TY - JOUR
T1 - Effects of organo-modified montmorillonite on strengths and permeability of cement mortars
AU - Kuo, Wen Yih
AU - Huang, Jong Shin
AU - Lin, Chi Hsien
N1 - Funding Information:
The financial support of the National Science Council, Taiwan, ROC, under contract number NSC 91-2211-E006-113 is gratefully acknowledged.
PY - 2006/5
Y1 - 2006/5
N2 - Organo-modified montmorillonites (OMMT) which have been widely used in polymer/clay nano-composites are employed here as fillers and reinforcements in cement mortars. The ratio of quartz sand and cement is 2.75 while the water/cement ratios of 0.40, 0.485 and 0.55 are considered for the cement mortars we studied. Experimental results indicate that the coefficients of permeability of cement mortars could be 100 times lower if a lower dosage of OMMT micro-particles is added. At the same time, the compressive and flexural strengths of cement mortars can be even increased up to 40% and 10%, respectively. It is also found that the optimal dosage of OMMT micro-particles to give higher compressive and flexural strengths and a lower coefficient of permeability for cement mortars is less than 1%. Meanwhile, the microstructure of cement mortars is characterized by using SEM, EDS and MIP to evaluate the effects of OMMT micro-particles on the improvements of strengths and permeability of cement mortars.
AB - Organo-modified montmorillonites (OMMT) which have been widely used in polymer/clay nano-composites are employed here as fillers and reinforcements in cement mortars. The ratio of quartz sand and cement is 2.75 while the water/cement ratios of 0.40, 0.485 and 0.55 are considered for the cement mortars we studied. Experimental results indicate that the coefficients of permeability of cement mortars could be 100 times lower if a lower dosage of OMMT micro-particles is added. At the same time, the compressive and flexural strengths of cement mortars can be even increased up to 40% and 10%, respectively. It is also found that the optimal dosage of OMMT micro-particles to give higher compressive and flexural strengths and a lower coefficient of permeability for cement mortars is less than 1%. Meanwhile, the microstructure of cement mortars is characterized by using SEM, EDS and MIP to evaluate the effects of OMMT micro-particles on the improvements of strengths and permeability of cement mortars.
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U2 - 10.1016/j.cemconres.2005.11.013
DO - 10.1016/j.cemconres.2005.11.013
M3 - Article
AN - SCOPUS:33646114275
SN - 0008-8846
VL - 36
SP - 886
EP - 895
JO - Cement and Concrete Research
JF - Cement and Concrete Research
IS - 5
ER -