CN105776907A - Special air-setting hydraulic Portland cement for wet-mixed mortar - Google Patents
Special air-setting hydraulic Portland cement for wet-mixed mortar Download PDFInfo
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- CN105776907A CN105776907A CN201410812923.7A CN201410812923A CN105776907A CN 105776907 A CN105776907 A CN 105776907A CN 201410812923 A CN201410812923 A CN 201410812923A CN 105776907 A CN105776907 A CN 105776907A
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- portland cement
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Abstract
The invention relates to a special air-setting hydraulic Portland cement for wet-mixed mortar. The special air-setting and hydraulic Portland cement comprises, by weight, 75 to 95% of cement, 1 to 5% of calcium hydroxide, 1.5 to 6% of bentonite, 0 to 8% of fly ash, 0.5 to 3.9% of silica fume, 0.005 to 0.015% of an air-entrainer and 0.03 to 0.2% of polyvinyl alcohol. The wet-mixed mortar prepared by blending the air-setting and hydraulic Portland cement provided by the invention, machine-made sand, a water reducer, a delayed coagulant and fly ash in a proper ratio with water has the characteristics of coagulation in an air environment and normal coagulation after open time and realizes non-coagulation within open time when not in use and immediate coagulation upon usage; in the open time, the motor has good construction performance, so construction efficiency can be effectively improved, and production cost is substantially reduced; and since few raw materials are used, easy controllability is realized in production.
Description
Technical field
The present invention relates to the preparation method of a kind of structure material, particularly relate to a kind of wet mixing mortar special airsetting hydraulicity portland cement.
Background technology
Mortar is a kind of basic construction material in building trade, applies quite varied in architectural engineering.In June, 2007, Department of Commerce, house town and country construction Bu Deng 6 ministries and commissions combine and issue " notice about forbidding Site mortar working at urban time limit ", and in this context, commodity wet mixing mortar has welcome opportunity to develop.
Wet mixing mortar relies on the production line of commerical ready-mixed concrete, make full use of business to mix station equipment and carry out production at night standby time, this special mode of production determines mortar, and to have water retention property good, the feature that setting time is longer with the receipts water time, but, workman has been accustomed to existing sand cutting slurry and has received that water is fast, the characteristic of fast drying, often produces illusion hard-to-use to new product；It addition, the mixed station of business is limited by self working condition, it is desirable to wet mixing mortar raw material is the fewest, to reduce equipment cost.
Wet mixing mortar transports onsite application from production, as commerical ready-mixed concrete, the requirement to its service behaviour is higher, it is ensured that certain operable time, mortar, after the mix that adds water, to have the best workability before initial set, can carry out normal construction, operation.In order to meet specification and the construction requirement of wet mixing mortar, both at home and abroad mortar additive is studied by a large amount of scholars, including diminishing component, water-keeping thickening component, slow setting component, plasticity-maintaining agent etc., have ignored and starts with solution problem from cement itself.It addition, according to construction requirement, wet mixing mortar should accomplish " need not coagulate, instant solidifying ", and wet mixing mortar is controlled for setting time, beyond doubt technological difficulties
Publication No. CN102167559A, publication date is on August 31st, 2011, and the Chinese invention patent application of Application No. CN201110030886 discloses a kind of quick-setting cement mortar and preparation method thereof.Specifically it is made up of according to a certain weight ratio materials such as sulphate aluminium cement, SBR emulsion, polyaminoester emulsion, water reducer, triethanolamine, hydroxyethyl cellulose, fiber, river sand, water.There is the features such as rapid draing under room temperature, early strength height, cracking resistance and good endurance.Can be widely applied to the fields such as embankment reinforcement, the anti-seepage of channels, water and soil conservation, side slope protection and concrete road surface Rapid-Repair.But owing to this mortar contains sulphate aluminium cement, cost is high, and fails to be widely used in civil buildings.
Publication No. CN101717232A, publication date is on June 2nd, 2010, the Chinese invention patent application of Application No. CN200910311426.8 discloses a kind of by cement, supporting material, compound heat-insulation aggregate, chopped fiber, hydrophober, thickening agent, the high-performance light of redispersible powder and slag sand composition is answered and mortar, although this mortar has excellent water conservation, anticracking, waterproof, the performances such as fire prevention and good cohesive force and sag resistance, hollowing can be stopped, the generation of cracking, but owing to its raw material types is many, it is difficult to control to during production and is not widely popularized.
" need not coagulate, instant solidifying " technology requirement the most do not accomplished by the mortar that both patents provide.
