CN106045557A - Self-compacting concrete for road engineering - Google Patents
Self-compacting concrete for road engineering Download PDFInfo
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- CN106045557A CN106045557A CN201610380886.6A CN201610380886A CN106045557A CN 106045557 A CN106045557 A CN 106045557A CN 201610380886 A CN201610380886 A CN 201610380886A CN 106045557 A CN106045557 A CN 106045557A
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- Prior art keywords
- self
- compacting concrete
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- road engineering
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses self-compacting concrete for road engineering. The self-compacting concrete has a porous structure, and the gas content of the concrete is 15-20%. By introducing massive bubbles to self-compacting concrete slurry, consumption of a medium-and-low-strength self-compacting concrete cementitious material and hydration heat are effectively reduced, and the thixotropy, volume stability and microstructure of the concrete are improved. The strength grade of the medium-and-low-strength self-compacting concrete is C10-C50, slump flow can be adjusted within the range of 600-850 mm according to operating requirements, the difference between slump flow and J ring flow is smaller than 20 mm, and separation ratio is smaller than 10%. The self-compacting concrete can be applied to constructional engineering, roadbed and levee crown road engineering, watercourse and channel construction and repair, and rock filling.
Description
Technical field
The invention belongs to civil engineering material field, relate to a kind of self-compacting concrete for road engineering.
Background technology
Self-compacting concrete is a kind of high-performance coagulation with features such as high fluidity, high fillibility, high education resistances
Soil, other are unsuitable for the occasion of manual stirring to be suitable for large span, high density reinforcing bar etc..By selecting Binder Materials, coarse-fine aggregate
Carry out meticulous mix-design with high performance additive, be reduced to the yield stress of concrete be enough to by because of deadweight generation
Shear stress overcomes, and makes concrete flowability increase, but occurs without isolation and bleeding problem, can be sufficient filling with the sky in template
Between, form closely knit and uniform jelling structure.
In order to meet its high fluidity requirement, self-compacting concrete often has high gel material content and water reducer is mixed
Amount, the feature of relatively low water binder ratio.The technology path of very widely used today self-compacting concrete and compound method are mainly: use
A large amount of cement and mineral admixture improve gel material content, flyash, breeze, silicon in such as every cubic metre self-compacting concrete
The consumption of powder and cement is the most all at more than 450kg；By condensation polymer type or copoly type water reducer as high efficiency water reducing agent to cement
Particle produces the mechanism of strong peptizaiton, stops dispersed particle cohesion；Fill appropriate mineral admixture regulation concrete
Rheological property, improves plastic viscosity, improves concrete workability；Mix appropriate cement expansive material, can be improved concrete oneself
Density and produce contraction fissure after preventing concrete hardening, improves concrete capacity against cracking；Suitably increase sand coarse aggregate ratio and control thick
Aggregate size；Suitably use viscosifier to increase the viscosity of mixture；Select admixture kind, replace cement amount and air entraining agent product
Plant and consumption；The self-compacting concrete intensity of preparation is higher, and within 28 days, intensity is the most all at more than C50.
Existing self-compaction coagulation glue is smaller, and intensity is the highest；A large amount of in order to increase self-compacting concrete mobility
Use Binder Materials, cause Slurry transport relatively big, cause volume of concrete to shrink relatively big, the volume stability of concrete is caused
Harmful effect, the most a large amount of uses mineral admixtures it is also possible that self-compacting concrete endurance quality has a certain degree of fall
Low.
Accordingly, it would be desirable to a kind of new self-compacting concrete is to solve the problems referred to above.
Summary of the invention
Goal of the invention: for the problem overcoming prior art to exist, the present invention provide a kind of for road engineering from close
Real concrete.
