after one day of pouring, and the wet curing time is fourteen days.
Example 6
The embodiment of the invention provides a preparation and construction method of pervious concrete, which comprises the following steps: 1800 parts of aggregate, 450 parts of cement, 70 parts of reinforcing toughening agent, 7 parts of composite additive and 100 parts of water.
The preparation and construction method comprises the following steps:
step one, sequentially adding 450 parts of 550m specific surface area into a forced mixer2Stirring the cement per kg and 70 parts of reinforcing and toughening agent, pouring a mixed solution of 7 parts of composite additive and 100 parts of water after uniformly stirring, and stirring for 4min to obtain ready-mixed slurry;
wetting 1800 parts of aggregate in advance, and then directly paving the aggregate on a construction part;
uniformly pouring the ready-mixed slurry on the surface of the aggregate, accurately finding the flatness by using a long rod compaction roller, compacting by using a flat vibrator and a roller, wherein the vibration forming time of the flat vibrator is 60s, and the rolling pressure is controlled at 2.0 MPa;
and step four, after the pouring and the shock pressure are finished, the flatness is checked to meet the requirements, a plastic film is covered for curing, watering curing is carried out after one day of pouring, and the wet curing time is fourteen days.
Example 7
The embodiment of the invention provides a preparation and construction method of pervious concrete, which comprises the following steps: 1800 parts of aggregate, 450 parts of cement, 45 parts of reinforcing toughening agent, 4.5 parts of composite additive and 90 parts of water.
The preparation and construction method comprises the following steps:
step one, sequentially adding 450 parts of raw materials with specific surface area of 600m into a forced mixer2Stirring the cement per kg and 45 parts of reinforcing and toughening agent, pouring a mixed solution of 4.5 parts of composite additive and 90 parts of water after uniformly stirring, and stirring for 2min to obtain a ready-mixed slurry;
wetting 1800 parts of aggregate in advance, and then directly paving the aggregate on a construction part;
uniformly pouring the ready-mixed slurry on the surface of the aggregate, accurately finding the flatness by using a long rod compaction roller, compacting by using a flat vibrator and a roller, wherein the vibration forming time of the flat vibrator is 60s, and the rolling pressure is controlled at 2.0 MPa;
and step four, after the pouring and the shock pressure are finished, the flatness is checked to meet the requirements, a plastic film is covered for curing, watering curing is carried out after one day of pouring, and the wet curing time is fourteen days.
Example 8
The embodiment of the invention provides a preparation and construction method of pervious concrete, which comprises the following steps: 1600 parts of aggregate, 450 parts of cement, 120 parts of reinforcing toughening agent, 8.5 parts of composite additive and 135 parts of water. The preparation and construction method comprises the following steps:
step one, sequentially adding 450 parts of raw materials with specific surface area of 650m into a forced mixer2Stirring the cement per kg and 120 parts of reinforcing and toughening agent, pouring the mixed solution of 8.5 parts of composite additive and 135 parts of water after uniformly stirring, and stirring for 3min to obtain pre-mixed slurry;
step two, wetting 1600 parts of aggregate in advance, and then directly spreading the aggregate on a construction part;
uniformly pouring the ready-mixed slurry on the surface of the aggregate, accurately finding the flatness by using a long rod compaction roller, compacting by using a flat vibrator and a roller, wherein the vibration forming time of the flat vibrator is 55s, and the rolling pressure is controlled at 1.9 MPa;
and step four, after the pouring and the vibration pressing are finished, the flatness is checked to meet the requirements, the plastic film is covered for curing, the watering curing is carried out after one day of pouring, and the wet curing time is twelve days.
