CN109592949A - Meet the concrete and its pumping method of super high pump-conveying - Google Patents

Meet the concrete and its pumping method of super high pump-conveying Download PDF

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Publication number
CN109592949A
CN109592949A CN201910122905.9A CN201910122905A CN109592949A CN 109592949 A CN109592949 A CN 109592949A CN 201910122905 A CN201910122905 A CN 201910122905A CN 109592949 A CN109592949 A CN 109592949A
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China
Prior art keywords
concrete
pump
water
conveying
sand
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Chinese (zh)
Inventor
林智峰
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Shaanxi Hongji Concrete Components Co Ltd
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Shaanxi Hongji Concrete Components Co Ltd
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Priority to CN201910122905.9A priority Critical patent/CN109592949A/en
Publication of CN109592949A publication Critical patent/CN109592949A/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/003—Methods for mixing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
    • F16L3/08—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
    • F16L3/12—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing comprising a member substantially surrounding the pipe, cable or protective tubing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/08—Pipe-line systems for liquids or viscous products
    • F17D1/088—Pipe-line systems for liquids or viscous products for solids or suspensions of solids in liquids, e.g. slurries
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/08—Pipe-line systems for liquids or viscous products
    • F17D1/14—Conveying liquids or viscous products by pumping
    • 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
    • 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Reciprocating Pumps (AREA)

Abstract

The present invention relates to concrete pumping technique field, the concrete and its pumping method for meeting super high pump-conveying are disclosed, concrete includes the raw material (kg/m of following components3): cement 350, sand 756, stone 924, admixture 60, polycarboxylate water-reducer 16.5, water 150, fine aggregate 120, BTC functional form additive 3.3；Pumping method includes that pipe section is set: horizontal pump line connects delivery pump, and horizontal pump line is provided with shut-off valve at the position delivery pump 8-12m, and horizontal pump line is fixed on several concrete piers by built-in fitting, and vertical pump line is fixed on wall by several clamps；The junction of horizontal pump line and vertical pump line is fixed by concrete block.The addition of water-retaining component and the use of BTC functional form additive in high performance water reducing agent of polyocarboxy acid, successfully reduce high-strength concrete stickiness, it successfully solves the problems, such as to influence concrete strength after flyash is added simultaneously, realizes the super high pump-conveying of strong concrete.

Description

Meet the concrete and its pumping method of super high pump-conveying
Technical field
The present invention relates to concrete pumping technique fields, more particularly to meet concrete and its pumping side of super high pump-conveying Method.
Background technique
Ultra-high pump concrete technology generally refers to the modern concrete pumping technology that pumping height is more than 200m, for height For high-grade concrete super high pump-conveying of the degree greater than 200m, concrete strength height, large viscosity, therefore pumping pressure is higher, pump It send construction particularly difficult, brings a series of technical problems for needing to be inquired into entire construction casting process.
Authorization Notice No. be the Chinese invention patent of CN105884300B disclose it is a kind of being capable of 620 meters of super high pump-conveyings C30 self-compacting concrete and preparation method thereof, raw material components and the mass fraction proportion of concrete are as follows: 6.5%-7.5% cement, 3.5%-4.0% flyash, 1.1%-2.1% miberal powder, 3.5%-5.0% viscosity modifier, 76% aggregate, 0.5%-0.6% Polycarboxylate water-reducer, 6.8%-6.9% mixing water；Aggregate is made of sand and stone, and sand coarse aggregate ratio range is 42%-48%；Sand is in Sand and fine sand are constituted, and stone is made of great Shi and gravelstone, and middle grain fineness number modulus is 2.3-2.5, and the fine sand fineness modulus is 1.6-1.8；Big stone grain diameter is 10-20mm, and the gravelstone partial size is 5-10mm.
But for C60, C50 and C35 high-strength concrete, stickiness is larger, still can not solve by adopting the above technical scheme Certainly bleeding problem solves the technical problem of super high pump-conveying.
Summary of the invention
To solve the above-mentioned problems, an object of the present disclosure is to provide the concrete for meeting super high pump-conveying, not only drops The low stickiness of high-strength concrete, realizes the pumping of high-strength concrete, in addition, the generation of thermal cracking is effectively controlled, with And it ensure that the intensity of concrete.
