Concrete loses workability during discharge or finishing.
Use the site evidence to agree a project-specific method with the responsible engineer, concrete producer, manufacturer or specialist applicator.
Concrete loses workability during discharge or finishing.
Measure temperature and timing; review cement chemistry, admixture compatibility and batch sequence.
Heat or incompatible combinations can cause rapid stiffening.
Stop unapproved water additions and investigate with producer before adjusting the mix.
Trial revised proportions and sequence at expected site temperature.
Verify workable window and early and later strength in repeat trials.
Do not place material that cannot be properly compacted.
References inform the topic; they do not endorse a specific product for this project.