CN103553399A - Composite mineral admixtures for cement and concrete - Google Patents
Composite mineral admixtures for cement and concrete Download PDFInfo
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- CN103553399A CN103553399A CN201310550704.1A CN201310550704A CN103553399A CN 103553399 A CN103553399 A CN 103553399A CN 201310550704 A CN201310550704 A CN 201310550704A CN 103553399 A CN103553399 A CN 103553399A
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- dry slag
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Abstract
The invention relates to composite mineral admixtures for cement and concrete. The composite mineral admixtures comprise furnace-bottom dry residue and marble powder, the weight parts of the furnace-bottom dry residue and the marble powder are as follows: 2 parts of furnace-bottom dry residue, 0 to 1 part of marble powder, and the specific surface area is 450m<2>/kg to 550m<2>/kg. The preparation method comprises the following steps of mixing the furnace-bottom dry residue and the dried marble powder according to the weight parts, and pulverizing the mixture until the specific surface area is 450m<2>/kg to 550m<2>/kg. The application is characterized in that after being doped with cement, the admixtures account for 20 to 30 percent of the gross weight, or the admixtures account for 20 to 30 percent of the gross weight of cement and composite mineral admixtures after the composite mineral admixtures are doped with a concrete gelling material. The waste marble powder and the furnace-bottom dry residue can be adequately utilized, and the cost is saved.
Description
Technical field
The present invention relates to the adulterant for cement and concrete, particularly a kind of complex mineral blending material.
Background technology
Along with the fast development of Concrete Science And Technology, concrete premixing degree is more and more higher, to the requirement of concrete single performance towards high-performance future development.How to change concrete and the requirement of its performance has been become to an important topic of research concrete technology to meet different engineerings.Mineral admixture, due to its good characteristic, has become requisite component in modern concrete.The kind of adulterant is more at present, and its characteristic also there are differences, and at the concrete aspect of performance of improvement, rises to such an extent that effect is also different.How different adulterants is carried out to autotelic combination according to its performance, to adulterant, in cement and concrete, rationally effectively utilize significant.
In Fujian Province, there is the situation that supply falls short of demand in the flyash that coal-burning power plant discharges always, and the comprehensive utilization of the furnace-bottom dry slag of 20% left and right of institute's ash discharge slag is not still subject to due attention.Furnace-bottom dry slag has good volcanic ash, if its quality of optimization that the furnace-bottom dry slag of Neng Jiang power plant is levigate, will further excite its volcanic ash, reduce water demand ratio, not only can solve its storage and take up an area and other environmental problem, also can bring obvious economic benefit.
Have the Nan'an, Quanzhou of " township of Chinese stone material " title as the marble production collecting and distributing centre of largest domestic, more than 200 ten thousand tons of the discarded marble flours producing because of processing marble material two every year.These discarded marble flours are because can not get effective comprehensive utilization, so that a large amount of landfill, have caused the significant wastage of the hardening of soil, sclerosis and resource, larger to local environmental influence, the development of restriction processing of stone industry.But the specific surface area of marble flour is larger, adds and in cement cementitious material, there is good filling effect, active effect and acceleration effect.
Summary of the invention
For furnace-bottom dry slag and waste marble powder are utilized fully, the present invention will discard marble flour and furnace-bottom dry slag is composite, make full use of the defect that discarded marble flour filling effect, active effect and acceleration effect make up furnace-bottom dry slag, and can better carry out waste reside comprehensive utilization again, save cost.
The technical solution used in the present invention is:
For a complex mineral blending material for cement and concrete, comprise dry slag and marble flour at the bottom of ore deposit, parts by weight are:
2 parts of furnace-bottom dry slags, marble flour 0-1 part, its specific surface area is 450-550m
2/ kg.Preparation method is that the dry marble flour by furnace-bottom dry slag and after drying mixes by described parts by weight, and being crushed to specific surface area is 450-550m
2/ kg.Usage is to it is characterized in that it accounts for the 20-30% of gross weight or in concrete gel material, accounts for cement and the 20-30% of complex mineral blending material weight in cement after admixture.
Wherein the source of marble flour can be that discarded marble flour is levigate forms, can be from the discarded marble flour after the processing of stone field.
The invention has the advantages that compound system that described complex mineral blending material and cement or concrete form through time rate of loss low than the system of furnace-bottom dry slag and cement, and the rheological of slurry is good, early strength is higher.In cement or concrete compound system, admixture furnace-bottom dry slag and discarded marble flour, make full use of industrial waste, provide cost savings.
