Microstructure and strength behavior of mortars containing steel slag and waste sand

Article Sidebar

pdf
Published: Jun 25, 2020
DOI: https://doi.org/10.14456/microsc-microanal-res.2020.4
Keywords:
mortar sand steel slag cement compressive strength microstructure

Main Article Content

Namthip Kingnoi
Suranaree University of Technology
Jiratchaya Ayawanna
Suranaree University of Technology
Jariya Chanet
Suranaree University of Technology
Anutida Jansamoot
Suranaree University of Technology
Areeya Kerdkla
Suranaree University of Technology
Salisa Chaiyaput
King Mongkut's Institute of technology Ladkrabang

Abstract

This study deals with the production of mortars containing steel slag (SS) and waste sand (WS) as replacement of Ordinary Portland Cement (OPC) and an ordinary construction sand (CS), respectively. Four compositions of the mortar mixes of OPC: CS, OPC: WS, SS: CS and SS: WS were prepared in a weight ratio of 1:2.75 using a fixed water content of 0.485 by weight tested in different aging time for 1, 7, 14 and 28 days in air and saturated limewater. The flow percent, compressive strength and microstructure were evaluated. The waste sand containing mortars were higher flow percent values to affect the longer setting time than the ordinary construction sand containing mortars. The compressive strength values of ordinary cement mortars and ordinary sand mortars better than those of slag mortars and sand waste. The compressive strength increases with an increase in the curing time, the highest strength was 28 days-curing. Also, the compressive strength of mortars curing in air was thus higher than the mortars curing in saturated limewater. The microstructure showed that calcium silicate hydrate (CSH) phase promoting strength in ordinary cement mortars. Meanwhile, calcium hydroxide (Ca(OH)2) crystals and needle-like ettringite crystals were mostly observed in the slag mortars with low strength of the slag mortars both curing in air and saturated limewater.

Article Details

How to Cite
(1)
Kingnoi, N.; Ayawanna, J. .; Chanet, J.; Jansamoot, A.; Kerdkla, A.; Chaiyaput, S. Microstructure and Strength Behavior of Mortars Containing Steel Slag and Waste Sand. Microsc. Microanal. Res. 2020, 33, 13-17.
Issue
Vol. 33 No. 1 (2020): Microsc. Microanal. Res.
Section
The 37th International Conference on The Microscopy Society of Thailand

References

[1] Imrose B. Muhit, Muhammad T. Raihan and MD. Nuruzzama, Determination of mortar strength using stone dust as a partially replaced material for cement and sand, Advances in Concrete Construction,2014, 2, 249-259.
[2] Á. Rodriguez, J.M. Manso, Á. Aragón, J.J. Gonzalez, Strength and workability of masonry mortars manufactured with ladle furnace slag. Resources, Conservation and Reclying, 2009, 53, 645-651.
[3]Radenovic, A., Malina, J., Sofilic, T., and Sorrell, C., Characterization of ladle furnace slag from carbon steel production as a potential adsorbent, Advance in Materials Science and Engineering. 2013, 1-6.
[5] Serjun, V.Z., Mirti, B., and Mladenovi, A., Evaluation of ladle slag as a potential material for building and civil engineering, Material and Technology, 2013, 47(5): 543-550.
[4] M.E. Parron-Rubio, F. Perez-Garcia, A. Gonzalez-Herrera, M.D. Rubio-Cintas, Concrete properties comparison when substituting a 25% cement with slag from different provenances, Materials, 2018, 11, 1-11.
[6] S. Maschio, E. Aneggi, L. Fedrizzi, F. Andreatta, M. Lekka, A. Lanzutti, E. Furlani, Production and compressive strength of mortars containing unprocessed waste powdered steel slag, Sustainability, 2017, 7, 1-11.
[7] Md.A. Hasan, Md.M. Islam, Md.H. Kabir, Md.S. Islam, Strength behavior of mortar using slag as partial replacement of sand, 1st Int. Conf. Adv. Civil Eng., 2012.
[8] Joseph F. Lamond, J.H. Pielert, Significance of Tests and Properties of Concrete and Concrete-making Materials, ASTM international, 2006.