Investigation of Hydrochloric Acid Resistance of Ground Pumice Powder Substituted Mortars

Yıl 2022, Cilt: 5 Sayı: 2, 160 - 170, 31.12.2022

Meryem Rumeysa Kayıhan , Behcet Dündar , Emriye Çınar Resuloğulları

https://doi.org/10.51764/smutgd.1199413

Öz

In this study, Hydrochloric (HCI) acid resistance of Ground Pumice Powder (GPP) mortars was investigated. In the preparation of the mortar mixtures, CEMI-42.5/R Portland Cement was used as the binder, and crushed sand with 0-4 mm grain size was used as the aggregate. Mortar samples were produced by substituting GPP as a mineral additive with cement at the rates of 0%, 10%, 20% and 30% by weight. In the investigation of the acid effect, 5% by volume of concentrated HCl acid was used. flow-table test was applied to fresh mortar samples. Mortar samples were kept in the standard curing pool for 7, 28 and 90 days and unit volume weight, water absorption and porosity ratios of the samples that completed their 28th and 90th days were determined. flexure and compression tests were performed on the samples that completed their 7th, 28th and 90th days. The samples, which were kept in the standard curing pool for 28 days, were then subjected to flexure and compression tests at the end of 7, 28 and 90 days in HCl acid curing. In HCl acid, unit volume weight, water absorption and porosity ratios of the samples that completed their 28th and 90th days were determined. As a result, it was observed that the flow-table value, unit weight, flexural and compressive strength decreased, water absorption and porosity ratios increased with the increase of the GPP substitution ratio compared to the reference sample. While the compressive strengths of the samples in the HCl acid solution during the 7-day waiting period increased with the increase in the GPP replacement ratio, a decrease occurred in the 28th and 90-day waiting times.

Anahtar Kelimeler

Mineral Additive, Ground Pumice Powder, Hydrochloric Acid, Acid Attack

Öğütülmüş Pomza Tozlu Harçların Hidroklorik Asit Direncinin İncelenmesi

Öz

Bu çalışmada, Öğütülmüş Pomza Tozlu (ÖPT) harçların Hidroklorik (HCI) asit direnci araştırılmıştır. Harç karışımlarının hazırlanmasında bağlayıcı olarak CEMI-42.5/R Portland Çimentosu, agrega olarak ise 0-4 mm tane boyutunda kırma kum kullanılmıştır. Mineral katkı olarak ÖPT, çimento ile ağırlıkça %0, %10, %20 ve %30 oranlarında ikame edilerek harç numuneleri üretilmiştir. Asit etkisinin araştırılmasında hacimce %5 derişikteki HCl asit kullanılmıştır. Taze haldeki harç numunelerine yayılma deneyi uygulanmıştır. Harç numuneleri 7, 28 ve 90 gün boyunca standart kür havuzunda bekletilmiş ve 28 ve 90. gününü dolduran numunelerin birim hacim ağırlık, su emme ve porozite oranları belirlenmiştir. 7, 28 ve 90. gününü dolduran numunelere eğilme ve basınç deneyleri yapılmıştır. Standart kür havuzunda 28 gün bekletilen numuneler daha sonra, HCI asit küründe 7, 28 ve 90 gün sonunda eğilme ve basınç deneyleri yapılmıştır. HCl asitte, 28 ve 90. gününü dolduran numunelerin birim hacim ağırlık, su emme ve porozite oranları belirlenmiştir. Sonuç olarak, ÖPT ikame oranının artmasıyla referans numuneye göre yayılma değerinde, birim hacim ağırlık, eğilme ve basınç dayanımında azalma, su emme ve porozite oranları ise artış gözlemlenmiştir. HCI asit çözeltisinde 7 gün bekleme süresinde numunelerin basınç dayanımları ÖPT ikame oranının artmasıyla artış gerçekleşirken, 28. ve 90 günlük bekleme sürelerinde azalış meydana gelmiştir.

Anahtar Kelimeler

Öğütülmüş Pomza Tozu, Hidroklorik Asit, Asit Etkisi, Mineral Additive, Ground Pumice Powder, Hydrochloric Acid, Acid Attack

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