Bilong wanem 'Hooked-End Steel Fiber' i stap nambawan: Ol wok bilong wanpela 'hook'

Stori

Jun 15, 2012

Long wankain diamita na longpela, wanpela 'fiber' we i stap long tupela sait i save kamapim samting olsem 40% moa 'bond' winim wanpela stretpela 'fiber'. Huk i save tanim wanpela 'friction interface' i kamap 'friction' na tu 'mechanical anchorage'.

Wanpela Huk Em i Anka, Em i No Dekoresen

Pulim wanpela 'steel fiber' aut long simen i min olsem yu mas winim tupela samting: 'interfacial friction' na 'mechanical interlock'. Wanpela stretpela 'fiber' i gat 'friction' tasol, olsem na em i save stat long slip taim em i no gat planti hevi. Wanpela 'fiber' we i gat huk long tupela arere bilong en i mas stretim ol huk bilong en pastaim taim em i slip, na dispela i save kisim moa pawa, olsem na long wankain 'pull-out displacement' em i save karim moa hevi. Em i as tru: huk i save senisim wanpela 'friction interface' i go long 'friction' na 'anchorage'. Dispela i min tu olsem 'hook geometry', mining bilong 'hook longth', 'angle' na 'radius', em i bikpela samting moa long 'fiber diameter', na 'geometry' em i samting we ol samting we i no gat bikpela pe i no gat.

We 40% Bond Difrens i kam long en

Dispela tok olsem ol 'hooked fiber' i save pas gut moa long 40% winim 'straight fiber' em i wanpela 'pull-out test' risal, i no maketing. Insait long wankain 'matrix' long wankain 'embedment', wanpela stretpela 'fiber' i save go antap long wanpela milimita bilong slip na bihain i save pundaun hariap, na wanpela 'hooked fiber' i save go antap na i go daun isi isi. Sapos yu go daun isi isi dispela i min olsem yu kisim moa pawa pastaim long yu feil, we long sait i luk olsem i bruk tasol i sanap. Long dispela as, ol 'tunnel shotcrete', ol 'blast-resistant works' na ol 'seismic elements' i save yusim 'hooked fiber' klostu tasol: ol i nidim 'deformation capacity' pastaim long ol i bagarap, na i no bikpela 'compressive strength'.

0.55, 0.75 na 1.0 mm: Yusim Diamita

Tripela diamita, tripela wok. Long 0.55 mm dispela 'fiber' em i gutpela inap long ol 'aspect ratios' antap long 60, we i stret long ol liklik wol, ol 'self-compacting mixs' na bikpela 'dose'. Long 0.75 mm em i jenerel-pepos gret bilong ol plua, ol bris dek ovalei na ol prekast bim. Long 1.0 mm em i save karim bikpela hevi long wanwan 'fiber', long ol 'mass pours', 'heavy-duty floors' na ol 'case' we ol i senisim wanpela 'bar' we i tik moa. Rul i no tikpela em i gutpela tasol klia spesing: longpela bilong ol 'fiber' i mas stap aninit long tupela hap bilong 'minimum clear distance', sapos nogat ol 'fiber' i mas bruk na arch taim yu putim. Long wanpela 150 mm 'slab' wantaim antap na daunbilo 'mesh', klia spes i save stap 60 i go inap 80 mm tasol, we 50 mm longpela 0.75 mm 'fiber' i wok gut moa long 60 mm longpela 1.0 mm 'fiber'.

30, 35, 50 na 60 mm: Longpela i bihainim bikpela mak

Longpela em i no wanpela indipenden jois. Wantaim 20 mm maksimum agreget, longpela bilong 'fiber' i save stap 30 i go inap 40 mm; aninit long 10 mm agreget em inap long go antap long 50 o 60 mm. As bilong dispela em i isi: wanpela 'fiber' i mas i gat tripela taim bikpela bilong 'aggregate' bilong pasim ol liklik hap samting, tasol taim em i no inap moa long ol spes em i save go insait long en. Shotcrete em i narapela kain. Ol 'fiber' long 'nozzle' i mas pundaun wantaim win, olsem na 20 i go inap 30 mm em i nomol; longpela 'fiber' i save mekim 'rebound' i go antap.

Tenpela Drawing Pas: Bilong wanem strong i stap long 800-1150 MPa

Ol waia we i no gat planti kabon long en i save kisim strong long rot bilong wok strongim. Rod i save pasim moa long 10-pela 'die', ol 'grain' i save go longpela na kamap gutpela long 'axis', strong i save go antap long olgeta taim na 'ductility' i save go daun. I no gat planti pas na strong i no save kamap; planti tumas na i no gat 'intermediate annealing' na waia i save bruk bruk na bruk bihain long em i tanim tripela taim. Wanpela stebol lain i holim strong senis aninit long 5% na i no inap bruk bihain long tripela 'reverse bend'. Dispela tupela namba i tok moa long proses kontrol winim nominal strong, bikos ol i save toksave long 'breakage rate' taim ol i miksim. Ol 'fiber' we i bruk i save bagarapim ol samting na lusim ol sotpela 'stab' we i no strongim wanpela samting.

