Abstract:
The aim of this study was to evaluate the performance of high strength
Concrete (HSC) containing supplementary cementations materials (Silica Fume)
and to find optimum range of silica fume content in the mix.
In these study we prepared to tested some properties of high strength concrete
60 mpa in both fresh and hardened cases used slump test , compressive strength
test and absorption test . The mix content silica fume in deferent percentage:
0.00%, 5.00%,10.00% and 15.00% replacement . 12 cube at each percentage
tested at 3,7,28 days . Tested using local Sudanese aggregates with replacement
(Silica Fume) and super plasticizers MCs 100 with 0.8%, 1%, 1.2% liter /100 kg
c.m. Various percentages of silica fume (SF) were added at one
water/cementations materials ratios (w/c.m).
The methodology adopted to achieve the objectives of the research focuses
mainly on a collection of data from different sources, an extensive review of
previous studies, designing concrete mixes and implementing a lot of laboratory
experiments using different ratios of silica fume and super plasticizer with low
water contents. Ninety six of specimens were performed and 8 trial mix design of
grade (60 MPa) HSC had been success fully produced and their mechanical
properties were measured and documented.
From these research we observed that the storage of silica fume has very
important in final result ,whence silica fume replacement increases the slump test
and compressive strength decreases as a result of bad storage
