CN106082820A - A kind of preparation technology of anti-crack concrete - Google Patents
A kind of preparation technology of anti-crack concrete Download PDFInfo
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- CN106082820A CN106082820A CN201610431534.9A CN201610431534A CN106082820A CN 106082820 A CN106082820 A CN 106082820A CN 201610431534 A CN201610431534 A CN 201610431534A CN 106082820 A CN106082820 A CN 106082820A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- 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
- C04B2111/74—Underwater applications
Abstract
The present invention relates to technical field of concrete, the preparation technology of a kind of anti-crack concrete；Comprise the following steps: (1) concrete proportioning designs, (2) mixture stirs, whipping temp is 15 40 DEG C, (3) concreting: concrete and high-strength imitative steel fibre net alternately inject template, and concrete carries out smearing pressure in this process and processes；(4) concrete cutting and polishing: use levigation method polishing, and add polishing medium；The anti-crack concrete preparation method of the present invention, have raw material be easy to get, the feature such as with low cost and function admirable, reasonably combined, with high admixture usage ratio, low-cementitious material usage ratio as principal character by each component；Ultimately form that workability is good, intensity is high, crack resistance is good, impervious good and the concrete of the applicable seabed operating mode of life-span length.
Description
Technical field
The present invention relates to technical field of concrete, the preparation technology of a kind of anti-crack concrete.
Background technology
It is known that the construction of seabed tunnel is the project under construction the most complicated in current transport development, standard is the highest；Tunnel
Road concrete does not allows hazardness crack occur, and its maximum length of embedment is at about-40m.Seabed tunnel many employings batch production is pre-
Tunneling boring processed pours, and one-time-concreting concrete square amount reaches about 3400m3, and design strength is that 56d reaches C50, simultaneously for ensureing early
The form removal of age, it is desirable to 3d intensity reaches C30.Owing to tunnel concrete structure needs to bear high pressure sea water effect for a long time, therefore
Anti-permeability performance, cracking resistance and the long term life of tunnel concrete is proposed requirements at the higher level.
Traditional anti-crack concrete, during producing preparation, product is caused quality to need to improve by technogenic influence,
And dispensing, mat formation, molding, the operation such as cutting are difficult to accomplish to organically combine.
Summary of the invention
The technical problem to be solved in the present invention is: overcome deficiency of the prior art, it is provided that the system of a kind of anti-crack concrete
Standby technique, the anti-crack concrete that the method prepares has stable performance, the strong advantage of crack resistance.
For solving above-mentioned technical problem, the technical solution used in the present invention is as follows:
The preparation technology of a kind of anti-crack concrete, comprises the following steps:
(1) concrete proportioning design, its mass parts composition as follows: cement 100-200 part, fine aggregate stone 80-120 part,
Coarse aggregate stone 100-200 part, rubber grain 10-60 part, flyash 50-80 part, SILICA FUME 12-30 part, daiamid epoxy chlorine
Propane resin 10-15 part, extender 8-16 part, water 200-300 part；
(2) mixture stirs, and whipping temp is 15-40 DEG C,
(3) concreting: concrete and high-strength imitative steel fibre net alternately inject template, and concrete is carried out in this process
Smear pressure to process；
(4) concrete cutting and polishing: use levigation method polishing, and add polishing medium.
Further, the mass parts composition of described extender is as follows: vitriol acid iron cement 4-5 part, calcining coal gangue 6-12 part, stone
Cream powder 20-30 part, calcium stearate 6-10 part, nano barium titanate aluminum fiber 3.6-7.8 part, pitchstone ore in sand form powder 12-25 part, meerschaum
4-6 part, polyvinyl alcohol 6-10 part, hydroxypropylcelluloether ether 3.6-5.2 part, retardation water reducing agent 1.8-3.8 part, potassium sulfate 1.2-
3.8 parts, ammonium sulfate 0.8-2.4 part.
Further, described pitchstone ore in sand form powder is S105 level pitchstone ore in sand form powder.
Further, the mass parts composition of described retardation water reducing agent is as follows: polycarboxylate superplasticizer mother liquor 40-45 part, guarantor are collapsed
Agent 6-10 part, Borax 2.5-3.5 part, plasticity-maintaining agent 4-6 part, water 35-40 part.
Further, the solid content of described polycarboxylate superplasticizer mother liquor is 38%；The collapse solid content of agent of described guarantor is 35%.
Further, described Gypsum Fibrosum powder selects desulfurization gypsum powder and the mixture of dephosphorization Gypsum Fibrosum powder, and its mass ratio is 1:
1.5, fineness is 250 mesh.
