CN103508705A - Ejection type ductile PP fiber strengthened cement base composite material and preparation method thereof - Google Patents
Ejection type ductile PP fiber strengthened cement base composite material and preparation method thereof Download PDFInfo
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Abstract
The invention relates to an ejection type ductile fiber strengthened cement base composite material and a preparation method thereof, and belongs to the technical field of construction material. The composite material formula comprises the following raw materials in parts by weight: 19 to 36 parts of cement, 1.9 to 5.7 parts of rubber powder, 11 to 40 parts of fly ash, 12 to 35 parts of river sand, 10 to 30 parts of stone, 7 to 18 parts of water, 1 to 2.2 parts of accelerator, 0.1 to 0.8 part of powder water reducer, 1 to 1.8 parts of redispersible latex powder, and 0.8 to 2 parts of PP fiber. The ejection type ductile PP fiber strengthened cement base composite material is prepared through following steps: primary stirring, secondary stirring, and final set. The invention provides a fiber strengthened cement base composited material, which has the advantages of low cost, simple processing, low requirements on processing technology and operation environment, and stable mechanical properties, and a preparation method thereof.
Description
Technical field
The present invention relates to a kind of fiber reinforced cement-based composite material for soft rock supporting engineerings such as mine working, Rail Highway tunnel, subway tunnels and preparation method thereof, particularly relate to a kind of ejection-type ductility fiber reinforced cement-based composite material and preparation method thereof, belong to building material technical field.
Background technology
The ductility fibrous concrete materials theory the earliest Victor C. Li professor of Shi You U.S. University of Michigan and the Christopher K. Y. Leung of Massachusetts Institute of Technology is taught and was put forward in 1992, to attempt to solve the enhancing of cement-base composite material, toughness reinforcing problem with polyethylene fibre (Polyethylene is called for short PE) the earliest.The people such as Victot. C. Li in 1997 start PVA for ECC, have made polyvinyl alcohol (Polyvinyl Alcohol is called for short PVA) fiber reinforced cement-based composite material.
China researchist has carried out further research and development to high performance fibre cement based composites, for example, public Cheng Xu, Mr. Zhang have reported proportioning, preparation process and the tensile mechanical properties of high tenacity polyethylene alcohol fiber (PVA) refinforced cement based composites in the article that is entitled as " tensile property of high-tenacity fiber refinforced cement based composites ", it is characterized in that: take fibers content and sand glue ratio is basic design parameters, by adjusting water-cement ratio and doping quantity of fly ash, study its performance; The Yu Jiahuan of Shenyang Mei Yang construction project Management Co., Ltd has applied for patent (201010010157.4) " a kind of high-toughness polypropylene fiber reinforced cement-based composite material and preparation method thereof " in 2012, its patent characteristic is: adopted two kinds of chemical additives: thickening material, super mould agent, and adjusted the addition of thickening material.Although the fiber reinforced cement-based composite material providing in above-mentioned preparation scheme has all obtained strain hardening phenomenon and compound cracking effect, be all to adopt mould to note constructional method.In March, 2012, the money of 14 Southeast China University suck that intelligence, Zhang Zhigang, Zhao Ting, Sun Jia, Cui Kai, Wu are entered, Zhang Jingran has declared patent (201210066241. 7) " high ductility cement-base composite material premixing method ", this invention provides high ductility cement-base composite material premixing technology, mainly in large-scale stirring station/building/machine, efficient powdery water reducer of the cement adding, flyash, fiber, quartz sand and powdery etc. is stirred, each component is mixed, transport to working-yard and add water stirring, mould is noted construction.
