CN1181005C - Low slump loss concrete pumping agent - Google Patents

Low slump loss concrete pumping agent Download PDF

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Publication number
CN1181005C
CN1181005C CNB011405341A CN01140534A CN1181005C CN 1181005 C CN1181005 C CN 1181005C CN B011405341 A CNB011405341 A CN B011405341A CN 01140534 A CN01140534 A CN 01140534A CN 1181005 C CN1181005 C CN 1181005C
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China
Prior art keywords
agent
concrete
present
slump loss
concrete pumping
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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.)
Expired - Fee Related
Application number
CNB011405341A
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Chinese (zh)
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CN1357506A (en
Inventor
李乃珍
张晨娥
韩杰
何宋利
王保全
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李乃珍
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Priority to CNB011405341A priority Critical patent/CN1181005C/en
Publication of CN1357506A publication Critical patent/CN1357506A/en
Application granted granted Critical
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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
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
    • C04B2103/302—Water reducers
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
    • C04B2103/308—Slump-loss preventing agents
    • 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
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00146—Sprayable or pumpable mixtures

Abstract

The present invention provides a concrete pumping agent with low slump loss, which comprises the components by weight: 35 to 65% of high-efficiency naphthalene water reducing agent, 1.0 to 3.0% of calcium lignosulfonate, 30 to 60% of FEA swelling agent, 1.0 to 3.0% of saccharide retardation agent, 0.5 to 4.5% of sodium gluconate and less than 0.03% of air entraining agent. 3.5 to 5.0% of cement and additive material are added, the retardation time of the concrete can be adjusted to 10 to 24 hours at the environment temperature of 30 to 42 DEG C, and the present invention still has the pumpability when the slump constant retention value of 3 hours is larger than 140mm; furthermore, the present invention is favorable for preventing cold joint formation and hydration heat peak delay, and the present invention has the significant application meaning for bulky and large-area concrete engineering and particularly for concrete long distance transportation and hot weather construction when the environment temperature is higher than 30 DEG C.

