CN106316296A - Formulation suitable for grain reserve warehouse silo slips form construction concrete - Google Patents

Formulation suitable for grain reserve warehouse silo slips form construction concrete Download PDF

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Publication number
CN106316296A
CN106316296A CN201610718798.2A CN201610718798A CN106316296A CN 106316296 A CN106316296 A CN 106316296A CN 201610718798 A CN201610718798 A CN 201610718798A CN 106316296 A CN106316296 A CN 106316296A
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CN
China
Prior art keywords
concrete
parts
water
formulation
formula
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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.)
Pending
Application number
CN201610718798.2A
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Chinese (zh)
Inventor
王晓春
余雪峰
吴玉彪
李秀泉
王治平
徐文良
张爱萍
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Zhejiang Construction Engineering Group Co Ltd
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Zhejiang Construction Engineering Group Co Ltd
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Publication date
Application filed by Zhejiang Construction Engineering Group Co Ltd filed Critical Zhejiang Construction Engineering Group Co Ltd
Priority to CN201610718798.2A priority Critical patent/CN106316296A/en
Publication of CN106316296A publication Critical patent/CN106316296A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/04Portland cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention discloses a formulation suitable for grain reserve warehouse silo slip form construction concrete and the concrete formulation is prepared from the following components, by weight, 330-400 parts of cement, 700-750 parts of sand, 1000-1050 parts of stones, 170-190 parts of water, 6.6-8.0 parts of an admixture, and 60-70 parts of pulverized fuel ash. The formulation is scientific and reasonable in component proportion and can meet various requirements of pumping and pouring grain warehouse silo slip form construction concrete and concrete pumping and pouring requirements. By the concrete with the formulation, the concrete mold stripping strength is better controlled; the concrete has the advantages of good fluidity, cohesiveness and water holding capacity during concrete construction, low slump time loss and strong pumpability; besides molded concrete can be ensured in strength and has the glossy surface, and chromatic aberration of the molded concrete can meet the quality requirement of grain reserve silo concrete.

