CN114890741A - Low-carbon self-leveling lightweight concrete and preparation method and construction method thereof - Google Patents
Low-carbon self-leveling lightweight concrete and preparation method and construction method thereof Download PDFInfo
- Publication number
- CN114890741A CN114890741A CN202210510134.2A CN202210510134A CN114890741A CN 114890741 A CN114890741 A CN 114890741A CN 202210510134 A CN202210510134 A CN 202210510134A CN 114890741 A CN114890741 A CN 114890741A
- Authority
- CN
- China
- Prior art keywords
- leveling
- low
- lightweight concrete
- carbon self
- concrete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 94
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 65
- 238000010276 construction Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000000843 powder Substances 0.000 claims abstract description 30
- 239000004088 foaming agent Substances 0.000 claims abstract description 27
- 239000004568 cement Substances 0.000 claims abstract description 23
- 239000010881 fly ash Substances 0.000 claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 18
- 239000011707 mineral Substances 0.000 claims abstract description 18
- 239000004576 sand Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000002699 waste material Substances 0.000 claims abstract description 12
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 10
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000011449 brick Substances 0.000 claims abstract description 7
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000010931 gold Substances 0.000 claims abstract description 6
- 229910052737 gold Inorganic materials 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 21
- 239000002253 acid Substances 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims description 11
- 239000002956 ash Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000011083 cement mortar Substances 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 4
- 238000007790 scraping Methods 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 108010064851 Plant Proteins Proteins 0.000 claims description 2
- 239000011398 Portland cement Substances 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 235000021120 animal protein Nutrition 0.000 claims description 2
- 235000021118 plant-derived protein Nutrition 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 230000001172 regenerating effect Effects 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 3
- 239000002023 wood Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000011381 foam concrete Substances 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/10—Devices for levelling, e.g. templates or boards
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- 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
- C04B2111/40—Porous or lightweight materials
-
- 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
- C04B2111/60—Flooring materials
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a concrete formula and a construction method, in particular to low-carbon self-leveling lightweight concrete and a preparation method and a construction method thereof. The low-carbon self-leveling lightweight concrete comprises water, cement, mineral powder, fly ash, recycled fine aggregate, a water reducing agent and a foaming agent, wherein the recycled fine aggregate is prepared by crushing at least one of waste brick powder, waste aerated block powder, iron tailing sand and gold tailing sand and has a particle size of not more than 3 mm. The invention forms a novel incombustible building energy-saving material by introducing tiny closed bubbles into concrete, and the material has excellent mechanical property, thermal insulation property and cracking resistance, can reduce construction procedures, reduce material cost and reduce hollowing.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to low-carbon self-leveling lightweight concrete and a preparation method and a construction method thereof.
Background
At present, the leveling of the indoor ground before the wood floor is paved generally adopts a method of filling the ground with cement mortar and then adopting self-leveling cement to level, the process is more, hollowing is easy to generate, and if only the self-leveling cement leveling technology is adopted, the problems of large leveling thickness, easy cracking and sanding, high cost and the like exist, and the current requirements are difficult to meet.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a low-carbon self-leveling lightweight concrete and a preparation method and a construction method thereof.
On the one hand, the application provides a low carbon self-leveling lightweight concrete, and the technical scheme is as follows:
the low-carbon self-leveling light concrete includes water, cement, mineral powder, flyash, regenerated fine aggregate, water reducing agent and foaming agent.
Preferably, the water: cement: mineral powder: fly ash: regenerating fine aggregate: water reducing agent: the mass ratio of the foaming agent is (200-350): (300-500): (100-200): 150-250): 500-700): 10-20): (1-2).
Preferably, the cement is P.O42.5 portland cement, the recycled fine aggregate is at least one selected from waste brick powder, waste aerated brick powder, iron tailing sand and gold tailing sand, the fly ash is selected from fly ash with three or more levels, the water reducing agent is polycarboxylic acid, and the foaming agent is a plant protein foaming agent or an animal protein foaming agent.
