CN109354432A - A kind of early-strength water-reducing agent and preparation method and application - Google Patents
A kind of early-strength water-reducing agent and preparation method and application Download PDFInfo
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- CN109354432A CN109354432A CN201811346135.8A CN201811346135A CN109354432A CN 109354432 A CN109354432 A CN 109354432A CN 201811346135 A CN201811346135 A CN 201811346135A CN 109354432 A CN109354432 A CN 109354432A
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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
- 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
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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
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
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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
- 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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Abstract
The present invention discloses a kind of early-strength water-reducing agent and preparation method and application, surfactant is added separately among siliceous material solution and calcareous material solution first, the siliceous material solution containing surfactant and the calcareous material solution containing surfactant are subjected to hybrid reaction under room temperature, resulting hydrated calcium silicate gel mixed liquor A control pressure is that 0.2-0.5MPa carries out first filters pressing, obtained hydrated calcium silicate gel A is added dedicated solvent and mixes, obtained hydrated calcium silicate gel mixed liquid B control pressure is that 0.2-0.5MPa carries out secondary filters pressing, obtained hydrated calcium silicate gel B is added to the water mixing, stabilizing agent specially used mixing is added in obtained hydrated calcium silicate gel mixed liquor C, the High-efficiency polycarboxylic acid that 3-6% is added in obtained hydrated calcium silicate gel mixed liquor D subtracts Aqua mixes up to early-strength water-reducing agent, and the preparation for concrete can meet simultaneously can be with the improvement of mechanical property to concrete flowability.
Description
Technical field
The present invention relates to a kind of early-strength water-reducing agents and its preparation method and application, belong to concrete admixture technology neck
Domain.
Background technique
Concrete early-strength water-reducing agent has the working performance, mechanical property, endurance quality of concrete vital
It influences, however existing market product is irregular due to technical level, seriously constrains market application.
In general, there are the problem of be mainly shown as following several respects:
(1) product preparation method (especially stably dispersing measure) is not perfect, causes product stability poor, uniformity is not
Foot, long term storage are also easy to produce layering；
(2) product is unobvious to early strength of concrete promotion or bad to mobility improvement, it is difficult to meet convection current
The requirement that dynamic performance and mechanical property improve simultaneously.
Summary of the invention
A kind of early-strength water-reducing agent is provided the purpose of the present invention is to solve above-mentioned technical problem, which subtracts
Evenly dispersed and stabilization of the hydrated calcium silicate gel in early-strength water-reducing agent product system can be not only effectively ensured in aqua, fill
Its early strength function is waved in distribution, improves the mechanical property of concrete, and can farthest play high-efficiency polycarboxylic acid water reducer
Water-reduction in early-strength water-reducing agent system, improves the mobile performance of concrete.
Technical solution of the present invention
A kind of early-strength water-reducing agent, is prepared by a method comprising the following steps:
(1), by two equal part of surfactant, it is molten to be added separately to the siliceous material that mass percent concentration is 10-150%
Liquid and mass percent concentration are to stir evenly respectively among the calcareous material solution of 10-120%, and obtaining concentration is 25-40g/
The siliceous material solution containing surfactant of L and the calcareous material containing surfactant that concentration is 25-40g/L are molten
Liquid；
The surfactant is sodium lignin sulfonate or calcium lignosulfonate；
The siliceous material solution, calculates, i.e. sodium metasilicate in mass ratio: water 10-150:100, preferably 88-
The sodium silicate aqueous solution that the ratio of 150:100 mixes；
The calcareous material solution, calculates, i.e. calcium nitrate in mass ratio: water 10-120:100, preferably 108-
The calcium silicates aqueous solution that the ratio of 120:100 mixes；
(2), it under room temperature, calculates by volume, i.e. the siliceous material solution containing surfactant: containing surfactant
Calcareous material solution be 1:0.67-1.25, the preferably ratio of 1:1-1.25 contains surface-active for step (1) is resulting
