CN103693873A - High-magnesium micro-expansive moderate heat Portland cement for water-power engineering and preparation method thereof - Google Patents
High-magnesium micro-expansive moderate heat Portland cement for water-power engineering and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a high-magnesium micro-expansive moderate heat Portland cement for water-power engineering and a preparation method thereof. Through control on the grinding fineness of raw materials, sintering temperature of a cement clinker, insulation time, cooling system and cement grinding fineness, reasonable control of expansion effect time and expansion size of periclase in the cement clinker is realized, so that the content of MgO is 3.5%-5%, and periclase size is 2-10 mum. Experiments show that the high-magnesium micro-expansive moderate heat Portland cement for water-power engineering has late expansion mainly occurred 28 days after hydration of the cement and has expansion enhancement in 28-180 days of 0.011%-0.020%, and the expansion time basically fits the late temperature drop stage of large-volume concrete in the water-power engineering, so as to effectively compensate for the late thermal shrinkage of concrete in the water-power engineering.
Description
Technical field
The invention belongs to cement in building material technical field and preparation method thereof, be specifically related to high magnesium microdilatancy moderate heat cement and preparation method thereof for a kind of hydroelectric project, particularly relate to a kind of high magnesium microdilatancy moderate heat cement that utilizes its later stage microdilatancy effect prepared by the raw materials such as calcareous raw material, siliceous raw material, ferriferous raw material, aluminum raw material, magnesia raw material and gypsum can effective compensation hydroelectric project later concrete temperature drop to shrink.
Background technology
Water power, as clean reproducible energy, is the emphasis energy that China's power industry is first developed.At present, China is built, in the power station of building and establishing, have hundreds of seats, is century-old Life Design.After the casting of concrete in mass such as water conservancy project dam complete, release due to hydration heat of cement, concrete internal temperature rises rapidly, generally after building, top temperature can reach 30 ℃-50 ℃, after reaching top temperature (generally from 7d concrete placement), along with heat discharges to outside, concrete temperature slow decreasing, even the longer time is just down to equilibrium temperature to go through the several years, along with temperature declines, volume of concrete shrinks, be accompanied by again dry shrinkage and chemical shrinkage, in concrete, produce larger string stress, once string stress surpasses concrete tensile strength, concrete will produce crack, this not only affects the attractive in appearance of concrete structure, more make concrete intensity, weather resistance declines.
Research discovery, very slow through the periclasite hydration of high-temperature calcination, the volumetric expansion causing in generating magnesium hydroxide process occurs lateer.Numerous scientific and technical personnel are according to the feature of mass concrete, through 30 years of researches, MgO concrete technology is proposed, utilize the delayed microswelling characteristic of MgO concrete self, make concrete produce volumetric expansion in temperature drop process, compensation temperature drop shrinks, improve concrete crack resistance, to realize all or most of mass concrete precooling of aggregate of cancelling, mix on the rocks, pre-buried water-cooled tube, traditional temperature control measures such as jointing and blocking, reach high-quality, fast, economy is built the object of mass concrete, therefore, high-magnesia cement obtains the application of research and extension widely.
In cement clinker, MgO exists with solid solution and free two kinds of forms.Wherein, MgO is without expansion for solid solution state, and the MgO(existing with the crystal habit that dissociates also claims periclasite), in slow hydration process, own vol can expand approximately 117%, has later stage micro-expansibility.At present, the high magnesium moderate heat cement on market can not effectively be controlled its periclasite content and size, and therefore, swelling property size and the length of time of expanding that these cement produce are unfettered.
" a kind of low alkali expansive moderate heat silicate cement and production method thereof " (number of patent application: 201110123300.5) of Sichuan Esheng Cement Group Co., Ltd.'s development, its each raw material grinds into fineness 0.08mm and tails over that to be not more than 16.0%(common in raw mill by ratio requirement, cement production enterprise is for reducing grinding cost, controlling each raw material grinding tails over as 10.0%-15.0% to fineness 0.08mm), in moderate heat cement grog, MgO content is 3.0%-5.0%, and to not specified (NS)s such as Cement clinker buring temperature, soaking time, cooling systems.The composition that plays later stage microdilatancy effect in cement is the MgO existing with periclasite form in grog.Raw material grinding fineness, Cement clinker buring temperature, soaking time, cooling system, cement fineness etc. are all the important factors that affects the formation volume of periclasite in cement clinker and form size.
