@article{(Open Science Index):https://publications.waset.org/pdf/10002653,
	  title     = {Influence of Gum Acacia Karroo on Some Mechanical Properties of Cement Mortars and Concrete},
	  author    = {Rose Mbugua and  Ramadhan Wanjala and  Julius Ndambuki},
	  country	= {},
	  institution	= {},
	  abstract     = {Natural admixtures provide concrete with enhanced
properties but their processing end up making them very expensive
resulting in increase to cost of concrete. In this study the effect
of Gum from Acacia Karroo (GAK) as set-retarding admixture
in cement pastes was studied. The possibility of using GAK as
water reducing admixture both in cement mortar concrete was
also investigated. Cement pastes with different dosages of GAK
were prepared to measure the setting time using different dosages.
Compressive strength of cement mortars with 0.7, 0.8 and 0.9%
weight of cement and w/c ratio of 0.5 were compared to those with
water cement (w/c) ratio of 0.44 but same dosage of GAK. Concrete
samples were prepared using higher dosages of GAK (1, 2 and 3%
wt of cement) and a water bidder (w/b) of 0.61 were compared to
those with the same GAK dosage but with reduced w/b ratio. There
was increase in compressive strength of 9.3% at 28 days for cement
mortar samples with 0.9% dosage of GAK and reduced w/c ratio.},
	    journal   = {International Journal of Civil and Environmental Engineering},
	  volume    = {9},
	  number    = {11},
	  year      = {2015},
	  pages     = {1414 - 1417},
	  ee        = {https://publications.waset.org/pdf/10002653},
	  url   	= {https://publications.waset.org/vol/107},
	  bibsource = {https://publications.waset.org/},
	  issn  	= {eISSN: 1307-6892},
	  publisher = {World Academy of Science, Engineering and Technology},
	  index 	= {Open Science Index 107, 2015},
	}