CN108529999A - A kind of crack resistence concrete and preparation method thereof - Google Patents
A kind of crack resistence concrete and preparation method thereof Download PDFInfo
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- CN108529999A CN108529999A CN201810767788.7A CN201810767788A CN108529999A CN 108529999 A CN108529999 A CN 108529999A CN 201810767788 A CN201810767788 A CN 201810767788A CN 108529999 A CN108529999 A CN 108529999A
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- cement
- cracking resistance
- sand
- concrete
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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
- C04B28/06—Aluminous 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
Abstract
The present invention relates to building material technical field, especially a kind of crack resistence concrete and preparation method thereof, includes being made of the raw material of following weight proportion：Cement：320 380 parts, stone：960 1140 parts, sand：390 460 parts, flyash：100 130 parts, water：130 160 parts, cracking resistance swelling agent：35 40 parts, Grace fiber：0.45 0.55 parts, cold drawing stainless steel fibre：0.35 0.45 parts.The present invention is that raw material passes through effective proportioning of each raw material and mixing with cement, stone and cracking resistance swelling agent etc., the phenomenon that surface and internal fissure caused by the unstructuredness reason such as concrete temperature, the heat of hydration and drying shrinkage can be effectively prevented, the Grace fiber and cold drawing stainless steel fibre being added in concrete can play traction action in inside concrete, further increase the toughness and intensity of concrete.
Description
Technical field
The present invention relates to building material technical fields more particularly to a kind of crack resistence concrete and preparation method thereof.
Background technology
Along with the fast development of China's economy, symbol of many Super Highs as a city, in building construction
The proportion occupied is increasing.In Super High construction, rational quality assurance measure is direct in big underplate concrete casting process
Affect the construction quality of big bottom plate.Concrete, referred to as " concrete (t ó ng) "：Refer to will be gathered materials by cementitious material it is cementing integral
Engineered composite material general designation.One word of concrete usually said refers to making cementitious material with cement, and sand, masonry gather materials;With water
(can contain additive and admixture) coordinates by a certain percentage, it is agitated obtained by cement concrete, also referred to as normal concrete, it is wide
It is general to be applied to civil engineering.
Concrete is a kind of mixture being made of a variety of materials, and is a kind of fragile material again, in hydration heat of cement, interior
Under the action of outer difference variation, autogenous shrinkage, it may appear that the possibility in crack, and in the prior art the preparation of concrete simply by
Cement, sand, stone, water and water-reducing agent are mixed with, such concrete easy tos produce crack after pouring, and mixes
The anti crack performance for coagulating soil is relatively low, cannot be satisfied the demand of certain special construction fields, especially mass concrete, exists in this way
Serious security risk.
Invention content
The purpose of the present invention is to solve concrete in the prior art, and crack is easy tod produce after pouring, concrete
The relatively low disadvantage of anti crack performance, and a kind of crack resistence concrete and preparation method thereof proposed.
To achieve the goals above, present invention employs following technical solutions：
A kind of crack resistence concrete is designed, includes being made of the raw material of following weight proportion：Cement：320-380 parts, stone：
960-1140 parts, sand：390-460 parts, flyash：100-130 parts, water：130-160 parts, cracking resistance swelling agent：35-40 parts, Gray
This fiber：0.45-0.55 parts, cold drawing stainless steel fibre：0.35-0.45 parts.
Preferably, it is made of the raw material of following weight proportion：Cement：320 parts, stone：960 parts, sand：390 parts, fine coal
Ash：100 parts, water：130 parts, cracking resistance swelling agent：35 parts, Grace fiber：0.45 part, cold drawing stainless steel fibre：0.35 part.
Preferably, it is made of the raw material of following weight proportion：Cement：380 parts, stone：1140 parts, sand：460 parts, fine coal
Ash：130 parts, water：160 parts, cracking resistance swelling agent：40 parts, Grace fiber：0.55 part, cold drawing stainless steel fibre：0.45 part.