For solving above-mentioned technical problem, the technical scheme that the self-compacting concrete for road engineering of the present invention is used
For a kind of self-compacting concrete for road engineering, including the component of following weight portion: 200 ~ 350 parts of slurries, 400 ~ 550
Part fine aggregate, 350 ~ 600 parts of coarse aggregates and 50-80 part chemical gas generation agent, described slurry includes the component of following weight portion: 100 ~
150 parts of cement, 20 ~ 100 parts of Binder Materials, 0.5 ~ 1 part of water reducer, 0 ~ 0.5 part of viscosifier, 5 ~ 10 parts of water-retaining agent, 0.1 ~ 1 part draw
Gas agent, 0 ~ 2 part of waterproofing agent and 80 ~ 100 parts of water,.
Further, during described Binder Materials is flyash, ground slag powder, metakaolin, silica flour and regenerative micro powder
The combination of any one or more.
Further, described water reducer is copoly type water reducer and the mixture of condensation polymer type water reducer, described copoly type
Water reducer is shrinkage type polycarboxylate water-reducer, and described condensation polymer type water reducer is the one in naphthalene water reducer and aliphatic water reducing agent
Or the combination of two kinds.This water reducer possesses the sterically hindered and dual dispersion of electrostatic repulsion and Xu puts effect, and water-reducing rate reaches 25%-
45%, solve and self-compacting concrete uses condensation polymer type water reducer collapse to damage bigger problem, solve again use copoly type diminishing
Agent workability that may be present problem.
Further, the weight ratio of described copoly type water reducer and condensation polymer type water reducer is 1:3-4.Water-reducing rate is higher can
To reach 35%-45%, it is possible to effectively solve that self-compacting concrete uses condensation polymer type water reducer to collapse and damage bigger problem.
Further, described water-retaining agent is nano-bentonite.Nano-bentonite is to use modified the receiving of polyalcohol intercalation
Rice bentonite.Can make that self-compacting concrete is constant in further hydration to absorb water from bentonite, reach continuous hydration and
Self-curing effect.
Further, described air entraining agent is Colophonium and the maleic acid-copolymer of Polyethylene Glycol monoesters, rosin soap, Colophonium
One or both mixture in pyrolytic polymer and sodium lauryl sulphate.
Further, described chemical gas generation agent is aluminium powder or hydrogenperoxide steam generator.Chemical gas generation is to use aluminium powder or mistake
Hydrogen peroxide solution is chemical gas generation agent, foaming agent and the alkali reaction in cement, produces gas, so that concrete has specifically
Bubble structure.When carrying out mix-design, when slurry air content is Va, gassiness concrete is relative to same water-cement ratio concrete
Strength reduction factor is 1.26 (1-Va)3.In actual applications, when using chemical gas generation, the foaming agent measured is in pouring
In front addition concrete batch plant, quickly stir 6 ~ 20 seconds, carry out concreting immediately.
Further, described waterproofing agent is calcium stearate.Use calcium stearate as foam stabilizer and waterproofing agent, make simultaneously
Stablize air bubble content with viscosifier, strengthen slurry thixotropy.
Further, described coarse aggregate is natural or the stone of regeneration use, and the particle diameter of coarse aggregate is 5 ~ 31.5mm.
Further, appointing during described fine aggregate is river sand, fluvial sand, washing sea sand, Machine-made Sand, CHARACTERISTICS OF TAILINGS SAND and natural sand
Anticipate a kind of or mixture of any two kinds.
Beneficial effect: the self-compacting concrete for road engineering of the present invention has microcellular structure, the gassiness of concrete
Amount is 15% ~ 20%, introduces a large amount of bubble and significantly reduce Medium and low intensity self-compacting concrete in self-compacting concrete slurry
Gel material content and the heat of hydration, improve the thixotropy of concrete, volume stability and microstructure.This Medium and low intensity is from close
Real concrete, strength grade is C10-C50, and slump flow test can regulate and control in the range of 600-850 mm by using requirement, collapses
Divergence is less than 10% with J ring divergence difference less than 20 mm, isolation rate, can be used for architectural engineering, roadbed and levee crown road work
The constructing and repair and enrockment filling of journey, river course and channel.
