CN108947295A - Low-alkali concrete swelling agent and the preparation method and application thereof - Google Patents
Low-alkali concrete swelling agent and the preparation method and application thereof Download PDFInfo
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- CN108947295A CN108947295A CN201811062270.XA CN201811062270A CN108947295A CN 108947295 A CN108947295 A CN 108947295A CN 201811062270 A CN201811062270 A CN 201811062270A CN 108947295 A CN108947295 A CN 108947295A
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
-
- 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
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a kind of low-alkali concrete swelling agents and the preparation method and application thereof.The raw material of low-alkali concrete swelling agent includes: 20~50 mass parts of gypsum, 5~20 mass parts of 30~60 mass parts of composite fly ash, 5~10 mass parts of alunite and fine aggregate；Wherein, the raw material components of composite fly ash are in parts by mass, comprising: 55~65 mass parts of dolomite, 3~5 mass parts of lime slag, 15~20 mass parts of plant slag, 5~10 mass parts of 3~5 mass parts of flyash, 5~6 mass parts of boiler slag and deposed brick slag.For low-alkali concrete swelling agent provided by the invention as a kind of multi-functional, impervious cracking resistance product of high-performance antiseepage, major advantage includes: that expansion energy is big, later period contraction is small, concrete strength is high, alkali content is low, can especially resist sulfate attack；It maintains the leading position in the same industry as a new concrete anti-crack and anti-seepage swelling agent.
Description
Technical field
The present invention relates to building material technical fields, and in particular to a kind of low-alkali concrete swelling agent and preparation method thereof with
Using.
Background technique
It is well known that concrete is in pouring hardening process, it will usually generate volume contraction phenomenon.Due to shrinking, coagulation
Native inside can crack, to cause the decline of its intensity, impermeability, frost resistance and durability.It is mixed in normal concrete
Enter appropriate swelling agent, is in engineering using the method for controlling its crack and generating the most universal.
The volume expansion for being mainly characterized by generate appropriateness during maintenance of expansive concrete is having reinforcing bar and is facing position about
In the case where beam, certain tension stress can be generated to reinforcing bar, and this stress generates compression to concrete, thus mixed
Centainly chemical pre-stressed can be generated in solidifying soil.This chemical pre-stressed importing changes the stress state of concrete, makes it
The contraction of concrete can be substantially balanced out and generated tensile stress of creeping, so that reaching compensation shrinks and improve cracking resistance, impervious energy
The effect of power.The generation of distress in concrete is caused by the influence of extraneous factor mostly.In addition to load, mainly due to dehydration and drop
The damp and hot variation (increase and decrease and migration) of volume change caused by temperature and inside concrete.No matter volume caused by which kind of reason becomes
Change, lead to crack, but because dry and cracked caused by shrinking most commonly under restrictive condition.It is exactly with limitation item that compensation, which is shunk,
Expansion under part compensates this contraction, to reduce or remit the generation and development in crack.In recent years, it is ground with to concrete durability
That studies carefully deepens continuously, it is thus proposed that " alkali-aggregate reaction " is the new viewpoint for influencing concrete durability principal element, this is just to swollen
Swollen dose has been researched and proposed new project: containing alkali to some extent in previous various swelling agents, with pushing away for service life
It moving, the alkali in concrete reacts with active aggregates, destruction can be generated to concrete structure, and influence making for concrete
Use the service life.
Based on this, novel, efficient, the low alkali of one kind is developed, the cement expansive material of low-dosage is the task of top priority.
Summary of the invention
For the defects in the prior art, the present invention is intended to provide a kind of low-alkali concrete swelling agent and preparation method thereof with
Using.Low-alkali concrete swelling agent provided by the invention is main excellent as a kind of multi-functional, impervious cracking resistance product of high-performance antiseepage
Point includes: that expansion energy is big, later period contraction is small, concrete strength is high, alkali content is low, can especially resist sulfate attack；Its
As a new concrete anti-crack and anti-seepage swelling agent, maintain the leading position in the same industry.In addition, low-alkali concrete of the present invention
Swelling agent can be widely applied for buried concrete waterproof, basement, underground parking, subterranean railway, highway, tunnel, water conservancy
Facility, swimming pool, pond, water tower, storage tank, roof waterproof are poured after column beam joint, pipe joint, concrete, industrial and civilian
Building etc. have waterproof, antiseepage, seepage resistance demand concrete works.
