Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

Yazarlar: Ahmet TEYMEN

Konular:Mühendislik, Ortak Disiplinler

DOI:10.28948/ngumuh.341831

Anahtar Kelimeler:Rockbolt,Grout,Mineral admixture,Metakaolin

Özet:    This paper represents the experimental results of the grout materials developed for rockbolts. Experimental studies cover the effects of mineral admixtures on the bond characteristics between grout and rockbolts. There are many studies in the literature about the effects of mineral admixtures on concrete strength. However, the number of studies on the effects of these admixtures on the mechanical properties of rockbolts are quite limited. Totally 120 rockbolt pull-out tests were carried out using ten different grout types in order to improve the load bearing capacity for four different curing times. Grout mixtures outside the reference grout were prepared using mineral admixtures instead of 15% by weight of the cement weight. Metakaolin and silica fume additive grouts were found to have higher strengths at all ages. The all strength test of fly ash grouts exhibited low values till 28 days of curing time, but a sharp increase was observed after this period. It is concluded that cement, in combination with waste mineral admixtures, can be utilized in making high strength grout and such grout can be used as grouting material at tunnelling applications. Thus, grout having low cost and high-strength can be produced with waste materials and waste utilization will be contributing to the solution of environmental problems.

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