CN106630846A - Long-distance pumping concrete containing standard water reducing agent and application of concrete - Google Patents
Long-distance pumping concrete containing standard water reducing agent and application of concrete Download PDFInfo
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- CN106630846A CN106630846A CN201611234539.9A CN201611234539A CN106630846A CN 106630846 A CN106630846 A CN 106630846A CN 201611234539 A CN201611234539 A CN 201611234539A CN 106630846 A CN106630846 A CN 106630846A
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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
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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
- 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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides long-distance pumping concrete containing a standard water reducing agent and application of concrete and belongs to the field of concrete. The technical problems that the concrete is short in setting time, extremely fast in slump under a high pressure and low in peaceability and cannot be subjected to long-distance pumping can be solved. The long-distance pumping concrete containing the standard water reducing agent disclosed by the invention comprises the following components in parts by weight: 240-260 parts of cement, 150 parts of water, 85-135 parts of mineral powder, 105-125 parts of pulverized fuel ash, 1010-1020 parts of stones, 615-650 parts of waste residues, 105-145 parts of ferrous mill tailings, 5.2-5.3 parts of a standard polycarboxylate superplasticizer, 0.052-0.053 part of sodium alga acid and 0.0156-0.0159 part of xanthan gum. The concrete disclosed by the invention is high in compactness, fluidity and slump flow and low in production cost and is suitable for long-distance pumping of subway construction.
Description
Technical field
The invention belongs to concrete field, more particularly to a kind of long-distance pumping concrete containing standard type water reducer and its
Using.
Background technology
Concrete is the purposes most maximum a kind of material of wide, consumption in current architectural engineering, high, durable with compression strength
The features such as good, abundant raw material of property, cheap, simple production process.Concrete is to synthesize whole by aggregate is cementing by Binder Materials
The engineered composite material of body, is divided into job mix concrete and ready-mixed concrete again.Generic field ready-mixed concrete is existing due to it
Whipping process is with dust, noise be big, efficiency is low, and it is healthy to endanger workman, in addition to some special occasions, substantially
Do not use.Ready-mixed concrete is one of engineering raw material main in current construction.Ready-mixed concrete has compression strength high,
Steady quality, good endurance, it is convenient to construct, and the features such as environmentally-friendly sanitary, thus usage amount is increasing.
Cement water reducing agent is hindered by surface-active action, complexing, electrostatic repulsion forces or steric repulsion power etc.
Or the flocculent structure of destruction cement granules, there is peptizaiton to cement granules such that it is able to while reducing water consumption, improve
The mobility of concrete mix, it is ensured that the workability and intensity of concrete.Adopting iron ore tailings are iron ores in mining and process
The waste material of middle generation, due to not being reasonably utilized, the substantial amounts of accumulation of CHARACTERISTICS OF TAILINGS SAND occupies soil, and causes environmental pollution.
In recent years, with the quickening of urban construction process, subway construction also grows up therewith.Due to subway capital construction
Grow continuously and fast, to the performance requirement of concrete batching also more and more higher.And when subway distance is more than 250 meters, commonly
Easily there is the problems such as setting time is short, and damage of collapsing under high pressure is too fast, workability is poor in concrete, after leading to not pumping, or pumping
Without mobility, situations such as need building site workman to add water, construction quality is affected.
The content of the invention
The present invention proposes a kind of long-distance pumping concrete containing standard type water reducer and its application, is preparing concrete
During, by adding additive, rationally using waste material and the proportioning of adjustment each component, the concrete strength for being obtained is high,
Good fluidity, workability are excellent, are suitable to long-distance pumping.
In order to achieve the above object, an aspect of of the present present invention is mixed there is provided a kind of long-distance pumping containing standard type water reducer
Solidifying soil, counts by weight, including following components：Cement 240-260 parts, 150 parts of water, breeze 85-135 parts, flyash 105-
125 parts, stone 1010-1020 parts, waste residue 615-650 parts, iron tailings sand 105-145 parts, standard type polycarboxylate water-reducer 5.2-
5.3 parts, sodium alginate 0.052-0.053 parts, xanthans 0.0156-0.0159 parts.
Preferably, the water-reducing rate of the standard type polycarboxylate water-reducer is more than 30%, setting time difference for -90～+
120min。
Preferably, the long-distance pumping concrete containing standard type water reducer is counted by weight, including with the following group
Point：240 parts of cement, 150 parts of water, 135 parts of breeze, 105 parts of flyash, 1010 parts of stone, 650 parts of waste residue, iron tailings sand 105
Part, 5.2 parts of standard type polycarboxylate water-reducer, 0.052 part of sodium alginate, 0.0156 part of xanthans.