For this purpose, the invention provides the following technical scheme:
In a first aspect, the present invention provides a kind of low-alkali concrete swelling agent, raw material components are in parts by mass, comprising: gypsum
20~50 mass parts, 5~20 mass parts of 30~60 mass parts of composite fly ash, 5~10 mass parts of alunite and fine aggregate；Its
In, the raw material components of composite fly ash are in parts by mass, comprising: 55~65 mass parts of dolomite, 3~5 mass parts of lime slag, electricity
15~20 mass parts of factory's clinker, 5~10 mass parts of 3~5 mass parts of flyash, 5~6 mass parts of boiler slag and deposed brick slag.
Preferably, the raw material components of cement expansive material further include 5~8 mass of 1~3 mass parts of yttrium oxide and bentonite
Part.
Preferably, low-alkali concrete swelling agent, raw material components are in parts by mass, comprising: 30~50 mass parts of gypsum, compound
30~50 mass parts of flyash, 5~8 mass parts of alunite, 10~15 mass parts of fine aggregate, 1~2 mass parts of yttrium oxide and swelling
Native 5~8 mass parts.
Preferably, gypsum is selected from one of dihydrate gypsum, semi-hydrated gypsum and anhydrite or a variety of；It is preferred that anhydrite.
Preparing low-alkali concrete swelling agent of the present invention is according to mass parts as matching, can be according to corresponding ratio in production
Example increase or reduce, as large-scale production can by kilogram or as unit of ton, small-scale production can also in grams, and quality can
To increase or reduce, but the quality proportioning constant rate between each composition.
Second aspect, the present invention provide a kind of preparation method of low-alkali concrete swelling agent, comprising the following steps: S1: will
Each raw material component accurate weighing in proportion, crushes later；S2: smashed each raw material component is stirred evenly, is fired into later
Clinker；Clinker is successively handled through supercooling, grinding and homogenizing, low-alkali concrete swelling agent is obtained.
Preferably, in S1: each raw material component being crushed to 80 μm of square hole screens and is tailed over less than 8.0%.
The third aspect, low-alkali concrete swelling agent provided by the invention is in buried concrete waterproof, basement, underground parking
Field, subterranean railway, highway, tunnel, water conservancy projects, swimming pool, pond, water tower, storage tank, roof waterproof, column beam joint, pipeline connect
Head, after concrete casting, industry and civil buildings etc. have waterproof, antiseepage, seepage resistance demand concrete works in application.
Preferably, low-alkali concrete swelling agent is stirred evenly with cementitious material；Wherein, the use of low-alkali concrete swelling agent
Amount is the 8~10% of binder total amount.
Specifically, the concrete of low-alkali concrete swelling agent of the present invention is mixed, the metering of match ratio is accurate, and mixing time is wanted
Extend 30~60 seconds than normal concrete；In addition, most attach most importance to sufficient moisture-keeping maintaining to give full play to its expansion performance in due course
It wants, after concrete casting, 2 hours beginning water seasonings generally after final set, curing period is 7~14 days.It must make concrete table
Face keeps moist, and wall should hang gunnysack moisturizing or sprinkling water curing；And can according to the requirement of construction and temperature and concrete strength grade,
It is configured to slow setting, non-irrigated strong, diminishing, the pumping types swelling agent such as impervious, high-performance.
Above-mentioned technical proposal provided by the invention has the advantage that
(1) applicant has found by numerous studies: low-alkali concrete swelling agent provided by the invention as it is a kind of it is multi-functional,
The impervious cracking resistance product of high-performance antiseepage, major advantage include: that expansion energy is big, later period contraction is small, concrete strength is high, alkali content
It is low, it can especially resist sulfate attack；It is as a new concrete anti-crack and anti-seepage swelling agent, in neck in the same industry
First status.In addition, low-alkali concrete swelling agent of the present invention can be widely applied for buried concrete waterproof, basement, underground are stopped
Parking lot, subterranean railway, highway, tunnel, water conservancy projects, swimming pool, pond, water tower, storage tank, roof waterproof, column beam joint, pipeline
Be poured after connector, concrete, industry and civil buildings etc. have waterproof, antiseepage, seepage resistance demand concrete works.
