CN104609752B - High-performance magnesium oxychloride cement material and application method thereof - Google Patents
High-performance magnesium oxychloride cement material and application method thereof Download PDFInfo
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- CN104609752B CN104609752B CN201510072942.5A CN201510072942A CN104609752B CN 104609752 B CN104609752 B CN 104609752B CN 201510072942 A CN201510072942 A CN 201510072942A CN 104609752 B CN104609752 B CN 104609752B
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Abstract
The invention discloses a high-performance magnesium oxychloride cement material and an application method thereof. The high-performance magnesium oxychloride cement material is prepared from the following components in parts by weight: 110-215 parts of phosphorous slag powder, 20-90 parts of micro-nano active admixture, 900-1070 parts of light calcined magnesia and 590 parts of MgCl2 aqueous solution having the baume degree of 27-29 B(e). The high-performance magnesium oxychloride cement material is characterized in that P2O5 in the phosphorous slag powder reacts with a magnesia- magnesium chloride-water system and glass body in the phosphorous slag powder takes part in a pozzolanic reaction with OH- to generate blue to white hydraulic phosphates and hydration products. In addition, the micro-nano active admixture is blended to further improve the strength and the water tolerance of the material. The magnesium oxychloride cement prepared is good in water tolerance, has the strength up to standard and is capable of consuming a large quantity of phosphorous slag in the macroscopic aspect; in the microscopic aspect, the hydration products are compact in arrangement and dense in structure. Meanwhile, the preparation method of the material is simple and easy to implement, fast and convenient, and economical and environment-friendly.
Description
Technical field
The invention belongs to inorganic functional material field, be related to a kind of high intensity, the magnesia oxychloride cement material of water-tolerant and
Its using method.
Background technology
Cement is widely used in the engineerings such as civil construction, water conservancy, national defence as a kind of important construction material.However,
Cement industry is resource and the industry of energy resource consumption type, and substantial amounts of CO can be discharged in production process2, often process 1 ton of cement and about produce
0.8 ton of CO2, Global Greenhouse Effect is exacerbated, strong influence is generated to ecological environment and the production of the mankind, life.1985
Since year, the volume of production of Chinese cement is sure to occupy the 1st, the world, also arranges while providing safeguard for China's infrastructure construction
The CO of amplification quantity2.With growth in the living standard, people are to environmental problem also growing interest.
For problem above, magnesia oxychloride cement comes out, and it is the air hardening cementitious materials with Mg as essential element, its production
During produce a small amount of CO, and absorb CO during the later stage is on active service2, with the premium properties such as high-strength light, wear-resisting, impervious, and
Its production technology is easy, and without the need for Thermal Equipments such as kiln, exsiccators, energy consumption can be substantially reduced, excellent with greatly developing
Gesture.But which belongs to air hardening cementitious materials, resistance to water is poor, and this defect seriously hinders its extensive application.
Phosphorus slag, China are the first big yellow phosphorus manufacturing country, but produce 1 ton of yellow phosphorus by 8-10 tons of slag of product.And phosphorus slag mostly reveals
Its stacking, does not only take up a large amount of soils, goes back contaminated soil and underground water source, gives people poultry safety and brings greatly threat.In phosphorus slag
Containing a large amount of SiO2、Al2O3And CaO isoreactivity materials, the intensity and durability of material can be improved.But the nowadays profit of phosphorus slag
With the 10% of rate deficiency yield, the significant wastage of limited resources is caused.
Contain P in phosphorus slag powder2O5, the phosphate of the hydraulicity, phosphorus slag can be generated with magnesium oxide-magnesium chloride-water system reaction
Vitreous body in powder can with and OH-Generation pozzolanic reaction, generates the hydrated product with the hydraulicity.
Comprehensive background above, it is proposed that one kind is on the basis of common magnesia oxychloride cement, adds phosphorus slag-micro-nano activity
The method of composite blend, so as to effectively increase the resistance to water and intensity of magnesia oxychloride cement.
The content of the invention
Present invention aim at providing a kind of high intensity, the magnesia oxychloride cement material of water-tolerant and its using method.
The purpose of the present invention is achieved through the following technical solutions：
A kind of high-performance magnesia oxychloride cement material, is made up of the component of following weight portion：Phosphorus slag powder 110-215 part is micro--to receive
Rice active admixture 20-90 parts, light calcined magnesia 900-1070 parts, MgCl of the Baume degrees for 27-29B é2590 parts of aqueous solution.