Preferably, the waste residue takes from the waste residue soil of subway construction engineering.
Preferably, the waste residue contains the stone flour that particle diameter is 0.16mm-4.75mm.
Preferably, the iron tailings sand is obtained by iron ore Jing after levigate, sorting, the particle diameter of iron tailings sand is 0.7mm-
2.2mm。
Preferably, the cement is P.I52.5 cement.
Preferably, the flyash is II grade of ash.
Preferably, the breeze is S95 level breezes, the specific surface area of the breeze is 400m2/ kg, 28 days activity indexs
For 95%, fluidity ratio is 100%.
Another aspect provides the length containing standard type water reducer described in a kind of technical scheme arbitrary as described above
Application of the distance pumping concrete in subway work, the long-distance pumping concrete containing standard type water reducer is used for subway
Long-distance pumping of the construction distance more than 250 meters.
Compared with prior art, advantages of the present invention and good effect are：
1st, the present invention is strengthened standard type polycarboxylate water-reducer and cement granules is divided by addition sodium alginate, xanthans
Effect and adhesive aggregation effect are dissipated, the consumption of standard type polycarboxylate water-reducer can be substantially reduced, while reducing the water consumption of concrete；
By above-mentioned adjustment, there is the Binder Materials of dispersion isolation concrete in standard type polycarboxylate water-reducer, and keep concrete
The composition of plasticity, the concrete for being obtained is not grabbed bottom, is not isolated, and with preferable mobility, is suitable to the long range of subway construction
Pumping.
2nd, the present invention replaces river sand, waste residue to derive from the waste residue soil of subway construction engineering using waste residue, iron tailings sand, iron
CHARACTERISTICS OF TAILINGS SAND is waste material of the iron ore in mining and process, and on the one hand both reasonable utilizations are solved during subway construction
The process problem of a large amount of waste residues soil and mining process clout, it is to avoid environmental pollution, it is ensured that engineering waste material is recycled；
On the other hand not only contain particle in gained waste residue and the composition of iron tailings sand, also contain powder, this level matches somebody with somebody mixture
Intensity is higher, good with the Binder Materials caking property such as cement；Furthermore, replace river sand using above-mentioned waste material, reduce the life of concrete
Produce cost.
3rd, the present invention replaces cement using flyash in great mixed amount and breeze, prevents aquation under high pressure too fast, and damage of collapsing is too fast, carries
High concrete mobility, the pumpability of Concrete Structure reduces production cost.
4th, the concrete strength height for being obtained of the invention, good fluidity, workability are excellent, are suitable to long-distance pumping；Meanwhile, should
The excellent in durability of concrete, can for a long time keep intensity and ensure the security for using.
Specific embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described enforcement
Example is only a part of embodiment of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model of present invention protection
Enclose.
The one side of the embodiment of the present invention provides a kind of long-distance pumping concrete containing standard type water reducer, by weight
Number meter, including following components：Cement 240-260 parts, 150 parts of water, breeze 85-135 parts, flyash 105-125 parts, stone
1010-1020 parts, waste residue 615-650 parts, iron tailings sand 105-145 parts, standard type polycarboxylate water-reducer 5.2-5.3 parts, marine alga
Sour sodium 0.052-0.053 parts, xanthans 0.0156-0.0159 parts.
In the above-described embodiments, by adding sodium alginate, xanthans, standard type polycarboxylate water-reducer is strengthened to cement
The peptizaiton and adhesive aggregation effect of grain, can substantially reduce the consumption of standard type polycarboxylate water-reducer, while reducing concrete
Water consumption；There is the Binder Materials of dispersion isolation adhesive aggregation concrete in the standard type polycarboxylate water-reducer, and keep concrete
The composition of plasticity, the concrete for being obtained is not grabbed bottom, is not isolated, with preferable mobility；Above-mentioned each thing in the present embodiment
Material is engaged, and the concrete strength height that obtained, good fluidity, excellent workability, good endurance, setting time are long, be suitable to it is long away from
Extra long distance pumping of the distance more than 250 meters is pumped in pumping, particularly subway construction.It is understood that in above-mentioned reality
In applying example, the addition of the sodium alginate can also be 0.0522,0.0525,0.0528 etc., the addition of the xanthans
Can also be 0.0157,0.0158 etc., those skilled in the art can be adjusted according to the situation of actual dispersion and adhesive aggregation.
