Concrete dimensions fluctuate with atmospheric humidity: moisture leads to expansion, while drying induces shrinkage. Importantly, this moisture movement is reversible, unlike drying shrinkage, which occurs during hardening and causes permanent volume reduction.
However, the impact of humidity fluctuations and the associated reversible moisture movement is relatively minor (around 30%). According to MN Bussell & R Cather (1995), this limited contribution to overall movement typically does not necessitate the inclusion of movement joints in the design.
admin Changed status to publish July 30, 2024