CN110683801A - New sound-absorbing vibration-insulating concrete material and preparation method and application thereof - Google Patents
New sound-absorbing vibration-insulating concrete material and preparation method and application thereof Download PDFInfo
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- CN110683801A CN110683801A CN201910979261.5A CN201910979261A CN110683801A CN 110683801 A CN110683801 A CN 110683801A CN 201910979261 A CN201910979261 A CN 201910979261A CN 110683801 A CN110683801 A CN 110683801A
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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
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
- C04B38/106—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam by adding preformed foams
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
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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
- C04B2111/52—Sound-insulating materials
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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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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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 provides a new sound-absorbing and vibration-insulating concrete material which is prepared from the following raw materials, by weight, 590-610 parts of cement, 90-95 parts of fly ash, 390 parts of ceramsite 320-390 parts of water 180-containing materials, 40-100 parts of rubber particles, 1-2 parts of foaming agent, 3-4 parts of air entraining agent and 1-1.5 parts of fibers. The new concrete material has excellent sound absorption and vibration isolation performance, simple preparation method and easily controlled process parameters, is suitable for large-scale production and application, and is particularly suitable for sound insulation and vibration reduction of subway trains.
Description
Technical Field
The invention belongs to the technical field of buildings, and relates to a new sound-absorbing vibration-insulating concrete material, and a preparation method and application thereof.
Background
Concrete is a general term for engineering composite materials in which aggregate is cemented into a whole by a cementing material. The concrete has the characteristics of rich raw materials, low price and simple production process, so that the consumption of the concrete is increased more and more. Meanwhile, the concrete also has the characteristics of high compressive strength, good durability, wide strength grade range and the like. These characteristics make it very widely used, not only in various civil engineering, that is shipbuilding, machinery industry, ocean development, geothermal engineering, etc., but also concrete is an important material.
Noise pollution refers to the interference of noise generated by human beings in activities such as industrial production, building construction, transportation, social life and the like with the living environment of surrounding animals. At present, the most main sources of environmental noise in the world are traffic noise, including noise generated by automobiles, ships, airplanes and trains, and industrial noise, which is also a main pollution source, and besides, like building construction machinery, entertainment public address facilities, even some office equipment, people are loud and loud, and are noise pollution sources. For example, vibration and noise caused by subway train operation are a problem which is worth paying attention to in the ubiquitous subways of various countries in the world, the vibration is listed as one of seven environmental public hazards internationally, the high-speed operation of the subway train is a main generation source of the subway vibration, so that ground buildings along the subway are forced to vibrate, and because subway lines mostly pass through buildings and urban central sections with dense crowds, the subway vibration has certain influence on the environment and the life and work of residents in surrounding buildings.
In the prior art, the mortar brick is usually used as a sound-insulation vibration-damping material to be applied to vibration-proof ditch backfill engineering with high requirements on sound-insulation and vibration-damping effects and sound-insulation and vibration-damping for subway trains, but the sound-insulation and vibration-damping effects are poor, so that a new concrete material with excellent sound-absorption and vibration-damping effects is developed, which is a technical problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
The invention aims to develop a new sound-absorbing vibration-insulating concrete material, and a preparation method and application thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a new sound-absorbing and vibration-insulating concrete material is prepared from 610 parts of cement 590-containing materials, 90-95 parts of fly ash, 390 parts of ceramsite 320-containing materials, 190 parts of water 180-containing materials, 40-100 parts of rubber particles, 1-2 parts of foaming agents, 3-4 parts of air-entraining agents and 1-1.5 parts of fibers.
Further, the new sound-absorbing vibration-insulating concrete material is prepared from the following raw materials, by weight, 600 parts of cement, 92 parts of fly ash, 364.4 parts of ceramsite, 184 parts of water, 80 parts of rubber particles, 1.5 parts of foaming agent, 3.7 parts of air-entraining agent and 1.2 parts of fiber.
Further, the foam in the new sound-absorbing vibration-insulating concrete material accounts for 20% of the total volume of the new sound-absorbing vibration-insulating concrete material.
The adoption of the further beneficial effects is as follows: the foam volume ratio is controlled to be 20%, so that the dead weight of the new concrete material is reduced, the strength of the concrete is not reduced too much, the sound absorption and heat insulation performance of the new concrete material is improved by introducing the foam, and the good balance of light weight, strength and sound absorption performance is realized on the whole.
