COMPARATIVE ANALYSIS OF THE STRENGTH OF CONCRETE MADE FROM VARIOUS AGGREGATE

INTRODUCTION: This work was to present in one weight, the fundamental and practical information in the filed of the comparative analysis of the strength of concrete made from various aggregate which may be useful to people involve in civil and structural engineering and particularly, those that found pleasure in the design and related structure.

Due to  the strength/high cost of various aggregate in the market the  comparative analysis of strength of concrete  indifferent aggregate have revealed that one can definitely substituted in various aggregate by using the mixture design  of ration in different aggregate in building to reduce the mixture ration of aggregate or used any of the aggregates.

Where their is no granite stone washed gravel most black gravel is there  no black gravel must in such area there will be surface gravel in the project is going to be sited.

A great effort have been made through out this work although it is limited in scope to asses their suitability as stand and concrete aggregate. 

High cost of building materials has been the bane of construction industry in the developing countries of the world as a result of importation of most of the building materials. As prices increase sharply, there is a growing awareness to relate research to local materials as alternatives for the construction of functional but low-cost dwellings both in the urban and rural areas of Nigeria. One of such local material that is being researched is lateritic soil. Lateritic soil has been one of the major building materials in Nigeria for a long time. The main reason lies on the fact that it is readily available and the cost of procuring it is relatively low.

Concrete aggregates in soil possesses other advantages which makes it potentially a very good and appropriate material for construction, especially for the construction of rural structures in the developing countries. These merits include little or no specialized skilled labour required for laterized sandcrete blocks production and for its use in other construction works; and laterized concrete structures have potentially sufficient strength compared with that of normal concrete (Lasisi and Ogunjimi,1984).

In July 1976, the Nigerian Mining Corporation was directed to proceed with establishment of seven clay brick plants in Nigeria with annual production capacity of fifteen million normal size bricks (figure 1). Clay deposits for use by these plants were identified (Proda 1970, 1971, 1975a, 1975b and 1975c) as shown in table 1. Rather than studying, and developing the traditional technology, Nigeria automatically copied a highly automated brick making which is capital intensive and therefore, kept the unit cost of bricks too high for the average Nigerian to afford. The Nigerian Building and Road Research Institute (NIBRRI) thereafter introduced the soil - cement blocks using manual press for its production. This kept unit cost of the soil cement block down and affordable, but some characteristics of the soil-cement blocks needed to be improved by use of highly sandy concrete aggregates; which are already being used as fills in Nigeria (Otoko 2014)