ДОСЛІДЖЕННЯ ВПЛИВУ ДОБАВОК НА ОТРИМАННЯ НИЗЬКОТЕМПЕРАТУРНИХ РЕЖИМІВ У ТЕХНОЛОГІЇ ВИРОБНИЦТВА ЗАЛІЗОБЕТОННИХ ШПАЛ

Abstract

Today the characteristic feature of modern building technology is the wide use of chemical additives to achieve the re-quired properties of concrete, reducing the material consumption and energy resources in the production of this material and when using it for the production of constructions and products.It was found that perspective direction for reducing energy intensity of the precast reinforced concrete is using of the low temperature regimes of thermal treatment and taking into account the heat of cement hydration. To achieve the set goal the possibility of using additives such as Sika Раvег НС-1, Nitkal S45 and calcium formate in sleeper technology was considered.The influence of additives on the strength characteristics of concretes, which hardened under different temperature con-ditions, was considered.Results of the researches on the effect of introduction additives in the production of concrete mixture on the strength characteristics of concretes are presented. Taking into account the fact that laboratory and industrial conditions of concrete mixes and concretes have certain dif-ferences, the influence of additives is considered in laboratory and industrial conditions.Competent use of cements in production technology leads to energy saving, therefore, the complex effect of additives and binders that contain mineral additives wasdetermined