CN106565164A - Modified high-sulfate-resistant corrosion-resistant concrete - Google Patents
Modified high-sulfate-resistant corrosion-resistant concrete Download PDFInfo
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- CN106565164A CN106565164A CN201510647752.1A CN201510647752A CN106565164A CN 106565164 A CN106565164 A CN 106565164A CN 201510647752 A CN201510647752 A CN 201510647752A CN 106565164 A CN106565164 A CN 106565164A
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- corrosion resistant
- resistant concrete
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- 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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Abstract
The invention discloses modified high-sulfate-resistant corrosion-resistant concrete comprising cement, fly ash, mineral powder, silica fume, sand, stones, a new high performance admixture and water; and the modified high-sulfate-resistant corrosion-resistant concrete has the advantages of low cost, wide applicability and good sulfate-resistant performance.
Description
Technical field
The present invention relates to a kind of new concrete, specifically a kind of concrete of opposing sulfate attack, belongs to building materials field.
Background technology
Concrete as cheap, draw materials convenience, application property are good, are widely used in all kinds of engineerings, occupy an leading position in architectural engineering as maximum culture's material.With the development of concrete, concrete strength has no longer been focus of attention, and people increasingly focus on the endurance issues of concrete.Concrete structure even having occurred as soon as surface peeling, MATRIX CRACKING for several years using decades, structure efflorescence is soft, intensity decreases are even lost, separate out the phenomenons such as the crystalline solid of white in crackle.This belongs to typical sulfate attack, and sulfate attack is the one of the main reasons for affecting concrete durability, and a kind of erosion hazard that influence factor is the most complicated, destructiveness is maximum.
Concrete Sulfate Attack is a complicated process, can be divided into physical erosion and chemical erosion.Physical erosion is that sulfate penetrates into inside concrete, and as moisture is reduced, itself crystallization is separated out, and is produced swelling stress, is caused concrete destruction.Chemical erosion is broadly divided into entringite and corrodes and Gypsum Fibrosum erosion.Entringite erosion is that the sulfate ion in environment penetrates into inside concrete by pore, with hydrated product Ca（OH）2Reaction generates CaSO4·2H2O, then entringite is generated with the reaction of solid-state drated calcium aluminate.Entringite volumetric expansion, grows to all directions along with entringite belongs to acicular crystal, produces concentrated stress, be easily caused concrete cracking destruction.It is that the pore in Behavior of Hardened Cement Paste is saturated lime solution and is filled, and can not only produce entringite when sulfate ion concentration is more than 1000mg/L that Gypsum Fibrosum corrodes, and also has gypsum crystal precipitation, causes volumetric expansion, and producing local stress makes concrete produce destruction.Research shows, under sodium sulfate environment, when concentration be less than 1000mg/L when, corrosion products based on entringite, when concentration be more than 8000mg/L when, product based on Gypsum Fibrosum, when concentration exists（1000~8000）During mg/L, both products have concurrently.
It is for the erosion mechanism of sulfate, many at present mixing material to be mixed in concrete or the means such as preservative suppress to sulfate attack made by mixing material using sulfate-resistant cement is selected, it is relatively costly.Sulfate-resistant cement simply has corrosion resistance to the all-fulfate of certain density sulfate ion, the corrosion of all sulfate mediums is not resistant to, it is not anti-corrosion if to ammonium sulfate, magnesium sulfate medium, it is also not anti-corrosion to sulphuric acid, sulfurous acid, also intolerant to sulfur dioxide, the corrosion of sulfur trioxide gas.Sulfate-resistant cement preferably, because the concentration of medium is more constant in underground or water, and is not likely to produce crystallization condition used in underground or water.Superstructure is typically not likely to produce the liquid corrosion of simple sulfate ion due to the complicated and instability of corrosive medium, is also easy to produce the situation of alternation of wetting and drying at outdoor position, so superstructure should not generally use sulfate-resistant cement.
The content of the invention：
It is an object of the invention to solve the deficiencies in the prior art, there is provided a kind of cost is relatively low, the suitability is extensive, the concrete that Sulphate-resistant property is good.
The present invention the adopted technical scheme that solves the above problems is：
A kind of high sulfur resistive corrosion resistant concrete that is modified, is made up of the raw material of following weight portion：
Cement, flyash, breeze, silicon ash, sand, stone, novel high-performance additive and water；
Cement：165~180kg；
Flyash：120~130kg；
Breeze：100~110kg；
Silicon ash：17~35kg；
Sand：672kg；
Stone：1143kg；
Water：165kg；
Additive：10.5kg.