Further, described calcium stearate is by calcium chloride and stearic acid and the mixture reaction generation water of Palmic acid sodium salt
Washing is removed sodium chloride and is obtained.
Further, its mass parts composition is as follows: vitriol acid iron cement 4 parts, calcining coal gangue 10 parts, Gypsum Fibrosum powder 25 parts, tristearin
Acid calcium 7.2 parts, nano barium titanate aluminum fiber 4.8 parts, 12.8 parts of pitchstone ore in sand form powder, meerschaum 4.8 parts, polyvinyl alcohol 6.8 parts, hydroxyl
4.2 parts of propyl cellulose ether, retardation water reducing agent 2.4 parts.
Further, the mass parts composition of this anti-crack concrete is as follows: cement 160 parts, 100 parts of fine aggregate stone, thick bone
Work stone 160 parts, rubber grain 40 parts, 65 parts of flyash, SILICA FUME 16 parts, polyamine epichlorohydrin resin 12 parts, expansion
Agent 10 parts, 250 parts of water.
Further, a diameter of 0.6-2mm of fiber in high-strength imitative steel fibre net in described step (3).
Technical scheme is used to provide the benefit that:
The anti-crack concrete preparation technology of the present invention, have raw material be easy to get, the feature such as with low cost and function admirable, logical
Cross the reasonably combined of each component, with high admixture usage ratio, low-cementitious material usage ratio as principal character；Ultimately form work
The property made is good, intensity is high, crack resistance is good, impervious good and the concrete of the applicable seabed operating mode of life-span length；
With the addition of expansion agent for composite type concrete, its mineralogical composition is reasonable, each component Bulking Time, speed and swell increment with
Concrete reaction is shunk and strength development is coordinated mutually, has good swelling properties；Volume is low, and construction usage is convenient, with rear alkali-free-
Aggregate reaction, does not affect early strength and later strength, does not increase slump loss, it is adaptable to anti-crack and anti-seepage requires height
Water-proof concrete engineering and the water-proof concrete engineering of pumping construction.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the invention will be further described.
Embodiment 1
The preparation technology of a kind of anti-crack concrete, comprises the following steps:
(1) concrete proportioning design, its mass parts composition is as follows: cement 100 parts, 80 parts of fine aggregate stone, coarse aggregate stone
Son 100 parts, rubber grain 10 parts, 50 parts of flyash, SILICA FUME 12 parts, polyamine epichlorohydrin resin 10 parts, extender 8
Part, 200 parts of water；
(2) mixture stirs, and whipping temp is 15-18 DEG C,
(3) concreting: concrete and high-strength imitative steel fibre net alternately inject template, and concrete is carried out in this process
Smear pressure to process；A diameter of 0.6mm of fiber in high-strength imitative steel fibre net；
(4) concrete cutting and polishing: use levigation method polishing, and add polishing medium.
Wherein, the mass parts composition of extender is as follows: vitriol acid iron cement 4 parts, calcining coal gangue 6 parts, Gypsum Fibrosum powder 20 parts, tristearin
Acid calcium 6 parts, nano barium titanate aluminum fiber 3.6 parts, 12 parts of pitchstone ore in sand form powder, meerschaum 4 parts, polyvinyl alcohol 6 parts, hydroxy propyl cellulose
Element 3.6 parts of ether, retardation water reducing agent 1.8 parts, potassium sulfate 1.2 parts, 0.8 part of ammonium sulfate.
Wherein, pitchstone ore in sand form powder is S105 level pitchstone ore in sand form powder.
Wherein, the mass parts composition of retardation water reducing agent is as follows: polycarboxylate superplasticizer mother liquor 40 parts, guarantor are collapsed agent 6 parts, Borax
2.5 parts, plasticity-maintaining agent 4 parts, 35 parts of water, the solid content of polycarboxylate superplasticizer mother liquor is 38%；The collapse solid content of agent of described guarantor is
35%.
Wherein, Gypsum Fibrosum powder selects desulfurization gypsum powder and the mixture of dephosphorization Gypsum Fibrosum powder, and its mass ratio is 1:1.5, and fineness is
250 mesh.
Wherein, calcium stearate is generated by the mixture reaction of calcium chloride with stearic acid and Palmic acid sodium salt and washes removal with water
Sodium chloride obtains.