Above-mentioned purpose of the invention is realized by technical solution once:
The concrete for meeting super high pump-conveying, the raw material (kg/m including following components3):
It is 0.28 for water-cement ratio, wherein the tolerance of above-mentioned raw material cumulative calculation are as follows: cement and admixture be ± 1%, sand, stone and fine aggregate are ± 2%, and polycarboxylate water-reducer, BTC functional form additive and water are ± 1%.
By using above-mentioned technical proposal, BTC functional form additive is a kind of to significantly improve concrete inner structure circle Face transition region, mechanical property, working performance, cracking resistance, anti-permeability performance and the durability of General Promotion concrete.Its working machine Reason is: by the way that chemical action is complexed, re-uniting the dispersion of cement base finely-powdered minerals material, improves concrete mortar and enrich degree, change The adhesive aggregation performance of kind concrete；Shielding action can be crossed, the absorption and swelliong power of clay are inhibited, improves concrete complexity raw material With the compatibility performance of water-reducing agent；By weakening hydrone polarity, concrete bulla is eliminated, enhances microvesicle quantity, effectively guarantees The intensity and durability of concrete.
The concrete for meeting super high pump-conveying, the raw material (kg/m including following components3):
It is 0.31 for water-cement ratio, wherein the tolerance of above-mentioned raw material cumulative calculation are as follows: cement and admixture be ± 1%, sand, stone and fine aggregate are ± 2%, and polycarboxylate water-reducer, BTC functional form additive and water are ± 1%.
By using above-mentioned technical proposal, BTC functional form additive is a kind of to significantly improve concrete inner structure circle Face transition region, mechanical property, working performance, cracking resistance, anti-permeability performance and the durability of General Promotion concrete.Its working machine Reason is: by the way that chemical action is complexed, re-uniting the dispersion of cement base finely-powdered minerals material, improves concrete mortar and enrich degree, change The adhesive aggregation performance of kind concrete；Shielding action can be crossed, the absorption and swelliong power of clay are inhibited, improves concrete complexity raw material With the compatibility performance of water-reducing agent；By weakening hydrone polarity, concrete bulla is eliminated, enhances microvesicle quantity, effectively guarantees The intensity and durability of concrete.
The concrete for meeting super high pump-conveying, the raw material (kg/m including following components3):
It is 0.40 for water-cement ratio, wherein the tolerance of above-mentioned raw material cumulative calculation are as follows: cement and admixture be ± 1%, sand, stone and fine aggregate are ± 2%, and polycarboxylate water-reducer, BTC functional form additive and water are ± 1%.
By using above-mentioned technical proposal, BTC functional form additive is a kind of to significantly improve concrete inner structure circle Face transition region, mechanical property, working performance, cracking resistance, anti-permeability performance and the durability of General Promotion concrete.Its working machine Reason is: by the way that chemical action is complexed, re-uniting the dispersion of cement base finely-powdered minerals material, improves concrete mortar and enrich degree, change The adhesive aggregation performance of kind concrete；Shielding action can be crossed, the absorption and swelliong power of clay are inhibited, improves concrete complexity raw material With the compatibility performance of water-reducing agent；By weakening hydrone polarity, concrete bulla is eliminated, enhances microvesicle quantity, effectively guarantees The intensity and durability of concrete.
In some embodiments, using P042.5 cement；Fineness modulus is 3.0-3.2, and clay content is 2.0%-3%'s Medium coarse sand；5-25mm continuous grading rubble, and its crush index is 7-9%；Admixture uses flyash and miberal powder, wherein powder The fineness of coal ash is 20%-25%, loss on ignition 3%-5%, water demand ratio 100%-105%, and miberal powder uses S95 grades, 7d activity Index is 70%-78%, and 28d activity index is 95%-99%.
By using above-mentioned technical proposal, double-doped (flyash+miberal powder) concrete passes through trial mix, and concrete workability obtains Improve, stickiness is reduced, and also reduce because of the incorporation of flyash intensity.
In some embodiments, the sand includes river sand and Machine-made Sand, wherein the content of Machine-made Sand is 140- 160kg/m3。
By using above-mentioned technical proposal, adds the concrete slump of Machine-made Sand, divergence, holds time test not It is affected, and can be improved the intensity of concrete.