Soft-rock tunnel and deep mining roadway support are one of generally acknowledged difficult problems of Mining At Home And Abroad circle always.They own the feature that surrouding rock deformation is large, stress is large together, particularly deep mining is because mining depth increases, and terrestrial stress increases gradually, if do not take suitable support pattern, deformation of the surrounding rock in tunnel is more violent, supporting is also more difficult, and the accumulation of distortion will cause tunnel unstable failure.Therefore (ultimate compression strength is 40MPa left and right, bend ductility μ to study the cement-base composite material of high-strength, high tenacity
30being more than 30) problem of supporting carried out.Under current support pattern, tunnel goes to pot repeatly within the period of service, and need repeatedly overhaul (according to Datun mining area, Jiangsu, Northern Huaihe River Anhui statistics of mining area, the annual reparation expense in Mei meter tunnel just needs more than 2000 yuan), the annual reparation expense in deep mining tunnel, the whole nation is up to more than 3,600,000,000 yuan, and this has had a strong impact on the Economic development of mine normal production and enterprise.Deep-well tunnel supporting is one of coal mining gordian technique that need to solve.
This project application group Bi Yuanzhi in 2009, magnify " fibrous concrete is in the research project of soft rock roadway support " that the people such as woods, Jiang Yong, Hua Yuan, Jiang Chenguang complete the cooperation of Liao Yu Wan Beimei electricity group company.Modified polypropene (slightly) fibrous concrete has been carried out to fibrous concrete supporting research at the soft-rock tunnel of colliery buried depth 620 m, obtained scientific payoffs.In 2009, complete the research of colliery, Liao“Kong village deep tunnel fibrous concrete supporting utilisation technology ", problem applicant Bi Yuanzhi etc. was published in scientific payoffs on " coal journal " the 12nd phase in 2010,3 pieces of papers such as " application of high-tenacity fiber concrete in Deep Soft Rock Tunnel supporting "; 3 pieces of papers are to modified polypropene (slightly) and hybrid fiber concrete strengthens Toughening Properties and the application in deep-well supporting is studied, and obtained some scientific payoffss, for the present invention has established theoretical basis and practical experience.Above-mentioned research topic has proposed other additives such as ductility polypropylene fibre and flyash to be spiked into and in cement-based material, to form ductility material, by spray technology, make this cement-base composite material in the preparation method of underground space country rock shaping surface, by spray technology, complete the supporting to the deep-well underground space.
Summary of the invention
The object of the invention is to overcome above-mentioned weak point, provide that a kind of cost is low, processing is simple, complete processing and operating environment have been required to ejection-type ductility fiber reinforced cement-based composite material of lower, stable mechanical property and preparation method thereof.
According to technical scheme provided by the invention, a kind of ejection-type ductility PP fiber reinforced cement-based composite material, formula rate is as follows by weight: cement 19-36 part, rubber powder 1.9-5.7 part, flyash 11-40 Fen, river sand 12-35 part, stone 10-30 part, water 7-18 part, accelerating chemicals 1-2.2 part, powdery water reducer 0.1-0.8 part, redispersable latex powder 1.0-1.8 part, PP fiber 0.8-2 part.
Described accelerating chemicals is environment-friendly type alkali-free liquid accelerator.Described redispersable latex powder is the multipolymer of ethene and vinyl acetate.The mortar ratio M of described river sand is 2.5-3.2.The particle diameter of described stone is 5-10mm.Described PP Fibre diameter is 39 μ m, and length is 9-19mm.Described powdery water reducer is naphthalene series high-efficiency water-reducing agent or polycarboxylate high performance water-reducing agent.
A ductility PP fiber reinforced cement-based composite material, formula rate is as follows by weight: 23.5 parts of cement, 2.5 parts of rubber powders, 20 parts, flyash 22Fen, river sand, 15 parts, stone, 12 parts, water, 0.2 part of powdery water reducer, 1.8 parts of redispersable latex powders, 1.5 parts of PP fibers, 1.5 parts of accelerating chemicalss.
A ductility PP fiber reinforced cement-based composite material, formula rate is as follows by weight: 27 parts of cement, 1.9 parts of rubber powders, 23.5 parts, flyash 26Fen, river sand, 10 parts, stone, 7 parts, water, 0.2 part of powdery water reducer, 1.6 parts of redispersable latex powders, 1.2 parts of PP fibers, 1.6 parts of accelerating chemicalss.
