# Analysis of Slag-Containing Steamed Concrete’s Composition Efficiency

## TL;DR

This paper explores how using thermal power plant slag in concrete can improve its strength and efficiency, especially after steam treatment.

## Contribution

The novelty is using an experimental–statistical model to optimize slag-containing concrete for maximum strength per kilogram of cement.

## Key findings

- Optimal slag content in aggregate for maximum strength at 4 hours is 0.5–0.55.
- Optimal slag content for maximum strength at 28 days is 0.45–0.55.
- A method for designing slag-based concrete compositions is proposed.

## Abstract

Thermal power plant slag is a waste that is presently obtained from many power stations all over the world. A possible method for its utilization is using it to produce concrete. This paper analyses the effect of thermal power plant slag on the technological properties of concrete mixtures and the mechanical properties of concrete subjected to heat–moisture processing. Quantitative estimates of the investigated factors’ influence on the concrete mixture’s water demand and the strength of steamed concrete were obtained. The influences of TPP slag content and its water demand on concrete composition features as well as concrete strength are shown. The novelty of the work lies in the use of an experimental–statistical model to optimize the composition of steamed concrete using slag from the viewpoint of maximum strength per kilogram of cement. It has been demonstrated that the optimal part of slag in aggregate, which provides maximum strength at 4 h and 28 days after steaming, is 0.5–0.55 and 0.45–0.55, respectively. A method for the design of concrete composition using slag from thermal power plants is proposed.