Summary of the invention
In order to overcome existing cement mortar cost height, wet mixing mortar uncontrollable defect setting time, the invention provides a kind of wet mixing mortar special airsetting hydraulicity portland cement, the wet mixing mortar prepared with this cement has air ambient and condenses and the normal characteristic condensed after the open hour, and mortar need not coagulate in realizing the open hour, instant solidifying effect；Within the open hour, mortar has good workability, it is possible to effectively improving efficiency of construction, and greatly reduce production cost, raw material is few simultaneously, easily controllable during production.
A kind of wet mixing mortar special airsetting hydraulicity portland cement, it is characterised in that: include following composition by weight percentage:
Common portland cement: 75%-95%
Slaked lime: 1%-7%
Bentonite: 1.5%-6%
Flyash: 0%-8%
Silicon ash: 0.5%-3.9%
Air entraining agent: 0.005%-0.015%
Polyvinyl alcohol: 003%-0.2%.
Described common portland cement includes: portland cement (P I type or P II type), Portland cement, portland slag cement, Portland pozzolana cement, Portland fly ash cement or composite Portland cement.
Described slaked lime uses calcareous slaked lime, and in slaked lime, the mass percent sum of calcium oxide+magnesium oxide is not less than 85%.
Described bentonite is sodium bentonite, and water absorption rate is more than 300%, and 80 μm screen over-sizes are less than 8%.
Described flyash water demand ratio is less than 115%, and 80 μm screen over-sizes are less than 10%.
In described silicon ash, the mass percent of silicon dioxide is more than 85%, and specific surface area is more than 15m2/ g, activity index is more than 105%.
The invention have the advantages that
The airsetting hydraulicity portland cement and the retarder that there is provided by the present invention, Machine-made Sand, flyash add water after mix by proper proportion, wet mixing mortar open hour length (more than 8h) of preparing and in the open hour denseness loss less than 15mm, after construction, about 4h condenses, compared with common wet mixing mortar, it is achieved the effect of " need not coagulate, instant solidifying "；Within the open hour, mortar has good workability, it is possible to effectively improve efficiency of construction；During it addition, the mixed station of business uses this cement, only need to add sand, water and water reducer, equipment cost will not be increased.
Detailed description of the invention
Embodiment 1
In the present embodiment, airsetting hydraulicity portland cement includes the composition of following percentage by weight meter:
P I type portland cement: 74.985%
Slaked lime: 5%
Bentonite: 5%
Flyash: 11%
Silicon ash: 3.9%
Air entraining agent: 0.015%
Polyvinyl alcohol: 0.1%.
Described slaked lime uses calcareous slaked lime, and in slaked lime, the mass percent sum of calcium oxide+magnesium oxide is 85%.
Described bentonite is sodium bentonite, and water absorption rate is 305%, and 80 μm screen over-sizes are 6%.
Described flyash water demand ratio is 110%, and 80 μm screen over-sizes are 9%.
In described silicon ash, the mass percent of silicon dioxide is 86%, and specific surface area is 16m2/ g, activity index is 108%.
After testing, the technical parameter of the airsetting hydraulicity portland cement in the present embodiment is that (experimental technique is with reference to GB/T1346-2001
Cement normal consistency water consumption, setting time, the stability method of inspection and GB/T 17671-1999 Test method for strength of hydraulic cement mortar, lower same):
Presetting period: 152min, final setting time: 207min；
3 days comprcssive strength: 30.2MPa,
3 days rupture strength: 5.1MPa；
28 days comprcssive strength: 56MPa, 28 days rupture strength: 6.5MPa.
200 parts of airsetting hydraulicity portland cements and 1300 parts of Machine-made Sands, 0.45 part of saccharide retarder, 100 parts of flyash examples in mass ratio of this embodiment prepare wet mixing mortar after adding 230 parts of water mixing, and the denseness of wet mixing mortar is: 90mm；Stand denseness loss 14mm after 8h；Water retention is: 95%；Delamination degree is: 7mm；After construction, setting time is: 200min, and the congealing property shown is: need not coagulate, instant solidifying.
Embodiment 2
In the present embodiment, airsetting hydraulicity portland cement includes the composition of following percentage by weight meter:
P II type portland cement: 79.985%
Slaked lime: 5%
Bentonite: 5%
Flyash: 6%
Silicon ash: 3.9%
Air entraining agent: 0.015%
Polyvinyl alcohol: 0.1%.
Described slaked lime uses calcareous slaked lime, and in slaked lime, the mass percent sum of calcium oxide+magnesium oxide is 86%.
