CN110423035A - A kind of powder hydrated calcium silicate early strength agent and preparation method thereof - Google Patents
A kind of powder hydrated calcium silicate early strength agent and preparation method thereof Download PDFInfo
- Publication number
- CN110423035A CN110423035A CN201910793592.XA CN201910793592A CN110423035A CN 110423035 A CN110423035 A CN 110423035A CN 201910793592 A CN201910793592 A CN 201910793592A CN 110423035 A CN110423035 A CN 110423035A
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- CN
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- Prior art keywords
- calcium silicate
- early strength
- strength agent
- hydrated
- siliceous material
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Classifications
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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
- C04B40/0042—Powdery 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/12—Set accelerators
Abstract
The invention discloses a kind of powder hydrated calcium silicate early strength agent and preparation method thereof, it is made of the following components: the siliceous material mixture of retarder, semi-hydrated gypsum, calcium, flyash thin pulp, the siliceous material mixture of calcium is mixed by calcareous material and siliceous material, calcareous material is the mixture of calcium nitrate and calcium formate, and the molar ratio of calcareous material and siliceous material is 0.5~2:1；Siliceous material is non-hydrate sodium metasilicate or SODIUM METASILICATE PENTAHYDRATE；Flyash thin pulp mass concentration is 3%~20%；Retarder is citric acid or sodium citrate, the present invention can not only shorten the generated time of aqua hydrated calcium silicate, and the reaction condition in synthesis process can be substantially reduced, the disadvantages of avoiding the sedimentation of hydrated calcium silicate suspension, being easily carbonized, the processes such as washing, suction filtration, vacuum drying treatment of replacement are solidified with semi-hydrated gypsum simultaneously, keep hydrated calcium silicate gel early strength agent easy to industrialized production.
Description
Technical field
The present invention relates to concrete research and development technology field, specifically a kind of powder hydrated calcium silicate early strength agent and its preparation side
Method.
Background technique
Hydrated calcium silicate early strength agent is a kind of very effective concrete early strength agent, and hydrated calcium silicate early strength agent is main at present
There are aqua and two kinds of powder, wherein aqua is a kind of suspension of hydrated calcium silicate, is had the following problems: first is that effective component
It is few, cause using when volume it is big；Second is that placing for a long time easily settled, and the exposure rotten equistability that is easily carbonized in air is poor.And
Hydration calcium silicate powder early strength agent, conventional method be by being washed, being filtered to the aqua hydrated calcium silicate of synthesis, vacuum it is dry
Dry processing, and powder hydrated calcium silicate is obtained, but have the following problems in this course: first is that hydrated calcium silicate is through high temperature
When dry, the structure of hydrated calcium silicate can be damaged due to temperature is excessively high；Second is that hydrated calcium silicate is dry through low-temperature negative-pressure
Constantly, drying efficiency is low, complex procedures, at high cost, is unfavorable for the popularization and application of hydrated calcium silicate.
Summary of the invention
The purpose of the present invention is to provide a kind of powder hydrated calcium silicate early strength agent and preparation method thereof, to solve above-mentioned back
The problem of being proposed in scape technology.
To achieve the above object, the invention provides the following technical scheme:
A kind of powder hydrated calcium silicate early strength agent, is made of the following components: the siliceous material mixing of retarder, semi-hydrated gypsum, calcium
Material, flyash thin pulp, the siliceous material mixture of calcium are mixed by calcareous material and siliceous material.
As a further solution of the present invention: calcareous material is the mixture of calcium nitrate and calcium formate, calcareous material and silicon
The molar ratio of material is 0.5~2:1；
Siliceous material is non-hydrate sodium metasilicate or SODIUM METASILICATE PENTAHYDRATE；
Flyash thin pulp mass concentration is 3%~20%；
Retarder is citric acid or sodium citrate；
The weight and calcareous material of flyash thin pulp and the total mass ratio of siliceous material are 10:1~25:1, slurries A and half
The mass ratio of water gypsum is 0.5~5:1, and the mass fraction that retarder accounts for semi-hydrated gypsum is between 0.01%~0.05%.
