Abstract
This paper described an investigation and evaluation which was carried out in the United Kingdom-UK, on the properties of masonry building block materials that incorporate waste materials, namely: steel slag, crushed glass, coal fly ash, rice husk ash (RHA), incinerator sewage sludge ash (ISSA), municipal solid waste incinerator bottom ash (MSWIBA) or shortened as IBA, bound with bitumen or asphalt, named as Bitublock. The binder used was 50 pen bitumen. The properties of the blocks evaluated were: compressive strength, density, porosity, initial rate of suction (IRS), creep, and volume stability. It was found that the Bitublock performance can be improved by optimizing porosity and curing regime. Compaction level of 2 MPa and curing regime of 200°C for 24 hours gave satisfactory bitublock performances that at least comparable to concrete block found in the United Kingdom (UK). The Volume stability (expansion) of the unit is affected by environment relative humidity.
Highlights
Demands on building materials have increased from time to time in most part of the world in line with the increasing number of population
The results described above and the analysis, lead to the following conclusions: - Bitublock is a sustainable masonry material that can incorporate various types of waste aggregate materials
- The performance of the Bitublock can be improved by optimising porosity and curing regime
Summary
Demands on building materials have increased from time to time in most part of the world in line with the increasing number of population. Among materials demanded is masonry material for constructing housings. In phase with sustainability in building construction, utilization of waste materials had been encouraged. The incorporation of those waste materials (the case in the UK), supports the UK government target to reduce the amount of commercial and industrial waste going to landfill to 85% of 1998 levels by 2005 [1]. The Directive’s overall aim is to prevent or reduce as far as possible negative effects on the environment, in particular the pollution of surface water, groundwater, soil and air, and on the global environment, including the greenhouse effect, as well as any resulting risk to human health, from the land filling of waste, during the whole lifecycle of the landfill [1]
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