Preferably, the aquation of the cement, 7d require configuration to be not more than 250KJ/kg3.
Preferably, sand is Machine-made Sand.
Preferably, cement using tetra calcium aluminoferrite content is high and cement or early strength that tricalcium aluminate content is low are relatively low,
The higher cement of later strength growth rate.
Preferably, the preparation method of the cracking resistance swelling agent is：
1）The preparation of calcium oxide expansive clinker：By the agstone of the 35-45 of 50-75 parts of alumina and CaO content >=55% parts
It wears into raw meal powder of the specific surface area not less than 450m2/kg and calcines 30-60min by 1550 DEG C -1650 DEG C in rotary kiln；
2）The preparation of high alumina fine powder material：It uses by 1400 DEG C of -1600 DEG C of high-temperature calcinations and alumina content is the height of 45-55%
Aluminium clinker object grinding is to 200-300 mesh；
3）By calcium oxide expansive clinker and high alumina fine powder material with 2:3 ratio is uniformly mixed with ultrasonic stirrer；
4）Above-mentioned 3）Slag powders, water-reducing agent and stearic acid are sequentially added into ultrasonic stirrer after stirring 30min（Ratio is
1：1：2）, continue to stir 45min.
Preferably, the water-reducing agent be spent pulping liquor, one kind in water-reducing agent made of reed pulp waste liquid or wood pulp waste liquor or
The a variety of mixing of person.
Preferably, include the following steps：
1）The preparation of cracking resistance swelling agent；
2）Flyash, Grace fiber and cold drawing stainless steel fibre are uniformly mixed by ultrasonic stirrer；
3）Sand and stone are dried to moisture content below 0.5%；
4）Cement, stone, sand and water are put into blender and stirs 10min, then put into flyash, Grace fiber and cold drawing not
The mixture and cracking resistance swelling agent of rust steel fibre continue to stir 30min；
5）Concrete batching system is fitted into preprepared cracking resistance die trial for two layers with scuppit point,
Every layer of charging thickness is roughly equal, is equably plugged and pounded with tamper, and it is at least many by every 10000 square centimeters to plug and pound number
In 12 times, wherein the outer diameter of mold is 370 ± 1mm；Interior warp is 300 ± 1mm；A height of 140 ± 1mm；
6）The cracking resistance die trial of forming is put into form removal after maintenance 7d in the environment that temperature is 20 ± 2 degree.
Preferably, when the diameter of the rubble is between 5-25mm, clay content needs to control within 1.5%.
A kind of crack resistence concrete proposed by the present invention and preparation method thereof, advantageous effect is：The present invention is with cement, stone
Son and cracking resistance swelling agent etc. by effective proportioning of each raw material of concrete and mix for raw material, can be effectively prevented because of concrete
The phenomenon that surface caused by the unstructuredness reason such as temperature, the heat of hydration and drying shrinkage and internal fissure, the Gray being added in concrete
This fiber and cold drawing stainless steel fibre can play traction action in inside concrete, further increase concrete toughness and
Intensity.
Specific implementation mode
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, tie below
Specific embodiment is closed, the present invention is further explained, but following embodiments are only the preferred embodiment of the present invention, and not all.
Based on the implementation example in the implementation mode, those skilled in the art's obtained other realities without making creative work
Example is applied, protection scope of the present invention is belonged to.Experimental method in following embodiments is unless otherwise specified conventional method,
The materials, reagents and the like used in the following examples is commercially available unless otherwise specified.
