Laboratory characterization of cement-treated rock rubble as airfield pavement base layer

Abstract

As a means to ensure economic and environmental sustainability in pavementworks, the use of locally obtainedwastematerials (rocks) in base layer design as well as exploring energy-efficient construction methods is highly encouraged. This study explores the use of cement-treated recycled rocks of up to 1.5 in. (37 mm) in size as an alternative base layer material for the construction of airfield pavements. The Preplaced Aggregate Concreting Method (PAC) was implemented to construct the base layer without any vibration or compaction effort. This is an unconventional airfield pavement base construction method, which solely relies on the flowability of the grout mix to ensure the voids between rocks are filled up bymeans of gravity. The experimental program explores the compressive strength, modulus of elasticity and tensile strength of the material. The preliminary results demonstrate the potential of CTRR as a viable base layer alternative to existing stabilized bases.