Ratio by weight furnace-bottom dry slag: cement=1:4 is admixed, and the compound system after mixing is again carried out to performance measurement (cement model used is ordinary Portland cement 52.5), and experimental raw, condition and result are as shown in table 1.Result shows that by furnace-bottom dry slag grinding to specific surface area be 488 m
2during/kg, can make levigate furnace-bottom dry slag reach the quality standard of water demand ratio≤105% of II level flyash, and consumptive use of water normal consistence is also lower.
Table 1
Note: (1) consumptive use of water normal consistence, the measuring method of time of coagulation are according to GB/T1346-2011 < < cement normal consistency, time of coagulation, stability method of inspection > >
(2) specific surface area is according to GB/T8074-2008 < < Method of determination for specific surface of cement (Bo Shi method) > >
(3) water demand ratio is the measuring method for the flyash > > of cement and concrete with reference to GB/T1596-2005 < <
(4) strength detection method is according to GB/T17671-1999 < < Test method for strength of hydraulic cement mortar (ISO method) > >
Due to the cavernous structure of furnace-bottom dry slag, therefore water requirement is still larger.Therefore the present invention further improves, will discard marble flour and furnace-bottom dry slag is composite, make full use of discarded marble flour filling effect, active effect and acceleration effect and make up the defect of furnace-bottom dry slag, and can better carry out waste reside comprehensive utilization again, save cost.Because the specific surface area of discarded marble flour is very large, belong to ultrafine powder, there is more fine particle.Although it does not possess pozzolanic activity in early days, because it does not during churning participate in hydration reaction, can obtain better shape effect.Discarded marble flour particle is dispersed between cement and furnace-bottom dry slag particle, has filled intergranular space, makes slurry more closely knit, reduces voidage and aperture diameter, improves pore structure.
By cement, discarded marble flour, furnace-bottom dry slag (wherein furnace-bottom dry slag used+discarded marble flour the fineness of described complex mineral blending material be 450-550 m
2/ kg) and high-efficiency water-reducing agent of poly-carboxylic acid by JCT 1083-2008 < < cement and the requirement of water reducer compatibility test method > >-marshall's method, together stir into clean slurry, measure clean slurry degree of mobilization, the results are shown in Table 2, wherein in table 2 per-cent be expressed as the percentage that constituent mass accounts for cement, discarded marble flour, furnace-bottom dry slag and high-efficiency water-reducing agent of poly-carboxylic acid total mass.Can find out by the initial Marsh time, discarded marble flour incorporation is more, and the initial Marsh time is just less, only starches mobility and improves.Illustrated that furnace-bottom dry slag-discarded marble flour complex mineral blending material that the present invention finds has obvious mineral diminishing feature.
The initial Marsh time of the clean slurry of table 2
Discarded marble flour is incorporated into furnace-bottom dry slag as complex mineral blending material, not only can make only to starch mobility and improve, and can also make the early strength of furnace-bottom dry slag-discarded marble flour-cement system increase.The present invention measures (strength detection method is according to GB/T17671-1999 < < Test method for strength of hydraulic cement mortar (ISO method) > >) to furnace-bottom dry slag-discarded marble flour-cement system, the results are shown in Table 3, wherein the fineness of complex mineral blending material used is 450-550 m
2/ kg, wherein in table 3 per-cent be expressed as the percentage that constituent mass accounts for cement, discarded marble flour, furnace-bottom dry slag total mass.Presentation of results the furnace-bottom dry slag found of the present invention-discarded marble flour complex mineral blending material can improve the early strength of system.As can be seen from Table 3, although add the early strength of the complex mineral blending material of 10% marble flour slightly to decline, intensity still can reach the strength grade of ordinary Portland cement 42.5.
Table 3
Embodiment
In order to make content of the present invention more be convenient to understand, below in conjunction with embodiment, technical solutions according to the invention are described further, but the present invention is not limited only to this.
In embodiment, furnace-bottom dry slag used is taken from Fujian Province Hong Shan Power Co., Ltd., and discarded marble flour is taken from Nanan's head town.
Embodiment 1
By 45g furnace-bottom dry slag and dry discarded marble flour combined grinding to the specific surface area of 13.5g, be 450m
2/ kg, mixes in the cement of 391.5g.
Embodiment 2
By 90g furnace-bottom dry slag and dry discarded marble flour combined grinding to the specific surface area of 45g, be 460m
2/ kg, mixes in the cement of 315g.
