CN107352834B - A kind of magnesite binding material water resistant reinforced modifier formula and preparation method - Google Patents
A kind of magnesite binding material water resistant reinforced modifier formula and preparation method Download PDFInfo
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- CN107352834B CN107352834B CN201710559024.4A CN201710559024A CN107352834B CN 107352834 B CN107352834 B CN 107352834B CN 201710559024 A CN201710559024 A CN 201710559024A CN 107352834 B CN107352834 B CN 107352834B
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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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- Organic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
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Abstract
The invention belongs to magnesite gel modifier technical fields, propose a kind of magnesite binding material water resistant reinforced modifier formula and preparation method, its formula is grouped as by the group of following parts by weight: 28~32 parts of water, 28~32 parts of industrial methanol, 8~12 parts of benzoic acid, 13~17 parts of higher fatty acid salt, 4~7 parts of EVA lotion, 8~12 parts of sodium metasilicate.The present invention solves the technical problem that magnesite binding material modifier modification effect is bad in the prior art.
Description
Technical field
The invention belongs to magnesite gel modifier technical field, it is related to a kind of magnesite binding material water resistant reinforced modifier and matches
Side and preparation method.
Background technique
Magnesite binding material is also known as magnesia cement, is a kind of air-setting gelling that French scholar Sorel was proposed in 1867
Material, since there is China's magnesite Resource management abundant and magnesite material there is hardness to increase fast, anti-folding and anti-pressing
It is good, intensity is high, alkalinity is weak, corrosivity is low, elastic height, good toughness, it is light-weight and to organic-inorganic or fiber with preferably
Adhesive property the advantages that, more than one since century different types of magnesite material product have been introduced into urban construction, building
The every field such as engineering, agricultural production and environmental protection, but since this material product is more sensitive to environmental change, high temperature is high
It is easy damp suction surface halide accumulation under the conditions of wet, and phenomena such as with scum and product easy buckling deformation, has seriously affected the use of product
Performance.In order to overcome this defect, people have carried out a large amount of test, and some is using Adlerika instead of magnesium chloride solution
Technical solution, although can overcome drawbacks described above, the intensity of product but reduces larger, and the effect is unsatisfactory, also adopts
With the maintenance plan that the product after rigid demoulding is placed in water to immersion, but it is this conserve the intensity that also will be greatly reduced product, and
And this scheme maintenance magnesite product has been forbidden to use in industry at present, although there are also some modifying agent modified effects are preferable,
It is expensive, competitiveness in the market is reduced, therefore research and develop a kind of magnesite binding material that modified effect is good and at low cost
The technical issues of modifying agent is current urgent need to resolve.
Summary of the invention
The invention proposes a kind of magnesite binding material water resistant reinforced modifier formula and preparation methods, solve above-mentioned skill
Art problem.
The technical scheme of the present invention is realized as follows:
A kind of magnesite binding material water resistant reinforced modifier formula, is grouped as by the group of following parts by weight: 28~32 parts of water,
28~32 parts of industrial methanol, 8~12 parts of benzoic acid, 13~17 parts of higher fatty acid salt, 4~7 parts of EVA lotion, sodium metasilicate 8~12
Part.
Further, optimization formula is grouped as by the group of following parts by weight: 30 parts of water, 30 parts of industrial methanol, and 10 parts of benzoic acid,
15 parts of higher fatty acid salt, 5 parts of EVA lotion, 10 parts of sodium metasilicate.
Further, the higher fatty acid salt is specially the alkali metal salt that fatty carbon chain length is 12-24 carbon.
A kind of magnesite binding material water resistant reinforced modifier preparation method, preparation method the following steps are included:
(1) according to the parts by weight in formula weigh water, industrial methanol, benzoic acid, higher fatty acid salt, EVA lotion with
And sodium metasilicate；
(2) weighed sodium metasilicate in step (1) and water are dissolved under the conditions of 40 DEG C~50 DEG C, obtains silicon after mixing evenly
The aqueous solution of sour sodium；
(3) by weighed industrial methanol, benzoic acid, higher fatty acid salt and EVA lotion in step (1) 40 DEG C~50
Mixed dissolution under the conditions of DEG C, obtains mixed solution after mixing evenly；
(4) mixed solution obtained in aqueous solution and step (3) that step (2) obtains is sufficiently mixed, and stirred equal
It is even, as magnesite binding material water resistant reinforced modifier.
Compared with prior art, it working principle of the present invention and has the beneficial effect that
1, magnesia cement material composition magnesia is calcined then under the conditions of 800-1000 celsius temperature by magnesite
Made of ground, after product is made, there are capillary porosity between feed particles, water resistant reinforced modifier prepared by the present invention adds
After entering into magnesite slurry, the pore surface inside magnesia cement will form very thin hydrophobic membrane and at the same time exposed
Outer surface also forms hydrophobic membrane, it is made to come with air insulated, reduces the chance for absorbing moisture in air.
2, each component in inventive formulation is common materials, at low cost, and water resistant prepared by the present invention enhancing changes
Property agent have the function of stronger diminishing, can reduce the brine dosage in cementitious matter in this way, reduce the amount of free magnesium chloride, and change
Property agent in the acid that is formed after benzoic acid, higher fatty acid salt and EVA latex composite compounding and acid ion can be in conjunction with free magnesium
Ion forms micro emulsion and blocks capillary channel, and the possibility for reducing the damp suction surface halide accumulation of product improves the water resistance and intensity of product.
