CN104529323A - Full-weight slag aggregate heat-resistant concrete prepared by using ordinary silicate cement - Google Patents
Full-weight slag aggregate heat-resistant concrete prepared by using ordinary silicate cement Download PDFInfo
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- CN104529323A CN104529323A CN201410744411.1A CN201410744411A CN104529323A CN 104529323 A CN104529323 A CN 104529323A CN 201410744411 A CN201410744411 A CN 201410744411A CN 104529323 A CN104529323 A CN 104529323A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The present invention relates to a fire-resistant material, particularly to a full-weight slag aggregate heat-resistant concrete prepared by using ordinary silicate cement. The full-weight slag aggregate heat-resistant concrete comprises, by weight, 40-80% of a blast furnace heavy slag aggregate, 10-20% of ordinary silicate cement, 10-20% of slag micro-powder, 0-10% of fly ash, and 0-10% of silica micro-powder, wherein 0.01-0.03% of sodium tripolyphosphate and 0.01-0.03% of sodium metaphosphate are added to the raw materials. According to the present invention, the metallurgical solid waste blast furnace heavy slag is adopted to replace the fire-resistant material to prepare the fire-resistant aggregate, the cementitious material adopts the metallurgical solid waste materials such as the slag powder and the fly ash, and the binding agent uses the ordinary silicate cement with no high temperature resistance, such that the existing metallurgical slag resources are completely utilized to form the silicate and aluminate high temperature resistance hydrate during the cement hydration process so as to reduce the generation of the hydroxide unstable substance, enrich the source of the heat-resistant concrete raw materials, and reduce the cost of the heat-resistant concrete.
Description
Technical field
The present invention relates to a kind of refractory materials, especially relate to the heat resistance concrete that full weight slag aggregate prepared by a kind of ordinary Portland cement.
Background technology
The composition material of general heat resistance concrete comprises refractory aggregate (coarse aggregate and fine aggregate), refractory powder, adulterant, bonding agent etc., wherein main fireproof raw material aggregate is generally still with the fireproof raw material of stable performance, its thermal stability all can reach more than 1200 DEG C, for the production of the heat resistance concrete below 700 DEG C, not only serious waste refractory materials Resources, cause wasting one's talent on a petty job simultaneously, lose more than gain, before the present invention makes, existing heat resistance concrete engineering, it is all the coarse-fine aggregate making heat resistance concrete traditionally of refractory materials, recycling high temperature resistant cement-high-alumina cement and water form by quantitatively coordinating, but because refractory raw material will through adopting ore processing, transport, calcining forms, its cost all comparatively heavy blast furnace slag wants high.
relevant comparative's data
1, compound heavy blast furnace slag heat resistance concrete and performance thereof
The document is used for 700 heat resistance concretes, its bonding agent slag cement, heavy blast furnace slag is that Anshan iron and steel plant produces, its critical granularity is different from the present invention, only have 5mm, critical granularity is less, and relative heat-resistant stability is higher, but cause its normal temperature strength to be 22-33.6MPa, and the residual strength index of 700 DEG C is also at 50-66%.And the thermal stability of the heavy blast furnace slag heat resistance concrete mentioned in the document can reach 700-1200 DEG C is impossible, because heavy blast furnace slag is that the waste residue that produces in the process of blast-furnace smelting molten iron is on molten iron, the temperature range of its manUfaCtUre of pig iron is 1200-1300 DEG C, illustrate that heavy blast furnace slag is liquid form at 1200 DEG C, can not have the intensity of so-called aggregate, it is infeasible for reaching less than 1200 DEG C for thermal stability.
2, the test of slag aggregate concrete thermotolerance
The document is used for the heat resistance concrete of less than 700 DEG C, and bonding agent is also that utilization can resistant to elevated temperatures slag cement, and gathering materials, what select is horse steel blast-furnace slag, and its baked strength is 31.4-33.8MPa, and 700 DEG C of residual strengths are 11.4-17.8MPa.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of heat resistance concrete, this heat resistance concrete all adopts Baogang's metallurgical solid waste, reduce production cost, reduce Resources exploitation, decrease heavy blast furnace slag simultaneously and store up occupation of land problem in a large number in Baogang, decrease problem of environmental pollution, the ordinary portland cement also utilizing other solid slags to solve non-refractory in addition makees the bonding agent of heat resistance concrete; Obtained product physical index is volume density 110 ± 5 DEG C, and 24h is 2.65-2.72g/cm
3, after normal temperature maintenance in 7 days, drying compressive strength in 110 DEG C is 42.8-59MPa, 700 DEG C, insulation 3h, and its residual strength after high temperature reaches 24.8-38MPa, accounts for the 53-68% that normal temperature dries compressive strength; Or 600 DEG C, insulation 3h, its residual strength after high temperature reaches 27.4-40MPa, and account for the 59-72% that normal temperature dries compressive strength, Linear change rate is between ± 1%.