In a preferred embodiment, the water-reducing rate of the standard type polycarboxylate water-reducer be more than 30%, setting time difference for-
90～+120min.From the standard type polycarboxylate water-reducer in above-described embodiment, its water-reducing rate is larger, can preferably to water
Mud particle plays a part of dispersion and adhesive aggregation, so as to ensureing the intensity of concrete and further reducing water consumption；At the same time it can also
Further extend the setting time of concrete, the mobility of Concrete Structure, but be not in grab the phenomenons such as bottom, isolation, more have
Beneficial to the long-distance pumping of concrete.The addition of the standard type polycarboxylate water-reducer is 5.2-5.3 parts, specifically can also be taken
5.22nd, 5.25,5.28 etc., the more preferable coagulation of performance can be obtained on the basis of water reducer addition is few from above range
Soil, but it is understood that, those skilled in the art can also add other amounts according to actual diminishing demand.
In a preferred embodiment, the long-distance pumping concrete containing standard type water reducer is counted by weight, bag
Include following components：240 parts of cement, 150 parts of water, 135 parts of breeze, 105 parts of flyash, 1010 parts of stone, 650 parts of waste residue, iron tail
105 parts of ore in sand form, 5.2 parts of standard type polycarboxylate water-reducer, 0.052 part of sodium alginate, 0.0156 part of xanthans.From said ratio
Component prepare concrete, the intensity of gained concrete is higher, mobility also preferably, can meet at the same meet use intensity with
The requirement of long-distance pumping.
In a preferred embodiment, the waste residue takes from the waste residue soil of subway construction engineering.In the present embodiment from upper
Waste residue is stated, the process problem of a large amount of waste residue soil during subway construction is not only solved, it is to avoid environmental pollution, it is ensured that engineering waste material
Recycle, realize the reasonable utilization of resource, and replace river sand using above-mentioned waste material, reduce the production of concrete into
This.
Used as preferred embodiment, the waste residue contains the stone flour that particle diameter is 0.16mm-4.75mm, the addition of waste residue
For 615-650 parts.From the waste residue of the above-mentioned type, wherein not only having particle, also powder can be further enhanced and iron tailings
The level of sand is with effect, the intensity of Concrete Structure.It is understood that the addition of above-mentioned waste residue can also for 620,625,
630th, 635,640,645 parts etc., the situation that those skilled in the art can be engaged according to waste residue with other materials is in above range
Inside it is adjusted.
In a preferred embodiment, the iron tailings sand is obtained by iron ore Jing after levigate, sorting, the particle diameter of iron tailings sand
For 0.7mm-2.2mm.In the present embodiment, from above-mentioned iron tailings stone, not only can make full use of remaining after iron ore processing
Material, realizes the reasonable utilization of resource, and the iron tailings sand from above-mentioned particle diameter preferably can be engaged with waste residue, improves mixed
The intensity of soil is coagulated, is conducive to the long-distance pumping of concrete.
In a preferred embodiment, the addition of the stone is 1010-1020 parts.In order to waste residue, iron is better achieved
The level of CHARACTERISTICS OF TAILINGS SAND and stone limits the addition of stone within the above range with effect, the intensity of Concrete Structure, but can be with
It is understood by, those skilled in the art can also within the above range be adjusted according to actual situation about coordinating, specifically can be with
Take 1012,1013,1015,1016,1018 etc..
In a preferred embodiment, the cement is P.I52.5 cement, and the addition of cement is 240-260 parts.From upper
Cement is stated, resistance to compression and the tension ability to bear of concrete can be ensured while cement consumption is reduced.But it is understood that,
The addition of required cement can be adjusted within the above range according to actual needs, specifically also can use 240,245,250,255,
260 parts etc..
In a preferred embodiment, the flyash is II grade of ash, and the addition of flyash is 105-125 parts.Using upper
Stating flyash can reduce water consumption, save substantial amounts of cement and fine aggregate, improve mobility, the cohesiveness of concrete batching system
And water-retaining property, the pumpability of Concrete Structure, the intensity of concrete is improved, on the premise of concrete performance is not reduced, reduce
Production cost；Additionally, the present invention compares existing C45P10 concrete replaces cement using flyash in great mixed amount, water is substantially reduced
The consumption of mud, and it is too fast to be prevented from aquation under high pressure, and damage of collapsing is too fast, improves concrete flowability.It is understood that right
In the addition of above-mentioned flyash, can also be specifically：105th, 110,115,120,125 parts etc., those skilled in the art may be used also
It is adjusted within the above range according to actual needs.