" moderate-heat portland cement grog and production method thereof " (number of patent application: 201210510944.4) of Guangxi Yu Feng cement limited-liability company development, its clinker discharging enters comb formula refrigerant chilling, make temperature be cooled to 150 ℃ from 1100 ℃, speed of cooling is too fast is unfavorable for growing up of periclasite crystal, thereby causes periclasite expansion in moderate heat cement to occur too early.Meanwhile, the factor that this technology does not form swelling property periclasite in the high magnesium moderate heat cements of impact such as raw material grinding fineness, Cement clinker buring temperature, soaking time describes in detail.
" expansive moderate heat silicate cement and production method thereof " (number of patent application: 201210510958.6) of Guangxi Yu Feng cement limited-liability company development, in its cement, MgO content is 3.5%-5.0%, " a kind of method of producing moderate-heat portland cement " (number of patent application: 201010128111.2) of Guizhou Prov. Building Material Science Inst.'s development, " a kind of method of utilizing pair expansive cements to build dam " (number of patent application: 201210100106.X) of Zhejiang University's development, in grog, MgO content is 4.0%-6.0%, these patent applications are not all to raw material grinding fineness, Cement clinker buring temperature, soaking time, the factor that in the high magnesium moderate heat cement of the impacts such as cooling system, swelling property periclasite forms describes in detail.
201210489955.9) and " moderate heat cement temperature-controlled process and equipment " (number of patent application: 201210490140.2) be respectively the control method of moderate heat cement specific surface area and temperature, have nothing to do with preparation and the micro-expansibility thereof of high magnesium moderate heat cement " the specific surface area control method of moderate heat cement " of Guangxi Yu Feng cement limited-liability company development (number of patent application:.
As can be seen here, the high magnesium microdilatancy moderate heat cement can effective compensation hydroelectric project later concrete temperature drop shrinking in the urgent need to a kind of its later stage microdilatancy effect.
Summary of the invention
For overcoming the shortcoming of existing moderate heat cement, solve high magnesium moderate heat cement swelling property size and the free difficult problem in the length of time that expands in the market, realize the object that its later stage microdilatancy effect can effective compensation hydroelectric project later concrete temperature drop be shunk, the invention provides high magnesium microdilatancy moderate heat cement for a kind of hydroelectric project.
For solving the problems of the technologies described above, the present invention takes following technical scheme: high magnesium microdilatancy moderate heat cement for a kind of hydroelectric project, with calcareous raw material, siliceous raw material, ferriferous raw material, aluminum raw material, magnesia raw material and gypsum are raw material, through raw grinding, clinker burning, cement grinding makes, the weight proportion of its Raw is: calcareous raw material 71.09%-75.82%, siliceous raw material 9.54%-9.65%, ferriferous raw material 2.42%-2.56%, aluminum raw material 5.51%-5.91%, the 6.06%-11.41% of magnesia raw material, the weight ratio of cement clinker and gypsum is: 96.5:3.5-94.5:5.5, MgO content in cement clinker (by quality) is 3.5%-5.0%, periclasite is of a size of 2 μ m-10 μ m.
Described calcareous raw material is selected from one or more the combination in Wingdale, calcite, limestone, is preferably Wingdale;
Described siliceous raw material is selected from one or more the combination in silica, shale, sandstone, is preferably silica;
Described ferriferous raw material is selected from one or more the combination in copper mine tailing, iron powder, is preferably copper mine tailing;
Described aluminum raw material is selected from one or more the combination in aluminium mine tailing stone, bauxitic clay, is preferably aluminium mine tailing stone;
Described magnesia raw material is selected from one or more the combination in rhombspar, high magnesium lime stone, is preferably high magnesium lime stone;
Described gypsum is selected from one or more the combination in the plaster of paris, desulfurated plaster, is preferably the plaster of paris.
