CN109020384A - A kind of reducing and anti-cracking cement and concrete pavement and preparation method thereof - Google Patents
A kind of reducing and anti-cracking cement and concrete pavement and preparation method thereof Download PDFInfo
- Publication number
- CN109020384A CN109020384A CN201811004756.8A CN201811004756A CN109020384A CN 109020384 A CN109020384 A CN 109020384A CN 201811004756 A CN201811004756 A CN 201811004756A CN 109020384 A CN109020384 A CN 109020384A
- Authority
- CN
- China
- Prior art keywords
- water
- cement
- reducing
- flyash
- sand
- 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
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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
Abstract
The invention discloses a kind of reducing and anti-cracking cement and concrete pavements and preparation method thereof, by water, cement, flyash, basalt fibre, lightweight aggregate, rubble, sand and water-reducing agent are prepared, wherein, water, cement, flyash, basalt fibre, lightweight aggregate, rubble, the mass ratio of sand and water-reducing agent is (180-200): (400-410): (40-50): (2.65-5.3): (229-286): (465-559): (830-850): (4.1-4.5), lightweight aggregate disperses more uniform in inside concrete in the concrete, and it is not easy to crack, caking property simultaneously between fiber and cement slurry is stronger, micro-crack development is slower, agent on crack resistance of concrete fatigue tensile capacity is stronger.
Description
Technical field
The invention belongs to technical field of concrete, it is related to a kind of reducing and anti-cracking cement and concrete pavement and preparation method thereof.
Background technique
Cement concrete pavement is the primary structure form of the existing paved road in China, however its early stage easy shrinkage cracking,
To the durability for reducing its bearing capacity, accelerating the erosion of harmful substance and seriously affecting concrete structure.It is outstanding in recent years
It is the development of various chemical admixtures (such as swelling agent, decrement anti-cracking agent), though the receipts of concrete can be reduced to a certain extent
Contracting cracking, but the incorporation of chemical admixture is easily reduced the degree of hydration of inside concrete and influences its tensile strength, and constructs
When it is not easy to control.Therefore, the early-age shrinkage and cracking for how reducing concrete, improving its durability becomes the current concrete of solution
One of key of application in highway engineering.
It include at present preferred material, structure design, construction technology improvement etc. for the measure for slowing down Shrinkage Cracking of Concrete
Aspect.And material is preferably to solve the problems, such as the shrinkage cracking of concrete from basic source.In current engineering practice, in lightweight aggregate
Curing concrete and fiber and steel bar reinforced concrete are considered as the reducing and anti-cracking performance that can be obviously improved concrete.In lightweight aggregate
Curing concrete itself has many advantages: (1) water imbibition of lightweight aggregate is strong, water-holding capacity is good；(2) lightweight aggregate rough surface is more
Hole enhances the bonding of it and Behavior of Hardened Cement Paste, makes whole even closer；(3) ratio of mud around lightweight aggregate is lower than far from lightweight aggregate
The ratio of mud, so that lightweight aggregate and the structure of cement slurry interfacial transition zone are even closer.For fiber and steel bar reinforced concrete, resistance
The advantage for splitting toughening is same obvious (by taking basalt fibre as an example): (1) adding suitable basalt fibre in concrete, stir
After uniformly, fiber is built in spacial framework, in disorderly to being uniformly distributed so that microcrack is met with during development each other
The probability of fiber dramatically increases, and fiber consumes the energy of crack progressing, then plays the role of resistance and splits toughening.(2) basalt
The elasticity modulus of fiber is higher than cement slurry in comparison, and the effect of the power such as cohesive force, mechanical interlocking between the two is played
The effect of " reinforcement ", it is even closer in conjunction with cement slurry to make fiber, so that improving concrete on the whole resists modeling
Property cracking performance.(3) although suitable incorporation basalt fibre brings micro-pore but can block inside concrete macrovoid
Connection, increase the density of concrete, change the original structure of cement slurry, make micro-crack number primary in concrete
Amount is reduced, and fracture width attenuates.
However, above-mentioned common reducing and anti-cracking concrete itself also has certain limitation: (1) for only leaning in lightweight aggregate
The concrete of maintenance also determines its feature lower than general aggregate density small intensity due to the porous speciality of lightweight aggregate itself.