Furthermore, the rubber particles account for 18 percent of the total weight of the ceramsite and the rubber particles.
The adoption of the further beneficial effects is as follows: the rubber particles have good elasticity and wear resistance and low relative cost, and can form a local skeleton structure with the ceramsite particles to improve the internal friction angle of the microstructure; the rubber particles in the coarse aggregate are controlled to be 18 percent of the total weight of the ceramsite and the rubber particles, so that the dynamic elasticity modulus and the vibration resistance of the new concrete material can be integrally enhanced, and the cost is saved.
Further, the particle size of the fly ash is 0.5-1cm, the ceramsite is 20-30 meshes, and the particle size of the rubber particles is 1-3 mm.
The adoption of the further beneficial effects is as follows: the fly ash ceramsite particles are in a porous honeycomb structure, so that a large amount of cement is saved, the hydration heat, micro-expansion and creep of concrete can be reduced, the fly ash ceramsite particles have a porous structure, the porosity is as high as 50-80%, and the crack resistance and the impermeability of the concrete are enhanced; the fly ash ceramsite particles of 0.5-1cm and the rubber particles of 1-3mm form a multi-gradient coarse aggregate framework, and the multi-gradient coarse aggregate framework is blended with the fine aggregate cement particles to form a framework-dense structure, so that the cohesive force of a microstructure is improved, and the compactness and the vibration isolation performance of a new concrete material are integrally improved.
Further, the foaming agent is an AES foaming agent; the AES foaming agent mainly comprises fatty alcohol polyoxyethylene ether sodium sulfate; the air-entraining agent is a k12 modified air-entraining agent; the main component of the k12 modified air entraining agent is sodium dodecyl benzene sulfonate; the fiber is copper fiber with length of 3-5 cm.
The adoption of the further beneficial effects is as follows: the AES foaming agent is easy to dissolve in water, has excellent foaming performance, does not damage skin and the like, and is environment-friendly and efficient. The k12 modified air-entraining agent can produce a large amount of micro bubbles, improve the fluidity of concrete during mixing, the water resistance and the durability after hardening, reduce the dead weight and enhance the heat insulation and sound absorption performance of a new concrete material. The copper fibers distributed in a random direction are doped into the concrete to form a multi-phase composite material, so that the expansion of micro cracks and the formation of macro cracks in the concrete can be effectively hindered, the tensile property, the bending resistance (crack resistance), the impact resistance and the fatigue resistance of the concrete are obviously improved, and the ductility is good.
The invention also provides a preparation method of the new sound-absorbing and vibration-insulating concrete material, which comprises the following steps:
(1) weighing the raw materials according to the parts by weight, and dividing water into a first part and a second part;
(2) diluting the foaming agent with first part of water, and preparing foaming agent diluent into foam by using a foaming machine;
(3) adding an air entraining agent, cement, fly ash, ceramsite, rubber particles and fibers into a spiral feeding machine for stirring to prepare an admixture;
(4) and preparing the foam, the admixture and the second part of water into the sound-absorbing vibration-insulating concrete new material by using a pulping and foam mixing machine.
Further, in the step (2), the volume ratio of the foaming agent to the first portion of water is 1:20, and the foaming amount is 0.8m3Min, the foam diameter is 0.1-2 mm.
The adoption of the further beneficial effects is as follows: the foam diameter influences the foam compactness, the smaller the foam diameter is, the finer and more dense the foam is, the better the stability of the foam is, and the higher the strength of the produced product is.
Further, the foaming machine in the step (2) is an MC-600 type foaming machine.
The adoption of the further beneficial effects is as follows: the MC-600 type foaming machine selected by the invention occupies only 0.5m of floor area3The foam has the advantages of light weight, convenient transportation, excellent foaming performance, fine and uniform foam, cloud-like foam, fine foam tightness, uniform foam and good foam bleeding amount.
Further, in the step (3), the stirring time is 2-7min, and the rotating speed of the stirrer is 90-170 r/min; in the step (4), the mixing and soaking time is 3-5 min. The foam-mixing material should be used at any time, and the retention time should not be longer than 30 min.
