The effect of the mobility of the concrete mixture on the air content and frost resistance of concrete

Abstract

In the technology of building roads, bridges, buildings and structures, concrete mixtures of different mobility are used. It depends on the complexity of the design, equipment and technical requirements. The main requirement for any product or design is high durability. The main index of durability is frost resistance. To increase the frost resistance of concrete, an additional network of air pores is created. This network is formed through the use of airentraining additives and when the concrete mix is mixed. Different quantity of air may enter in concrete mixes of different mobility. But an increase of the quantity of air involved leads to a decrease of concrete performance. Therefore, it is necessary to know the volume of air bubbles and how they change the properties of concrete. The work shows how the mobility of concrete mixtures affects on the amount of air involved. The results of studies of frost resistance of concrete made from mixtures of different mobility are presented.

A review on concrete’s rheological properties

“…Due to adhesion, the cohesive force was developed and the adhesion forces were created because of adhesion among the aggregate particles and matrix. Tolmachov et al (2019) have presented an effect of concrete mixture mobility on frost resistance and air content of concrete. The durability of concrete’s main index was frost resistance.…”

“…Compressive strength is described as the material or element’s ability to withstand the load, which reduces the material size or leads to failure when the load is applied. The compressive strength of different mixtures of concrete like heavy weight concrete (HWC) (silica fume + fly ash) (Gökçe and Andiç-Çakır, 2019), sustainable concrete (SC) (brick dust + demolition waste) (Amakye et al , 2021), binary blended concrete (BBC) (RHA) (Givi et al , 2010), normal concrete (NC) (steel slag) (Devi and Gnanavel, 2014), frost resistance road concrete (FRRC) (Tolmachov et al , 2019), alkali-activated concrete (AAC) (metakaolin + blast furnace slag) (Nunes et al , 2019) and abrasion resistance concrete (ARC) (silica fume + PVA fiber) (Wang et al , 2017) were compared. In addition, the reliable concrete requires a minimum of 17,300KN/m2.…”