The siliceous material solution of agent carries out hybrid reaction 3-5min, resulting reaction solution with the calcareous material solution containing surfactant
For hydrated calcium silicate gel mixed liquor A；
(3), the resulting hydrated calcium silicate gel mixed liquor A of step (2) is placed in filter press, starts filter press, control pressure
Power is that 0.2-0.5MPa carries out first filters pressing, to no longer occur until solution filters out in hydrated calcium silicate gel mixed liquor A, record
Resulting filtrate quality m after first filters pressing1, resulting filter cake, that is, hydrated calcium silicate gel A after first filters pressing；
(4), weighing quality is m1Dedicated solvent, the resulting hydrated calcium silicate gel A of step (3) is added thereto, control
Revolving speed processed is that 600-800r/min is stirred mixing, obtains hydrated calcium silicate gel mixed liquid B；
The dedicated solvent is that mass percent concentration is 2-5%, preferably the calcium hydroxide aqueous solution of 4-5%；
(5), hydrated calcium silicate gel mixed liquid B is placed in filter press, starts filter press, control pressure is 0.2-
0.5MPa carries out secondary filters pressing, records secondary filters pressing until solution filters out to no longer occur in hydrated calcium silicate gel mixed liquid B
Resulting filtrate quality m afterwards2, resulting filter cake is hydrated calcium silicate gel B after secondary filters pressing；
(6), weighing quality is m2Water, the resulting hydrated calcium silicate gel B of step (5) is added thereto, control revolving speed
It is stirred mixing for 600-800r/min, obtains hydrated calcium silicate gel mixed liquor C；
(7), by stabilizing agent specially used: hydrated calcium silicate gel mixed liquor C is 1g:30-100L, the ratio of preferably 1g:100L
Example, is added to stabilizing agent specially used in the resulting hydrated calcium silicate gel mixed liquor C of step (6), and control revolving speed is 600-
800r/min is stirred mixing, obtains hydrated calcium silicate gel mixed liquor D；
It is described it is stabilizing agent specially used be that converted starch aqueous solution that mass percent concentration is 1-2% or mass percent are dense
Degree is the xanthan gum solution of 2-3%, xanthan gum is added in cold water, with 800- by the xanthan gum solution
It is obtained after 1000r/min stirring 5-6min；Deformation starch is added to the water, is warming up to by the converted starch aqueous solution
It is to obtain after 300-500r/min stirs 2-3min that revolving speed is controlled after 80-90 DEG C；
(8), calculate in mass ratio, high-efficiency polycarboxylic acid water reducer: hydrated calcium silicate gel mixed liquor D is 3-6:100, preferably
For the ratio of 3-4.5:100, high-efficiency polycarboxylic acid water reducer is added in hydrated calcium silicate gel mixed liquor D, then control turns
Speed is that 500-800r/min is stirred mixing to get a kind of early-strength water-reducing agent.
Above-mentioned resulting early-strength water-reducing agent is used for the preparation of concrete, can be obviously improved the early stage of resulting concrete
Intensity, and mobility and its gradual loss have also obtained apparent improvement, in a specific embodiment of the invention only with C20 or
It is illustrated for the preparation of the concrete such as C50, but is not intended to limit it on other such as preparation of C10, C30 concrete
Application.
Advantageous effects of the invention
A kind of early-strength water-reducing agent of the invention, due to being mixed with lignin in calcium/siliceous material solution in preparation process
Sodium sulfonate or calcium lignosulfonate surfactant, to greatly promote after filters pressing, hydrated calcium silicate gel block is dissolved to be divided again
Efficiency is dissipated, so that the stability at later stage enhancing of final resulting early-strength water-reducing agent.
Further, a kind of early-strength water-reducing agent of the invention, due to using xanthan gum or converted starch to make in preparation process
To be stabilizing agent specially used, so that effective guarantee hydrated calcium silicate gel is evenly dispersed in system, therefore resulting early-strength subtracts
The system of aqua is more stable.
Further, a kind of early-strength water-reducing agent of the invention, due to stabilizing agent specially used prior to efficient poly- carboxylic in preparation process
The addition of sour water-reducing agent, and the additional amount of high-efficiency polycarboxylic acid water reducer controls in the range of 3-6%, so as to be greatly decreased
The adsorbance that high-efficiency polycarboxylic acid water reducer shows in hydrated calcium silicate gel gives full play to high-efficiency polycarboxylic acid water reducer in the present invention
Early-strength water-reducing agent system in water-reduction, thus make its be applied to concrete preparation when, concrete can be substantially improved
Mobile performance.
