- 學位論文
A Study on the Improvement of the Materials used for Manufacturing Hollow Blocks
A Study on the Improvement of the Materials used for Manufacturing Hollow Blocks
摘要
This thesis presents mix design formulae which can be used to obtain high quality blocks in The Gambia. Four sand samples with different Fineness Modulus values were used to make masonry cubes with a water-to-cement ratio (w/c) of 0.65. This process was repeated with a lower w/c ratio so as to achieve better compaction. Compression test results showed that the cubes produced using the lower water-to-cement ratio were stronger. The third part of the experiment was manufacturing concrete cubes made from geopolymer. This consisted of two procedures with different kaolin clay/sand plus aggregate sample ratios, namely; 1:1 and 1:2. Results showed that the cubes made from geopolymer are strong and more brittle than the ones made of concrete. Those made using the 1:1 ratio had higher strength values at the age of 28 days. In terms of density, the least values were 1912 kg/m3 and 1587 kg/m3 for the concrete and geopolymer cubes.
並列摘要
This thesis presents mix design formulae which can be used to obtain high quality blocks in The Gambia. Four sand samples with different Fineness Modulus values were used to make masonry cubes with a water-to-cement ratio (w/c) of 0.65. This process was repeated with a lower w/c ratio so as to achieve better compaction. Compression test results showed that the cubes produced using the lower water-to-cement ratio were stronger. The third part of the experiment was manufacturing concrete cubes made from geopolymer. This consisted of two procedures with different kaolin clay/sand plus aggregate sample ratios, namely; 1:1 and 1:2. Results showed that the cubes made from geopolymer are strong and more brittle than the ones made of concrete. Those made using the 1:1 ratio had higher strength values at the age of 28 days. In terms of density, the least values were 1912 kg/m3 and 1587 kg/m3 for the concrete and geopolymer cubes.