When in a certain amount of lightweight aggregate incorporation normal concrete, rising phenomenon will be generated, general aggregate then sinks because density is big,
It is uneven in inside concrete dispersion to eventually lead to lightweight aggregate.In addition, excessive lightweight aggregate causes the intensity of concrete to decline, when
When the shrinkage stress of concrete reaches a certain level and generates crack, crack can be developed along the weak boundary of lightweight aggregate, therefore
The cracking easy to form in hardening of cement process.(2) equally, for only leaning on fiber and steel bar reinforced concrete, due to basalt fibre
Dimension surface hydrophilic reduces effective ratio of mud of concrete, makes concrete in early days as the incorporation of fiber absorbs partial moisture
Contraction increase, and hydration reaction do not occur sufficiently with cement for the moisture for being attracted to fiber surface, fiber and cement slurry it
Between caking property it is weak, therefore the effect of basalt fibre restrained shrinkage does not embody.In addition, though basalt fibre is to coagulation
Soil has resistance to split toughening effect, but this is that passively, static resistance is split, and is the mistake for continuing consumption to the tired tensile capacity of fiber itself
Journey, once microcrack occurs in concrete, just there is stress and concentrates weak spot in the reinforced fiber at this crack, and external load acting will be big
The frictional dissipation at fiber strain energy and interface is built up and be changed into amount, as a result will lead to fiber itself and is pulled off or is pulled out
Out, microcrack is developed rapidly, and concrete fatigue tensile capacity is had a greatly reduced quality.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of reducing and anti-cracking road surface coagulating cement is provided
Soil and preparation method thereof, lightweight aggregate disperses more uniform and not easy to crack in inside concrete in the concrete, at the same fiber with
Caking property between cement slurry is stronger, and micro-crack development is slower, and agent on crack resistance of concrete fatigue tensile capacity is stronger.
In order to achieve the above objectives, reducing and anti-cracking cement and concrete pavement of the present invention is by water, cement, flyash, profound
Military rock fiber, lightweight aggregate, rubble, sand and water-reducing agent are prepared, wherein water, cement, flyash, basalt fibre, light bone
Material, rubble, sand and water-reducing agent mass ratio be (180-200): (400-410): (40-50): (2.65-5.3): (229-286):
(465-559): (830-850): (4.1-4.5).
Water, cement, flyash, basalt fibre, lightweight aggregate, rubble, sand and water-reducing agent mass ratio be 180:405:45:
2.65:286:465:846:4.3.
Cement is 42.5 ordinary portland cement of PO.
Flyash is II grade of flyash, and the fineness of flyash is 14%, and the loss on ignition of flyash is 3.4%, flyash
Water demand ratio is 98%, and the 28d activity index of flyash is 82%.
Basalt fibre is the basalt fibre that is chopped, and the diameter of basalt fibre is 13 μm, length 20mm, tensile strength
For 4100~4800MPa, elasticity modulus is 93~110GPa, and fracture elongation is 3.0~3.2%, and single wire fracture intensity retains
Rate is 75%.
Lightweight aggregate is crushed stone type high-strength haydites of book structure, and the nominal particle diameter of lightweight aggregate is 5~20mm, and 1h water absorption rate is 4.2%,
Water absorption rate is 5.8% for 24 hours, and normal pressure is prewetted 6h.
Rubble is limestone gravel, and the partial size of rubble is 5~20mm, clay content 0.3%, elongated particles 4%.
Sand is the middle sand that fineness modulus is 2.43, and the apparent density of sand is 2600kg/m3, bulk density 1640kg/m3。
Water-reducing agent is Polycarboxylic Superplasticizer, and the water-reducing rate of water-reducing agent is 25%.
The preparation method of reducing and anti-cracking cement and concrete pavement of the present invention the following steps are included:
Weigh water, cement, flyash, basalt fibre, lightweight aggregate, rubble, sand and water-reducing agent, then by rubble and lightweight aggregate
It is uniformly mixed, sand, cement and flyash is then added, basalt fibre is added after being uniformly mixed, after mixing evenly
Water-reducing agent and water is added, finally stirs to sticky no laitance state, obtains reducing and anti-cracking cement and concrete pavement.
The invention has the following advantages:
Reducing and anti-cracking cement and concrete pavement of the present invention by water, cement, flyash, basalt fibre, lightweight aggregate,
Rubble, sand and water-reducing agent are prepared, wherein floating and general aggregate of the network structure that basalt fibre is formed to lightweight aggregate
Sunken caves phenomenon play certain inhibition, enable lightweight aggregate evenly dispersed in inside concrete, it is mixed to improve
The homogeneity of soil is coagulated, at the same time, the incorporation of basalt fibre and lightweight aggregate is so that concrete early-age shrinkage cracking quantity, width
And total area of cracks reduces, the release for the interior healthy water saved in lightweight aggregate promotes unhydrated cement, Ca in concrete2+After
Continuous reaction, the CaCO of generation3And entringite, to realize to the self-healing effect of concrete microcrack, has to fill up minute crack
The quantity and width of effect control early-age shrinkage cracking, increase substantially early strength of concrete and durability, prolong the service life,
The rate of development for reducing micro-crack, improves the antifatigue tensile capacity of concrete.
It should be noted that the present invention promotes the abundant aquation of cement by lightweight aggregate, to increase the intensity of concrete, reduce
The early-age shrinkage of concrete；Lightweight aggregate is tightly combined with Behavior of Hardened Cement Paste, to enhance the globality of concrete；It can be inhaled using lightweight aggregate
The characteristics of water, improves the quality of concrete so that lightweight aggregate and the structure of cement slurry interfacial transition zone are even closer, extends
Its service life.
