Stone paving for heavier traffic loads

摘要

Contrary to public belief, engineers and architects have limited data on the structural behaviour of stone paving that is subject to the movement of modernday traffic. This paper presents a brief history of stone paving and the reasons for its current revival. Recent research studies aimed at both improving understanding of stone paving and obtaining more cost-effective design and construction are described. The current availability of design guidance and engineering standards is reviewed. Lessons from recently completed schemes are used to complement existing guidance in preparing designs, developing specifications and improving construction. The key issues covered include: the need to marry visual and structural requirements; novel designs; factors that increase the risk of failure; and training and aftercare. The paper concludes that successful engineering of stone paving requires careful planning. The risk of failure can be considerable if certain key factors are not considered. In particular, the basic principles of constructing stone paving need to be understood by stone layers. Traditional laying techniques are not appropriate for schemes that accommodate heavy loads. In terms of aftercare, the paper highlights the need for regular inspections to identify early-life defects, and describes a technique that can be used to improve levels of skid and slip resistance without affecting the visual appearance of the stone surface.