CN1403661A - Making process of manhole cover of polypropylene fiber reinforced concrete - Google Patents

Making process of manhole cover of polypropylene fiber reinforced concrete Download PDF

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Publication number
CN1403661A
CN1403661A CN 02138340 CN02138340A CN1403661A CN 1403661 A CN1403661 A CN 1403661A CN 02138340 CN02138340 CN 02138340 CN 02138340 A CN02138340 A CN 02138340A CN 1403661 A CN1403661 A CN 1403661A
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CN
China
Prior art keywords
manhole cover
polypropylene
polypropylene fiber
hours
fiber reinforced
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN 02138340
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Chinese (zh)
Inventor
蒋元海
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Individual
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Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN 02138340 priority Critical patent/CN1403661A/en
Publication of CN1403661A publication Critical patent/CN1403661A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B16/04—Macromolecular compounds
    • C04B16/06—Macromolecular compounds fibrous
    • C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B16/0625—Polyalkenes, e.g. polyethylene
    • C04B16/0633—Polypropylene
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Sewage (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

Polypropylene fiber with elastic modulus of 3000-8000 MPa is mixed with cement, sand, stone, water, additive, etc. and the mixture is fed to steel boarding, vibrated to form, steam cured for 3-10 hr or room temperature set for 12-72 hr before demolding, and cured naturally for 7-28 days to produce the manhole cover. On the inner side of the boarding, there is netted reinforcing steel bar. The manhole cover with polypropylene fiber has high crack resisting performance, high impact resistance, no rust corrosion and high durability.

Description

The preparation method of manhole cover of polypropylene fiber reinforced concrete
Technical field
The present invention relates to a kind of preparation method of concrete inspection well lid.
Background technology
In the prior art, the preparation method of steel fibrous concrete manhole cover is for to stir raw material such as steel fibre, cement, sand, stone, Concrete admixtures, water by a certain percentage, then with in the steel fibrous concrete feeding steel coaming plate for preparing and through vibration moulding, the demoulding after stream curing 3 hours～10 hours or greenhouse are parked 12 hours to 72 hours, carried out natural curing again 7 to 28 days, the inboard of described steel coaming plate is welded with the stiffener of fixed network trellis; Because the rupture strength modulus of elasticity lower, steel fibre of concrete self is bigger, cause the cracking resistance of well lid and shock resistance, fatigue performance relatively poor, and steel fibre extremely gets rusty easily, easily causing well lid to lay the back steel fibre gets rusty and expands, thereby concrete spalling is destroyed, and under the repeat function of the carload of big frequency, structure produce cracking in advance, thereby reduced its structure bearing capacity, shortened the application life of well lid.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of manhole cover of polypropylene fiber reinforced concrete, the fibrous material of the concrete inspection well lid of producing with this method can corrosion, and the cracking resistance of well lid and shock resistance are good.
Technical scheme of the present invention is: a kind of preparation method of polypropylene fiber concrete well lid is 3 * 10 with modulus of elasticity 3MPa～8 * 10 3The polypropylene fibre of MPa and cement, sand, stone, water, Admixture etc. are common to be stirred in the back feeding steel coaming plate and through vibration moulding, the demoulding after stream curing 3 hours～10 hours or greenhouse are parked 12 hours to 72 hours, carried out natural curing again 7 to 28 days, the inboard of described steel coaming plate is welded with the stiffener of fixed network trellis; It is characterized in that: the fiber that uses in the described concrete is the polypropylene fibre of low elastic modulus.
The present invention compared with prior art has following advantage:
Manhole cover of polypropylene fiber reinforced concrete, not only can improve the cracking resistance of well lid, behind admixture low elastic modulus fiber material, can improve the shock resistance of well lid greatly, thereby improve the durability of well lid, and the not corrosion of fibrous material of concrete manhole cover, in the application life of prolongation well lid, have good technical economic benefit.
The specific embodiment
A kind of preparation method of manhole cover of polypropylene fiber reinforced concrete is 3 * 10 with modulus of elasticity 3MPa～8 * 10 3The polypropylene fibre of MPa and cement, sand, stone, water, Admixture etc. are common to be stirred in the back feeding steel coaming plate and through vibration moulding, the demoulding after stream curing 3 hours～10 hours or greenhouse are parked 12 hours to 72 hours, carried out natural curing again 7 to 28 days, the inboard of described steel coaming plate is welded with the stiffener of fixed network trellis; It is characterized in that: the fiber that uses in the described concrete is the polypropylene fibre of low elastic modulus.
The filament number of described polypropylene fibre is 0.5dtex～3.0dtex, and filament length is 2cm～60cm.
The percentage by weight of the admixture of described polypropylene fibre in concrete is 0.2 ‰～1%.
Described polypropylene fibre is that in the following fiber one or more are compound:
(1) polypropylene fibre;
(2) modified polypropylene fiber;
(3) modification abnormity polypropylene fibre.
Embodiment one: 2 kilograms of the volumes of every cubic meter of concrete modified polypropylene fiber (percentage by weight is 0.8 ‰), press following match ratio (kilogram/cubic meter concrete):
Modified polypropylene fiber: cement: sand: stone: water: MD type high efficiency water reducing agent
2: 520: 580: stirring in 1180: 165: 6 was mixed with polypropylene fiber concrete, with in the polypropylene fiber concrete feeding steel coaming plate for preparing and through vibration moulding, natural curing demoulding after a day is positioned over the finished product stockyard then, water every day 2 times, maintenance was dispatched from the factory in 21 days.Test shows that the elastic modulus of concrete performance of well lid can improve more than 90%.
Embodiment two: 3 kilograms of the volumes (percentage by weight is 1.2 ‰) of every cubic meter of concrete modification abnormity polypropylene fibre, press following match ratio (kilogram/cubic meter concrete):
Modification abnormity polypropylene fibre: cement: sand: stone: water: MD type high efficiency water reducing agent
1: 520: 580: stirring in 1180: 165: 6 was mixed with polypropylene fiber concrete, with in the polypropylene fiber concrete feeding steel coaming plate for preparing and through vibration moulding, stream curing demoulding after 6 hours is positioned over the finished product stockyard then, water every day 2 times, maintenance was dispatched from the factory in 28 days.Test shows that the elastic modulus of concrete performance of well lid can improve more than 150%.