The invention has the beneficial effects that: the new sound-absorbing vibration-insulating concrete material is superior to sand lime bricks in compressive strength, flexural strength, sound-absorbing performance (sound-absorbing coefficient) and vibration-insulating performance (dynamic elastic modulus) on the basis of reducing density and realizing light weight. Compared with the filling of the mortar brick wall, the novel concrete material greatly improves and enhances the sound absorption and vibration isolation functions under the condition of ensuring a certain compression resistance/bending resistance structure performance, realizes the enhancement of the value coefficient, improves the heat preservation and heat insulation performance by adding the ceramsite into the water and the cementing material, and effectively enhances the vibration resistance and sound absorption functions of the concrete by introducing a certain proportion of rubber particles and fibers.
The invention also provides application of the new sound-absorbing and vibration-insulating concrete material in sound insulation and vibration reduction of subway trains.
The construction method for backfilling the vibration-proof ditch of the sound-absorbing vibration-insulating concrete material comprises the following steps of:
(1) clearing away the garbage built in the anti-vibration ditch and clearing accumulated water, pouring a C15 concrete cushion layer with the thickness of 0.1m on the bottom of the anti-vibration ditch after clearing, and then sticking polyphenyl boards with the height of 3.9m and the thickness of 0.05m on two sides of the anti-vibration ditch as waterproof protective layers;
(2) building a first layer of partition walls in the anti-vibration ditch at equal intervals by adopting lime-sand bricks or common fly ash bricks, wherein the distance between two adjacent partition walls in each layer of partition wall is 30-40m, the thickness of each partition wall is 0.24m, the height of each partition wall is 1-1.5m, and the width of each partition wall is 0.6-1.2m, and sound-absorbing and vibration-isolating concrete materials are poured between the first layer of partition walls in a pumping mode to be as high as the first layer of partition walls;
(3) watering, laminating, moisturizing and maintaining, after the sound-absorbing and vibration-isolating concrete material poured between the first layer of partition walls is solidified and the strength is more than 1.2MPa, building a second layer of partition walls with the same height, width and thickness as the first layer of partition walls, and pouring the sound-absorbing and vibration-isolating concrete material between the second layer of partition walls to the same height as the second layer of partition walls;
(4) continuously building the partition wall, and repeating the operations in the steps (2) to (3) until the vibration-proof ditch is completely filled;
(5) and maintaining, polishing the top surface and removing the mold to prepare for the subsequent pouring of the waterproof layer, the protective layer and the top plate.
The construction method for the anti-vibration ditch backfill is simple and quick in construction, and compared with the inconvenience in construction operation of the lime-sand bricks, the construction method can be used for pouring in a pumping mode directly, and is simple and quick in construction. The cost of the anti-vibration ditch backfill construction method can be saved by more than 10% compared with the original lime-sand brick method per square meter by comprehensively considering the comparison of equipment expenses such as materials, manpower, mortar tanks and the like. Compared with the problem that workers face the risks of high-altitude falling objects such as oxygen deficiency during operation in a narrow space and falling of reinforcing steel bars, aluminum diaphragm plates and shelves at the periphery of a construction building in the lime-sand brick backfilling method, the anti-vibration ditch backfilling construction method is safer and more environment-friendly.
Detailed Description
The present invention will be described in further detail with reference to specific examples, which are provided for illustration only and are not intended to limit the scope of the present invention.
Example 1
(1) Weighing 600kg of cement, 92kg of fly ash, 384.3kg of ceramsite, 184kg of water, 42.7kg of rubber particles, 1.5kg of AES foaming agent, 3.7kg of k12 modified air-entraining agent and 1.2kg of copper fibers, wherein the particle size of the fly ash is 0.5cm, the ceramsite is 20-mesh ceramsite, the particle size of the rubber particles is 1mm, the fibers are copper fibers, the length of the fibers is 3cm, and the water is divided into a first part and a second part;
(2) diluting the foaming agent with first part of water at a volume ratio of 1:20, and preparing the foaming agent diluent into foam with a foaming amount of 0.6m by using an MC-600 type foaming machine3Min, the foam diameter is 0.1-2 mm;
(3) adding an air entraining agent, cement, fly ash, ceramsite, rubber particles and fibers into a spiral feeder to be stirred to prepare an admixture, wherein the stirring time is 2min, and the rotating speed of a stirrer is 90 r/min;
(4) and preparing the foam, the admixture and the second part of water into the new sound-absorbing vibration-insulating concrete material by using a pulping and foam mixing machine, wherein the foam mixing time is 3 min.
