CN1086367C - Fine PP fiber reinforced cement based composite material, and use thereof - Google Patents

Fine PP fiber reinforced cement based composite material, and use thereof Download PDF

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Publication number
CN1086367C
CN1086367C CN98103243A CN98103243A CN1086367C CN 1086367 C CN1086367 C CN 1086367C CN 98103243 A CN98103243 A CN 98103243A CN 98103243 A CN98103243 A CN 98103243A CN 1086367 C CN1086367 C CN 1086367C
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China
Prior art keywords
fine
cement
fiber reinforced
composite material
based composite
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Expired - Fee Related
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CN98103243A
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CN1242345A (en
Inventor
裴梅山
王笃金
胡先波
徐端夫
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Institute of Chemistry CAS
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Institute of Chemistry CAS
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00948—Uses not provided for elsewhere in C04B2111/00 for the fabrication of containers
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/34—Non-shrinking or non-cracking materials
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The present invention relates to superfine polypropylene fiber reinforced cement based composite material which comprises 100 portions of basal body, 0.005 to 0.5 portion of superfine polypropylene fiber and 0.01 to 0.1 portion of admixture by weight, wherein the cement basal body is a mixture of cement, sand, stone, superfine inorganic mineral powder and water; the filament size of the superfine polypropylene fiber is from 0.5 to 2.0 tax, and the length is from 3 to 50mm. The superfine polypropylene fiber reinforced cement based composite material of the present invention can be used in the fields of civil construction engineering, farmland water conservancy facilities and traffics, and is especially suitable for large-sized water facilities and storage tanks with high requirements on crack prevention and leakage resistance.