Described bentonite is sodium bentonite, and water absorption rate is 320%, and 80 μm screen over-sizes are 6%.
Described flyash water demand ratio is 114%, and 80 μm screen over-sizes are 8%.
In described silicon ash, the mass percent of silicon dioxide is 86%, and specific surface area is 18m2/ g, activity index is 106%.
After testing, the technical parameter of the airsetting hydraulicity portland cement in the present embodiment is:
Presetting period: 149min, final setting time: 200min；
3 days comprcssive strength: 29.1MPa,
3 days rupture strength: 4.8MPa；
28 days comprcssive strength: 54MPa, 28 days rupture strength: 6.3MPa.
200 parts of airsetting hydraulicity portland cements and 1300 parts of Machine-made Sands, 0.45 part of saccharide retarder, 100 parts of flyash examples in mass ratio of this embodiment prepare wet mixing mortar after adding 230 parts of water mixing, and the denseness of wet mixing mortar is: 90mm；Stand denseness loss 15mm after 8h；Water retention is: 94.6%；Delamination degree is: 8mm；After construction, setting time is: 205min, and the congealing property that mortar shows is: need not coagulate, instant solidifying.
Embodiment 3
In the present embodiment, airsetting hydraulicity portland cement includes the composition of following percentage by weight meter:
Portland cement: 85%
Slaked lime: 2.5%
Bentonite: 1.7%
Flyash: 8%
Silicon ash: 2.7%
Air entraining agent: 0.015%
Polyvinyl alcohol: 0.085%.
Described slaked lime uses calcareous slaked lime, and in slaked lime, the mass percent sum of calcium oxide+magnesium oxide is 88%.
Described bentonite is sodium bentonite, and water absorption rate is 330%, and 80 μm screen over-sizes are 5%.
Described flyash water demand ratio is 105%, and 80 μm screen over-sizes are 9%.
In described silicon ash, the mass percent of silicon dioxide is 88%, and specific surface area is 18m2/ g, activity index is 110%.
After testing, the technical parameter of the airsetting hydraulicity portland cement in the present embodiment is:
Presetting period: 156min, final setting time: 217min；
3 days comprcssive strength: 30MPa,
3 days rupture strength: 5MPa；
28 days comprcssive strength: 55MPa, 28 days rupture strength: 6.4MPa.
200 parts of airsetting hydraulicity portland cements and 1300 parts of Machine-made Sands, 0.45 part of saccharide retarder, 100 parts of flyash examples in mass ratio of this embodiment prepare wet mixing mortar after adding 230 parts of water mixing, and the denseness of wet mixing mortar is: 95mm；Stand 8h denseness loss 10mm；Water retention is: 98%；Delamination degree is: 6mm；After construction, setting time is: 220min, and mortar shows the characteristic of " need not coagulate, instant solidifying ".
Embodiment 4
In the present embodiment, airsetting hydraulicity portland cement includes the composition of following percentage by weight meter:
Portland slag cement (slag content 20% in cement): 92%
Slaked lime: 1.7%
Bentonite: 2%
Flyash: 4%
Silicon ash: 0.195%
Air entraining agent: 0.01%
Polyvinyl alcohol: 0.1%.
Described slaked lime uses calcareous slaked lime, and in slaked lime, the mass percent sum of calcium oxide+magnesium oxide is 89%.
Described bentonite is sodium bentonite, and water absorption rate is 305%, and 80 μm screen over-sizes are 7.5%.
Described flyash water demand ratio is 114%, and 80 μm screen over-sizes are 8.9%.
In described silicon ash, the mass percent of silicon dioxide is 88%, and specific surface area is 19m2/ g, activity index is 118%.
After testing, the technical parameter of the airsetting hydraulicity portland cement in the present embodiment is:
Presetting period: 146min, final setting time: 213min；
3 days comprcssive strength: 27.9MPa,
3 days rupture strength: 4.8MPa；
28 days comprcssive strength: 52MPa, 28 days rupture strength: 6.0MPa.
210 parts of airsetting hydraulicity portland cements and 1300 parts of Machine-made Sands, 0.45 part of saccharide retarder, 90 parts of flyash examples in mass ratio of this embodiment prepare wet mixing mortar after adding 230 parts of water mixing, and the denseness of wet mixing mortar is: 92mm；Stand 8h denseness loss 12mm；Water retention is: 94%；Delamination degree is: 5mm；After construction, setting time is: 235min, and mortar shows the characteristic of " need not coagulate, instant solidifying ".
