THE EFFECT OF DIFFERENT STEEL FIBERS SIZE WITH PRE-SETTING PRESSURE ON BASALT AGGREGATE CREATED USING THE REACTYVE POWDER CONCRETE

Yıl 2011, Cilt 6, Sayı 4, 60 - 72, 01.05.2011

Metin İPEK

Öz

In this study, the coarse aggregate (basalt aggregate) is created using the reactive powder concrete (RPB) with different fiber content, size and cost of compression pressure was investigated. The mixture composition, which would present the best performance during the flexural tests, was determined. Pre-setting pressure tests at six different magnitudes (0, 5, 10, 15, 20, 25 MPa) were conducted on the freshly prepared RPB having the determined mixture composition. The 30 mm long steel fibers mixed ratio of 4.5% provided the highest flexure strength and the fracture toughness. The highest pre-setting pressure was attained at 25 MPa and the flexural strength of the sample increased by 244% reaching 40.91 MPa at that pre-setting pressure.

Anahtar Kelimeler

Reactive powder concrete, pre-setting pressure, fibre, flexural strength, toughness,

BAZALT AGREGASI KULLANILARAK ÜRETYLMY? REAKTYF PUDRA BETONUNA FARKLI BOYUTLARDAKY ÇELYK LYFYN VE SIKI?TIRMA BASINCININ ETKYSY

Öz

Bu çaly?mada, iri agrega (bazalt agrega) kullanylarak üretilmi? reaktif pudra betonuna (RPB) farkly lif boyutu ve içeri?i ile syky?tyrma basyncynyn etkisi ara?tyrylmy?tyr. Ylk olarak farkly kary?ym oranlary teknikleri kullanylarak lifsiz olarak RPB olu?turulmu?tur. Olu?turulan bu kary?ymda, farkly boyuttaki çelik lifler, farkly oranlarda kullanylmy?tyr. E?ilme deneyi ve kyrylma toklu?u deneyi sonucu en yüksek de?eri veren lif tipi ve orany seçilmi?tir. Seçilen lif tipi ve orany kullanylarak hazyrlanan taze haldeki RPB'ye alty farkly oranda (0, 5, 10, 15, 20, 25 MPa) syky?tyrma basyncy uygulanmy?tyr. Syky?tyrma basyncy uygulamasynda en yüksek de?ere 25 MPa syky?tyrma basyncy ile ula?ylmy? ve syky?tyrma basyncy uygulanmamy? numune ile arasynda % 244 e?ilme dayanymy artarak 40,91 MPa de?erine ula?ylmy?tyr.

Anahtar Kelimeler

Reaktif pudra betonu, syky?tyrma basyncy, lif, e?ilme dayanymy, tokluk,