The problem that the present invention is the above-mentioned proposition of solution is adopted solution to be:
A heat resistance concrete for full weight slag aggregate prepared by ordinary Portland cement, and its characteristic is, comprises the component of following weight percent:
Heavy blast furnace slag aggregate: 40-80%; Ordinary Portland cement: 10-20%; Slag micropowder: 10-20%; Flyash: 0-10%; Fine silica powder: 0-10%; Then percentage adds tripoly phosphate sodium STPP more by weight: 0.01-0.03%; Sodium-metaphosphate: 0.01-0.03%.
Heavy blast furnace slag of the present invention should have stable structure, as there is no the generation of lime, silicate and iron decomposing phenomenon, also requires that it is nature Slow cooling, sort out foamy slag wherein, impurity, the heavy blast furnace slag after magnetic separation simultaneously.
Slag micropowder requires the S75 level index of conformance with standard GB/T18046-2008 " GBFS in cement and concrete ".
Flyash requires below the secondary of conformance with standard GB/T1496-2005 " flyash in cement and concrete ", and its loss on ignition is not more than 5%.
SF85 rank in fine silica powder conformance with standard GB/T21236-2007 " electric furnace recovery fine silica powder ".
P.O42.5 rank in ordinary Portland cement conformance with standard GB175-2007 " general purpose portland cement ".
Further:
describedin heavy blast furnace slag aggregate, CaO content wherein must not be greater than 45%, and critical grain size must not be greater than 20mm, and its aggregate strength-crush values is not more than 16%.
Further: by above-mentioned raw materials component index on request, the aggregate of heavy blast furnace slag grating and slag micropowder, flyash, after the powders mixture of fine silica powder mixes by the part by weight of 6-7:3-4, ordinary Portland cement bonding agent is added again in the ratio of the 10-16% of raw material gross weight, and fully mix, add water again before using and stir, because the voidage of heavy blast furnace slag is large compared with refractory materials, it easily absorbs water, in order to ensure that concrete serviceability meets service requirements, need proper extension churning time, on the one hand in order to ensure concrete uniformity, prevent mushy dry slag concrete from producing on the other hand and return water phenomenon, affect the embodiment of its later stage performance.
It is volume density 110 ± 5 DEG C that the present invention obtains product physical index, and 24h is 2.65-2.72g/cm
3, after normal temperature maintenance in 7 days, drying compressive strength in 110 DEG C is 42.8-59MPa, 700 DEG C, insulation 3h, and its residual strength after high temperature reaches 24.8-38MPa, accounts for the 53-68% that normal temperature dries compressive strength; Or 600 DEG C, insulation 3h, its residual strength after high temperature reaches 27.4-40MPa, and account for the 59-72% that normal temperature dries compressive strength, Linear change rate is between ± 1%.
The present invention compared with prior art feature is: slag aggregate of the prior art is that Anshan iron and steel plant etc. produces slag, bonding agent be slag class high temperature resistant cement, and the present invention utilizes Baogang BF dry slag to do to gather materials, utilize the ordinary portland cement of non-refractory and active good and make adulterant to be mixed with high temperature resistant agglutination material with the metallurgical solid waste that cement can form high temperature resistant ore deposit phase, reach high temperature resistant, effect that intensity is high, its normal temperature strength of heat resistance concrete of its development simultaneously and the residual strength after high temperature are all than the height of pertinent literature.
Physical properties index of the present invention is all high than the desired value of current standards a lot, is a kind of Novel furnace material with popularity use value.The present invention selects materials easily, and proportioning is reasonable, and preparation technology is relatively simple, significantly can reduce material cost, is a rare novel material, new technology, frontier.Turn waste into wealth, produce high value added product for widespread use solid waste and provide wide Utilization prospects.The present invention is applicable to need in national economy in each field with the corresponding construction work of heat resistance concrete material.
The present invention be directed to the above-mentioned shortcoming of existing heat resistance concrete aggregate, main raw material(s)-the refractory aggregate of heat resistance concrete is replaced, and smelt with Baogang BF the properties requirement that the waste residue heavy blast furnace slag produced just in time meets the heat resistance concrete of less than 700 DEG C, and larger economic and social benefits can be produced, compared with prior art, advantage of the present invention is: all utilize metallurgical solid waste State of Blast Furnace dry slag to substitute refractory materials and do refractory aggregate, and its gelling material all adopts the metallurgical solid waste material such as slag powders and flyash powder, the ordinary Portland cement of bonding agent non-refractory, take full advantage of existing metallurgical slag resource, the high-temperature resistant water compound of silicate and aluminate etc. is formed in cement hydration process, decrease the generation of the unstable earnest such as oxyhydroxide, enrich the source of heat resistance concrete raw material, reduce the cost of heat resistance concrete, solve the difficult problem that dry slag difficulty utilizes, for the utilization of dry slag opens new way.
