CN1544375A - Polypropylene fibre cement mortar and its production method - Google Patents
Polypropylene fibre cement mortar and its production method Download PDFInfo
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- CN1544375A CN1544375A CNA2003101109408A CN200310110940A CN1544375A CN 1544375 A CN1544375 A CN 1544375A CN A2003101109408 A CNA2003101109408 A CN A2003101109408A CN 200310110940 A CN200310110940 A CN 200310110940A CN 1544375 A CN1544375 A CN 1544375A
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Abstract
The invention discloses a polypropylene fiber cement grout whose constituents includes, water-cement ratio 0.35-0.45, the glue sand ratio 1:0.5 - 1:1.2, the content of highly effective swelling agent in the cement consumption is 8%-10%, the content of high efficiency water reducing agent in the cement consumption is 0.5%-1%, and the content of polypropylene fiber is 0.8-1.2kg per cubic meter sand grout. The invention also discloses the process of preparation.
Description
Technical field
The present invention relates to a kind of sand-cement slurry, relate in particular to a kind of PP fiber reinforced cement mortar, also relate to the production method of this PP fiber reinforced cement mortar simultaneously.
Background technology
The prestress anchoraging injection material mainly contains following several at present:
(1) the superfine cement median size developed is 4 μ m the enforcement period of the seventh five-year plan, and specific surface area is at 800cm
2More than/the g, can be used for pouring into the rock fracture that width is 0.06mm.
(2) develop wet-milling cement; Can have good bleed stability than Portland cement with using with mill, higher impermeability and mechanical strength, concrete castability greatly improves.
(3) developed modification Grouting Cement material: be characterized in optimizing the gradation composition of cement granules, do not pursue the particulate fineness merely.
(4) used stable high slurries: at water cement ratio is 1.5～0.28, and viscosity is 0.1～0.9Pa.s, and yield strength is in the scope of 10～49Mpa, has grasped physics, mechanical property and the corresponding grouting process of this slurries calculus.
(5) epoxy resin grouting: develop the WJ88 slurry material that is used under the high aqueous conditions, comprise WJ88-1 slurries properties-correcting agent and WJ88-2 stratum pretreating agent and corresponding construction technology.
(6) urethane grouting: succeed in developing oiliness urethane slurry material, elastane, HW and LW aqurous ployurethane slurry material.
(7) acrylate injection material: it is that a kind of viscosity of developing the nineties in last century is low, accumulating good stability, barrier performance height, change filling material that anti-plasticating capacity is strong.
(8) non-alkaline water glass grout: China begins to develop non-alkaline sodium silicate grout the eighties in 20th century, develops new modified slurries the nineties.Select for use two or more acid materials that water glass is carried out acidification, and add properties-correcting agent as required, its gel time can accurately be controlled, and intensity and stability greatly improve.
Though above injection material possesses certain advantage, its over-all properties is not ideal,
Summary of the invention
The object of the present invention is to provide a kind of anti-folding, resistance to compression, tensile strength height, fragility is little, and resistance to cleavage is good; Impervious good; The high-strength prestressed anchor grouting material PP fiber reinforced cement mortar that bonding shearing resistance and bond stress intensity are big.
Another object of the present invention is to provide the production method of this PP fiber reinforced cement mortar.
PP fiber reinforced cement mortar of the present invention, it is composed as follows:
Water cement ratio: 0.35～0.45;
Cement mortar rate: 1: 0.5～1: 1.2;
High-efficiency expanding agent content is: 8%～10% of cement consumption;
High efficiency water reducing agent content is: 0.5%～1% of cement consumption;
Polypropylene fibre content: 1m
3Admixture 0.8～1.2kg in the mortar.
The cement of cement of the present invention preferred 42.5 and above label, medium sand in the sand of the preferred river of sand, the efficient concrete swelling agent of the preferred UEA-H of high-efficiency expanding agent, the preferred naphthalene series high-efficiency water-reducing agent FDN of high efficiency water reducing agent, the olefin fibre that polypropylene fibre preferred propylene polymers or multipolymer are made, length are between 10mm～19mm.