In some embodiments, carboxymethyl cellulose water-retaining component is added in the polycarboxylate water-reducer, it is described poly- The setting time of carboxylic acid water reducer is 12-24h.
It by using above-mentioned technical proposal, is added in additive water-retaining component (carboxymethyl cellulose), water conservation is added The Water-saving effect of the concrete of component increases, and reduces the loss of inside concrete moisture content, reduce concrete slump through when The occurrence of losing, while greatly reducing concrete water bleeding.
In some embodiments, concrete slump SL >=220SL/mm, divergence SF >=500SF/mm are controlled, is inverted SL emptying time t≤20s of the slump.
By using above-mentioned technical proposal, it can guarantee the super high pump-conveying of concrete.
The present invention second is designed to provide the pumping method of concrete, weakens the release in pumping procedure, realizes The pumping of high-strength concrete.
Above-mentioned purpose of the invention is realized by technical solution once:
The pumping method of concrete, using the above-mentioned concrete for meeting super high pump-conveying, comprising steps of
S1: concrete mixing, mixing time are controlled in 120-180s；
S2: pipe section is set, comprising: horizontal pump line, vertical pump line and the curved pump line for being connected to corner, the horizontal pump Pipe connects delivery pump, and the horizontal pump line is provided with shut-off valve at the position the delivery pump 8-12m, and the horizontal pump line is logical It crosses built-in fitting to be fixed on several concrete piers, the vertical pump line is fixed on wall by several clamps；The horizontal pump It manages and is fixed with the junction of vertical pump line by concrete block；
S3: pumping construction.
By using above-mentioned technical proposal,
In some embodiments, described convey pumps out 1/3- of the length of horizontal pump line at pumping hole not less than pumping height 1/4 comprising curved pump line reduced length；The delivery pump is greater than 3m with away from the distance between nearest curved pump line.
By using above-mentioned technical proposal, the shaking of pipeline when reducing pumping reduces pressure release, guarantees to realize superelevation pump It send.
In some embodiments, the delivery pump uses high pressure 28MPa Vehicle loaded pump.
By using above-mentioned technical proposal, there is higher reliability and superpower pumpability.
In conclusion advantageous effects of the invention are as follows:
1. the addition of water-retaining component and the use of BTC functional form additive, successfully drop in high performance water reducing agent of polyocarboxy acid Low high-strength concrete stickiness, while successfully solving the problems, such as to influence concrete strength after flyash is added, it realizes high-strength Spend the super high pump-conveying of concrete；
2. passing through the optimization of match ratio, the adjustment of poly-carboxylic high-performance additive setting time, raw material quality, concrete Effective control of slump SL, effectively controls the generation of thermal cracking；
3. the correct selection of pumping equipment and the Reasonable Arrangement of live pump line, realize high-strength high-performance concrete Super High Pumping.
Detailed description of the invention
The structural schematic diagram that pipe section is set in Fig. 1 concrete pumping method provided by the invention.
In figure: 1, horizontal pump line；2, vertical pump line；3, curved pump line；11, concrete pier；12, concrete block.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
The present invention discloses the concrete and its pumping method that meet super high pump-conveying.
It is the strong concrete that strength grade is respectively C60, C50 and C35.
Embodiment 1:
Meet the concrete of super high pump-conveying disclosed in the embodiment of the present invention 1, strength grade is the high-intensitive coagulation of C60 Soil, the raw material (kg/m including following components3):
It is 0.28 for water-cement ratio；
Wherein,
The selection of cement is mainly from blending amount of mixture material, the cement mortar strength three in the adaptability of cement and admixture, cement The selection of aspect progress cement:
By the detection of three famous brand cement, intensity index meets the regulation of national standard GB175-2007.But with In terms of the adaptability of polycarboxylate water-reducer, for Ji east cement through repeated detection, net slurry detection divergence SF is more stable and without bleeding.Yao Cypress cement is big by net slurry detection divergence SF difference, and has bleeding situation, unstable with the adaptability of polycarboxylate water-reducer.Sea Spiral shell cement 28d intensity value is slightly lower compared with other Liang Ge producers.So it is Ji Dong that this time Super High concrete pumping, which selectes cement, PO42.5 cement.In the actual production process, such as there is the case where cement and admixture poor compatibility, spare Yao cypress will be used P.O42.5 cement, to solve the problems, such as poor compatibility.
