CN1041712C - Method for preparing high impervious and anticorrosive concrete with ternary agent - Google Patents

Method for preparing high impervious and anticorrosive concrete with ternary agent Download PDF

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Publication number
CN1041712C
CN1041712C CN94119721A CN94119721A CN1041712C CN 1041712 C CN1041712 C CN 1041712C CN 94119721 A CN94119721 A CN 94119721A CN 94119721 A CN94119721 A CN 94119721A CN 1041712 C CN1041712 C CN 1041712C
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China
Prior art keywords
concrete
weight portion
cement
resistant
flyash
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CN94119721A
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Chinese (zh)
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CN1107817A (en
Inventor
樊粤明
李智诚
钟景裕
吴义明
黄文新
陈志雄
吕辉
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South China University of Technology SCUT
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South China University of Technology SCUT
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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
    • C04B2111/20—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
    • 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
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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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 present invention starts from the angles of integrally solving permeation and corrosion and simultaneously enhancing concrete strength to work out a method for preparing concrete with high permeation resistance and corrosion resistance, which is desired by three-ply agent for water engineering and sea engineering buildings. The method uses 100 weight portion of cement as a primary standard on the basis of waterproof concrete and simultaneously mixes with the following additives: 0.3 to 1.0 weight portion of beta-naphthalene sulfonic acid formaldehyde condensation products, 0.05 to 0.15 weight portion of sodium abietate and 5 to 40 weight portion of fly ash. A permeation resistant label of concrete which is prepared by the method is increased to more than S30, a corrosion resistant capability is superior to concrete prepared by sulphate resistant cement, and compared with the primary standard concrete, the pressure resistant strength is enhanced by more than 20 percent.