Detailed description of the invention
Embodiment 1
Self-compacting concrete includes following components: use P.O 42.5 cement 150 parts, 100 parts of flyash, 5-10mm particle diameter broken
300 parts of stone, 10-15mm Stone 300 parts, 15-20mm rubble 200 parts, natural sand 500 parts, 100 parts of water, the poly-carboxylic of shrinkage type
Acid water reducer and 1 part of the mixture of naphthalene water reducer, nano-bentonite 10 parts, Colophonium are total to maleic acid-Polyethylene Glycol monoesters
Polymers 0.1 part, rosin soap 0.2 part, viscosifier 0.1 part, calcium stearate 0.3 part.Shrinkage type polycarboxylate water-reducer and naphthalene system diminishing
In the mixture of agent, the mass ratio of shrinkage type polycarboxylate water-reducer and naphthalene water reducer is 1:3.50 parts of chemical gas generation agent, wherein,
Chemical gas generation agent is aluminium powder.
The detailed description of the invention of the present invention, uses agitating device, after sand and cement, flyash, rubble dry mixing 20 seconds, adds
Entering other component, then release after 100 seconds through wet-mixing, slump flow test is 750mm, J ring slump flow test 730mm, and concrete contains
Tolerance is 15%, and 3 days intensity is 16.7MPa, and 28 days intensity is 42MPa.
Embodiment 2
Self-compacting concrete includes following components: use P.O 42.5 cement 150 parts, ground slag powder 30 parts, regenerative micro powder 30
Part, the rubble 200 parts of 5-10mm particle diameter, 10-15mm Stone 200 parts, 15-20mm rubble 400 parts, Machine-made Sand 200 part, day
So 650 parts of sand, 165 parts of water, shrinkage type polycarboxylate water-reducer and 1.6 parts of the mixture of naphthalene water reducer, nano-bentonite 10 parts,
Sodium lauryl sulphate 0.4 part, viscosifier 0.2 part, calcium stearate 1 part.Shrinkage type polycarboxylate water-reducer and naphthalene water reducer
In mixture, the mass ratio of shrinkage type polycarboxylate water-reducer and naphthalene water reducer is 1:3.5.60 parts of chemical gas generation agent, wherein, change
Foaming agent is aluminium powder.
The detailed description of the invention of the present invention, uses agitating device, by sand and cement, breeze, stone powder, rubble dry mixing 20 seconds
After, adding other component, then release after 100 seconds through wet-mixing, the divergence that falls is 710mm, J ring slump flow test 700mm, concrete
Air content is 18%, and 3 days intensity is 15MPa, and 28 days intensity is 32.5MPa.
Embodiment 3
Self-compacting concrete includes following components: use P.O 52.5 cement 100 parts, ground slag powder 150 parts, silica flour 20 parts,
The rubble of 5-10mm particle diameter 400 parts, 10-15mm Stone 200 parts, 15-20mm rubble 200 parts, natural sand 750 parts, water 160
Part, shrinkage type polycarboxylate water-reducer and 1.3 parts of the mixture of naphthalene water reducer, nano-bentonite 20 parts, rosin soap 0.5 part, increasing
Stick 0.3 part, calcium stearate 1 part.In the mixture of shrinkage type polycarboxylate water-reducer and naphthalene water reducer, shrinkage type polycarboxylic acids subtracts
The mass ratio of water preparation and naphthalene water reducer is 1:4.70 parts of chemical gas generation agent, wherein, chemical gas generation agent is hydrogenperoxide steam generator.
The detailed description of the invention of the present invention, uses agitating device, after sand and cement, breeze, rubble dry mixing 20 seconds, adds
Other component, then release after wet-mixing 100 seconds, slump flow test is 760mm, J ring slump flow test 760mm, concrete gassiness
Amount is 20%, and 3 days intensity is 28MPa, and 28 days intensity is 52MPa.