Further, a kind of early-strength water-reducing agent of the invention, intermediate product aquation when due to preparation process by obtaining
High-efficiency polycarboxylic acid water reducer is added in gel of calcium silicate, so that final resulting early-strength water-reducing agent can when preparing for concrete
The early strength of concrete is substantially improved, and has no adverse effect to its later strength, meets the mechanical property requirements of concrete.
In conclusion a kind of early-strength water-reducing agent of the invention can meet mobile performance and mechanical property to concrete simultaneously
The requirement that can improve.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, lead to below
Crossing specific embodiment, the present invention will be described in detail, but is not intended to limit the present invention.
The model of filter press 1,2 used in various embodiments of the present invention is XMSJ5/500, and Hangzhou Xin Yuan filter press has
The production of limit company.
The information of the specification and manufacturer of various raw materials or reagent used in various embodiments of the present invention is as follows:
The preparation method of C20 concrete, C50 concrete in each Application Example of the invention, according to JGJ55-2011
(design of common concrete proportioning regulation) carries out.
Early-strength water-reducing agent applies the measuring method of the technical indicator of rear resulting concrete in various embodiments of the present invention
It is as follows:
The compression strength (MPa) of 3d, 7d and 28d are measured according to GB/T 17671-1999 method；
Control Measures for Concrete Slump divergence (mm), slump flow test 1h gradual loss (mm) are according to GB/T 50080-2002 method
It is measured.
Embodiment1
A kind of early-strength water-reducing agent, is prepared by a method comprising the following steps:
(1), by two equal part of 4g surfactant, it is added separately to the siliceous material that 100ml mass percent concentration is 88%
Among expecting solution and 100ml mass percent concentration for 108% calcareous material solution, it is uniformly mixing to obtain 40g/L's respectively
The calcareous material solution containing surfactant of siliceous material solution and 40g/L containing surfactant；
The surfactant is sodium lignin sulfonate；
The siliceous material solution, calculates, i.e. sodium metasilicate in mass ratio: water is what the ratio of 88:100 mixed
The sodium silicate aqueous solution that mass percent concentration is 88%；
The calcareous material solution, calculates, i.e. calcium nitrate in mass ratio: water is what the ratio of 108:100 mixed
The calcium silicates aqueous solution that mass percent concentration is 108%；
(2), it under room temperature, calculates by volume, i.e. the siliceous material solution containing surfactant of 40g/L: 40g/L's
Calcareous material solution containing surfactant is the ratio of 1:1, by the resulting siliceous material containing surfactant of step (1)
Expect that solution carries out hybrid reaction 3min with the calcareous material solution containing surfactant, resulting reaction solution is hydrated calcium silicate
Gel mixed liquor A；
(3), the resulting hydrated calcium silicate gel mixed liquor A of step (2) is placed in filter press 1, starts filter press 1, control
Pressure is that how many 0.2MPa carry out first filters pressing, to no longer occur until solution filters out in hydrated calcium silicate gel mixed liquor A,
Record resulting filtrate quality m after first filters pressing1, resulting filter cake, that is, hydrated calcium silicate gel A after first filters pressing；
(4), weighing quality is m1Dedicated solvent, the resulting hydrated calcium silicate gel A of step (3) is added thereto, control
Revolving speed processed is that 600r/min is stirred mixing, obtains hydrated calcium silicate gel mixed liquid B；
The dedicated solvent is the calcium hydroxide aqueous solution that mass percent concentration is 4%；
(5), hydrated calcium silicate gel mixed liquid B is placed in filter press 2, starts filter press 2, control pressure is how many
0.2MPa carries out secondary filters pressing, records secondary filters pressing until solution filters out to no longer occur in hydrated calcium silicate gel mixed liquid B
Resulting filtrate quality m afterwards2, resulting filter cake is hydrated calcium silicate gel B after secondary filters pressing；
(6), weighing quality is m2Water, the resulting hydrated calcium silicate gel B of step (5) is added thereto, control revolving speed
