Mogućnosti upotrebe pepela s dna peći u betonskim predgotovljenim proizvodima

Stjepan Lakusic

doi:10.14256/jce.1589.2016

Abstract

Mogućnosti upotrebe pepela s dna peći u betonskim predgotovljenim proizvodima

Highlights

The use of coal bottom ash in concrete, and the influence of coal bottom ash on the properties of concrete such as workability, compressive strength, bleeding, setting times, split tensile strength, flexural strength, shrinkage, and durability, are presented in this paper
The results showed that the concrete with 30 % replacement of natural fine aggregate with industrial by-product aggregate exhibited greater increase in compressive strength, splitting tensile strength, and flexural strength as compared to conventional concrete [10]
Taking into account specific characteristics affecting durability of concrete, the testing involving the minimum amount of cement, watercement ratio, and air content for exposure class XF 4 to freezing and thawing, was conducted in accordance with SRPS EN 2061:2011

Summary

Introduction

The use of coal bottom ash in concrete, and the influence of coal bottom ash on the properties of concrete such as workability, compressive strength, bleeding, setting times, split tensile strength, flexural strength, shrinkage, and durability, are presented in this paper. Aggarwal and Siddique investigated the way in which concrete properties are influenced by equal quantities of waste foundry sand and bottom ash as a substitute of fine aggregate. The results showed that the concrete with 30 % replacement of natural fine aggregate with industrial by-product aggregate exhibited greater increase in compressive strength, splitting tensile strength, and flexural strength as compared to conventional concrete [10]. In the investigation made by Singh and Siddique, the coal bottom ash was used as a substitute of river sand at 0, 30, 50, 75 and 100 % replacement levels by mass in concrete They found that the use of coal bottom ash in concrete did not influence compressive strength and pulse velocity at 28 days. Current standards for dry fly ash (SRPS EN 4501:2014 and SRPS.B.C1.018) were used in the examination, because the standards for bottom ash are not as yet available

Experimental work

Concrete mixtures

Results and discussion

Conclusions