Example 9
The embodiment of the invention provides a preparation and construction method of pervious concrete, which comprises the following steps: 1400 parts of aggregate, 450 parts of cement, 180 parts of reinforcing and toughening agent, 13 parts of composite additive and 150 parts of water. The preparation and construction method comprises the following steps:
step one, sequentially adding 450 parts of 550m specific surface area into a forced mixer2Stirring the cement per kg and 180 parts of reinforcing and toughening agent, pouring a mixed solution of 13 parts of composite additive and 150 parts of water after uniformly stirring, and stirring for 3min to obtain ready-mixed slurry;
step two, wetting 1400 parts of aggregate in advance, and then directly spreading the aggregate on a construction part;
uniformly pouring the ready-mixed slurry on the surface of the aggregate, accurately finding the flatness by using a long rod compaction roller, compacting by using a flat vibrator and a roller, wherein the vibration forming time of the flat vibrator is 30s, and the rolling pressure is controlled at 1.6 MPa;
and step four, after the pouring and the vibration pressing are finished, the flatness is checked to meet the requirements, the plastic film is covered for curing, the watering curing is carried out after one day of pouring, and the wet curing time is twelve days.
Example 10
The embodiment of the invention provides a preparation and construction method of pervious concrete, which comprises the following steps: 1000 parts of aggregate, 450 parts of cement, 200 parts of reinforcing and toughening agent, 15 parts of composite additive and 150 parts of water. The preparation and construction method comprises the following steps:
step one, sequentially adding 450 parts of raw materials with specific surface area of 650m into a forced mixer2Per kg ofStarting stirring cement and 200 parts of reinforcing and toughening agent, pouring a mixed solution of 15 parts of composite additive and 150 parts of water after uniformly stirring, and stirring for 4min to obtain ready-mixed slurry;
step two, wetting 1000 parts of aggregate in advance, and then directly spreading the aggregate on a construction part;
uniformly pouring the ready-mixed slurry on the surface of the aggregate, accurately finding the flatness by using a long rod compaction roller, compacting by using a flat vibrator and a roller, wherein the vibration forming time of the flat vibrator is 35s, and the rolling pressure is controlled at 1.5 MPa;
and step four, after the pouring and the vibration pressing are finished, the flatness is checked to meet the requirements, a plastic film is covered for curing, watering curing is carried out after one day of pouring, and the wet curing time is ten days.
The performance of the pervious concrete prepared in examples 1-10 is measured by using the concrete permeability coefficient, compressive strength and flexural strength. The reference sample is pervious concrete prepared by adopting the traditional construction process. The detection is carried out according to CJJ/T135-2009 technical Specification for pervious concrete pavements, and the detection item results of C20 pervious concrete are as follows:
table 1 comparison of the Properties of the samples added in examples 1 to 10 and the comparative sample
Figure BDA0003065777540000091
From table 1, it can be derived: for embodiments 1-10, compared with pervious concrete obtained by the traditional preparation and construction process, the pervious concrete sample has superior compressive strength and flexural strength, the crack resistance of the concrete can be remarkably improved, the porosity and the permeability coefficient of the pervious concrete meet the standard requirements, and the permeability of the pervious concrete is ensured. The construction process is simple, convenient and quick, is favorable for market popularization, and has great economic and social benefits.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (6)

1. The preparation and construction method of the pervious concrete is characterized by comprising the following steps:
(1) preparing a pervious concrete raw material: 900 to 1800 portions of aggregate, 450 portions of cement, 45 to 225 portions of reinforcing and toughening agent, 4.5 to 22.5 portions of composite additive and 90 to 180 portions of water;
(2) pre-mixing the slurry: gradually adding cement and a reinforcing and toughening agent into a forced mixer, starting stirring, pouring a mixed solution of a composite additive and water after uniformly stirring, and stirring for 2-4 min to obtain a ready-mixed slurry;
(3) wetting and spreading aggregate: wetting aggregate in advance, and then directly spreading the aggregate on a construction part;
(4) pouring slurry and jolting: uniformly pouring the premixed slurry on the surface of the aggregate, aligning the flatness by using a long rod compaction roller, and then compacting by using a flat vibrator and a roller;
(5) and (3) maintaining the pervious concrete: and after the pouring and the jolt squeeze are finished, the flatness is checked to meet the requirement, the plastic film is covered for maintenance, the watering maintenance is carried out after one day of pouring, and the wet maintenance time is not less than ten days.
2. The method for preparing and constructing pervious concrete according to claim 1, wherein the aggregate is crushed stone with a particle size of 5mm to 10 mm.