It is stirred mixing for 600r/min, obtains hydrated calcium silicate gel mixed liquor C；
(7), in stabilizing agent specially used: hydrated calcium silicate gel mixed liquor C is the ratio of 1g:100L, is added stabilizing agent specially used
Enter into the resulting hydrated calcium silicate gel mixed liquor C of step (6), control revolving speed is that 600r/min is stirred mixing, is obtained
Hydrated calcium silicate gel mixed liquor D；
It is described it is stabilizing agent specially used be converted starch aqueous solution that mass percent concentration is 2%, the converted starch
Deformation starch, i.e., be added to the water by aqueous solution, and it is that 300-500r/min stirs 2-3min that revolving speed is controlled after being warming up to 80-90 DEG C
After obtain；
(8), calculate in mass ratio, high-efficiency polycarboxylic acid water reducer: hydrated calcium silicate gel mixed liquor D is 3:100 ratio, will
High-efficiency polycarboxylic acid water reducer is added in hydrated calcium silicate gel mixed liquor D, is then controlled revolving speed and is stirred for 600r/min
It mixes to get a kind of early-strength water-reducing agent；
Application Example 1
The resulting early-strength water-reducing agent of embodiment 1 is used for the preparation of C20 concrete, based on one cube of C20 concrete of preparation
It calculates, each material quantity used and composition are as follows:
Using comparative examples 1
" the resulting early-strength water-reducing agent of embodiment 1 " in above-mentioned Application Example 1 is replaced in the prior art
" common early-strength water-reducing agent " is calculated, each raw material used for the preparation of C20 concrete by one cube of C20 concrete of preparation
Amount and composition are as follows:
The C20 concrete containing the resulting early-strength water-reducing agent of embodiment 1 resulting to above-mentioned Application Example 1 and application
The compression strength (MPa) of 3d, 7d and 28d of the resulting C20 concrete containing common early-strength water-reducing agent of comparative examples 1,
Slump flow test (mm), slump flow test 1h gradual loss (mm) are measured respectively, and resulting result see the table below:
As can be seen from the above table compared with application comparative examples 1, embodiment 1 is contained obtained in Application Example 1
C20 concrete 3d, 7d compression strength of early-strength water-reducing agent be respectively 15.7MPa, 21.5MPa, promoted it is obvious and
It has no adverse effect to the compression strength of 28d, still may remain in 31.8MPa, while slump flow test becomes larger, reach 510mm；
Slump flow test 1h gradual loss becomes smaller, only 130mm, has been indicated above obtained in Application Example 1 containing embodiment 1
The C20 early strength of concrete of early-strength water-reducing agent is improved, and mobility and its gradual loss are obviously improved.
Application Example 2
The resulting early-strength water-reducing agent of embodiment 1 is used for the preparation of C50 concrete, is to prepare one cube of C50 concrete
Example, each material quantity used and composition are as follows:
Using comparative examples 2
" the resulting early-strength water-reducing agent of embodiment 1 " in Application Example 2 is replaced in the prior art " common early
Strong type type water-reducing agent " is calculated, various material quantities used for the preparation of C50 concrete by one cube of C50 concrete of preparation
And composition is as follows:
Contain the resulting early-strength water-reducing agent of embodiment 1 to above-mentioned Application Example 2 and using comparative examples 2 are resulting
C50 concrete and C50 concrete 3d, 7d and 28d containing common early-strength water-reducing agent in the prior art compression strength
(MPa), slump flow test (mm), slump flow test 1h gradual loss (mm) are measured, and resulting result see the table below:
As can be seen from the above table compared with application comparative examples 2, embodiment 1 is contained obtained in Application Example 2
C50 concrete 3d, 7d compression strength of early-strength water-reducing agent be respectively 33.7MPa, 41.6MPa, promoted it is obvious and
It has no adverse effect to the compression strength of 28d, still may remain in 58.1MPa, while slump flow test becomes larger, reach 610mm；
Slump flow test 1h gradual loss becomes smaller, only 10mm, has been indicated above in Application Example 2 and has subtracted containing 1 early-strength of embodiment
The C50 early strength of concrete of aqua is improved, and mobility and its gradual loss are obviously improved.