Preferably, the particle size of the recycled fine aggregate is not more than 3 mm.
On the other hand, the application provides a preparation method of the low-carbon self-leveling lightweight concrete, which comprises the following steps:
step 1, putting water, cement, mineral powder, fly ash, recycled fine aggregate and a water reducing agent into a stirring machine, stirring and mixing uniformly, wherein the stirring time is 30-45s per disc;
step 2, loading the uniformly mixed mixture into a transport tank car, wherein the rotating speed of a stirring tank of the transport tank car is not lower than 8r/min when the stirring tank receives the materials, the rotating speed of the stirring tank keeps 3-6r/min in the transport process, and the time from material receiving to material discharging of the transport tank car is not more than the initial setting time of the concrete;
and 3, transporting the concrete to a construction site by using a transport tank car, then unloading to pumping equipment, adding a foaming agent, and fully mixing the concrete and the foaming agent to obtain the low-carbon self-leveling lightweight concrete.
Generally, the stirring machine needs to be loaded, stirred and unloaded for multiple times to fill up a transport tank truck, and the stirring time per tray in the step 1 is 30-45s, namely 30-45s per stirring time.
Preferably, the fluidity of the low-carbon self-leveling lightweight concrete is not less than 250 mm.
Preferably, the strength of the low-carbon self-leveling lightweight concrete is not lower than 10 MPa.
Preferably, the wet volume weight of the low-carbon self-leveling lightweight concrete is not less than 1600kg/m 3 And the water absorption rate is not more than 15%.
Preferably, the foam diameter of the low-carbon self-leveling lightweight concrete is controlled to be 0.5-2 mm, the concrete foam with the diameter within the range is more uniform, the prepared concrete has more stable quality, and the sound insulation and heat preservation performance is also better.
On the other hand, the application provides a construction method of the low-carbon self-leveling lightweight concrete, and the technical scheme is as follows:
a construction process of low-carbon self-leveling lightweight concrete comprises the following steps:
s1, cleaning the ground base layer;
s2, finding the height and the pull line: all the thicknesses of the cushions to be reserved in the concrete pouring area need to be consistent, elevation control points of positive and negative zeros are determined according to the designed elevation, and elevation lines are marked on the peripheral wall surfaces and the columns;
s3, preparing an ash cake, and making ribs: manufacturing ash cakes according to the determined thickness of the cushion layer, carrying out gridding arrangement on the manufactured ash cakes in a pouring area, and arranging three punching ribs in total on two sides and the middle of the pouring area in the length direction;
s4, manufacturing a blocking table: at the boundary of a pouring area without wall body blocking, such as a room door, a blocking platform is manufactured by using M15 cement mortar, the top of the blocking platform is consistent with the ground, and the blocking platform is not dismantled at the later stage;
s5, pouring low-carbon self-leveling lightweight concrete into the indoor ground through the guide pipe: connecting a ground pump steel pipe into a building, connecting the ground pump steel pipe into an area needing pouring by sections by using a hose, and continuously pouring from one end;
s6, controlling the elevation: using an aluminum alloy scraping bar to carry out vibration scraping along with the position of the punching rib;
s7, leveling, and eliminating large bubbles: the toothed roller rolls vertically and horizontally on the low-carbon self-leveling light concrete to eliminate large bubbles and avoid hollowing; after the low-carbon self-leveling lightweight concrete is initially set, an iron trowel or an electric trowel is used for trowelling and pressing, the surface evenness is controlled, and the low-carbon self-leveling lightweight concrete is polished and finished by a concrete finishing machine before final setting;
s8, maintenance: covering and watering curing are carried out on the poured low-carbon self-leveling lightweight concrete within 11-13h, the interval time of watering curing every two times is not more than 12h, and the total curing time is not less than 7 days and nights.
Compared with the prior art, the invention has the beneficial effects that:
1. the low-carbon self-leveling lightweight concrete provided by the invention adopts crushed wastes such as brick powder, aerated block powder, iron tailing sand, gold tailing sand and the like as fine aggregates, and also adopts fly ash which belongs to low-carbon raw materials, so that the cost of the raw materials is saved, the secondary utilization of the wastes is promoted, the environmental pollution is reduced, and natural resources are saved.