Preferably：Described phosphorus slag powder is 108 parts, micro-nano active admixture is 86.4 parts, light calcined magnesia 1005.6
Part, Baume degrees are 590 parts for the MgCl2 aqueous solutions of 27-29B é.Described micro-nano active admixture is micro-nano activity
SiO2。
MgCl of the described Baume degrees for 27-29B é2Aqueous solution is prepared in the following manner：The water of measured amounts, side
Add MgCl2•6H2O sides are measured with B, prepare magnesium chloride solution of the Baume degrees for 27-29B é.
P in described phosphorus slag powder2O5Mass percent be 1.05%.
In described light calcined magnesia, the mass percent of magnesium oxide is 78.88%.
A kind of using method of high-performance magnesia oxychloride cement material, comprises the following steps：
（1）The water of measured amounts, side add MgCl2•6H2O sides are measured with B, are configured to Baume degrees for 27-29B é
Magnesium chloride solution；
（2）By the phosphorus slag powder of 110-215 weight portions, the micro-nano active admixture of 20-85 weight portions, 900-1070 weights
The light calcined magnesia of amount part is added to the MgCl of the Baume degrees for 27-29B é of 590 weight portions together2In aqueous solution, stirring is obtained
Cement slurry.
Described whipping step is：First stirring at low speed 60s, stops 30s, then high-speed stirred 90s, stops stirring.
Application of the above-mentioned high-performance magnesia oxychloride cement material in building field.
The present invention is using P in phosphorus slag powder2O5With vitreous body and OH in magnesium oxide-magnesium chloride-aqueous systems reaction and phosphorus slag powder-
The characteristics of there is phosphate, the hydrated product of pozzolanic reaction generation cyan to the hydraulicity of white.In addition, mixing micro-nano work
Property mineral admixture can improve the intensity and resistance to water of this material once again.By macroscopical experimental test and Micro-Structure Analysis,
Prepared high-performance magnesia oxychloride cement water-tolerant in terms of macroscopic view is solved, intensity is up to standard, phosphorus slag of dissolving in a large number；In microcosmic side
Face hydrated product arranges compact, compact structure.At the same time, this material preparation method is simple, quick and convenient, economic ring
Protect.
The inventive method has following good effect：
1st, new magnesia oxychloride cement not only incorporates the utilization of common magnesia oxychloride cement low-carbon (LC) effect and phosphorus slag, and
The original defect of common magnesia oxychloride cement is improved, the resistance to water and intensity of material is enhanced, performance, the matter of product is improve
Amount, expands the scope of product, it is ensured that safe and applicable.
2nd, material source extensively, is drawn materials conveniently, and is effectively utilized the waste residues such as phosphorus slag, environmental protection, realizes real meaning
Energy-saving and emission-reduction in justice.New composite low cost, it is economic and practical.
3rd, the intensity of new material reaches standard and requires to only need to 8 hours or so, instant effect, later stage adverse effect
Little, intensity is high, is applicable to some engineerings for having special construction requirement.
4th, the phosphorus slag volume of new material is not a definite value, can be according to different engineering strength life requirements, suitably
Adjustment phosphorus slag volume, realizes at utmost utilizing phosphorus slag.
Description of the drawings
Field emission scanning electron microscope analysis is carried out to embodiment 7, embodiment 8 and 10 test specimen of embodiment, hydrated product is observed
The intensity and resistance to water mechanism of the research materials such as pattern, granularity and spatial distribution, as shown in Figure 1-Figure 3:
Field emission scanning electron microscope analysis charts of the Fig. 1 for the embodiment of the present invention 7；Fig. 1（A）Represent not soaked, Fig. 1（B）Represent
After soaked.
Field emission scanning electron microscope analysis charts of the Fig. 2 for the embodiment of the present invention 8；Fig. 2（A）Represent not soaked, Fig. 2（B）Represent
After soaked.
Field emission scanning electron microscope analysis charts of the Fig. 3 for the embodiment of the present invention 10；Fig. 3（A）Represent not soaked, Fig. 3（B）Represent
After soaked.
Specific embodiment
The present invention is expanded on further below by embodiment.Blender employed in following examples is JJ-5 type planets
Formula glue sand agitator, this device specification is：Rotation:140 ± 5R/MIN of low speed, 285 ± 10R/MIN of high speed；Revolution：Low speed
62 ± 5R/MIN, 125 ± 10R/MIN of high speed.
