High-temperature curing application for concrete comprising fly ash and GGBS
By: Najas, M. S. M
.
Contributor(s): Vaseekaran, T.
Publisher: Mumbai ACC LTD 2023Edition: Vol.97(3), Mar.Description: 16-25p.Subject(s): Civil EngineeringOnline resources: Click here
In:
Indian Concrete Journal - ICJSummary: Fly ash (FA) and ground granulated blast-furnace slag (GGBS) are two promising supplementary cementitious materials (SCMs) that can be used in concrete applications. The early age strength development of such concrete is generally slow; however, the strength reduction can fairly be recovered with high-temperature curing implementation. In this study, the compressive strength behavior of binary and ternary concrete mixes those were subjected to 24 hours 50°C and 70°C curing conditions was explored. Two target compressive strengths levels of 30 MPa and 50 MPa were considered and the SCM blend level was 25 %. The results highlighted that, in terms of early strength achievement, the 50°C curing was favourable for the ordinary Portland cement (OPC) and OPC/GGBS mixes whereas the 70°C curing was attractive in the OPC/FA and in the ternary mixes. For the latter age strength, the high temperature curing detrimentally affected for the OPC and OPC/FA mixes whereas a considerable enhancement was noted for the GGBS blended mixes. The overall effectiveness of the high-temperature curing process was higher in the 30 MPa mixes than in the 50 MPa mixes. Meanwhile, the Arrhenious maturity function based strength predictions were identified to be more accurate than its prediction potential reported for past iso-thermal hightemperature curing applications.
| Item type | Current location | Call number | Status | Date due | Barcode | Item holds |
|---|---|---|---|---|---|---|
Articles Abstract Database
|
School of Engineering & Technology (PG) Archieval Section | Not for loan | 2023-0978 |
Fly ash (FA) and ground granulated blast-furnace slag (GGBS) are two promising supplementary cementitious materials (SCMs) that can be used in concrete applications. The early age strength development of such concrete is generally slow; however, the strength reduction can fairly be recovered with high-temperature curing implementation. In this study, the compressive strength behavior of binary and ternary concrete mixes those were subjected to 24 hours 50°C and 70°C curing conditions was explored. Two target compressive strengths levels of 30 MPa and 50 MPa were considered and the SCM blend level was 25 %. The results highlighted that, in terms of early strength achievement, the 50°C curing was favourable for the ordinary Portland cement (OPC) and OPC/GGBS mixes whereas the 70°C curing was attractive in the OPC/FA and in the ternary mixes. For the latter age strength, the high temperature curing detrimentally affected for the OPC and OPC/FA mixes whereas a considerable enhancement was noted for the GGBS blended mixes. The overall effectiveness of the high-temperature curing process was higher in the 30 MPa mixes than in the 50 MPa mixes. Meanwhile, the Arrhenious maturity function based strength predictions were identified to be more accurate than its prediction potential reported for past iso-thermal hightemperature curing applications.
Click on an image to view it in the image viewer
There are no comments for this item.