Basalt fibre and cement slurry bonding are stronger, play the role of reinforcement, enhance the globality of concrete；Basalt
Fiber is uniformly distributed, and improves the homogeneity of concrete, consumes the energy of crack progressing, it is suppressed that the development in crack improves
The resistance plastic cracking performance of concrete, has changed simultaneously the original structure of cement slurry, has increased the density of concrete,
Reduce micro-crack quantity primary in concrete, fracture width attenuates, and further increases the toughness and impermeability of concrete.
By adding coal ash, cement and other admixtures are saved, water consumption is reduced；Greatly reduce the dry of concrete
Compression deformation and time deformation reduce the adiabatic temperature rise of concrete, while using the aggregate particle in flyash lubrication concrete, making
Frictional force between must gathering materials becomes smaller, and also makes the concrete scroll in concrete more uniform, improves concrete
Workability and mobility increase the density of concrete, improve volume stability and the service life of concrete；Save manufacture at
This, improves product quality.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
Embodiment one
Reducing and anti-cracking cement and concrete pavement of the present invention by water, cement, flyash, basalt fibre, lightweight aggregate,
Rubble, sand and water-reducing agent are prepared, wherein water, cement, flyash, basalt fibre, lightweight aggregate, rubble, sand and water-reducing agent
Mass ratio be 180:405:45:2.65:286:465:846:4.3.
Cement is 42.5 ordinary portland cement of PO.
Flyash is II grade of flyash, and the fineness of flyash is 14%, and the loss on ignition of flyash is 3.4%, flyash
Water demand ratio is 98%, and the 28d activity index of flyash is 82%.
Basalt fibre is the basalt fibre that is chopped, and the diameter of basalt fibre is 13 μm, length 20mm, tensile strength
For 4100~4800MPa, elasticity modulus is 93~110GPa, and fracture elongation is 3.0~3.2%, and single wire fracture intensity retains
Rate is 75%.
Lightweight aggregate is crushed stone type high-strength haydites of book structure, and the nominal particle diameter of lightweight aggregate is 5~20mm, and 1h water absorption rate is 4.2%,
Water absorption rate is 5.8% for 24 hours, and normal pressure is prewetted 6h.
Rubble is limestone gravel, and the partial size of rubble is 5~20mm, clay content 0.3%, elongated particles 4%.
Sand is the middle sand that fineness modulus is 2.43, and the apparent density of sand is 2600kg/m3, bulk density 1640kg/m3。
Water-reducing agent is Polycarboxylic Superplasticizer, and the water-reducing rate of water-reducing agent is 25%.
The preparation method of reducing and anti-cracking cement and concrete pavement of the present invention the following steps are included:
Weigh water, cement, flyash, basalt fibre, lightweight aggregate, rubble, sand and water-reducing agent, then by rubble and lightweight aggregate
It is uniformly mixed, sand, cement and flyash is then added, basalt fibre is added after being uniformly mixed, after mixing evenly
Water-reducing agent and water is added, finally stirs to sticky no laitance state, obtains reducing and anti-cracking cement and concrete pavement.
Sample flow and mechanical property test process are as follows, and evaluation index is slump value, 28d cubic compressive strength
And 28d cuboid bending tensile strength:
Concrete mix should be packed into rapidly mold immediately after completing slump consistancy test, be put on vibrator and carry out
It vibrates, it is die-filling in two times, it plasters on a vibration table after die-filling for the second time, it is possible that pottery during plastering
The slight floating of grain, needs to be pressed down with trowel, smears repeatedly until plane is smooth, removes afterwards mold and carry out test volume for 24 hours
Number.
It being put into fog room and carries out standard curing, temperature control is in (20 ± 2) DEG C or so, 95% or more relative humidity, until
It is tested after 28 day age, table 1 is the slump value and mechanical property test result for the sample that embodiment one obtains.
Table 1
The shrinking percentage testing experiment of sample different larval instar:
Mix will be got out to pour into having a size of 100mm × 100mm × 515mm concrete prism；
Prism concrete sample after molding is conserved to 24 as a child rear demouldings under the conditions of standard curing, and recorded
The initial length of good initial test specimen；
Dial holder is located on bracket, sheet glass is pasted onto prism both ends with double-sided adhesive, makes measuring surface is smooth to subtract
Small error；
Test specimen is moved into environment temperature control at 20 DEG C, the interior that humidity is 60% or so carries out coagulation by the scheduled time
The measurement of native shrinking percentage, table 2 are the shrinking percentage test result for the sample different larval instar that embodiment one obtains.
Table 2
Sample plate crazing-resistance test:
The concrete mix being stirred is moved into flat plate mold from blender, while having poured two test specimens, this mistake
Journey pays attention to that plastic film is protected not scratched, and surface is smoothed out, then is covered on its surface with plastic film by molding of then vibrating,
Demoulding after 2h.
In order to allow the test block poured as early as possible dehydration and generate crack, convenient for the analysis to test specimen cracking resistance, torn open to test specimen
It after mould, is dried immediately with electric fan, and adjusts height and the position of fan, guarantee that wind direction can be parallel to test specimen table
Face, and keeping surface of test piece middle and upper part wind speed is 4m/s~5m/s.Kept for 20 DEG C ± 5 DEG C of test temperature, relative humidity is not more than
60%.
