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Comparative study of the mechanical characteristics of sand mortar (cinder blocks) and compressed laterite bricks (BTC) stabilized with wement

Author Affiliations

  • 1National Superior School of Public Works (ENSTP) of N\'Djamena, Chad
  • 2Civil Engineering Laboratory of the National Superior School of Public Works (ENSTP), N′Djamena, Chad
  • 3Civil Engineering Laboratory of the National Superior School of Public Works (ENSTP), N′Djamena, Chad

Res. J. Recent Sci., Volume 9, Issue (1), Pages 1-11, January,2 (2020)

Abstract

The purpose of this study is to determine the dry and wet mechanical resistances after immersion in water of bricks of 15x20 x 40cm3 in sand mortar (cinder blocks) and 10x14x28cm3 compressed laterite mortar bricks(BTC) stabilized with cement. The experimental results obtained show that the 28-day compressive strength values of the 12% cinder blocks and those of the 10% cement Btcs are respectively 2.55MPa and 7.90MPa. These values are in accordance with the normative values recommended by the Building Materials Centre (CMC) in N\'Djamena (2.4MPa) and the Land Materials Research Centre (Craterre) (5MPa). In the presence of moisture, the loss of resistance is only 28% for BTC and 46% for cinder blocks. Also, the bricks have a suction capacity ranging from 2.50 to 5.02g/cm² S1/2 for BTC and 6.12 to 10.90g/cm². S1/2 for cinder blocks. These values are all less than 20g/cm². S1/2, a value imposed by NF P 554. A comparison of the results of this work shows that, with the same cement content, during dry seasons as in rainy seasons, BTCs are more resistant and more economical than cinder blocks.

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