Bonded PC Strand

1.Introductions: Txij li thaum xyoo 2005 cov khoom ntawm stabilized reinforcement strands / pc strands nrog tsawg so tau tsim. Hauv xyoo 2016, lub tuam txhab tau muab tso rau hauv kev ua haujlwm tshiab cov cuab yeej siv niaj hnub uas tso cai rau tsim cov khoom siv dag zog kom ruaj khov txog li 300,000 tons hauv ib xyoos.

Cov thev naus laus zis tshiab tshaj plaws uas ua tau raws li tus neeg yuav khoom xav tau ntawm cov txheej txheem uas twb muaj lawm

kev tswj kom zoo yog siv nyob rau hauv cov strands ntau lawm.

2.Applications: PC strands / Reinforcement stabilized strands yog tsim nrog ntau yam ntawm daim ntawv thov ntawm kev tsim cov khoom loj: cov tsev, cov qauv, txuas hniav, conduits, reservoir, tshav dav hlau, tunnels hangars, roj-drilling platforms, nuclear fais fab mov; ntawm kev tsim cov pob zeb railway sleepers.

3.Advantageous: PC strands / Reinforcement stabilized strands muaj qhov ua tau zoo ntawm kev so siab thiab ductility, uas muaj ntau yam kev siv hauv kev tsim kho ntawm txoj kev lag luam thiab lub luag haujlwm thiab cov chaw tsim khoom.

1) Daim ntawv thov ntawm ntau cov hlau reinforcement stabilized strands tso cai rau ua tiav tib lub zog nyob rau hauv prestressed kev tsim kho yam tsis tau nce txoj kab uas hla thiab tus naj npawb ntawm strands nrog pom tseeb kev lag luam ntawm tus account ntawm lawv fastening ntawm lub anchors.

2) Cov yam ntxwv zoo ntawm cov cuab yeej siv zog ntxiv tom qab kev kho cua sov thiab kev kho tshuab tsis tu ncua ntawm cov thev naus laus zis muaj qhov tseem ceeb hauv kev siv cov khoom siv hlau hauv kev lag luam hauv tsev thiab ua cov hlua txuas ntxiv rau cov kev tsim vaj tsev prestressed los ntawm ib qho ntawm cov khoom tseem ceeb.

4.Cov yam ntxwv: Kev siv ntau txoj hlua khi hlua khi es tsis txhob dov qhov cuab lub zog tso cai rau kom tau txais cov yam ntxwv ntawm lub zog siab nrog cov kab me me thiab qhov hnyav ntawm cov qauv kev txhawb nqa. Kev hloov pauv ntawm cov strands zoo heev pab txhawb kev tsim thiab kev tsim cov txheej txheem nyuaj.

5.Standards: PC strands / Reinforced stabilized strands yog ua raws li cov kev cai ntawm cov qauv hauv qab no:

1) PC strands raws li FprEN 10138-3: 2009 "Tensile reinforcement - Ntu 3: Strand" - raws li tus qauv tsim 3- thiab 7-strands los ntawm cov hlau puag ncig lossis ntu ntu ntu;

2) PC strands raws li BS 5896: 2012 "Steel hlau nrog siab tensile lub zog ib ntus thiab strands los ntawm nws los tsim prestress nyob rau hauv qhob Strands";

3) PC strands raws li ASTM A 416 / A416M-18 "Txoj kev qhia tshwj xeeb rau 7-xaim steel strands tsis muaj txheej rau prestressed pob zeb". Los ntawm ib tug hlau ntawm tsuas yog puag ncig seem;

4) PC strands (txhim kho hlua) raws li GOST 13840-68 "Steel reinforcing ropes 1 × 7. Technical tej yam kev mob”;

5) PC strands (txhim kho cov hlua) raws li GOST R 53772-2010 "7-xaim stabilized reinforcing steel ropes. Technical tej yam kev mob."

6) PC reinforcement stabilized strands (ropes) raws li SFS - 1265 - 3: 2014 "Prestressing steels prestressed constructions - Ntu 3: Strand"

6. PC Strands raws li kev soj ntsuam kev lag luam hauv teb chaws raws li EN 10138, ntu 1 thiab 3:

1) Romanian technical regulation ST 009-2011 "Technical specifications for steel products use as reinforcement: operational requirements and criteria" thiab Technical agreement 001SC-01 / 275-2019 "Reinforceing strand for prestressed concrete"

2) Polish lub teb chaws kev ntsuam xyuas ITB-KOT-2018/0637 qhov teeb meem 1 "Steel prestressed strands ntawm PJSC "STALKANAT-SILUR" los ntawm cov xov hlau du ";

3) Hungarian National Technical Assessment NMÉ: A-16/2018 thiab NMÉ: A-27/2019;

DIAMETER: los ntawm 6,50 mm mus rau 17,8 mm.

STRUCTURE: 3-strands hlau thiab 7-strands hlau txheej los yog tsis muaj txheej.

RAW MATERIAL: txias-daws hlau, ua los ntawm high carbon hlau pas nrig ntawm txoj kab uas hla 6,5 ​​~ 13,0 hli yog siv rau cov reinforcement strands ntau lawm.

Cov cuab yeej siv niaj hnub tshiab, lub chaw kuaj sim tau nruab rau kev sim cov qauv thiab cov khoom tshwj xeeb, cov kws paub txog kev paub txog kev lees paub qhov kev txaus siab ntawm txhua qhov kev thov thiab kev cia siab ntawm cov neeg siv khoom.

Raws li qhov kev thov ntawm cov neeg siv khoom, cov strands tuaj yeem ua los ntawm cov xaim indented, thaum lub hauv paus xaim hauv cov strand yog ua kom du. 7-xaim / 3-xaim strands tuaj yeem ua los ntawm cov xaim du thiab los ntawm cov xaim indented.