(2) applicant has found after creative work: the necessary cracking resistance of antiseepage, and cracking resistance ability antiseepage is not permeable without splitting, whole
Body waterproof effect is not necessarily the seepage-resistant grade of concrete itself, and be can cracking resistance, therefore, cracking resistance is more attached most importance to than impervious
It wants.The shrinkage cracking problem for solving concrete, compensating concrete to shrink, and inhibits cracking, has swelling agent only up to purpose.
(3) volume of low-alkali concrete swelling agent of the present invention is the 8~10% of binder total amount；It is with expansion rate
Greatly, drying shrinkage is small, alkali content is low (0.1~0.4%), corrosion-resistant property is good, the heat of hydration is low, concrete strength is high, slump-loss
The advantages that small, cold and hot stability is good.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Specific embodiment
The embodiment of technical solution of the present invention will be described in detail below.Following embodiment is only used for clearer
Illustrate technical solution of the present invention, therefore be only used as example, and not intended to limit the protection scope of the present invention.
Experimental method in following embodiments is unless otherwise specified conventional method.Examination as used in the following examples
Material is tested, is to be commercially available from conventional reagent shop unless otherwise specified.Quantitative test in following embodiment, is all provided with
Three repeated experiments are set, data are the average value or mean+SD of three repeated experiments.
The present invention provides a kind of low-alkali concrete swelling agent, and raw material components are in parts by mass, comprising: 20~50 mass of gypsum
Part, 5~20 mass parts of 30~60 mass parts of composite fly ash, 5~10 mass parts of alunite and fine aggregate；Wherein, compound fine coal
The raw material components of ash are in parts by mass, comprising: and 55~65 mass parts of dolomite, 3~5 mass parts of lime slag, plant slag 15~
20 mass parts, 5~10 mass parts of 3~5 mass parts of flyash, 5~6 mass parts of boiler slag and deposed brick slag；Gypsum is selected from two water
One of gypsum, semi-hydrated gypsum and anhydrite are a variety of；It is preferred that anhydrite.
In further embodiment of the invention, the raw material components of cement expansive material further include 1~3 mass of yttrium oxide
Part and 5~8 mass parts of bentonite.
In addition, being directed to low-alkali concrete swelling agent provided by the invention, applicant specially provides preparation method, including with
Lower step:
S1: by each raw material component accurate weighing in proportion, it is crushed to 80 μm of square hole screens later and tails over less than 8.0%.
S2: smashed each raw material component is stirred evenly, fires ripe material later；By clinker successively through supercooling, powder
Mill and homogenizing processing, obtain low-alkali concrete swelling agent.
It is illustrated With reference to embodiment:
Embodiment one
The present embodiment provides a kind of present invention to provide a kind of low-alkali concrete swelling agent, and raw material components in parts by mass, wrap
It includes: 50 mass parts of anhydrite, 10 mass parts of 30 mass parts of composite fly ash, 8 mass parts of alunite and fine aggregate；Wherein, compound
The raw material components of flyash are in parts by mass, comprising: 55 mass parts of dolomite, 5 mass parts of lime slag, 15 mass of plant slag
Part, 10 mass parts of 5 mass parts of flyash, 5 mass parts of boiler slag and deposed brick slag.
Low-alkali concrete swelling agent is prepared using above-mentioned raw materials component, comprising the following steps:
S1: by each raw material component accurate weighing in proportion, it is crushed to 80 μm of square hole screens later and tails over less than 8.0%.
S2: smashed each raw material component is stirred evenly, fires ripe material later；By clinker successively through supercooling, powder
Mill and homogenizing processing, obtain low-alkali concrete swelling agent.
