Njirimara akụrụngwa nke Basalt Fiber chopped strands Concrete

Okwu Mmalite ngwaahịa

Concrete, dị ka a n'ọtụtụ ebe na-eji ụlọ ihe onwunwe na obodo engineering, nwere ezi n'ibu Njirimara, ma na-aga n'ihu na-emikpu nke ngwa nke engineering technology, adịghị ike nke ya isi n'ibu Njirimara na-eji nwayọọ nwayọọ na-ekpughe. N'ihi na ala tensile ike e ji mara naanị otu ụzọ n'ụzọ iri nke compressive ike, n'ihi na ndị òtù nke tensile usoro na-adịkarị mfe cracking, nke kpọmkwem ebelata anwụ ngwa ngwa nke components, narrowing akporo ngwa nke. Ihe eji eme ihes. Iji melite engineering arụmọrụ e ji mara ihe na-edozi nsogbu na ngwa nke ihe, ndị ọkà mmụta na-emeziwanye arụmọrụ nkeihe ihe ruo ọtụtụ afọ ma nweta nsonaazụ ogbo-site-ọkwa, dị ka mgbakwunye nke admixtures, na-edozi nhazi ngwakọta, meziwanye usoro mmepụta na usoro nhazi.

1. Nnwale ihe na ụzọ ule

P. O 42.5 nkịtị silicate ciment a họọrọ, na 28d compressive ike nke 48.3MPa na 28d mgbanwe ike nke 8.2MPa. A na-eji ájá ọkara nke nwere modul ịdị mma nke 2.5-2.6 mee ihe dị ka nchịkọta dị mma, na njupụta pụtara ìhè nke 1996kg/m3. A na-eji nkume a gbajiri agbajiri agbagọ na-aga n'ihu nke 5-27mm dị ka nchịkọta na-enweghị isi, yana njupụta pụtara ìhè nke 2737kg/m3. A na-eji ọnụego mbelata mmiri nke 40% mee ihe. A na-eji 40% nke Sika polycarboxylic acid na-arụ ọrụ nke ọma na-ebelata mmiri. Ogologo nke eriri basalt chopped strands bụ ihe dị ka 30mm, dayameta nke monofilament bụ banyere 15um, njupụta bụ 2.7g / cm3, modul nke elasticity bụ 95-120MPa, ike ike bụ 3300-4500MPa, na elongation na nkwụsịtụ bụ banyere 2.5-30.%.

E gosipụtara ihe dabara adaba ejiri na ule a na Tebụl 1. A na-emejuputa ule mkpakọ dịka Standard for Test Methods of Mechanical Properties of Ordinary Concrete. Nnwale mkpakọ na-anabata ụdị cubic 100 × 100 × 100mm, ụdị 3 n'otu ọ bụla, ọgwụgwọ ọkọlọtọ 28d.

2. Tbụ nzọụkwụ

(1) buru ụzọ hichaa mpempe ule a ga-anwale mgbe ịlele ọdịdị ya na nha nha, ziri ezi nye m. Edoghị oke nke ihe nlere anya na-ebu elu ruru 100mm, njehie ahụ abụghị ihe karịrị 0.5mm, na ihe na-ebu ya na nke dị n'akụkụ na-abụghị perpendicularity ekwesịghị ịdị ukwuu karịa ihe achọrọ nke ogo 1;

(2) axis ihe atụ nke igwe nyocha nke kwekọrọ na etiti efere nrụgide n'okpuru igwe nyocha. Mepee igwe nyocha, mgbe efere elu-nrụgide na mpempe ule na-emechi, dozie nkwado ahụ, ka ike ahụ wee bụrụ otu;

(3) usoro ntinye iji nọgide na-aga n'ihu ma na-edobe anya, ule nbudata ọsọ na-ewe 12kN / s-18kN / s; (4) dekọọ ibu kachasị, ziri ezi na 0.1MPa.

3. Nnwale ule na nyocha

Dị ka a pụrụ ịhụ na Isiokwu 2, na 7d compressive ike nke ihe na-abawanye nke Basalt eriri na-enye njirimara nke na-agbanweghị ka ọ na-ebelata nwayọọ nwayọọ, nke bụ isi n'ihi mgbakwunye nke eriri basalt, na fibers na ciment kpụrụ na interface na-emepụta ihe na-adịghị ike, na mmụba nke ọnụ ọgụgụ fiber na-ejikọta ọnụ, ụdị adịghị ike dị elu na-aga n'ihu na-abawanye, ya mere, ike nke cubic compressive na-anọgide na-adaba. The 28d compressive ike nke ihe na mmụba nke basalt fiber dosage na-egosi usoro nke mmụba mbụ wee belata, ihe kpatara mmụba mbụ a bụ obere ego doped.eriri basalt na-ekere òkè na ijikọ ruo n'ókè ụfọdụ na mbenata shrinkage deformation nke ihe n'onwe ya, ma n'otu oge ahụ na-abawanye na-adịghị ike n'elu ikwu na 28d ike abawanye na-a otutu obere, nke na n'ozuzu arụmọrụ nke ike na-abawanye.

4. Nsonaazụ

Site n'echiche nke ike mkpakọ cubic, mgbe mkpirisi basalt fiber admixture ruru ihe dịka 1-1.5% site na pasent olu, 7d na 28 cubic compressive ike nke ụzọ mkpirisi. eriri basalt ihe na-abawanye ruo n'ókè ụfọdụ ka tụnyere nke ihe na-enweghị eriri admixture.