Embodiment 2
The preparation technology of a kind of anti-crack concrete, comprises the following steps:
(1) concrete proportioning design, its mass parts composition is as follows: cement 120 parts, 100 parts of fine aggregate stone, coarse aggregate stone
Son 120 parts, rubber grain 20 parts, 55 parts of flyash, SILICA FUME 15 parts, polyamine epichlorohydrin resin 12 parts, extender 9
Part, 210 parts of water；
(2) mixture stirs, and whipping temp is 18-20 DEG C,
(3) concreting: concrete and high-strength imitative steel fibre net alternately inject template, and concrete is carried out in this process
Smear pressure to process；A diameter of 0.8mm of fiber in high-strength imitative steel fibre net；
(4) concrete cutting and polishing: use levigation method polishing, and add polishing medium.
Wherein, extender mass parts composition as follows: vitriol acid iron cement 4.2 parts, calcining coal gangue 6.2 parts, Gypsum Fibrosum powder 21 parts,
Calcium stearate 6.2 parts, nano barium titanate aluminum fiber 4.2 parts, 13.8 parts of pitchstone ore in sand form powder, meerschaum 4.5 parts, polyvinyl alcohol 6.5
Part, hydroxypropylcelluloether ether 4.2 parts, retardation water reducing agent 2.1 parts, potassium sulfate 1.6 parts, 1.2 parts of ammonium sulfate.
Wherein, pitchstone ore in sand form powder is S105 level pitchstone ore in sand form powder.
Wherein, the mass parts composition of retardation water reducing agent is as follows: polycarboxylate superplasticizer mother liquor 42 parts, guarantor are collapsed agent 7.5 parts, Borax
2.8 parts, plasticity-maintaining agent 4.5 parts, 36 parts of water, the solid content of polycarboxylate superplasticizer mother liquor is 38%；The collapse solid content of agent of described guarantor is
35%.
Wherein, Gypsum Fibrosum powder selects desulfurization gypsum powder and the mixture of dephosphorization Gypsum Fibrosum powder, and its mass ratio is 1:1.5, and fineness is
250 mesh.
Wherein, calcium stearate is generated by the mixture reaction of calcium chloride with stearic acid and Palmic acid sodium salt and washes removal with water
Sodium chloride obtains.
Embodiment 3
The preparation technology of a kind of anti-crack concrete, comprises the following steps:
(1) concrete proportioning design, its mass parts composition is as follows: cement 160 parts, 100 parts of fine aggregate stone, coarse aggregate stone
Son 160 parts, rubber grain 40 parts, 65 parts of flyash, SILICA FUME 16 parts, polyamine epichlorohydrin resin 12 parts, extender 10
Part, 250 parts of water；
(2) mixture stirs, and whipping temp is 20-25 DEG C,
(3) concreting: concrete and high-strength imitative steel fibre net alternately inject template, and concrete is carried out in this process
Smear pressure to process；A diameter of 1.2mm of fiber in high-strength imitative steel fibre net；
(4) concrete cutting and polishing: use levigation method polishing, and add polishing medium.
Wherein, the mass parts composition of extender is as follows: vitriol acid iron cement 4 parts, calcining coal gangue 10 parts, Gypsum Fibrosum powder 25 parts, firmly
Fat acid calcium 7.2 parts, nano barium titanate aluminum fiber 4.8 parts, 12.8 parts of pitchstone ore in sand form powder, meerschaum 4.8 parts, polyvinyl alcohol 6.8 parts,
Hydroxypropylcelluloether ether 4.2 parts, retardation water reducing agent 2.4 parts.
Wherein, pitchstone ore in sand form powder is S105 level pitchstone ore in sand form powder.
Wherein, the mass parts composition of retardation water reducing agent is as follows: polycarboxylate superplasticizer mother liquor 42 parts, guarantor are collapsed agent 8 parts, Borax 3
Part, plasticity-maintaining agent 5 parts, 36 parts of water, the solid content of polycarboxylate superplasticizer mother liquor is 38%；The collapse solid content of agent of described guarantor is 35%.
Wherein, Gypsum Fibrosum powder selects desulfurization gypsum powder and the mixture of dephosphorization Gypsum Fibrosum powder, and its mass ratio is 1:1.5, and fineness is
250 mesh.
Wherein, calcium stearate is generated by the mixture reaction of calcium chloride with stearic acid and Palmic acid sodium salt and washes removal with water
Sodium chloride obtains.
Embodiment 4
The preparation technology of a kind of anti-crack concrete, comprises the following steps:
(1) concrete proportioning design, its mass parts composition is as follows: cement 180 parts, 100 parts of fine aggregate stone, coarse aggregate stone
Son 180 parts, rubber grain 50 parts, 75 parts of flyash, SILICA FUME 25 parts, polyamine epichlorohydrin resin 12 parts, extender 15
Part, 280 parts of water；
(2) mixture stirs, and whipping temp is 25-30 DEG C,
(3) concreting: concrete and high-strength imitative steel fibre net alternately inject template, and concrete is carried out in this process
Smear pressure to process；A diameter of 1.6mm of fiber in high-strength imitative steel fibre net；
(4) concrete cutting and polishing: use levigation method polishing, and add polishing medium.
