CN107304118A - A kind of subway engineering suppression chlorine ion binding capacity C40 special concrete compound methods - Google Patents
A kind of subway engineering suppression chlorine ion binding capacity C40 special concrete compound methods Download PDFInfo
- Publication number
- CN107304118A CN107304118A CN201610245184.7A CN201610245184A CN107304118A CN 107304118 A CN107304118 A CN 107304118A CN 201610245184 A CN201610245184 A CN 201610245184A CN 107304118 A CN107304118 A CN 107304118A
- Authority
- CN
- China
- Prior art keywords
- concrete
- water
- coarse aggregate
- additive
- binding capacity
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/26—Corrosion of reinforcement resistance
-
- 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
- C04B2111/74—Underwater applications
Abstract
The invention discloses a kind of subway engineering with chlorine ion binding capacity C40 special concrete compound methods are suppressed, mainly it is made up of cementitious material system, fine aggregate, coarse aggregate, additive；Design unit weight is 2400kg/m3；The technical parameter of the concrete is that water-cement ratio is 0.34 0.38, and sand coarse aggregate ratio is 34% 39%；The advantage of the invention is that：Production method is simple, and cost performance is higher, can preferably promote.
Description
Technical field
The present invention relates to a kind of special concrete, specifically a kind of subway engineering belongs to special concrete field with chlorine ion binding capacity C40 special concrete compound methods are suppressed.
Background technology
The agent structure of railway traffic engineering is often in away from the earth's surface stratum strong compared with deep, rich groundwater, water penetration, and most underground water are rich in the corrosive mediums such as chlorion, this chlorion allowed in surrounding environment easily penetrates into inside concrete and triggers steel bar corrosion.Stray electrical current produced by during engineering operation has not only broken up the intensity of rail and all kinds of metal pipe lines in itself, reduces its service life, and the reinforcing bar in subway sectional tunnel agent structure occurs fatal destruction.And in the corrosive environment that the concrete structure of railway traffic engineering often coexists in stray electrical current and chlorion.Stray electrical current can form a stronger electric field in inside concrete, under the influence of the electric field, diffusion of the chlorion to inside concrete can significantly be increased, the limting concentration of Induced by Chloride steel bar corrosion, the stability of existence form is free and solidification and the migration rate to rebar surface etc. can be affected by it and change, the presence of chlorion can reduce the impedance of concrete simultaneously, action of rust of the acceleration stray electrical current to reinforcing bar, therefore the effect mutually promoted is there is therebetween, therefore the reinforcing bar in armored concrete under the conditions of this is in strong corrosive environment.
The content of the invention
In order to solve the above problems, the present invention devises a kind of subway engineering and suppresses chlorine ion binding capacity C40 special concrete compound methods, and production method is simple, and cost performance is higher, can preferably promote.
The technical scheme is that：
A kind of subway engineering is with chlorine ion binding capacity C40 special concretes are suppressed, mainly by cementitious material system（For cement and active mineral admixture）, fine aggregate, coarse aggregate, additive composition；Design unit weight is 2400kg/m3；The technical parameter of the concrete is that water-cement ratio is 0.34-0.38, and sand coarse aggregate ratio is 34%-39%.
The cement is Portland cement, and its intensity is 42.5MPa, and performance indications meet national regulation requirement；
The binder materials is active material, is made up of miberal powder, flyash and stone flour；Flyash, miberal powder 7d and 28d activity index are not less than 70% and 90%, corresponding index respectively（Fineness, water content, specific surface area, loss on ignition, chloride ion content, sulfur trioxide content）Meet code requirement；
The fine aggregate uses modulus of fineness for 2.5-3.0, the middle sand in II areas（River sand）；The coarse aggregate is 5-40 cobble, and corresponding performance indications meet the requirements；
The additive is polycarboxylate water-reducer, and water-reducing rate >=25%, the adaptability with binder materials is good, and corresponding performance indications meet the requirements.
The compound method of above-mentioned C40 concrete is：Add fine aggregate, binder materials successively（Cement and active mineral admixture）, coarse aggregate enter forced mixer, stir 20 seconds, add water and discharged within 120 seconds with stirring after additive.
