Mechanical Properties of Basalt Fiber tws strands Concrete

PRODUCT INTRODUCTION

Pob zeb, raws li cov khoom siv hauv tsev siv dav hauv kev tsim vaj tsev engineering, muaj cov khoom siv kho tshuab zoo, tab sis nrog kev sib sib zog nqus ntawm daim ntawv thov ntawm engineering technology, qhov tsis txaus ntawm nws cov cuab yeej siv tshuab tau maj mam nthuav tawm. Vim qhov tsis tshua muaj zog tensile cov yam ntxwv ntawm tsuas yog ib feem kaum ntawm lub zog compressive, uas ua rau cov tswv cuab ntawm cov txheej txheem tensile yog nquag tawg, uas ncaj qha txo cov durability ntawm lub Cheebtsam, nqaim lub Scope ntawm daim ntawv thov. Khoom siv pob zebs. Txhawm rau txhim kho engineering kev ua tau zoo ntawm cov pob zeb thiab daws cov teeb meem hauv kev siv cov pob zeb, cov kws tshawb fawb tau txhim kho kev ua haujlwm ntawmcov khoom siv pob zeb tau ntau xyoo thiab tau ua tiav cov txiaj ntsig ntawm theem-los-theem, xws li kev sib ntxiv ntawm cov khoom sib xyaw, kho qhov sib tov sib xyaw, txhim kho cov txheej txheem tsim khoom thiab kev saib xyuas.

1. Cov ntaub ntawv xeem thiab cov txheej txheem xeem

P. O 42.5 zoo tib yam silicate cement raug xaiv, nrog 28d compressive zog ntawm 48.3MPa thiab 28d flexural zog ntawm 8.2MPa. Cov xuab zeb nruab nrab nrog qhov kev ua kom zoo ntawm 2.5-2.6 tau siv ua cov khoom sib xyaw zoo, nrog qhov pom tseeb ntawm 1996kg / m3. nruam graded crushed pob zeb ntawm 5-27mm yog siv los ua ntxhib aggregate, nrog rau qhov pom tseeb ntom ntawm 2737kg / m3. Cov dej txo qis ntawm 40% tau siv. 40% ntawm Sika polycarboxylic acid tau siv cov dej txo tus neeg ua haujlwm zoo. Qhov ntev ntawm basalt fiber ntau tws strands yog hais txog 30 hli, txoj kab uas hla ntawm lub monofilament yog hais txog 15um, qhov ceev yog 2.7g / cm3, lub modulus ntawm elasticity yog 95-120MPa, lub tensile lub zog yog 3300-4500MPa, thiab lub elongation ntawm so yog hais txog 2.5-30%.

Cov khoom haum uas siv rau hauv qhov kev xeem no tau pom nyob rau hauv Table 1. Cov kev ntsuas compressive yog siv raws li tus qauv rau kev xeem Methods ntawm Mechanical Properties of Ordinary Concrete. Kev ntsuas compressive txais 100 × 100 × 100mm cubic specimens, 3 cov qauv hauv txhua pab pawg, tus qauv kho 28d.

2. Tyog cov kauj ruam

(1) ua ntej so cov ntawv xeem yuav tsum tau kuaj tom qab kuaj xyuas qhov tsos thiab ntsuas qhov loj me, raug rau kuv. Qhov tsis sib xws ntawm cov qauv bearing nto mus txog 100mm, qhov yuam kev tsis yog ntau tshaj 0.5mm, thiab cov kabmob nto thiab cov uas nyob ib sab uas tsis yog-perpendicularity yuav tsum tsis txhob ntau tshaj qhov yuav tsum tau ntawm cov degree ntawm 1 degree;

(2) cov qauv axis ntawm lub tshuab kuaj ua raws li qhov nruab nrab ntawm lub phaj siab hauv qab lub tshuab kuaj. Qhib lub tshuab kuaj, thaum lub phaj siab siab thiab lub xeem daim ntawv kaw, kho qhov kev txhawb nqa, kom lub zog sib xws;

(3) cov txheej txheem thauj khoom kom tswj tau qhov nruam thiab tsis tu ncua, kev ntsuas qhov nrawm yuav siv sijhawm 12kN / s-18kN / s; (4) sau qhov siab tshaj plaws load, raug rau 0.1MPa.

3. Kev ntsuam xyuas thiab kev soj ntsuam

Raws li tau pom los ntawm Table 2, 7d compressive zog ntawm pob zeb nrog qhov nce ntawm Basalt fibers nthuav qhia cov yam ntxwv ntawm kev hloov pauv mus rau qhov qis qis, uas yog vim qhov sib ntxiv ntawm basalt fibers, nyob rau hauv cov fibers thiab xis mas tsim nyob rau hauv lub interface los tsim ib tug tsis muaj zog nto, thiab nrog rau kev nce ntawm cov fiber ntau sib tov, qhov no tsis muaj zog nto txuas ntxiv mus, yog li lub cubic compressive zog ib txwm poob mus. Lub 28d compressive lub zog ntawm pob zeb nrog qhov nce hauv basalt fiber ntau ntau qhia tau hais tias tus qauv ntawm thawj qhov nce thiab tom qab ntawd txo qis, yog vim li cas rau qhov kev nce no thawj zaug yog me me ntawm doped.basalt fibers ua lub luag haujlwm hauv kev sib txuas rau qee yam hauv kev txo qis shrinkage deformation ntawm lub pob zeb nws tus kheej, thaum tib lub sij hawm nce qhov tsis muaj zog saum npoo txheeb ze rau 28d lub zog nce kom tsawg, uas nyob rau hauv tag nrho kev ua tau zoo ntawm lub zog nce.

4. Qhov tshwm sim

Los ntawm qhov kev xav ntawm cubic compressive zog, thaum shortcut basalt fiber ntau admixture ncav cuag li 1-1.5% los ntawm ntim feem pua, 7d thiab 28 cubic compressive zog ntawm shortcut. basalt fiber ntau pob zeb tau nce mus rau qee qhov piv rau cov pob zeb uas tsis muaj fiber ntau admixture.