Specific embodiment
It is clearly and completely described below in conjunction with the technical solution in the embodiment of the present invention, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff every other embodiment obtained without creative efforts belongs to what the present invention protected
Range.
Embodiment one:
28g water and 8g sodium metasilicate are mixed to dissolution under the conditions of 40 DEG C~50 DEG C, obtain the aqueous solution of sodium metasilicate；It will
Dissolution is mixed in 28g industrial methanol, 8g benzoic acid, 13g higher fatty acid salt, 4gEVA lotion under the conditions of 40 DEG C~50 DEG C,
Mixed solution is obtained after mixing evenly；It is the present invention after the aqueous solution of above-mentioned sodium metasilicate and mixed solution are mixed evenly
Magnesite binding material water resistant reinforced modifier.
Embodiment two:
30g water and 10g sodium metasilicate are mixed to dissolution under the conditions of 40 DEG C~50 DEG C, obtain the aqueous solution of sodium metasilicate；
30g industrial methanol, 10g benzoic acid, 15g higher fatty acid salt, 5gEVA lotion are mixed under the conditions of 40 DEG C~50 DEG C molten
Solution, obtains mixed solution after mixing evenly；It is this after the aqueous solution of above-mentioned sodium metasilicate and mixed solution are mixed evenly
Invention magnesite binding material water resistant reinforced modifier.
Embodiment three:
32g water and 12g sodium metasilicate are mixed to dissolution under the conditions of 40 DEG C~50 DEG C, obtain the aqueous solution of sodium metasilicate；
32g industrial methanol, 12g benzoic acid, 17g higher fatty acid salt, 7gEVA lotion are mixed under the conditions of 40 DEG C~50 DEG C molten
Solution, obtains mixed solution after mixing evenly；It is this after the aqueous solution of above-mentioned sodium metasilicate and mixed solution are mixed evenly
Invention magnesite binding material water resistant reinforced modifier.
It is tested by net slurry, i.e., does not add the magnesite of any modifying agent, optimum oxidation magnesium and magnesium chloride proportion are determined, in oxygen
Under the premise of changing magnesium and magnesium chloride optimum fiting ratio, formed with tri- gang mould of standard 40mm × 40mm × 160mm, measure respectively its 7
Its flexural strength, 28 days compression strength, immersion 7 days, the performance of 28 days resistance to compression coefficient of softing to characterize modified material are surveyed
Test result is as described in Table 1:
1 water resistant reinforced modifier test result of table
Wherein, blank control is not add the magnesite gelling of any modifying agent, and control 1 and control 2 are existing in the market
Two kinds of modifying agent, modifying agent additive amount are the 1% of magnesia quality.
As can be seen from Table 1, after material soaks 28 days after addition modifying agent, coefficient of softing all 0.9 or more, has long-term
Water resistance, and 7 days and 28 days resistance to compression coefficient of softing have respectively reached 0.939 He after the modifying agent addition of inventive formulation preparation
0.940 or more, better than other formulas in the market, and the formula of the embodiment two in the present invention is optimization formula.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of magnesite binding material water resistant reinforced modifier, which is characterized in that be grouped as by the group of following parts by weight: water 28 ~
32 parts, 28 ~ 32 parts of industrial methanol, 8 ~ 12 parts of benzoic acid, 13 ~ 17 parts of higher fatty acid salt, 4 ~ 7 parts of EVA lotion, sodium metasilicate 8 ~ 12
Part.
2. a kind of magnesite binding material water resistant reinforced modifier according to claim 1, which is characterized in that by following weight
The group of part is grouped as: 30 parts of water, 30 parts of industrial methanol, and 10 parts of benzoic acid, 15 parts of higher fatty acid salt, 5 parts of EVA lotion, silicic acid
10 parts of sodium.
3. a kind of magnesite binding material water resistant reinforced modifier according to claim 1, which is characterized in that the advanced rouge
Fat hydrochlorate is specially the alkali metal salt that fatty carbon chain length is 12-24 carbon.
4. a kind of magnesite binding material water resistant reinforced modifier preparation method, which is characterized in that any one according to claim 1 ~ 3
Described in modifying agent, preparation method the following steps are included:
(1) water, industrial methanol, benzoic acid, higher fatty acid salt, EVA lotion and sodium metasilicate are weighed according to parts by weight；
(2) weighed sodium metasilicate in step (1) and water are dissolved under the conditions of 40 DEG C ~ 50 DEG C, obtains sodium metasilicate after mixing evenly
Aqueous solution；
(3) by weighed industrial methanol, benzoic acid, higher fatty acid salt and EVA lotion in step (1) in 40 DEG C ~ 50 DEG C items
Mixed dissolution under part, obtains mixed solution after mixing evenly；
(4) mixed solution obtained in aqueous solution and step (3) that step (2) obtains is sufficiently mixed, and stirred evenly, i.e.,
For magnesite binding material water resistant reinforced modifier.
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| CN1118440C (en) * | 2001-09-19 | 2003-08-20 | 山东省建筑科学研究院 | Prepn of water-reducing and surface halide accumulation resisting modifier for magnesite binding material |
| KR100499343B1 (en) * | 2002-11-27 | 2005-07-04 | 장산방수산업(주) | Waterproof admixture for concrete having a corrosion inhibition function |
| CN102424540B (en) * | 2011-08-11 | 2013-01-09 | 南昌大学 | Preparation method for magnesite material water resistance modifier, and use method thereof |
| CN106866104A (en) * | 2017-02-27 | 2017-06-20 | 江西省建筑材料工业科学研究设计院 | A kind of magnesite water resistant modifying agent |
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