Example 2
(1) Weighing 600kg of cement, 92kg of fly ash, 371.49kg of ceramsite, 184kg of water, 55.51kg of rubber particles, 1.5kg of AES foaming agent, 3.7kg of k12 modified air-entraining agent and 1.2kg of copper fibers, wherein the particle size of the fly ash is 0.5cm, the ceramsite is 20-mesh ceramsite, the particle size of the rubber particles is 1mm, the fibers are copper fibers, the length of the fibers is 3cm, and dividing the water into a first part and a second part;
(2) diluting the foaming agent with first part of water at a volume ratio of 1:20, and preparing the foaming agent diluent into foam with a foaming amount of 0.6m by using an MC-600 type foaming machine3Min, the foam diameter is 0.1-2 mm;
(3) adding an air entraining agent, cement, fly ash, ceramsite, rubber particles and fibers into a spiral feeder to be stirred to prepare an admixture, wherein the stirring time is 3min, and the rotating speed of a stirrer is 100 r/min;
(4) and preparing the foam, the admixture and the second part of water into the new sound-absorbing vibration-insulating concrete material by using a pulping and foam mixing machine, wherein the foam mixing time is 3 min.
Example 3
(1) Weighing 600kg of cement, 92kg of fly ash, 363kg of ceramsite, 184kg of water, 64kg of rubber particles, 1.5kg of AES foaming agent, 3.7kg of k12 modified air entraining agent and 1.2kg of copper fibers, wherein the particle size of the fly ash is 0.6cm, the ceramsite is 20-mesh ceramsite, the particle size of the rubber particles is 1mm, the fibers are copper fibers, the length of the fibers is 3cm, and dividing the water into a first part and a second part;
(2) diluting the foaming agent with first part of water at a volume ratio of 1:20, and making the foaming agent diluted solution into foam with a foaming amount of 0.7m by using an MC-600 type foaming machine3Min, the foam diameter is 0.1-2 mm;
(3) adding an air entraining agent, cement, fly ash, ceramsite, rubber particles and fibers into a spiral feeding machine for stirring to prepare an admixture, wherein the stirring time is 4min, and the rotating speed of a stirrer is 110 r/min;
(4) and preparing the foam, the admixture and the second part of water into the new sound-absorbing vibration-insulating concrete material by using a pulping and foam mixing machine, wherein the foam mixing time is 4 min.
Example 4
(1) Weighing 600kg of cement, 92kg of fly ash, 350.14kg of ceramsite, 184kg of water, 88kg of rubber particles, 1.5kg of AES foaming agent, 3.7kg of k12 modified air entraining agent and 1.2kg of copper fibers, wherein the particle size of the fly ash is 0.7cm, the ceramsite is 30-mesh ceramsite, the particle size of the rubber particles is 2mm, the fibers are copper fibers, the length of the fibers is 4cm, and the water is divided into a first part and a second part;
(2) diluting the foaming agent with first part of water at a volume ratio of 1:20, and preparing the foaming agent diluent into foam with a foaming amount of 0.8m by using an MC-600 type foaming machine3Min, the foam diameter is 0.1-2 mm;
(3) adding an air entraining agent, cement, fly ash, ceramsite, rubber particles and fibers into a spiral feeding machine for stirring to prepare an admixture, wherein the stirring time is 4min, and the rotating speed of a stirrer is 120 r/min;
(4) and preparing the foam, the admixture and the second part of water into the new sound-absorbing vibration-insulating concrete material by using a pulping and foam mixing machine, wherein the foam mixing time is 5 min.
Example 5
(1) Weighing 600kg of cement, 92kg of fly ash, 328.79kg of ceramsite, 184kg of water, 98.21kg of rubber particles, 1.5kg of AES foaming agent, 3.7kg of k12 modified air entraining agent and 1.2kg of copper fibers, wherein the particle size of the fly ash is 1cm, the ceramsite is 30-mesh ceramsite, the particle size of the rubber particles is 3mm, the fibers are copper fibers, the length of the fibers is 5cm, and dividing the water into a first part and a second part;
(2) diluting the foaming agent with first part of water at a volume ratio of 1:20, and preparing the foaming agent diluent into foam with a foaming amount of 0.8m by using an MC-600 type foaming machine3Min, the foam diameter is 0.1-2 mm;
(3) adding the air entraining agent, the cement, the fly ash, the ceramsite, the rubber particles and the fibers into a spiral feeding machine for stirring to prepare an admixture, wherein the stirring time is 6min, and the rotating speed of a stirrer is 130 r/min;
(4) and preparing the foam, the admixture and the second part of water into the new sound-absorbing vibration-insulating concrete material by using a pulping and foam mixing machine, wherein the foam mixing time is 5 min.
