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.
ACI World Headquarters
38800 Country Club Dr.
Farmington Hills, MI
ACI Middle East Regional Office
Second Floor, Office # 02.01/07
The Offices 02 Building, One Central
Dubai World Trade Center Complex
Phone: +971.4.516.3208 & 3209
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: A Study of the Penetration of Chloride
in Rice-Husk Ash Concrete
Author(s): A. A. Azevedo, M. 1. C. Martins, and D. C. Dal Molin
Publication: Special Publication
Appears on pages(s): 379-396
Keywords: chloride ions; concrete durability; mineral admixture;
rice husk ash
Abstract:A large number of relatively new reinforced concrete structures may require intervention due to problems affecting their durability. Repair and replacement costs of structures account for a considerable share of the total cost of constructions. Rice-husk ash (RHA) concrete displays lower permeability due to changes in the concrete microstructure, which reduces the vulnerability of this material to the action of aggressive agents. This study assesses concrete durability properties to chloride ions, an aggressive agent. The effect of chloride ions was investigated with tests of compressive strength and chloride penetration. These tests were performed in high initial strength portland cement concrete (CPV-ARI) modified with the addition of rice-husk ash (RHA) and in pozzolanic portland cement concrete (CPIV). The input variables were the water/cimentitious ratio (0.30-0.35-0.45-0.60-0.80) and the contents of the rice-husk ash additions (0%-5%-lo%-IS%/,-20%). Results show that the addition cf rice-husk ash to CPV-ARI concrete had no significant effect on compressive strength properties when compared to the reference concrete. Results for chloride penetration show that the addition of RHA produces an average reduction of 126.6% on the charge passed. Comparative results of RHA CPV-AR1 concrete and CPIV concrete show that the compressive strength performance of the latter is poorer than the former. Chloride penetration results show that CPIV concretes displayed a better performance than CPV-ARI concretes with and without the addition of RHA.
Click here to become an online Journal subscriber
Please enter this 5 digit unlock code on the web page.