Embodiment 1
A kind of crack resistence preparation method of concrete, is as follows：
S1:Include being made of the raw material of following weight proportion：Cement：380 parts, stone：1140 parts, sand：460 parts, flyash：
130 parts, water：160 parts, cracking resistance swelling agent：40 parts, Grace fiber：0.55 part, cold drawing stainless steel fibre：0.45 part；
S2:The flyash taken, Grace fiber and cold drawing stainless steel fibre are uniformly mixed by ultrasonic stirrer；Again to
Cement, stone, sand and water are put into blender and stirs 10min, then put into flyash, Grace fiber and cold drawing stainless steel fibre
Mixture and cracking resistance swelling agent, continue stir 30min；By concrete batching system two layers of loading preprepared of scuppit point
In die trial, every layer of charging thickness is roughly equal, is equably plugged and pounded with tamper, plugs and pounds number by every 10000 square centimeters at least
No less than 12 times, the wherein outer diameter of mold is 370 ± 1mm；Interior warp is 300 ± 1mm；A height of 140 ± 1mm, by the anti-of forming
It splits die trial and is put into form removal after maintenance 7d in the environment that temperature is 20 ± 2 degree, it is 30 that the cracking resistance test specimen after form removal, which is immediately placed in temperature,
± 2 degree, relative humidity be（50±5）In the environment of %, and coats silica gel in test specimen top surface and be sealed processing.With deformeter or
Whether there is crack generation on amplification sem observation ring facade, and records the time of crack generation.
Embodiment 2
A kind of crack resistence preparation method of concrete, is as follows：
S1:Include being made of the raw material of following weight proportion：Cement：320 parts, stone：960 parts, sand：390 parts, flyash：100
Part, water：130 parts, cracking resistance swelling agent：35 parts, Grace fiber：0.45 part, cold drawing stainless steel fibre：0.35 part.
S2:The flyash taken, Grace fiber and cold drawing stainless steel fibre are uniformly mixed by ultrasonic stirrer；
Cement, stone, sand and water are put into blender again and stirs 10min, then put into flyash, Grace fiber and cold drawing stainless steel
The mixture and cracking resistance swelling agent of fiber continue to stir 30min；Concrete batching system is packed into preparation in advance two layers with scuppit point
In good die trial, every layer of charging thickness is roughly equal, is equably plugged and pounded with tamper, plugs and pounds number by every 10000 square centimeters
It is at least no less than 12 times, the wherein outer diameter of mold is 370 ± 1mm；Interior warp is 300 ± 1mm；A height of 140 ± 1mm, by forming
Cracking resistance die trial to be put into temperature be that form removal after 7d is conserved in 20 ± 2 degree of environment, the cracking resistance test specimen after form removal is immediately placed in temperature
It is for 30 ± 2 degree, relative humidity（50±5）In the environment of %, and coats silica gel in test specimen top surface and be sealed processing.With strain
Whether there is crack generation on instrument or amplification sem observation ring facade, and records the time of crack generation.
Embodiment 3
A kind of crack resistence concrete and preparation method thereof, is as follows：
S1:Include being made of the raw material of following weight proportion：Cement：350 parts, stone：1000 parts, sand：420 parts, flyash：
115 parts, water：140 parts, cracking resistance swelling agent：38 parts, Grace fiber：0.50 part, cold drawing stainless steel fibre：0.40 part.
S2:The flyash taken, Grace fiber and cold drawing stainless steel fibre are uniformly mixed by ultrasonic stirrer；
Cement, stone, sand and water are put into blender again and stirs 10min, then put into flyash, Grace fiber and cold drawing stainless steel
The mixture and cracking resistance swelling agent of fiber continue to stir 30min；Concrete batching system is packed into preparation in advance two layers with scuppit point
In good die trial, every layer of charging thickness is roughly equal, is equably plugged and pounded with tamper, plugs and pounds number by every 10000 square centimeters
It is at least no less than 12 times, the wherein outer diameter of mold is 370 ± 1mm；Interior warp is 300 ± 1mm；A height of 140 ± 1mm, by forming
Cracking resistance die trial to be put into temperature be that form removal after 7d is conserved in 20 ± 2 degree of environment, the cracking resistance test specimen after form removal is immediately placed in temperature
It is for 30 ± 2 degree, relative humidity（50±5）In the environment of %, and coats silica gel in test specimen top surface and be sealed processing.With strain
Whether there is crack generation on instrument or amplification sem observation ring facade, and records the time of crack generation.
