Investigation of The Effect of Ground Colemanite Additive on Hydraulic Lime-Based Mortars

Year 2025, Volume: 10 Issue: 1, 116 - 125, 28.07.2025

Sebahat Sevde Sağlam , Nazife Özer , Seden Acun Özgünler

https://doi.org/10.30785/mbud.1636026

Abstract

Boron is a rare metalloid found in borate minerals like borax, kernite, colemanite, and ulexite. In the construction sector, it is used to protect wood from fungi, insects, and decay, as well as to enhance fire resistance in building materials. Additionally, it serves as an additive in cement and concrete to improve structural properties. This study investigated the effects of ground colemanite (45 µm and 75 µm) as a partial substitute (0-3%) for natural hydraulic lime (NHL 3.5) in mortar. The 28-day mechanical strength and physical properties of the samples were analyzed. Results showed that colemanite improved compressive strength but had little impact on other characteristics, including water absorption. This indicates that at low concentrations, colemanite does not significantly affect the mortar's water permeability.

Keywords

Colemanite , boron , mortars , natural hydraulic lime , lime

Hidrolik Kireç Esaslı Harçlarda Öğütülmüş Kolemanit Katkı Maddesinin Etkisinin Araştırılması

Abstract

Bor, boraks, kernit, kolemanit ve uleksit gibi borat minerallerinde bulunan nadir bir metalloiddir. Yapı sektöründe ahşabı mantar, böcek ve çürümeye karşı korumak için kullanılır. Ayrıca, yapı malzemelerinde yangına dayanıklılığı artıran bir katkı maddesi olarak da yer alır. Çimento ve beton katkısı olarak ise yapısal özellikleri iyileştirmeye yardımcı olur.Bu çalışmada, öğütülmüş kolemanit (45 µm ve 75 µm), doğal hidrolik kireç (NHL 3.5) yerine %0-3 oranında kullanılarak hazırlanan harçların 28 günlük mekanik dayanımı ve fiziksel özellikleri incelenmiştir. Sonuçlar, kolemanit eklemenin basınç dayanımını artırdığını ancak diğer özellikler üzerinde belirgin bir etkisi olmadığını göstermiştir. Özellikle, kolemanit katkısı su emme oranlarını değiştirmemiştir. Bu durum, düşük oranlarda kolemanit katkısının harç matrisinin su geçirgenliği üzerinde sınırlı bir etkisi olduğunu göstermektedir.

Keywords

Kolemanit , bor , harçlar , doğal hidrolik kireç , kireç

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