2. The low-carbon self-leveling lightweight concrete prepared by the preparation method of the low-carbon self-leveling lightweight concrete provided by the invention has small volume weight, and foam loss in the concrete can be reduced by on-site foaming, so that the stability of the density of the concrete is ensured. Because pores exist in the foamed concrete, the foamed concrete can obstruct the transmission of sound and vibration and has good heat insulation performance.
3. The construction method of the low-carbon self-leveling light concrete provided by the invention creates a brand new construction method, reduces the construction process of fine aggregate concrete leveling during construction, has the construction effect which is comparable to the construction effect of the two processes of fine aggregate concrete leveling and self-leveling cement leveling at present, reduces the hollowing probability of the leveling layer before wood floors are paved, is simple to operate, has the characteristics of high flatness, good heat insulation performance, low cost and the like, and effectively ensures the construction quality of indoor ground.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the attached tables in the 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.
Example 1
The embodiment provides a low-carbon self-leveling lightweight concrete which comprises the following components in parts by mass:
water: 260 parts of (B); cement: 380 parts; mineral powder: 140 parts of (B); fly ash: 200 parts of (A); waste brick powder: 670 parts of; polycarboxylic acid: 11.5 parts; plant foaming agent: 1 part.
The low-carbon self-leveling lightweight concrete provided by the embodiment is prepared by the following method, comprising the following steps,
step 1, weighing each component of the low-carbon self-leveling lightweight concrete according to mass fraction for later use;
step 2, putting water, cement, mineral powder, fly ash, recycled fine aggregate and a water reducing agent into a stirring machine, stirring and mixing uniformly, wherein the stirring time is 30-45s per disc;
step 3, loading the uniformly mixed mixture into a transport tank car, wherein the rotating speed of a stirring tank of the transport tank car is not lower than 8r/min when the stirring tank receives the materials, the rotating speed of the stirring tank keeps 3-6r/min in slow rotation during the transport process, and the time from material receiving to material discharging of the transport tank car is not more than the initial setting time of the concrete;
and 4, transporting the concrete to a construction site by using a transport tank car, then unloading to pumping equipment, adding a foaming agent, and fully mixing the concrete and the foaming agent to obtain the low-carbon self-leveling lightweight concrete.
Example 2
The embodiment provides a low-carbon self-leveling lightweight concrete which comprises the following components in parts by mass:
water: 260 parts of (B); cement: 400 parts of (1); mineral powder: 120 parts of (A); fly ash: 200 parts of (A); waste brick powder: 670 parts of; polycarboxylic acid: 12 parts of (1); animal foaming agent: 1 part.
The preparation method of this example is the same as that of example 1.
Example 3
The embodiment provides a low-carbon self-leveling lightweight concrete which comprises the following components in parts by mass:
water: 280 parts of (B); cement: 380 parts; mineral powder: 140 parts of (B); fly ash: 200 parts of (A); waste building block powder: 650 parts of (B); polycarboxylic acid: 11.5 parts; plant foaming agent: 1 part.
The preparation method of this example is the same as that of example 1.
Example 4
The embodiment provides a low-carbon self-leveling lightweight concrete which comprises the following components in parts by mass:
water: 280 parts of (B); cement: 400 parts of (1); mineral powder: 120 parts of (A); fly ash: 200 parts of (A); waste building block powder: 650 parts of (B); polycarboxylic acid: 12 parts of (1); animal foaming agent: 1 part.
The preparation method of this example is the same as that of example 1.
Example 5
The embodiment provides a low-carbon self-leveling lightweight concrete which comprises the following components in parts by mass:
water: 300 parts of (A); cement: 380 parts; mineral powder: 140 parts of (B); fly ash: 200 parts of (A); iron tailing sand: 630 parts of; polycarboxylic acid: 11.5 parts; plant foaming agent: 1 part.