A kind of preparation method of powder hydrated calcium silicate early strength agent, comprising the following steps:
Step 1: be respectively configured concentration be certain density calcareous material solution, siliceous material solution, it is spare；
Step 2: and then obtain in step 1 two kinds of solution are added drop-wise in the flyash thin pulp of PH=10-16, and holds
Continuous 1~3h of high-speed stirred, prepares the hydrated calcium silicate slurries A for being adsorbed on fine coal gray surface；
Step 3: 2-4min is mixed in the ratio of 1:1:0.02 in slurries A, semi-hydrated gypsum, retarder three, is existed side by side
It carves and carries out curing molding processing, solid material B is made；
Step 4: the solid material B that step 3 is obtained is ground, and obtains powder early strength agent.
As a further solution of the present invention: calcareous material solution, siliceous material solution concentration in step 1 are 10%-
20%.
As a further solution of the present invention: flyash thin pulp pH value sodium hydroxide solution or waterglass are molten in step 2
Liquid is adjusted.
As a further solution of the present invention: the PH=13 of the flyash thin pulp in step 2.
Compared with prior art, the beneficial effects of the present invention are: the present invention can not only shorten aqua hydrated calcium silicate
Generated time, and can substantially reduce the reaction condition in synthesis process avoids the sedimentation, easily of hydrated calcium silicate suspension
The disadvantages of carbonization, while the processes such as washing, suction filtration, vacuum drying treatment of replacement are solidified with semi-hydrated gypsum, keep hydrated calcium silicate solidifying
Glue early strength agent is easy to industrialized production.
Specific embodiment
Below in conjunction in the embodiment of the present invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Embodiment 1
In the embodiment of the present invention, a kind of powder hydrated calcium silicate early strength agent is made of the following components: retarder, half water stone
The siliceous material mixture of cream, calcium, flyash thin pulp, the siliceous material mixture of calcium are mixed by calcareous material and siliceous material；
Calcareous material is the mixture of calcium nitrate and calcium formate, and wherein the molar ratio of calcareous material and siliceous material is 0.5；
Siliceous material is non-hydrate sodium metasilicate；
Flyash thin pulp mass concentration is 3%；
Retarder is citric acid；
The weight and calcareous material of flyash thin pulp and the total mass ratio of siliceous material are 10:1, slurries A and semi-hydrated gypsum
Mass ratio be 0.5, retarder account for semi-hydrated gypsum mass fraction be 0.01%.
A kind of preparation method of powder hydrated calcium silicate early strength agent, comprising the following steps:
Step 1: be respectively configured concentration be certain density calcareous material solution, siliceous material solution, it is spare；
Step 2: and then obtain in step 1 two kinds of solution are added drop-wise in the flyash thin pulp of PH=13, and continues
1~3h of high-speed stirred prepares the hydrated calcium silicate slurries A for being adsorbed on fine coal gray surface, flyash thin pulp pH value hydroxide
Sodium solution or water glass solution are adjusted；
Step 3: 4min is mixed in the ratio of 1:1:0.02 in slurries A, semi-hydrated gypsum, retarder three, and at once
Curing molding processing is carried out, solid material B is made；
Step 4: the solid material B that step 3 is obtained is ground, and obtains powder early strength agent.
Here siliceous material can replace SODIUM METASILICATE PENTAHYDRATE, and retarder could alternatively be sodium citrate, selection here
Actual use is influenced less, so being no longer described in detail.