Test specimen is observed continuously, records the hair that the initial cracking time of the first crack and the crack for 24 hours occurs in each test specimen
Exhibition and cracking situation, wherein the crack gross area including each test specimen, crack maximum width, crack total number and fracture width
The number of distribution, carries out related assays and record work, and table 3 is the sample plate crazing-resistance test statistics that embodiment one is prepared
Test result.
Table 3
As shown in table 1, table 2, table 3, compared with normal concrete, the concrete that the present invention is prepared is meeting workability
And in the case where mechanical property, the shrinking percentage of 56d reduces 23.6%, and initial cracking time averagely extends 82min, for 24 hours when crack
Average area of cracks reduce 58.9%, unit area crack crack number reduce 84%, total area of cracks of unit area subtracts
Few 93.4%, maximum crack width reduces 68.2%, and crack quantity of the width greater than 1mm and 0.5~1mm is constantly reduced, and 0~
Crack number within the scope of 0.5mm increased.It can be seen that the contract with dry rate of reducing and anti-cracking cement and concrete pavement of the invention
Low, initial cracking time is delayed and flaw area, number, width all substantially reduce.
Embodiment two
Reducing and anti-cracking cement and concrete pavement of the present invention by water, cement, flyash, basalt fibre, lightweight aggregate,
Rubble, sand and water-reducing agent are prepared, wherein water, cement, flyash, basalt fibre, lightweight aggregate, rubble, sand and water-reducing agent
Mass ratio be 180:410:40:5.3:229:559:830:4.5.
Cement is 42.5 ordinary portland cement of PO.
Flyash is II grade of flyash, and the fineness of flyash is 14%, and the loss on ignition of flyash is 3.4%, flyash
Water demand ratio is 98%, and the 28d activity index of flyash is 82%.
Basalt fibre is the basalt fibre that is chopped, and the diameter of basalt fibre is 13 μm, length 20mm, tensile strength
For 4100~4800MPa, elasticity modulus is 93~110GPa, and fracture elongation is 3.0~3.2%, and single wire fracture intensity retains
Rate is 75%.
Lightweight aggregate is crushed stone type high-strength haydites of book structure, and the nominal particle diameter of lightweight aggregate is 5~20mm, and 1h water absorption rate is 4.2%,
Water absorption rate is 5.8% for 24 hours, and normal pressure is prewetted 6h.
Rubble is limestone gravel, and the partial size of rubble is 5~20mm, clay content 0.3%, elongated particles 4%.
Sand is the middle sand that fineness modulus is 2.43, and the apparent density of sand is 2600kg/m3, bulk density 1640kg/m3。
Water-reducing agent is Polycarboxylic Superplasticizer, and the water-reducing rate of water-reducing agent is 25%.
The preparation method of reducing and anti-cracking cement and concrete pavement of the present invention the following steps are included:
Weigh water, cement, flyash, basalt fibre, lightweight aggregate, rubble, sand and water-reducing agent, then by rubble and lightweight aggregate
It is uniformly mixed, sand, cement and flyash is then added, basalt fibre is added after being uniformly mixed, after mixing evenly
Water-reducing agent and water is added, finally stirs to sticky no laitance state, obtains reducing and anti-cracking cement and concrete pavement.
Embodiment three
Reducing and anti-cracking cement and concrete pavement of the present invention by water, cement, flyash, basalt fibre, lightweight aggregate,
Rubble, sand and water-reducing agent are prepared, wherein water, cement, flyash, basalt fibre, lightweight aggregate, rubble, sand and water-reducing agent
Mass ratio be 200:400:50:2.65:286:465:850:4.1.
Cement is 42.5 ordinary portland cement of PO.
Flyash is II grade of flyash, and the fineness of flyash is 14%, and the loss on ignition of flyash is 3.4%, flyash
Water demand ratio is 98%, and the 28d activity index of flyash is 82%.
Basalt fibre is the basalt fibre that is chopped, and the diameter of basalt fibre is 13 μm, length 20mm, tensile strength
For 4100~4800MPa, elasticity modulus is 93~110GPa, and fracture elongation is 3.0~3.2%, and single wire fracture intensity retains
Rate is 75%.
Lightweight aggregate is crushed stone type high-strength haydites of book structure, and the nominal particle diameter of lightweight aggregate is 5~20mm, and 1h water absorption rate is 4.2%,
Water absorption rate is 5.8% for 24 hours, and normal pressure is prewetted 6h.
Rubble is limestone gravel, and the partial size of rubble is 5~20mm, clay content 0.3%, elongated particles 4%.
Sand is the middle sand that fineness modulus is 2.43, and the apparent density of sand is 2600kg/m3, bulk density 1640kg/m3。
Water-reducing agent is Polycarboxylic Superplasticizer, and the water-reducing rate of water-reducing agent is 25%.