Wherein, the cement is P.O42.5R cement, and 28d comprcssive strength is 49.8MPa；The flyash is second class powered coal ash, and fineness is 22%, and it is 77% that water demand ratio is 101%, 28d activity indexs；The breeze is S95 level breezes, and specific surface area is 430m2It is 106% that/kg, 7d activity index is 79%, 28d activity indexs；It is 118% that the silicon ash water requirement is 121%, 28d activity indexs；The sand is middle sand, and modulus of fineness is 2.6, and clay content is 2.1%；The stone specification particle diameter is 5 ~ 20mm, and clay content is 0.3%；The additive is polycarboxylate water-reducer, and solid content is 12%, and water-reducing rate is 29%；The water reducer collapses composition, slow setting composition, bleed into being grouped into by diminishing composition, guarantor, and each component part by weight is 6:4:2:0.05, the diminishing composition and guarantor composition that collapses is high molecular polymer, wherein contain hydroxyl, carboxyl, sulfonic group and polyoxyethylene groups, these groups define comb-type structure in whole polymer, and the electrostatic repulsion effect of generation and space steric effect play dispersion and keep scattered effect to cement granules；Slow setting composition is Portugal's sodium, plays a part of to delay hydrated cementitious, reduces loss.Bleed composition plays a part of to improve concrete workability, improves durability.
Concrete of the present invention adopts C30 proportionings, and in every cube of concrete, the weight of each component is：Cement is 165 ~ 180kg, and flyash is 120 ~ 130kg, and breeze is 100 ~ 110kg, and silicon ash is 17 ~ 35kg, and sand is 672kg, and stone is 1143kg, and water is 165kg, and additive is 10.5kg.By weight percentage, after each component mixing, mixing time was at 120 ~ 180 seconds for above each component, so that the low production cost of the present invention, intensity satisfaction requirement, degree of compaction are high, good endurance, can effectively resist sulfate attack, it is adaptable to high-concentration sulfuric acid salt environment.
The present invention compared with prior art, with advantages below and effect：
(1) present invention it is a large amount of in fly ash, breeze, reduce cement consumption, effectively reduce the heat of hydration, it is to avoid concrete produces thermal cracking, improves the stability of concrete；
(2) silicon ash is mixed in the present invention, improve degree of compaction, reduce sulfate into the passage of inside concrete；
(3) although silicon ash price is higher in the present invention, volume≤8%, comprehensive total Binder Materials, cost decrease；
(4) present invention uses high-performance water reducing agent, cost is controllable, and this admixtures water-reducing ratio is 29%, the water consumption of folk prescription concrete is reduced, capillary pore volume is reduced, is reduced concrete shrinkage, volume stability is enhanced, concrete resistant to chemical etching ability is improve.
Specific embodiment：
Below by example, the invention will be further described.
Embodiment：Raw material of the present invention includes cement, water, flyash, breeze, silicon ash, sand, stone and additive.Embodiment 1,2,3 and additive plays a crucial role to resisting erosion of sulfate ability used by comparative example, main component are that diminishing composition, guarantor are collapsed composition, slow setting composition, bleed composition.Diminishing composition and guarantor collapse composition for graft copolymer, are comb-type structure, by polymeric monomer TPEG（Methyl allyl polyoxyethylene ether）With acrylic acid etc. under chain-transferring agent and catalyst, the collective effect of initiator, form in specified temp copolymerization.Slow setting composition is sodium gluconate, and bleed composition is triterpenoid saponin.By these components in certain proportion 6:4:2:0.05 mixing compounding forms additive used by the present invention.The each group component for preparing concrete of the present invention is shown in Table 1：
Table 1（Unit：kg）
When preparing the concrete of the present invention, only required raw material need to be put into blender in order, be stirred.Feeding sequence is：Stone is first put into, then puts into cement, flyash, breeze and silicon ash, then put into sand, after raw material is stirred evenly by stirring 30s, then additive is added to the water, input blender stirs 120 ~ 180s and goes out machine.
The concrete prepared according to different formulations in table 1 has identical strength grade, is all C30.Concrete in the present invention has good performance, and corrosion resistance is excellent.Properties test is carried out to embodiment in table 1 and comparative example, relevant parameter is obtained, is shown in Table 2：
As shown in Table 2, in the present invention, concrete has good service behaviour, mechanical property and endurance quality.Concrete has good mobility, loses less, is conducive to long distance transportation.Using the additive of the present invention, concrete crushing strength is higher.Embodiment 1,2,3 is compared with comparative example, is respectively provided with higher resisting erosion of sulfate ability.Embodiment 2 is preferred example.
Claims (9)
1. be modified high sulfur resistive corrosion resistant concrete, it is characterised in that is made up of the raw material of following weight portion：Cement：165~180kg；
Flyash：120~130kg；
Breeze：100~110kg；
Silicon ash：17~35kg；
Sand：672kg；
Stone：1143kg；
Water：165kg；
Additive：10.5kg.
2. it is according to claim 1 be modified high sulfur resistive corrosion resistant concrete, it is characterised in that：The cement is P.O42.5R cement, and 28d comprcssive strength is 49.8MPa.
3. it is according to claim 1 be modified high sulfur resistive corrosion resistant concrete, it is characterised in that：The flyash is second class powered coal ash, and fineness is 22%, and it is 77% that water demand ratio is 101%, 28d activity indexs.