Embodiment 5
In the present embodiment, airsetting hydraulicity portland cement includes the composition of following percentage by weight meter:
Portland-pozzolan cement (volcano ash content 23% in cement): 95%
Slaked lime: 3%
Bentonite: 1%
Flyash: 0%
Silicon ash: 0.94%
Air entraining agent: 0.01%
Polyvinyl alcohol: 0.05%.
Described slaked lime uses calcareous slaked lime, and in slaked lime, the mass percent sum of calcium oxide+magnesium oxide is 88.5%.
Described bentonite is sodium bentonite, and water absorption rate is 315%, and 80 μm screen over-sizes are 6.5%.
Described flyash water demand ratio is 108%, and 80 μm screen over-sizes are 6.5%.
In described silicon ash, the mass percent of silicon dioxide is 86%, and specific surface area is 16m2/ g, activity index is 114%.
After testing, the technical parameter of the airsetting hydraulicity portland cement in the present embodiment is:
Presetting period: 160min, final setting time: 230min；
3 days comprcssive strength: 27.0MPa,
3 days rupture strength: 4.4MPa；
28 days comprcssive strength: 50MPa, 28 days rupture strength: 5.7MPa.
210 parts of airsetting hydraulicity portland cements and 1300 parts of Machine-made Sands, 0.45 part of saccharide retarder, 90 parts of flyash examples in mass ratio of this embodiment prepare wet mixing mortar after adding 230 parts of water mixing, and the denseness of wet mixing mortar is: 94mm；Stand 8h denseness loss 6mm；Water retention is: 96%；Delamination degree is: 16mm；After construction, setting time is: 240min, and mortar shows the characteristic of " need not coagulate, instant solidifying ".
Embodiment 6
In the present embodiment, airsetting hydraulicity portland cement includes the composition of following percentage by weight meter:
Portland fly ash cement (fly ash content 30% in cement): 94.895%
Slaked lime: 2%
Bentonite: 1.5%
Flyash: 0
Silicon ash: 1.5%
Air entraining agent: 0.005%
Polyvinyl alcohol: 0.1%.
Described slaked lime uses calcareous slaked lime, and in slaked lime, the mass percent sum of calcium oxide+magnesium oxide is 87%.
Described bentonite is sodium bentonite, and water absorption rate is 306%, and 80 μm screen over-sizes are 6.8%.
Described flyash water demand ratio is 112.8%, and 80 μm screen over-sizes are 7.8%.
In described silicon ash, the mass percent of silicon dioxide is 86.5%, and specific surface area is 16.5m2/ g, activity index is 112%.
After testing, the technical parameter of the airsetting hydraulicity portland cement in the present embodiment is:
Presetting period: 162min, final setting time: 235min；
3 days comprcssive strength: 26.6MPa,
3 days rupture strength: 4.4MPa；
28 days comprcssive strength: 49MPa, 28 days rupture strength: 5.6MPa.
210 parts of airsetting hydraulicity portland cements and 1300 parts of Machine-made Sands, 0.45 part of saccharide retarder, 90 parts of flyash examples in mass ratio of this embodiment prepare wet mixing mortar after adding 230 parts of water mixing, and the denseness of wet mixing mortar is: 98mm；Stand 8h denseness loss 6mm；Water retention is: 96%；Delamination degree is: 6mm；After construction, setting time is: 235min, and mortar shows the characteristic of " need not coagulate, instant solidifying ".
Embodiment 7
In the present embodiment, airsetting hydraulicity portland cement includes the composition of following percentage by weight meter:
Composite Portland cement (mixes material content 30%) in cement: 94.885%
Slaked lime: 3%
Bentonite: 1%
Flyash: 0%
Silicon ash: 1%
Air entraining agent: 0.015%
Polyvinyl alcohol: 0.1%.
Described slaked lime uses calcareous slaked lime, and in slaked lime, the mass percent sum of calcium oxide+magnesium oxide is 88%.
Described bentonite is sodium bentonite, and water absorption rate is 315%, and 80 μm screen over-sizes are 7.8%.
Described flyash water demand ratio is 110.5%, and 80 μm screen over-sizes are 8.5%.
In described silicon ash, the mass percent of silicon dioxide is 88.5%, and specific surface area is 16.8m2/ g, activity index is 125%.
After testing, the technical parameter of the airsetting hydraulicity portland cement in the present embodiment is:
Presetting period: 157min, final setting time: 220min；
3 days comprcssive strength: 26.7MPa of cement mortar, 3 days rupture strength: 4.8MPa；
28 days comprcssive strength: 51MPa, 28 days rupture strength: 5.7MPa.
