June 15, 2019
Wɔ chloride tebea mu no, fiber bo biako nyɛ ɛka titiriw da. Asɛmmisa no ne sɛ ebia reinforcement no da so ara wɔ hɔ wɔ afe aduasa mu anaa.
Kɔbere a ɛwɔ dade nhama a wɔde adura ho so no mu duru yɛ micrometres kakraa bi. Ɛma nsɛe brɛ ase na ɛma ɛne semɛnte matrix no bom tu mpɔn; ɛmma ahobammɔ a ɛtra hɔ kyɛ. Wɔ dan mu a ɛyɛ kusuu, fam a ɛyɛ mpapahwekwa ne abɔnten tebea a ɛyɛ mmerɛw mu no ɛtra hɔ kyɛ wɔ nhyehyɛe no nkwa nna mu. Wɔ chloride mmeae te sɛ mpoano, nkyene asase, nnuruyɛ adwumayɛbea ne nkyene akwan a nsukyenee fi mu no, chloride bubu passive film no, na sɛ kɔbere a ɛwɔ mpɔtam hɔ no sɛe pɛ a, dade no mu no fi ase to amena. Wonhu amena na emu dɔ, enti bere a nkannare nkekae bɛda adi no, na ɔfã kɛse bi ayera dedaw. Ɛno nti na po so adwumayɛbea ne nnuru a wɔde gu nsukorabea mfa nhama a wɔde kɔbere adura ho nni dwuma no.
Stainless grade a wɔtaa de di dwuma no yɛ 304, ɛboro 2000 MPa tensile na ɛyɛ adwuma kodu 650 C, na ɛyɛ adwuma sen plated fiber denam nsonsonoe kɛse so wɔ nkyene a wɔde petepete mu: nnafua 180 a wɔde sɔ hwɛ no gyaw ahoɔden a wɔhwere 5.6% pɛ, bere a plated fiber ayɛ rust afa mu bere tenten ansa na ɛreba. Molybdenum wɔ 316L mu na ɛko tia chloride pitting yiye wɔ bo a ɛkorɔn mu. Nea wɔpaw no dan chloride dodow ne ɔhyew: ɛpo mu nsu a atwa ho ahyia ne mpoano wim tebea taa yɛ papa wɔ 304; ɔhyew a ɛkɔ soro ne chloride a ɛkɔ soro, te sɛ nea ɛwɔ nnuru a wɔde yɛ nneɛma anaasɛ flue gas desulphurisation mu no, frɛ 316L anaa duplex. Sɛ́ wobɛpaw nea ɛkorɔn no nyɛ adesɛe, nanso ɛho ka yɛ den; paw a ɛba fam no kyerɛ sɛ wobɛbɔ spalling mfe kakraa bi akyi.
Sɛ wɔde toto ho a, dodow no kyerɛ biribi nkutoo. Fiber a ɛnyɛ den a carbon nnim no yɛ nkannare wɔ nna kakraa bi mu wɔ dan a wɔde nkyene petepete mu mu na ɛhwere n’ahoɔden bɛboro fã wɔ nna du du mu; nhama a wɔde adura ho no tra ase ɔsram biako anaa abien ansa na pitting no ayɛ ntɛmntɛm; 304 da so ara wɔ n’ahoɔden 94.4% wɔ nnafua 180 mu. Enti wɔ po mu tebea koro no ara mu no, nhama a ɛnyɛ den kyɛ sen nhama a wɔde adura ho mpɛn du du. Ɛno nyɛ nkɔso ketewaa bi, ɛyɛ nsonsonoe a ɛda nea wotumi de di dwuma ne nea wontumi mfa nni dwuma ntam, efisɛ wɔayɛ po mu adan mfe aduonum na biribiara a wɔde kata so ntra ase mfe aduonum wɔ chloride mu.