Sand selects the mixed sand of Lantian medium coarse sand and Machine-made Sand, and medium coarse sand fineness modulus is 3.1, clay content 2.0% Medium coarse sand, other indexs meet GB14684-2011 standard requirements, and the fineness modulus of Machine-made Sand is 2.9, crush index It is 24%, content of stone powder 10%, the content of Machine-made Sand is 150kg/m3；
Stone selects Fuping 5-25mm continuous grading rubble, and its crush index is 8%；
Admixture is double-doped using flyash and miberal powder, wherein the fineness of flyash is 21.8%, loss on ignition 3.1%, needs water Ratio 101% is measured, miberal powder uses S95 grades of Hancheng Dongchang, and 7d activity index is that 78%, 28d activity index is 99%, and index meets GB/T18046-2008 standard requirements；
Additive selection is particularly important to the performance of concrete, the detection of additive cement paste:
According to testing result, Shaanxi Heng Ze HAZA high performance water reducing agent of polyocarboxy acid is selected；Zhong Tieyiju industrial and trading company JL- GSS high performance water reducing agent of polyocarboxy acid is as alternative additive.Its index meets JG/T223-2007 standard requirements.Polycarboxylic acids diminishing Carboxymethyl cellulose water-retaining component is added in agent, the setting time of the polycarboxylate water-reducer controls in 18h.
Embodiment 2:
Meet the concrete of super high pump-conveying disclosed in the embodiment of the present invention 2, strength grade is the high-intensitive coagulation of C60 Soil, the raw material (kg/m including following components3):
It is 0.28 for water-cement ratio；
Wherein,
Cement uses P042.5 cement；
Sand selects the mixed sand of Lantian medium coarse sand and Machine-made Sand, and medium coarse sand fineness modulus is 3.0, clay content 3.0% Medium coarse sand, other indexs meet GB14684-2011 standard requirements, and the fineness modulus of Machine-made Sand is 2.9, crush index It is 24%, content of stone powder 10%, the content of Machine-made Sand is 150kg/m3；
Stone uses 5-25mm continuous grading rubble, and its crush index is 7%；
Admixture is double-doped using flyash and miberal powder, wherein the fineness of flyash is 20%, loss on ignition 3%, water demand ratio 100%, miberal powder uses S95 grades, and 7d activity index is that 70%, 28d activity index is 95%；
Carboxymethyl cellulose water-retaining component is added in polycarboxylate water-reducer, the setting time of the polycarboxylate water-reducer is controlled System is in 12h.
Embodiment 3:
Meet the concrete of super high pump-conveying disclosed in the embodiment of the present invention 3, strength grade is the high-intensitive coagulation of C60 Soil, the raw material (kg/m including following components3):
It is 0.28 for water-cement ratio；
Wherein,
Cement uses P042.5 cement；
Sand selects the mixed sand of Lantian medium coarse sand and Machine-made Sand, and medium coarse sand fineness modulus is 3.2, clay content 2.5% Medium coarse sand, other indexs meet GB14684-2011 standard requirements, and the fineness modulus of Machine-made Sand is 2.9, crush index It is 24%, content of stone powder 10%, the content of Machine-made Sand is 150kg/m3；
Stone uses 5-25mm continuous grading rubble, and its crush index is 9%；
Admixture is double-doped using flyash and miberal powder, wherein the fineness of flyash is 25%, loss on ignition 5%, water demand ratio 105%, miberal powder uses S95 grades, and 7d activity index is that 74%, 28d activity index is 97%；
Carboxymethyl cellulose water-retaining component is added in polycarboxylate water-reducer, the setting time of the polycarboxylate water-reducer is controlled System is for 24 hours.