A ductility PP fiber reinforced cement-based composite material, formula rate is as follows by weight: 22 parts of cement, 3 parts of rubber powders, flyash 25.6 19 parts, Fen, river sand, 14 parts, stone, 13 parts, water, 0.1 part of powdery water reducer, 1 part of redispersable latex powder, 1 part of polypropylene fibre, 1.3 parts of accelerating chemicalss.
The preparation method of described ejection-type ductility PP fiber reinforced cement-based composite material, step is as follows by weight:
(1) once stir: redispersable latex powder 1.0-1.8 part, powdery water reducer 0.1-0.8 part, rubber powder 1.9-5.7 part and PP fiber 0.8-2 part are added in stirrer and does stirring, and churning time is 2-3 minute, until these four kinds of base materials stir; Material pack by being stirred, obtains packed compound, transports to working-yard stand-by;
(2) secondary stirring: the packed compound of getting step (1) gained, add cement 19-36 part, flyash 11-40 Fen, river sand 12-35 part and stone 10-30 part, put First screw mixer (there is material loading and stir dual-use function) into, stir and be transported to second screw mixer, add water 7-18 part wet-mixing and be transported to wet-spraying machine;
(3) final set: the spray gun at wet-spraying machine is added accelerating chemicals 1-2.2 part in wet feed to, from lance ejection to crag on, initial set in 3-6 minute, final set in 10-14 minute, obtains product ejection-type ductility PP fiber reinforced cement-based composite material.
Beneficial effect of the present invention:
1, raw material is easy to get, cost is low: polypropylene fibre is available, cheap at home, makes the cost of finished product;
2, to complete processing and operating environment, require lower: when PP fiber reinforced cement based composite material is prepared, at room temperature can carry out, lower to complete processing and operating environment requirement, and also operation is more easy;
3, stable mechanical property: after PP fiber reinforced cement based composite material finished product, mechanical property is also more stable, there will not be mechanical property under same proportioning to differ more situation;
4, good toughness: polypropylene fibre used in the present invention is that hydrophobic fibre and Chemical bond can be zero, does the used time being subject to imposed load, and polypropylene fibre can produce the phenomenon of drawing and slippage, and is not easy to be pulled off, toughness more by force, more lasting;
5, safety, economy, durable roadway support material: in the deep-well tunnel supportings such as Che Ji colliery, Henan, Shanghai energy Kongzhuang Coal Mine, Datun Coal and Electric Power Co., brought into play good effect, Roadway Safety improves, and has significantly reduced roadway maintenance expense.
Accompanying drawing explanation
Fig. 1 is preparation method's of the present invention process flow sheet.
Note: 1 represents stirrer; 2 represent First screw mixer; 3 represent second screw mixer.
Embodiment
Environment-friendly type alkali-free liquid accelerator in embodiment is purchased from BASF chemical building material (China) company limited, and concrete model is Meyco SA 160 type accelerating chemicalss; Or to adopt the model purchased from Zhengzhou City Lan Rui engineering materials company limited be the environment-friendly type alkali-free liquid accelerator that Swjy liquid accelerating agent, Jiangsu Subotexin Material Co., Ltd produce.
Powdery water reducer is purchased from Jiangsu Subotexin Material Co., Ltd, and model is SBTJM
?-B naphthalene series high-efficiency water-reducing agent and SBTJM
?-A naphthalene series high-efficiency water-reducing agent or model are PCA
?-I or PCA
?the polycarboxylate high performance water-reducing agent of-V, or purchased from BASF chemical building material (China) company limited, model is Rb1100 naphthalene water reducer or Rheoplus 26 poly carboxylic acid series water reducers; Or Jssy polycarboxylate high performance water-reducing agent or the FDN naphthalene series high-efficiency water-reducing agent purchased from Zhengzhou City Lan Rui engineering materials company limited, produced.
Embodiment 1
23.5 parts of cement, 2.5 parts of rubber powders, 20 parts, flyash 22Fen, river sand (M=2.5-3.2), 15 parts, stone (particle diameter 5-10mm), 12 parts, water, 0.2 part of powdery water reducer, 1.8 parts of redispersable latex powders, 1.5 parts of polypropylene fibres, 1.5 parts of accelerating chemicalss.
