Pages: 109-134
THE RESULTS OF THE SPECIALISTS’ AND SCIENTISTS’ RESEARCHES
UDC 691
The effect of using hybrid nanomaterials on drying shrinkage and strength of cement pastes
Author: : Saaid I. Zaki, Professor in Hosing and Building National Research Center HBRC , Cairo ,
Egypt ; Tahreer street, 87, dokki, Cairo, Egypt; 11511, Post box no 1770, saaid_zaki@yahoo;
Author: Hossam A. Hodhod, Professor in Faculty of Engineering Cairo University, Cairo, Egypt;
Tahreer street, 87, dokki, Cairo, Egypt; 11511, Post box no 1770, saaid_zaki@yahoo;
Author: Mostafa A. Mahdi, Assistant Lecturer in Faculty of Engineering, Misr University for Science and Technology, Giza, Cairo , Egypt ; Tahreer street, 87, dokki, Cairo, Egypt; 11511, Post box no 1770, saaid_zaki@yahoo.
Extended Abstract:
The aim of this work is to study the effect of nanomaterials on the properties of cement paste, the experimental program included three parts: a- two types of nanosilica, locally produced NS1 and imported NS2, b- nanoclay (NC) and c- Hybrid nanoparticles (NS1 & NC). In each part,
cement paste was used with different percentages of nanoparticles. Compressive strength and drying shrinkage tests were applied in each part on the cured and uncured samples. The results showed that the compressive strength improved in the cement paste mixtures in the cured condition, the optimum percentages was 1% for NS1, 1% for NS2, 5% for NC, and 5% (0.5%NS1 & 4.5%NC) for hybrid nanoparticles. The drying shrinkage increases with adding nanosilica and hybrid nanoparticles, while it decreases when adding NC.
Key words: nanosilica, nanoclay, hybrid nanomaterials.
DOI: dx.doi.org/10.15828/2075-8545-2016-8-2-109-134
References:
- Mahdi M.A. The Effect of U sing Nano Materials on the Properties of Cement Paste
and Mortar. M.Sc Thesis on Structural Department, Faculty of Engineering, Cairo
University, Egypt, September 2015.
- Mohamed A.M. I nfluence of Nano Materials on Flexural Behavior and Compressive
Strength of Concrete. HBRC Journal, November 2014.
- Sobhy I. Effect of U sing Nano- Silica Particles on the Properties of Different Concrete
Mixes. MSc. Thesis, Civil Department, Faculty of Engineering, H elwan U niversity,
Egypt 2012.
- Morsy M.S., Alsayed S.H., Aqel M. H ybrid Effect of Carbon Nanotube and Nano-
Clay on Physico-Mechanical Properties of Cement Mortar. Construction and Building
Materials, 25 (2011), PP (145–149).
- Yang H. Strength and Shrinkage Property of Nano Silica Powder Concrete. Department
of Civil Engineering, Shandong Jiaotong U niversity, Jinan, Shandong, 250023, China, 2nd I nternational Conference on Electronic & Mechanical Engineering and Information Technology (EMEIT-2012).
- Sadrmomtazi A., Fasihi A. I nfluence of Polypropylene Fibers on the Performance
of Nano-Sio2-Incorporated Mortar. I ranian Journal of Science & Technology,
Transaction B: Engineering, Vol. 34, No. B4, PP (385-395) Printed in The I slamic
Republic of Iran, 2010 Shiraz University.
- Tobоn J.I, Restrepo O.J, Payа J. Comparative Analysis of Performance of Portland
Cement Blended with Nanosilica and Silica Fume. Dyna, May 12th, 2010, 163,
PP (37–46).
- Belkowitz J.S., Armentrout D. An I nvestigation of Nano Silica in the Cement H ydration
Process Concrete Sustainability Conference. National Ready Mixed Concrete
Association, 2012, PP (1–15).
- Sadrmomtazi A., Fasihi A., Balalaei F., Haghi A.K. I nvestigation of Mechanical and
Physical Properties of Mortars Containing Silica Fume and Nano-SiO2. The 3rd I nternational
Conference on Concrete and Development, Tehran, I ran, PP (1153–1161), April 2009.
- Senff L., Labrincha JOA., Ferreira V.M., Hotza D., Repette W.L. Effect of Nano-
Silica on Rheology and Fresh Properties of Cement Pastes and Mortars. Construction
and Building Materials 23, 8 February 2009, PP (2487–2491).
- Hakamy A., Shaikh F.U.A., Low I.M. Characteristics of H emp Fabric Reinforced
Nanoclay–Cement Nanocomposites. Cement & Concrete Composites, 50 (2014),
PP (27–35).
- Patel K. The U se of Nanoclay as a Constructional Material. Department O f Civil
Engineering, L .D. College of Engineering Ahmedabad- G ujarat, I ndia. I nterna
tional Journal of Engineering Research and Applications, Vol. 2, I ssue 4, July-
August 2012, PP (1382–1386).
- M.S. Morsy, S.H. Sayed Al., Aqel M. Effect of Nano-clay on Mechanical Properties
and Microstructure of O rdinary Portland Cement Mortar. I nternational Journal
of Civil & Environmental Engineering IJCEE-IJENS (2010) Vol: 10 No: 01.
- ES Specification 2421. Determination of Standard Water Cement Ratio for Cement
Pastes.
- ECP 203. Drying Shrinkage of Cement Mortar Containing Portland cement. Egyptian
Code for Design and Construction of Concrete Structures, Tests G uide, part 1 PP (62-67), HBRC, Cairo, Egypt, 2003.
- ASTM C 157-04. Test Method for L ength Change of H ardened H ydraulic Cement
Mortar and Concrete. ASTM inter, 2004.
- Zaki. S.I. Assessment of the Durability of Nano Silica / Fly Ash Cement Pastes
Exposed to Normal and Aggressive Curing Conditions. Seventh I nternational Conference
O n Nanotechnology in Construction (NTC 2015), Sharm El-Sheikh, Egypt, March 2015.
- Zaki S.I., Sobhy I. The U se of Activated Nano Clay to Develop the Compressive
Strength and Microstructure of H igh Performance Concrete. CTU Conference,
Concrete in the Low Carbon Era, the University of Dundee, UK, 9–11 July. 2012.
- Zaki S.I., Ragab K.S., Rashad A.M. The U se of Nano SiO2 to Develop the Water
Permeability and Microstructure of H igh Performance Concrete». I nternational
conference on Nano Technology for G reen and Sustainable Construction 14–17,
Cairo, Egypt, March 2010.
- Zaki S.I., Ragab K.S. H ow Nano Technology Can Change Concrete Industry. 1st I nternational
Conference O n Sustainable Built Environment I nfrastructures in Developing
Countries, I SSN 2170–0095, O ran, Algeria, 12–14 O ctober 2009, vol. 1, PP (407–414).
- Zaki Saaid I. Assessment of the durability of nanosilica / Fly ash cement pastes exposed
to normal and aggressive curing conditions. Nanotehnologii v stroitel’stve =
Nanotechnologies in Construction. 2015, Vol. 7, no. 3, pp. 78–99. – DOI: dx.doi.
org/10.15828/2075-8545-2015-7-3-78-99.
- Zaki Saaid I. Application of ultra cellulose fiber for the enhancement of the durability
and shrinkage of cement pastes exposed to normal and aggressive curing
conditions. Nanotehnologii v stroitel’stve = Nanotechnologies in Construction.
2015, Vol. 7, no. 4, pp. 121–142. DOI: dx.doi.org/10.15828/2075-8545-2015-7-4-121-142.