The preparation method of reducing and anti-cracking cement and concrete pavement of the present invention the following steps are included:
Weigh water, cement, flyash, basalt fibre, lightweight aggregate, rubble, sand and water-reducing agent, then by rubble and lightweight aggregate
It is uniformly mixed, sand, cement and flyash is then added, basalt fibre is added after being uniformly mixed, after mixing evenly
Water-reducing agent and water is added, finally stirs to sticky no laitance state, obtains reducing and anti-cracking cement and concrete pavement.
Example IV
Reducing and anti-cracking cement and concrete pavement of the present invention by water, cement, flyash, basalt fibre, lightweight aggregate,
Rubble, sand and water-reducing agent are prepared, wherein water, cement, flyash, basalt fibre, lightweight aggregate, rubble, sand and water-reducing agent
Mass ratio be 190:405:45:2.7:250:500:840:4.2.
Cement is 42.5 ordinary portland cement of PO.
Flyash is II grade of flyash, and the fineness of flyash is 14%, and the loss on ignition of flyash is 3.4%, flyash
Water demand ratio is 98%, and the 28d activity index of flyash is 82%.
Basalt fibre is the basalt fibre that is chopped, and the diameter of basalt fibre is 13 μm, length 20mm, tensile strength
For 4100~4800MPa, elasticity modulus is 93~110GPa, and fracture elongation is 3.0~3.2%, and single wire fracture intensity retains
Rate is 75%.
Lightweight aggregate is crushed stone type high-strength haydites of book structure, and the nominal particle diameter of lightweight aggregate is 5~20mm, and 1h water absorption rate is 4.2%,
Water absorption rate is 5.8% for 24 hours, and normal pressure is prewetted 6h.
Rubble is limestone gravel, and the partial size of rubble is 5~20mm, clay content 0.3%, elongated particles 4%.
Sand is the middle sand that fineness modulus is 2.43, and the apparent density of sand is 2600kg/m3, bulk density 1640kg/m3。
Water-reducing agent is Polycarboxylic Superplasticizer, and the water-reducing rate of water-reducing agent is 25%.
The preparation method of reducing and anti-cracking cement and concrete pavement of the present invention the following steps are included:
Weigh water, cement, flyash, basalt fibre, lightweight aggregate, rubble, sand and water-reducing agent, then by rubble and lightweight aggregate
It is uniformly mixed, sand, cement and flyash is then added, basalt fibre is added after being uniformly mixed, after mixing evenly
Water-reducing agent and water is added, finally stirs to sticky no laitance state, obtains reducing and anti-cracking cement and concrete pavement.
Embodiment five
Reducing and anti-cracking cement and concrete pavement of the present invention by water, cement, flyash, basalt fibre, lightweight aggregate,
Rubble, sand and water-reducing agent are prepared, wherein water, cement, flyash, basalt fibre, lightweight aggregate, rubble, sand and water-reducing agent
Mass ratio be 195:408:48:5.2:270:520:845:4.4.
Cement is 42.5 ordinary portland cement of PO.
Flyash is II grade of flyash, and the fineness of flyash is 14%, and the loss on ignition of flyash is 3.4%, flyash
Water demand ratio is 98%, and the 28d activity index of flyash is 82%.
Basalt fibre is the basalt fibre that is chopped, and the diameter of basalt fibre is 13 μm, length 20mm, tensile strength
For 4100~4800MPa, elasticity modulus is 93~110GPa, and fracture elongation is 3.0~3.2%, and single wire fracture intensity retains
Rate is 75%.
Lightweight aggregate is crushed stone type high-strength haydites of book structure, and the nominal particle diameter of lightweight aggregate is 5~20mm, and 1h water absorption rate is 4.2%,
Water absorption rate is 5.8% for 24 hours, and normal pressure is prewetted 6h.
Rubble is limestone gravel, and the partial size of rubble is 5~20mm, clay content 0.3%, elongated particles 4%.
Sand is the middle sand that fineness modulus is 2.43, and the apparent density of sand is 2600kg/m3, bulk density 1640kg/m3。
Water-reducing agent is Polycarboxylic Superplasticizer, and the water-reducing rate of water-reducing agent is 25%.
The preparation method of reducing and anti-cracking cement and concrete pavement of the present invention the following steps are included:
Weigh water, cement, flyash, basalt fibre, lightweight aggregate, rubble, sand and water-reducing agent, then by rubble and lightweight aggregate
It is uniformly mixed, sand, cement and flyash is then added, basalt fibre is added after being uniformly mixed, after mixing evenly
Water-reducing agent and water is added, finally stirs to sticky no laitance state, obtains reducing and anti-cracking cement and concrete pavement.
Embodiment six
Reducing and anti-cracking cement and concrete pavement of the present invention by water, cement, flyash, basalt fibre, lightweight aggregate,
Rubble, sand and water-reducing agent are prepared, wherein water, cement, flyash, basalt fibre, lightweight aggregate, rubble, sand and water-reducing agent
Mass ratio be 185:402:42:2.7:240:480:835:4.3.
