Cementation
Identify the degree of cementation if any is present. Use Table 4-5 for the classification:
Description | Field Identification | Approximate SPT |
|---|---|---|
Cemented Sand / Soil | Difficult drilling or SPT layer(s) comprised of sand and fines. | 30 to 99 |
Highly cemented sand / soil, weathered sandstone / bedrock | 1” or longer in-situ specimen can still be collected in split-spoon often designated as top of bedrock layer if no weaker strata is encountered below. | SPT Refusal, > 100 blows |
Bedrock | 1” or shorter in-situ specimen collected in split-spoon and coring efforts should commence. Use weathering, strength and rock descriptions located in this section. | SPT Refusal, > 100 blows |