Embodiment 2
A kind of early-strength water-reducing agent, is prepared by a method comprising the following steps:
(1), by two equal part of 3g surfactant, be added separately to 120ml mass percent concentration be 150% it is siliceous
Among the calcareous material solution that the mass percent concentration of material solution and 120ml are 120%, it is uniformly mixing to obtain 25g/ respectively
The siliceous material solution containing surfactant of L and the calcareous material solution containing surfactant of 25g/L；
The surfactant is sodium lignin sulfonate；
The siliceous material solution, calculates, i.e. sodium metasilicate in mass ratio: water is what the ratio of 150:100 mixed
The sodium silicate aqueous solution that mass percent concentration is 150%；
The calcareous material solution, calculates, i.e. calcium nitrate in mass ratio: water is what the ratio of 120:100 mixed
The calcium silicates aqueous solution that mass percent concentration is 120%；
(2), it under room temperature, calculates by volume, i.e. the siliceous material solution containing surfactant of 25g/L: 25g/L
The calcareous material solution containing surfactant be 1:1.25 ratio, step (1) is resulting containing surfactant
Siliceous material solution carries out hybrid reaction 5min with the calcareous material solution containing surfactant, and resulting reaction solution is aquation
Gel of calcium silicate mixed liquor A；
(3), the resulting hydrated calcium silicate gel mixed liquor A of step (2) is placed in filter press, starts filter press, control pressure
Power is that how many 0.5MPa carry out first filters pressing, to no longer occur until solution filters out in hydrated calcium silicate gel mixed liquor A, record
Resulting filtrate quality m after first filters pressing1, resulting filter cake, that is, hydrated calcium silicate gel A after first filters pressing；
(4), weighing quality is m1Dedicated solvent, the resulting hydrated calcium silicate gel A of step (3) is added thereto, control
Revolving speed processed is that 800r/min is stirred mixing, obtains hydrated calcium silicate gel mixed liquid B；
The dedicated solvent is the calcium hydroxide aqueous solution that mass percent concentration is 5%；
(5), hydrated calcium silicate gel mixed liquid B is placed in filter press, starts filter press, control pressure is how many
0.5MPa carries out secondary filters pressing, records secondary filters pressing until solution filters out to no longer occur in hydrated calcium silicate gel mixed liquid B
Resulting filtrate quality m afterwards2, resulting filter cake is hydrated calcium silicate gel B after secondary filters pressing；
(6), weighing quality is m2Water, the resulting hydrated calcium silicate gel B of step (5) is added thereto, control revolving speed
It is stirred mixing for 800r/min, obtains hydrated calcium silicate gel mixed liquor C；
(7), in stabilizing agent specially used: hydrated calcium silicate gel mixed liquor C is the ratio of 1g:100L, is added stabilizing agent specially used
Enter into the resulting hydrated calcium silicate gel mixed liquor C of step (6), control revolving speed is that 800r/min is stirred mixing, is obtained
Hydrated calcium silicate gel mixed liquor D；
It is described it is stabilizing agent specially used be converted starch aqueous solution that mass percent concentration is 2%, the converted starch
Deformation starch, i.e., be added to the water by aqueous solution, and it is that 300-500r/min stirs 2-3min that revolving speed is controlled after being warming up to 80-90 DEG C
After obtain；
(8), calculate in mass ratio, high-efficiency polycarboxylic acid water reducer: hydrated calcium silicate gel mixed liquor D is 4.5:100 ratio
Example, high-efficiency polycarboxylic acid water reducer is added in hydrated calcium silicate gel mixed liquor D, controls revolving speed then as 800r/min progress
It stirs and evenly mixs to get a kind of early-strength water-reducing agent.
In conclusion early-strength type water-reducing agent, when preparation for concrete such as C20 or C50, can obviously mention
The early strength of resulting concrete is risen, and is had no adverse effect to its later strength, and mobility and its gradual loss also obtain
Apparent improvement.A kind of early-strength water-reducing agent i.e. of the invention can meet mobile performance and mechanical property to concrete simultaneously
Improved requirement.
The above content is only basic explanation and preferred embodiment of the invention, and is appointed made by technical solution according to the present invention
What equivalent transformation, is within the scope of protection of the invention.