The most preferably scheme that is combined to form of each preferred feedstock.
The present invention also provides a kind of method of high magnesium microdilatancy moderate heat cement for above-mentioned hydroelectric project of preparing, by raw grinding, clinker burning, three operations of cement grinding, so-called " two mills one burn " makes, in cement clinker, MgO content is 3.5%-5.0%, and periclasite is of a size of 2 μ m-10 μ m.
Specifically, the preparation method of high magnesium microdilatancy moderate heat cement for hydroelectric project provided by the present invention, can comprise following steps:
1) by composition of raw materials, take each raw material, jointly carry out grinding, obtain cement slurry;
2) cement slurry is calcined at a certain temperature, and be suitably incubated, obtain cement clinker;
3) to cement clinker, carry out cooling;
4) by cooled cement clinker and gypsum intergrinding to certain fineness, obtain high magnesium microdilatancy moderate heat cement for hydroelectric project.
In preparation method in above-mentioned hydroelectric project with high magnesium microdilatancy moderate heat cement, in step 1), the grinding fineness of each raw material there are certain requirements: grinding is meticulous, by the raw material grinding cost significantly increasing in cement production process, because cement production process is solid state reaction process, grinding is excessively thick, be unfavorable for the Flashmelt of contained a small amount of MgO in each raw material, and then affect formation and the growth of periclasite crystal.Therefore, in step 1), by each raw material grinding to fineness, be that 0.08mm tails over as 5.0%-10.0%, be preferably 6.0%-8.0%(by quality).
Step 2) calcining temperature in and soaking time should be controlled within the specific limits, and temperature is too low or soaking time is too short, are unfavorable for the formation of cement clinker mineral, are also unfavorable for the growth of periclasite crystal in grog; Excess Temperature or soaking time are long, will significantly increase burning clinker of cement cost, also easily make periclasite crystalline size excessive, greatly delay the hydration reaction time of periclasite in cement clinker.Therefore the calcining temperature, step 2) is controlled at 1350 ℃-1500 ℃, is preferably 1400 ℃-1450 ℃, and soaking time is 30min-90min, is preferably 30min-60min.
The type of cooling in step 3) has very important impact to the formation of (comprising periclasite) of integral cement clinker mineral, formation volume, formation size: speed of cooling is too fast, high temperature modification cement clinker mineral easily crystallizes out, but be unfavorable for growing up of periclasite crystal, and easily make part periclasite crystal be solid-solubilized in other clinker minerals, reduce the periclasite formation volume in cement clinker with microdilatancy effect; Speed of cooling is excessively slow, easily causes high temperature modification cement clinker mineral (such as C
3s) decomposition, meanwhile, also easily makes periclasite crystalline size excessive, greatly delays the hydration reaction time of periclasite in cement clinker.Therefore, the type of cooling in step 3) is rapid cooling, in air, is cooled to suitable.
In step 4), the fineness of cement clinker and gypsum intergrinding should be controlled in specialized range, grinding is meticulous, significantly increase on the one hand cement production process Raw grinding cost, easily make on the other hand periclasite crystalline size diminish in grinding process, cause periclasite hydration reaction time to occur ahead of time; Grinding is excessively thick, affects the whole hydration rate of cement.Therefore, in step 4), cement clinker and gypsum intergrinding to fineness is that 0.08mm tails over as 5.0%-8.0%, is preferably 5.0%-7.0%(by quality).
The most preferred scheme that is combined to form preparation method of the preferred parameter of each step above.
High magnesium microdilatancy moderate heat cement of the present invention can be applicable in hydroelectric project, its late expansion mainly occurred in hydrated cementitious after 28 days, and its expansion of 28 days-180 days is promoted as 0.011%-0.020%, this expansion time and the basic matching of temperature drop stage in hydraulic large-volume concrete later stage, can shrink by effective compensation hydroelectric project later concrete temperature drop.
