Fibrous insulation and refractory concrete are used for logs as well as fireproof walls, incinerator bricks, planters, and roof shingles. Insulation is lighter and more shock resistant than fireclay. Lightweight slag bonded with refractory concrete serves as aggregrate

Kieselback, D. J.

Smock, A. W.

English

NASA Technical Reports Server

September 1971	 Brief 71-10339 
NASA TECH BRIEF 
Marshall Space Flight Center 	 -4:v 
NASA Tech Briefs announce new technology derived from the U.S. space program. They are issued to encourage 
commercial application. Tech Briefs are available on a subscription basis from the National Technical Information 
Service, Springfield, Virginia 22151. Requests for individual copies or questions relating to the. Tech Brief program may 
be directed to the Technology Utilization Office, NASA, Code KT, Washington, D.c. 20546. 
New Materials for Fireplace Logs 
Two materials employed in the Saturn program 
can be used to manufacture superior, low-cost, 
artificial fireplace logs, as well as fireproof walls, 
incinerator bricks, planters, and roof shingles. 
One material is a fibrous insulation that is much 
lighter in weight than fireclay, and is far less break-
able. Also, because the material is slightly compres-
sible, it can withstand more shock than fireclay. 
Commonly available tools can be used to mix 
the material components. After the mixture is placed 
• in a mold, it is ovendried at 372 K. Because the proc-
ess is not critical (e.g., drying at room temperature 
would be adequate), satisfactory mixtures could also 
be made at different temperatures. 
The second material is the lightweight, refractory 
concrete used in the rocket test stands to deflect 
exhaust. A lightweight slag can serve as the aggregate, 
bonded with a high alumina calcium alurninate re-
fractory cement. Although satisfactory concrete logs 
have been made, further investigation is needed to 
determine the exact proportions of components.
Note: 
Requests for further information may be directed 
to:
Technology Utilization Officer 
Code A&TS-TU 
Marshall Space Flight Center 
Huntsville, Alabama 35812 
Reference: B71-10339 
Patent status: 
No patent action is contemplated by NASA. 
Source: A. W. Smock

Marshall Space Flight Center, and

D. J. Kieselback of

Continuing Education Projects

under contract to

Marshall Space Flight Center

(M FS-21363)
Category 04 
This document was prepared under the sponsorship of the National 	 Government assumes any liability resulting from the use of the 
Aeronautics and Space Administration. Neither the United States	 information contained in this document, or warrants that such use 
Government nor any person acting on behalf of the United States 	 will be free from privately owned rights.
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New materials for fireplace logs

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