The preparation method of this example is the same as that of example 1.
Example 6
The embodiment provides a low-carbon self-leveling lightweight concrete which comprises the following components in parts by mass:
water: 280 parts of (B); cement: 400 parts of (1); mineral powder: 120 parts of (A); fly ash: 200 parts of (A); iron tailing sand: 650 parts of (B); polycarboxylic acid: 12 parts of (1); animal foaming agent: 1 part.
The preparation method of this example is the same as that of example 1.
Example 7
The embodiment provides a low-carbon self-leveling lightweight concrete which comprises the following components in parts by mass:
water: 350 parts of (a); cement: 500 parts; mineral powder: 100 parts of (A); fly ash: 150 parts; gold tailings sand: 500 parts; polycarboxylic acid: 12 parts of (1); animal foaming agent: 1 part.
The preparation method of this example is the same as that of example 1.
Example 8
The embodiment provides a low-carbon self-leveling lightweight concrete which comprises the following components in parts by mass:
water: 200 parts of (A); cement: 300 parts of (A); mineral powder: 200 parts of (A); fly ash: 250 parts of (A); gold tailings sand: 700 parts of (1); polycarboxylic acid: 12 parts of (1); animal foaming agent: 1 part.
The preparation method of this example is the same as that of example 1.
The ratio of each component in the recycled aggregate in examples 1-8 has little influence on the performance of the low-carbon self-leveling lightweight concrete.
Control group 1
The lightweight concrete provided by the embodiment comprises the following components in parts by mass:
water: 280 parts of (a); cement: 400 parts of (1); mineral powder: 120 parts of (A); fly ash: 200 parts of (a); river sand: 650 parts of (B); polycarboxylic acid: 12 parts of (a); the plant foaming agent comprises the following components: 1 part.
The control was prepared in the same manner as in example 1.
Control group 2
The lightweight concrete provided by the embodiment comprises the following components in parts by mass:
water: 300 parts of (A); cement: 380 parts; mineral powder: 140 parts of (B); fly ash: 200 parts of (A); river sand: 630 parts of; polycarboxylic acid: 11.5 parts; animal foaming agent: 1 part.
The control was prepared in the same manner as in example 1.
According to the lightweight concrete provided by the embodiments 1-6 and the comparison groups 1-2, the following construction method is adopted for construction, and the construction method specifically comprises the following steps:
s1, cleaning the ground base layer, wherein sundries on the surface of the base layer are cleaned, the surface of the base layer is wet, but water accumulation cannot occur;
s2, finding the height and the pull line: all the thicknesses of the cushions to be reserved in the concrete pouring area need to be consistent, elevation control points of positive and negative zeros are determined according to the designed elevation, and elevation lines are marked on the peripheral wall surfaces and the columns;
s3, preparing an ash cake, and making ribs: manufacturing ash cakes according to the determined thickness of the cushion layer, wherein the ash cakes are fine stone concrete blocks with the length of 150mm and the width of 150mm, carrying out gridding arrangement on the manufactured ash cakes in a pouring area at intervals of 2 meters, and arranging three punching ribs in total at two sides and the middle of the pouring area in the length direction so as to ensure that a post hanging bar can be flattened at one time;
s4, manufacturing a blocking table: at the boundary without the wall body blocking in the pouring area, such as a room door, the M15 cement mortar is used for manufacturing the baffle table, the top of the baffle table is consistent with the ground, the baffle table is not detached any more in the later period, the M15 cement mortar is mixed on site, the use requirement of the baffle table manufacturing can be met, and the use is convenient;
s5, pouring low-carbon self-leveling lightweight concrete into the indoor ground through the guide pipe: connecting a ground pump steel pipe into a building, connecting the ground pump steel pipe into an area needing pouring by sections by using a hose, and continuously pouring from one end;
s6, controlling the elevation: using an aluminum alloy scraping bar to vibrate and scrape along with the position of the punching rib;
s7, leveling, and eliminating large bubbles: the large air bubbles are eliminated by rolling vertically and horizontally on the low-carbon self-leveling light concrete by using a roller with teeth, so that hollowing is avoided; after the low-carbon self-leveling lightweight concrete is initially set, an iron trowel or an electric trowel is used for troweling, wherein pits and sand holes need to be filled and trowelled by a wood trowel firstly and then are trowelled by the iron trowel, the paving thickness and the surface flatness are strictly controlled, and the low-carbon self-leveling lightweight concrete is polished and smoothed by a concrete smoothing machine before final setting;
s8, maintenance: covering and watering curing are carried out on the poured low-carbon self-leveling lightweight concrete within 11-13h, the interval time of watering curing every two times is not more than 12h, the total curing time is not less than 7 days and nights, closed curing is carried out, and the room is forbidden to enter during the curing period.