Embodiment two
The present embodiment provides a kind of present invention to provide a kind of low-alkali concrete swelling agent, and raw material components in parts by mass, wrap
It includes: 30 mass parts of anhydrite, 15 mass parts of 50 mass parts of composite fly ash, 5 mass parts of alunite and fine aggregate；Wherein, compound
The raw material components of flyash are in parts by mass, comprising: 65 mass parts of dolomite, 3 mass parts of lime slag, 20 mass of plant slag
Part, 5 mass parts of 3 mass parts of flyash, 6 mass parts of boiler slag and deposed brick slag.
Low-alkali concrete swelling agent is prepared using above-mentioned raw materials component, comprising the following steps:
S1: by each raw material component accurate weighing in proportion, it is crushed to 80 μm of square hole screens later and tails over less than 8.0%.
S2: smashed each raw material component is stirred evenly, fires ripe material later；By clinker successively through supercooling, powder
Mill and homogenizing processing, obtain low-alkali concrete swelling agent.
Embodiment three
The present embodiment provides a kind of present invention to provide a kind of low-alkali concrete swelling agent, and raw material components in parts by mass, wrap
It includes: 50 mass parts of anhydrite, 30 mass parts of composite fly ash, 8 mass parts of alunite, 1 mass parts of yttrium oxide, 6 mass of bentonite
Part and 10 mass parts of fine aggregate；Wherein, the raw material components of composite fly ash are in parts by mass, comprising: 55 mass parts of dolomite, stone
5 mass parts of lime-ash, 15 mass parts of plant slag, 10 mass parts of 5 mass parts of flyash, 5 mass parts of boiler slag and deposed brick slag.
Low-alkali concrete swelling agent is prepared using above-mentioned raw materials component, comprising the following steps:
S1: by each raw material component accurate weighing in proportion, it is crushed to 80 μm of square hole screens later and tails over less than 8.0%.
S2: smashed each raw material component is stirred evenly, fires ripe material later；By clinker successively through supercooling, powder
Mill and homogenizing processing, obtain low-alkali concrete swelling agent.
Comparative example
This comparative example provides a kind of low-alkali concrete swelling agent, and raw material components are in parts by mass, comprising: 50 mass of anhydrite
Part, 30 mass parts of composite fly ash, 10 mass parts of 8 mass parts of alunite, 6 mass parts of bentonite and fine aggregate；Wherein, composite powder
The raw material components of coal ash are in parts by mass, comprising: 55 mass parts of dolomite, 5 mass parts of lime slag, 15 mass parts of plant slag,
10 mass parts of 5 mass parts of flyash, 5 mass parts of boiler slag and deposed brick slag.
Low-alkali concrete swelling agent is prepared using above-mentioned raw materials component, comprising the following steps:
S1: by each raw material component accurate weighing in proportion, it is crushed to 80 μm of square hole screens later and tails over less than 8.0%.
S2: smashed each raw material component is stirred evenly, fires ripe material later；By clinker successively through supercooling, powder
Mill and homogenizing processing, obtain low-alkali concrete swelling agent.
In addition, each embodiment and comparative example is prepared in order to preferably evaluate the advantage of technical solution of the present invention
Low-alkali concrete swelling agent and commercially available cementitious material are stirred evenly according to the ratio of 8:100, obtain concrete；Performance is carried out later
Evaluation, specific data are as shown in table 1.
The performance data list of each embodiment and comparative example concrete of table 1
| Expansive agent dosage | 7d flexural strength/MPa | 28d flexural strength/MPa | |
| Embodiment one | 9% | 32.9 | 54.0 |
| Embodiment two | 9% | 33.1 | 55.5 |
| Embodiment three | 9% | 36.8 | 59.0 |
| Comparative example | 9% | 27.5 | 30.3 |
Certainly, the case where being enumerated in addition to embodiment one to embodiment three, parameter, raw material components in other treatment processes
Weight percent etc. is also possible.
