Abstract
Aim of this study was to introduce an eco-friendly, low cost and durable clay bricks with partial substitution of Cow Dung Ash (CDA). Five types of clay brick, consist CDA percentages 0, 5 10, 15 and 20% to the total weight of mixture, were manufactured by employing traditional method of dimension (18.5×8.5×6.5) cm3. The clay and CDA were well mixed with the addition of sufficient amount of water to form a good workability. Green molded bricks were allowed to dry under sunlight for two days and then fired in the traditional brick kiln. Physical properties of the burned red bricks were then tested and analyzed with Sri Lankan and British Standard Specifications. The average density, water absorption, compressive strength and flexural strength for 10% Cow Dung Ash (CDA) are 1447 kg.m-3, 17%, 150 kg.cm-2 and 0.82 kg.cm-2 respectively. These physical properties were compared with the standard brick purely manufactured from clay. From the results, clay-CDA bricks are obviously superior to the control brick; those are available in the Eastern region markets.
Highlights
Clay bricks are most important building materials, because of its eco-friendly nature
The results clearly show that all the bricks, satisfy recommended value of 12% as per the Sri Lankan Standard [18] 855: Part 1: 1989 and British Standard
From various physical properties studies performed by adding different percentage of Cow Dung Ash (CDA), it could be concluded that partial addition of CDA improves the physical properties of the fired clay bricks within the limit of experimental error
Summary
Clay bricks are most important building materials, because of its eco-friendly nature. Many research studied shows that some admixtures increase the bond between the particles and increase the efficiency of the brick. Such admixtures are lime, sawdust ash, rice husk ash, ground nut shell ash, coconut shell ash, bamboo leaf ash, tobacco leaf ash, rice husks, sawdust, etc., [1,2,3,4,5,6,7,8,9,10,11,12]. The main aim of the research was to disseminate the knowledge of admixtures among the brick making community and to build a green environment by utilizing the natural agro waste materials. This research investigated the effect of clay brick with partial addition of Cow Dung Ash (CDA) on the efficiency of the brick
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