Title:
How to Eliminate Concrete Scaling
Author(s):
Frank W. Madderdom
Publication:
Concrete International
Volume:
2
Issue:
2
Appears on pages(s):
110-114
Keywords:
air-entrained concretes; curing; deicers;
durability; scaling.
DOI:
Date:
2/1/1980
Abstract:
This paper presents methods that can be used by specifier, ready-mixed concrete producer, contractor, and owner to help eliminate the scaling problem. It points out that concrete must be treated more carefully and must be demonstrated to be durable. The specifier should take steps necessary to write a tight concrete specification and enforce it by the use of a qualified independent testing laboratory that reports to the owner or owner’s representative.The ready-mixed concrete producer must have a quality control program, The need for frequent inspection of the aggregates, the use of proper mix proportioning and batching techniques, and special attention to air contents are all necessary for the production of durable concrete. Air contents must be watched more carefully as many ready-mixed concrete producers have recently noticed rapid and unexplained loss of entrained air. The contractors must do their part in using reasonable slump, timely finishing with the right kind of tools, and early curing. Owners must be careful regarding the use of any deicers, especially those with ammonium sulfate or ammonium nitrate. [Author]