Wɔ 0.16 ne 0.22 mm no fiber no yɛ micro wire, a wɔde di dwuma wɔ afasu a ɛyɛ tratraa, precision mortars, UHPC elements ne baabiara a dense three-dimensional network hia. Wɔ 0.75 mm no ɛyɛ structural grade, wɔde di dwuma wɔ bridge deck overlays mu ne sɛ nea wɔde si amanne kwan so reinforcement ananmu wɔ po mu nneɛma mu. Micro wire ma nhama pii pii wɔ kilogram biara mu, enti sɛ wɔde dodow a ɛyɛ pɛ di dwuma a, ɛyɛ nhama a ɛyɛ den na esiw mpaapaemu a ɛyɛ fɛ no ano; ne anohyeto ne tumi a ɛba fam wɔ fiber biara mu, enti entumi nsi structural bar a ɛyɛ den ananmu. Di kan si mpaapaemu no trɛw a ɛsɛ sɛ wohwɛ so ho gyinae, afei ne kɛse.
Nnuru a wɔde gu nsukorabea mu a ɛporɔw no fi akwan abiɛsa so: acidic media, chloride, ne wet ne dry cycling. Sakraman a wɔde tu kwan ne nea wobu no adewa sen biara, efisɛ wɔma kɔnkrit a ɛwɔ nsu kwan no so no yɛ nwini mpɛn pii na ɛyow na ɛporɔw ntɛmntɛm koraa sen kɔnkrit a ɛkɔ nsu ase daa. Ɔkwan a wɔtaa fa so yɛ 304 anaa 316L fiber concrete wɔ ne nyinaa mu, a dodow a ɛkorɔn anaasɛ grade a ɛkorɔn wɔ mpɔtam hɔ wɔ nsu line no so. Kataso mu dɔ ne ade foforo a ɛkɔ akyiri: nhama a ɛnyɛ den nsi nkataso ananmu, na nhama a ɛda adi wɔ soro no da so ara bɛyɛ baabi a nsɛe, enti ɛsɛ sɛ wodi kataso a wɔakyerɛ no so koraa.
Bridge deck overlays wɔ po so twa yɛ application a ɛsom bo kɛse. Nea wɔde kata so no yɛ teateaa, mpɛn pii no ɛyɛ mm 60 kosi 80, ɛde kar brɛ adesoa, na ɛtra po mu chloride mu, tebea abiɛsa prɛko pɛ a nhama a wɔde adura ho no ntumi ntra ase. Adeyɛ de stainless micro wire anaa 304 fiber di dwuma wɔ 1% kosi 2% wɔ ne kɛse mu, mpɛn pii no wɔde polymer anaa epoxy-coated bar. Ɛbɔ ka kɛse ansa na wɔayɛ, nanso sɛ wɔde toto ho a, sɛ wosiesie kɛse mfe anum biara a, nkwa nna nyinaa ho ka no sua. Ɛno nti na po mu tenders taa kyerɛ nhama a ɛnyɛ den na wɔpow sɛ wɔde aduru a wɔde adura ho besi ananmu no.