In a preferred embodiment, the breeze is S95 level breezes, and the specific surface area of the breeze is 400m2/ kg, 28 days
Activity index is 95%, and fluidity ratio is 100%., the addition of breeze can reduce water for 85-135 parts using above-mentioned breeze
Mud consumption, improves the workability of concrete, reduces the heat of hydration, promotes later strength, improves the internal structure of concrete, improves anti-
Resistance to corrosion is blended, the hydration rate of delay gelatinizing material extends the setting time of concrete；Additionally, the present invention is compared now
Some C45P10 concrete replace cement using large dosage breeze, with flyash collective effect, prevent aquation under high pressure too fast, collapse
Damage too fast, improve concrete flowability.It is understood that for the addition of the breeze, those skilled in the art may be used also
Carry out value within the above range as needed, for example, can be：90th, 95,100,110,115,120,125,130 parts etc..
The another aspect of the embodiment of the present invention provides the long-distance pumping concrete containing standard type water reducer and applies in subway
Apply in work, the long-distance pumping concrete containing standard type water reducer be used for subway work distance more than 250 meters length away from
From pumping.In the present embodiment, because the above-mentioned long-distance pumping concrete plasticity containing standard type water reducer is good, good fluidity,
And bottom is not grabbed, and not isolating, workability is good, and setting time is long, therefore in long-distance pumping, is particularly more than 250 meters in distance
In long-distance pumping, it is short to avoid the occurrence of setting time, damage of collapsing under high pressure is too fast and cause concrete to pump, or
The phenomenon such as need manually to add water without mobility after pumping, so as to ensure the quality of engineering.
In order to become apparent from introducing in detail employing standard type water reducer that the embodiment of the present invention provided and aggregate chips prepares
Long-distance pumping concrete, is described below in conjunction with specific embodiment.
Embodiment 1
The long-distance pumping concrete containing standard type water reducer that the present embodiment is provided, including following component：Cement
240kg, water 150kg, breeze 135kg, flyash 105kg, stone 1010kg, waste residue 650kg, iron tailings sand 105kg, standard type
Polycarboxylate water-reducer 5.2kg；Sodium alginate 0.052kg, xanthans 0.0156kg.Wherein, standard type polycarboxylate water-reducer subtracts
Water rate is more than 30%, and setting time difference is -90～+120min；Waste residue takes from the waste residue soil of subway construction engineering, is containing particle diameter
The stone flour of 0.16-4.75mm；The particle diameter of iron tailings sand is 0.7mm-2.2mm；Cement is P.I52.5 cement；Flyash is II grade
Ash；Breeze is S95 level breezes, and the specific surface area of the breeze is 400m2/ kg, activity index is 95% within 28 days, and fluidity ratio is
100%.
The each component for weighing is mixed, the gross weight of gained mixture is about 2400kg, and Binder Materials is
480kg, flyash replaces cement 21.9%, breeze to replace cement 28%, and water-cement ratio is 0.31, and standard type polycarboxylate water-reducer is mixed
Measure as 1.1%；Prepare by the mixture is stirred and obtain long-distance pumping concrete.
Embodiment 2
The long-distance pumping concrete containing standard type water reducer that the present embodiment is provided, including following component：Cement
250kg, water 150kg, breeze 105kg, flyash 110kg, stone 1020kg, waste residue 640kg, iron tailings sand 120kg, standard type
Polycarboxylate water-reducer 5.2kg；0.0525 part of sodium alginate, 0.0157 part of xanthans.The other the same as in Example 1.
The each component for weighing is mixed, the gross weight of gained mixture is about 2400kg, and Binder Materials is
465kg, flyash replaces cement 23.6%, breeze to replace cement 22.6%, and water-cement ratio is 0.32, standard type polycarboxylate water-reducer
Volume is 1.1%；Prepare by the mixture is stirred and obtain long-distance pumping concrete.
Embodiment 3
The long-distance pumping concrete containing standard type water reducer that the present embodiment is provided, including following component：Cement
260kg, water 150kg, breeze 85kg, flyash 125kg, stone 1015kg, waste residue 615kg, iron tailings sand 145kg, standard type
Polycarboxylate water-reducer 5.3kg；0.053 part of sodium alginate, 0.0159 part of xanthans.The other the same as in Example 1.
The each component for weighing is mixed, the gross weight of gained mixture is about 2400kg, and Binder Materials is
470kg, flyash replaces cement 26.5%, breeze to replace cement 18%, and water-cement ratio is 0.32, and standard type polycarboxylate water-reducer is mixed
Measure as 1.1%；Prepare by the mixture is stirred and obtain long-distance pumping concrete.
