CN105859195B - A kind of preparation method with compensation contractile function and since conservation function concrete - Google Patents

A kind of preparation method with compensation contractile function and since conservation function concrete Download PDF

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Publication number
CN105859195B
CN105859195B CN201610176394.5A CN201610176394A CN105859195B CN 105859195 B CN105859195 B CN 105859195B CN 201610176394 A CN201610176394 A CN 201610176394A CN 105859195 B CN105859195 B CN 105859195B
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China
Prior art keywords
concrete
pottery sand
compensation
preparation
function
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CN201610176394.5A
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CN105859195A (en
Inventor
李强
王洪梅
马涛
蒋临生
孙琳
祖庆贺
臧军
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Xuzhou Zhong Lian Concrete Co Ltd
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Xuzhou Zhong Lian Concrete Co Ltd
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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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/023—Chemical treatment
    • 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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/10—Coating or impregnating
    • C04B20/1018—Coating or impregnating with organic materials
    • C04B20/1029—Macromolecular compounds
    • C04B20/1048—Polysaccharides, e.g. cellulose, or derivatives thereof

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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)
  • General Chemical & Material Sciences (AREA)
  • Aftertreatments Of Artificial And Natural Stones (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

A kind of preparation method with compensation contractile function and since conservation function concrete, pottery sand is soaked in concentration as in 1 ~ 3M sodium acetate or/and the aqueous solution of potassium acetate, then collodion is sprayed to form pellicle in the outer surface of pottery sand to pottery sand, next coat cement paste in the outer surface of pottery sand.The present invention is acted on using the osmotic pressure of pellicle, inside concrete can be made to continue to produce expansion, the various contractions of compensating concrete after curing, to reduce the internal stress of concrete, in addition, in ambient humidity relatively low dry season, the water being enclosed in pellicle can reduce the risk that cup shake occurs for concrete with the moisture loss of compensating concrete.

