Erken Dönem Harç Hasarlarının Tamirinde Buhar Kürünün Etkinliğinin Araştırılması

Year 2017, Volume: 19 Issue: 55, 132 - 146, 01.01.2017

Hüseyin Yiğiter

Abstract

Bu çalışma kapsamında erken dönemde oluşan çimento
harcı hasarlarının iyileştirilmesinde standart kür, buhar kürü ve
hava kürü yöntemlerinin etkinliği araştırılmıştır. Portland
çimentosu ve katkılı çimento harçlarına 1., 2., 4. ve 7. günlerde
basınç dayanımlarının %50, 75, 90 ve 100 seviyelerinde gerilme
uygulanmıştır. Test sonuçları 4. güne kadar %90'dan daha düşük
ön yükleme uygulamasının standart kürlü numunelerin nihai
dayanımlarını etkilemediğini göstermiştir. Diğer yandan 2 günden
sonra ön yükleme yapılmış ve havada kür edilmiş numunelerin
test sonuçları kontrol numunelerine eşit veya daha büyüktür.
Buhar kürü uygulaması beklenen mukavemet artışını sağlamamış
ancak daha az değişken dayanım sonuçları elde edilmiştir. Katkılı
çimento ile üretilmiş harç numunelerinde buhar kürü uygulaması
ile daha iyi sonuçlar elde edilmiştir. Uygun kür yönteminin seçimi
ile tam hasar durumunda bile 53 MPa basınç dayanımı sonucuna
ulaşmak mümkün görünmektedir

Keywords

Portland Çimentosu Harcı, Buhar Kürü, İyileşme, Erken Dönem Mekanik Özellikler

Effectiveness of Steam Curing on Repairing Early Age Mortar Damages

Abstract

Standard, steam and air curing methods were
investigated in the scope of presented study to assess the healing
performance of early age mortar damages. Compressive stress
levels of 50, 75, 90 and 100 % of strength were adapted to
Portland cement mortar or blended cement mortar specimens at
early ages. Test results exhibited that preloading level under 90 %
of instantaneous strength until 4 days, did not affect the ultimate
strength for standard cured specimens. On the contrary, results
obtained from air cured specimens preloaded after 2 days were
almost equal or greater than that of control specimens.
Surprisingly, steam curing application could not provide expected
recuperation; however, less variable strength results were
obtained. Blended cement mortar specimens achieved better
results with steam curing process. Besides, it was possible to
reach 53 MPa compressive strength by selecting a proper curing
treatment even in the case of full damage

Keywords

Portland Cement Mortar, Steam Curing, Healing, Early Age Mechanical Properties.

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