Description

A kind of concrete formulation being applicable to grain depot silo slip form construction
Technical field
The invention belongs to the technical field of construction, particularly relate to one and be applicable to grain depot silo slip form construction Concrete formulation.
Background technology
Grain depot silo is mainly used for grain reserves, and grain belongs to national strategy material.In order to ensure grain storage Standby, the air-tightness of grain depot silo is directly connected to the effect of grain storage, and therefore grain depot silo engineering is to air-tightness Require higher.The construction quality of grain depot silo concrete is most important, particularly the control of distress in concrete.
Slding form operation is the cast-in-place concrete utilizing a determined power to make template system slide along concrete surface and being formed The general name of construction method.It has, and speed of application is fast, mechanization degree is high, structural integrity is good, save the features such as material, sliding formwork System can flexible assembling and recycling, not only efficiently but also environmental protection.Slding form operation needs uninterruptedly to work continuously for 24 hours, daytime Night, concrete was had opposite impacts on again by different environment, and the mould unloading strength of concrete is particularly important.Mould unloading strength is too low then Avalanche is easily occurred to affect sliding mode system stability in the large and safety;As mould unloading strength is too high, it is easily generated bulkhead drawing crack existing As, have a strong impact on quality and the surface perception of concrete.The method that a lot of units in charge of construction control is that technical staff is according to self Construction experience judges, is pressed by range estimation, finger at the construction field (site), the method such as time difference infers the strong of concrete immediately Degree.Therefore anthropic factor is very big, and difficult quality is controlled.
Grain depot silo wall concrete requires to be clear-water concrete, and construction requires that clear-water concrete possesses well The feature such as mobility, cohesiveness, uniformity and water-retaining property.Require after concrete formation dense surface, bubble little and less, colourless Difference, intensity reaches requirement.Therefore grain depot silo wall Difference Control is extremely important.
Existing clear-water concrete seldom uses Slip Form Construction Technique, owing to component formula is unreasonable, and uses slding form operation The concrete of technology have being difficult to control to of mould unloading strength, distress in concrete easily produces, the more difficult control of surface quality, aberration The defect such as greatly, slump gradual loss is big.
Summary of the invention
In order to overcome the defect in prior art, the invention provides one and be applicable to grain depot silo slip form construction Concrete formulation.The concrete using this formula can preferably control concrete mould unloading strength, stream when having concrete construction The advantages such as dynamic property is good, cohesiveness is good, good water-retaining property, and slump gradual loss is little, pumpability is strong, can guarantee that concrete depanning is strong Degree, lustrous surface is good, and aberration meets the prescription of provision store cylinder concrete.
It is applicable to the concrete formulation of grain reserves silo slip form construction, it is characterised in that the group of described concrete formulation Divide and parts by weight be:
Preferably, cement is P O42.5 cement, and the presetting period must not be early than 45 minutes, and it is little that final setting time must not be later than 10 Time.Use high grade cement can improve intensity, strengthen frost resistance, reduce drying shrinkage, improve wearability relatively, to improve carbonization resistance etc. every Cement performance.Guarantee concrete strength, mobility, cohesiveness, water-retaining property.
Preferably, Sha Wei II district medium sand, modulus of fineness is 2.3-3.0, clay content < 3%, clod content < 1%.The present invention Can be selected for mixed sand to be optimized by fine aggregate and the gloss of ratio optimization adjustable concrete and chromaticness, improve concrete and easily Property, pumpability, reduce shrink, prevent crack from producing.
Preferably, rubble, specification 5~31.5mm continuous grading, color even, clay content < 1%, clod content < 0.5%, Elongated particles < 15%.
Preferably, the Acidity of Aikalinity of described water is neutral.
Preferably, described additive is polycarboxylate water-reducer, water-reducing rate > 20%.High-quality and efficient polycarboxylic acids SMS is used to delay Solidifying type water reducer, can reduce the water consumption of concrete, controls service behaviour and the loss of slump of concrete, makes initial slump degree Reaching more than 170mm, after 1 hour, slump is at more than 140mm, and has low bleed, not the advantage such as bleeding.
Preferably, described flyash is II grade of fineness of pulverized-coal ash (0.045mm square hole screen tails over)≤25%, loss on ignition≤ 8%, water content≤1%, sulfur trioxide content≤3%.Using flyash can improve concrete performance as admixture, utilization is mixed With the advantage of material, improve the workability of concrete, water-retaining property, stability.
Grain depot silo slip form construction mix Design and raw material quality control are very strict, newly mix mixed Solidifying soil must have fabulous workability, absolutely not allows phenomenon laminated segregation occur.The raw material place of production must be unified, water used Mud as far as possible with same producer with a batch of;Sand, the color and luster of stone and grain composition are uniform.
The present invention prepares the formula of grain depot silo slip form construction concrete, and component ratio is scientific and reasonable, has mixed Good fluidity during solidifying soil construction, workability are good, good water-retaining property, the advantages such as slump gradual loss is little, and pumpability is strong, its workability Concrete pumping can be met and pour requirement, and can preferably control the mould unloading strength of concrete, can reach not bleeding, not from Analysis, amount of contraction are little, and concrete compaction after molding, texture are strong, it is ensured that concrete strength;Lustrous surface is good, and aberration meets grain storage The prescription of standby storehouse silo clear-water concrete.
Detailed description of the invention
The preparation C35 grain depot each component requirements of silo slip form construction concrete is as follows:
(1) cement uses the P O42.5 cement that tiger group He Jia mountain, rivers and mountains Cement Co., Ltd produces.Leading indicator: just The solidifying time must not be early than 45min, and final setting time must not be later than 600min, and stability is qualified.Meet GB175-2007 " general silicic acid Salt cement " the P O42.5 cement quality requirement of standard.
(2) sand uses Jiangxi medium sand, color even, modulus of fineness 2.7, and grating is good, clay content < 3%, clod content < 1%, meet GB/T14684 2001 " building sand ", JGJ52-2006 " regular concrete sand stone quality and method of inspection mark Accurate " prescription.
(3) stone uses the trueest rubble in Qujiang District, Quzhou City, specification 5~31.5mm continuous grading, color even, clay content < 1%, clod content < 0.5%, elongated particles < 15%, meet GB/T14685 2001 " cobble for building, rubble ", The prescription of JGJ52-2006 " regular concrete sand stone quality and test method standard ".
(4) hydromining drinking water, soda acid is checked in neutrality.
(5) additive uses the polycarboxylic acid series high efficiency water reducing agent of river Yamanaka Tsuyoshi building materials company limited, and model specification is that SMS delays Solidifying type, water-reducing rate > 20% and contain the compositions such as appropriate slow setting, bleed, froth breaking.
(6) II grade of flyash of the Juhua Group Co. that flyash employing color is deeper, leading indicator: fineness (0.045mm Square hole screen tails over)≤25%, loss on ignition≤8%, water content≤1%, sulfur trioxide content≤3%.Meet GB1596-2005 II grade of flyash requirement of regulation in " flyash in cement and concrete ".
It is below the formula of 5 kinds of different proportions:
Formula Cement (kg) Sand (kg) Stone (kg) Water (kg) Additive (kg) Flyash (kg)
1 336 705 1037 180 7.5 64
2 380 720 1010 175 7.8 60
3 396 715 1048 185 8.0 60
4 348 746 1030 189 7.2 68
5 359 736 1043 177 7.3 63
Parameters by the clear-water concrete of above-mentioned 5 kinds of formula preparation is as shown in the table
Concrete flowability, water-retaining property, intensity are satisfied by requirement as can be seen from the above table, and the slump after 60min reaches More than 140mm, after meeting concrete pumping requirement, particularly 8h, concrete mould unloading strength reaches more than 0.20 and meets GB50113- 2005 " sleiding form engineering legislation " the 6.6.15 article requirement.

