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The Effect of Varying Range of Soil Grain Sizes on Cassava Starch Stabilized Compressed Earth

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Description

Download The Effect of Varying Range of Soil Grain Sizes on Cassava Starch Stabilized Compressed Earth. Building Technology students who are writing their projects can get this material to aid their research work.

Abstract

This study evaluated the strength and durability characteristics of cassava starch stabilized compressed earth bricks at 3 different grain size ranges.

Laterite obtained locally from Zaria was sieved into 3 constituent grain sizes ranges of ≤ 2.36mm, ≤ 1.18mm and ≤ 600µm. Earth bricks of size 140mm × 140mm × 80mm were produced with earth brick production machine through the application of a pressure of 4N/mm2. 

The bricks were produced at 6 different stabilization levels with cassava starch as stabilizer for all the grain size combinations. The stabilization level is; 0%, 4%, 8%, 12%, 16% and 20%. Result shows that cassava starch stabilized bricks attained a maximum compressive strength of 1.83N/mm2 at 28 days strength gain.

This is 10.9% higher than the NBRRI specified minimum strength of 1.65N/mm2 for compressed stabilized earth bricks.

Introduction

Earth as a building material is available everywhere. In developing countries, earth construction is economically the most efficient means to house the greatest number of people with the least demand of resources (Al-Sakkaf, 2009).

Traditional earth construction materials such as adobe bricks suffer from moisture attack and cracks, thus the need to continuously maintain them in order to keep them in good condition.

According to Adam and Agips (2001), traditional earth construction technology has undergone considerable developments that enhance earth’s durability and quality as a construction material for lowcost buildings.

Such methods include rammed earth and machine pressed compressed stabilized earth bricks. Stabilization of these earth bricks is achieved using various methods that often involve the use of a variety of stabilizers.

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