3. The method for preparing and constructing pervious concrete according to claim 1, wherein the cement is portland cement, and the specific surface area of the cement is 500m2/kg～650m2Per kg, strength grade not less than 42.5.
4. The method for preparing and constructing pervious concrete according to claim 1, wherein the method comprises the following steps: the reinforcing and toughening agent contains fly ash, rosmarinic acid, triisopropanolamine and an aminosilane coupling agent in a mass ratio of 5:1:3: 1; the preparation method of the reinforcing and toughening agent comprises the following steps:
(1) adding the fly ash and the rosmarinic acid into a mixing reaction kettle for premixing;
(2) triisopropanolamine and aminosilane coupling agent are prepared into mixed solution, and the mixed solution is uniformly stirred for later use;
(3) and (3) adopting a grinding and activating process combining mixing grinding and spray charging, and spraying mixed liquid of triisopropanolamine and an aminosilane coupling agent into the reaction kettle while mixing grinding to promote activity enhancement, full chemical reaction and efficient compounding of all components to obtain the enhanced toughening agent.
5. The preparation and construction method of pervious concrete according to claim 1, wherein the composite admixture is a polycarboxylic acid-based high-performance water reducing agent and nanocellulose, and the mass ratio of the polycarboxylic acid-based high-performance water reducing agent to the nanocellulose is 50: 1.
6. The method for preparing and constructing pervious concrete according to claim 1, wherein the vibration molding time of the flat plate vibrator is controlled to be 30-60 s; the rolling pressure is controlled between 1.0MPa and 2.0 MPa.
CN202110526703.8A 2021-05-14 2021-05-14 Preparation and construction method of pervious concrete Pending CN113511858A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003082215A (en) * 2001-09-13 2003-03-19 Mitsuyoshi Kato Molded article using fly ash as main raw material and method for producing the same
CN101349036A (en) * 2008-09-04 2009-01-21 武汉理工大学 Construction process of throwing and filling aggregate pavement concrete
CN107337375A (en) * 2016-12-07 2017-11-10 江苏苏博特新材料股份有限公司 A kind of concrete admixture and use a kind of its premixing pervious concrete
CN108585696A (en) * 2018-07-11 2018-09-28 中国十七冶集团有限公司 A kind of pervious concrete preparation method of anti-moisture evaporation
CN110054462A (en) * 2019-05-29 2019-07-26 中国十七冶集团有限公司 A kind of premixing proportion of porous concrete mixture and preparation method thereof
CN110512824A (en) * 2019-09-27 2019-11-29 河南人邦科技股份有限公司 A kind of floor heating backfilling process and proprietary material and preparation method thereof
CN110628044A (en) * 2019-08-30 2019-12-31 厦门大学 Ternary crosslinked hydrogel electrolyte, preparation method and application thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003082215A (en) * 2001-09-13 2003-03-19 Mitsuyoshi Kato Molded article using fly ash as main raw material and method for producing the same
CN101349036A (en) * 2008-09-04 2009-01-21 武汉理工大学 Construction process of throwing and filling aggregate pavement concrete
CN107337375A (en) * 2016-12-07 2017-11-10 江苏苏博特新材料股份有限公司 A kind of concrete admixture and use a kind of its premixing pervious concrete
CN108585696A (en) * 2018-07-11 2018-09-28 中国十七冶集团有限公司 A kind of pervious concrete preparation method of anti-moisture evaporation
CN110054462A (en) * 2019-05-29 2019-07-26 中国十七冶集团有限公司 A kind of premixing proportion of porous concrete mixture and preparation method thereof
CN110628044A (en) * 2019-08-30 2019-12-31 厦门大学 Ternary crosslinked hydrogel electrolyte, preparation method and application thereof
CN110512824A (en) * 2019-09-27 2019-11-29 河南人邦科技股份有限公司 A kind of floor heating backfilling process and proprietary material and preparation method thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
张金安等: "《粉煤灰与废旧塑料的综合利用》", 31 August 2005, 北京：国防工业出版社 *
李珍妮等: "仿贻贝黏附性多巴胺的研究与应用进展", 《高分子材料科学与工程》 *

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