Effect of coarse grain aggregate on strength parameters of two-stage concrete

Vol. 559 (3) 2019 / sobota, 23 marca, 2019


F. Omidimoaf,
A. M. Rajabi,
H. S. Abdelgader,
M. Kurpińska,
K. Wilde

DOI: 10.15199/33.2019.03.01

Volume 559: Issue 3
Pages 2-4
Accepted for publication: 21.02.2019 r.

Two-stage concrete (TSC) is a special type of concrete that themethod of its construction and implementation is different fromconventional one. In TSC, coarse aggregate particles are first placed in the formwork and voids between themare subsequently injected with a special cementations mixture. TSC has been successfully used in many applications, such as underwater construction, casting concrete sections congested with reinforcement and concrete repair. Coarse aggregate forms about 60% of the total volume of TSC, while coarse aggregate forms about 40% of the total volume of conventional concrete. In TSC stresses are transferred through contact areas between coarse aggregate particles. In this paper coarse aggregate size influence on strength parameters of TSC and comparing it with conventional concrete is done (by uniaxial compressive strength test and Brazilian tensile strength test). According to results of tests in this paper, the TSC with finest grain of coarse aggregate has higher compressive and tensile strength, higher modulus of elasticity and less Poisson’s ratio from conventional concrete.
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mgr inż. Farzam Omidimoaf, University of Qom, Department of Civil Engineering; Iran prof. dr inż. Ali M. Rajabi, University of Tehran, School of Geology, Engineering Geology Department; Iran prof. dr inż. Hakim S. Abdelgader, University of Tripoli; Department of Civil Engineering; Libya dr. inż. Marzena Kurpińska, Gdansk University of Technology, Faculty of Civil and Environmental Engineering, Poland prof. dr hab. inż. Krzysztof Wilde, Gdansk University of Technology, Faculty of Civil and Environmental Engineering, Poland

prof. dr inż. Hakim S. Abdelgader, University of Tripoli; Department of Civil Engineering; Libya