Embodiment 2
A kind of powder hydrated calcium silicate early strength agent, is made of the following components: retarder；Semi-hydrated gypsum；The siliceous material mixing of calcium
Material；Flyash thin pulp, the siliceous material mixture of calcium are mixed by calcareous material and siliceous material；
Calcareous material is the mixture of calcium nitrate and calcium formate, and wherein the molar ratio of calcareous material and siliceous material is 2:1；
Siliceous material is non-hydrate sodium metasilicate；
Flyash thin pulp mass concentration is 20%；
Retarder is citric acid；
The weight and calcareous material of flyash thin pulp and the total mass ratio of siliceous material are 25:1, slurries A and semi-hydrated gypsum
Mass ratio be 5:1, retarder account for semi-hydrated gypsum mass fraction be 0.05%.
A kind of preparation method of powder hydrated calcium silicate early strength agent, comprising the following steps:
Step 1: be respectively configured concentration be certain density calcareous material solution, siliceous material solution, it is spare；
Step 2: and then obtain in step 1 two kinds of solution are added drop-wise in the flyash thin pulp of PH=13, and continues
1~3h of high-speed stirred prepares the hydrated calcium silicate slurries A for being adsorbed on fine coal gray surface, flyash thin pulp pH value hydroxide
Sodium solution or water glass solution are adjusted；
Step 3: 4min is mixed in the ratio of 1:1:0.02 in slurries A, semi-hydrated gypsum, retarder three, and at once
Curing molding processing is carried out, solid material B is made；
Step 4: the solid material B that step 3 is obtained is ground, and obtains powder early strength agent.
Embodiment 3
A kind of powder hydrated calcium silicate early strength agent, is made of the following components: the siliceous material mixing of retarder, semi-hydrated gypsum, calcium
Material, flyash thin pulp, the siliceous material mixture of calcium are mixed by calcareous material and siliceous material；
Calcareous material is the mixture of calcium nitrate and calcium formate, and wherein the molar ratio of calcareous material and siliceous material is 1:1；
Siliceous material is non-hydrate sodium metasilicate；
Flyash thin pulp mass concentration is 15%；
Retarder is citric acid；
The weight and calcareous material of flyash thin pulp and the total mass ratio of siliceous material are 18:1, slurries A and semi-hydrated gypsum
Mass ratio be 2:1, retarder account for semi-hydrated gypsum mass fraction be 0.03%.
A kind of preparation method of powder hydrated calcium silicate early strength agent, comprising the following steps:
Step 1: be respectively configured concentration be certain density calcareous material solution, siliceous material solution, it is spare；
Step 2: and then obtain in step 1 two kinds of solution are added drop-wise in the flyash thin pulp of PH=13, and continues
1~3h of high-speed stirred prepares the hydrated calcium silicate slurries A for being adsorbed on fine coal gray surface, flyash thin pulp pH value hydroxide
Sodium solution or water glass solution are adjusted；
Step 3: 4min is mixed in the ratio of 1:1:0.02 in slurries A, semi-hydrated gypsum, retarder three, and at once
Curing molding processing is carried out, solid material B is made；
Step 4: the solid material B that step 3 is obtained is ground, and obtains powder early strength agent.