Embodiment 3
By 90g furnace-bottom dry slag and dry discarded marble flour combined grinding to the specific surface area of 22.5g, be 500m
2/ kg, mixes in the cement of 337.5g.
Embodiment 4
By 108g furnace-bottom dry slag grinding to specific surface area, be 540m
2/ kg, mixes in the cement of 342g.
Embodiment 5
Effect with furnace-bottom dry slag and discarded marble flour complex mineral blending material concrete batching.
With complex mineral blending material of the present invention, substitute 20%-30% cement, preparation high performance concrete.Test raw materials is:
Cement: ordinary Portland cement PO42.5;
It is 522 m that furnace-bottom dry slag and dry marble flour carry out grinding to surface-area after proportioning according to the ratio of following table
2/ kg.
Sand: medium sand;
Rubble: 5-20mm rubble;
High efficiency water reducing agent: high-efficiency water-reducing agent of poly-carboxylic acid
Concrete mix (the kg/m of table 4 complex mineral blending material
3)
Table 5 concrete crushing strength (MPa)
Table 4, table 5 result show, the concrete of admixture furnace-bottom dry slag and discarded marble flour complex mineral blending material can significantly reduce water consumption, and early strength is also higher.
Note: (1) mix-design is according to JGJ55-2011 < < design of common concrete proportioning rules > >
(2) slump check is according to GB/T50080-2002 < < Standard for test methods of properties of ordinary concrete mixture standard > >
(3) ultimate compression strength check is according to GB/T50081-2002 < < standard for test methods of mechanical properties of ordinary concrete > >.
Claims (4)
1. for a complex mineral blending material for cement and concrete, comprise furnace-bottom dry slag and marble flour, parts by weight are:
2 parts of furnace-bottom dry slags, marble flour 0-1 part, its specific surface area is 450-550m
2/ kg.
2. a preparation method for complex mineral blending material as claimed in claim 1, mixes the dry marble flour after furnace-bottom dry slag and oven dry by described parts by weight, and being crushed to specific surface area is 450-550m
2/ kg.
3. a usage for complex mineral blending material as claimed in claim 1, is characterized in that it accounts for the 20-30% of gross weight in cement after admixture.
4. a usage for complex mineral blending material as claimed in claim 1, is characterized in that its addition content in concrete gel material is the 20-30% that accounts for cement and complex mineral blending material weight.
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| CN201310550704.1A CN103553399B (en) | 2013-11-09 | 2013-11-09 | A kind of for the complex mineral blending material in cement and concrete |
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| CN201310550704.1A CN103553399B (en) | 2013-11-09 | 2013-11-09 | A kind of for the complex mineral blending material in cement and concrete |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107500681A (en) * | 2017-10-12 | 2017-12-22 | 贺州学院 | A kind of fiber reinforced concretes and preparation method thereof |
| CN110041007A (en) * | 2019-03-11 | 2019-07-23 | 武汉理工大学 | A kind of impervious marble powder composite blend and its application |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1785890A (en) * | 2005-10-20 | 2006-06-14 | 景镇子 | Method of solidifying river selimented silt as ceramic construction material |
-
2013
- 2013-11-09 CN CN201310550704.1A patent/CN103553399B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1785890A (en) * | 2005-10-20 | 2006-06-14 | 景镇子 | Method of solidifying river selimented silt as ceramic construction material |
Non-Patent Citations (1)
| Title |
|---|
| 朱春江 等: "电厂炉底干渣的原材料性能", 《粉煤灰》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107500681A (en) * | 2017-10-12 | 2017-12-22 | 贺州学院 | A kind of fiber reinforced concretes and preparation method thereof |
| CN110041007A (en) * | 2019-03-11 | 2019-07-23 | 武汉理工大学 | A kind of impervious marble powder composite blend and its application |
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| CN103553399B (en) | 2016-02-17 |
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Effective date of registration: 20220809 Address after: 7th and 8th Floor, Building 4, Luzhuang Tingyuan, No. 10 Liuqiao Lane, Yangqiao Middle Road, Gulou District, Fuzhou City, Fujian Province, 350002 Patentee after: Fujian Building Materials Research Institute Co., Ltd. Address before: No. 174, Yangqiao Middle Road, Fuzhou City, Fujian Province, 350002 Patentee before: FUJIAN FUNENG CONSTRUCTION MATERIAL TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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