The C40 concrete of the present invention is primarily adapted for use in railway traffic engineering, the corrosion to suppress reinforced concrete, compared with prior art the invention has the characteristics that and beneficial effect：
（1）The present invention is used than more conventional raw material, track traffic C40 concrete has been made using more conventional production technology, and largely utilizes industrial waste, and manufacturing cost is relatively low；
Economic analysis of the present invention：C40 concrete, using conventional PO42.5 Portland cements, using industrial residue slag micropowder, flyash, Machine-made Sand and discarded object stone flour, special raw material are not used, special production technology is not used yet, its cost is slightly below the price of commercial goods concrete, but its durability is far longer than the durability of commercial concrete, so as to largely reduce the corrosion of reinforcement in concrete；
（2）The durability of concrete of the present invention is preferable：Freeze thawing resistance circulation ＞ 350 times, 500 coulombs of electric flux ＜, chloride diffusion coefficient ＜ 2 × 10-8cm2/ s, realizes the intensity for both ensureing concrete, and the durability of concrete is improved again, it is possessed the principal character of high performance concrete, and reduces production cost, while considerably reducing maintenance cost.
（3）Whole process of the C40 concrete prepared using compound method of the present invention from production to construction is all very easy, and working performance of concrete is good, not sticky, do not isolate, and is easy to pour, and mechanics and durability can meet design requirement, and cost performance is higher.
With reference to embodiment, the invention will be further described.
Embodiment
The preferred embodiments of the present invention are illustrated below, it will be appreciated that preferred embodiment described herein is merely to illustrate and explain the present invention, and is not intended to limit the present invention.
Unless otherwise indicated, the percentage employed in the present invention is percetage by weight.
Embodiment
1
Chlorine ion binding capacity C40 special concretes, match ratio are as follows with suppressing for a kind of subway engineering, and numbering is 1：
Cement：
250
Flyash：
70
Miberal powder：
60
Stone flour：
50
Water：
153
Additive：
11.25
Fine aggregate：
707
Coarse aggregate：
1106
Embodiment
2
Match ratio is as follows, and numbering is 2：
Cement：
240
Flyash：
65
Miberal powder：
55
Stone flour：
70
Water：
144
Additive：
12
Fine aggregate：
700
Coarse aggregate：
1110
Embodiment
3
Match ratio is as follows, and numbering is 3：
Cement：
260
Flyash：
70
Miberal powder：
60
Stone flour：
60
Water：
162
Additive：
11
Fine aggregate：
710
Coarse aggregate：
1100
Reference examples
Conventional C40 concrete mixs 4, it is as follows：
Cement：
300
Flyash：
80
Miberal powder：
70
Water：
162
Additive：
11
Fine aggregate：
710
Coarse aggregate：
1100
Application Example
Performance test is carried out to 1-4 of embodiment of the present invention concrete below.
The result of the test of table 1
Remarks：Sequence number 4 is routine C40 concrete tests.
Pass through above-mentioned result of the test, it can be seen that：
Special type C40 concrete of the invention has preferable anti-freezing property and relatively low chloride permeability performance, being capable of the preferable popularization and application in railway traffic engineering.
Claims (3)
1. a kind of subway engineering suppression chlorine ion binding capacity C40 special concretes, it is characterised in that：Mainly it is made up of cementitious material system, fine aggregate, coarse aggregate, additive；Design unit weight is 2400kg/m3；The technical parameter of the concrete is that water-cement ratio is 0.34-0.38, and sand coarse aggregate ratio is 34%-39%.
2. extraordinary C40 concrete according to claim 1, it is characterised in that：The cement is Portland cement, and its intensity is 42.5MPa；
The binder materials is active material, is made up of miberal powder, flyash and stone flour；Flyash, miberal powder 7d and 28d activity index are not less than 70% and 90% respectively；
The fine aggregate uses modulus of fineness for 2.5-3.0, the middle sand in II areas（River sand）；The coarse aggregate is 5-40 cobble；
The additive is polycarboxylate water-reducer, water-reducing rate >=25%.
