Year: 2015
Type: article
Abstract: The usage of Ultra-High Strength Fiber Reinforced Concrete (UHSFRC) with higher compressive strength (15,000-29,000 psi) in construction industry has been increasing worldwide.UHSFRC is also known as reactive powder concrete (RPC) which exhibits excellent durability and mechanical properties.This is one of the latest and emerging topics in the concrete technology.Structural elements cast with UHPC can carry larger loads and exhibit energy absorption capacity with smaller sections.The high compressive strength, higher tensile strength along with almost negligible water and chloride permeability therefore better durability of this new concrete material makes it UHSFRC.The basic principle in UHSFRC is to make the cement matrix as dense as possible, by reducing the micro cracks and capillary pores in the concrete and also to make a dense transition zone between cement matrix and aggregates.These special properties of concrete can be achieved by eliminating the coarse aggregates and replacing them with quartz sand of maximum size of 600 microns.Concrete (UHSFRC) using materials that are available locally are always economical since the patented products are very expensive and the materials such as silica sand and quartz powder are not readily available.The research also includes use of recognized mineral admixtures, natural river sand, steel fibers, and superplasticizers (Sika Viscocrete 2100 -3% by weight of cement, Melflux 4930 -1% by weight of cementitious material) and an optimum dosage of silica fume was 15 % by weight of the cement Ping Yi for their invaluable suggestions and insightful comments.I would like to acknowledge Jay Whitt from ESSROC for his immense technical support and providing Type III cement.I would like to acknowledge P.T. Hutchins Company for proving me powdered Superplasticizer.I would also like to acknowledge ELKEM for providing me Un-densified Silica Fume throughout my research work.I would Also like to thank Gary Neilson from Sika Corporation for proving High range Water Reducing Agent , I would like to extend my sincere thanks to Mr. David McVaney for his help in the laboratory.I would like thank my family for supporting me.
Author: Hafeez Mohammed
Institution: University of Akron
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2601672584