This report has been prepared

iw--'irrfOTiiTSti'ari and- record

purposes arrd is not-to 'bO1 referenced.

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pu bfc&tio-fl. NATIONAL BUREAU OF STANDARDS REPORT

EVALUATION OF REFRACTORY QUALITIES OF

CONCRETES FOR JET AIRCRAFT WARM-UP , POWER CHECK

MAINTENANCE APRONS, AND RUNWAYS

BY

J„ V. Ryan, E. C. Turna and W. H. Bet turn

8510

Quarterly Report

U. S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
THE NATIONAL BUREAU OF STANDARDS

The National Bureau of Standards is a principal focal point in the Federal Government for assuring

maximum application of the physical and engineering sciences to the advancement of technology in

industry and commerce. Its responsibilities include, development and maintenance of the national stan

ards of measurement, and the provisions of means for making measurements consistent with those

standards; determination of physical constants and properties of materials; development oi methods

for testing materials, mechanisms, and structures, and making such tests as may be necessary, particularly for government agencies; cooperation in the establishment of standard practices for incorporation in codes and specifications; advisory service to government agencies on scientific and technica

problems; invention and development of devices to serve special needs of the Government; assistance

to industry, business, and consumers in the development and acceptance of commercial standards and

simplified trade practice recommendations; administration of programs in cooperation with United

States business groups and standards organizations for the development of international standards ol

practice; and maintenance of a clearinghouse for the collection and dissemination of scientific, technical, and engineering information. The scope of the Bureau’s activities is suggested in the following

listing of its four Institutes and their organizational units.

Institute for Basic Standards. Electricity. Metrology. Heat. Radiation Physics. Mechanics Applied Mathematics. Atomic Physics. Physical Chemistry. Laboratory Astrophysics. Radio Standards Laboratory: Radio Standards Physics; Radio Standards Engineering. Office of Standard Reference Data. Institute for Materials Research. Analytical Chemistry. Polymers. Metallurgy. Inorganic Mate- Cryogenics.* rials. Reactor Radiations. ** Office of Standard Reference Materials.

Central Radio Propagation Laboratory.** Ionosphere Research and Propagation. Troposphere

and Space Telecommunications. Radio Systems. Upper Atmosphere and Space Physics.

Institute for Applied Technology. Textiles and Apparel Technology Center. Building Research.

Industrial Equipment. Information Technology. Performance Test Development. Instrumentation.

Transport Systems. Office of Technical Services. Office of Weights and Measures. Office of Engineering Standards. Office of Industrial Services.

* NBS Group, Joint Institute for Laboratory Astrophysics at the University of Colorado. ** Located at Boulder, Colorado.
NATIONAL BUREAU OF STANDARDS REPORT

ms project ms report

42102-12-4210472 July 23, 1964 8510

Quarterly Report

on EVALUATION OF REFRACTORY QUALITIES

of

CONCRETES FOR JET AIRCRAFT WARM-UP, POWER CHECK

MAINTENANCE APRONS, AND RUNWAYS

by

J. V. Ryan, E. C, Tuma and W. Jl. Bet turn Fire Research Section

Building Research Division

Sponsored by;

Department of the Navy

Bureau of Yards and Docks

Reference: Task Y-F015-15-102

NBS File No. 10.02/10472

NATIONAL BUREAU OF ST i for use within the Government, and review. For this reason, the whole or in part, is not authori Bureau of Standards, Washingtc

the Report has been specifically

IMPORTANT NOTICE

Approved for public release by the

Director of the National Institute of

Standards and Technology (NIST) on October 9, 2015.

;s accounting documents intended

subjected to additional evaluation

listing of this Report, either in

: Office of the Director, National

the Government agency for which

opies for its own use. <NBS>

U. S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

Quarterly Report

on

EVALUATION OF REFRACTORY QUALITIES OF

CONCRETES FOR JET AIRCRAFT WARM-UP, POWER CHECK

MAINTENANCE APRONS, AND RUNWAYS

by

J. V. Ryan, E* C. Tuma and W. H. Bettum

1 » Introduction

The purpose of this project is the development of criteria for the

fabrication of jet exhaust resistant concretes. Concretes under study

are evaluated by exposure to hot gases from a combustion chamber. The

combustion chamber, delivers these gases at velocities and temperatures

approaching field conditions,

2, Present Plan of the Investigation

The experimental work has been completed in the present Fiscal Year,

A summary report on the whole project will be prepared promptly in Fiscal

Year 1965,

3, Activities

Two sets of specimens were prepared during this quarter, one con- taining diabase aggregate, the other blast furnace slag. Both sets of

specimens were conditioned in the fog room for one week. One-half of

each set was oven dried for one week before testing,

3,1 Minimal Conditioning

The curing and drying time was again reduced on two sets of speci- mens in an attempt to determine the minimum fog-room and oven-drying

time required so the specimens would still develop the required strength

and resistance to jet impingement. The first set, Di-6, consisted of

six 12~in. diameter by 6-in, thick cylindrical specimens plus nine

3 x 4 x 16 in, beams. The cylindrical specimens were instrumented with

thermocouples at the surface, 1/8 in., 1/4 in., 3/8 in,, and 1/2 in.,

and with two pressure tubes at 1/2-in. depth. All the specimens in each

set were put in the fog room as soon as the forms were removed. At seven days, three cylinders and three beams were put in an oven and

heated to 110°C; another three beams were conditioned at ‘73°F and 50

percent Rh. At the end of the oven drying period (7 days) all six of

the cylindrical specimens were exposed to the jet impingement test.

The beam specimens were broken in flexure and compressive strength

measurements made on the beam ends*
- 2 -

The second set of specimens were made of blast furnace slag

aggregate (BF-3) , and were conditioned and instrumented in the same manner as the Di-6 specimens described in the first paragraph.

The results are given in Tables 1 & 2.

3.2 Conclusions

The five sets of specimens tested after various times of fogroom curing and accelerated drying show little or no adverse effects

in strength or resistance to spalling in comparison to the specimens

conventionally cured and dried.

USCOMM-NBS-DC
Table

1.

Results

From

Specimens

After

Short

Conditioning

Periods

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