Description

A kind of preparation method with compensation contractile function and since conservation function concrete
Technical field
The present invention relates to a kind of preparation method with compensation contractile function and since conservation function concrete, it is new to belong to building Field of material technology.
Background technology
Modern concrete produces internal stress and causes volume stability to be deteriorated there is various forms of contractions. Currently existing means are by some swelling agents（Predominantly aluminium sulfate, calcium oxide series）Carry out the contraction of compensating concrete. The expansion period of these swelling agents is shorter, plays compensation contraction within one week only after the concrete is cured, hereafter expands Agent itself is also constantly to shrink.In recent years, magnesia system swelling agent can make up drawbacks described above, but due to standard phase It is contrary to, is difficult to promote the use of always.
The content of the invention
It is an object of the present invention to provide a kind of preparation method with compensation contractile function and since conservation function concrete.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：One kind has compensation contractile function and Self-curing work( The preparation method of energy concrete, it is 1 ~ 3M that pottery sand is soaked in into concentration（Molar concentration）Sodium acetate or/and potassium acetate it is water-soluble In liquid, collodion then is sprayed to form pellicle in the outer surface of pottery sand to pottery sand, is next coated in the outer surface of pottery sand Cement paste.
Preferably technical scheme is：The pottery sand is shale pottery, and the maximum particle size of the shale pottery is less than or equal to 2 millis Rice.
Preferably technical scheme is：The collodion is dissolved in by cellulose nitrate in the mixture that ether and ethanol are formed It is made.
Preferably technical scheme is：The mass ratio of the ether and ethanol between the two is 1:1~2.
Preferably technical scheme is：The mass percent concentration of the cellulose nitrate is 3 ~ 10%.
Preferably technical scheme is：The ratio of mud of the cement paste is 0.3 ~ 0.5.
Because above-mentioned technical proposal is used, the present invention has following advantages and effect compared with prior art：
The present invention is acted on using the osmotic pressure of pellicle, inside concrete can be made to continue to produce expansion, compensating concrete exists Various contractions after hardening, to reduce the internal stress of concrete, in addition, in ambient humidity relatively low dry season, it is enclosed in semi-transparent Water in film can reduce the risk that cup shake occurs for concrete with the moisture loss of compensating concrete.
Embodiment
With reference to embodiment, the invention will be further described：
Embodiment one：A kind of preparation method with compensation contractile function and since conservation function concrete.
A kind of preparation method with compensation contractile function and since conservation function concrete, it is 1M that pottery sand is soaked in into concentration （Molar concentration）Aqueous sodium acetate solution in, after pottery sand fully absorbs sodium acetate solution, then to pottery sand spray collodion with The outer surface of pottery sand forms one layer of pellicle, coats the water that one layer of ratio of mud is 0.3 in the outer surface of pottery sand again after film formation Cement paste.The pottery sand is shale pottery, and the maximum particle size of the shale pottery is less than or equal to 2 millimeters.
The collodion, which is dissolved in by cellulose nitrate in the mixture that ether and ethanol forms, to be made.The ether and second The mass ratio of alcohol between the two is 1:1.The mass percent concentration of the cellulose nitrate is 5%.
Embodiment two：A kind of preparation method with compensation contractile function and since conservation function concrete.
A kind of preparation method with compensation contractile function and since conservation function concrete, pottery sand is soaked in into concentration is 1.5M（Molar concentration）Sodium acetate and the aqueous solution of mixture that forms of potassium acetate in, sodium acetate and potassium acetate are between the two Mass ratio is 1:2.Collodion is sprayed with the outer surface shape of pottery sand after pottery sand fully absorbs sodium acetate solution, then to pottery sand Into one layer of pellicle, the cement paste that one layer of ratio of mud is 0.3 is coated in the outer surface of pottery sand again after film formation.The pottery sand For shale pottery, the maximum particle size of the shale pottery is less than or equal to 2 millimeters.
The collodion, which is dissolved in by cellulose nitrate in the mixture that ether and ethanol forms, to be made.The ether and second The mass ratio of alcohol between the two is 1:1.The mass percent concentration of the cellulose nitrate is 5%.
Embodiment three：A kind of preparation method with compensation contractile function and since conservation function concrete.
A kind of preparation method with compensation contractile function and since conservation function concrete, it is 2M that pottery sand is soaked in into concentration （Molar concentration）Potassium acetate solution in, after pottery sand fully absorbs sodium acetate solution, then to pottery sand spray collodion with The outer surface of pottery sand forms one layer of pellicle, coats the water that one layer of ratio of mud is 0.4 in the outer surface of pottery sand again after film formation Cement paste.The pottery sand is shale pottery, and the maximum particle size of the shale pottery is less than or equal to 2 millimeters.
The collodion, which is dissolved in by cellulose nitrate in the mixture that ether and ethanol forms, to be made.The ether and second The mass ratio of alcohol between the two is 1:1.2.The mass percent concentration of the cellulose nitrate is 6%.
Example IV：A kind of preparation method with compensation contractile function and since conservation function concrete.
A kind of preparation method with compensation contractile function and since conservation function concrete, it is 1M that pottery sand is soaked in into concentration （Molar concentration）Aqueous sodium acetate solution in, after pottery sand fully absorbs sodium acetate solution, then to pottery sand spray collodion with The outer surface of pottery sand forms one layer of pellicle, coats the water that one layer of ratio of mud is 0.5 in the outer surface of pottery sand again after film formation Cement paste.The pottery sand is shale pottery, and the maximum particle size of the shale pottery is less than or equal to 2 millimeters.
The collodion, which is dissolved in by cellulose nitrate in the mixture that ether and ethanol forms, to be made.The ether and second The mass ratio of alcohol between the two is 1:1.The mass percent concentration of the cellulose nitrate is 5%.
Obtained pottery sand substitutes the fine aggregate in common C30 concrete with 20% ratio, while prepares using after swelling agent Freeze thawing resistance C30 concrete, test three kinds of concrete limited expansion rate：Limited expansion rate（%）.
In 7d water In 28d water In 60d water In 180d water
Common C30 -0.015 -0.028 -0.030 -0.030
Swelling agent concrete C30 0.032 0.018 0.011 0.006
C30 of the present invention 0.033 0.034 0.031 0.031
C30 of the present invention is that the fine aggregate in common C30 is replaced with pottery sand made from the present embodiment.
By the present invention in that being carrier with internal porous, the less pottery sand of granularity, pottery sand is soaked in the higher salt of concentration In solution, after immersion fully, the collodion in the coating of pottery sand surface, it is semi-transparent to form one layer of collodion for pottery sand surface after air-drying Film, after pellicle is formed, then in one layer of cement paste of pottery sand Surface coating, to strengthen the abrasion resistance on pottery sand surface.Work as coagulation After soil hardening, because the ion concentration inside pellicle be higher than outside concentration, the moisture outside pellicle can be migrated internally, partly Permeable membrane can expand and produce certain swelling stress, make up the contraction of concrete.When concrete is in dry environment, half The moisture that moisture inside permeable membrane can be scattered and disappeared to outside migration with compensating concrete, reduces the wind that cup shake occurs for concrete Danger.This expansive concrete can be with long-term role, the defects of compensate for existing swelling agent concrete batching.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art Scholar can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all according to the present invention The equivalent change or modification that Spirit Essence is made, it should all be included within the scope of the present invention.

