The Effect of Surface Properties of Pumice and Diatomite on Physical and Mechanical Properties of Portland Cement

Öz

In order to understand the interaction mechanism between pozzolanic materials and cement, it is very important to determine the surface properties with the zeta potential of the materials. In this study, physical, chemical properties and zeta potentials of Portland cement, pumice and diatomite were determined. Then, the water requirement, setting time, volume expansion and compressive strength values of the reference, 5+5% and 10+10% pumice and diatomite substituted cements were determined. The data obtained showed that there were differences in the surface properties of the raw materials used, water demand, volume expansion values, setting times and compressive strengths according to their chemical and physical structure. In addition, it was determined that Portland cement, pumice and diatomite have negative zeta potential values.

Anahtar Kelimeler

• Portland cement
• pumice
• diatomite
• zeta potential
• compressive strength

Pomza ve Diatomitin Yüzey Özelliklerinin Portland Çimentosunun Fiziksel ve Mekanik Özelliklerine Etkisi

Öz

Puzolanik malzemelerin çimento ile arasındaki etkileşim mekanizmasının anlaşılabilmesi açısından, malzemelerin zeta potansiyel ile belirlenen yüzey yüklerinin bilinmesi oldukça önemlidir. Bu amaçla yapılan çalışmada, Portland çimento, pomza ve diatomitin fiziksel ve kimyasal özellikleri ile zeta potansiyelleri belirlenmiştir. Daha sonra referans ve %5+5 ve %10+10 pomza ve diatomit ikameli çimentoların su ihtiyacı, priz süresi, hacim genleşme ve basınç dayanımı değerleri elde edilmiştir. Bu değerlere göre, hammaddelerin yüzey yükleri, kimyasal ve fiziksel yapısına göre su ihtiyacı, hacim genleşme değerleri, priz süreleri ve basınç dayanımlarında farklılıklar meydana geldiğini göstermiştir. Ayrıca Portland çimentosu, pomza ve diatomitin negatif zeta potansiyel değerine sahip olduğu belirlenmiştir.

Anahtar Kelimeler

• Portland çimento
• pomza
• diatomit
• zeta potansiyel
• basınç dayanımı

Kaynakça

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