The production method of a kind of PP fiber reinforced cement mortar of the present invention comprises the steps:
(1) raw materials weighing according to the above ratio;
(2) with sand, fiber, cement and high-efficiency expanding agent dry mixing together, the time is 1～3 minute;
(3) add water then and begin to stir, add high efficiency water reducing agent subsequently and stir together, 3～5 minutes time, promptly get PP fiber reinforced cement mortar of the present invention.
The present invention compares with existing sand-cement slurry has tangible advantage and effect.By above technical scheme as can be known, the present invention has the following advantages:
1) after mortar is mixed the polypropylene fibre modification, each age strength (anti-folding/resistance to compression) all has raising in various degree, mix 28 days anti-foldings and the average relative raising 3% and about 5% of ultimate compression strength of fiber slurry calculus, but it is more that the anti-folding in length of time morning (3 days) and ultimate compression strength on average improve, and is respectively 19.5% and 11%.
2) fiber of all lengths specification improves the degree difference to pulp strength, and macrofiber (19mm) is obvious relatively to the influence of gain in strength, 28 days intensity (anti-folding/resistance to compression) increase intensity raising in 7% and 11%, 3 day than ordinary mortar and reach 30% and 22%.
3) polypropylene fibre is applied to the cracking that mortar can reduce mortar, strengthens water-proof function, and the anti-cracking waterproof function of fibre mortar is extremely important to prestress anchoraging, can effectively strengthen corrosionproof protection and the prestressed loss of minimizing to anchor pole.
4) its bonding shearing resistance and reinforcing bar bond stress there is the improvement effect after mixing fiber in the slurry.The increased value maximum of bonding shearing resistance and bond strength reaches more than 20%, and fiber is long more, and its improved performance effect is good relatively more.Test-results shows that with the increase of fibers content, the also non-linear change that is of the improvement of slurry performance is when fibers content reaches 0.9kg/m
3The time, these two index comprehensive best results.
5) fibre mortar is compared with ordinary mortar, and the tensile splitting strength of fibre mortar is the height than ordinary mortar, when fibers content is 0.9Kg/m
3The time, the tensile splitting strength of fibre mortar increases by 18% than the tensile splitting strength of ordinary mortar.
6) bonding shear strength of mortar and rotary rock drill hole wall is the important computations index of prestress anchoraging, mix fiber in the evidence slurry after, the circular hole bonding shear strength of mortar and drill hole wall has obviously and increases.The cohesive strength of ordinary mortar and fibre mortar and drill hole wall all increases with the length of time, and fibre mortar all had obviously than the bonding shear strength of ordinary mortar and drill hole wall with the bonding shear strength of drill hole wall and increased in the length of time each; Evidence: concrete and mortar bonding intensity, when fibers content is 0.9Kg/m
3The time, 7 days intensity increased increase in about 21%, 28 day and reaches 27% much at one in 14 days; Limestone rock and mortar bonding intensity are when fibers content is 0.9Kg/m
3The time, the cohesive strength of 7 days fiber cement mortars increases about 16%, 14 day fiber cement mortar than conventional cement mortar cohesive strength increases about 21% than the cohesive strength that conventional cement mortar increases about 19%, 28 day fiber cement mortar than conventional cement mortar.The presentation of results fibre mortar is applied to the anchoring property that prestress anchoraging can improve traditional mortar greatly, increases anchor force, can reduce anchoring section length in fibre mortar prestress anchoraging design calculation, reduces engineering cost.
7) the polypropylene fibre mortar can improve the fracture toughness property of mortar, and the ultimate elongation rate is higher by 6%～16% than ordinary mortar, and Young's modulus is low by 5%～13%, and toughness index is high by 21%～35%.
8) the polypropylene fibre mortar has simple, the easy to use advantage of pulping process.
Embodiment
Embodiment 1:
With sand 200kg, length is 19mm polypropylene fibre 0.26kg, PO 42.5 cement 200kg and the efficient concrete swelling agent of pale powder shape UEA-H 20kg dry mixing together, and the time is 3 minutes; Add water 90kg then and begin to stir, add liquid naphthalene series high-efficiency water-reducing agent FDN 5kg subsequently and stir together, 5 minutes time, promptly get PP fiber reinforced cement mortar of the present invention.
