Developing high performance concrete for precast/prestressed concrete industry

摘要

High performance concrete (HPC) is a new class of concrete that has superior Received 19 August 2019 characteristics compared to conventional concrete. Despite of its superior characteristics, Received in revised form 2 October 2019 HPC is not widely used in local and international markets due to its high constituent Accepted 8 October 2019 materials cost. This paper presents the research done to develop economic HPC mixes using local materials and conventional mixing and curing techniques. HPC characteristics were a ?cae , attained using supplementary cementitious materials as silica fume and class C fly in Silica fume alkali-silica reaction + ae oe + Precast concrete partial replacement of Portland cement. Superplasticizers were used to maintain a high High performance concrete flowing ability using a low water-to-powder ratio. Concrete mixes were produced using a high energy mixer to maintain sufficient mix consistency. As a result, concrete mixes with 24-h compressive strength of 70 MPa and 28-day strength of 105 MPa were produced. Concrete samples tested for expansion using accelerated mortar bar test (AMBT) showed that developed concrete is not susceptible to alkali-silica reaction. Improved characteristics can be used in improving the performance of concrete construction projects, reduce required maintenance, and increase construction projects life-span. ? 2019 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).