Embodiment 4:
Meet the concrete of super high pump-conveying disclosed in the embodiment of the present invention 4, strength grade is the high-intensitive coagulation of C50 Soil, the raw material (kg/m including following components3):
It is 0.31 for water-cement ratio；
Wherein,
Cement uses P042.5 cement；
Sand selects the mixed sand of Lantian medium coarse sand and Machine-made Sand, and medium coarse sand fineness modulus is 3.1, clay content 2.0% Medium coarse sand, other indexs meet GB14684-2011 standard requirements, and the fineness modulus of Machine-made Sand is 2.9, crush index It is 24%, content of stone powder 10%, the content of Machine-made Sand is 150kg/m3；
Stone uses 5-25mm continuous grading rubble, and its crush index is 8%；
Admixture is double-doped using flyash and miberal powder, wherein the fineness of flyash is 21.8%, loss on ignition 3.1%, needs water Ratio 101% is measured, miberal powder uses S95 grades, and 7d activity index is that 78%, 28d activity index is 99%；
Carboxymethyl cellulose water-retaining component is added in polycarboxylate water-reducer, the setting time of the polycarboxylate water-reducer is controlled System is in 18h.
Embodiment 5:
Meet the concrete of super high pump-conveying disclosed in the embodiment of the present invention 5, strength grade is the high-intensitive coagulation of C50 Soil, the raw material (kg/m including following components3):
It is 0.31 for water-cement ratio；
Wherein,
Cement uses P042.5 cement；
Sand selects the mixed sand of Lantian medium coarse sand and Machine-made Sand, and medium coarse sand fineness modulus is 3.0, clay content 3.0% Medium coarse sand, other indexs meet GB14684-2011 standard requirements, and the fineness modulus of Machine-made Sand is 2.9, crush index It is 24%, content of stone powder 10%, the content of Machine-made Sand is 150kg/m3；
Stone uses 5-25mm continuous grading rubble, and its crush index is 7%；
Admixture is double-doped using flyash and miberal powder, wherein the fineness of flyash is 22%, loss on ignition 3%, water demand ratio 103%, miberal powder uses S95 grades, and 7d activity index is that 72%, 28d activity index is 96%；
Carboxymethyl cellulose water-retaining component is added in polycarboxylate water-reducer, the setting time of the polycarboxylate water-reducer is controlled System is in 14h.
Embodiment 6:
Meet the concrete of super high pump-conveying disclosed in the embodiment of the present invention 6, strength grade is the high-intensitive coagulation of C50 Soil, the raw material (kg/m including following components3):
It is 0.31 for water-cement ratio；
Wherein,
Cement uses P042.5 cement；
Sand selects the mixed sand of Lantian medium coarse sand and Machine-made Sand, and medium coarse sand fineness modulus is 3.2, and clay content is 3% Medium coarse sand, other indexs meet GB14684-2011 standard requirements, and the fineness modulus of Machine-made Sand is 2.9, and crush index is 24%, content of stone powder 10%, the content of Machine-made Sand is 150kg/m3；
Stone uses 5-25mm continuous grading rubble, and its crush index is 9%；
Admixture is double-doped using flyash and miberal powder, wherein the fineness of flyash is 23%, loss on ignition 4%, water demand ratio 102%, miberal powder uses S95 grades, and 7d activity index is that 74%, 28d activity index is 97%；
Carboxymethyl cellulose water-retaining component is added in polycarboxylate water-reducer, the setting time of the polycarboxylate water-reducer is controlled System is in 16h.
Embodiment 7:
Meet the concrete of super high pump-conveying disclosed in the embodiment of the present invention 7, strength grade is the high-intensitive coagulation of C35 Soil, the raw material (kg/m including following components3):
It is 0.40 for water-cement ratio；
Wherein,
Cement uses P042.5 cement；
Sand selects the mixed sand of Lantian medium coarse sand and Machine-made Sand, and medium coarse sand fineness modulus is 3.1, clay content 2.0% Medium coarse sand, other indexs meet GB14684-2011 standard requirements, and the fineness modulus of Machine-made Sand is 2.9, crush index It is 24%, content of stone powder 10%, the content of Machine-made Sand is 150kg/m3；
Stone uses 5-25mm continuous grading rubble, and its crush index is 8%；
Admixture is double-doped using flyash and miberal powder, wherein the fineness of flyash is 21.8%, loss on ignition 3.1%, needs water Ratio 101% is measured, miberal powder uses S95 grades, and 7d activity index is that 78%, 28d activity index is 99%；
Carboxymethyl cellulose water-retaining component is added in polycarboxylate water-reducer, the setting time of the polycarboxylate water-reducer is controlled System is in 18h.