Claims (8)
1. a kind of preparation method of early-strength water-reducing agent, which comprises the following steps:
(1), by two equal part of surfactant, be added separately to siliceous material solution that mass percent concentration is 10-150% with
Mass percent concentration is to stir evenly respectively among the calcareous material solution of 10-120%, and obtaining concentration is 25-40g/L's
The calcareous material solution containing surfactant that siliceous material solution containing surfactant and concentration are 25-40g/L；
The surfactant is sodium lignin sulfonate or calcium lignosulfonate；
The siliceous material solution, calculates, i.e. sodium metasilicate in mass ratio: water is the silicon that the ratio of 10-150:100 mixes
Acid sodium aqueous solution；
The calcareous material solution, calculates, i.e. calcium nitrate in mass ratio: water is the silicon that the ratio of 10-120:100 mixes
Sour calcium aqueous solution；
(2), it under room temperature, calculates by volume, i.e. the siliceous material solution containing surfactant: the calcium containing surfactant
Material solution be 1:0.67-1.25 ratio, by the resulting siliceous material solution containing surfactant of step (1) with contain
There is the calcareous material solution of surfactant to carry out hybrid reaction 3-5min, resulting reaction solution is hydrated calcium silicate gel mixing
Liquid A；
(3), the resulting hydrated calcium silicate gel mixed liquor A of step (2) is placed in filter press, starts filter press, control pressure is
0.2-0.5MPa carries out first filters pressing, and to no longer occur until solution filters out in hydrated calcium silicate gel mixed liquor A, record is first
Resulting filtrate quality m after filters pressing1, resulting filter cake, that is, hydrated calcium silicate gel A after first filters pressing；
(4), weighing quality is m1Dedicated solvent, the resulting hydrated calcium silicate gel A of step (3) is added thereto, control revolving speed
It is stirred mixing for 600-800r/min, obtains hydrated calcium silicate gel mixed liquid B；
The dedicated solvent is the calcium hydroxide aqueous solution that mass percent concentration is 2-5%；
(5), hydrated calcium silicate gel mixed liquid B is placed in filter press, starts filter press, control pressure as 0.2-0.5MPa progress
Secondary filters pressing records resulting filter after secondary filters pressing until solution filters out to no longer occur in hydrated calcium silicate gel mixed liquid B
Liquid quality m2, resulting filter cake is hydrated calcium silicate gel B after secondary filters pressing；
(6), weighing quality is m2Water, the resulting hydrated calcium silicate gel B of step (5) is added thereto, control revolving speed be 600-
800r/min is stirred mixing, obtains hydrated calcium silicate gel mixed liquor C；
(7), in stabilizing agent specially used: hydrated calcium silicate gel mixed liquor C is the ratio of 1g:30-100L, by stabilizing agent specially used addition
Into the resulting hydrated calcium silicate gel mixed liquor C of step (6), control revolving speed is that 600-800r/min is stirred mixing, is obtained
To hydrated calcium silicate gel mixed liquor D；
It is described it is stabilizing agent specially used be converted starch aqueous solution that mass percent concentration is 1-2% or mass percent concentration is
The xanthan gum solution of 2-3%；Xanthan gum, i.e., be added in cold water by the xanthan gum solution, with 800-1000r/min
It is obtained after stirring 5-6min；Deformation starch is added to the water, after being warming up to 80-90 DEG C by the converted starch aqueous solution
Control revolving speed is to obtain after 300-500r/min stirs 2-3min；
(8), calculate in mass ratio, high-efficiency polycarboxylic acid water reducer: hydrated calcium silicate gel mixed liquor D is the ratio of 3-6:100, will
High-efficiency polycarboxylic acid water reducer is added in hydrated calcium silicate gel mixed liquor D, controls revolving speed then as 600-800r/min progress
It stirs and evenly mixs to get a kind of early-strength water-reducing agent.
