Open AccessPerformance of Nanoparticles Combination (SiO2, Al2O3) on Highway Concrete Pavement
Author(s) -
Nahla Yassoub Ahmed,
Fatimah Fahem Al-khafaji
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/870/1/012063
Subject(s) - flexural strength , materials science , compressive strength , composite material , young's modulus , cement , nanoparticle , elastic modulus , modulus , nanotechnology
Nano materials are being used in concrete technology to enhance the sustainability of performance grade for the pavement construction. In this paper, test investigations are conducted to study the addition effect of nanoparticles combination (Al 2 O 3 , SiO 2 ) with the average diameter of 20 nm and with different acceptable percentages (Al 2 O 3 : 0% and SiO 2 : 0 %), (Al 2 O 3 : 0.5% and SiO 2 : 0.5 %), (Al 2 O 3 : 0.5% and SiO 2 : 1 %), (Al 2 O 3 : 0.5% and SiO 2 : 1.5 %), (Al 2 O 3 : 1% and SiO 2 : 0.5 %), (Al 2 O 3 : 1.5% and SiO 2 : 0.5 %) and (Al 2 O 3 : 1% and SiO 2 : 1 %) by weight of cement on the mechanical properties (compressive strength, flexural strength and modulus of elasticity) and the thickness design of concrete pavement. The optimal combination which contributed to the highest values of mechanical properties at (28) days in order to maintain the workability requirement of nano concrete mixes was found (Al 2 O 3 : 1% and SiO 2 : 0.5 %) which associated with the decrement in concrete pavement thickness, when all other factors were held constant. It is concluded that cement modification with nano particles (combination of SiO 2 and Al 2 O 3 ) increased compressive strength, flexural strength and modulus of elasticity though decreased concrete pavement thickness.