The phrase "additional build up of" is correct and usable in written English.
It can be used when discussing an increase or accumulation of something, often in a context related to growth or intensification.
Example: "The additional build up of stress in the workplace can lead to decreased productivity and employee burnout."
Alternatives: "further accumulation of" or "extra increase in".
Temperature data shows development of a non-linear gradient across the bridge width, which explains an additional build-up of stresses found on diaphragm members at the outside girders.
These illustrate a generally accumulative scour process i.e. a relatively rapid scour induced by the leading wave, with an additional build-up of the scour depth during additional trailing waves.
An example is seen in Figure 4. Presumably, the slow additional build-up of surface-adsorbed material involved a number of processes: A comparatively rapid transport of polyion surfactant ion complexes to the surface, an attachment to the surface, and a reorganization of the composite adsorbed layer including also displacement of the initially adsorbed surfactant with the polyion.
Dry area well after removing rust to avoid additional build up.
Despite an additional build-up in the number of riot police officers, many of them rushed to London from areas around the country, gangs of hooded young people appeared to be outmaneuvering the police for the third successive night.
This leads to small influence of an additional (due to climate-carbon cycle interactions) build up of the carbon dioxide on climate state when C is large.
Scratching rosin can also lead to larger pieces of rosin attaching to the bow hair and additional rosin build up on your instrument.
Build up your set of clubs.
We suspect U.S. import tariffs and to a lesser degree Brexit concerns are playing a role in slowing manufacturing activity outside of the U.S. Inventory build ups ahead of additional tariff increases and Brexit have led to full warehouses.
Build up your base level of strength.