The main component of micro-nano active admixture is active SiO2, the main component such as table 1 of other raw materials for being adopted
With shown in table 2：
The chemical composition of 1 light calcined magnesia of table（%）
| MgO | Al2O3 | SiO2 | P2O5 | SO3 | K2O | CaO | Fe2O3 | Cl | Loss on ignition |
| 78.88 | 0.26 | 6.50 | 0.04 | 0.24 | 0.02 | 1.32 | 0.26 | 0.06 | 12.42 |
The chemical composition of 2 experimental study phosphorus-slag-powder of table（%）
| SiO2 | Al2O3 | Fe2O3 | MgO | CaO | Na2O | K2O | TiO2 | P2O5 | MnO | Loss on ignition |
| 23.46 | 2.61 | 1.04 | 1.56 | 47.92 | 0.25 | 0.88 | 0.12 | 1.05 | 0.04 | 21.24 |
Embodiment 1
1）The water of 1000mL is measured, MgCl is gradually added2·6H2O, is measured with B, is configured to Baume degrees and is
The magnesium chloride solution of 27 ° of B é；
2）By the phosphorus slag powder of 108g, the micro-nano active admixture of 21.6g, 1070.4g light calcined magnesias, 590g chlorinations
Magnesium solution is poured into and is stirred in the planetary glue sand agitator of JJ-5 types, control low rate mixing 1 minute, 30 seconds interval times, soon
Speed stirs 1 point 30 seconds；When initial, low rate mixing can prevent powdered ingredients from flying out, then quick to stir, can be when shorter
It is interior to obtain more sufficient stirring；
3）Take appropriate step（2）In mixture, using Vicat apparatus determine slurry denseness, control examination cone submergence depth
For（38±2）Mm, after meeting the requirements, mixture is poured in the die trial of 40mm × 40mm × 160mm, and form removal after 24h is placed in
Indoor Natural is conserved；
4）With reference to GBT 17671-1999《Test method for strength of hydraulic cement mortar (ISO methods)》, after natural curing 28 days, take
Wherein half test specimen carries out anti-folding and anti-pressing test, and test data is shown in Table 3；Second half test specimen was conserved in being put into water, per 10 days
A water is changed, 28 days is treated afterwards, the bending and compressive strength of soaked rear test specimen is measured, and is calculated coefficient of softing, data are shown in Table 3.
Embodiment 2
1）The water of 1000mL is measured, MgCl is gradually added2·6H2O, is measured with B, is configured to Baume degrees and is
The magnesium chloride solution of 27 ° of B é；
2）The phosphorus slag powder of 162g, the micro-nano active admixture of 54g, 984g light calcined magnesias are weighed, meanwhile, weigh
590g steps 1）The magnesium chloride solution prepared；
3）Will be the phosphorus slag powder of 162g, the micro-nano active admixture of 54g, 984g light calcined magnesias, 590g magnesium chlorides molten
Liquid is poured into and is stirred in the planetary glue sand agitator of JJ-5 types, control low rate mixing 1 minute, 30 seconds interval times, is quickly stirred
Mix 1 point 30 seconds；
4）Take appropriate step（3）In mixture, using Vicat apparatus determine slurry denseness, control examination cone submergence depth
For（38±2）Mm, after meeting the requirements, mixture is poured in the die trial of 40mm × 40mm × 160mm, and form removal after 24h is placed in
Indoor Natural is conserved；
5）With reference to GBT 17671-1999《Test method for strength of hydraulic cement mortar (ISO methods)》, after natural curing 28 days, take
Wherein half test specimen carries out anti-folding and anti-pressing test, and test data is shown in Table 3；Second half test specimen was conserved in being put into water, per 10 days
A water is changed, 28 days is treated afterwards, the bending and compressive strength of soaked rear test specimen is measured, and is calculated coefficient of softing, data are shown in Table 3.
