MUTHANNA JOURNAL OF ENGINEERING AND TECHNOLOGY (MJET)
Effect of Silica Fume and Polypropylene Fibers on the Mechanical Properties of Pervious Concrete
Haider Araby Ibrahim
Civil Engineering Department ,College of Engineering, Al-Muthanna University.
Email address: firstname.lastname@example.org
In this paper, Silica Fume (S.F.) be used for reinforce pozzolanic cement paste and
the effect of using many weight percentages as (0%, 5%, 10%, 15%, and 20%) to
lessening the concrete weight as a cement replacement in concrete mixtures on the
mechanical properties was studied. High range water reducing added to decrease the
water demand of the concrete, when silica fume added. Moreover, (0.025%, 0.05%,
0.1%, and 0.15%) are the proportions of polypropylene Fibers (P.P.F.) by volume,
which used to improve the pervious concrete mechanical properties, physical, and
mechanical properties of hardened concrete containing voids ratio, compression
strength, and flexural strength and, splitting tensile strength investigated. The density
of reference pervious concrete that was get through the experimental work was( 1835
Kg/m3 ) at (28) days ,it permeability coefficient (K) and voids content was( 0.324)
cm/s, and (30.21%) successively, The results shown important increase in
compression, splitting tensile and flexural strengths of pervious concrete containing
silica fume and (P.P.F.) comparison with reference pervious concrete. The mixture of
(10%) of (SF) and (0.1%) of (P.P.F.) gave optimum increased in the compressive,
flexural, and splitting tensile strengths compared with the reference mix and the
results (47.8%, 29.21%, and 24.41%) respectively.
Keywords: Pervious Concrete, polypropylene Fibers, Silica Fume, compressive strength, permeability coefficient, voids content.