4. it is according to claim 1 be modified high sulfur resistive corrosion resistant concrete, it is characterised in that：The breeze is S95 level breezes, and specific surface area is 430m2It is 106% that/kg, 7d activity index is 79%, 28d activity indexs.
5. it is according to claim 1 be modified high sulfur resistive corrosion resistant concrete, it is characterised in that：It is 118% that the silicon ash water requirement is 121%, 28d activity indexs.
6. it is according to claim 1 be modified high sulfur resistive corrosion resistant concrete, it is characterised in that：The sand is middle sand, and modulus of fineness is 2.6, and clay content is 2.1%.
7. it is according to claim 1 be modified high sulfur resistive corrosion resistant concrete, it is characterised in that：The stone specification particle diameter is 5 ~ 20mm, and clay content is 0.3%.
8. it is according to claim 1 be modified high sulfur resistive corrosion resistant concrete, it is characterised in that：The additive is polycarboxylate water-reducer, and solid content is 12%, and water-reducing rate is 29%.
9. it is according to claim 8 be modified high sulfur resistive corrosion resistant concrete, it is characterised in that：The water reducer collapses composition, slow setting composition, bleed into being grouped into by diminishing composition, guarantor, and each component part by weight is 6:4:2:0.05；The described diminishing composition and guarantor composition that collapses is high molecular polymer, wherein containing hydroxyl, carboxyl, sulfonic group and polyoxyethylene groups；The slow setting composition is Portugal's sodium.
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| CN201510647752.1A CN106565164A (en) | 2015-10-09 | 2015-10-09 | Modified high-sulfate-resistant corrosion-resistant concrete |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107200523A (en) * | 2017-07-05 | 2017-09-26 | 汤始建华建材（苏州）有限公司 | A kind of corrosion resistant concrete |
| CN107721319A (en) * | 2017-11-17 | 2018-02-23 | 天津海得润滋建材有限公司 | Strong concrete mix |
| CN108585645A (en) * | 2018-05-11 | 2018-09-28 | 安徽砼宇特构科技有限公司 | A kind of corrosion-resistant tubing members and preparation method thereof |
| CN109942260A (en) * | 2019-05-13 | 2019-06-28 | 武汉明华鸿昌新型建材有限责任公司 | A kind of preparation method of the C50 high performance concrete prepared using silicon ash |
| CN110981303A (en) * | 2019-12-13 | 2020-04-10 | 湖北环沙再生资源有限公司 | Mineral powder doped concrete and preparation method thereof |
| CN113666695A (en) * | 2021-08-26 | 2021-11-19 | 洛阳古建园林设计院有限公司 | Anti-corrosion material and building decoration made of same |
| CN114656203A (en) * | 2020-12-23 | 2022-06-24 | 新沂市瑞阳混凝土工程有限公司 | Building concrete and preparation process thereof |
| CN115677289A (en) * | 2022-10-24 | 2023-02-03 | 山西四建集团有限公司 | Multi-element solid waste composite micro powder corrosion-resistant concrete |
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| CN102515646A (en) * | 2011-12-15 | 2012-06-27 | 中建三局建设工程股份有限公司 | Antifreeze anticorrosion durable concrete and preparation method thereof |
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| CN1850707A (en) * | 2006-05-11 | 2006-10-25 | 同济大学 | Self-compacted concrete of resisting erosion of sulfate and its preparing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107200523A (en) * | 2017-07-05 | 2017-09-26 | 汤始建华建材（苏州）有限公司 | A kind of corrosion resistant concrete |
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| CN108585645A (en) * | 2018-05-11 | 2018-09-28 | 安徽砼宇特构科技有限公司 | A kind of corrosion-resistant tubing members and preparation method thereof |
| CN109942260A (en) * | 2019-05-13 | 2019-06-28 | 武汉明华鸿昌新型建材有限责任公司 | A kind of preparation method of the C50 high performance concrete prepared using silicon ash |
| CN110981303A (en) * | 2019-12-13 | 2020-04-10 | 湖北环沙再生资源有限公司 | Mineral powder doped concrete and preparation method thereof |
| CN114656203A (en) * | 2020-12-23 | 2022-06-24 | 新沂市瑞阳混凝土工程有限公司 | Building concrete and preparation process thereof |
| CN113666695A (en) * | 2021-08-26 | 2021-11-19 | 洛阳古建园林设计院有限公司 | Anti-corrosion material and building decoration made of same |
| CN113666695B (en) * | 2021-08-26 | 2022-07-08 | 洛阳古建园林设计院有限公司 | Anti-corrosion material and building decoration made of same |
| CN115677289A (en) * | 2022-10-24 | 2023-02-03 | 山西四建集团有限公司 | Multi-element solid waste composite micro powder corrosion-resistant concrete |
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Application publication date: 20170419 |