Properties and performances of mortars with primary and secondary mineral additives applied as cement replacement

Tehnika

Terzić Anja M.¹  Mijatović Nevenka S.¹  Radojević Zagorka M.¹  Miličić Ljiljana R.¹ 

[1] Institut za ispitivanje materijala, Beograd;

关键词: building materials;    mechanical properties;    thermal properties;    sorption;    recycling;   

DOI  :  

来源: DOAJ

【 摘 要 】

Mineral additives are extensively applied as cement replacements in building concretes and mortars. Fly ash is one of the most commonly used additives which enhance rheological, mechanical and thermal properties of material. However, this industrial byproduct comprises heavy metals; therefore the optimization of its effective dosage is necessary. Clayey materials, such as zeolite and bentonite, can prevent migration of toxic elements from fly ash by immobilizing them in their structure. In this paper, three experimental mortars where designed, prepared and investigated. Mortars were based on Portland cement, river sand and mineral additive - fly ash, zeolite and bentonite. Mortar M1 comprised all three additives used in 1:1:1 ratio, mortar M2 contained zeolite and bentonite in 1:2 ratio, while ratio of zeolite and bentonite in M3 mortar was 2:1. The aim of the study was to investigate the effect of mineral additives on physico-chemical, thermal and mechanical performances of mortar. X-ray diffraction, DTA, dilatometry and FRIR analyses were applied on mortar samples. The results of the investigation highlighted that economical mortar with good properties can be obtained by application of these mineral additives.

【 授权许可】

Unknown