In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Become an ACI Member
Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
American Concrete Institute
38800 Country Club Dr.
Farmington Hills, MI
Chat with Us Online Now
Feedback via Email
Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: The Significance of Chlorides in Concrete Trial Mixes
Appears on pages(s):
Abstract:The concentration of acid-soluble chlorides in concrete has been used to determine the risk of corrosion of reinforcing steel despite indications that the level of free chloride ions may be overestimated by this test, which may result in the rejection of otherwise suitable aggregates. To assess the influence of sample size on the test results, 100mm diameter x 200mm long concrete cylinders were ground to 150μm and analysed for acid-soluble chloride in accordance with
AS 1012.20, modified to improve accuracy. The concrete was found to contain between 0.03% and
0.04% chloride by weight. The same concrete was extracted in boiling water. The water soluble chloride content was no more than 1/35 of that measured by acid extraction. The constituents of the concrete mix were then analysed by acid extraction and total chlorides determined. Hardened concrete samples of the mix were made and analysed for chloride by acid extraction, with the quantity of chloride found to be within 0.1% of the quantity of chloride in the constituents. Water extraction found nil chlorides. Additional samples of the concrete mix were prepared containing an added known quantity of sodium chloride and analysed. The chloride was recovered quantitatively using acid and water extraction, with water extraction finding nil chlorides.
Concrete Institute of Australia, International Partner Access.
View Resource »