CN109734411A - A kind of preparation method of Water Resistant Magnesium Oxychloride based cementitious material - Google Patents
A kind of preparation method of Water Resistant Magnesium Oxychloride based cementitious material Download PDFInfo
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- CN109734411A CN109734411A CN201910150648.XA CN201910150648A CN109734411A CN 109734411 A CN109734411 A CN 109734411A CN 201910150648 A CN201910150648 A CN 201910150648A CN 109734411 A CN109734411 A CN 109734411A
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- waste residue
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Abstract
The present invention relates to a kind of preparation method of magnesium-based cementitious material, specific steps are as follows: abraum salt acid solution is added in Adlerika stirs evenly by weight, magnesia is then added and slurry is made in the stirring of polysilicon waste residue, then cement products is made in pouring molding.The present invention prepares magnesium cement using waste hydrochloric acid, polysilicon waste residue as modifying agent, can be obviously improved the water resistance of material.This method simple process solves the disadvantage that magnesium cement poor water resistance, can reduce the production cost of building materials enterprise；Meanwhile the resource utilization of waste hydrochloric acid and polysilicon waste residue is realized, reduce the pollution to environment and treatment cost.
Description
Technical field
The present invention relates to a kind of preparation methods of Water Resistant Magnesium Oxychloride based cementitious material, in particular to one kind is with waste hydrochloric acid, polycrystalline
Silicon waste residue is the method that modifying agent improves magnesia-based cements construction material water resistance.
Background technique
Magnesium cement product has that volume stability is high, light, fire resisting, basicity are low, good decorating effect, nonhygroscopic anti-halogen, right
The advantages that reinforcement corrosion effect is small makes it have more advantage on production decoration, finishing material.But the defect of its poor water resistance, limit
Application is made.Therefore, the magnesium-based cementitious material of water resistance is researched and developed, it is imperative.In order to solve magnesium cement poor water resistance
Problem, the addition of additive become the more extensive method of research at present.
Polysilicon waste residue is to produce the solid waste that generates in polysilicon process, at present country's polycrystalline baby waste residue mainly with
Stockpiling and the mode simply filled are handled, and a large amount of soils are not only taken up, and have certain toxic, if cannot be subject in time
Rationally disposition and safe utilization, will cause environmental pollution and the wasting of resources, it is very intractable that this has become production of polysilicon enterprise
The problem of.Hydrochloric acid is a kind of common industrial chemicals, and the pickling for being widely used in chemical industry, steel, plating and steel structural part is raw
It produces, it is annual to generate a large amount of hydrochloric waste water.It is water-fast to solve magnesium cement using waste hydrochloric acid, polysilicon waste residue as modifying agent by the present invention
Property difference problem, so that reluctant industrial residue is made the best use of everything.
Summary of the invention
The present invention provides a kind of preparation method of Water Resistant Magnesium Oxychloride based cementitious material, using waste hydrochloric acid and polysilicon waste residue as
Composite modifier improves the water resistance of its product for the production and application of magnesium cement constructional material.
A kind of preparation method of Water Resistant Magnesium Oxychloride based cementitious material, specific steps are as follows: first prepare Adlerika, by weight will
Abraum salt acid solution, which is added in Adlerika, to stir evenly, and polysilicon waste residue is then added and stirs evenly, sufficiently after reaction, then
Magnesia is added, slurry is made, then magnesium cement product is made in pouring molding.
In the above-mentioned methods, the ratio of the waste hydrochloric acid, polysilicon waste residue, magnesium sulfate and magnesia be 1:(1.3~
3.9):53.8:74.6。
In the above-mentioned methods, the concentration of the spent acid is 10~30%.
In the above-mentioned methods, the polysilicon waste residue is the waste residue generated in polysilicon production process, primary chemical composition
For SiO2For 15~30%, Al2O3For 1~5%, CaO be 15~35%, Cl is 3~15%.
Beneficial effects of the present invention: the present invention prepares water resistance magnesium-based using waste hydrochloric acid, polysilicon waste residue as modifying agent
Cementitious material.In system of the invention, modifying agent can improve the hydrated product composition and hydrated product crystalline substance of magnesium-based cementitious material
Volume morphing is transformed into larger-size thick rodlike or needle bar shape aquation by the lesser laminar hydrated product (see attached drawing 1) of size
Product (see attached drawing 2), the porosity of hardenite reduces, compactness improves, and the composition and form of hydrated product, which act synergistically, to be improved
The water resistance of material.This method simple process solves the disadvantage that magnesium cement poor water resistance, reduces magnesium cement building material enterprise
Production cost；Meanwhile realize the resource utilization of waste hydrochloric acid and polysilicon waste residue, reduce pollution to environment and administer at
This.
Detailed description of the invention
Fig. 1 is the electron microscopic picture (20000 times of amplification) of common magnesium oxysulfide concrete hydrated product；
Fig. 2 is the electron microscopic picture (20000 times of amplification) based on magnesium-based cementitious material hydrated product of the invention.
Specific embodiment
It elaborates with reference to embodiments to the present invention.The embodiment of the present invention and comparative example test method according to
GB/T1761-1999 " Test method for strength of hydraulic cement mortar " is marked to carry out.Become SiO using polysilicon waste residue primary chemical group2For
16.6%、Al2O3For 3.8%, CaO 28.9%, Cl 14.3%.