Example 6
(1) 590kg of cement, 90kg of fly ash, 320kg of ceramsite, 180kg of water, 40kg of rubber particles, 1kg of AES foaming agent, 3kg of k12 modified air entraining agent and 1kg of copper fibers are weighed, the particle size of the fly ash is 0.8cm, the ceramsite is 30-mesh ceramsite, the particle size of the rubber particles is 3mm, the fibers are copper fibers, the length of the fibers is 5cm, and the water is divided into a first part and a second part;
(2) diluting the foaming agent with first part of water at a volume ratio of 1:20, and preparing the foaming agent diluent into foam with a foaming amount of 0.8m by using an MC-600 type foaming machine3Min, the foam diameter is 0.1-2 mm;
(3) adding the air entraining agent, the cement, the fly ash, the ceramsite, the rubber particles and the fibers into a spiral feeding machine for stirring to prepare an admixture, wherein the stirring time is 7min, and the rotating speed of a stirrer is 160 r/min;
(4) and preparing the foam, the admixture and the second part of water into the new sound-absorbing vibration-insulating concrete material by using a pulping and foam mixing machine, wherein the foam mixing time is 5 min.
Example 7
(1) Weighing 610kg of cement, 95kg of fly ash, 370kg of ceramsite, 190kg of water, 100kg of rubber particles, 2kg of AES foaming agent, 4kg of k12 modified air entraining agent and 1.5kg of copper fibers, wherein the particle size of the fly ash is 0.5-1cm, the ceramsite is 20-30 meshes of ceramsite, the particle size of the rubber particles is 1-3mm, the fibers are copper fibers, the length of the fibers is 3-5cm, and the water is divided into a first part and a second part;
(2) diluting the foaming agent with first part of water at a volume ratio of 1:20, and preparing the foaming agent diluent into foam with a foaming amount of 0.8m by using an MC-600 type foaming machine3Min, the foam diameter is 0.1-2 mm;
(3) adding an air entraining agent, cement, fly ash, ceramsite, rubber particles and fibers into a spiral feeder to be stirred to prepare an admixture, wherein the stirring time is 5min, and the rotating speed of a stirrer is 150 r/min;
(4) and preparing the foam, the admixture and the second part of water into the new sound-absorbing vibration-insulating concrete material by using a pulping and foam mixing machine, wherein the foam mixing time is 4 min.
Example 8
In the future scientific urban area of Chang plain area of Beijing City, the total construction area of the project is 540,000m2The building consists of 7 tower buildings, matched skirt houses and underground rooms, wherein the highest 33 floors of the tower buildings are 150m in building height; the highest 6 layers of the skirt houses,building height 34.8 m; underground 4 layers. The tower is of a mixed structure frame-core tube structure, the skirt building is of a frame-shear wall structure, steel galleries of sky city are designed between the tower buildings, four layers and three layers of underground penetrate through No. 17 Beijing subway lines and are integrally constructed with a future subway science and technology city station, the joint part of the underground garage and the subway structure adopts a double-wall structure form, the horizontal structure is constructed together, the vertical structure is not constructed together, the thickness of the outer wall of the subway structure is 900mm, the thickness of the wall body of the underground garage structure is 700mm, anti-vibration grooves are arranged between the double walls and are positioned on two sides of the joint part of the four layers of the B5 skirt building underground and the subway, the width of the anti-vibration grooves is 1.1m, the depth of the anti-vibration grooves is 4m, and the length.
(1) Weighing 600kg of cement, 92kg of fly ash, 364.4kg of ceramsite, 184kg of water, 80kg of rubber particles, 1.5kg of AES foaming agent, 3.7kg of k12 modified air entraining agent and 1.2kg of fiber, and dividing the water into a first part and a second part;
(2) diluting the foaming agent with first part of water at a volume ratio of 1:20, and preparing the foaming agent diluent into foam with a foaming amount of 0.8m by using an MC-600 type foaming machine3Min, the foam diameter is 0.1-2 mm;
(3) adding an air entraining agent, cement, fly ash, ceramsite, rubber particles and fibers into a spiral feeder to be stirred to prepare an admixture, wherein the stirring time is 5min, and the rotating speed of a stirrer is 150 r/min;
(4) and preparing the foam, the admixture and the second part of water into the new sound-absorbing vibration-insulating concrete material by using a pulping and foam mixing machine, wherein the foam mixing time is 5 min.