After complete solidification, the lightweight concrete was tested and the test performance is shown in table 1.
TABLE 1 Performance index parameters of the concretes prepared in the examples
The experimental data in table 1 are combined to give: compared with the low-carbon self-leveling lightweight concrete prepared in other embodiments, the low-carbon self-leveling lightweight concrete prepared in example 4 has the advantages of high strength, good foaming performance, high volume weight, good fluidity, difficulty in cracking, convenience in construction and the like, and has performance equivalent to that of a control group.
The above is a preferred embodiment of the present invention, and the scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The low-carbon self-leveling lightweight concrete is characterized in that: comprises water, cement, mineral powder, fly ash, recycled fine aggregate, a water reducing agent and a foaming agent.
2. The low-carbon self-leveling lightweight concrete according to claim 1, wherein: the water: cement: mineral powder: fly ash: regenerating fine aggregate: water reducing agent: the mass ratio of the foaming agent is (200-350): (300-500): (100-200): 150-250): 500-700): 10-20): (1-2).
3. The low-carbon self-leveling lightweight concrete according to claim 1, wherein: the cement is P.O42.5 Portland cement, the recycled fine aggregate is at least one of waste brick powder, waste aerated block powder, iron tailing sand and gold tailing sand, the fly ash is selected from three-grade or above fly ash, the water reducing agent is polycarboxylic acid, and the foaming agent is a plant protein foaming agent or an animal protein foaming agent.
4. A low carbon self-leveling lightweight concrete according to claim 1 or 3, wherein: the particle size of the recycled fine aggregate is not more than 3 mm.
5. The preparation method of the low-carbon self-leveling lightweight concrete is characterized by comprising the following steps of:
step 1, putting water, cement, mineral powder, fly ash, recycled fine aggregate and a water reducing agent into a stirring machine, stirring and mixing uniformly, wherein the stirring time is 30-45s per disc;
step 2, loading the uniformly mixed mixture into a transport tank car, wherein the rotating speed of a stirring tank of the transport tank car is not lower than 8r/min when the stirring tank receives the materials, the rotating speed of the stirring tank keeps 3-6r/min in the transport process, and the time from material receiving to material discharging of the transport tank car is not more than the initial setting time of the concrete;
and 3, transporting the concrete to a construction site by using a transport tank car, then unloading to pumping equipment, adding a foaming agent, and fully mixing the concrete and the foaming agent to obtain the low-carbon self-leveling lightweight concrete.
6. The preparation method of the low-carbon self-leveling lightweight concrete according to claim 5, characterized by comprising the following steps: the fluidity of the low-carbon self-leveling lightweight concrete is not less than 250 mm.
7. The preparation method of the low-carbon self-leveling lightweight concrete according to claim 5, characterized by comprising the following steps: the strength of the low-carbon self-leveling lightweight concrete is not lower than 10 MPa.
8. The preparation method of the low-carbon self-leveling lightweight concrete according to claim 5, characterized by comprising the following steps: the wet volume weight of the low-carbon self-leveling lightweight concrete is not less than 1600kg/m 3 And the water absorption rate is not more than 15%.
9. The preparation method of the low-carbon self-leveling lightweight concrete according to claim 5, characterized by comprising the following steps: the foam diameter of the low-carbon self-leveling lightweight concrete is controlled to be 0.5-2 mm.