Embodiment 4
Self-compacting concrete includes following components: use P.O 52.5 cement 150 parts, metakaolin 20 parts, silica flour 10, breeze
100 parts, the rubble 400 parts of 5-10mm particle diameter, 10-15mm Stone 200 parts, 15-20mm rubble 200 parts, natural sand 750
Part, 160 parts of water, shrinkage type polycarboxylate water-reducer and 1 part of the mixture of naphthalene water reducer, nano-bentonite 50 parts, Colophonium hot polymerization
Thing 0.2 part, sodium lauryl sulphate 0.6 part, viscosifier 0.1 part, calcium stearate 2 parts.Shrinkage type polycarboxylate water-reducer and naphthalene system
In the mixture of water reducer, the mass ratio of shrinkage type polycarboxylate water-reducer and naphthalene water reducer is 1:3.80 parts of chemical gas generation agent, its
In, chemical gas generation agent is hydrogenperoxide steam generator.
The detailed description of the invention of the present invention, uses agitating device, by sand and cement, breeze, flyash, rubble dry mixing 20 seconds
After, adding other component, then release after 100 seconds through wet-mixing, slump flow test is 750mm, J ring slump flow test 760mm, coagulation
Soil air content is 25%, and 3 days intensity is 25MPa, and 28 days intensity is 48MPa.
Embodiment 5
Self-compacting concrete includes following components: use P.O 52.5 cement 100 parts, metakaolin 30 parts, 150 parts of flyash,
The rubble of 5-10mm particle diameter 400 parts, 10-15mm Stone 200 parts, 15-20mm rubble 200 parts, natural sand 800 parts, water 170
Part, shrinkage type polycarboxylate water-reducer and 1 part of the mixture of naphthalene water reducer, nano-bentonite 30 parts, colophonium pyrolytic polymer 0.4 part,
Viscosifier 0.05 part, calcium stearate 1 part.Shrinkage type polycarboxylic acids in the mixture of shrinkage type polycarboxylate water-reducer and naphthalene water reducer
The mass ratio of water reducer and naphthalene water reducer is 1:3.5.80 parts of chemical gas generation agent, wherein, chemical gas generation agent is that hydrogen peroxide is molten
Liquid.
The detailed description of the invention of the present invention, uses agitating device, by sand and cement, breeze, flyash, rubble dry mixing 20 seconds
After, adding other component, then release after 100 seconds through wet-mixing, slump flow test is 730mm, J ring slump flow test 730mm, coagulation
Soil air content is 15%, and 3 days intensity is 28MPa, and 28 days intensity is 49MPa.
Embodiment 6
Self-compacting concrete includes following components: use P.O 52.5 cement 150 parts, metakaolin 30 parts, 150 parts of flyash,
The rubble of 5-10mm particle diameter 400 parts, 10-15mm Stone 200 parts, 15-20mm rubble 200 parts, natural sand 800 parts, water 170
Part, shrinkage type polycarboxylate water-reducer and 1 part of the mixture of aliphatic water reducing agent, nano-bentonite 30 parts, colophonium pyrolytic polymer 0.4
Part, viscosifier 0.05 part, calcium stearate 1 part.Shrinkage type in the mixture of shrinkage type polycarboxylate water-reducer and aliphatic water reducing agent
The mass ratio of polycarboxylate water-reducer and aliphatic water reducing agent is 1:3.5.70 parts of chemical gas generation agent, wherein, chemical gas generation agent is aluminum
Powder.
The detailed description of the invention of the present invention, uses agitating device, by sand and cement, breeze, flyash, rubble dry mixing 20 seconds
After, adding other component, then release after 100 seconds through wet-mixing, slump flow test is 730mm, J ring slump flow test 740mm, coagulation
Soil air content is 20%, and 3 days intensity is 29MPa, and 28 days intensity is 49MPa.
Claims (10)
1. the self-compacting concrete for road engineering, it is characterised in that: include the component of following weight portion: 200 ~ 350
Part slurry, 400 ~ 550 parts of fine aggregates, 350 ~ 600 parts of coarse aggregates and 50-80 part chemical gas generation agent, described slurry includes following heavy
The component of amount part: 100 ~ 150 parts of cement, 20 ~ 100 parts of Binder Materials, 0.5 ~ 1 part of water reducer, 0 ~ 0.5 part of viscosifier, 5 ~ 10 parts
Water-retaining agent, 0.1 ~ 1 part of air entraining agent, 0 ~ 2 part of waterproofing agent and 80 ~ 100 parts of water,.