Embodiment 2:
With sand 150kg, length is 15mm polypropylene fibre 0.26kg, PO 42.5 cement 200kg and the efficient concrete swelling agent of pale powder shape UEA-H 20kg dry mixing together, and the time is 2 minutes; Add water 84kg then and begin to stir, add liquid naphthalene series high-efficiency water-reducing agent FDN 5kg subsequently and stir together, the time is 4 minutes, promptly gets PP fiber reinforced cement mortar of the present invention.
Embodiment 3:
With sand 100kg, length is 10mm polypropylene fibre 0.26kg, PO 42.5 cement 200kg and the efficient concrete swelling agent of pale powder shape UEA-H 20kg dry mixing together, and the time is 1 minute; Add water 74kg then and begin to stir, add liquid naphthalene series high-efficiency water-reducing agent FDN 5kg subsequently and stir together, the time is 3 minutes, promptly gets PP fiber reinforced cement mortar of the present invention.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, any technical solution of the present invention content that do not break away from,, all still belong in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (4)
1, a kind of PP fiber reinforced cement mortar, it is composed as follows:
Water cement ratio: 0.35～0.45;
Cement mortar rate: 1: 0.5～1: 1.2;
High-efficiency expanding agent content is: 8%～10% of cement consumption;
High efficiency water reducing agent content is: 0.5%～1% of cement consumption;
Polypropylene fibre content: 1m
3Admixture 0.8～1.2kg in the mortar.
2, PP fiber reinforced cement mortar as claimed in claim 1, the olefin fibre made of polypropylene fibre preferred propylene polymers or multipolymer wherein, length is between 10mm～19mm.
3, PP fiber reinforced cement mortar as claimed in claim 1 or 2, wherein cement mark be 42.5,42.5R, 52.5 or 52.5R, sand is the medium sand in the sand of river, and high-efficiency expanding agent is the UEA-H high-efficiency concrete expansion admixture, and high efficiency water reducing agent is naphthalene series high-efficiency water-reducing agent FDN.
4, the production method of the described PP fiber reinforced cement mortar of claim 3 comprises the steps:
(1) by the said ratio raw materials weighing;
(2) with sand, fiber, cement and high-efficiency expanding agent dry mixing together, the time is 1～3 minute;
(3) add water then and begin to stir, add high efficiency water reducing agent subsequently and stir together, 3～5 minutes time, promptly get PP fiber reinforced cement mortar of the present invention.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310110940 CN1218895C (en) | 2003-11-13 | 2003-11-13 | Polypropylene fibre cement mortar and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310110940 CN1218895C (en) | 2003-11-13 | 2003-11-13 | Polypropylene fibre cement mortar and its production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1544375A true CN1544375A (en) | 2004-11-10 |
| CN1218895C CN1218895C (en) | 2005-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310110940 Expired - Fee Related CN1218895C (en) | 2003-11-13 | 2003-11-13 | Polypropylene fibre cement mortar and its production method |
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| CN (1) | CN1218895C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505944A (en) * | 2011-10-25 | 2012-06-20 | 中煤第五建设有限公司 | Water sealing method for replacing mud in freezing holes with slow setting cement grout |
| CN102705593A (en) * | 2012-06-29 | 2012-10-03 | 山东龙泉管道工程股份有限公司 | Embedded prestress steel cylinder concrete pipe subjected to comprehensive antiseptic treatment |
| CN103482907A (en) * | 2012-12-31 | 2014-01-01 | 中交四航工程研究院有限公司 | Production method for high-crack-resistance concrete |
| CN103864368A (en) * | 2014-02-23 | 2014-06-18 | 谷苗苗 | Method for preparing cement mortar |