2. the preparation method of early-strength water-reducing agent as described in claim 1, it is characterised in that:
In step (1): the siliceous material solution calculates, i.e. sodium metasilicate in mass ratio: the ratio that water is 88-150:100 is mixed
Sodium silicate aqueous solution made of conjunction；
The calcareous material solution, calculates, i.e. calcium nitrate in mass ratio: water is what the ratio of 108-120:100 mixed
Calcium silicates aqueous solution；
In step (2): under room temperature, calculating by volume, i.e. the siliceous material solution containing surfactant: containing surface-active
The calcareous material solution of agent is 1:1-1.25；
In step (4): the dedicated solvent is the calcium hydroxide aqueous solution that mass percent concentration is 4-5%；
In step (7): stabilizing agent specially used dosage, by stabilizing agent specially used: hydrated calcium silicate gel mixed liquor C is 1g:100L's
Ratio calculates；
In step (8): calculate in mass ratio, high-efficiency polycarboxylic acid water reducer: hydrated calcium silicate gel mixed liquor D is 3-4.5:100
Ratio.
3. the preparation method of early-strength water-reducing agent as claimed in claim 2, it is characterised in that:
In step (1): the matter of the siliceous material solution containing surfactant and the calcareous material solution containing surfactant
Measuring percent concentration is 25g/L
The siliceous material solution, calculates, i.e. sodium metasilicate in mass ratio: water is the silicic acid that the ratio of 150:100 mixes
Sodium water solution；
The calcareous material solution, calculates, i.e. calcium nitrate in mass ratio: the calcium silicates that the ratio of water 120:100 mixes
Aqueous solution；
In step (2): under room temperature, calculating by volume, i.e. the siliceous material solution containing surfactant: containing surface-active
The calcareous material solution of agent is 1:1.25；
In step (3): control pressure is that 0.5MPa carries out first filters pressing；
In step (5): control pressure is that 0.5MPa carries out secondary filters pressing；
In step (8): calculate in mass ratio, high-efficiency polycarboxylic acid water reducer: hydrated calcium silicate gel mixed liquor D is 4.5:100's
Ratio.
4. the preparation method of early-strength water-reducing agent as claimed in claim 3, it is characterised in that:
In step (1): the matter of the siliceous material solution containing surfactant and the calcareous material solution containing surfactant
Measuring percent concentration is 40g/L；
The siliceous material solution, calculates, i.e. sodium metasilicate in mass ratio: water is the sodium metasilicate that the ratio of 88:100 mixes
Aqueous solution；
The calcareous material solution, calculates, i.e. calcium nitrate in mass ratio: the calcium silicates that the ratio of water 108:100 mixes
Aqueous solution；
In step (2): under room temperature, calculating by volume, i.e. the siliceous material solution containing surfactant: containing surface-active
The calcareous material solution of agent is 1:1；
In step (3): control pressure is that 0.2MPa carries out first filters pressing；
In step (5): control pressure is that 0.2MPa carries out secondary filters pressing；
In step (8): calculate in mass ratio, high-efficiency polycarboxylic acid water reducer: hydrated calcium silicate gel mixed liquor D is the ratio of 3:100
Example.
5. the preparation method of the early-strength water-reducing agent as described in claim 2,3 or 4, it is characterised in that:
In step (7): it is described it is stabilizing agent specially used be converted starch aqueous solution that mass percent concentration is 2%.
6. a kind of early-strength water-reducing agent that the preparation method as described in claim 1,2,3 or 4 obtains.
7. the preparation that a kind of early-strength water-reducing agent as claimed in claim 6 is used for C20 concrete, it is characterised in that: by preparation
One cube of C20 concrete calculates, and each material quantity used and composition are as follows:
3d, 7d compression strength of the resulting C20 concrete containing early-strength water-reducing agent are respectively 15.7MPa, 21.5MPa, 28d
Compression strength be 31.8MPa, slump flow test 510mm, slump flow test 1h gradual loss be 130mm.
8. the preparation that a kind of early-strength water-reducing agent as claimed in claim 6 is used for C50 concrete, it is characterised in that: by preparation
One cube of C50 concrete calculates, and various material quantities used and composition are as follows:
3d, 7d compression strength of the resulting C50 concrete containing early-strength water-reducing agent are respectively 33.7MPa, 41.6MPa, 28d
Compression strength be 58.1MPa, slump flow test 610mm, slump flow test 1h gradual loss be 10mm.
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