UNSPSC 31371106: Calcium silicate blocks

UNSPSC 31371106 Calcium silicate blocks, a Commodity code, nominally names a specific masonry material but shows minimal alignment with recent state and local procurement activity under the code. The three recent opportunities posted under this classification span sewer infrastructure repair, asphalt and concrete crushing services, and pavement rehabilitation—scopes that involve concrete pipe, recycled aggregates, and asphalt overlay work rather than calcium silicate block procurement. The issuing bodies are county-level public works and sanitation districts in California, with no evidence of repeat buyers or a consistent product category across the opportunities tagged to this code.

The geographic activity clusters in California, specifically Santa Clara County and Cherokee County. Santa Clara County Sanitation District No. 2-3 posted an ITB (ITBRDAFY270088) due September 17, 2026 for sewer mainline repairs involving removal and replacement of vitrified clay pipe with PVC and HDPE pipe, new precast concrete manholes, and service laterals—work completed in sixty-five working days. Santa Clara County also posted an ITB (ITBRDAFY260694) due May 21, 2026 for Central Expressway pavement rehabilitation including partial depth recycling, hot mix asphalt overlay, PCC curb and gutter installation, and ADA improvements, with 142 working days to completion. Cherokee County Board of Commissioners Purchasing Department solicited competitive sealed bids (PE77123NONST2027000000137) due August 25, 2026 for concrete and asphalt crushing services in support of Public Works, with limited scope detail available. The code shows little relevant recent activity; the posted opportunities do not substantively involve calcium silicate block sourcing or installation.