Description

Fine PP fiber reinforced cement based composite material and purposes
The present invention relates to a kind of fiber reinforced cement-based composite material, particularly a kind of PP fiber reinforced cement based composite material.
Cement produces contraction in aquation and drying process, cause cement-based material to produce the crack, causes its mechanical properties decrease, the anti-leakage poor performance.In cement-based material, mix people's fiber, can suppress fissured generation and development effectively, thereby improve the mechanical property of cement-based material.Asbestos are the inorganic mineral fibers that are used for the refinforced cement sill the earliest, but harmful because of it, now in the use that is under an embargo of many countries.Synthon are wide in variety because of it, and the source is easy to get and the substitute that is used as asbestos is come the refinforced cement sill, and synthon commonly used have vinylon, terylene, acrylic fibers, polyamide fibre, polypropylene fibre etc.
Polypropylene fibre (polypropylene fibre) is because of chemical stability is good, with low cost, is specially adapted to cement-based material toughness reinforcing of alkalescence and earns widespread respect.US3591395 and US4261754 disclose fibrillation polypropylene film refinforced cement sill and manufacture method thereof, are the fibrillation polypropylene films owing to what be used for toughness reinforcing cement-based material, be difficult for being uniformly dispersed, so the manufacturing process complexity, the equipment requirements harshness.CN1152054 and US5456752 disclose " polypropylene fibre used for preventing cement from cracking " and " joining a grade fiber reinforced cement-based material " respectively, and used polypropylene fibre is regular staple and thick dawn staple fibre (filament number is respectively 6.6dtex and 15-3000dtex).Also there is the patent report of some PP fiber reinforced cement based materials in Japan in recent years.But the used polypropylene fibre in various countries all be in the conventional fibre at thick dawn.The polypropylene microfibre GB that the present invention invents with us (11)2258869 (13)B, Chinese patent application numbers 95119564.5 and 96114163.8) as the toughness reinforcing thing of cement-base composite material, it should have more significant toughening effect by thicker conventional fibre.
The present invention has overcome the difficult dispersion of fibrillation polypropylene film in the prior art, construction technology complexity and forefathers can only adopt common in the limitation of thick denier polypropylene staple fibre, the fine PP fiber that utilizes the patented technology that we invent (Chinese patent application number 95119564.5 and 96114163.8) to make comes the refinforced cement sill, makes a kind of ultimate compression strength and anti-permeability performance and the better PP fiber reinforced cement based composite material of other mechanical property.
PP fiber reinforced cement based material belongs to a kind of of matrix material, and is thin more as the polypropylene fibre of strongthener, and reinforced effects is good more.Under the situation of identical addition content, compare with the plain polypropylene fiber, the fine PP fiber has big specific surface area, and the ability of transmitting the stress that forms in the cement solidification process is also big more, prevents or slows down that cement-based material crack produces and the effect of development is good more.
Fine PP fiber reinforced cement based composite material of the present invention comprises following component and content (weight hundred umbers)
Cement matrix 100
Fine PP fiber 0.005～0.5
Admixture 0.01～0.1
Above-mentioned cement matrix is the mixture of cement, sand, water, or the mixture of cement, sand, stone, water, or the mixture of cement, sand, inorganic mineral powder, water, or the mixture of cement, sand, stone, inorganic mineral powder, water.Filament number 0.5～the 2.0dtex of above-mentioned fine PP fiber, fibre strength 4.5cN/dtex, Young's modulus 9GPa, length 3～50mm.
The present invention adds 100 parts of cement matrixes, 0.005～0.5 part of fine PP fiber, admixture in the glue sand agitator for 0.01～0.1 part, by stirring the fine PP fiber is dispersed in the cement matrix, obtains having the slurry of certain degree of mobilization, then jolt ramming, moulding, maintenance.
Fine PP fiber reinforced cement based material of the present invention because of the fine PP fiber is easy to disperse, has reduced the requirement of mix equipment, has simplified preparation technology.The concrete performance of fine PP fiber reinforced cement based material table 1 of the present invention relatively
Performance Fine PP fiber reinforced concrete (embodiment 1) Plain concrete (Comparative Examples 1) Plain polypropylene fiber reinforced concrete (Comparative Examples 2)
Ultimate compression strength (MPa) 28 days * 38.2 36.8 37.2
Folding strength (MPa) 28 days * 5.1 4.3 4.7
Impervious (cm) # 9.1 13.8 10.6
Drying shrinkage * 10 -428 days # 2.28 2.84 2.41
Annotate: *Performance test methods is all undertaken by GBJ81-85; The # performance test methods is all undertaken by GBJ82-85.Material is except that resistance to impact shock, ultimate compression strength, folding strength, the more plain cement-based material of freezing and thawing performance and plain polypropylene fiber reinforced cement-based material are significantly increased, and anti-permeability performance improves a lot.Table 1 is the comparison that fine PP fiber reinforced concrete and plain concrete, plain polypropylene fiber (filament number 6.6dtex) strengthen concrete ultimate compression strength, folding strength, impervious and shrinkage performance.
Fig. 1 be fine PP fiber reinforced cement mortar and plain sand-cement slurry, plain polypropylene fiber (filament number 6.6dtex) refinforced cement mortar anti-permeability performance relatively.
The mortar anti-permeability performance is tested by the following method: molding demoulding after a day, become the scale glass tube of three internal diameter Φ 15mm of " product " font handstand at the cement bonded sand lumps, with adhesive glass tube is bonded on the cement mortar block, and guarantees that the junction is water-tight. Three glass tubes of bonding on each cement bonded sand lumps. After the molding the 3rd day add the water column of equal height in the glass tube, then measure the height of water column in each glass tube every a period of time, and average. Water column is higher in the cement bonded sand lumps upper glass pipe, illustrates that the impermeability of this cement bonded sand lumps is better.
Fine PP fiber reinforced cement based composite material of the present invention can be used for civil construction project, farm irrigation facility, field of traffic, is particularly useful for massive water projects and storage tank that anti-cracking, anti-leakage are had relatively high expectations.
Embodiment 1: with proportioning is water cement ratio 0.42, cement: sand: stone=1: 1.575: 2.925, sand coarse aggregate ratio are 35%, naphthalene water reducer 0.02%, fine PP fiber 0.1%, cement consumption 400Kg/m 3The raw material mix together, make the fine PP fiber dispersion even, vibratory compaction on shaking table, the demoulding after 24 hours, 20～25 ℃ of following natural curings, 28 days concrete ultimate compression strength and permeated height are respectively 38.2MPa and 9.1cm.
Embodiment 2:540g cement, 200ml water, 3.5g naphthalene water reducer, 1350g standard sand, 1g fine PP fiber mix in the glue sand agitator, make the fine PP fiber dispersion even, can make the mortar of degree of mobilization more than 135mm, vibratory compaction on shaking table, the water maintenance is put in the demoulding after 24 hours.28 days ultimate compression strength, 72 hours water colunm heights are respectively 53.2MPa, 4.0cm, and ultimate compression strength, the water colunm height of corresponding plain sand-cement slurry and plain polypropylene fiber reinforced cement mortar are divided into 52.6MPa, 0.1cm and 49.3MPa, 2.3cm.
Embodiment 3:486g cement, 54g flyash, 200ml water, 3.5g naphthalene water reducer, 1350g standard sand, 1g fine PP fiber mix in the glue sand agitator, make the fine PP fiber dispersion even, can make the mortar of degree of mobilization more than 140mm, vibratory compaction on shaking table, the water maintenance is put in the demoulding after 24 hours.28 days ultimate compression strength, 72 hours water colunm heights are respectively 43.1MPa, 3.8cm, and ultimate compression strength, the water colunm height of corresponding plain sand-cement slurry and plain polypropylene fiber reinforced cement mortar are respectively 41.32MPa, 0cm and 39.9MPa, 1.8cm.
Comparative Examples 1: with proportioning is water cement ratio 0.42, cement: sand: stone=1: 1.575: 2.925, sand coarse aggregate ratio are 35%, naphthalene water reducer 0.02%, cement consumption 400Kg/m 3The raw material mix together, vibratory compaction on shaking table, the demoulding after 24 hours, 20～25 ℃ of following natural curings, 28 days concrete ultimate compression strength and permeated height are respectively 36.8MPa and 13.8cm.
Comparative Examples 2: with proportioning is water cement ratio 0.42, cement: sand: stone=1: 1.575: 2.925, sand coarse aggregate ratio are 35%, naphthalene water reducer 0.02%, plain polypropylene fiber 0.1%, cement consumption 400Kg/m 3The raw material mix together, polypropylene fibre is uniformly dispersed, vibratory compaction on shaking table, the demoulding after 24 hours, 20～25 ℃ of following natural curings, 28 days concrete ultimate compression strength and permeated height are respectively 37.2MPa and 10.6cm.

