Paper and Presentation by Geoff Ayton, Mark Mackenzie & John Turton from ASCP 4th Concrete Pavements Conference 2017
The maturity concept is based on the principle that concrete strength is related to the integrated product of age and temperature history. It has been used internationally for several decades as a non-destructive method for accurately estimating in-place strength
using a laboratory calibration that is developed for each specific mix. Ongoing refinement of the test equipment now allows remote monitoring of the in-situ maturity and hence the strength development. The collected data potentially provides increased assurance of the reliability of results and would also enable the identification of aberrations both within and between Lots.
These developments offer exciting opportunities on highway and airport concrete paving projects. The Roads and Maritime Services Agency NSW (RMS), for example, is a major user of concrete in both the Base and Subbase layers. The proven use of the maturity method could potentially allow a significant reduction in current sampling and testing methods such as coring which are relatively expensive, time-consuming and destructive. A further potential benefit is the potential to gather relevant in-place data which could assist in resolving technical issues during paving and contribute to the development of the technology.
This paper discusses the potential for application of the non-destructive maturity method to reduce testing costs and to increase confidence in the quality of the end product