Embodiment 8:
Meet the concrete of super high pump-conveying disclosed in the embodiment of the present invention 8, strength grade is the high-intensitive coagulation of C35 Soil, the raw material (kg/m including following components3):
It is 0.40 for water-cement ratio；
Wherein,
Cement uses P042.5 cement；
Sand selects the mixed sand of Lantian medium coarse sand and Machine-made Sand, and medium coarse sand fineness modulus is 3.2, clay content 3.0% Medium coarse sand, other indexs meet GB14684-2011 standard requirements, and the fineness modulus of Machine-made Sand is 2.9, crush index It is 24%, content of stone powder 10%, the content of Machine-made Sand is 150kg/m3；
Stone uses 5-25mm continuous grading rubble, and its crush index is 7%；
Admixture is double-doped using flyash and miberal powder, wherein the fineness of flyash is 24%, loss on ignition 4%, water demand ratio 104%, miberal powder uses S95 grades, and 7d activity index is that 76%, 28d activity index is 97%；
Carboxymethyl cellulose water-retaining component is added in polycarboxylate water-reducer, the setting time of the polycarboxylate water-reducer is controlled System is in 16h.
Embodiment 9:
Meet the concrete of super high pump-conveying disclosed in the embodiment of the present invention 9, strength grade is the high-intensitive coagulation of C35 Soil, the raw material (kg/m including following components3):
It is 0.40 for water-cement ratio；
Wherein,
Cement uses P042.5 cement；
Sand selects the mixed sand of Lantian medium coarse sand and Machine-made Sand, and medium coarse sand fineness modulus is 3.1, clay content 2.0% Medium coarse sand, other indexs meet GB14684-2011 standard requirements, and the fineness modulus of Machine-made Sand is 2.9, crush index It is 24%, content of stone powder 10%, the content of Machine-made Sand is 150kg/m3；
Stone uses 5-25mm continuous grading rubble, and its crush index is 9%；
Admixture is double-doped using flyash and miberal powder, wherein the fineness of flyash is 24%, loss on ignition 4%, water demand ratio 104%, miberal powder uses S95 grades, and 7d activity index is that 77%, 28d activity index is 98%；
Carboxymethyl cellulose water-retaining component is added in polycarboxylate water-reducer, the setting time of the polycarboxylate water-reducer is controlled System is in 20h.
Prepare concrete using above-mentioned raw materials, need to reach pumping requirements, it is necessary to control concrete slump SL >= 220SL/mm, divergence SF >=500SF/mm are inverted slump SL emptying time t≤20s.
In order to detect to BTC, laboratory is on the basis of cement mortar detects, by BTC by cement consumption 0.06% is not added in cement mortar, and not plus the strength of cement mortar of BTC compares.It is come the addition for verifying BTC with this The no performance to concrete makes moderate progress:
After testing, it mixes BTC strength of cement mortar and is higher by 4-6MPa than normal strength of cement mortar, and performance is stablized.Cause This reduces the gel material content of concrete with this, solves the problems, such as the big influence pumping of concrete stickiness；
In addition, adding the concrete slump of Machine-made Sand, divergence, holding time test and be not affected by influence, the slump SL:240mm, divergence 660mm, it is inverted slump cone emptying time: 8s, three indexs meet control and require, and concrete Intensity has small size raising.
The invention also discloses the pumping method of concrete, the above-mentioned concrete for meeting super high pump-conveying is used, including with Lower step:
S1: concrete mixing, mixing time are controlled in 160s；
S2: pipe section is set, as shown in Figure 1, pipeline includes: horizontal pump line 1, vertical pump line 2 and is connected to corner Curved pump line 3, horizontal pump line 1 connect delivery pump (not shown), and in this embodiment of the invention, delivery pump uses high pressure 28MPa Vehicle loaded pump, horizontal pump line 1 are provided with shut-off valve at the position delivery pump 8-12m, and conveying pumps out horizontal pump line at pumping hole 1 length be not less than pumping height 1/3-1/4 comprising curved 3 reduced length of pump line, delivery pump with away from nearest curved pump The distance between pipe 3 is greater than 3m；Horizontal pump line 1 is fixed on several concrete piers 11 by built-in fitting, if vertical pump line 2 passes through Dry clamp is fixed on wall, and the junction of horizontal pump line 1 and vertical pump line 2 is fixed by concrete block 12, therefore, reduces pump The shaking of pipeline when sending reduces pressure release, guarantees to realize super high pump-conveying；
S3: pumping construction.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it It is interior.