Claims (4)

1, a kind of preparation method of manhole cover of polypropylene fiber reinforced concrete is 3 * 10 with modulus of elasticity 3MPa～8 * 10 3The polypropylene fibre of MPa and cement, sand, stone, water, Admixture etc. are common to be stirred in the back feeding steel coaming plate and through vibration moulding, the demoulding after stream curing 3 hours～10 hours or greenhouse are parked 12 hours to 72 hours, carried out natural curing again 7 to 28 days, the inboard of described steel coaming plate is welded with the stiffener of fixed network trellis; It is characterized in that: the fiber that uses in the described concrete is the polypropylene fibre of low elastic modulus.
2, the preparation method of manhole cover of polypropylene fiber reinforced concrete according to claim 1 is characterized in that: the filament number of described polypropylene fibre is 0.5dtex～3.0dtex, and filament length is 2cm～60cm.
3, the preparation method of manhole cover of polypropylene fiber reinforced concrete according to claim 1 is characterized in that: the percentage by weight of the admixture of described polypropylene fibre in concrete is 0.2 ‰～1%.
4, the preparation method of manhole cover of polypropylene fiber reinforced concrete according to claim 1 is characterized in that: described polypropylene fibre is that in the following fiber one or more are compound:
(1) polypropylene fibre;
(2) modified polypropylene fiber;
(3) modification abnormity polypropylene fibre.
CN 02138340 2002-09-23 2002-09-23 Making process of manhole cover of polypropylene fiber reinforced concrete Pending CN1403661A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 02138340 CN1403661A (en) 2002-09-23 2002-09-23 Making process of manhole cover of polypropylene fiber reinforced concrete

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 02138340 CN1403661A (en) 2002-09-23 2002-09-23 Making process of manhole cover of polypropylene fiber reinforced concrete

Publications (1)

Publication Number Publication Date
CN1403661A true CN1403661A (en) 2003-03-19

Family

ID=4749425

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 02138340 Pending CN1403661A (en) 2002-09-23 2002-09-23 Making process of manhole cover of polypropylene fiber reinforced concrete

Country Status (1)

Country Link
CN (1) CN1403661A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103387375A (en) * 2012-05-08 2013-11-13 魏建利 Combined high-strength hydrophobic inspection well and preparation method thereof
CN105801034A (en) * 2016-06-02 2016-07-27 南京工程学院 Steel-fiber light-emitting-concrete maintenance well lid and production method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103387375A (en) * 2012-05-08 2013-11-13 魏建利 Combined high-strength hydrophobic inspection well and preparation method thereof
CN105801034A (en) * 2016-06-02 2016-07-27 南京工程学院 Steel-fiber light-emitting-concrete maintenance well lid and production method thereof
CN105801034B (en) * 2016-06-02 2018-02-23 南京工程学院 A kind of preparation method of the luminous concrete maintenance well lid of steel fibre

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