| CN104609794A (en) * | 2014-02-23 | 2015-05-13 | 谷苗苗 | Preparation method for cement mortar with cement strengthening agent |
| CN106673541A (en) * | 2016-11-29 | 2017-05-17 | 中铁十六局集团北京轨道交通工程建设有限公司 | Grouting material for surge prevention in mylonite crushing zone shield construction and preparation method thereof |
| CN107417182A (en) * | 2017-07-18 | 2017-12-01 | 中原工学院 | Intumescent high polymer cement mortar, grouting and reinforcing device and grouting strengthening method |
| CN108716410A (en) * | 2018-05-21 | 2018-10-30 | 宁波大学 | Mechanical Method service channel high-strength elastic grouting behind shaft or drift lining slurries and grouting method |
| CN110467406A (en) * | 2019-09-23 | 2019-11-19 | 中国十七冶集团有限公司 | A kind of microdilatancy waterproof mortar and preparation method thereof |
| CN111409197A (en) * | 2020-03-11 | 2020-07-14 | 安吉龙港混凝土制品有限公司 | New method and equipment for preparing polypropylene fiber concrete |
-
2003
- 2003-11-13 CN CN 200310110940 patent/CN1218895C/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505944A (en) * | 2011-10-25 | 2012-06-20 | 中煤第五建设有限公司 | Water sealing method for replacing mud in freezing holes with slow setting cement grout |
| CN102505944B (en) * | 2011-10-25 | 2014-08-13 | 中煤第五建设有限公司 | Water sealing method for replacing mud in freezing holes with slow setting cement grout |
| CN102705593A (en) * | 2012-06-29 | 2012-10-03 | 山东龙泉管道工程股份有限公司 | Embedded prestress steel cylinder concrete pipe subjected to comprehensive antiseptic treatment |
| CN103482907B (en) * | 2012-12-31 | 2016-01-20 | 中交四航工程研究院有限公司 | Production method for high-crack-resistancconcrete concrete |
| CN103482907A (en) * | 2012-12-31 | 2014-01-01 | 中交四航工程研究院有限公司 | Production method for high-crack-resistance concrete |
| CN104609794B (en) * | 2014-02-23 | 2016-08-24 | 广州市东浦建材有限公司 | A kind of preparation method of the cement mortar being added with cement intensifier |
| CN103864368B (en) * | 2014-02-23 | 2015-05-13 | 中城建第十三工程局有限公司 | Method for preparing cement mortar |
| CN104609794A (en) * | 2014-02-23 | 2015-05-13 | 谷苗苗 | Preparation method for cement mortar with cement strengthening agent |
| CN103864368A (en) * | 2014-02-23 | 2014-06-18 | 谷苗苗 | Method for preparing cement mortar |
| CN106673541A (en) * | 2016-11-29 | 2017-05-17 | 中铁十六局集团北京轨道交通工程建设有限公司 | Grouting material for surge prevention in mylonite crushing zone shield construction and preparation method thereof |
| CN106673541B (en) * | 2016-11-29 | 2019-04-09 | 中铁十六局集团北京轨道交通工程建设有限公司 | Mylonite crushed zone shield-tunneling construction protrusion-dispelling gushes injecting paste material and preparation method thereof |
| CN107417182A (en) * | 2017-07-18 | 2017-12-01 | 中原工学院 | Intumescent high polymer cement mortar, grouting and reinforcing device and grouting strengthening method |
| CN107417182B (en) * | 2017-07-18 | 2020-10-30 | 中原工学院 | Expansion type high polymer cement slurry, grouting reinforcement device and grouting reinforcement method |
| CN108716410A (en) * | 2018-05-21 | 2018-10-30 | 宁波大学 | Mechanical Method service channel high-strength elastic grouting behind shaft or drift lining slurries and grouting method |
| CN108716410B (en) * | 2018-05-21 | 2020-05-05 | 宁波大学 | Mechanical method connecting channel high-strength elastic wall post-grouting slurry and grouting method |
| CN110467406A (en) * | 2019-09-23 | 2019-11-19 | 中国十七冶集团有限公司 | A kind of microdilatancy waterproof mortar and preparation method thereof |
| CN111409197A (en) * | 2020-03-11 | 2020-07-14 | 安吉龙港混凝土制品有限公司 | New method and equipment for preparing polypropylene fiber concrete |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1218895C (en) | 2005-09-14 |
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