3. the compound method of C40 concrete according to claim 1 or 2, it is characterised in that：Concrete operations are：Add successively and fine aggregate, cementitious material system, coarse aggregate are entered into forced mixer, stir 20 seconds, add water and discharged within 120 seconds with stirring after additive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610245184.7A CN107304118A (en) | 2016-04-19 | 2016-04-19 | A kind of subway engineering suppression chlorine ion binding capacity C40 special concrete compound methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610245184.7A CN107304118A (en) | 2016-04-19 | 2016-04-19 | A kind of subway engineering suppression chlorine ion binding capacity C40 special concrete compound methods |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107304118A true CN107304118A (en) | 2017-10-31 |
Family
ID=60151575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610245184.7A Pending CN107304118A (en) | 2016-04-19 | 2016-04-19 | A kind of subway engineering suppression chlorine ion binding capacity C40 special concrete compound methods |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107304118A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102690090A (en) * | 2012-06-21 | 2012-09-26 | 江苏建华管桩有限公司 | Concrete doped with cement modification agent and preparation method for concrete |
| CN103011637A (en) * | 2013-01-05 | 2013-04-03 | 中交四航工程研究院有限公司 | Bare concrete binding material and corrosion-resistant bare concrete utilizing same |
| CN104817306A (en) * | 2015-04-17 | 2015-08-05 | 中国二十二冶集团有限公司 | Method for preparing C40 concrete by artificial rock ash and mineral waste |
-
2016
- 2016-04-19 CN CN201610245184.7A patent/CN107304118A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102690090A (en) * | 2012-06-21 | 2012-09-26 | 江苏建华管桩有限公司 | Concrete doped with cement modification agent and preparation method for concrete |
| CN103011637A (en) * | 2013-01-05 | 2013-04-03 | 中交四航工程研究院有限公司 | Bare concrete binding material and corrosion-resistant bare concrete utilizing same |
| CN104817306A (en) * | 2015-04-17 | 2015-08-05 | 中国二十二冶集团有限公司 | Method for preparing C40 concrete by artificial rock ash and mineral waste |
Non-Patent Citations (1)
| Title |
|---|
| 程心恕等编: "《高等水工建筑物》", 30 September 2011, 中国水利水电出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gencel et al. | Steel slag and its applications in cement and concrete technology: A review | |
| Anastasiou et al. | Utilization of fine recycled aggregates in concrete with fly ash and steel slag | |
| Hossain et al. | Lightweight concrete incorporating pumice based blended cement and aggregate: Mechanical and durability characteristics | |
| Oluwasola et al. | Characteristics and utilization of steel slag in road construction | |
| Khalil et al. | Carbonation of ternary cementitious concrete systems containing fly ash and silica fume | |
| Awoyera et al. | Influence of electric arc furnace (EAF) slag aggregate sizes on the workability and durability of concrete | |
| Poitevin | Limestone aggregate concrete, usefulness and durability | |
| CN102795819A (en) | Low-carbon high-performance tunnel shotcrete composite cementing material | |
| CN107285702B (en) | A kind of filling slurry of coal mine doping discarded concrete aggregate | |
| Chouhan et al. | Utilization of granite slurry waste in concrete: a review | |
| Pribulová et al. | Processing and utilization of metallurgical slags | |
| CN102617091A (en) | Machine-made sand self-leveling concrete | |
| CN102491706A (en) | High-performance concrete used in saline-alkaline corrosive environment | |
| Papayianni et al. | Utilization of electric arc furnace steel slags in concrete products | |
| Vignesh et al. | Effect of partial replacement of natural sand with gold mine tailings on some properties of masonry mortars | |
| Patil et al. | Behaviour of silico manganese slag manufactured aggregate as material for road and rail track construction | |
| KR100196702B1 (en) | Method for preparing concrete | |
| Ovbeniyekede et al. | Water absorption and compressive strength of self compacting concrete incorporating fly ash and quarry dust | |
| CN107304118A (en) | A kind of subway engineering suppression chlorine ion binding capacity C40 special concrete compound methods | |
| Dumitru et al. | Waste glass | |
| Papayianni et al. | REALIZAREA UNUI BETON CU PRET REDUS, PENTRU PAVAJE RUTIERE/DEVELOPMENT OF LOW-COST CONCRETE FOR ROAD PAVEMENTS | |
| KR101622257B1 (en) | Composition of a pile using byproduct materials and weak ground reinforcing piles for railway using the same | |
| Vyas et al. | Fly Ash and Recycled Coarse Aggregate in Concrete: New Era for Construction Industries-A Literature Review | |
| CN107857543A (en) | A kind of preparation method of precenting chlorate corrosion environmental protection mortar | |
| Ghailan | Modified concrete by using a waste material as a coarse aggregate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171031 |
|
| RJ01 | Rejection of invention patent application after publication |