The invention provides high magnesium microdilatancy moderate heat cement and preparation method thereof for a kind of hydroelectric project.By the control to raw material grinding fineness, Cement clinker buring temperature, soaking time, cooling system, the contour magnesium microdilatancy of cement fineness moderate heat cement preparation process, realize the control to periclasite content and size in cement clinker.After testing, MgO content in high magnesium microdilatancy moderate heat cement grog for hydroelectric project of the present invention (by quality) is 3.5%-5.0%, and periclasite is of a size of 2 μ m-10 μ m.Experiment showed, that hydroelectric project of the present invention has the following advantages with high magnesium microdilatancy moderate heat cement tool:
(1) according to the test method of JC/T313-2009, hydroelectric project of the present invention mainly occurs in hydrated cementitious after 28 days with high magnesium microdilatancy moderate heat cement late expansion, and its expansion of 28 days-180 days is promoted as 0.011%-0.020%, this expansion time and the basic matching of temperature drop stage in hydraulic large-volume concrete later stage, can shrink by effective compensation hydroelectric project later concrete temperature drop.
(2) the present invention has realized the reasonable control of periclasite expansion time and expanded size in high magnesium moderate heat cement, simultaneously also for the reasonable control of periclasite in other type cement provides technical thought.
Below in conjunction with specific embodiment, the present invention is described in further details.
Embodiment
Embodiment implements take technical solution of the present invention under prerequisite, has provided detailed embodiment and concrete operating process, and embodiment will contribute to understand the present invention, but protection scope of the present invention is not limited to following embodiment.
Proportioning raw materials and the preparation of high magnesium microdilatancy moderate heat cement for embodiment 1-8, hydroelectric project
Hydroelectric project by the raw material weight proportioning of high magnesium microdilatancy moderate heat cement is: calcareous raw material 71.09%-75.82%, siliceous raw material 9.54%-9.65%, ferriferous raw material 2.42%-2.56%, aluminum raw material 5.51%-5.91%, the 6.06%-11.41% of magnesia raw material, the weight ratio of cement clinker and gypsum is: 96.5:3.5-94.5:5.5, wherein
Calcareous raw material is selected from one or more the combination in Wingdale, calcite, limestone, is preferably Wingdale;
Siliceous raw material is selected from one or more the combination in silica, shale, sandstone, is preferably silica;
Ferriferous raw material is selected from one or more the combination in copper mine tailing, iron powder, is preferably copper mine tailing;
Aluminum raw material is selected from one or more the combination in aluminium mine tailing stone, bauxitic clay, is preferably aluminium mine tailing stone;
Magnesia raw material is selected from one or more the combination in rhombspar, high magnesium lime stone, is preferably high magnesium lime stone;
Gypsum is selected from one or more the combination in the plaster of paris, desulfurated plaster, is preferably the plaster of paris.
Each raw material is commercially available material above.
The chemical composition analysis of each raw material is as shown in table 1:
The chemical composition analysis of each raw material of table 1 (quality percentage composition %)
" Loss " represents loss on ignition;
" ∑ " represents the summation of several the chemical compositions in prostatitis, and the surplus of less than 100% is a small amount of alkaline matter or other impurity in raw material.
Embodiment 1-8 hydroelectric project is as shown in table 2 with proportioning raw materials (quality percentage composition) and preparation technology's the significant parameter of high magnesium microdilatancy moderate heat cement, and the first five kind raw materials quality percentage composition sum of tabular is 100%.
High each proportioning raw materials of magnesium microdilatancy moderate heat cement and preparation technology's important parameter for table 2 hydroelectric project
Hydroelectric project of the present invention is by raw grinding, clinker burning, three operations of cement grinding with high magnesium microdilatancy moderate heat cement, and so-called " two mills one burn " makes, and specifically, its preparation method comprises following steps:
1) by composition of raw materials, take each raw material, raw material intergrinding to fineness is that 0.08mm tails over as 5.0%-10.0%, is preferably 6.0%-8.0%, obtains cement slurry;
2) cement slurry is calcined, calcining temperature is controlled at 1350 ℃-1500 ℃, is preferably 1400 ℃-1450 ℃, and is suitably incubated, and soaking time is 30min-90min, is preferably 30min-60min, obtains cement clinker;
3) cement clinker is carried out cooling, the type of cooling is rapid cooling, in air, is cooled to suitable;
4) by cooled cement clinker and gypsum intergrinding to fineness, be that 0.08mm tails over as 5.0%-8.0%, be preferably 5.0%-7.0%, obtain high magnesium microdilatancy moderate heat cement for hydroelectric project.
