A Study of Producing High Strength Concrete By using Silica Fume and Super Plasticizer

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