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

<p>In this study, two industrial wastes – circulating fluidized bed combustion co-fired fly ash (CFA) and ground granulated blast-furnace slag (GGBS) – were used as green materials instead of cementitious materials in controllable low strength material (CLSM). CLSM was used to backfill the pavement. CLSM should meet the compressive strength requirements of the CLSM specification (under 8.24 MPa), and it had the self-consolidating characteristics of fluidized concrete. In order to comply with the characteristics of self-consolidation, a mix design including superplasticizers, adhesives, and accelerators were used to ensure that the proportion could meet the requirements of both CLSM and the self-consolidating properties. The test methods included the slump flow test, ball drop test, strength activity index, compressive strength, mercury intrusion porosimetry, chlo-ride migration test, and scanning electron microscope. A water/cement ratio of 0.85 was used as the mix design for the CLSM requirements. The CFA and GGBS used in CLSM could replace 78 wt.% of the cement, and CLSM could effectively meet the requirements of the workability, strength and microscopic properties.</p>
</abstract>

In this study, two industrial wastes – circulating fluidized bed combustion co-fired fly ash (CFA) and ground granulated blast-furnace slag (GGBS) – were used as green materials instead of cementitious materials in controllable low strength material (CLSM). CLSM was used to backfill the pavement. CLSM should meet the compressive strength requirements of the CLSM specification (under 8.24 MPa), and it had the self-consolidating characteristics of fluidized concrete. In order to comply with the characteristics of self-consolidation, a mix design including superplasticizers, adhesives, and accelerators were used to ensure that the proportion could meet the requirements of both CLSM and the self-consolidating properties. The test methods included the slump flow test, ball drop test, strength activity index, compressive strength, mercury intrusion porosimetry, chlo-ride migration test, and scanning electron microscope. A water/cement ratio of 0.85 was used as the mix design for the CLSM requirements. The CFA and GGBS used in CLSM could replace 78 wt.% of the cement, and CLSM could effectively meet the requirements of the workability, strength and microscopic properties.

A study on the mixed properties of green controlled low strength cementitious

School of Civil and Architectural Engineering

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

{"article-title":"A study on the mixed properties of green controlled low strength cementitious"}

In this study, two industrial wastes – circulating fluidized bed combustion co-fired fly ash (CFA) and ground granulated blast-furnace slag (GGBS) – were used...

A study on the mixed properties of green controlled low strength cementitious

Publié en ligne: 06 juil. 2021

Pages: 59 - 74

Reçu: 16 févr. 2021

Accepté: 21 févr. 2021

DOI: https://doi.org/10.2478/msp-2021-0004

Mots clés
Co-fired fly ash, ground granulated blast-furnace slag, controlled low strength materials, self-consolidating concrete, green materials

© 2021 Sung-Ching Chen et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

A study on the mixed properties of green controlled low strength cementitious

Publié en ligne: 06 juil. 2021

Pages: 59 - 74

Reçu: 16 févr. 2021

Accepté: 21 févr. 2021

DOI: https://doi.org/10.2478/msp-2021-0004

Mots clésCo-fired fly ash, ground granulated blast-furnace slag, controlled low strength materials, self-consolidating concrete, green materials

© 2021 Sung-Ching Chen et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Mots clés
Co-fired fly ash, ground granulated blast-furnace slag, controlled low strength materials, self-consolidating concrete, green materials