Effect of superplasticizer on the fresh and hardened properties of mortars prepared with different types of cement produced from the same clinker

Year 2024, Volume: 30 Issue: 5, 660 - 667, 30.10.2024

Derya Över , Nesil Özbakan , Sinan Açıkyol , Abdulkadir Bakırcı

Abstract

In recent years, extensive research has been done on using
superplasticizers as a chemical additive in concrete. However, these
studies generally compare the effects of superplasticizers on cements of
different compositions. This paper presents data from laboratory tests
of mortars prepared with various cement types produced from the same
clinker at the same plant. Increasing dosages of superplasticizers (i.e.
0.8%, 1.0% and 1.2%) were added to CEMI, CEMII, CEMIII and CEMIV
cements produced from the same clinker. The effects of superplasticizers
on the workability and strength were analyzed by fresh and hardened
mortar tests. The results showed that clinker played the main role when
superplasticizer was used. Other modifications made to that cement,
had a minor effect only. The use of superplasticizers improved cement
behavior, increased flowability and reduced water requirement,
regardless of cement type. Moreover, the flexural and compressive
strengths increased since the addition of superplasticizers improved the
compressibility of the mortar.

Keywords

Cement, Clinker, Superplasticizers, Fresh properties, Hardened properties

Süperakışkanlaştırıcının aynı klinkerden üretilen farklı çimento türleri ile hazırlanan harçların taze ve sertleşmiş özelliklerine etkisi

Abstract

Son yıllarda, süper akışkanlaştırıcıların betonda kimyasal katkı olarak
kullanılması konusunda birçok araştırma yapılmıştır. Ancak bu
çalışmalar genellikle süper akışkanlaştırıcıların farklı bileşimlerdeki
çimentolar üzerindeki etkilerini karşılaştırmaktadır. Bu makale, aynı
fabrikada aynı klinkerden üretilen farklı çimento türleri ile hazırlanan
harçların laboratuvar testlerinden elde edilen verileri sunmaktadır.
Aynı klinkerden üretilen CEMI, CEMII, CEMIII ve CEMIV çimentolarına
artan dozlarda süper akışkanlaştırıcı (%0.8, %1.0 ve %1.2) eklenmiştir.
Süper akışkanlaştırıcı ilavesinin işlenebilirlik ve dayanım üzerindeki
etkileri taze ve sertleştirilmiş harç testleri ile analiz edilmiştir. Sonuçlar,
süper akışkanlaştırıcı kullanıldığında klinkerin ana rolü oynadığını
göstermektedir. Çimentoda yapılan diğer modifikasyonların yalnızca
küçük bir etkisi olmuştur. Süper akışkanlaştırıcı kullanımı, çimento
tipinden bağımsız olarak çimento davranışını iyileştirmiş, akışkanlığı
artırmış ve su gereksinimini azaltmıştır. Ayrıca, süper akışkanlaştırıcı
ilavesi harcın sıkıştırılabilirliğini geliştirdiği için eğilme ve basınç
dayanımları artmıştır.

Keywords

Çimento, Klinker, Süperakışkanlaştırıcı, Taze özellikler, Sertleşmiş özellikler

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