Wherein, the mass parts composition of extender is as follows: vitriol acid iron cement 4.5 parts, calcining coal gangue 11.5 parts, Gypsum Fibrosum powder 28
Part, calcium stearate 8.5 parts, nano barium titanate aluminum fiber 7.2 parts, 24 parts of pitchstone ore in sand form powder, meerschaum 5.8 parts, polyvinyl alcohol 8.8
Part, hydroxypropylcelluloether ether 5 parts, retardation water reducing agent 3.6 parts, potassium sulfate 3.6 parts, 2.2 parts of ammonium sulfate.
Wherein, pitchstone ore in sand form powder is S105 level pitchstone ore in sand form powder.
Wherein, the mass parts composition of retardation water reducing agent is as follows: polycarboxylate superplasticizer mother liquor 42 parts, guarantor are collapsed agent 8.5 parts, Borax
3 parts, plasticity-maintaining agent 5.5 parts, 38 parts of water, the solid content of polycarboxylate superplasticizer mother liquor is 38%；The collapse solid content of agent of described guarantor is
35%.
Wherein, Gypsum Fibrosum powder selects desulfurization gypsum powder and the mixture of dephosphorization Gypsum Fibrosum powder, and its mass ratio is 1:1.5, and fineness is
250 mesh.
Wherein, calcium stearate is generated by the mixture reaction of calcium chloride with stearic acid and Palmic acid sodium salt and washes removal with water
Sodium chloride obtains.
Embodiment 5
The preparation technology of a kind of anti-crack concrete, comprises the following steps:
(1) concrete proportioning design, its mass parts composition is as follows: cement 200 parts, 120 parts of fine aggregate stone, coarse aggregate stone
Son 200 parts, rubber grain 60 parts, 80 parts of flyash, SILICA FUME 30 parts, polyamine epichlorohydrin resin 15 parts, extender 16
Part, 300 parts of water；
(2) mixture stirs, and whipping temp is 35-40 DEG C,
(3) concreting: concrete and high-strength imitative steel fibre net alternately inject template, and concrete is carried out in this process
Smear pressure to process；A diameter of 2mm of fiber in high-strength imitative steel fibre net；
(4) concrete cutting and polishing: use levigation method polishing, and add polishing medium.
Wherein, the mass parts composition of extender is as follows: vitriol acid iron cement 5 parts, calcining coal gangue 12 parts, Gypsum Fibrosum powder 30 parts, firmly
Fat acid calcium 10 parts, nano barium titanate aluminum fiber 7.8 parts, 25 parts of pitchstone ore in sand form powder, meerschaum 6 parts, polyvinyl alcohol 10 parts, hydroxypropyl
Cellulose ether 5.2 parts, retardation water reducing agent 3.8 parts, potassium sulfate 3.8 parts, 2.4 parts of ammonium sulfate.
Wherein, pitchstone ore in sand form powder is S105 level pitchstone ore in sand form powder.
Wherein, the mass parts composition of retardation water reducing agent is as follows: polycarboxylate superplasticizer mother liquor 45 parts, guarantor are collapsed agent 10 parts, Borax
3.5 parts, plasticity-maintaining agent 6 parts, 40 parts of water, the solid content of polycarboxylate superplasticizer mother liquor is 38%；The collapse solid content of agent of described guarantor is
35%.
Wherein, Gypsum Fibrosum powder selects desulfurization gypsum powder and the mixture of dephosphorization Gypsum Fibrosum powder, and its mass ratio is 1:1.5, and fineness is
250 mesh.
Wherein, calcium stearate is generated by the mixture reaction of calcium chloride with stearic acid and Palmic acid sodium salt and washes removal with water
Sodium chloride obtains.
The concrete of each embodiment (with reference to GB50448-2008) application effect actual measurement, data are shown in Table 1:
Table 1
Embodiment 3 is preferred implementation.
With the above-mentioned desirable embodiment according to the present invention for enlightenment, by above-mentioned description, relevant staff is complete
Entirely can carry out various change and amendment in the range of without departing from this invention technological thought.The technology of this invention
The content that property scope is not limited in description, it is necessary to determine its technical scope according to right.