The preparation method of described ejection-type ductility PP fiber reinforced cement-based composite material, step is as follows by weight:
(1) once stir: redispersable latex powder, powdery water reducer, rubber powder and PP fiber are added in stirrer and do stirring, and churning time is 2 minutes, until these four kinds of base materials stir; Material pack by being stirred, obtains packed compound, transports to working-yard stand-by;
(2) secondary stirring: get the packed compound of step (1) gained, add cement, flyash, river sand and stone, put First screw mixer into, stir and be delivered to second screw mixer, add water wet-mixing and be transported to wet-spraying machine;
(3) final set: the spray gun at wet-spraying machine is added 1.5 parts of accelerating chemicalss in wet feed to, from lance ejection to crag on, initial set in 3 minutes, final set in 10 minutes, obtains product ejection-type ductility PP fiber reinforced cement-based composite material.
Described accelerating chemicals is environment-friendly type alkali-free liquid accelerator.Described redispersable latex powder is the multipolymer of ethene and vinyl acetate.The fineness modulus M of described river sand is 2.5-3.2.The particle diameter of described stone is 5-10mm.Described PP Fibre diameter is 39 μ m, and length is 9-19mm.Described water reducer is naphthalene series high-efficiency water-reducing agent or polycarboxylate high performance water-reducing agent.
Embodiment 2
27 parts of cement, 1.9 parts of rubber powders, 23.5 parts, flyash 26Fen, river sand (M=2.5-3.2), 10 parts, stone (particle diameter 5-10mm), 7 parts, water, 0.2 part of powdery water reducer, 1.6 parts of redispersable latex powders, 1.2 parts of polypropylene fibres, 1.6 parts of accelerating chemicalss.
The preparation method of described ejection-type ductility PP fiber reinforced cement-based composite material, step is as follows by weight:
(1) once stir: redispersable latex powder, powdery water reducer, rubber powder and PP fiber are added in stirrer and do stirring, and churning time is 3 minutes, until these four kinds of base materials stir; Material pack by being stirred, obtains packed compound, transports to working-yard stand-by;
(2) secondary stirring: get the packed compound of step (1) gained, add cement, flyash, river sand and stone, put First screw mixer into, stir and be delivered to second screw mixer, add water wet-mixing and be transported to wet-spraying machine;
(3) final set: the spray gun at wet-spraying machine is added 1.6 parts of accelerating chemicalss in wet feed to, from lance ejection to crag on, initial set in 6 minutes, final set in 14 minutes, obtains product ejection-type ductility PP fiber reinforced cement-based composite material.
Described accelerating chemicals is environment-friendly type alkali-free liquid accelerator.Described redispersable latex powder is the multipolymer of ethene and vinyl acetate.The mortar ratio M of described river sand is 2.5-3.2.The particle diameter of described stone is 5mm.Described PP Fibre diameter is 39 μ m, and length is 9-19mm.Described water reducer is naphthalene series high-efficiency water-reducing agent or polycarboxylate high performance water-reducing agent.
Embodiment 3
22 parts of cement, 3 parts of rubber powders, flyash 25.6 19 parts, Fen, river sand (M=2.5-3.2), 14 parts, stone (particle diameter 5-10mm), 13 parts, water, 0.1 part of powdery water reducer, 1 part of redispersable latex powder, 1 part of polypropylene fibre, 1.3 parts of accelerating chemicalss.
The preparation method of described ejection-type ductility PP fiber reinforced cement-based composite material, step is as follows by weight:
(1) once stir: redispersable latex powder, powdery water reducer, rubber powder and PP fiber are added in stirrer and do stirring, and churning time is 3 minutes, until these four kinds of base materials stir; Material pack by being stirred, obtains packed compound, transports to working-yard stand-by;
(2) secondary stirring: get the packed compound of step (1) gained, add cement, flyash, river sand and stone, put First screw mixer into, stir and be delivered to second screw mixer, add water wet-mixing and be transported to wet-spraying machine;
(3) final set: the spray gun at wet-spraying machine is added 1.3 parts of accelerating chemicalss in wet feed to, from lance ejection to crag on, initial set in 5 minutes, final set in 12 minutes, obtains product ejection-type ductility PP fiber reinforced cement-based composite material.
