01874537

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https://annualmeeting.myt...nlineProgram/Details/19101

The primary objective of this study was to evaluate field-curing methods of cement concrete cylinders and beams for estimating the early opening strength of pavement to traffic. One concrete pavement mixture was used for casting a total of 60 – 100 mm x 200 mm (4 in. x 8 in.) cylinders, 60 – 150 mm x 300 mm (6 in. x 12 in.) cylinders, and 30 – 150 mm x 150 mm x 500 mm (6 in. x 6 in. x 20 in.) beams. Further, six small – 600 mm x 600 mm x 200 mm (24 in. x 24 in. x 8 in.) and six large – 900 mm x 900 mm x 300 mm (36 in. x 36 in. x 12 in.) test slabs were also cast outdoors for mimicking concrete pavement and field conditions. Half of the above specimens and slabs were cast and cured outdoors in warmer temperatures and the remaining half in colder temperatures. Concrete cylinders were cured using three different methods, namely, ambient air, insulated box/cooler, and power-operated box. Beams were cured using two different methods, namely, ambient air and insulated plywood box. The cast-in-place (CIP) specimens from each slab and cylinders were tested for compressive strength, and beams were tested for flexural strength after 1, 3, and 7 days of curing. Overall, it was found that field-curing of 150 mm (6 in.) cylinders inside insulated box (cooler) can estimate early (1 to 3 days) opening strength of cement concrete pavement within acceptable range.

This paper was sponsored by TRB committee AKM60 Standing Committee on Properties of Concrete and Constituent Materials.

TRBAM-23-01822

English

16p

2023

Transportation Research Board 102nd Annual Meeting

Digital/other

Figures; Photos; References; Tables

Compressive strength; Concrete curing; Concrete pavements; Concrete tests; Flexural strength

Highways; Materials; Pavements

Transportation Research Board Annual Meeting 2023 Paper #TRBAM-23-01822

TRIS, TRB, ATRI

Feb 13 2023 10:39AM