First the present invention is the aggregate that the solid waste heavy blast furnace slag all utilizing Baogang to produce first does heat resistance concrete; They are two years old, it is the ordinary portland cement utilizing non-refractory, the metallurgical solid waste that admixture enters a certain amount of different minerals composition makes it that corresponding reaction occur in the hydration process of cement, produces resistant to elevated temperatures mineral structure to improve the non-refractory of its ordinary portland cement, changes its mineral composition; They are three years old, waste residue-the heavy blast furnace slag utilizing blast-furnace smelting to produce, substitute the non-refractory of sandstone, the refractory materials that simultaneously alternative materials cost is high, produces low-cost and high-performance, high added value, but also solves to take and a large amount of store up place, contaminate environment, do not reach utility value and the utilizing status of application, make the bits stored up effectively utilize better, Baogang's metallurgical solid waste is reached " zero release " early.
Embodiment
Illustrated according to embodiment below.
Embodiment 1:
Aggregate is chosen:
Choose calcium oxide content 38%, there is the rational heavy blast furnace slag coarse-fine aggregate of grating that stable structure and intensity-crush values are 13.8%.Wherein the 39kg of particle diameter 5-20mm, particle diameter are the 26kg of 0-5mm.
Choosing of powder:
Adulterant by conformance with standard requires: slag micropowder, flyash and fine silica powder are prepared burden by the weight ratio of 2.4:1.5:0.4, and carry out premix to even.
The preparation of compound:
Be that the 26kg of 0-5mm first adds in stirrer and carries out pre-mixing to evenly by the 39kg of the particle diameter 5-20mm got ready, particle diameter, add 18kg cement again and 17kg adulterant is mixed, then tripoly phosphate sodium STPP and each 14g of sodium-metaphosphate and water 16kg is added, stir 2-3 minute, till mixing, and do not produce excreting water phenomenon.
It is volume density 110 ± 5 DEG C that the present invention obtains product physical index, and 24h is 2.68g/cm
3, after normal temperature maintenance in 7 days, drying compressive strength in 110 DEG C is 46.4MPa, 700 DEG C, insulation 3h, and its residual strength after high temperature reaches 27MPa, accounts for 58% of normal temperature oven dry compressive strength; Or 600 DEG C, insulation 3h, its residual strength after high temperature reaches 28.8MPa, and account for 62% of normal temperature oven dry compressive strength, Linear change rate is 0.8%.
Embodiment 2:
Aggregate is chosen:
Choose calcium oxide content 42%, have the rational heavy blast furnace slag coarse-fine aggregate of grating that stable structure and intensity-crush values are not more than 12%, wherein the 39kg of particle diameter 5-20mm, particle diameter are the 26kg of 0-5mm.
Choosing of powder:
The flyash, slag micropowder and the fine silica powder that conformance with standard are required are prepared burden by the weight ratio of 2.6:1.3:0.6, and carry out premix to even.
The preparation of compound:
Be that the 26kg of 0-5mm first adds in stirrer and carries out pre-mixing to evenly by the 39kg of the particle diameter 5-20mm got ready, particle diameter, add 15kg cement again and 20kg adulterant is mixed, then tripoly phosphate sodium STPP and each 14g of sodium-metaphosphate and water 16kg is added, stir 2-3 minute, till mixing, and do not produce excreting water phenomenon.
It is volume density 110 ± 5 DEG C that the present invention obtains product physical index, and 24h is 2.66g/cm
3, after normal temperature maintenance in 7 days, drying compressive strength in 110 DEG C is 45MPa, 700 DEG C, insulation 3h, and its residual strength after high temperature reaches 28.3MPa, accounts for 63% of normal temperature oven dry compressive strength; Or 600 DEG C, insulation 3h, its residual strength after high temperature reaches 29.3MPa, and account for 65% of normal temperature oven dry compressive strength, Linear change rate is 0.5%.
Embodiment 3:
Aggregate is chosen:
Choose calcium oxide content 36%, have the rational heavy blast furnace slag coarse-fine aggregate of grating that stable structure and intensity-crush values are not more than 11.4%, wherein the 40.6kg of particle diameter 5-20mm, particle diameter are the 29.4kg of 0-5mm.
Choosing of powder:
The flyash, slag micropowder and the fine silica powder that conformance with standard are required are prepared burden by the weight ratio of 2.2:1.0:0.3, and carry out premix to even.