Stainless steel fiber bo yɛ nea kɔbere adura ho a wɔde awɔw twe waya bo mmɔho asia kosi du, enti ɛnyɛ nea eye sen biara da, ɛno nkutoo ne nea wobetumi apaw. Sɛ́ ebia ɛfata no gyina tebea abiɛsa a wɔde kura mu prɛko pɛ so: sɛnea wɔayɛ no nkwa nna a ɛboro mfe 15, chloride anaa acid a wɔde hyɛ mu, ne beae a wontumi nsiesie anaasɛ ne bo yɛ den yiye sɛ wobesiesie. Drop any one na sika no sɛe. Ɛda adi pefee sɛ etua ka wɔ beae a asorɔkye wɔ wɔ mpoano asɛnka agua so, nnuruyɛbea bi a wɔde nsu gu mu a wɔde nsu gu mu, beae a atwa bridge deck expansion joint ho ahyia, ne mframa fĩ adwumayɛbea bi a wɔde mframa gu mu. Ɛda adi pefee sɛ entua ka wɔ dan mu fam, dan ase a ɛhɔ yɛ kusuu mu, anaasɛ apron a wobetumi de abɔ so sɛnea wɔpɛ, baabi a waya a wɔde kɔbere adura ho a wɔde aduru a esiw nsɛe ano dɔɔso no. Wɔ grade paw mu no, 304 yɛ adwuma a wotumi de ho to so wɔ chloride 200 ppm ase, 316L kura molybdenum na ɛkura bɛyɛ 1000 ppm, na po mu nsu a wɔde bɛhyɛ mu anaasɛ de-icing nkyene hwehwɛ 316L; 446 yɛ ferritic ɔhyew-resistant grade a eye kosi 1400 degrees Celsius nanso ɛnyɛ chloride, enti mfa nsi baabi a ɛnteɛ. Wɔtaa bu ani gu ade biako a ɛho ka so: dodow a wɔde ma stainless no ntumi nsuasua carbon dade akontaabu bi kɛkɛ, efisɛ ɛsono tensile range na flexural toughness botae koro no ara betumi ahia volume fraction soronko, a ɛyɛ nea ɛwɔ quotation no mu. Sɛ wode beae a nkannare ayɛ no toto ho wɔ nnafua 180 a wɔde nkyene apetepete so akyi no ne ɔkwan a ɛkɔ tẽẽ sen biara a wɔfa so de ti ne ti, enti bisa wɔn a wɔde nneɛma ma no ma wɔmma wɔn nsɛm wɔ sɔhwɛ tebea horow a ɛyɛ pɛ mu sen sɛ wode adesuakuw din bɛtoto ho.
Gyinaesi no so tew ba nsɛmmisa abiɛsa. So chloride wɔ nneɛma a atwa yɛn ho ahyia no mu, efi po mu nsu, asase a nkyene wom anaa nkyene a ɛma nsukyenee fi mu. So element no yɛ thin-walled anaasɛ ɛwɔ beae a nsu ne dry. So design nkwa nna boro mfe aduasa. Yiw mmuae abien ma stainless yɛ nea ntease wom a wɔpaw; yiw biako ma kwan ma wɔfa kwan no fã bi, a ɛnyɛ den wɔ mmeae a ɛho hia na wɔde nkata so wɔ mmeae afoforo; abiɛsa no mmuae biara na plated fiber no yɛ nea ɛfata koraa. Wɔ grades, diameters ne temperature ratings ho no, stainless fã a ɛwɔ steel fiber product krataafa no mu no kyerɛw 304 ne micro wire ranges a ɛwɔ diameter, tenten ne ahoɔden, a wobetumi de adi dwuma tẽẽ sɛ selection data.
Ka wo project scenario ne ahwehwɛdeɛ kyerɛ yɛn, na yɛbɛma ano aduru a ɛfata no ahyia na yɛde quote ama wɔ nnɔnhwereɛ 24 ntam.
Nya Quote a Wɔde Ma KwaKɔbere-plated microwire, awɔw twetwe hook awiei type, glued wɔ row, fam type, 304 / 310S / 446 stainless dade ne melt-twe ɔhyew-resistant fiber, UHPC soronko synthetic fiber, diameter 0.2 kosi 1.0 mm, tenten 6 kosi 60 mm, tensile ahoɔden 700 kosi 2850 MPa, emu nsɛm coverage 0.5% kɔsi 2% volume rate ne 30 kɔsi 268 kg/m3. Wobetumi ayɛ nhyehyɛe a wɔbɛyɛ no sɛnea ASTM A820 anaa EN 14889-1 kyerɛ na wobetumi de batch inspection amanneɛbɔ ama. Wɔboa nneɛma a wɔde kyekyere nneɛma ahorow abiɛsa: nnaka, ton bag ne bulk. Aguadi ho nsɛm yɛ nea wobetumi apaw EXW / FOB / CIF / DDP.
Sua dade nhama a wɔpaw ne nsɛm a wɔafa aka ho ade →