Claims (6)

  1. A kind of 1. preparation method with compensation contractile function and since conservation function concrete, it is characterised in that：Pottery sand is soaked In the sodium acetate or/and the aqueous solution of potassium acetate that concentration is 1 ~ 3M, collodion then is sprayed with the appearance of pottery sand to pottery sand Face forms pellicle, and cement paste is next coated in the outer surface of pottery sand, and obtained pottery sand is substituted common with 20% ratio Fine aggregate in C30 concrete.
  2. 2. the preparation method with compensation contractile function and since conservation function concrete according to claim 1, its feature It is：The pottery sand is shale pottery, and the maximum particle size of the shale pottery is less than or equal to 2 millimeters.
  3. 3. the preparation method with compensation contractile function and since conservation function concrete according to claim 1, its feature It is：The collodion, which is dissolved in by cellulose nitrate in the mixture that ether and ethanol forms, to be made.
  4. 4. the preparation method with compensation contractile function and since conservation function concrete according to claim 3, its feature It is：The mass ratio of the ether and ethanol between the two is 1:1~2.
  5. 5. the preparation method with compensation contractile function and since conservation function concrete according to claim 3, its feature It is：The mass percent concentration of the cellulose nitrate is 3 ~ 10%.
  6. 6. the preparation method with compensation contractile function and since conservation function concrete according to claim 1, its feature It is：The ratio of mud of the cement paste is 0.3 ~ 0.5.
CN201610176394.5A 2016-03-25 2016-03-25 A kind of preparation method with compensation contractile function and since conservation function concrete Active CN105859195B (en)

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Publication number Priority date Publication date Assignee Title
CN111792888A (en) * 2020-07-07 2020-10-20 深圳市汉工造技术有限公司 Ultrahigh-toughness self-curing cement-based product and preparation method thereof
CN115849827B (en) * 2022-12-24 2023-12-19 北京泽华路桥工程有限公司 High-strength anti-freezing concrete and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101898877A (en) * 2010-08-17 2010-12-01 重庆大学 Method for pretreating lightweight aggregate used for internal curing of cement-based materials
CN102358773A (en) * 2011-07-11 2012-02-22 桂林理工大学 Preparation method for water-preserving and salt-tolerant alkaline concrete internal curing agent
CN105060760A (en) * 2015-08-07 2015-11-18 武汉理工大学 Montmorillonite internal curing agent modified by vinyl carboxylate copolymer and preparation method for montmorillonite internal curing agent

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1192248A (en) * 1997-09-22 1999-04-06 Fujita Corp High-strength and lightweight concrete and its placing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101898877A (en) * 2010-08-17 2010-12-01 重庆大学 Method for pretreating lightweight aggregate used for internal curing of cement-based materials
CN102358773A (en) * 2011-07-11 2012-02-22 桂林理工大学 Preparation method for water-preserving and salt-tolerant alkaline concrete internal curing agent
CN105060760A (en) * 2015-08-07 2015-11-18 武汉理工大学 Montmorillonite internal curing agent modified by vinyl carboxylate copolymer and preparation method for montmorillonite internal curing agent

Non-Patent Citations (1)

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Title
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Inventor after: Li Qiang

Inventor after: Wang Hongmei

Inventor after: Ma Tao

Inventor after: Jiang Linsheng

Inventor after: Sun Lin

Inventor after: Zu Qinghe

Inventor after: Cang Jun

Inventor before: Zu Qinghe

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