文章基本信息

标题：Assessment of Strength Characteristics of ConcreteMade from Locally Sourced Gravel Aggregate fromSouth-South Nigeria
本地全文：下载
作者：Gideon Olukunle Bamigboye ; Anthony Nkem Ede ; Uwanabasi Edet Umana 等
期刊名称：Current Journal of Applied Science and Technology
印刷版ISSN：2457-1024
出版年度：2015
卷号：12
期号：5
页码：1-10
语种：English
出版社：Sciencedomain International
摘要：Aims: The aim of this research is to verify the suitability of local gravel aggregates obtained from the Southern part of Akwa Ibom State for designed concrete production in place of crushed granite aggregate sourced from distance places at exorbitant cost. This paper assesses the strength characteristics of concrete made from two locally sourced gravel aggregates of 10 mm and 20 mm maximum sizes.Study Design: Three samples of gravels divided into washed and unwashed gravels were used for the research. Concrete mix design of 25 N/mm2 at 28 days of curing was the target mean strength of the research.Place and Duration of Study: Department of Civil Engineering, Covenant University, Ota –Nigeria, between September 2014 and July 2015.Methodology: Particle size distribution test, specific gravity test, water absorption test, aggregate crushing value test, flakiness and elongation tests, slump test, compressive strength test were performed on the samples. Concrete cubes150 mm were cast for each gravel size and three specimen tested for 3, 7, 14, 21 and 28 days compressive strength.Results: The washed gravels with 10 mm and 20 mm maximum size reached the target mean strength with 29.7 N/mm2 and 26.2 N/mm2 respectively while the unwashed gravel with 20 mm maximum size yielded a compressive strength of 24.5 N/mm2 at 28 days.Conclusion: The results prove that the size, grading, internal bonding and deleterious material contribute immensely to the strength of concrete made from gravel aggregate.
关键词：Concrete;gravel aggregate;aggregate size;aggregate properties;compressive strength;deleterious materials