Claims (10)
1. the preparation technology of an anti-crack concrete, it is characterised in that comprise the following steps:
(1) concrete proportioning design, its mass parts composition is as follows: cement 100-200 part, fine aggregate stone 80-120 part, thick bone
Work stone 100-200 part, rubber grain 10-60 part, flyash 50-80 part, SILICA FUME 12-30 part, polyamideepichlorohydrin
Resin 10-15 part, extender 8-16 part, water 200-300 part；
(2) mixture stirs, and whipping temp is 15-40 DEG C,
(3) concreting: concrete and high-strength imitative steel fibre net alternately inject template, and concrete carries out smearing pressure in this process
Process；
(4) concrete cutting and polishing: use levigation method polishing, and add polishing medium.
The preparation technology of a kind of anti-crack concrete the most according to claim 1, it is characterised in that: the quality of described extender
Part composition is as follows: vitriol acid iron cement 4-5 part, calcining coal gangue 6-12 part, Gypsum Fibrosum powder 20-30 part, calcium stearate 6-10 part, nano-titanium
Acid aluminum fiber 3.6-7.8 part, pitchstone ore in sand form powder 12-25 part, meerschaum 4-6 part, polyvinyl alcohol 6-10 part, hydroxypropyl cellulose
Ether 3.6-5.2 part, retardation water reducing agent 1.8-3.8 part, potassium sulfate 1.2-3.8 part, ammonium sulfate 0.8-2.4 part.
3. according to the preparation technology of a kind of anti-crack concrete according to any one of claim 1 or 2, it is characterised in that: described
Pitchstone ore in sand form powder is S105 level pitchstone ore in sand form powder.
The preparation technology of a kind of anti-crack concrete the most according to claim 3, it is characterised in that: described retardation water reducing agent
Mass parts composition is as follows: polycarboxylate superplasticizer mother liquor 40-45 part, guarantor are collapsed agent 6-10 part, Borax 2.5-3.5 part, plasticity-maintaining agent 4-6
Part, water 35-40 part.
The preparation technology of a kind of anti-crack concrete the most according to claim 4, it is characterised in that: described polycarboxylate water-reducer
The solid content of mother solution is 38%；The collapse solid content of agent of described guarantor is 35%.
The preparation technology of a kind of anti-crack concrete the most according to claim 3, it is characterised in that: described Gypsum Fibrosum powder is selected de-
Sulfur Gypsum Fibrosum powder and the mixture of dephosphorization Gypsum Fibrosum powder, its mass ratio is 1:1.5, and fineness is 250 mesh.
The preparation technology of a kind of anti-crack concrete the most according to claim 3, it is characterised in that: described calcium stearate is by chlorine
Change the mixture reaction of calcium and stearic acid and Palmic acid sodium salt to generate to wash with water and remove sodium chloride and obtain.
The preparation technology of a kind of anti-crack concrete the most according to claim 3, it is characterised in that its mass parts forms such as
Under: vitriol acid iron cement 4 parts, calcining coal gangue 10 parts, Gypsum Fibrosum powder 25 parts, calcium stearate 7.2 parts, nano barium titanate aluminum fiber 4.8 parts, pine
12.8 parts of fat rock ore in sand form powder, meerschaum 4.8 parts, polyvinyl alcohol 6.8 parts, hydroxypropylcelluloether ether 4.2 parts, retardation water reducing agent 2.4
Part.
The preparation technology of a kind of anti-crack concrete the most according to claim 1, it is characterised in that the matter of this anti-crack concrete
Amount part composition is as follows: cement 160 parts, 100 parts of fine aggregate stone, 160 parts of coarse aggregate stone, rubber grain 40 parts, flyash 65
Part, SILICA FUME 16 parts, polyamine epichlorohydrin resin 12 parts, extender 10 parts, 250 parts of water.
The preparation technology of a kind of anti-crack concrete the most according to claim 1, it is characterised in that: high in described step (3)
A diameter of 0.6-2mm of fiber in strong imitative steel fibre net.
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| CN107586055A (en) * | 2017-10-18 | 2018-01-16 | 唐宏泉 | A kind of concrete collapse-proof agent and its preparation technology |
| CN108083713A (en) * | 2017-12-25 | 2018-05-29 | 林厚开 | A kind of method prepared by build concrete |
| CN108117320A (en) * | 2017-12-25 | 2018-06-05 | 林厚开 | A kind of preparation method for building construction concrete |
| CN111233417A (en) * | 2020-02-29 | 2020-06-05 | 北京古运混凝土有限公司 | Preparation process of high-strength concrete |
| CN114702270A (en) * | 2022-04-19 | 2022-07-05 | 石家庄金隅混凝土有限公司 | Method for preparing concrete by using concrete wastewater |
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| CN111233417A (en) * | 2020-02-29 | 2020-06-05 | 北京古运混凝土有限公司 | Preparation process of high-strength concrete |
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