Brick Debris Dust as an Ecological Filler and Its Effect on the Durability of Asphalt Mix.

Agnieszka Woszuk,Lidia Bandura,Michał Wróbel,Wojciech Franus

doi:10.3390/ma13215023

Abstract

Brick debris is one of the main construction wastes obtained from demolition of buildings. However, this material can be successfully used in the recycling process. The purpose of the study was to determine the brick dust addition effect on asphalt surface service life. An asphalt concrete reference mix was designed for bonding layer and prepared using a Marshall compacting device. In addition, three mixes with combined lime-brick filler were prepared as well as one mix containing only brick filler. The samples were tested for their volumetric properties—density, bulk density, air void content, resistance to water and frost and stiffness modulus with varying test temperatures. It was found that 25% of brick dust addition to the filler did not considerably change the properties of the tested samples, while in the case of 50% filler the replacement stiffness and frost resistance decrease; however, the minimum required value is maintained. It can be concluded that the lime filler can be replaced with up to 50% of brick dust without a negative impact on the properties of asphalt mix. The proposed solution fits into the idea of sustainable development indicating a way of brick debris management.

Highlights

A properly formed road network is an important factor in the economic development of each country
The paper presents the influence of brick debris dust addition on the properties of asphalt mix
The use of mixed lime-brick filler could contribute to the increase in recycling of brick debris obtained from the demolition of old buildings and structures

Summary

Introduction

A properly formed road network is an important factor in the economic development of each country For this reason, in many regions, investment in construction of new roads and modernization of existing ones is being increased every year. It is becoming increasingly crucial to use sustainable solutions, for instance warm mix asphalt technology, in the road construction industry [3,4,5]. Another way to achieve clean asphalt mix production is to use waste materials interchangeably as mineral aggregates [6,7] or as an additive affecting the properties of the asphalt binder [8,9]. The mineral filler, which is ground limestone in a conventional asphalt mix, can be replaced by waste material such as: lime kiln dust [10], waste glass powder [11], fly ash [12], ash from biomass combustion [13], cement and calcium hydroxide [14], waste oyster shells [15], calcium carbide [16] and others [17]

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Methods

Conclusion