210 parts of airsetting hydraulicity portland cements and 1300 parts of Machine-made Sands, 0.45 part of saccharide retarder, 90 parts of flyash examples in mass ratio of this embodiment prepare wet mixing mortar after adding 230 parts of water mixing, and the denseness of wet mixing mortar is: 99mm；Stand 8h denseness loss 15mm；Water retention is: 98%；Delamination degree is: 7mm；After construction, setting time is: 232min, and mortar shows the characteristic of " need not coagulate, instant solidifying ".
The technical specification summing up technical specification and prepared wet mixing mortar that above-described embodiment understands the present invention enters shown in following table:
Claims (6)
1. a wet mixing mortar special airsetting hydraulicity portland cement, it is characterised in that: include following composition by weight percentage:
Common portland cement: 75%-95%
Slaked lime: 1%-7%
Bentonite: 1.5%-6%
Flyash: 0%-8%
Silicon ash: 0.5%-3.9%
Air entraining agent: 0.005%-0.015%
Polyvinyl alcohol: 003%-0.2%.
A kind of wet mixing mortar special airsetting hydraulicity portland cement the most according to claim 1, it is characterised in that: described common portland cement is: portland cement, Portland cement, portland slag cement, Portland pozzolana cement, Portland fly ash cement or composite Portland cement.
A kind of wet mixing mortar special airsetting hydraulicity portland cement the most according to claim 1, it is characterised in that: described slaked lime uses calcareous slaked lime, and in slaked lime, the mass percent sum of calcium oxide and magnesium oxide is not less than 85%.
A kind of wet mixing mortar special airsetting hydraulicity portland cement the most according to claim 1, it is characterised in that: described bentonite is sodium bentonite, and water absorption rate is more than 300%, and 80 μm screen over-sizes are less than 8%.
A kind of wet mixing mortar special airsetting hydraulicity portland cement the most according to claim 1, it is characterised in that: described flyash water demand ratio is less than 115%, and 80 μm screen over-sizes are less than 10%.
6. according to a kind of wet mixing mortar special airsetting hydraulicity portland cement described in claim 1,2,3,4 or 5, it is characterised in that: described silicon ash dioxide-containing silica is more than 85%, and specific surface area is more than 15m2/ g, activity index is more than 105%.
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| CN201410812923.7A CN105776907B (en) | 2014-12-24 | 2014-12-24 | A kind of solidifying property portland cement of the special air condensate of wet mixing mortar |
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| US6451105B1 (en) * | 2000-11-17 | 2002-09-17 | Raymond C. Turpin, Jr. | Cementitious composition with limestone accelerator |
| CN101182139A (en) * | 2007-11-12 | 2008-05-21 | 华南理工大学 | Masonry cement having higher strength and water retention |
| CN101348336A (en) * | 2008-09-03 | 2009-01-21 | 东南大学 | Composite type special cement for ready-mixed mortar |
| CN102584044A (en) * | 2012-01-12 | 2012-07-18 | 广西云燕特种水泥建材有限公司 | Sulphoaluminate maritime work cement and preparation method thereof |
| CN103601445A (en) * | 2013-11-14 | 2014-02-26 | 江苏蓝圈新材料有限公司 | Hollow glazed bead thermal-insulation mortar |
| CN103880310A (en) * | 2014-02-20 | 2014-06-25 | 辽宁石化职业技术学院 | Portland blast furnace slag cement and preparation method thereof |
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2014
- 2014-12-24 CN CN201410812923.7A patent/CN105776907B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6451105B1 (en) * | 2000-11-17 | 2002-09-17 | Raymond C. Turpin, Jr. | Cementitious composition with limestone accelerator |
| CN101182139A (en) * | 2007-11-12 | 2008-05-21 | 华南理工大学 | Masonry cement having higher strength and water retention |
| CN101348336A (en) * | 2008-09-03 | 2009-01-21 | 东南大学 | Composite type special cement for ready-mixed mortar |
| CN102584044A (en) * | 2012-01-12 | 2012-07-18 | 广西云燕特种水泥建材有限公司 | Sulphoaluminate maritime work cement and preparation method thereof |
| CN103601445A (en) * | 2013-11-14 | 2014-02-26 | 江苏蓝圈新材料有限公司 | Hollow glazed bead thermal-insulation mortar |
| CN103880310A (en) * | 2014-02-20 | 2014-06-25 | 辽宁石化职业技术学院 | Portland blast furnace slag cement and preparation method thereof |
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