Embodiment 3
1）The water of 1000mL is measured, MgCl is gradually added2·6H2O, is measured with B, is configured to Baume degrees and is
The magnesium chloride solution of 27 ° of B é；
2）The phosphorus slag powder of 216g, the micro-nano active admixture of 86.4g, 897.6g light calcined magnesias are weighed, meanwhile, claim
Take 590g steps 1）The magnesium chloride solution prepared；
3）By the phosphorus slag powder of 216g, the micro-nano active admixture of 86.4g, 897.6g light calcined magnesias, 590g chlorinations
Magnesium solution is poured into and is stirred in the planetary glue sand agitator of JJ-5 types, control low rate mixing 1 minute, 30 seconds interval times, soon
Speed stirs 1 point 30 seconds；
4）Take appropriate step 3）In mixture, using Vicat apparatus determine slurry denseness, control examination bore submergence depth be
（38±2）Mm, after meeting the requirements, mixture is poured in the die trial of 40mm × 40mm × 160mm, and form removal after 24h is placed in room
Interior natural curing；
5）With reference to GBT 17671-1999《Test method for strength of hydraulic cement mortar (ISO methods)》, after natural curing 28 days, take
Wherein half test specimen carries out anti-folding and anti-pressing test, and test data is shown in Table 3；Second half test specimen was conserved in being put into water, per 10 days
A water is changed, 28 days is treated afterwards, the bending and compressive strength of soaked rear test specimen is measured, and is calculated coefficient of softing, data are shown in Table 3.
Embodiment 4
1）The water of 1000mL is measured, MgCl is gradually added2·6H2O, is measured with B, is configured to Baume degrees and is
The magnesium chloride solution of 28 ° of B é；
2）The phosphorus slag powder of 108g, the micro-nano active admixture of 54g, 1038g light calcined magnesias are weighed, meanwhile, weigh
590g above-mentioned steps 1）The magnesium chloride solution prepared；
3）Will be the phosphorus slag powder of 108g, the micro-nano active admixture of 54g, 1038g light calcined magnesias, 590g magnesium chlorides molten
Liquid is poured into and is stirred in the planetary glue sand agitator of JJ-5 types, control low rate mixing 1 minute, 30 seconds interval times, is quickly stirred
Mix 1 point 30 seconds；
4）Take appropriate step 3）In mixture, using Vicat apparatus determine slurry denseness, control examination bore submergence depth be
（38±2）Mm, after meeting the requirements, mixture is poured in the die trial of 40mm × 40mm × 160mm, and form removal after 24h is placed in room
Interior natural curing；
5）With reference to GBT 17671-1999《Test method for strength of hydraulic cement mortar (ISO methods)》, after natural curing 28 days, take
Wherein half test specimen carries out anti-folding and anti-pressing test, and test data is shown in Table 3；Second half test specimen was conserved in being put into water, per 10 days
A water is changed, 28 days is treated afterwards, the bending and compressive strength of soaked rear test specimen is measured, and is calculated coefficient of softing, data are shown in Table 3.
Embodiment 5
1）The water of 1000mL is measured, MgCl is gradually added2·6H2O, is measured with B, is configured to Baume degrees and is
The magnesium chloride solution of 28 ° of B é；
2）Weigh the phosphorus slag powder of 162g, the micro-nano active admixture of 86.4g, 951.6g light calcined magnesias, meanwhile, claim
Take 590g above-mentioned steps 1）The magnesium chloride solution prepared；
3）By the phosphorus slag powder of 162g, the micro-nano active admixture of 86.4g, 951.6g light calcined magnesias, 590g chlorinations
Magnesium solution is poured into and is stirred in the planetary glue sand agitator of JJ-5 types, control low rate mixing 1 minute, 30 seconds interval times, soon
Speed stirs 1 point 30 seconds；
4）Take appropriate step 3）In mixture, using Vicat apparatus determine slurry denseness, control examination bore submergence depth be
（38±2）Mm, after meeting the requirements, mixture is poured in the die trial of 40mm × 40mm × 160mm, and form removal after 24h is placed in room
Interior natural curing；
5）With reference to GBT 17671-1999《Test method for strength of hydraulic cement mortar (ISO methods)》, after natural curing 28 days, take
Wherein half test specimen carries out anti-folding and anti-pressing test, and test data is shown in Table 3；Second half test specimen was conserved in being put into water, per 10 days
A water is changed, 28 days is treated afterwards, the bending and compressive strength of soaked rear test specimen is measured, and is calculated coefficient of softing, data are shown in Table 3.