The preparation of compound:
Be that the 29.4kg of 0-5mm first adds in stirrer and carries out pre-mixing to evenly by the 40.6kg of the particle diameter 5-20mm got ready, particle diameter, add 12kg cement again and 18kg adulterant is mixed, then tripoly phosphate sodium STPP and each 14g of sodium-metaphosphate and water 16kg is added, stir 2-3 minute, till mixing, and do not produce excreting water phenomenon.
It is volume density 110 ± 5 DEG C that the present invention obtains product physical index, and 24h is 2.66g/cm
3, after normal temperature maintenance in 7 days, drying compressive strength in 110 DEG C is 58.4MPa, 700 DEG C, insulation 3h, and its residual strength after high temperature reaches 37.7MPa, accounts for 65% of normal temperature oven dry compressive strength; Or 600 DEG C, insulation 3h, its residual strength after high temperature reaches 39.7MPa, and account for 68% of normal temperature oven dry compressive strength, Linear change rate is 0.1%.
Claims (5)
1. prepare a heat resistance concrete for full weight slag aggregate with ordinary Portland cement, its characteristic is, comprises the component of following weight percent:
Heavy blast furnace slag aggregate: 40-80%; Ordinary Portland cement: 10-20%; Slag micropowder: 10-20%; Flyash: 0-10%; Fine silica powder: 0-10%; Then in above-mentioned raw materials, tripoly phosphate sodium STPP is added again: 0.01-0.03%, sodium-metaphosphate: 0.01-0.03%.
2. the heat resistance concrete of full weight slag aggregate prepared by a kind of ordinary Portland cement according to claim 1, its characteristic is, in described heavy blast furnace slag aggregate, CaO content must not be greater than 45%, and critical grain size must not be greater than 20mm, and its aggregate strength-crush values is not more than 16%.
3. the heat resistance concrete of full weight slag aggregate prepared by a kind of ordinary Portland cement according to claim 1, its characteristic is, by above-mentioned raw materials component index on request, the aggregate of heavy blast furnace slag grating and ordinary Portland cement, slag micropowder, flyash, the powders mixture of fine silica powder mixes by the part by weight of 6-7:3-4, the ordinary Portland cement bonding agent wherein added accounts for the ratio of the 10-16% of raw material gross weight, till fully mixing, obtained product physical index is volume density 110 ± 5 DEG C, 24h is 2.65-2.72g/cm
3, after normal temperature maintenance in 7 days, drying compressive strength in 110 DEG C is 42.8-59MPa, 700 DEG C, insulation 3h, and its residual strength after high temperature reaches 24.8-38MPa, accounts for the 53-68% that normal temperature dries compressive strength, or 600 DEG C, insulation 3h, its residual strength after high temperature reaches 27.4-40MPa, and account for the 59-72% that normal temperature dries compressive strength, Linear change rate is between ± 1%.
4. the heat resistance concrete of full weight slag aggregate prepared by a kind of ordinary Portland cement according to claim 1, and its characteristic is, adulterant by weight: slag micropowder, flyash, fine silica powder are 2-4:1-2:0.1-1.
5. the heat resistance concrete of full weight slag aggregate prepared by a kind of ordinary Portland cement according to claim 1, and its characteristic is, adulterant by weight: slag micropowder, flyash, fine silica powder are 2.2-2.6:1-1.3:0.3-0.6.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105330239A (en) * | 2015-12-15 | 2016-02-17 | 苏州万盛混凝土有限公司 | Preparing method for heat-resisting modified concrete |
| CN106116310A (en) * | 2016-06-29 | 2016-11-16 | 中国三冶集团有限公司 | A kind of containing slag powders with the thermal insulation mortar of polypropylene fibre |
| CN106145816A (en) * | 2016-06-29 | 2016-11-23 | 中国三冶集团有限公司 | A kind of high water proof fire retardant thermal insulation mortar containing slag powders |
| CN109553343A (en) * | 2018-11-27 | 2019-04-02 | 长江大学 | A kind of refractory concrete material and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105330239A (en) * | 2015-12-15 | 2016-02-17 | 苏州万盛混凝土有限公司 | Preparing method for heat-resisting modified concrete |
| CN106116310A (en) * | 2016-06-29 | 2016-11-16 | 中国三冶集团有限公司 | A kind of containing slag powders with the thermal insulation mortar of polypropylene fibre |
| CN106145816A (en) * | 2016-06-29 | 2016-11-23 | 中国三冶集团有限公司 | A kind of high water proof fire retardant thermal insulation mortar containing slag powders |
| CN109553343A (en) * | 2018-11-27 | 2019-04-02 | 长江大学 | A kind of refractory concrete material and preparation method thereof |
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