scholarly journals Effects of Micro-silica and Nano-silica on Fresh Properties of Mortar

2017 ◽  
Vol 23 (4) ◽  
Author(s):  
Leo Gu LI ◽  
Pui-Lam NG ◽  
Zhao-Hui HUANG ◽  
Jiang ZHU ◽  
Albert Kwok-Hung KWAN
Keyword(s):  
Fresh Properties ◽  
Nano Silica ◽  
Micro Silica

Effect of Nano-silica on Fresh Properties and Rheology of Grouts

2015 ◽  
pp. 187-192
Author(s):  
Mohammed Sonebi ◽  
Patrick Carr ◽  
Y. Ammar
Keyword(s):  
Fresh Properties ◽  
Nano Silica

scholarly journals Experimental Study on the Mechanical Properties of Concrete using Micro Silica and Nano Silica - A Step Towards Sustainability

2016 ◽  
Vol V5 (11) ◽  
Author(s):  
Myriam Marie Delcasse ◽  
Nirmith .S. Kumar,Ashwith .S. ◽  
Nikethan .M.S. ◽  
Sunil Kumar .S. Nayak ◽  
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Nano Silica ◽  
Micro Silica

scholarly journals Short-Term Study on Mechanical and Fresh properties of Micro-silica based Self Consolidating Concrete in Nigeria

2021 ◽  
Vol 2 (1) ◽  
pp. 13-16
Author(s):  
T.A. Buari
Keyword(s):  
Partial Replacement ◽  
European Federation ◽  
Blockage Ratio ◽  
Fresh Properties ◽  
Self Compacting Concrete ◽  
Compressive Stresses ◽  
Slump Flow ◽  
Short Term Study ◽  
Funnel Flow ◽  
Micro Silica

The ever increasing environmental challenge arising from improper waste management has been a great concern to researchers and the society. One of such industrial waste is micro silica; a bye-product of the Carbothermic reduction of high purity quartz at temperature of about 2000oC in the presence of coke. The finess of this material and its pozollanic nature makes it suitable for use in the production of self-compacting concrete. In this research micro silica was introduced in percentages of, 5, 10 and 15% as partial replacement of cement in the production of self-compacting concrete. The fresh properties were examined using slump flow, T50cm, slump flow, V-funnel and blockage ratio using L-Box. As the Micro silica were introduced, T50cm time increased, Slump flow reduced, V-funnel flow time increased and L-Box value reduced, due to increase in viscosity. Comparing the experimental results with European Federation of National Associations of Representing for Concrete EFNARC 2002, blockage ratio for 15% was below 0.8. The compressive stresses at 28days were higher than the control at 28days compressive stress with 8.6%, 19.04% and 11.9% for 5%, 10% and 15% respectively. Thus, cement can be partially substituted with micro silica up to 15% with improvement in compressive strength in self-compacting concrete.

scholarly journals Effect of nano-silica on rheology and fresh properties of cement pastes and mortars

2009 ◽  
Vol 23 (7) ◽  
pp. 2487-2491 ◽  
Author(s):  
Luciano Senff ◽  
João A. Labrincha ◽  
Victor M. Ferreira ◽  
Dachamir Hotza ◽  
Wellington L. Repette
Keyword(s):  
Fresh Properties ◽  
Nano Silica ◽  
Cement Pastes

Effect of Nano-Silica Particles on the Fresh Properties of UHPC

2014 ◽  
Vol 629-630 ◽  
pp. 91-95
Author(s):  
Qian Qian Zhang ◽  
Jian Zhong Liu ◽  
Wei Lin
Keyword(s):  
Mechanical Properties ◽  
Cement Hydration ◽  
Physical And Mechanical Properties ◽  
Heat Evolution ◽  
Fresh Properties ◽  
Nano Silica ◽  
Cement Pastes ◽  
Binder Ratio ◽  
Nanosilica Particles ◽  
Water Binder Ratio

Nanotechnology is being used in UHPC for achieving more dense structural packing and better physical and mechanical properties. In this paper, nanosilica particles (0-1wt %) by cement were incorporated in cement pastes and mortars with water-binder ratio of 0.2, and their effect on fresh properties was addressed. The fresh properties of mixtures were investigated by spread, rheology and cohesiveness. In addition, effect of nanosilica on cement hydration was also investigated. The results show that significant increase of yield stress, viscosity and cohesiveness is observed with nanosilica above 0.005 wt% by cement, but nanosilica with content below 0.005% presents an improvement of workability especially with content of 0.002%. Moreover, the addition of nanosilica in cement pastes obviously accelerates the early cement hydration rate, but does not increase the cumulative heat evolution.

Combined effects of micro-silica and nano-silica on durability of mortar

2017 ◽  
Vol 157 ◽  
pp. 337-347 ◽  
Author(s):  
L.G. Li ◽  
J. Zhu ◽  
Z.H. Huang ◽  
A.K.H. Kwan ◽  
L.J. Li
Keyword(s):  
Combined Effects ◽  
Nano Silica ◽  
Micro Silica
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