Claims (4)

1. fine PP fiber reinforced cement based composite material is characterized in that described matrix material comprises following component and content (parts by weight):
Cement matrix 100
Fine PP fiber 0.005～0.5
The filament number of admixture 0.01～0.1 described fine PP fiber is 0.5～2.0dtex, and cement matrix is the mixture that contains cement, sand, stone, ultra-fine inorganic breeze, water.
2. fine PP fiber reinforced cement based composite material according to claim 1, the filament length that it is characterized in that described fine PP fiber is 3～50mm.
3. the purposes of fine PP fiber reinforced cement based composite material according to claim 1 is characterized in that being applicable to civil construction project, farm irrigation facility, field of traffic.
4. the purposes of fine PP fiber reinforced cement based composite material according to claim 3 is characterized in that being applicable to massive water projects and the storage tank that anti-cracking, anti-leakage are had relatively high expectations.
CN98103243A 1998-07-17 1998-07-17 Fine PP fiber reinforced cement based composite material, and use thereof Expired - Fee Related CN1086367C (en)

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Application Number Priority Date Filing Date Title
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CN1086367C true CN1086367C (en) 2002-06-19

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1116241C (en) * 2000-04-26 2003-07-30 中国纺织大学化纤科技开发部 Modified polypropene staple for concrete and mortar
ES2245333T3 (en) * 2001-08-31 2006-01-01 Hochtief Aktiengesellschaft CONSTRUCTION ELEMENT OF CONCRETE CONCRETE AGAINST FIRE ACTION.
CN100348528C (en) * 2003-09-19 2007-11-14 同济大学 Anticrack waterproof agent for cement-base material
CN101570425B (en) * 2009-06-08 2012-03-07 西安建筑科技大学 Organic fiber reinforced inorganic geopolymer composite cementitious material and preparation method thereof
CN101979774A (en) * 2010-10-15 2011-02-23 东南大学 Partial external prestressed and fine-grain reinforcing steel bar fiber reinforced cementitious composite (FRCC) railway box girder
CN102503286A (en) * 2011-11-11 2012-06-20 无锡市宏帆电器科技有限公司 Concrete composite material and preparation method thereof
CN104876498A (en) * 2015-04-08 2015-09-02 重庆千向建材有限公司 Light-weight energy-saving partition wall slat and manufacturing method thereof
CN106013725A (en) * 2016-05-13 2016-10-12 中建三局集团有限公司 Preparation method of novel cement base terrazzo floor
CN109776045A (en) * 2018-12-16 2019-05-21 中铁十八局集团有限公司 A kind of bentonite condensation compensation mortar

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1151410A (en) * 1995-11-24 1997-06-11 中国科学院化学研究所 Fine denier and super-fine denier polypropylene alloy fibre and its prodn. method
CN1152054A (en) * 1996-09-28 1997-06-18 山东虎山实业集团有限公司 Polypropylene fibre used for preventing cement from cracking
CN1186129A (en) * 1996-12-27 1998-07-01 中国科学院化学研究所 Manufacture of polypropylene staple of thin denier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1151410A (en) * 1995-11-24 1997-06-11 中国科学院化学研究所 Fine denier and super-fine denier polypropylene alloy fibre and its prodn. method
CN1152054A (en) * 1996-09-28 1997-06-18 山东虎山实业集团有限公司 Polypropylene fibre used for preventing cement from cracking
CN1186129A (en) * 1996-12-27 1998-07-01 中国科学院化学研究所 Manufacture of polypropylene staple of thin denier

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