Description

A kind of low slump loss concrete pumping agent
Technical field
The invention belongs to technical field of concrete additives.
Technical background
Development along with causes such as construction, traffic, water power, municipal administrations, complex structure, large-scale concrete works are more and more many, almost all require to use pump concretes, and usually wish that concrete has multiple functions such as slow setting, antifreeze, cracking resistance, antiseepage, anti-erosion simultaneously.Pump concrete is many by the stirring station centralizedly supply, be transported to the building site again, the time that is transported to the building site in medium above city generally needs 30min-2H, in this process, concrete slump incurs loss, to such an extent as to cannot or hardly pump in the building site, makes and builds interruption, member stays cold seam, causes engineering defect or quality accident.In summer, the rising of envrionment temperature more aggravates this slump-loss.Reduce the damage of collapsing for knowing clearly, people have carried out multiple research to high efficiency water reducing agent, plasticity-retention agent, pumping agent and addition material.Domestic pumping agent is many based on naphthalene water reducer, is applied as the master with under the normal temperature, decreases increase but collapse when being higher than 30 ℃; The product nominal that yet has does not have to collapse to decrease or collapse and decreases very for a short time, but practical application effect and nominal are far apart.At present, that is manufacturing experimently both at home and abroad has new and effective water reducers such as poly carboxylic acid system, sulfamate system, organic copolymer and graft copolymer, it is introduced that its protect plasticity is good, the damage of collapsing is little, but still product-free emerges.
Summary of the invention
Task of the present invention provides a kind of concrete pump-feed agent of low slump loss, is characterized in adding still pumping of pumping agent but need not secondary after haul distance is far away, concrete slump loss is less under duration, envrionment temperature condition with higher, is transported to the building site.
The present invention is achieved in that it is mixed by naphthalene series high-efficiency water-reducing agent (naphthalenesulfonate formaldehyde condensation compound), calcium lignin sulphonate, swelling agent, carbohydrate retardant, plasticity-retention agent and air entrapment agent and forms.The weight of each raw material is formed: water-reducing rate is not less than 26% the dispersed swelling agent 30%-60% of naphthalene series high-efficiency water-reducing agent 35%-65%, calcium lignin sulphonate 1.0%-3.0%, FEA, carbohydrate retardant 1.0%-3.0%, Sunmorl N 60S 0.5%-1.5% and is not higher than 0.03% air entrapment agent.Naphthalene series high-efficiency water-reducing agent such as NF, FDN or be preferably UNF, chaff class retardant such as sugared calcium or sugar.Being preferably naphthalene series high-efficiency water-reducing agent is Na 2SO 4Content is not higher than 8% NF, FDN or UNF.FEA disperses the SO of swelling agent 3Content is not less than 38% for good.
Know-why of the present invention is to utilize the high water reducing rate of naphthalene series high-efficiency water-reducing agent to obtain pumpability and guarantee concrete strength; Utilize the compound action of calcium lignin sulphonate and carbohydrate retardant to postpone hydrated cementitious speed, make the time of coagulation variable range big, for example 10H-24H; Utilize the protect plasticity of Sunmorl N 60S and to a certain degree water reducing ability, slow setting, and utilize adsorptivity, the water-retentivity of vesicular structure component in the FEA swelling agent, make water reducer under the slow setting condition homodisperse, play one's part to the full, make the water conservation component after after a while, can discharge moisture content automatically, thereby concrete have certain slump restorability; Air entrapment agent can improve concrete flowability.
Advantage of the present invention is tangible:
(1) system of mixing adds the 3.5%-5.0% of cement and addition material such as the total consumption of flyash during concrete, when the slump is 200mm-210mm originally, under 30 ℃ of-42 ℃ of envrionment temperatures, the slump through the time loss little, the 3H retention value is greater than 140mm, still has a pumpability.
(2) this pumping agent makes the concrete coagulating time variable range big, more competent building the time arranged, be beneficial to and avoid cold seam to form, postpone the time of occurrence on hydration heat peak, increasing large volume, big area, Highrise buildings during this built for the modern times, baroque concrete engineering construction is crucial.
(3) this pumping agent is applicable to C 50The concrete of following strength grade can be used with additives such as flyash, slag powders, silicon ash are reinforced, and consumption is the 3.5%-5.0 of cement and addition material total amount, and consumption is also higher when the envrionment temperature height, when strength grade of concrete is high; Workability of concrete is good, does not emanate, bleeding not.
(4) this pumping agent has micro-expansibility, but compensating concrete shrinks to a certain extent, plays to strengthen the cracking resistance effect.
(5) main raw material that uses of the present invention all has commercially availablely, is easy to obtain, and cost is lower, has implementation condition.
(6) domestic most of area all has envrionment temperature to be higher than 30 ℃ month, the big and medium-sized cities that engineering focuses mostly on again and is quite full in traffic, and concrete stirs has certain distance apart from the working-yard, and may pass through urban district, hours underway head.The present invention uses above-mentioned situation has remarkable value.
Embodiment
Embodiment:
The water-reducing rate of making the naphthalene series high-efficiency water-reducing agent of this pumping agent use should be not less than 26%, Na 2SO 4Content should not be higher than 8%; The SO of the dispersed swelling agent of FEA 3Content should be not less than 38%, and Shijiazhuang City function building materials company limited produces, and has commercially available; Sunmorl N 60S, calcium lignin sulphonate, carbohydrate retardant and air entrapment agent are the commercial goods.
Embodiment of the invention prescription is listed in table 1, and the concrete mix that the check pumping agent uses is listed in table 2, and the slump and ruggedness test the results are shown in table 3; Being examined concrete time of coagulation under the listed envrionment temperature in table is 12H～20H, and 7 days limited expansion rates are 0.017%～0.019% in the water.
Embodiment pumping agent prescription (%) table 1
Item is not A B C
Naphthalene series high-efficiency water-reducing agent 60 40 50
Swelling agent 35 55 45
Calcium lignin sulphonate 1.0 3.0 2.0
The carbohydrate retardant 3.0 1.5 2.0
Sunmorl N 60S 1.0 0.5 1.0
Air entrapment agent Trace Trace Trace
Naphthalene series high-efficiency water-reducing agent can be used NF, FDN or UNF; The carbohydrate retardant can be with sugared calcium or sugar.Press the JC473 standard code, the equal conformance with standard requirement of the conventional index assay of this pumping agent.
Check is with concrete mix table 2
No. Cement Flyash Sand Stone W/C Pumping agent numbering and consumption, %
01 1.0 2.03 2.58 0.60
02 1.0 2.03 2.58 0.48 B，3.50
03 0.8 0.20 1.31 1.96 0.36 C，4.00
04 0.75 0.25 1.03 1.42 0.31 A，4.50
Concrete inspection is table 3 as a result
Proportioning No. Envrionment temperature, ℃ The slump, mm Ultimate compression strength, MPa
Initially 1H 2H 3H 3d 7d 28d
01 33 90 80 35 0 20.6 22.6 30.1
02 33 205 185 165 150 26.6 41.0 42.2
03 38 210 190 180 165 28.0 42.3 49.0
04 42 210 185 170 160 31.8 47.6 58.3
In the time of 33 ℃, 3H, blank concrete slump has lost, add this pumping agent 3.5% after, as B, the slump still can reach 150mm, meets the index that requires of pump concrete; And, add this pumping agent, concrete ultimate compression strength in the 28 day length of time is improved more than the 10MPa.