Embodiment 6
1）The water of 1000mL is measured, MgCl is gradually added2·6H2O, is measured with B, is configured to Baume degrees and is
The magnesium chloride solution of 28 ° of B é；
2）The phosphorus slag powder of 216g, the micro-nano active admixture of 21.6g, 962.4g light calcined magnesias are weighed, meanwhile, claim
Take 590g steps 1）The magnesium chloride solution prepared；
3）By the phosphorus slag powder of 216g, the micro-nano active admixture of 21.6g, 962.4g light calcined magnesias, 590g chlorinations
Magnesium solution is poured into and is stirred in the planetary glue sand agitator of JJ-5 types, control low rate mixing 1 minute, 30 seconds interval times, soon
Speed stirs 1 point 30 seconds；
4）Take appropriate step 3）In mixture, using Vicat apparatus determine slurry denseness, control examination bore submergence depth be
（38±2）Mm, after meeting the requirements, mixture is poured in the die trial of 40mm × 40mm × 160mm, and form removal after 24h is placed in room
Interior natural curing；
5）With reference to GBT 17671-1999《Test method for strength of hydraulic cement mortar (ISO methods)》, after natural curing 28 days, take
Wherein half test specimen carries out anti-folding and anti-pressing test, and test data is shown in Table 3；Second half test specimen was conserved in being put into water, per 10 days
A water is changed, 28 days is treated afterwards, the bending and compressive strength of soaked rear test specimen is measured, and is calculated coefficient of softing, data are shown in Table 3.
Embodiment 7
1）The water of 1000mL is measured, MgCl is gradually added2·6H2O, is measured with B, is configured to Baume degrees and is
The magnesium chloride solution of 29 ° of B é；
2）The phosphorus slag powder of 108g, the micro-nano active admixture of 86.4g, 1005.6g light calcined magnesias are weighed, meanwhile,
Weigh 590g steps 1）The magnesium chloride solution prepared；
3）By the phosphorus slag powder of 108g, the micro-nano active admixture of 86.4g, 1005.6g light calcined magnesias, 590g chlorinations
Magnesium solution is poured into and is stirred in the planetary glue sand agitator of JJ-5 types, control low rate mixing 1 minute, 30 seconds interval times, soon
Speed stirs 1 point 30 seconds；
4）Take appropriate step 3）In mixture, using Vicat apparatus determine slurry denseness, control examination bore submergence depth be
（38±2）Mm, after meeting the requirements, mixture is poured in the die trial of 40mm × 40mm × 160mm, and form removal after 24h is placed in room
Interior natural curing；
5）With reference to GBT 17671-1999《Test method for strength of hydraulic cement mortar (ISO methods)》, after natural curing 28 days, take
Wherein half test specimen carries out anti-folding and anti-pressing test, and test data is shown in Table 3；Second half test specimen was conserved in being put into water, per 10 days
A water is changed, 28 days is treated afterwards, the bending and compressive strength of soaked rear test specimen is measured, and is calculated coefficient of softing, data are shown in Table 3.
Such as Fig. 1（A）Shown, not soaked sample structure is closely knit, and has more spicule, and Jing XRD determining analysis shows are
518 phases.And Jing after soaked, such as Fig. 1（B）Shown, part hydrated product is dissolved, but remains to see clearly spicule and larger
Crystalline particle, this is also that 7 resistance to water of embodiment is stronger, the reason for coefficient of softing is larger.
Embodiment 8
1）The water of 1000mL is measured, MgCl is gradually added2·6H2O, is measured with B, is configured to Baume degrees and is
The magnesium chloride solution of 29 ° of B é；
2）The phosphorus slag powder of 162g, the micro-nano active admixture of 21.6g, 1016.4g light calcined magnesias are weighed, meanwhile,
Weigh 590g steps 1）The magnesium chloride solution prepared；
3）By the phosphorus slag powder of 162g, the micro-nano active admixture of 21.6g, 1016.4g light calcined magnesias, 590g chlorinations
Magnesium solution is poured into and is stirred in the planetary glue sand agitator of JJ-5 types, control low rate mixing 1 minute, 30 seconds interval times, soon
Speed stirs 1 point 30 seconds；
4）Take appropriate step 3）In mixture, using Vicat apparatus determine slurry denseness, control examination bore submergence depth be
38 ± 2mm, after meeting the requirements, mixture is poured in the die trial of 40mm × 40mm × 160mm, and form removal after 24h is disposed within
Natural curing；
5）With reference to GBT 17671-1999《Test method for strength of hydraulic cement mortar (ISO methods)》, after natural curing 28 days, take
Wherein half test specimen carries out anti-folding and anti-pressing test, and test data is shown in Table 3；Second half test specimen was conserved in being put into water, per 10 days
A water is changed, 28 days is treated afterwards, the bending and compressive strength of soaked rear test specimen is measured, and is calculated coefficient of softing, data are shown in Table 3.