Description

Three mixture preparation height is impervious, the method for anticorrosive concrete
The present invention relates to the concrete production technology, be specifically related to a kind of compound method of high impervious, anticorrosive concrete.
The anti-penetration grade of common water-proof concrete is S6.Some engineering adds water reducer or air entrapment agent or flyash or adds wherein two kinds of recombiners in order to improve impermeability on the basis of water-proof concrete, obtained certain effect.For example: in 1992 the 5th phases of " concrete " magazine, the 37th～48 page, be entitled as in " research of the early strong admixture performance of Venus series " literary composition, adding high efficiency water reducing agent (the undocumented technology of water reducer composition) is disclosed, when slump 5～7cm, can make the S10 of anti-penetration grade, bring up to more than the S12 from normal concrete.Still exist impermeability not high enough, and do not relate to the etch resistant properties problem.And for example: in 1993 the 2nd phases of " concrete " magazine, the 26th～31 page, be entitled as in " guaranteeing the measure of impervious water-proof concrete construction quality " literary composition, the technology of sodium abietate as air entrapment agent that add disclosed, can make impervious pressure bring up to 2.2MPa by 1.4MPa, its weak point is not only impervious not high enough but also along with air entrapment agent mixes, and concrete strength descends.Also as in 1992 the 1st phases of " concrete " magazine, the 41st～45 page, be entitled as in " flyash and concrete weather resistance " literary composition, announced structure institute of Chinese water power academy of sciences test-results, replace cement with 0%, 10%, 20%, 30%, 40% flyash respectively, coefficient of permeability ratio should be 100%, 65%, 42.3%, 58.5%, 21.7% increase along with doping quantity of fly ash mutually, coefficient of permeability reduces, reduction reaches 78.3% during volume 40%, but its concrete strength can reduce with the increase of doping quantity of fly ash.Method in sum, respectively for certain specific needs, start with from a certain side, correspondingly improving concrete anti-penetration grade in varying degrees, but anti-penetration grade all is difficult to surpass S30, the quality of background technology concrete batching is difficult to satisfy underground works, especially the needs of marine structure.
The objective of the invention is to overcome the weak point that background technology exists, the angle that also improves concrete strength impervious, against corrosion the time from comprehensive solution is started with, research and propose a kind of compound method that can satisfy required high impervious, the anticorrosive concrete of water conservancy projects such as offshore production platform, oil tank, subterranean tunnel, marine structure, promptly be provided at the optimum mix amount that adds water reducer, air entrapment agent and flyash on the basis of water-proof concrete.
Purpose of the present invention can reach by following measure:
A kind of compound method of high impervious, anticorrosive concrete, it is characterized in that: on the basis of water-proof concrete, admixing simultaneously with beta-naphthalenesulfonic-acid salt formaldehyde condensation products is that water reducer, sodium abietate are that air entrapment agent and flyash add thing for three kinds; They are that the volume scope of benchmark is by cement 100 weight parts:
Beta-naphthalenesulfonic-acid salt formaldehyde condensation products 0.3～1.0 weight part,
Sodium abietate 0.05～0.15 weight part,
Flyash 5～20 weight parts.
The contriver is impervious from satisfying, improve the angle of concrete strength requirement against corrosion the time, by a large amount of experiments and interpretation research, and comprehensive various factors, proposing one is the approach of the raising concrete quality of basis with the theory.
Because the water-reduction of water reducer beta-naphthalenesulfonic-acid salt formaldehyde condensation products, water consumption reduces, can reduce concrete overall porosity, and what perviousness was had the greatest impact is the pore of aperture 250～1000_, so improve impervious ability, not only overall porosity to be reduced, but also the structure in hole will be improved.Improve the structure in hole, will add air entrapment agent,, increase closed pores so that reduce open pore.Water reducer also has certain bleed effect, can produce airtight, stable, uniform microbubble, make kapillary attenuate little, song is analysed, disperse, thereby the minimizing water-permeable passage, but its bleed effect is not very best, also needs to add sodium abietate and makes air entrapment agent, to increase air content, improve the structure in hole.The hole of 250～1000_ is reduced, and closed pores increases, and a large amount of sealings, stable, uniform micro-bubble cut off kapillary, become tiny, disperse, thereby improve watertightness.Yet the air content increase can reduce concrete intensity again, common every increase by 1% air content, and the ultimate compression strength in the 28 day length of time descends 4～6%.Adopt flyash both as active fine aggregate, gather materials as filling again, its major part is the glass pearl, except that diminishing, filling effect are arranged, can also absorb the hydrated product Ca (OH) of cement 2Form hydrated calcium silicate, make the further densification of concrete.In addition, but add also instead of part cement and reduce the hydration heat of cement of fine coal, the concrete works of large volume also can use.But, if the inappropriate increase of flyash amount also can reduce concrete intensity.Collection improves concrete impervious, against corrosion and improves the intensity unity of contradictions, and selection adds the each component of thing and the principle of the optimum mix amount is:
The volume of water reducer is decided the adsorption of water reducer and the consumption that gathers materials according to gathering materials, and surface of aggregate is long-pending greatly, adsorptive capacity is big at most for consumption, and the water reducer volume also will be big.The volume of air entrapment agent is relevant with the vibration condition in when construction, and vibrating violent volume should be bigger.The volume of flyash is decided with character, form, the fineness of flyash, active high, that granulated glass sphere is many, fine size generally can mix some more.Otherwise, then can mix less.
The present invention compares with background technology, has following advantage:
1, adopt the concrete impervious label of this law preparation can bring up to more than the S30, with design label 300 *Not having the concrete for hydraulic structure that adds thing is benchmark (JZ represents with code name), and the concrete of being prepared with embodiment 1 (code name GYH, as follows) contrasts, and during slump 3～5cm, relevant data sees Table 1: table 1
Code name JZ GYH
Infiltration height om infiltration coefficient * 10 -10The permeable pressure Kgf/cm of cm/s 2Calculate infiltration label actual measurement infiltration label 13.8 41.0 6.9 6 6 1.1 0.27 94.8 84 ＞31 -
* only allow to be pressurized to 31Kgf/cm because of device-restrictive test organization 2, calculating anti-penetration grade then is S94.
2, adopt the concrete of this law embodiment 1 preparation, under slump variation situation greatly, still obtain better effects.Compare with the concrete of making benchmark, when slump 5～7cm, permeability coefficient reduces by 95.3%; When slump 10～15cm, permeability coefficient reduces by 87.9%; When slump 20.8cm, permeability coefficient reduces by 49.3%.
3, adopt the concrete resistance to corrosion of this law embodiment 1 preparation to be significantly increased.
(1) adopting mortar that this law and Portland cement make is 1.25 to the COEFFICIENT K against corrosion of sulfate liquor, and the mortar that makes with sulphate-resistant cement is 1.16 to the COEFFICIENT K against corrosion of sulfate liquor.Illustrate that the former is better than the latter.
(2) the cement paste test shows, the clean slurry of preparing with this law embodiment 1 can reduce Cl significantly -The ionic spread coefficient illustrates that this law can improve concrete anti-Cl -Ionic etch ability helps the antirust of reinforcing bar, and relevant data sees Table 2.Table 2
The sample code name JZ GYH
Diffusion coefficient D * 10 -nThe relative value of the relation conefficient D of cm/s D 15.8 0.9999 100 3.42 0.9770 21.9
(3) concrete of preparing with the normal concrete (JZ) of Portland cement preparation, with this law embodiment 1 (GYH), with the concrete (code name JS) that sulphate-resistant cement makes, under laboratory condition, carry out the marine denudation simultaneous test, test-results sees Table 3.
Table 3
The sample code name JZ GYH JS
COEFFICIENT K against corrosion Half a year 0.98 1.07 1.01
1 year 0.87 0.90 0.90
The marine denudation test-results shows, is better than the concrete of sulphate-resistant cement preparation with the anti-seawater of concrete of this law preparation.
4, adopt the concrete of this law preparation to compare the ultimate compression strength raising with normal concrete more than 20%.The result is an example with concrete compressive strength test in the length of time in 28 day, and pure concrete ultimate compression strength is 33.8MPa, is 41.6MPa and adopt the concrete ultimate compression strength of this law preparation, and promptly ultimate compression strength has improved 23%.
5, use many between the flyash of power plant test, carbon content is below 10%, specific surface 3000cm 2Above equal can the obtaining than satisfactory result event material source of/g enriched, and helps environment protection.
Embodiment
Feed intake by listed proportioning of table 4 and consumption, mix, make concrete with the routine operation method.Their performance sees Table 4.
Table 4
Material Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4
Proportioning (weight part) Consumption Kg/m 3 Proportioning (weight part) Consumption Kg/m 3 Proportioning (weight part) Consumption Kg/m 3 Proportioning (weight part) Consumption Kg/m 3
Cement 100 337 100 371 100 355 100 371
River sand 2.24 755 204 757 212 753 204 757
Rubble 383 1290 348 1290 365 1300 348 1290
Water 44 148 42 156 45 160 43 160
Beta-naphthalenesulfonic-acid salt formaldehyde condensation products 0.5 169 0.5 1.9 0.8 2.1 0.5 1.9
Sodium abietate 0.1 0.34 0.1 0.4 0.12 0.43 0.1 0.4
Flyash 10 34 10 37 20 71 10 37
The flyash that adopts among the embodiment 1 is that Huangpu power plant specific surface area is 5380cm 2/ g, embodiment 2,3 places of production are the same, but specific surface area is 4300cm 2/ g adopts husky angle B power plant flyash among the embodiment 4, specific surface area is 3520cm 2/ g.
Below be that the prepared concrete performance of each embodiment sees Table 5.Table 5
Figure 9411972100071
Table 5 shows that the present invention comprehensively solves high impervious, against corrosion, and improves the problem of concrete strength.