Claims (7)

1. the concrete formulation being applicable to grain depot silo slip form construction, it is characterised in that the group of described concrete Divide and parts by weight be:
Cement 330~400 parts
Sand 700~750 parts
Stone 1000~1050 parts
Water 170~190 parts
Additive 6.6~8.0 parts
Flyash 60~70 parts.
2. formula as claimed in claim 1, it is characterised in that described cement is P O42.5 cement, and the presetting period must not be early In 45 minutes, final setting time must not be later than 10 hours.
3. formula as claimed in claim 1, it is characterised in that described Sha Wei II district medium sand, modulus of fineness is 2.3-3.0, contains Mud amount < 3%, clod content < 1%.
4. formula as claimed in claim 1, it is characterised in that described stone is rubble, specification 5~31.5mm continuous grading, face Color is uniform, clay content < 1%, and clod content < 0.5%, elongated particles < 15%.
5. formula as claimed in claim 1, it is characterised in that the Acidity of Aikalinity of described water is neutral.
6. the formula as described in claim 1, it is characterised in that described additive is polycarboxylic acids SMS retarding water reducer, Water-reducing rate > 20%.
7. the formula as described in claim 1, it is characterised in that described flyash is II grade of fineness of pulverized-coal ash≤25% of fineness, Loss on ignition≤8%, water content≤1%, sulfur trioxide content≤3%.
CN201610718798.2A 2016-08-24 2016-08-24 Formulation suitable for grain reserve warehouse silo slips form construction concrete Pending CN106316296A (en)

Priority Applications (1)

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CN201610718798.2A CN106316296A (en) 2016-08-24 2016-08-24 Formulation suitable for grain reserve warehouse silo slips form construction concrete

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Application Number Priority Date Filing Date Title
CN201610718798.2A CN106316296A (en) 2016-08-24 2016-08-24 Formulation suitable for grain reserve warehouse silo slips form construction concrete

Publications (1)

Publication Number Publication Date
CN106316296A true CN106316296A (en) 2017-01-11

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007314397A (en) * 2006-05-29 2007-12-06 Denki Kagaku Kogyo Kk Cement concrete composition for slip form construction and slip form construction using it
CN101955342A (en) * 2010-10-19 2011-01-26 浙江省建工集团有限责任公司 Formula for preparing white faced as-cast finish concrete composition
CN102515658A (en) * 2011-11-24 2012-06-27 中铁隧道集团有限公司 Common pipe ditch cast-in-place extrusion flow state concrete lining material
CN103102116A (en) * 2013-02-04 2013-05-15 陕西煤业化工建设(集团)有限公司 Concrete for shear wall structure
CN103113055A (en) * 2013-02-04 2013-05-22 陕西煤业化工建设(集团)有限公司 Concrete for sliding film construction of silo structure
CN105541226A (en) * 2015-12-24 2016-05-04 邢台建工商品混凝土有限公司 Concrete for slip form concreting and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007314397A (en) * 2006-05-29 2007-12-06 Denki Kagaku Kogyo Kk Cement concrete composition for slip form construction and slip form construction using it
CN101955342A (en) * 2010-10-19 2011-01-26 浙江省建工集团有限责任公司 Formula for preparing white faced as-cast finish concrete composition
CN102515658A (en) * 2011-11-24 2012-06-27 中铁隧道集团有限公司 Common pipe ditch cast-in-place extrusion flow state concrete lining material
CN103102116A (en) * 2013-02-04 2013-05-15 陕西煤业化工建设(集团)有限公司 Concrete for shear wall structure
CN103113055A (en) * 2013-02-04 2013-05-22 陕西煤业化工建设(集团)有限公司 Concrete for sliding film construction of silo structure
CN105541226A (en) * 2015-12-24 2016-05-04 邢台建工商品混凝土有限公司 Concrete for slip form concreting and preparation method thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
中国科学技术协会学会管理中心学术专家委员会 等编: "《新时期全国优秀学术成果文献》", 31 October 2002 *
夏志成等: "《混凝土结构原理与应用》", 31 October 2015 *

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