First by embodiment 8 not soaked test specimen（Fig. 2（A））With the not soaked test specimen of embodiment 7（Fig. 1（A））Compare, can be with
Find out that the microstructure of 8 test specimen of embodiment is more closely knit, spatial arrangements are more compact, and configuration of surface is risen and fallen in order, this is embodiment 8
Micro-foundation of the intensity more than embodiment 7.Form after soaked for embodiment 8（Fig. 2（B））, it can be observed that it is internal existing
Clearly crackle, and with compared with macroscopic-void, also not as soaked front regular, crystalline particle has been scattered, and this is its softening for arrangement
The basic reason that coefficient drastically diminishes.
Embodiment 9
1）The water of 1000mL is measured, MgCl is gradually added2·6H2O, is measured with B, is configured to Baume degrees and is
The magnesium chloride solution of 29 ° of B é；
2）Weigh phosphorus slag powder, the micro-nano active admixture of 54g of 216g, 930g light calcined magnesias, meanwhile, weigh
590g steps 1）The magnesium chloride solution prepared；
3）By the phosphorus slag powder of 216g, the micro-nano active admixture of 54g, 930g light calcined magnesias, 590g magnesium chloride solutions
Pour in blender and be stirred, control low rate mixing 1 minute is 30 seconds interval times, quick to stir 1 point 30 seconds；
4）Take appropriate step 3）In mixture, using Vicat apparatus determine slurry denseness, control examination bore submergence depth be
（38±2）Mm, after meeting the requirements, mixture is poured in the die trial of 40mm × 40mm × 160mm, and form removal after 24h is placed in room
Interior natural curing；
5）With reference to GBT 17671-1999《Test method for strength of hydraulic cement mortar (ISO methods)》, after natural curing 28 days, take
Wherein half test specimen carries out anti-folding and anti-pressing test, and test data is shown in Table 3；Second half test specimen was conserved in being put into water, per 10 days
A water is changed, 28 days is treated afterwards, the bending and compressive strength of soaked rear test specimen is measured, and is calculated coefficient of softing, data are shown in Table 3.
Embodiment 10（Blank assay）
1）The water of 1000mL is measured, MgCl is gradually added2·6H2O, is measured with B, is configured to Baume degrees and is
The magnesium chloride solution of 29 ° of B é；
2）The phosphorus slag powder of 0g, the micro-nano active admixture of 0g, 1200g light calcined magnesias are weighed, meanwhile, weigh 590g
Step 1）The magnesium chloride solution prepared；
3）By the phosphorus slag powder of 0g, the micro-nano active admixture of 0g, 1200g light calcined magnesias, 590g magnesium chloride solutions
Pour into and be stirred in the planetary glue sand agitator of JJ-5 types, control is at a slow speed（140±5R/MIN）Stirring 1 minute, interval time
It is 30 seconds, quick to stir 1 point 30 seconds；
4）Take appropriate step 3）In mixture, using Vicat apparatus determine slurry denseness, control examination bore submergence depth be
（38±2）Mm, after meeting the requirements, mixture is poured in the die trial of 40mm × 40mm × 160mm, and form removal after 24h is placed in room
Interior natural curing；
5）With reference to GBT 17671-1999《Test method for strength of hydraulic cement mortar (ISO methods)》, after natural curing 28 days, take
Wherein half test specimen carries out anti-folding and anti-pressing test, and test data is shown in Table 3；Second half test specimen was conserved in being put into water, per 10 days
A water is changed, 28 days is treated afterwards, the bending and compressive strength of soaked rear test specimen is measured, and is calculated coefficient of softing, data are shown in Table 3.