10. The construction method of the low-carbon self-leveling lightweight concrete is characterized by comprising the following steps of:
s1, cleaning the ground base layer;
s2, finding the height and the pull line: all the thicknesses of the cushions to be reserved in the concrete pouring area need to be consistent, elevation control points of positive and negative zeros are determined according to the designed elevation, and elevation lines are marked on the peripheral wall surfaces and the columns;
s3, preparing an ash cake, and making ribs: manufacturing ash cakes according to the determined thickness of the cushion layer, carrying out gridding arrangement on the manufactured ash cakes in a pouring area, and arranging three punching ribs in total on two sides and the middle of the pouring area in the length direction;
s4, manufacturing a blocking table: at the boundary of the pouring area without the wall body barrier, M15 cement mortar is used for manufacturing a blocking platform, the top of the blocking platform is consistent with the ground, and the blocking platform is not removed at the later stage;
s5, pouring low-carbon self-leveling lightweight concrete into the indoor ground through the guide pipe: connecting a ground pump steel pipe into a building, connecting the ground pump steel pipe into an area needing pouring by sections by using a hose, and continuously pouring from one end;
s6, controlling the elevation: using an aluminum alloy scraping bar to vibrate and scrape along with the position of the punching rib;
s7, leveling, and eliminating large bubbles: the large air bubbles are eliminated by rolling vertically and horizontally on the low-carbon self-leveling light concrete by using a roller with teeth, so that hollowing is avoided; after the low-carbon self-leveling lightweight concrete is initially set, an iron trowel or an electric trowel is used for trowelling and pressing, the surface evenness is controlled, and the low-carbon self-leveling lightweight concrete is polished and finished by a concrete finishing machine before final setting;
s8, maintenance: covering and watering curing are carried out on the poured low-carbon self-leveling lightweight concrete within 11-13h, the interval time of watering curing every two times is not more than 12h, and the total curing time is not less than 7 days and nights.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210510134.2A CN114890741A (en) | 2022-05-11 | 2022-05-11 | Low-carbon self-leveling lightweight concrete and preparation method and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210510134.2A CN114890741A (en) | 2022-05-11 | 2022-05-11 | Low-carbon self-leveling lightweight concrete and preparation method and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114890741A true CN114890741A (en) | 2022-08-12 |
Family
ID=82720731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210510134.2A Pending CN114890741A (en) | 2022-05-11 | 2022-05-11 | Low-carbon self-leveling lightweight concrete and preparation method and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114890741A (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103121819A (en) * | 2013-03-05 | 2013-05-29 | 北京新奥混凝土集团有限公司 | C30 self-compacting concrete prepared from recycled aggregate and preparation method thereof |
| CN103130464A (en) * | 2013-03-05 | 2013-06-05 | 北京新奥混凝土集团有限公司 | C25 self-compaction concrete prepared from recycled aggregate and preparation method thereof |
| CN103130473A (en) * | 2013-03-05 | 2013-06-05 | 北京新奥混凝土集团有限公司 | C20 self-compaction concrete prepared from recycled aggregate and preparation method thereof |