30-80 kg/m3 na mak tru bilong senisim ol 'mesh'

Ol 'steel fiber' inap long senisim 'welded mesh' tasol i no inap long senisim 'structural reinforcement', na ol i mas tok klia long lain. Mesh i save bosim tempereja na 'shrinkage cracking', we em i namba tu samting bilong strongim; 'steel fiber' long wankain mak i save givim gutpela 'three-dimensional restraint' na i save rausim wok bilong pasim, spesim na putim wok. Tasol ol i no inap rausim bikpela 'tension steel' insait long ol 'beam', 'column' na 'slab soffits', long wanem, 'randomly oriented fibre' i no gutpela tumas olsem 'oriented bar'. Komon kompromis em long senisim top mesh wantaim fiber, holim bottom main steel, o daunim bar diameter long wanpela o tupela milimita wantaim 30 i go long 80 kg/m3 dos.

Hau long sekim wanpela huk: bendim, skelim, brukim

Ol 'hooked-end waia' i save holim bikpela hap bilong 'structural steel fiber' maket, tasol wanpela 'hook' i no wankain olsem 'anchorage'. Tripela eksen i stretim dispela hevi long sait o insait long rum bilong sempel. Pastaim, bendim: kisim 10-pela rop, stretim wanpela huk wantaim 'pliers' na lusim, na huk i mas kalap i go bek long moa long hap bilong 'angle' bilong en pastaim. Nogut spring-bek i min olsem waia i gat bikpela 'yield-to-tensile ratio' tumas, olsem na huk i stret insait long miksa na i go insait long simen olsem waia tasol. Namba tu, skelim: longpela bilong huk em i save stap tupela o tripela taim moa long diamita bilong waia, angle bilong en em 45 o 90 digri, na tupela arere i ken lukluk long wankain o narapela sait, tasol wanpela 'batch' i mas wankain. Caliper tenpela 'fibers'; wanpela 'spread' antap long 10 pesen longpela bilong huk i min olsem ol 'forming dies' i bagarap pinis. Namba tri, bruk: wanpela 'ductile fiber' i save brukim nek bilong em pastaim long em i bruk, wanpela 'brittle' i save bruk, na wanpela 'flat break' i soim olsem em i no inap long tanim gut. Planti taim ol i save lusim wanpela liklik samting. Kopa leia i bruk pastaim long ben, olsem na tanim wanpela huk agensim lait; ol liklik tudakpela gras i min olsem ol i bin wokim huk na ol i no putim gen na 'corrosion' bai stat long hap taim ol i spreim sol. Wanem taim wanpela huk em i rongpela samting? Long simen we ol i spreim ol huk i save pas long 'mesh' na bal i go antap taim 'aspect ratio' i sot pinis, olsem na 'waved wire' i save givim gutpela kaikai. Insait long simen we i save strongim em yet, bikpela ron bilong en i save rausim hap bilong 'anchorage advantage'. Seleksen i no long strongpela 'fiber', em i long wanpela we i no kamapim hevi long dispela rot bilong putim. Sapos yu toktok pinis wantaim wanpela saplaia bilong 'hooked end steel fiber', salim 10-pela 'fiber' i go long ol na askim long 'spring-back' na 'break type' pastaim long yu salim wanpela 'purchase order'; wanpela saplaia husat i no inap bekim long ol dispela tok em i salim long prais tasol.

Sekim ol huk long taim bilong salim: Tripela samting ol i mas mekim

Long sekim ol huk yu no nidim ol instramen. Pastaim, tromoi wanpela hanful na harim: wanpela laitpela ring i min olsem i gat gutpela 'quenching', wanpela 'dull thud' i min olsem em i malumalum waia. Namba tu, skelim longpela na angle bilong huk long 10-pela 'fiber' wantaim wanpela 'caliper'; ol sotpela o liklik huk i save stretim hariap aninit long lod. Namba tri, bendim wanpela 'fiber' tupela taim na i go bek tripela taim; sapos em i bruk, dispela samting i bruk bruk. Bihain long dispela tripela step, sekim ripot bilong 'batch' egensim 'tensile strength' na 'diameter tolerance' na planti hevi i pinis. Long skelim wanwan model, pes bilong 'steel fiber' prodak i gat lista bilong 'diameter', longpela, 'aspect ratio' na ol 'tensile values' bilong wanwan gret, we i ken stap olsem wanpela 'acceptance baseline'.