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Report on 8-in. Bearing Walls of Concrete Masonry Units (Blocks)Made with Rotary Kiln Process Expanded Shale Aggregates

• ID:

  53

• ESCSI:

  3220.012

• Author:

  V.L.

• Publication Name:

  Underwriters' Laboratories Report

• Type of Publication:

  Paper

• Publisher:

  Underwriters' Lab. of Nat'l Board of Fire Underwriters

• Dated:

  1958

• Issue/Volume:

  April 14

• Other ID:

• Page(s):

  1-16, fig.1-25

• Reference List:

  N

• Abstract:

  This report covers load-bearing walls constructed of the three core hole type concrete blocks, nominally 8 in. wide, 8 in. high, and 16 in. long made of portland cement and expanded shale aggregate. The details of the aggregate concrete blocks, and walls are described under “Examination and Test Record”.Use: The concrete masonry units (blocks) are intended for use in exterior and interior bearing and nonbearing walls installed by methods commonly employed in erections of walls in which concrete blocks are used.
  Object: The object of the investigation was to establish a basis for theFire Retardant Classification of Concrete Masonry Units (Blocks) made of one part cement to nine parts of expanded shale aggregate (on volume basis) having variation in properties as herein described.