THE EFFECT OF VOLCANIC TUFF AND ASH ON THE PROPERTIES OF LIGHTWEIGHT STRUCTURAL CONCRETE

Abstract

Abstract. Currently, one of the most pressing problems in construction is the development of inexpensive building materials that can surpass those existing in their technical characteristics. In this article, the question was raised about the experience of using lightweight concrete with volcanic tuff and ash. By reviewing scientific publications and conducting studies, the advantages of lightweight concrete, such as low weight, low thermal conductivity, were revealed. The compressive strength of all concrete cube samples during the laboratory study decreased during the hardening period, on average by about 20% than the control sample. Also, in the course of the work, a decrease in the thermal conductivity of the samples and a decrease in the average density of concrete samples were revealed. As a result of the work carried out, the prospect of developing lightweight concrete using volcanic tuff and ash, which have a compressive strength of 27.8 MPa and an average density of 1850.0 kg / m³, was revealed. Values for the comminution of the aggregate of up to M1000 marks were achieved. The thermal conductivity values were determined, which range from 0.724 to 0.812 W/m·K.