Comparative example
This comparative example is existing C45P10 concrete, including following component：Cement 384kg, flyash 66kg, breeze
99kg, river sand 647kg, stone 1023kg, water 170kg, water reducer 12.06kg.Water reducer is that high performance water reducing agent of polyocarboxy acid is (anti-
Freeze pumping compound), cement is 42.5 cement, and flyash is I levels ash, and breeze is S95 level breezes.
The each component for weighing is mixed, the gross weight of gained mixture is about 2400kg, and Binder Materials is
549kg, flyash replaces cement 12%, breeze to replace cement 18%, and water-cement ratio is 0.31, standard type polycarboxylate water-reducer volume
For 2.2%；Prepare by the mixture is stirred and obtain existing C45P10 concrete.
Performance test
The concrete that embodiment 1-3 and comparative example are obtained is carried out into performance test, test result is shown in Table 1.
The testing concrete performance table of table 1
From test result in table 1, compared with existing C45P10 concrete, the length that the embodiment of the present invention is obtained away from
From pump concrete, the slump is larger, and divergence is significantly increased, and performance change is little after 2 hours, good fluidity, workability
Excellent, setting time is substantially elongated, so as to meet the requirement of long-distance pumping；Simultaneously cement consumption is reduced, and flyash and breeze are used
Amount increases, and reasonably with the use of waste residue, iron tailings sand and stone, the concrete for being obtained has higher intensity.In addition,
The Chloride Diffusion Coefficient in Concrete that the embodiment of the present invention is obtained is little, excellent in durability, service life can more than 100 years, and
Existing normal concrete can only use 50-70, hence it is evident that better than existing concrete.
Claims (10)
1. the long-distance pumping concrete of standard type water reducer is contained, it is characterised in that counted by weight, including following components：
Cement 240-260 parts, 150 parts of water, breeze 85-135 parts, flyash 105-125 parts, stone 1010-1020 parts, waste residue 615-
650 parts, iron tailings sand 105-145 parts, standard type polycarboxylate water-reducer 5.2-5.3 parts, sodium alginate 0.052-0.053 parts are yellow
Virgin rubber 0.0156-0.0159 parts.
2. the long-distance pumping concrete containing standard type water reducer according to claim 1, it is characterised in that the standard
The water-reducing rate of type polycarboxylate water-reducer is more than 30%, and setting time difference is -90～+120min.
3. the long-distance pumping concrete containing standard type water reducer according to claim 1 and 2, it is characterised in that by weight
Amount number meter, including following components：240 parts of cement, 150 parts of water, 135 parts of breeze, 105 parts of flyash, 1010 parts of stone, waste residue
650 parts, 105 parts of iron tailings sand, 5.2 parts of standard type polycarboxylate water-reducer, 0.052 part of sodium alginate, 0.0156 part of xanthans.
4. the long-distance pumping concrete containing standard type water reducer according to claim 1 and 2, it is characterised in that described
Waste residue takes from the waste residue soil of subway construction engineering.
5. the long-distance pumping concrete containing standard type water reducer according to claim 4, it is characterised in that the waste residue
Containing the stone flour that particle diameter is 0.16mm-4.75mm.
6. the long-distance pumping concrete containing standard type water reducer according to claim 1 and 2, it is characterised in that described
Iron tailings sand is obtained by iron ore Jing after levigate, sorting, and the particle diameter of iron tailings sand is 0.7mm-2.2mm.
7. the long-distance pumping concrete containing standard type water reducer according to claim 1 and 2, it is characterised in that described
Cement is P.I52.5 cement.
8. the long-distance pumping concrete containing standard type water reducer according to claim 1 and 2, it is characterised in that described
Flyash is II grade of ash.
9. the long-distance pumping concrete containing standard type water reducer according to claim 1 and 2, it is characterised in that described
Breeze is S95 level breezes, and the specific surface area of the breeze is 400m2/ kg, activity index is 95% within 28 days, and fluidity ratio is
100%.
10. the long-distance pumping concrete containing standard type water reducer described in claim 1-9 any one is in subway work
Application, it is characterised in that the long-distance pumping concrete containing standard type water reducer be used for subway work distance be more than 250
The long-distance pumping of rice.
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| CN107827416A (en) * | 2017-11-21 | 2018-03-23 | 北京可耐可特新材料有限公司 | A kind of high intensity radiation proof pumpable concrete and preparation method thereof |
| CN107827416B (en) * | 2017-11-21 | 2020-08-25 | 北京可耐可特新材料有限公司 | High-strength radiation-proof pumpable concrete and preparation method thereof |
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Application publication date: 20170510 |
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