Comparative example one
It weighs 720 parts of Adlerikas (28 Baume degrees), then is mixed into even slurry with 1000 parts of magnesia, be injected into three
It in gang mould, demoulds afterwards for 24 hours, maintenance was to 7 days under natural conditions.Anti- folding, intensity test will be carried out after one group of test block drying；Separately
One group of test block is immersed in the water immersion 7 days, then carries out anti-folding, intensity test again.
Comparative example two
720 parts of Adlerikas (28 Baume degrees) are weighed to be uniformly mixed with 4 parts of hydrochloric acid (concentration 20%), then with 1000 parts of magnesia
It is mixed into even slurry, is injected into three gang moulds, demoulds afterwards for 24 hours, maintenance was to 7 days under natural conditions.One group of test block is done
Anti- folding, intensity test are carried out after dry；Another group of test block is immersed in the water immersion 7 days, then carries out anti-folding again, compression strength is surveyed
Examination.
Comparative example three
Weigh 720 parts of Adlerikas (28 Baume degrees), then with 1040 parts of siccatives (1000 parts of magnesia, 40 parts of anhydrous calcium chlorides)
It is mixed into even slurry, is injected into three gang moulds, demoulds afterwards for 24 hours, maintenance was to 7 days under natural conditions.One group of test block is done
Anti- folding, intensity test are carried out after dry；Another group of test block is immersed in the water immersion 7 days, then carries out anti-folding again, compression strength is surveyed
Examination.
Comparative example four
Weigh 720 parts of Adlerikas (28 Baume degrees), then with 1040 parts of siccatives (1000 parts of magnesia, 40 parts of polysilicon waste residues)
It is mixed into even slurry, is injected into three gang moulds, demoulds afterwards for 24 hours, maintenance was to 7 days under natural conditions.One group of test block is done
Anti- folding, intensity test are carried out after dry；Another group of test block is immersed in the water immersion 7 days, then carries out anti-folding again, compression strength is surveyed
Examination.
Embodiment one
It weighs 19.7 parts of waste hydrochloric acid (concentration 13.8%) and is added in 720 parts of Adlerikas (28 Baume degrees) and stir evenly, be added
It 27 parts of polysilicon waste residue, stirs evenly, is sufficiently added 1000 parts of magnesia after reaction, is mixed into even slurry, is injected into
It in three gang moulds, demoulds afterwards for 24 hours, maintenance was to 7 days under natural conditions.Anti- folding, intensity test will be carried out after one group of test block drying；
Another group of test block is immersed in the water immersion 7 days, then carries out anti-folding, intensity test again.
Embodiment two
It weighs 26.8 parts of waste hydrochloric acid (concentration 21.4%) and is added in 720 parts of Adlerikas (28 Baume degrees) and stir evenly, be added
It 34.8 parts of polysilicon waste residue, stirs evenly, is sufficiently added 1000 parts of magnesia after reaction, is mixed into even slurry, inject
It into three gang moulds, demoulds afterwards for 24 hours, maintenance was to 7 days under natural conditions.Anti- folding will be carried out after one group of test block drying, compression strength is surveyed
Examination；Another group of test block is immersed in the water immersion 7 days, then carries out anti-folding, intensity test again.
Embodiment three
It weighs 32.9 parts of waste hydrochloric acid (concentration 28.6%) and is added in 720 parts of Adlerikas (28 Baume degrees) and stir evenly, be added
It 45 parts of polysilicon waste residue, stirs evenly, is sufficiently added 1000 parts of magnesia after reaction, is mixed into even slurry, is injected into
It in three gang moulds, demoulds afterwards for 24 hours, maintenance was to 7 days under natural conditions.Anti- folding, intensity test will be carried out after one group of test block drying；
Another group of test block is immersed in the water immersion 7 days, then carries out anti-folding, intensity test again.
1 test result of table
Note: comparative example one~tetra-, there is netted cracking (individual test blocks are broken into several sections of) in test block after dry test block immersion, can not survey
Examination immersion intensity data.
Claims (4)
1. a kind of preparation method of Water Resistant Magnesium Oxychloride based cementitious material, it is characterised in that: first prepare Adlerika, will give up by weight
Hydrochloric acid solution is added in Adlerika and stirs evenly, and polysilicon waste residue is then added and stirs evenly, sufficiently after reaction, then plus
Enter magnesia and slurry is made, then magnesium cement product is made in pouring molding.
2. a kind of preparation method of Water Resistant Magnesium Oxychloride based cementitious material according to claim 1, it is characterised in that: the abraum salt
The ratio of acid, polysilicon waste residue, magnesium sulfate and magnesia is 1:(1.3~3.9): 53.8:74.6.
3. a kind of preparation method of Water Resistant Magnesium Oxychloride based cementitious material according to claim 1, it is characterised in that: the spent acid
Concentration be 10~30%.
4. a kind of preparation method of Water Resistant Magnesium Oxychloride based cementitious material according to claim 1, it is characterised in that: the polycrystalline
Silicon waste residue is the waste residue generated in polysilicon production process, and primary chemical group becomes SiO2For 15~30%, Al2O3For 1~5%,
CaO is 15~35%, Cl is 3~15%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113998979A (en) * | 2021-11-18 | 2022-02-01 | 高艳慧 | Inorganic welding agent, preparation method and assembly type building connection method |
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| CN113998979A (en) * | 2021-11-18 | 2022-02-01 | 高艳慧 | Inorganic welding agent, preparation method and assembly type building connection method |
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