Development of a Type I (PM) Cement – Supplementary Report 1 — Investigation of Locally Available Natural Pozzolans

Rahn, Perry H; Holm, Ronald A

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Development of a Type I (PM) Cement – Supplementary Report 1 — Investigation of Locally Available Natural Pozzolans

1993-03-31
By Rahn, Perry H ; Holm, Ronald A

File Language:

English

Details

Creators:

Rahn, Perry H ; Holm, Ronald A
Corporate Creators:

South Dakota School of Mines and Technology
Corporate Contributors:

South Dakota. Department of Transportation. Office of Research
Subject/TRT Terms:

Accelerated Tests Alkali Silica Reactions Control Economic Factors Economic Impacts Fly Ash Measures Of Effectiveness Pozzolan
Publication/ Report Number:

SD91-l l -F
Resource Type:

Tech Report
Geographical Coverage:

South Dakota ; United States
Edition:

Supplementary Report 1
Contracting Officer:

Johnston, Dan
Corporate Publisher:

South Dakota. Department of Transportation
Abstract:

A reconnaissance survey of potential sources of pozzolans within 100 miles of Rapid City resulted in the selection of 26 sites. Most of these sites are volcanic tuffs of shales. Pozzolanic activity index data show that the Pierre Shale, "fire clay" from the Lakota Formation and the Rockyford Ash are the most suitable. A detailed geologic description indicates that the most favorable units are volcanic ash beds typically mixed with fine-grained terrestrial sediments. Chemical analyses on 9 samples by ICP spectroscopy and the scanning electron microscope indicate that silica is high, ranging from :6 to 80%, and sodium and potassium are low. A mineralogical study by x-ray diffraction show that the predominant minerals are quartz and clay. The Rockyford Ash surprisingly showed 50% of the zeolite mineral clinoptilolite. Expansion tests show that the Rockyford Ash, Lakota fire clay, and Pierre Shale have the most promising pozzolanic qualities.
Format:

PDF
Funding:

310066
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:830a3de9916461582cd5bfed80ee6f81bd4ecfc94f75a20b80d6c10364e4ed9f4ba67ff360d590468382ad941d5e7c7246f0368e3165d16a1c54f72539cdc8a1
Download URL:

https://rosap.ntl.bts.gov/view/dot/80080/dot_80080_DS1.pdf
File Type:

[PDF - 5.05 MB ]

File Language:

English

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