Cement is 42.5 ordinary portland cement of PO.
Flyash is II grade of flyash, and the fineness of flyash is 14%, and the loss on ignition of flyash is 3.4%, flyash
Water demand ratio is 98%, and the 28d activity index of flyash is 82%.
Basalt fibre is the basalt fibre that is chopped, and the diameter of basalt fibre is 13 μm, length 20mm, tensile strength
For 4100~4800MPa, elasticity modulus is 93~110GPa, and fracture elongation is 3.0~3.2%, and single wire fracture intensity retains
Rate is 75%.
Lightweight aggregate is crushed stone type high-strength haydites of book structure, and the nominal particle diameter of lightweight aggregate is 5~20mm, and 1h water absorption rate is 4.2%,
Water absorption rate is 5.8% for 24 hours, and normal pressure is prewetted 6h.
Rubble is limestone gravel, and the partial size of rubble is 5~20mm, clay content 0.3%, elongated particles 4%.
Sand is the middle sand that fineness modulus is 2.43, and the apparent density of sand is 2600kg/m3, bulk density 1640kg/m3。
Water-reducing agent is Polycarboxylic Superplasticizer, and the water-reducing rate of water-reducing agent is 25%.
The preparation method of reducing and anti-cracking cement and concrete pavement of the present invention the following steps are included:
Weigh water, cement, flyash, basalt fibre, lightweight aggregate, rubble, sand and water-reducing agent, then by rubble and lightweight aggregate
It is uniformly mixed, sand, cement and flyash is then added, basalt fibre is added after being uniformly mixed, after mixing evenly
Water-reducing agent and water is added, finally stirs to sticky no laitance state, obtains reducing and anti-cracking cement and concrete pavement.
It should be noted that the present invention prewets lightweight aggregate normal pressure 6h, both guaranteed that it kept faster within the time of prewetting
Rate of water absorption improves construction efficiency, and guarantees that it can discharge enough interior healthy waters for the abundant aquation of cement in early stage, reduces
The early-age shrinkage of concrete.
The present invention adds Polycarboxylic Superplasticizer in concrete, reduces mixing water amount；Significantly improve coagulation
The intensity of soil；Improve the workability of concrete；Increase the compactness with regard to concrete；Concrete quality is improved, its use is extended
Service life.
Claims (10)
1. a kind of reducing and anti-cracking cement and concrete pavement, which is characterized in that by water, cement, flyash, basalt fibre, light bone
Material, rubble, sand and water-reducing agent are prepared, wherein water, cement, flyash, basalt fibre, lightweight aggregate, rubble, sand and subtract
The mass ratio of aqua is (180-200): (400-410): (40-50): (2.65-5.3): (229-286): (465-559):
(830-850): (4.1-4.5).
2. reducing and anti-cracking cement and concrete pavement according to claim 1, which is characterized in that water, cement, flyash, profound
Military rock fiber, lightweight aggregate, rubble, sand and water-reducing agent mass ratio be 180:405:45:2.65:286:465:846:4.3.
3. reducing and anti-cracking cement and concrete pavement according to claim 1, which is characterized in that cement is that PO 42.5 is general
Logical portland cement.
4. reducing and anti-cracking cement and concrete pavement according to claim 1, which is characterized in that flyash is II grade of fine coal
Ash, the fineness of flyash are 14%, and the loss on ignition of flyash is 3.4%, and the water demand ratio of flyash is 98%, flyash
28d activity index is 82%.
5. reducing and anti-cracking cement and concrete pavement according to claim 1, which is characterized in that basalt fibre is profound to be chopped
Military rock fiber, the diameter of basalt fibre are 13 μm, length 20mm, and tensile strength is 4100~4800MPa, and elasticity modulus is
93~110GPa, fracture elongation are 3.0~3.2%, and single wire fracture strength retention ratio is 75%.
6. reducing and anti-cracking cement and concrete pavement according to claim 1, which is characterized in that lightweight aggregate is crushed stone type high-strength
Haydites of book structure, the nominal particle diameter of lightweight aggregate are 5~20mm, and 1h water absorption rate is 4.2%, and water absorption rate is 5.8% for 24 hours, and normal pressure is prewetted
6h。
7. reducing and anti-cracking cement and concrete pavement according to claim 1, which is characterized in that rubble is limestone gravel,
The partial size of rubble is 5~20mm, clay content 0.3%, elongated particles 4%.
8. reducing and anti-cracking cement and concrete pavement according to claim 1, which is characterized in that sand is that fineness modulus is 2.43
Middle sand, the apparent density of sand is 2600kg/m3, bulk density 1640kg/m3。
9. reducing and anti-cracking cement and concrete pavement according to claim 1, which is characterized in that water-reducing agent is that polycarboxylic acid is high
Water-reducing agent is imitated, the water-reducing rate of water-reducing agent is 25%.