Embodiment 4
A kind of crack resistence concrete and preparation method thereof, is as follows：
S1:Include being made of the raw material of following weight proportion：Cement：350 parts, stone：1000 parts, sand：420 parts, flyash：
115 parts, water：140 parts, Grace fiber：0.50 part, cold drawing stainless steel fibre：0.40 part.
S2:The flyash taken, Grace fiber and cold drawing stainless steel fibre are uniformly mixed by ultrasonic stirrer；
Cement, stone, sand and water are put into blender again and stirs 40min, and concrete batching system is packed into advance for two layers with scuppit point
In ready die trial, every layer of charging thickness is roughly equal, is equably plugged and pounded with tamper, plugs and pounds number by every 10000 squares
It centimetre is at least no less than 12 times, the wherein outer diameter of mold is 370 ± 1mm；Interior warp is 300 ± 1mm；A height of 140 ± 1mm, will be at
The good cracking resistance die trial of type is put into form removal after maintenance 7d, the cracking resistance test specimen after form removal in the environment that temperature is 20 ± 2 degree and is immediately placed in
Temperature is 30 ± 2 degree, relative humidity is（50±5）In the environment of %, and coats silica gel in test specimen top surface and be sealed processing.With
Whether there is crack generation on deformeter or amplification sem observation ring facade, and records the time of crack generation.
Below by above 4 groups of experimental record data statistics, following table is obtained：
It being shown according to the above results, it to be crack occur in the time that embodiment 1, embodiment 2 and embodiment 3 were conserved at 28 days,
And there is crack when conserving the 15th day in the embodiment 4 that cracking resistance swelling agent is not added.
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of crack resistence concrete, it is characterised in that：It is made of the raw material of following weight proportion：Cement：320-380 parts, stone
Son：960-1140 parts, sand：390-460 parts, flyash：100-130 parts, water：130-160 parts, cracking resistance swelling agent：35-40 parts,
Grace fiber：0.45-0.55 parts, cold drawing stainless steel fibre：0.35-0.45 parts.
2. a kind of crack resistence concrete according to claim 1, it is characterised in that：By the raw material system of following weight proportion
At：Cement：320 parts, stone：960 parts, sand：390 parts, flyash：100 parts, water：130 parts, cracking resistance swelling agent：35 parts, Gray
This fiber：0.45 part, cold drawing stainless steel fibre：0.35 part.
3. a kind of crack resistence concrete according to claim 1, it is characterised in that：By the raw material system of following weight proportion
At：Cement：380 parts, stone：1140 parts, sand：460 parts, flyash：130 parts, water：160 parts, cracking resistance swelling agent：40 parts, Gray
This fiber：0.55 part, cold drawing stainless steel fibre：0.45 part.
4. a kind of crack resistence concrete according to claim 1, it is characterised in that：The aquation of the cement, 7d require to match
It sets and is not more than 250KJ/kg3。
5. a kind of crack resistence concrete according to claim 1, it is characterised in that：The sand is Machine-made Sand.
6. a kind of crack resistence concrete according to claim 1, it is characterised in that：The cement is contained using tetra calcium aluminoferrite
It is relatively low to measure cement or early strength high and that tricalcium aluminate content is low, the higher cement of later strength growth rate.