3 rupture strength of table and comprcssive strength data
| Embodiment | Soaked front comprcssive strength/MPa | Soaked rear comprcssive strength/MPa | Coefficient of softing | Embodiment | Soaked front rupture strength/MPa | It is anti-after soaked to roll over strong/MPa | Coefficient of softing |
| 1 | 104.4 | 24.5 | 0.23 | 1 | 23.5 | 2.4 | 0.10 |
| 2 | 100.1 | 58.0 | 0.58 | 2 | 25.0 | 5.0 | 0.20 |
| 3 | 87.1 | 56.6 | 0.65 | 3 | 24.1 | 4.3 | 0.18 |
| 4 | 114.7 | 61.2 | 0.53 | 4 | 24.7 | 6.9 | 0.28 |
| 5 | 112.1 | 64.1 | 0.57 | 5 | 19.3 | 5.8 | 0.30 |
| 6 | 97.6 | 46.6 | 0.48 | 6 | 26.4 | 4.4 | 0.17 |
| 7 | 119.8 | 73.8 | 0.62 | 7 | 24.8 | 9.6 | 0.39 |
| 8 | 125.0 | 50.8 | 0.41 | 8 | 29.8 | 5.4 | 0.18 |
| 9 | 118.0 | 71.0 | 0.60 | 9 | 25.1 | 5.0 | 0.20 |
| 10 | 105.9 | 51.5 | 0.49 | 10 | 22.7 | 3.0 | 0.13 |
From table 3, we are it will be clear that soaked front comprcssive strength is generally larger, although strong after soaked 28d
Degree has greater loss, but maximum intensity remains to reach 73.8MPa in embodiment 7, and coefficient of softing is higher than 0.6, with respect to embodiment
10（Namely blank group）There is larger improvement.
As pure magnesia oxychloride cement, it is either soaked or soaked after, pure magnesia oxychloride cement grain crystalline is more thin
It is little.Not soaked test specimen fractions distribution is extremely uneven, compared with embodiment 7 and embodiment 8, rare spicule and bulk granule.Bubble
Produce many places crack after water, it is serious that the effect of water causes that surface comes off, and this also reflects the less original of blank group coefficient of softing
Cause.
For rupture strength, the coefficient of softing of embodiment 7 is maximum, considerably beyond blank group, and the anti-folding after soaked 28
Intensity is up to 9.6MPa, but through examining, find soaked front rupture strength maximum is embodiment 8, but soaked rear strong
Degree declines to a great extent to 5.4MPa.
Claims (8)
1. a kind of high-performance magnesia oxychloride cement material, it is characterised in that be made up of the component of following weight portion：108 parts of phosphorus slag powder,
86.4 parts of micro-nano active admixture, 1005.6 parts of light calcined magnesia, Baume degrees are the MgCl of 29 ° of B é2Aqueous solution is 590 parts.
2. high-performance magnesia oxychloride cement material according to claim 1, it is characterised in that：Described micro-nano activity is mixed
Material is closed for micro-nano activity SiO2。
3. high-performance magnesia oxychloride cement material according to claim 1, it is characterised in that：Described Baume degrees are 29 ° of B é
MgCl2Aqueous solution is prepared in the following manner：The water of measured amounts, side add MgCl2·6H2O sides are with the B amount of carrying out
Survey, be configured to the magnesium chloride solution that Baume degrees are 29 ° of B é.
4. high-performance magnesia oxychloride cement material according to claim 1, it is characterised in that：P in described phosphorus slag powder2O5's
Mass percent is 1.05%.
5. high-performance magnesia oxychloride cement material according to claim 1, it is characterised in that：Oxygen in described light calcined magnesia
The mass percent for changing magnesium is 78.88%.
6. a kind of using method of high-performance magnesia oxychloride cement material, it is characterised in that comprise the following steps：
(1) water of measured amounts, side add MgCl2·6H2O sides are measured with B, are configured to the chlorination that Baume degrees are 29B é
Magnesium solution；
(2) by the phosphorus slag powder of 108 weight portions, the micro-nano active admixture of 86.4 weight portions, 1005.6 weight portions light-burned oxygen
Change magnesium is added to the MgCl that the Baume degrees of 590 weight portions are 29 ° of B é together2In aqueous solution, stirring obtains cement slurry；Maintenance bar
Part culture,.
7. the using method of high-performance magnesia oxychloride cement material according to claim 6, it is characterised in that：Described stirring
Step is：First stirring at low speed 60s, stops 30s, then high-speed stirred 90s, stops stirring.
8. application of the high-performance magnesia oxychloride cement material described in claim 1 in building field.
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| RU2121987C1 (en) * | 1997-09-01 | 1998-11-20 | Михаил Витальевич Усов | Method of manufacturing building materials with magnesia binding agent |
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