The hydroelectric project that embodiment 5 and routine 9-10 different technical parameters prepare is listed in table 3 with high magnesium microdilatancy moderate heat cement.
Table 3 contrast high magnesium microdilatancy moderate heat cement proportioning raw materials (quality percentage composition) and preparation technology's important parameter
Note: rapid cooling is cooling in air; Slow cooling be in kiln or stove in naturally cooling; Chilling is cooled with liquid nitrogen.
The performance of high magnesium microdilatancy moderate heat cement for test example, detection hydroelectric project of the present invention
The hydroelectric project of according to the requirement of the requirement of GB200-2003 < < moderate-heat portland cement low-heat portland cement low heat portland blast-furnace-slag cement > > and JC/T313-2009 < < expansive cement swelling rate test method > > being prepared by embodiment 1-8 is respectively carried out strength of cement mortar, hydration heat and expansion performance experiment with high magnesium microdilatancy moderate heat cement, and 42.5 moderate heat cements and the routine 9-12 that Sichuan Esheng Cement Group Co., Ltd. produces of simultaneously take is contrast.
Result is as shown in table 4, and 42.5 moderate heat cements (contrast) that hydroelectric project of the present invention is produced with Sichuan Esheng Cement Group Co., Ltd. by 28 days ultimate compression strength of high magnesium microdilatancy moderate heat cement and hydration heat performance quite.Hydroelectric project of the present invention mainly occurs in hydrated cementitious after 28 days with high magnesium microdilatancy moderate heat cement late expansion, and its expansion of 28 days-180 days is promoted as 0.011%-0.020%, this expansion time and the basic matching of temperature drop stage in hydraulic large-volume concrete later stage, can shrink by effective compensation hydroelectric project later concrete temperature drop; And 42.5 moderate heat cements that Sichuan Esheng Cement Group Co., Ltd. produces, it is only 0.006% that the expansion of 28 days-180 days is promoted, being not enough to compensation water electrical engineering later concrete temperature drop shrinks, its later stage mainly expands and may after 180 days, produce, and is later than the later stage temperature drop time range of hydraulic large-volume concrete.
The grog of reference examples 9 preparations is because efflorescence is more serious, and gelling is poor, is difficult to moulding, therefore cannot measure corresponding cement performance; High magnesium moderate heat cement prepared by reference examples 10-11 expands larger for 28 days, and the expansion of 28 days-180 days is promoted less, is only 0.008%; The high magnesium moderate heat cement of reference examples 12 preparations, the expansion of 28 days-180 days increases also less, is only 0.005%, and high magnesium moderate heat cement prepared by these reference examples is all not enough to compensation water electrical engineering later concrete temperature drop and shrinks.
The high magnesium microdilatancy of table 4 the present invention moderate heat cement and the expansion character detected result that contrasts moderate heat cement
Hydroelectric project of the present invention is 3.5%-5.0% with MgO content in high magnesium microdilatancy moderate heat cement grog, and 42.5 moderate heat cements (MgO content is 4.42%) of producing with Sichuan Esheng Cement Group Co., Ltd., for contrasting, carry out petrographic analysis.Analytical results shows, in cement clinker of the present invention, periclasite crystalline size is 2 μ m-10 μ m, and in the 42.5 moderate heat cement grogs that Sichuan Esheng Cement Group Co., Ltd. produces, periclasite crystalline size is 12 μ m-15 μ m.