Low-alkali concrete swelling agent provided by the invention is main as a kind of multi-functional, impervious cracking resistance product of high-performance antiseepage
Wanting advantage includes: that expansion energy is big, later period contraction is small, concrete strength is high, alkali content is low, can especially resist sulfuric acid salt contamination
Erosion；It maintains the leading position in the same industry as a new concrete anti-crack and anti-seepage swelling agent.In addition, the low alkali of the present invention
Cement expansive material can be widely applied for buried concrete waterproof, basement, underground parking, subterranean railway, highway, tunnel
Road, water conservancy projects, swimming pool, pond, water tower, storage tank, roof waterproof are poured after column beam joint, pipe joint, concrete, work
Industry and civil buildings etc. have waterproof, antiseepage, seepage resistance demand concrete works.
In the description of the present invention, it is to be understood that, term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indication or suggestion relative importance or implicitly indicates the quantity of indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include one or more of the features.In the description of the present invention,
The meaning of " plurality " is two or more, unless otherwise specifically defined.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (8)
1. a kind of low-alkali concrete swelling agent, which is characterized in that raw material components are in parts by mass, comprising:
20~50 mass parts of gypsum, 5~20 matter of 30~60 mass parts of composite fly ash, 5~10 mass parts of alunite and fine aggregate
Measure part；
Wherein, the raw material components of the composite fly ash are in parts by mass, comprising: and 55~65 mass parts of dolomite, lime slag 3~
5 mass parts, 15~20 mass parts of plant slag, 3~5 mass parts of flyash, 5~6 mass parts of boiler slag and deposed brick slag 5~10
Mass parts.
2. low-alkali concrete swelling agent according to claim 1, it is characterised in that:
The raw material components of the cement expansive material further include 5~8 mass parts of 1~3 mass parts of yttrium oxide and bentonite.
3. low-alkali concrete swelling agent according to claim 2, it is characterised in that:
30~50 mass parts of gypsum, 30~50 mass parts of composite fly ash, 5~8 mass parts of alunite, 10~15 mass of fine aggregate
Part, 5~8 mass parts of 1~2 mass parts of yttrium oxide and bentonite.
4. described in any item low-alkali concrete swelling agents according to claim 1~3, it is characterised in that:
The gypsum is selected from one of dihydrate gypsum, semi-hydrated gypsum and anhydrite or a variety of；It is preferred that anhydrite.
5. the preparation method of any one of Claims 1 to 4 low-alkali concrete swelling agent, which is characterized in that including following step
It is rapid:
S1: each raw material component accurate weighing in proportion crushes later；
S2: smashed each raw material component is stirred evenly, fires ripe material later；By the clinker successively through supercooling, powder
Mill and homogenizing processing, obtain the low-alkali concrete swelling agent.
6. the preparation method of low-alkali concrete swelling agent according to claim 5, it is characterised in that:
In the S1: each raw material component being crushed to 80 μm of square hole screens and is tailed over less than 8.0%.
7. any one of Claims 1 to 4 low-alkali concrete swelling agent is in buried concrete waterproof, basement, underground parking
Field, subterranean railway, highway, tunnel, water conservancy projects, swimming pool, pond, water tower, storage tank, roof waterproof, column beam joint, pipeline connect
Head, after concrete casting, industry and civil buildings etc. have waterproof, antiseepage, seepage resistance demand concrete works in application.
8. application according to claim 7, it is characterised in that:
The low-alkali concrete swelling agent is used after mixing evenly with cementitious material；Wherein, the low-alkali concrete swelling agent
Dosage be the binder total amount 8~10%.
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| CN112441806A (en) * | 2020-11-27 | 2021-03-05 | 苏家群 | Anti-permeability and anti-crack concrete for traffic engineering construction and preparation method thereof |
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| CN109776009A (en) * | 2019-03-22 | 2019-05-21 | 吉林建筑大学 | One kind is exempted to calcine complex mineral swelling agent |
| CN109776009B (en) * | 2019-03-22 | 2023-10-13 | 吉林建筑大学 | Calcination-free composite mineral expanding agent |
| CN112441806A (en) * | 2020-11-27 | 2021-03-05 | 苏家群 | Anti-permeability and anti-crack concrete for traffic engineering construction and preparation method thereof |
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