The construction method for backfilling the vibration-proof ditch of the sound-absorbing vibration-insulating concrete material comprises the following steps of:
(1) clearing away the garbage built in the anti-vibration ditch and clearing accumulated water, pouring a C15 concrete cushion layer with the thickness of 0.1m on the bottom of the anti-vibration ditch after clearing, and then sticking polyphenyl boards with the height of 3.9m and the thickness of 0.05m on two sides of the anti-vibration ditch as waterproof protective layers;
(2) building a first layer of partition walls in the anti-vibration ditch at equal intervals by adopting lime-sand bricks, wherein the distance between two adjacent partition walls in each layer of partition wall is 40m, the thickness of each partition wall is 0.24m, the height of each partition wall is 1.3m, the width of each partition wall is 1.1m, and sound-absorbing vibration-insulating concrete materials are poured between the first layer of partition walls in a pumping mode until the height of each partition wall is equal to that of the first layer of partition wall;
(3) watering, laminating, moisturizing and maintaining, after the sound-absorbing and vibration-isolating concrete material poured between the first layer of partition walls is solidified and the strength is more than 1.2MPa, building a second layer of partition walls with the same height, width and thickness as the first layer of partition walls, and pouring the sound-absorbing and vibration-isolating concrete material between the second layer of partition walls to the same height as the second layer of partition walls;
(4) continuously building the partition wall, and repeating the operations in the steps (2) to (3) until the vibration-proof ditch is completely filled;
(5) and maintaining, polishing the top surface and removing the mold to prepare for the subsequent pouring of the waterproof layer, the protective layer and the top plate.
The construction method for the anti-vibration ditch backfill is simple and quick in construction, can be directly poured by adopting a pumping mode, is simple and quick in construction, comprehensively considers the comparison of equipment expenses of materials, manpower, mortar tanks and the like, can save the cost by more than 10 percent per square meter compared with the original method for the mortar bricks, and is safer and more environment-friendly compared with the method for the anti-vibration ditch backfill, wherein workers can face the risk problems of operation lack of oxygen in a narrow space and high falling risks such as steel bars, aluminum membrane plates and frames which can fall on the periphery of a construction building in the process of constructing the mortar bricks.
Effect test
Aiming at the performance comparison of the sound-absorbing vibration-insulating concrete new material and the lime-sand brick in the embodiment 8, a national building engineering quality supervision and inspection center is entrusted to carry out a complete comparison test, the comparison of all parameters is shown in a table 1-2, the density in the table is the data of the lime-sand brick comparison sound-absorbing vibration-insulating concrete, the compression strength, the bending strength, the dynamic elastic modulus and the sound-absorbing coefficient are the data of the lime-sand brick wall comparison sound-absorbing vibration-insulating concrete wall in a vibration-proof ditch in combination with the engineering practice, and the influence of the building mortar on the dynamic elastic modulus of the lime-sand brick wall is considered to be small and the influence of the strength is large, so that the compression strength and the bending strength of the lime-sand brick wall are directly corrected by adopting the data in the test report except.
Wherein the compression strength and the bending strength of the lime-sand brick wall are as follows: by combining the test data and referring to tables 3.2.1-3 and 3.2.2 of masonry structure design Specification, the compressive strength of the MU15 autoclaved sand-lime brick and the MU5 common mortar is 1.83MPa, and the flexural strength is 0.08MPa (the bending tensile strength along the through joint strength).
TABLE 1 mortar brick (wall) Performance parameters
TABLE 2 EXAMPLE 8 Performance parameters of New Sound-absorbing and vibration-insulating concrete Material
Lime sand brick (wall): when the noise reduction coefficient NRC and the sound absorption coefficient are detected, a layer of sand-lime brick is tiled on the ground, cement mortar is used for leveling the surface, the area is 10.7 square meters, and the reverberation time measuring method comprises the following steps: the interrupted sound source method. The results of the sound absorption coefficient measurement are shown in Table 3, and the noise reduction coefficient NRC is 0.00.
