A Study on the Improvement of Mortar Materials Used for Laying Bricks

A Study on the Improvement of Mortar Materials Used for Laying Bricks

FalouNdow(Falou Ndow)

指導教授 ： 吳傳威

國立臺北科技大學/工程學院/土木與環境工程國際學生研究所專班/碩士(2014年)

https://doi.org/10.6841/NTUT.2014.00501

摘要

This thesis presents a study on the improvement of mortar material used for laying bricks and blocks in The Gambia, in order to find an optimum mixing formula for the mortar. Five different mortar mixes, with water-to-cement ratios (w/c) of (0.8, 0.7, 0.65, 0.6 and 0.5) and a cement-to-sand ratio of 1:3, were tested using the flow table to calculate the flow and to obtain the optimum w/c ratio. Then batches of geopolymer mortars cubes were made using geopolymer-to-sand ratios of 1:1 and 1:2.
Results from the flow table test shows that the optimum w/c ratio for mortar made from sand samples from The Gambia is 0.65 and an increase in the water/cement ratio increases the workability and flow rate of the mortar but decreases the compressive strength. Compressive test results showed that the cement mortars made from sand samples in Taiwan are stronger than the ones made from sand samples in The Gambia. The final part of the results showed that mortar made from geopolymer has a higher strength (more than 80%) than cement mortar.

關鍵字

Mortar ； Masonry ； Aggregates ； Geopolymer ； Fineness Modulus ； Compressive Strength.

並列摘要

This thesis presents a study on the improvement of mortar material used for laying bricks and blocks in The Gambia, in order to find an optimum mixing formula for the mortar. Five different mortar mixes, with water-to-cement ratios (w/c) of (0.8, 0.7, 0.65, 0.6 and 0.5) and a cement-to-sand ratio of 1:3, were tested using the flow table to calculate the flow and to obtain the optimum w/c ratio. Then batches of geopolymer mortars cubes were made using geopolymer-to-sand ratios of 1:1 and 1:2.
Results from the flow table test shows that the optimum w/c ratio for mortar made from sand samples from The Gambia is 0.65 and an increase in the water/cement ratio increases the workability and flow rate of the mortar but decreases the compressive strength. Compressive test results showed that the cement mortars made from sand samples in Taiwan are stronger than the ones made from sand samples in The Gambia. The final part of the results showed that mortar made from geopolymer has a higher strength (more than 80%) than cement mortar.

並列關鍵字

Mortar ； Masonry ； Aggregates ； Geopolymer ； Fineness Modulus ； Compressive Strength.

參考文獻

[5] McKee, Harley J. Introduction to Early American Masonry - Stone, Brick, Mortar, and Plaster. National Trust for Historic Preservation, Columbia University, 1973. p 61.

[6] Boynton, Robert S. Chemistry and Technology of Lime and Limestone. Second Edition. New York: John Wiley & Sons, Inc., 1980.

[10] McKee, Harley J. Introduction to Early American Masonry - Stone, Brick, Mortar and Plaster. National Trust for Historic Preservation, Columbia University, 1973. p 68.

[11] Spewiek, John P. The History of Masonry in America, Proceedings of the 7th Canadian Masonry Symposium. Vol 2. Canada: McMaster University, 1995. pp. 663-677. Sfd

[16] O. P. Jaggi, History of science and technology in India, Volume 1, Atma Ram, 1969.