| JP2013170436A (en) * | 2012-02-22 | 2013-09-02 | Ube Ind Ltd | Method for constructing concrete floor structure |
| CN104788054A (en) * | 2015-04-10 | 2015-07-22 | 浙江大学宁波理工学院 | Eco-friendly self-compacting concrete prepared through complete recycling of waste concrete |
| CN104944863A (en) * | 2015-06-12 | 2015-09-30 | 中建商品混凝土西安有限公司 | Preparation method for high-strength self-compacting concrete with recycled fine aggregate |
| CN106220078A (en) * | 2016-07-08 | 2016-12-14 | 深圳广田集团股份有限公司 | A kind of mixed earth of lightweight self-compaction regeneration and preparation method thereof |
| CN106699057A (en) * | 2016-12-20 | 2017-05-24 | 桐乡市钟大建材有限公司 | Wood-grain-colored ecological self-compacted concrete material |
| CN108275936A (en) * | 2017-12-29 | 2018-07-13 | 上海国砼环保设备有限公司 | A kind of regeneration emery dust green concrete and preparation method thereof |
| CN109838047A (en) * | 2019-02-26 | 2019-06-04 | 青岛海川建设集团有限公司 | The composite foamed slurry construction of ZR |
| JP2019172536A (en) * | 2018-03-29 | 2019-10-10 | 宇部興産建材株式会社 | Self-levelling material and concrete floor structure |
| CN112282294A (en) * | 2020-10-23 | 2021-01-29 | 安徽四建控股集团有限公司 | Construction method of steel fiber wear-resistant terrace |
| CN114105547A (en) * | 2021-12-27 | 2022-03-01 | 中国路桥工程有限责任公司 | Water-dispersion-resistant concrete and preparation method thereof |
| CN114195454A (en) * | 2021-12-17 | 2022-03-18 | 江苏华伟佳建材科技有限公司 | Light high-strength concrete material with self-leveling characteristic and preparation and construction methods thereof |
| CN114319778A (en) * | 2021-12-07 | 2022-04-12 | 成都建工第一建筑工程有限公司 | Construction method of foam concrete heat-preservation sound-insulation terrace |
-
2022
- 2022-05-11 CN CN202210510134.2A patent/CN114890741A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013170436A (en) * | 2012-02-22 | 2013-09-02 | Ube Ind Ltd | Method for constructing concrete floor structure |
| CN103121819A (en) * | 2013-03-05 | 2013-05-29 | 北京新奥混凝土集团有限公司 | C30 self-compacting concrete prepared from recycled aggregate and preparation method thereof |
| CN103130464A (en) * | 2013-03-05 | 2013-06-05 | 北京新奥混凝土集团有限公司 | C25 self-compaction concrete prepared from recycled aggregate and preparation method thereof |
| CN103130473A (en) * | 2013-03-05 | 2013-06-05 | 北京新奥混凝土集团有限公司 | C20 self-compaction concrete prepared from recycled aggregate and preparation method thereof |
| CN104788054A (en) * | 2015-04-10 | 2015-07-22 | 浙江大学宁波理工学院 | Eco-friendly self-compacting concrete prepared through complete recycling of waste concrete |
| CN104944863A (en) * | 2015-06-12 | 2015-09-30 | 中建商品混凝土西安有限公司 | Preparation method for high-strength self-compacting concrete with recycled fine aggregate |
| CN106220078A (en) * | 2016-07-08 | 2016-12-14 | 深圳广田集团股份有限公司 | A kind of mixed earth of lightweight self-compaction regeneration and preparation method thereof |
| CN106699057A (en) * | 2016-12-20 | 2017-05-24 | 桐乡市钟大建材有限公司 | Wood-grain-colored ecological self-compacted concrete material |
| CN108275936A (en) * | 2017-12-29 | 2018-07-13 | 上海国砼环保设备有限公司 | A kind of regeneration emery dust green concrete and preparation method thereof |
| JP2019172536A (en) * | 2018-03-29 | 2019-10-10 | 宇部興産建材株式会社 | Self-levelling material and concrete floor structure |
| CN109838047A (en) * | 2019-02-26 | 2019-06-04 | 青岛海川建设集团有限公司 | The composite foamed slurry construction of ZR |
| CN112282294A (en) * | 2020-10-23 | 2021-01-29 | 安徽四建控股集团有限公司 | Construction method of steel fiber wear-resistant terrace |
| CN114319778A (en) * | 2021-12-07 | 2022-04-12 | 成都建工第一建筑工程有限公司 | Construction method of foam concrete heat-preservation sound-insulation terrace |