Experimental comparison:
Comparison column 1 are existing concrete, and specific proportion is as follows:
II 52.5 ordinary portland cement of conch P.；S95 grades of miberal powders；II grade of flyash；Fineness modulus 2.6~2.8；River
Sand；5~31.5mm continuous grading rubble；Outstanding person's polycarboxylate water-reducer (solid content 20%) of section；Concrete mix unit:
Kg/m3
| Cement | Miberal powder | Flyash | Sand | Stone | Water | Water-reducing agent |
| 280 | 80 | 40 | 680 | 1280 | 120 | 4 |
Comparing column 2 is the early strength agent that existing concrete adds traditional technology production；
Wherein the volume of early strength agent is the 2.5% of cementitious material now, and equivalent replaces flyash；It is obtained by specific experiment
Obtain following data:
| Blank sample | Compare column 1 | Raising ratio % | Comparative example 2 | Raising ratio % | |
| 1d compression strength | 39.2 | 47.3 | 20.7% | 42.3 | 8.1% |
| 3d compression strength | 57.8 | 64.1 | 10.9% | 60.2 | 4.2% |
| 28 compression strength | 89.6 | 92.7 | 3.5% | 90.1 | 1.1% |
As seen from the table, after mixing the application early strength agent in concrete, early strong intensity has greatly improved, Er Qiehou
Phase intensity also increases 3.1MPa than blank.Thus, which, which not only passes through hydrated calcium silicate, realizes early strong effect, and
And passing through the activity of gypsum activation mineral admixture, later strength improves, it is also seen that traditional early strength agent is imitated
Early strength agent documented by the obvious bad and the application of fruit, during the preparation process can be maximum based on early strength agent documented by this application
Its activity of the guarantee of amplitude, and the manufacture outflow simplified, have significant progress.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (5)
1. a kind of powder hydrated calcium silicate early strength agent, which is characterized in that be made of the following components: retarder, semi-hydrated gypsum, calcium silicon
Material mixture, flyash thin pulp, the siliceous material mixture of calcium are mixed by calcareous material and siliceous material.
2. powder hydrated calcium silicate early strength agent according to claim 1, which is characterized in that calcareous material is calcium nitrate and first
The molar ratio of the mixture of sour calcium, calcareous material and siliceous material is 0.5~2:1；
Siliceous material is non-hydrate sodium metasilicate or SODIUM METASILICATE PENTAHYDRATE；
Flyash thin pulp mass concentration is 3%~20%；
Retarder is citric acid or sodium citrate；
The weight and calcareous material of flyash thin pulp and the total mass ratio of siliceous material are 10:1~25:1, slurries A and half water stone
The mass ratio of cream is 0.5~5:1, and the mass fraction that retarder accounts for semi-hydrated gypsum is 0.01%~0.05%.
3. a kind of preparation method of powder hydrated calcium silicate early strength agent, which comprises the following steps:
Step 1: be respectively configured concentration be certain density calcareous material solution, siliceous material solution, it is spare；
Step 2: and then obtain in step 1 two kinds of solution are added drop-wise in the flyash thin pulp of PH=13, and continue high speed
1~3h is stirred, the hydrated calcium silicate slurries A for being adsorbed on fine coal gray surface is prepared；
Step 3: by slurries A, semi-hydrated gypsum, retarder three in 1:1:0.02 ratio be mixed 2-4min, and at once into
The processing of row curing molding, is made solid material B；
Step 4: the solid material B that step 3 is obtained is ground, and obtains powder early strength agent.
4. the preparation method of powder hydrated calcium silicate early strength agent according to claim 3, which is characterized in that in step 1
Calcareous material solution, siliceous material solution concentration are 10%.
5. the preparation method of powder hydrated calcium silicate early strength agent according to claim 3, which is characterized in that powder in step 2
Coal ash thin pulp pH value sodium hydroxide solution or water glass solution are adjusted.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112430036A (en) * | 2020-11-30 | 2021-03-02 | 湖北工业大学 | In-situ preparation method of cementing material for offshore area infrastructure |
| CN115215627A (en) * | 2022-07-19 | 2022-10-21 | 湖南愿景住宅工业科技有限公司 | Low-cost light plastering gypsum mortar and preparation method thereof |
| CN116283023A (en) * | 2023-04-04 | 2023-06-23 | 海南蓝岛环保产业股份有限公司 | High-performance composite early-strength ultrafine powder and preparation method and application thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112430036A (en) * | 2020-11-30 | 2021-03-02 | 湖北工业大学 | In-situ preparation method of cementing material for offshore area infrastructure |
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| CN116283023B (en) * | 2023-04-04 | 2024-02-09 | 海南蓝岛环保产业股份有限公司 | High-performance composite early-strength ultrafine powder and preparation method and application thereof |
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Application publication date: 20191108 |