Described accelerating chemicals is environment-friendly type alkali-free liquid accelerator.Described redispersable latex powder is the multipolymer of ethylene/vinyl acetate.The fineness modulus M of described river sand is 2.5-3.2.The particle diameter of described stone is 5-10mm.Described PP Fibre diameter is 39 μ m, and length is 9-19mm.Described water reducer is naphthalene series high-efficiency water-reducing agent or polycarboxylate high performance water-reducing agent.
Claims (10)
1. an ejection-type ductility PP fiber reinforced cement-based composite material, it is characterized in that formula rate by weight: cement 19-36 part, rubber powder 1.9-5.7 part, flyash 11-40 Fen, river sand 12-35 part, stone 10-30 part, water 7-18 part, accelerating chemicals 1-2.2 part, powdery water reducer 0.1-0.8 part, redispersable latex powder 1.0-1.8 part, PP fiber 0.8-2 part.
2. ejection-type ductility PP fiber reinforced cement-based composite material as claimed in claim 1, is characterized in that: described accelerating chemicals is environment-friendly type alkali-free liquid accelerator; Described powdery water reducer is naphthalene series high-efficiency water-reducing agent or polycarboxylate high performance water-reducing agent.
3. ejection-type ductility PP fiber reinforced cement-based composite material as claimed in claim 1, is characterized in that: the multipolymer that described redispersable latex powder is ethylene/vinyl acetate.
4. ejection-type ductility PP fiber reinforced cement-based composite material as claimed in claim 1, is characterized in that: the fineness modulus M of described river sand is 2.5-3.2.
5. ejection-type ductility PP fiber reinforced cement-based composite material as claimed in claim 1, is characterized in that: the particle diameter of described stone is 5-10mm.
6. ejection-type ductility PP fiber reinforced cement-based composite material as claimed in claim 1, is characterized in that: described PP Fibre diameter is 39 μ m, and length is 9-19mm.
7. ejection-type ductility PP fiber reinforced cement-based composite material as claimed in claim 1, is characterized in that described formula rate by weight: 23.5 parts of cement, 2.5 parts of rubber powders, 20 parts, flyash 22Fen, river sand, 15 parts, stone, 12 parts, water, 0.2 part of powdery water reducer, 1.8 parts of redispersable latex powders, 1.5 parts of PP fibers, 1.5 parts of accelerating chemicalss.
8. ejection-type ductility PP fiber reinforced cement-based composite material as claimed in claim 1, is characterized in that described formula rate by weight: 27 parts of cement, 1.9 parts of rubber powders, 23.5 parts, flyash 26Fen, river sand, 10 parts, stone, 7 parts, water, 0.2 part of powdery water reducer, 1.6 parts of redispersable latex powders, 1.2 parts of PP fibers, 1.6 parts of accelerating chemicalss.
9. ejection-type ductility PP fiber reinforced cement-based composite material as claimed in claim 1, is characterized in that described formula rate by weight: 22 parts of cement, 3 parts of rubber powders, flyash 25.6 19 parts, Fen, river sand, 14 parts, stone, 13 parts, water, 0.1 part of powdery water reducer, 1 part of redispersable latex powder, 1 part of polypropylene fibre, 1.3 parts of accelerating chemicalss.