Claims (3)

1, a kind of low slump loss concrete pumping agent is characterized in that it is that water-reducing rate is not less than 26% the dispersed swelling agent 30%-60% of naphthalene series high-efficiency water-reducing agent 35%-65%, FEA, calcium lignin sulphonate 1.0%-3.0%, carbohydrate retardant 1.0%-3.0%, Sunmorl N 60S 0.5%-1.5% and 0.03% following air entrapment agent that weight is formed.
2, low slump loss concrete pumping agent according to claim 1 is characterized in that naphthalene series high-efficiency water-reducing agent is Na 2SO 4Content is not higher than 8% NF, FDN or UNF.
3, low slump loss concrete pumping agent according to claim 1 is characterized in that the dispersed swelling agent SO of FEA 3Content is not less than 38%.
CNB011405341A 2001-11-10 2001-11-10 Low slump loss concrete pumping agent Expired - Fee Related CN1181005C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB011405341A CN1181005C (en) 2001-11-10 2001-11-10 Low slump loss concrete pumping agent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB011405341A CN1181005C (en) 2001-11-10 2001-11-10 Low slump loss concrete pumping agent

Publications (2)

Publication Number Publication Date
CN1357506A CN1357506A (en) 2002-07-10
CN1181005C true CN1181005C (en) 2004-12-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1331799C (en) * 2006-04-24 2007-08-15 蒋德双 Concrete pump and preparation method thereof

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CN1305799C (en) * 2005-10-19 2007-03-21 沈阳建筑大学 Concrete hydrating control
CN101337790B (en) * 2008-07-29 2011-05-11 金驥 Multifunctional shrinking-compensation concrete pump-feed agent
US8584864B2 (en) 2010-11-19 2013-11-19 Coldcrete, Inc. Eliminating screens using a perforated wet belt and system and method for cement cooling
CN102101762B (en) * 2010-12-29 2013-07-31 山东宏艺科技股份有限公司 Exposed concrete pumping agent and preparation method thereof
CN102101759B (en) * 2010-12-30 2012-08-22 广东水电二局股份有限公司 Concrete composite additive and preparation method and use thereof
CN102659339A (en) * 2012-04-11 2012-09-12 云南建工集团有限公司 Preparation method of sodium gluconate concrete super-retarding additive
US8845940B2 (en) 2012-10-25 2014-09-30 Carboncure Technologies Inc. Carbon dioxide treatment of concrete upstream from product mold
MX2015010109A (en) 2013-02-04 2016-04-20 Coldcrete Inc System and method of applying carbon dioxide during the production of concrete.
US10927042B2 (en) 2013-06-25 2021-02-23 Carboncure Technologies, Inc. Methods and compositions for concrete production
US9388072B2 (en) 2013-06-25 2016-07-12 Carboncure Technologies Inc. Methods and compositions for concrete production
US9376345B2 (en) 2013-06-25 2016-06-28 Carboncure Technologies Inc. Methods for delivery of carbon dioxide to a flowable concrete mix
US20160107939A1 (en) 2014-04-09 2016-04-21 Carboncure Technologies Inc. Methods and compositions for concrete production
WO2015123769A1 (en) 2014-02-18 2015-08-27 Carboncure Technologies, Inc. Carbonation of cement mixes
EP3129126A4 (en) 2014-04-07 2018-11-21 Carboncure Technologies Inc. Integrated carbon dioxide capture
CN104098289B (en) * 2014-07-22 2016-02-17 同济大学 A kind of collapse protection type concrete pump-feed agent of admixture CLT acid waste liquid
CN104926181A (en) * 2015-06-29 2015-09-23 湖州华仑助剂科技有限公司 Concrete enhancer
AU2017249444B2 (en) 2016-04-11 2022-08-18 Carboncure Technologies Inc. Methods and compositions for treatment of concrete wash water
CN106380102A (en) * 2016-08-30 2017-02-08 卓达新材料科技集团威海股份有限公司 High efficiency composite pumping aid for house 3D printing slurry
CN106565125A (en) * 2016-11-17 2017-04-19 武汉天衣集团有限公司 WHDF-G type pumping aid suitable for super high-rise concrete
US11958212B2 (en) 2017-06-20 2024-04-16 Carboncure Technologies Inc. Methods and compositions for treatment of concrete wash water
CN107188452A (en) * 2017-06-28 2017-09-22 常州建轩纺织品有限公司 A kind of concrete pumping antifreezing agent and preparation method thereof
CN110615633A (en) * 2018-06-20 2019-12-27 尧柏特种水泥技术研发有限公司 Benchmark naphthalene additive and method for evaluating cement performance
CN111253105A (en) * 2020-03-20 2020-06-09 中国能源建设集团西北电力建设工程有限公司 Concrete antifreezing pumping agent for high-alkali areas and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1331799C (en) * 2006-04-24 2007-08-15 蒋德双 Concrete pump and preparation method thereof

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