10. the preparation method of reducing and anti-cracking cement and concrete pavement described in a kind of claim 1, which is characterized in that including following
Step:
Water, cement, flyash, basalt fibre, lightweight aggregate, rubble, sand and water-reducing agent are weighed by claim 1, then by rubble
It is uniformly mixed with lightweight aggregate, sand, cement and flyash is then added, basalt fibre is added after being uniformly mixed, stirs
Water-reducing agent and water is added after mixing uniformly, finally stirs to sticky no laitance state, obtains reducing and anti-cracking cement and concrete pavement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811004756.8A CN109020384A (en) | 2018-08-30 | 2018-08-30 | A kind of reducing and anti-cracking cement and concrete pavement and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811004756.8A CN109020384A (en) | 2018-08-30 | 2018-08-30 | A kind of reducing and anti-cracking cement and concrete pavement and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109020384A true CN109020384A (en) | 2018-12-18 |
Family
ID=64626408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811004756.8A Pending CN109020384A (en) | 2018-08-30 | 2018-08-30 | A kind of reducing and anti-cracking cement and concrete pavement and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109020384A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110183184A (en) * | 2019-06-10 | 2019-08-30 | 济南大学 | A kind of high self-healing performance concrete that interior humidity is controllable |
| CN111499309A (en) * | 2020-05-07 | 2020-08-07 | 山东大学 | Concrete mixed with basalt fibers and metakaolin and preparation method thereof |
| CN111825394A (en) * | 2020-07-23 | 2020-10-27 | 广州市广丰混凝土有限公司 | Anti-crack concrete |
| CN112329219A (en) * | 2020-10-26 | 2021-02-05 | 中国科学院力学研究所 | Method for calculating tensile damage area of rock containing micropores and microcracks in Brazilian splitting experiment |
| CN112341085A (en) * | 2020-11-06 | 2021-02-09 | 绍兴宝城建筑工业化制造有限公司 | Concrete and preparation method thereof |
| CN113061000A (en) * | 2021-05-12 | 2021-07-02 | 烟台蒙特混凝土有限公司 | Anti-crack concrete |
| CN113582606A (en) * | 2021-06-28 | 2021-11-02 | 福建工大岩土工程研究所有限公司 | Material for small prefabricated part of highway subgrade and preparation method thereof |
| CN113788660A (en) * | 2021-10-27 | 2021-12-14 | 天元建设集团有限公司 | High-strength anti-crack concrete |
| CN114315294A (en) * | 2021-12-06 | 2022-04-12 | 北京建筑大学 | Low-strength tough waterproof concrete for underground engineering and preparation method thereof |
| CN114656218A (en) * | 2022-04-20 | 2022-06-24 | 天一建设发展有限公司 | Anti-crack concrete with low shrinkage rate and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160144058A (en) * | 2015-06-08 | 2016-12-16 | 한국건설기술연구원 | Ultra-high performance concrete for mixing micro basalt fiber and macro steel fiber, and manufacturing method for the same |
| CN106904881A (en) * | 2017-01-20 | 2017-06-30 | 湖北省路桥集团有限公司 | High performance structures light aggregate concrete and preparation method thereof |
| CN107200516A (en) * | 2017-06-02 | 2017-09-26 | 吉林建筑大学 | A kind of treated basalt fiber enhancing scoria light aggregate concrete and preparation method |
| CN108083837A (en) * | 2018-01-20 | 2018-05-29 | 南京理工大学 | A kind of chopped basalt fibre toughening silicate light-weight aggregate and preparation method thereof |
| CN108191357A (en) * | 2018-04-02 | 2018-06-22 | 安阳师范学院 | A kind of enhancing C30 flyash-haydite concretes and preparation method thereof |
-
2018
- 2018-08-30 CN CN201811004756.8A patent/CN109020384A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160144058A (en) * | 2015-06-08 | 2016-12-16 | 한국건설기술연구원 | Ultra-high performance concrete for mixing micro basalt fiber and macro steel fiber, and manufacturing method for the same |
| CN106904881A (en) * | 2017-01-20 | 2017-06-30 | 湖北省路桥集团有限公司 | High performance structures light aggregate concrete and preparation method thereof |
| CN107200516A (en) * | 2017-06-02 | 2017-09-26 | 吉林建筑大学 | A kind of treated basalt fiber enhancing scoria light aggregate concrete and preparation method |
| CN108083837A (en) * | 2018-01-20 | 2018-05-29 | 南京理工大学 | A kind of chopped basalt fibre toughening silicate light-weight aggregate and preparation method thereof |
| CN108191357A (en) * | 2018-04-02 | 2018-06-22 | 安阳师范学院 | A kind of enhancing C30 flyash-haydite concretes and preparation method thereof |
Non-Patent Citations (6)
| Title |
|---|
| 刘冬梅: "《水泥及混凝土检验员常用标准汇编》", 31 January 2016, 中国建材工业出版社 * |
| 卢来运: "《粉煤灰混凝土在桥梁下部构造中的应用技术》", 30 September 2016, 黄河水利出版社 * |
| 林锦眉: "《土木工程材料实验》", 31 July 2014, 中国建材工业出版社 * |
| 王洪镇: "《流态轻集料微孔混凝土技术》", 31 October 2013, 中国建材工业出版社 * |
| 王钧等: "玄武岩纤维增强高强轻骨料混凝土基本力学性能试验", 《建筑科学》 * |