10. the preparation method of ejection-type ductility PP fiber reinforced cement-based composite material described in claim 1, is characterized in that step is as follows by weight:
(1) once stir: redispersable latex powder 1.0-1.8 part, powdery water reducer 0.1-0.8 part, rubber powder 1.9-5.7 part and PP fiber 0.8-2 part are added in stirrer and does stirring, and churning time is 2-3 minute, until these four kinds of base materials stir; Material pack by being stirred, obtains packed compound, transports to working-yard stand-by;
(2) secondary stirring: the packed compound of getting step (1) gained, add cement 19-36 part, flyash 11-40 Fen, river sand 12-35 part and stone 10-30 part, put First screw mixer into, stir and be delivered to second screw mixer, add water 7-18 part wet-mixing and be transported to wet-spraying machine;
(3) final set: the spray gun at wet-spraying machine is added accelerating chemicals 1-2.2 part in wet feed to, from lance ejection to crag on, initial set in 3-6 minute, final set in 10-14 minute, obtains product ejection-type ductility PP fiber reinforced cement-based composite material.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129949A (en) * | 2014-07-28 | 2014-11-05 | 河海大学 | Matrix for GFRP reinforced concrete crack control and manufacturing method thereof |
| CN106116365A (en) * | 2016-07-01 | 2016-11-16 | 成都特兰斯波交通科技有限公司 | A kind of high-toughness polypropylene fiber cement composites |
| WO2017000088A1 (en) * | 2015-06-29 | 2017-01-05 | 北京大陆益通环保科技有限公司 | Rubber composite material and composite panel made from said material, and panel process |
| CN106316304A (en) * | 2016-08-02 | 2017-01-11 | 福州美创美工艺品有限公司 | Cement products and preparation methods thereof |
| CN107324686A (en) * | 2017-07-27 | 2017-11-07 | 君旺节能科技股份有限公司 | A kind of gunite concrete additive |
| CN108358564A (en) * | 2018-05-11 | 2018-08-03 | 江南大学 | A kind of high ductility cement-base composite material and preparation method thereof |
| CN110668764A (en) * | 2019-11-21 | 2020-01-10 | 吉林大学 | Formula and preparation technology of domestic polypropylene fiber cement-based material |
| CN110734261A (en) * | 2019-10-31 | 2020-01-31 | 中建材料技术研究成都有限公司 | high-toughness cement-based composite material for injection and preparation method thereof |
| CN111533505A (en) * | 2020-04-13 | 2020-08-14 | 上海二十冶建设有限公司 | High-ductility concrete floor material and preparation method thereof |
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| CN1030355A (en) * | 1987-07-07 | 1989-01-18 | 浙江医科大学附属第二医院 | Abdominal is put the pipe box pin |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1030355A (en) * | 1987-07-07 | 1989-01-18 | 浙江医科大学附属第二医院 | Abdominal is put the pipe box pin |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129949A (en) * | 2014-07-28 | 2014-11-05 | 河海大学 | Matrix for GFRP reinforced concrete crack control and manufacturing method thereof |
| CN104129949B (en) * | 2014-07-28 | 2016-06-01 | 河海大学 | A kind of matrix for GFRP reinforced concrete Crack Control and making method thereof |
| WO2017000088A1 (en) * | 2015-06-29 | 2017-01-05 | 北京大陆益通环保科技有限公司 | Rubber composite material and composite panel made from said material, and panel process |
| CN106116365A (en) * | 2016-07-01 | 2016-11-16 | 成都特兰斯波交通科技有限公司 | A kind of high-toughness polypropylene fiber cement composites |
| CN106316304A (en) * | 2016-08-02 | 2017-01-11 | 福州美创美工艺品有限公司 | Cement products and preparation methods thereof |
| CN107324686A (en) * | 2017-07-27 | 2017-11-07 | 君旺节能科技股份有限公司 | A kind of gunite concrete additive |
| CN108358564A (en) * | 2018-05-11 | 2018-08-03 | 江南大学 | A kind of high ductility cement-base composite material and preparation method thereof |
| CN110734261A (en) * | 2019-10-31 | 2020-01-31 | 中建材料技术研究成都有限公司 | high-toughness cement-based composite material for injection and preparation method thereof |
| CN110668764A (en) * | 2019-11-21 | 2020-01-10 | 吉林大学 | Formula and preparation technology of domestic polypropylene fiber cement-based material |
| CN111533505A (en) * | 2020-04-13 | 2020-08-14 | 上海二十冶建设有限公司 | High-ductility concrete floor material and preparation method thereof |
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| CN103508705B (en) | 2016-05-04 |
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