<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>This paper describes sprayed concrete experiments varying the set accelerator dose. Literature on the hydration of cement with modern alkali-free set accelerators is reviewed and two full scale wet spraying experiments have been conducted, varying the dose of set accelerator in each. The effects on the properties of the hardening and hardened sprayed concrete were investigated by field and laboratory testing. Increasing the set accelerator dose was found to increase the rate of early age strength development but reduce density, long term strength and increase suction porosity of hardened sprayed concrete.</p>
</abstract>

This paper describes sprayed concrete experiments varying the set accelerator dose. Literature on the hydration of cement with modern alkali-free set accelerators is reviewed and two full scale wet spraying experiments have been conducted, varying the dose of set accelerator in each. The effects on the properties of the hardening and hardened sprayed concrete were investigated by field and laboratory testing. Increasing the set accelerator dose was found to increase the rate of early age strength development but reduce density, long term strength and increase suction porosity of hardened sprayed concrete.

Effect of Set Accelerator on Properties of Wet Sprayed Concrete

MEng, CPEng, MIEAust, PhD Student, Norwegian University of Science and Technology

Adjunct Associate Professor, PhD, Norwegian University of Science and Technology

Professor, PhD, Norwegian University of Science and Technology

Nordic Concrete Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Effect of Set Accelerator on Properties of Wet Sprayed Concrete"}

This paper describes sprayed concrete experiments varying the set accelerator dose. Literature on the hydration of cement with modern alkali-free set...

Effect of Set Accelerator on Properties of Wet Sprayed Concrete

Published Online: Jul 11, 2022

Page range: 19 - 39

Received: Apr 07, 2022

Accepted: May 30, 2022

DOI: https://doi.org/10.2478/ncr-2022-0005

Keywords
Sprayed concrete, shotcrete, accelerator, porosity

© 2022 Nicholas Trussell et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Effect of Set Accelerator on Properties of Wet Sprayed Concrete

Published Online: Jul 11, 2022

Page range: 19 - 39

Received: Apr 07, 2022

Accepted: May 30, 2022

DOI: https://doi.org/10.2478/ncr-2022-0005

KeywordsSprayed concrete, shotcrete, accelerator, porosity

© 2022 Nicholas Trussell et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Sprayed concrete, shotcrete, accelerator, porosity