The present invention studies and shows, the composition that plays later stage microdilatancy effect in cement is the MgO existing with periclasite form in grog, and in cement, the size of periclasite micro-expansibility and action time and its content and size are closely related.In cement, MgO content is too low, mainly with solid solution form, exists, and does not have microdilatancy effect; MgO too high levels, easily causes that soundness is bad.Periclasite is undersized, and the expansion time is too early; Periclasite is oversize, and microdilatancy is excessively slow action time, is unfavorable for that the temperature drop that compensates mass concrete shrinks.Therefore, control periclasite content and periclasite size in cement, significant for rationally utilizing in cement the micro-expansibility of periclasite.Owing to there is no at present the method for periclasite content in accurate quantitative analysis cement both at home and abroad, therefore, custom is carried out the content of periclasite in qualitative description cement with MgO content in cement.It is 3.5%-5.0% with MgO content in high magnesium microdilatancy moderate heat cement grog that the present invention controls hydroelectric project, and periclasite size is more appropriate at 2 μ m-10 μ m.
On the other hand, raw material grinding fineness, Cement clinker buring temperature, soaking time, cooling system, cement fineness etc. are all the important factors that affects the formation volume of periclasite in cement clinker and form size, co-controlling the formation volume of periclasite in cement clinker and is formed size, and these are most important for controlling high magnesium moderate heat cement swelling property action time and effect size.The present invention, by the processing parameter of accurate control " two mills one burn ", makes the hydroelectric project making be controlled by formation volume and the formation size of periclasite in high magnesium microdilatancy moderate heat cement grog, can shrink by effective compensation hydroelectric project later concrete temperature drop.
Claims (10)
1. a high magnesium microdilatancy moderate heat cement for hydroelectric project, to take calcareous raw material, siliceous raw material, ferriferous raw material, raw material, magnesia raw material and gypsum as raw material, through raw grinding, clinker burning, cement grinding, make, it is characterized in that: in cement clinker, MgO content is 3.5%-5.0%(mass percent), and periclasite is of a size of 2 μ m-10 μ m.
2. high magnesium microdilatancy moderate heat cement for hydroelectric project according to claim 1, it is characterized in that: the weight proportion of each raw material is: calcareous raw material 71.09%-75.82%, siliceous raw material 9.54%-9.65%, ferriferous raw material 2.42%-2.56%, aluminum raw material 5.51%-5.91%, the 6.06%-11.41% of magnesia raw material, the weight ratio of cement clinker and gypsum is: 96.5:3.5-94.5:5.5.
3. high magnesium microdilatancy moderate heat cement for hydroelectric project according to claim 1 and 2, is characterized in that:
Described calcareous raw material is selected from one or more the combination in Wingdale, calcite, limestone, is preferably Wingdale;
Described siliceous raw material is selected from one or more the combination in silica, shale, sandstone, is preferably silica;
Described ferriferous raw material is selected from one or more the combination in copper mine tailing, iron powder, is preferably copper mine tailing;
Described aluminum raw material is selected from one or more the combination in aluminium mine tailing stone, bauxitic clay, is preferably aluminium mine tailing stone;
Described magnesia raw material is selected from one or more the combination in rhombspar, high magnesium lime stone, is preferably high magnesium lime stone;
Described gypsum is selected from one or more the combination in the plaster of paris, desulfurated plaster, is preferably the plaster of paris;
And the preferred assembled scheme of each raw material is preferred feedstock combination.
4. prepare described in claim 1 or 2 or 3 method for high magnesium microdilatancy moderate heat cement for hydroelectric project, by raw grinding, clinker burning, three operations of cement grinding, so-called " two mills one burn ", makes high magnesium microdilatancy moderate heat cement for hydroelectric project.
5. preparation method according to claim 4, is characterized in that: comprise following steps:
1) by composition of raw materials, take each raw material, jointly carry out grinding, obtain cement slurry;
2) cement slurry is calcined at a certain temperature, and be suitably incubated, obtain cement clinker;
3) to cement clinker, carry out cooling;
4) by cooled cement clinker and gypsum intergrinding to certain fineness, obtain high magnesium microdilatancy moderate heat cement for hydroelectric project.
6. preparation method according to claim 5, is characterized in that: in step 1), by each raw material grinding to fineness, be 0.08mm tails over as 5.0%-10.0%, and preferred 6.0%-8.0%.