Claims (10)

1. meeting the concrete of super high pump-conveying, which is characterized in that the raw material (kg/m including following components3):
It is 0.28 for water-cement ratio, wherein the tolerance of above-mentioned raw material cumulative calculation are as follows: cement and admixture are ± 1%, sand Son, stone and fine aggregate are ± 2%, and polycarboxylate water-reducer, BTC functional form additive and water are ± 1%.
2. meeting the concrete of super high pump-conveying, which is characterized in that the raw material (kg/m including following components3):
It is 0.31 for water-cement ratio, wherein the tolerance of above-mentioned raw material cumulative calculation are as follows: cement and admixture are ± 1%, sand Son, stone and fine aggregate are ± 2%, and polycarboxylate water-reducer, BTC functional form additive and water are ± 1%.
3. meeting the concrete of super high pump-conveying, which is characterized in that the raw material (kg/m including following components3):
It is 0.40 for water-cement ratio, wherein the tolerance of above-mentioned raw material cumulative calculation are as follows: cement and admixture are ± 1%, sand Son, stone and fine aggregate are ± 2%, and polycarboxylate water-reducer, BTC functional form additive and water are ± 1%.
4. the concrete according to claim 1 to 3 for meeting super high pump-conveying, which is characterized in that use P042.5 water Mud；Fineness modulus is 3.0-3.2, and clay content is the medium coarse sand of 2.0%-3%；5-25mm continuous grading rubble, and its crushing refers to It is designated as 7-9%；Admixture use flyash and miberal powder, wherein the fineness of flyash be 20%-25%, loss on ignition 3%-5%, Water demand ratio 100%-105%, miberal powder use S95 grades, and 7d activity index is 70%-78%, and 28d activity index is 95%- 99%.
5. the concrete according to claim 4 for meeting super high pump-conveying, which is characterized in that the sand includes river sand and machine Sand processed, wherein the content of Machine-made Sand is 140-160kg/m3。
6. the concrete according to claim 5 for meeting super high pump-conveying, which is characterized in that add in the polycarboxylate water-reducer Added with carboxymethyl cellulose water-retaining component, the setting time of the polycarboxylate water-reducer is 12-24h.
7. the concrete according to claim 6 for meeting super high pump-conveying, which is characterized in that control concrete slump SL >= 220SL/mm, divergence SF >=500SF/mm are inverted slump SL emptying time t≤20s.
8. the pumping method of concrete, which is characterized in that use the concrete as claimed in claim 6 for meeting super high pump-conveying, packet Include step:
S1: concrete mixing, mixing time are controlled in 120-180s；
S2: pipe section is set, comprising: horizontal pump line (1), vertical pump line (2) and the curved pump line (3) for being connected to corner, it is described Horizontal pump line (1) connects delivery pump, and the horizontal pump line (1) is provided with shut-off valve at the position the delivery pump 8-12m, institute It states horizontal pump line (1) to be fixed on several concrete piers (11) by built-in fitting, the vertical pump line (2) is solid by several clamps Due on wall；The junction of the horizontal pump line (1) and vertical pump line (2) is fixed by concrete block (12)；
S3: pumping construction.
9. the pumping method of concrete according to claim 8, which is characterized in that the conveying pumps out level at pumping hole and pumps The length for managing (1) is not less than the 1/3-1/4 of pumping height comprising curved pump line (3) reduced length；The delivery pump with apart from it The distance between nearest curved pump line (3) is greater than 3m.
10. the pumping method of concrete according to claim 8, which is characterized in that the delivery pump uses high pressure 28MPa Vehicle loaded pump.
CN201910122905.9A 2019-02-18 2019-02-18 Meet the concrete and its pumping method of super high pump-conveying Pending CN109592949A (en)

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Application publication date: 20190409