English to Spanish Tech/Engineering Petroleum Eng/Sci

This is the sentence where the terms appear "A small footprint grout spread consisting of 2 mixers and 2 concrete pumps, functioning as primary and secondary/back-up pumps, was used for the grouting work." I understand the author is explaining a "cementación/inyección de cemento" process, but I have no idea of what "spread" here means.
any idea or help?? Thanks a lot!!!!!!