7. according to the preparation method described in claim 5 or 6, it is characterized in that: step 2) in calcining temperature be controlled at 1350 ℃-1500 ℃, be preferably 1400 ℃-1450 ℃, soaking time is 30min-90min, is preferably 30min-60min; Step 2) preferably at 1400 ℃-1450 ℃ insulation calcining 30min-60min.
8. according to the preparation method described in claim 5 or 6 or 7, it is characterized in that: the type of cooling in step 3) is rapid cooling, cooling in air.
9. according to the arbitrary described preparation method of claim 5 to 8, it is characterized in that: in step 4), cement clinker and gypsum intergrinding to fineness is that 0.08mm tails over as 5.0%-8.0%, preferably 5.0%-7.0%.
10. the application of the high magnesium microdilatancy moderate heat cement described in claim 1 or 2 or 3 in hydroelectric project, this high magnesium microdilatancy moderate heat cement expands after 28 days at hydrated cementitious, and the expansion of 28 days-180 days is promoted as 0.011%-0.020%.
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| CN104926257A (en) * | 2015-06-18 | 2015-09-23 | 葛洲坝集团水泥有限公司 | Anti-fracture seepage-proofing cement and preparation method thereof |
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| CN105439481A (en) * | 2015-11-16 | 2016-03-30 | 中国建筑材料科学研究总院 | Method for increasing content of periclase in high-magnesium moderate-heat cement clinker |
| CN106630704A (en) * | 2017-01-04 | 2017-05-10 | 济南大学 | Belite-calcium sulphoaluminate cement clinker and preparation method thereof |
| CN113045276A (en) * | 2021-04-09 | 2021-06-29 | 四川铁创科技有限公司 | Concrete for heat damage tunnel |
| CN113060950A (en) * | 2021-04-09 | 2021-07-02 | 嘉华特种水泥股份有限公司 | Anti-cracking self-repairing cement |
| CN113435044A (en) * | 2021-06-28 | 2021-09-24 | 中国建筑材料科学研究总院有限公司 | Method for quantitatively regulating and controlling size of periclase in cement clinker |
| CN114276084A (en) * | 2021-12-27 | 2022-04-05 | 江苏泰林建设有限公司 | Heat-insulating ceramsite wallboard |
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| CN104926257A (en) * | 2015-06-18 | 2015-09-23 | 葛洲坝集团水泥有限公司 | Anti-fracture seepage-proofing cement and preparation method thereof |
| CN104926257B (en) * | 2015-06-18 | 2017-07-25 | 中国葛洲坝集团水泥有限公司 | A kind of anti-crack and anti-seepage cement and preparation method thereof |
| CN105439481A (en) * | 2015-11-16 | 2016-03-30 | 中国建筑材料科学研究总院 | Method for increasing content of periclase in high-magnesium moderate-heat cement clinker |
| CN105366966A (en) * | 2015-11-24 | 2016-03-02 | 中国建筑材料科学研究总院 | High-magnesium micro-expansion cement and preparation method thereof |
| CN106630704A (en) * | 2017-01-04 | 2017-05-10 | 济南大学 | Belite-calcium sulphoaluminate cement clinker and preparation method thereof |
| CN113045276A (en) * | 2021-04-09 | 2021-06-29 | 四川铁创科技有限公司 | Concrete for heat damage tunnel |
| CN113060950A (en) * | 2021-04-09 | 2021-07-02 | 嘉华特种水泥股份有限公司 | Anti-cracking self-repairing cement |
| CN113045276B (en) * | 2021-04-09 | 2022-12-16 | 四川铁拓科技有限公司 | Concrete for heat damage tunnel |
| CN113435044A (en) * | 2021-06-28 | 2021-09-24 | 中国建筑材料科学研究总院有限公司 | Method for quantitatively regulating and controlling size of periclase in cement clinker |
| CN114276084A (en) * | 2021-12-27 | 2022-04-05 | 江苏泰林建设有限公司 | Heat-insulating ceramsite wallboard |
| CN114276084B (en) * | 2021-12-27 | 2022-11-08 | 江苏泰林建设有限公司 | Heat-insulating ceramsite wallboard |
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