Self-compacting concrete for road engineering the most according to claim 1, it is characterised in that: described Binder Materials is
The combination of any one or more in flyash, ground slag powder, metakaolin, silica flour and regenerative micro powder.
Self-compacting concrete for road engineering the most according to claim 1, it is characterised in that: described water reducer is common
Poly-type water reducer and the mixture of condensation polymer type water reducer, described copoly type water reducer is shrinkage type polycarboxylate water-reducer, described contracting
Poly-type water reducer is one or both the combination in naphthalene water reducer and aliphatic water reducing agent.
Self-compacting concrete for road engineering the most according to claim 3, it is characterised in that: described copoly type diminishing
The weight ratio of agent and condensation polymer type water reducer is 1:3-4.
Self-compacting concrete for road engineering the most according to claim 1, it is characterised in that: described water-retaining agent is for receiving
Rice bentonite.
Self-compacting concrete for road engineering the most according to claim 1, it is characterised in that: described air entraining agent is pine
Perfume and the one or two in the maleic acid-copolymer of Polyethylene Glycol monoesters, rosin soap, colophonium pyrolytic polymer and sodium lauryl sulphate
The mixture planted.
Self-compacting concrete for road engineering the most according to claim 1, it is characterised in that: described chemical gas generation agent
For aluminium powder or hydrogenperoxide steam generator.
Self-compacting concrete for road engineering the most according to claim 1, it is characterised in that: described waterproofing agent is hard
Fat acid calcium.
Self-compacting concrete for road engineering the most according to claim 1, it is characterised in that: described coarse aggregate is sky
The stone that right or regeneration uses, the particle diameter of coarse aggregate is 5 ~ 31.5mm.
Self-compacting concrete for road engineering the most according to claim 1, it is characterised in that: described fine aggregate is
Any one or the mixture of any two kinds in river sand, fluvial sand, washing sea sand, Machine-made Sand, CHARACTERISTICS OF TAILINGS SAND and natural sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610380886.6A CN106045557A (en) | 2016-06-01 | 2016-06-01 | Self-compacting concrete for road engineering |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610380886.6A CN106045557A (en) | 2016-06-01 | 2016-06-01 | Self-compacting concrete for road engineering |
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| CN106045557A true CN106045557A (en) | 2016-10-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107337398A (en) * | 2017-03-07 | 2017-11-10 | 中交四航工程研究院有限公司 | A kind of box hat immersed tube lower shrinkage self-compacting concrete, its preparation method and application |
| CN107500650A (en) * | 2017-08-31 | 2017-12-22 | 河北建筑工程学院 | A kind of iron tailings sand self-compacting concrete and preparation method thereof |
| EP3647295A4 (en) * | 2017-06-29 | 2021-01-13 | Sumitomo Mitsui Construction Co., Ltd. | Concrete composition and production method therefor |
| CN116535160A (en) * | 2023-04-27 | 2023-08-04 | 金隅冀东(唐山)混凝土环保科技集团有限公司 | Self-compacting rubble concretion and preparation method and construction method thereof |
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| CN107337398A (en) * | 2017-03-07 | 2017-11-10 | 中交四航工程研究院有限公司 | A kind of box hat immersed tube lower shrinkage self-compacting concrete, its preparation method and application |
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| CN107500650A (en) * | 2017-08-31 | 2017-12-22 | 河北建筑工程学院 | A kind of iron tailings sand self-compacting concrete and preparation method thereof |
| CN116535160A (en) * | 2023-04-27 | 2023-08-04 | 金隅冀东(唐山)混凝土环保科技集团有限公司 | Self-compacting rubble concretion and preparation method and construction method thereof |
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Application publication date: 20161026 |