7. a kind of crack resistence concrete according to claim 1, it is characterised in that：The preparation method of the cracking resistance swelling agent
For：
1）The preparation of calcium oxide expansive clinker：By the agstone of the 35-45 of 50-75 parts of alumina and CaO content >=55% parts
It wears into raw meal powder of the specific surface area not less than 450m2/kg and calcines 30-60min by 1550 DEG C -1650 DEG C in rotary kiln；
2）The preparation of high alumina fine powder material：It uses by 1400 DEG C of -1600 DEG C of high-temperature calcinations and alumina content is the height of 45-55%
Aluminium clinker object grinding is to 200-300 mesh；
3）By calcium oxide expansive clinker and high alumina fine powder material with 2:3 ratio is uniformly mixed with ultrasonic stirrer；
4）Above-mentioned 3）Slag powders, water-reducing agent and stearic acid are sequentially added into ultrasonic stirrer after stirring 30min（Ratio is
1：1：2）, continue to stir 45min.
8. a kind of crack resistence concrete according to claim 7, it is characterised in that：The water-reducing agent is spent pulping liquor, reed
One or more of water-reducing agent made of pulp waste or wood pulp waste liquor mixes.
9. according to a kind of preparation method of crack resistence concrete of claim 1-8 any one of them, it is characterised in that：Specific packet
Include following steps：
1）The preparation of cracking resistance swelling agent；
2）Flyash, Grace fiber and cold drawing stainless steel fibre are uniformly mixed by ultrasonic stirrer；
3）Sand and stone are dried to moisture content below 0.5%；
4）Cement, stone, sand and water are put into blender and stirs 10min, then put into flyash, Grace fiber and cold drawing not
The mixture and cracking resistance swelling agent of rust steel fibre continue to stir 30min；
5）Concrete batching system is fitted into preprepared die trial for two layers with scuppit point, every layer of charging thickness substantially phase
Deng equably being plugged and pounded with tamper, plug and pound number is at least no less than 12 times by every 10000 square centimeters, and the outer diameter of wherein mold is
370±1mm；Interior warp is 300 ± 1mm；A height of 140 ± 1mm；
6）The cracking resistance die trial of forming is put into form removal after maintenance 7d in the environment that temperature is 20 ± 2 degree；
10. preparation method according to claim 9, it is characterised in that：When the diameter of the rubble is between 5-25mm, contain
Mud amount needs to control within 1.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810767788.7A CN108529999A (en) | 2018-07-13 | 2018-07-13 | A kind of crack resistence concrete and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810767788.7A CN108529999A (en) | 2018-07-13 | 2018-07-13 | A kind of crack resistence concrete and preparation method thereof |
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| CN108529999A true CN108529999A (en) | 2018-09-14 |
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| CN201810767788.7A Pending CN108529999A (en) | 2018-07-13 | 2018-07-13 | A kind of crack resistence concrete and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114620971A (en) * | 2022-02-14 | 2022-06-14 | 新沂市新南环保产业技术研究院有限公司 | Concrete containing silica fume and preparation equipment thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496869A (en) * | 2013-09-26 | 2014-01-08 | 中铁十五局集团有限公司 | Expansive agent for preventing concrete from cracking |
| CN107337405A (en) * | 2017-06-30 | 2017-11-10 | 武汉理工大学 | A kind of high-performance for wet seam expands hybrid fiber concrete material and preparation method thereof |
-
2018
- 2018-07-13 CN CN201810767788.7A patent/CN108529999A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496869A (en) * | 2013-09-26 | 2014-01-08 | 中铁十五局集团有限公司 | Expansive agent for preventing concrete from cracking |
| CN107337405A (en) * | 2017-06-30 | 2017-11-10 | 武汉理工大学 | A kind of high-performance for wet seam expands hybrid fiber concrete material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 倪文杰: "《简明物资词典》", 30 April 1988, 水利电力出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114620971A (en) * | 2022-02-14 | 2022-06-14 | 新沂市新南环保产业技术研究院有限公司 | Concrete containing silica fume and preparation equipment thereof |
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| CB03 | Change of inventor or designer information | ||
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Inventor after: Lu Min Inventor after: Dai Dielun Inventor before: Lu Min Inventor before: Dai Yilun |
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Application publication date: 20180914 |