Claims (1)

1. the compound method of one kind high impervious, anticorrosive concrete, it is characterized in that: on the basis of water-proof concrete, admixing with beta-naphthalenesulfonic-acid salt formaldehyde condensation products simultaneously is water reducer, sodium abietate is that air entrapment agent and flyash add thing for three kinds; They are that the volume scope of benchmark is by cement 100 weight parts:
Beta-naphthalenesulfonic-acid salt formaldehyde condensation products 0.3～1.0 replacement part,
Sodium abietate 0.05～0.15 weight part,
Flyash 5～20 weight parts.
CN94119721A 1994-12-14 1994-12-14 Method for preparing high impervious and anticorrosive concrete with ternary agent Expired - Fee Related CN1041712C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN1041712C true CN1041712C (en) 1999-01-20

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1083806C (en) * 1999-02-04 2002-05-01 中国科学院广州化学研究所 Beta-naphthalenesulfonic-acid formaldehyde condensation compound quaternary ammonium salt type additive of concrete
CN1083807C (en) * 1999-05-28 2002-05-01 中国科学院广州化学研究所 Method for modifying concrete
CN1328203C (en) * 2005-03-30 2007-07-25 青海大学 Additive for saltresistance series concrete
CN100400456C (en) * 2006-06-08 2008-07-09 同济大学 Disruption inhibiting material of concrete sulphate crystal
CN100450964C (en) * 2007-05-25 2009-01-14 武永新 Micro-slump concrete for roller compacted concrete dam and construction method thereof
CN101497508B (en) * 2009-03-10 2012-07-04 中铁二院工程集团有限责任公司 Composite modifying agent and low-strength concrete prepared thereby
CN101898880B (en) * 2009-05-25 2012-08-15 浙江五龙新材股份有限公司 Air entraining agent for concrete with fly ash and preparation method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1088553A (en) * 1993-12-14 1994-06-29 谢盈庭 High-effect cement mortar, concrete consistence powder agent and preparation method thereof
CN1096280A (en) * 1994-04-15 1994-12-14 清华大学 High-effect cement special for concrete

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1088553A (en) * 1993-12-14 1994-06-29 谢盈庭 High-effect cement mortar, concrete consistence powder agent and preparation method thereof
CN1096280A (en) * 1994-04-15 1994-12-14 清华大学 High-effect cement special for concrete

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
《混凝土使用手册》第1版 1987.5.1 中国建筑科学研究院混凝土研究所主编 *

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