TABLE 3 result of testing sound absorption coefficient of sand-lime brick (wall)
Sound-absorbing vibration-insulating concrete (wall): when detecting the noise reduction coefficient NRC and the sound absorption coefficient, placing a sample to be detected on the ground, wherein the area is 10.8 square meters, the periphery of the test piece is plugged by using solid bricks and cement mortar, and the reverberation time measuring method comprises the following steps: the interrupted sound source method. The sound absorption coefficient detection results are shown in table 4, and the noise reduction coefficient NRC is 0.15.
TABLE 4 detection result of sound absorption coefficient of sound absorption and vibration insulation concrete (wall)
The effect experiment proves that the new sound-absorbing and vibration-isolating concrete material is superior to the lime-sand brick in compressive strength, flexural strength, sound-absorbing performance (sound-absorbing coefficient) and vibration-isolating performance (dynamic elastic modulus) on the basis of reducing density and realizing light weight. Compared with the filling of a lime-sand brick wall, the novel concrete material greatly improves and enhances the sound absorption and vibration isolation functions under the condition of ensuring certain compression resistance/bending resistance structural performance, realizes the improvement of the value coefficient, improves the heat preservation and heat insulation performance by adding the ceramsite into water and a cementing material, introduces a certain proportion of rubber particles and fibers, and effectively enhances the vibration resistance and sound absorption functions of concrete.
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, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The new sound-absorbing and vibration-insulating concrete material is characterized by being prepared from the following raw materials, by weight, 590-590 parts of cement, 90-95 parts of fly ash, 390 parts of ceramsite 320, 190 parts of water 180, 40-100 parts of rubber particles, 1-2 parts of foaming agent, 3-4 parts of air entraining agent and 1-1.5 parts of fibers.
2. The new sound-absorbing and vibration-insulating concrete material as claimed in claim 1, which is prepared from (by weight parts) cement 600, fly ash 92, ceramsite 364.4, water 184, rubber particles 80, foaming agent 1.5, air-entraining agent 3.7, and fiber 1.2.
3. The new material for sound-absorbing and vibration-insulating concrete according to claim 1 or 2, wherein the foam in the new material for sound-absorbing and vibration-insulating concrete accounts for 20% of the total volume of the new material for sound-absorbing and vibration-insulating concrete.
4. The new material for sound-absorbing and vibration-insulating concrete as claimed in claim 1, wherein said rubber particles account for 18% of the total weight of said ceramsite and said rubber particles.
5. The new material for sound-absorbing and vibration-insulating concrete as claimed in claim 1, wherein said fly ash has a particle size of 0.5-1cm, said ceramsite is 20-30 mesh ceramsite, and said rubber particle has a particle size of 1-3 mm.
6. The new material for sound-absorbing and vibration-insulating concrete according to claim 1, wherein said foaming agent is AES foaming agent; the air-entraining agent is a k12 modified air-entraining agent; the fiber is copper fiber, and the length is 3-5 cm.
7. The preparation method of the new sound-absorbing vibration-insulating concrete material is characterized by comprising the following steps of:
(1) weighing the raw materials according to any one of the claims 1 to 6 in parts by weight, and dividing water into a first part and a second part;
(2) diluting the foaming agent with first part of water, and preparing foaming agent diluent into foam by using a foaming machine;
(3) adding an air entraining agent, cement, fly ash, ceramsite, rubber particles and fibers into a spiral feeding machine, and stirring to prepare an admixture;
(4) and preparing the foam, the admixture and the second part of water into the new sound-absorbing vibration-insulating concrete material by using a pulping and foam mixing machine.
8. The method for preparing a new material for sound-absorbing and vibration-insulating concrete according to claim 1, wherein the volume ratio of the foaming agent to the first portion of water in the step (2) is 1:20, and the foaming amount is 0.6-0.8m3Min, the foam diameter is 0.1-2 mm.
9. The method for preparing a new material for sound-absorbing and vibration-insulating concrete according to claim 1, wherein in the step (3), the stirring time is 2-7min, and the rotating speed of the stirrer is 90-170 r/min; in the step (4), the mixing and soaking time is 3-5 min.
10. The application of a new sound-absorbing and vibration-insulating concrete material in sound insulation and vibration reduction of subway trains.
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