| CN114195454A (en) * | 2021-12-17 | 2022-03-18 | 江苏华伟佳建材科技有限公司 | Light high-strength concrete material with self-leveling characteristic and preparation and construction methods thereof |
| CN114105547A (en) * | 2021-12-27 | 2022-03-01 | 中国路桥工程有限责任公司 | Water-dispersion-resistant concrete and preparation method thereof |
Non-Patent Citations (14)
| Title |
|---|
| 丁修河等: "浅谈楼面细石混凝土找平层", 《黑龙江科技信息》 * |
| 何海涛等: "屋面发泡水泥保温防水成套施工工法研究", 《全国商情(理论研究)》 * |
| 卢佳林等: "预拌现浇泡沫混凝土生产工艺关键技术的研究与应用", 《商品混凝土》 * |
| 史鹏: "泡沫混凝土在屋面隔热保温中的应用技术", 《建材与装饰》 * |
| 张英等: "泡沫混凝土在屋面保温工程中的应用", 《新型建筑材料》 * |
| 朱效荣编: "《数字量化混凝土实用技术》", 31 May 2016, 中国建材工业出版社 * |
| 杜宗岳等: "高性能再生骨料混凝土性质之探讨", 《建筑材料学报》 * |
| 杨红霞著: "《商品混凝土质量与成本控制技术》", 30 June 2014, 中国建材工业出版社 * |
| 王宗昌编: "建筑工程施工质量问答（第二版）", 中国建筑工业出版社 * |
| 田光龙: "浅述细石混凝土一次成活楼面施工技术的应用", 《科技促进发展》 * |
| 石莹等: "废弃混凝土再生微粉研究现状", 《砖瓦》 * |
| 蔡奕煜等: "高强轻骨料自密实混凝土制备与性能研究", 《科技风》 * |
| 虞春龙等: "自密实再生混凝土试验研究", 《低温建筑技术》 * |
| 郑爱武: "对再生混凝土回收利用的探讨", 《砖瓦》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100395216C (en) | Cement products | |
| CN107602018B (en) | silane coupling agent-fly ash floating bead light high-strength foam concrete and preparation method thereof | |
| CN110304876A (en) | A kind of complete gently haydite concrete and preparation method thereof | |
| CN102643057B (en) | Construction method of EPS (expanded polystyrene) light aggregate concrete thermal insulation building mould | |
| CN114477869A (en) | Thick-layer leveling material and construction method thereof | |
| CN106045559A (en) | Aerated concrete slab preparation method | |
| CN111960856B (en) | Heat-insulating sound-insulating concrete and preparation method and construction method thereof | |
| CN107162630A (en) | High-performance foam concrete self-insulating brick and its production technology and device | |
| EP3568273A2 (en) | Plant and method for producing pumice blocks having cavities filled with insulation material | |
| CN102674759A (en) | EPS (Expandable Polystyrene) light aggregate concrete thermal insulation hollow block and construction method thereof | |
| CN215106891U (en) | Building ground heat preservation sound insulation construction | |
| CN110126059A (en) | A kind of preparation process of precast concrete | |
| CN114890741A (en) | Low-carbon self-leveling lightweight concrete and preparation method and construction method thereof | |
| CN108996956A (en) | A kind of ground heater laying technique | |
| CN108018986A (en) | A kind of structure and half prefabricated Side fascia of energy saving integrated and its construction method | |
| CN114890761A (en) | Light gypsum wall slurry, light gypsum wall and preparation method thereof | |
| CN109553327B (en) | Concrete additive and preparation method and application thereof | |
| CN107246106A (en) | A kind of surface cuts shaping haydite concrete prefabricated panel | |
| CN208562169U (en) | A kind of concrete link plate | |
| CN110372280A (en) | Porous ceramicite concrete and its preparation method and application | |
| KR0120101B1 (en) | Process for the preparation of light weight pore concrete | |
| CN219060745U (en) | Hard foam polyurethane foaming heat-insulation floor | |
| CN220117664U (en) | Sound-insulation heat-preservation structure layer of regenerated aggregate floor slab | |
| RU2064408C1 (en) | Method of moulding building blocks | |
| CN114988808B (en) | Foam concrete slab capable of replacing traditional brick moulding bed and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220812 |
|
| RJ01 | Rejection of invention patent application after publication |