| 赵顺波: "《混凝土结构设计原理》", 31 August 2013, 同济大学出版社 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110183184A (en) * | 2019-06-10 | 2019-08-30 | 济南大学 | A kind of high self-healing performance concrete that interior humidity is controllable |
| CN111499309A (en) * | 2020-05-07 | 2020-08-07 | 山东大学 | Concrete mixed with basalt fibers and metakaolin and preparation method thereof |
| CN111825394A (en) * | 2020-07-23 | 2020-10-27 | 广州市广丰混凝土有限公司 | Anti-crack concrete |
| CN112329219A (en) * | 2020-10-26 | 2021-02-05 | 中国科学院力学研究所 | Method for calculating tensile damage area of rock containing micropores and microcracks in Brazilian splitting experiment |
| CN112329219B (en) * | 2020-10-26 | 2024-01-26 | 中国科学院力学研究所 | Method for calculating tensile damage area of rock containing micropores and microcracks in Brazilian split experiment |
| CN112341085A (en) * | 2020-11-06 | 2021-02-09 | 绍兴宝城建筑工业化制造有限公司 | Concrete and preparation method thereof |
| CN113061000A (en) * | 2021-05-12 | 2021-07-02 | 烟台蒙特混凝土有限公司 | Anti-crack concrete |
| CN113582606A (en) * | 2021-06-28 | 2021-11-02 | 福建工大岩土工程研究所有限公司 | Material for small prefabricated part of highway subgrade and preparation method thereof |
| CN113788660A (en) * | 2021-10-27 | 2021-12-14 | 天元建设集团有限公司 | High-strength anti-crack concrete |
| CN114315294A (en) * | 2021-12-06 | 2022-04-12 | 北京建筑大学 | Low-strength tough waterproof concrete for underground engineering and preparation method thereof |
| CN114656218A (en) * | 2022-04-20 | 2022-06-24 | 天一建设发展有限公司 | Anti-crack concrete with low shrinkage rate and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109020384A (en) | A kind of reducing and anti-cracking cement and concrete pavement and preparation method thereof | |
| Guan et al. | An economical ultra-high ductile engineered cementitious composite with large amount of coarse river sand | |
| Nahhab et al. | Influence of content and maximum size of light expanded clay aggregate on the fresh, strength, and durability properties of self-compacting lightweight concrete reinforced with micro steel fibers | |
| Mermerdaş et al. | Effect of aggregate properties on the mechanical and absorption characteristics of geopolymer mortar | |
| Hilal | Hardened properties of self-compacting concrete with different crumb rubber size and content | |
| Al Saffar et al. | Effect of internal curing on behavior of high performance concrete: An overview | |
| Wang et al. | Study on the improvement of the waterproof and mechanical properties of hemihydrate phosphogypsum-based foam insulation materials | |
| Braga et al. | Reduction of the cement content in mortars made with fine concrete aggregates | |
| Li et al. | Internal curing effect of saturated recycled fine aggregates in early-age mortar | |
| Zhan et al. | Multi-scale study on synergistic effect of cement replacement by metakaolin and typical supplementary cementitious materials on properties of ultra-high performance concrete | |
| Zhang et al. | Influence of SiO2/Na2O molar ratio on mechanical properties and durability of metakaolin-fly ash blend alkali-activated sustainable mortar incorporating manufactured sand | |
| Nazari et al. | RETRACTED: Assessment of the effects of Fe2O3 nanoparticles on water permeability, workability, and setting time of concrete | |
| Haddadou et al. | The effect of hybrid steel fiber on the properties of fresh and hardened self-compacting concrete | |
| Golewski | Assessing of water absorption on concrete composites containing fly ash up to 30% in regards to structures completely immersed in water | |
| Sajedi et al. | Thermal activation of ordinary Portland cement–slag mortars | |
| CN111302739A (en) | Shrinkage-reducing and anti-cracking concrete doped with fibers and SAP (super absorbent Polymer) and preparation method thereof | |
| CN103819158B (en) | The preparation method of high volume stability concrete | |
| Ou et al. | Development of drying shrinkage model for alkali-activated slag concrete | |
| CN110407521A (en) | A kind of self-compaction UHPC and preparation method thereof containing microballon | |
| CN108529993A (en) | A kind of high spin system of high-strength high-elasticity modulus | |
| Khattab et al. | Performance of recycled aggregate concrete made with waste refractory brick | |
| CN110041025A (en) | A kind of ameliorative mass concrete and preparation method thereof | |
| CN111393094A (en) | Recycled aggregate concrete and preparation method thereof | |
| Akinwande et al. | Development of insulating masonry bricks from wood fiber and varying milled glass proportion | |
| Angelin et al. | Fresh and hardened properties of self-compacting concrete modified with lightweight and recycled aggregates |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181218 |